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 | ||
b24a2516 YH |
398 | case IPV6_PKTINFO: |
399 | { | |
400 | struct in6_pktinfo pkt; | |
401 | ||
402 | if (optlen == 0) | |
403 | goto e_inval; | |
404 | else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL) | |
405 | goto e_inval; | |
406 | ||
914d1164 | 407 | if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) { |
b24a2516 YH |
408 | retv = -EFAULT; |
409 | break; | |
410 | } | |
411 | if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if) | |
412 | goto e_inval; | |
413 | ||
414 | np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex; | |
415 | ipv6_addr_copy(&np->sticky_pktinfo.ipi6_addr, &pkt.ipi6_addr); | |
416 | retv = 0; | |
417 | break; | |
418 | } | |
419 | ||
333fad53 | 420 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
421 | { |
422 | struct ipv6_txoptions *opt = NULL; | |
423 | struct msghdr msg; | |
424 | struct flowi fl; | |
425 | int junk; | |
426 | ||
427 | fl.fl6_flowlabel = 0; | |
428 | fl.oif = sk->sk_bound_dev_if; | |
429 | ||
430 | if (optlen == 0) | |
431 | goto update; | |
432 | ||
433 | /* 1K is probably excessive | |
434 | * 1K is surely not enough, 2K per standard header is 16K. | |
435 | */ | |
436 | retv = -EINVAL; | |
437 | if (optlen > 64*1024) | |
438 | break; | |
439 | ||
440 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
441 | retv = -ENOBUFS; | |
442 | if (opt == NULL) | |
443 | break; | |
444 | ||
445 | memset(opt, 0, sizeof(*opt)); | |
446 | opt->tot_len = sizeof(*opt) + optlen; | |
447 | retv = -EFAULT; | |
448 | if (copy_from_user(opt+1, optval, optlen)) | |
449 | goto done; | |
450 | ||
451 | msg.msg_controllen = optlen; | |
452 | msg.msg_control = (void*)(opt+1); | |
453 | ||
91e1908f | 454 | retv = datagram_send_ctl(net, &msg, &fl, opt, &junk, &junk); |
1da177e4 LT |
455 | if (retv) |
456 | goto done; | |
457 | update: | |
458 | retv = 0; | |
e7712f1a | 459 | opt = ipv6_update_options(sk, opt); |
1da177e4 LT |
460 | done: |
461 | if (opt) | |
462 | sock_kfree_s(sk, opt, opt->tot_len); | |
463 | break; | |
464 | } | |
465 | case IPV6_UNICAST_HOPS: | |
b2a9d7c2 YH |
466 | if (optlen < sizeof(int)) |
467 | goto e_inval; | |
1da177e4 LT |
468 | if (val > 255 || val < -1) |
469 | goto e_inval; | |
470 | np->hop_limit = val; | |
471 | retv = 0; | |
472 | break; | |
473 | ||
474 | case IPV6_MULTICAST_HOPS: | |
475 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 476 | break; |
b2a9d7c2 YH |
477 | if (optlen < sizeof(int)) |
478 | goto e_inval; | |
1da177e4 LT |
479 | if (val > 255 || val < -1) |
480 | goto e_inval; | |
481 | np->mcast_hops = val; | |
482 | retv = 0; | |
483 | break; | |
484 | ||
485 | case IPV6_MULTICAST_LOOP: | |
b2a9d7c2 YH |
486 | if (optlen < sizeof(int)) |
487 | goto e_inval; | |
28d44882 YH |
488 | if (val != valbool) |
489 | goto e_inval; | |
1da177e4 LT |
490 | np->mc_loop = valbool; |
491 | retv = 0; | |
492 | break; | |
493 | ||
494 | case IPV6_MULTICAST_IF: | |
495 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 496 | break; |
b2a9d7c2 YH |
497 | if (optlen < sizeof(int)) |
498 | goto e_inval; | |
1da177e4 | 499 | |
4953f0fc BH |
500 | if (val) { |
501 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) | |
502 | goto e_inval; | |
503 | ||
8a3edd80 | 504 | if (__dev_get_by_index(net, val) == NULL) { |
4953f0fc BH |
505 | retv = -ENODEV; |
506 | break; | |
507 | } | |
1da177e4 LT |
508 | } |
509 | np->mcast_oif = val; | |
510 | retv = 0; | |
511 | break; | |
512 | case IPV6_ADD_MEMBERSHIP: | |
513 | case IPV6_DROP_MEMBERSHIP: | |
514 | { | |
515 | struct ipv6_mreq mreq; | |
516 | ||
a28398ba WC |
517 | if (optlen < sizeof(struct ipv6_mreq)) |
518 | goto e_inval; | |
519 | ||
a96fb49b FL |
520 | retv = -EPROTO; |
521 | if (inet_sk(sk)->is_icsk) | |
522 | break; | |
523 | ||
1da177e4 LT |
524 | retv = -EFAULT; |
525 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
526 | break; | |
527 | ||
528 | if (optname == IPV6_ADD_MEMBERSHIP) | |
529 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
530 | else | |
531 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
532 | break; | |
533 | } | |
534 | case IPV6_JOIN_ANYCAST: | |
535 | case IPV6_LEAVE_ANYCAST: | |
536 | { | |
537 | struct ipv6_mreq mreq; | |
538 | ||
a28398ba | 539 | if (optlen < sizeof(struct ipv6_mreq)) |
1da177e4 LT |
540 | goto e_inval; |
541 | ||
542 | retv = -EFAULT; | |
543 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
544 | break; | |
545 | ||
546 | if (optname == IPV6_JOIN_ANYCAST) | |
547 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
548 | else | |
549 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
550 | break; | |
551 | } | |
552 | case MCAST_JOIN_GROUP: | |
553 | case MCAST_LEAVE_GROUP: | |
554 | { | |
555 | struct group_req greq; | |
556 | struct sockaddr_in6 *psin6; | |
557 | ||
a28398ba WC |
558 | if (optlen < sizeof(struct group_req)) |
559 | goto e_inval; | |
560 | ||
1da177e4 LT |
561 | retv = -EFAULT; |
562 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
563 | break; | |
564 | if (greq.gr_group.ss_family != AF_INET6) { | |
565 | retv = -EADDRNOTAVAIL; | |
566 | break; | |
567 | } | |
568 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
569 | if (optname == MCAST_JOIN_GROUP) | |
570 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, | |
571 | &psin6->sin6_addr); | |
572 | else | |
573 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, | |
574 | &psin6->sin6_addr); | |
575 | break; | |
576 | } | |
577 | case MCAST_JOIN_SOURCE_GROUP: | |
578 | case MCAST_LEAVE_SOURCE_GROUP: | |
579 | case MCAST_BLOCK_SOURCE: | |
580 | case MCAST_UNBLOCK_SOURCE: | |
581 | { | |
582 | struct group_source_req greqs; | |
583 | int omode, add; | |
584 | ||
a28398ba | 585 | if (optlen < sizeof(struct group_source_req)) |
1da177e4 LT |
586 | goto e_inval; |
587 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
588 | retv = -EFAULT; | |
589 | break; | |
590 | } | |
591 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
592 | greqs.gsr_source.ss_family != AF_INET6) { | |
593 | retv = -EADDRNOTAVAIL; | |
594 | break; | |
595 | } | |
596 | if (optname == MCAST_BLOCK_SOURCE) { | |
597 | omode = MCAST_EXCLUDE; | |
598 | add = 1; | |
599 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
600 | omode = MCAST_EXCLUDE; | |
601 | add = 0; | |
602 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
603 | struct sockaddr_in6 *psin6; | |
604 | ||
605 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
606 | retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, | |
607 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
608 | /* prior join w/ different source is ok */ |
609 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
610 | break; |
611 | omode = MCAST_INCLUDE; | |
612 | add = 1; | |
c9e3e8b6 | 613 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
614 | omode = MCAST_INCLUDE; |
615 | add = 0; | |
616 | } | |
617 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
618 | break; | |
619 | } | |
620 | case MCAST_MSFILTER: | |
621 | { | |
1da177e4 LT |
622 | extern int sysctl_mld_max_msf; |
623 | struct group_filter *gsf; | |
624 | ||
625 | if (optlen < GROUP_FILTER_SIZE(0)) | |
626 | goto e_inval; | |
627 | if (optlen > sysctl_optmem_max) { | |
628 | retv = -ENOBUFS; | |
629 | break; | |
630 | } | |
8b3a7005 | 631 | gsf = kmalloc(optlen,GFP_KERNEL); |
cfcabdcc | 632 | if (!gsf) { |
1da177e4 LT |
633 | retv = -ENOBUFS; |
634 | break; | |
635 | } | |
636 | retv = -EFAULT; | |
637 | if (copy_from_user(gsf, optval, optlen)) { | |
638 | kfree(gsf); | |
639 | break; | |
640 | } | |
641 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
642 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
643 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
644 | kfree(gsf); | |
645 | retv = -ENOBUFS; | |
646 | break; | |
647 | } | |
648 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
649 | kfree(gsf); | |
650 | retv = -EINVAL; | |
651 | break; | |
652 | } | |
653 | retv = ip6_mc_msfilter(sk, gsf); | |
654 | kfree(gsf); | |
655 | ||
656 | break; | |
657 | } | |
658 | case IPV6_ROUTER_ALERT: | |
b2a9d7c2 YH |
659 | if (optlen < sizeof(int)) |
660 | goto e_inval; | |
725a8ff0 | 661 | retv = ip6_ra_control(sk, val); |
1da177e4 LT |
662 | break; |
663 | case IPV6_MTU_DISCOVER: | |
b2a9d7c2 YH |
664 | if (optlen < sizeof(int)) |
665 | goto e_inval; | |
628a5c56 | 666 | if (val<0 || val>3) |
1da177e4 LT |
667 | goto e_inval; |
668 | np->pmtudisc = val; | |
669 | retv = 0; | |
670 | break; | |
671 | case IPV6_MTU: | |
b2a9d7c2 YH |
672 | if (optlen < sizeof(int)) |
673 | goto e_inval; | |
1da177e4 LT |
674 | if (val && val < IPV6_MIN_MTU) |
675 | goto e_inval; | |
676 | np->frag_size = val; | |
677 | retv = 0; | |
678 | break; | |
679 | case IPV6_RECVERR: | |
b2a9d7c2 YH |
680 | if (optlen < sizeof(int)) |
681 | goto e_inval; | |
1da177e4 LT |
682 | np->recverr = valbool; |
683 | if (!val) | |
684 | skb_queue_purge(&sk->sk_error_queue); | |
685 | retv = 0; | |
686 | break; | |
687 | case IPV6_FLOWINFO_SEND: | |
b2a9d7c2 YH |
688 | if (optlen < sizeof(int)) |
689 | goto e_inval; | |
1da177e4 LT |
690 | np->sndflow = valbool; |
691 | retv = 0; | |
692 | break; | |
693 | case IPV6_FLOWLABEL_MGR: | |
694 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
695 | break; | |
696 | case IPV6_IPSEC_POLICY: | |
697 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 HX |
698 | retv = -EPERM; |
699 | if (!capable(CAP_NET_ADMIN)) | |
700 | break; | |
1da177e4 LT |
701 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
702 | break; | |
703 | ||
7cbca67c YH |
704 | case IPV6_ADDR_PREFERENCES: |
705 | { | |
706 | unsigned int pref = 0; | |
707 | unsigned int prefmask = ~0; | |
708 | ||
b2a9d7c2 YH |
709 | if (optlen < sizeof(int)) |
710 | goto e_inval; | |
711 | ||
7cbca67c YH |
712 | retv = -EINVAL; |
713 | ||
714 | /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ | |
715 | switch (val & (IPV6_PREFER_SRC_PUBLIC| | |
716 | IPV6_PREFER_SRC_TMP| | |
717 | IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { | |
718 | case IPV6_PREFER_SRC_PUBLIC: | |
719 | pref |= IPV6_PREFER_SRC_PUBLIC; | |
720 | break; | |
721 | case IPV6_PREFER_SRC_TMP: | |
722 | pref |= IPV6_PREFER_SRC_TMP; | |
723 | break; | |
724 | case IPV6_PREFER_SRC_PUBTMP_DEFAULT: | |
725 | break; | |
726 | case 0: | |
727 | goto pref_skip_pubtmp; | |
728 | default: | |
729 | goto e_inval; | |
730 | } | |
731 | ||
732 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| | |
733 | IPV6_PREFER_SRC_TMP); | |
734 | pref_skip_pubtmp: | |
735 | ||
736 | /* check HOME/COA conflicts */ | |
737 | switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { | |
738 | case IPV6_PREFER_SRC_HOME: | |
739 | break; | |
740 | case IPV6_PREFER_SRC_COA: | |
741 | pref |= IPV6_PREFER_SRC_COA; | |
742 | case 0: | |
743 | goto pref_skip_coa; | |
744 | default: | |
745 | goto e_inval; | |
746 | } | |
747 | ||
748 | prefmask &= ~IPV6_PREFER_SRC_COA; | |
749 | pref_skip_coa: | |
750 | ||
751 | /* check CGA/NONCGA conflicts */ | |
752 | switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { | |
753 | case IPV6_PREFER_SRC_CGA: | |
754 | case IPV6_PREFER_SRC_NONCGA: | |
755 | case 0: | |
756 | break; | |
757 | default: | |
758 | goto e_inval; | |
759 | } | |
760 | ||
761 | np->srcprefs = (np->srcprefs & prefmask) | pref; | |
762 | retv = 0; | |
763 | ||
764 | break; | |
765 | } | |
1da177e4 | 766 | } |
7cbca67c | 767 | |
1da177e4 LT |
768 | release_sock(sk); |
769 | ||
1da177e4 LT |
770 | return retv; |
771 | ||
772 | e_inval: | |
773 | release_sock(sk); | |
774 | return -EINVAL; | |
775 | } | |
776 | ||
3fdadf7d DM |
777 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
778 | char __user *optval, int optlen) | |
779 | { | |
780 | int err; | |
781 | ||
782 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
783 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
784 | ||
785 | if (level != SOL_IPV6) | |
786 | return -ENOPROTOOPT; | |
787 | ||
788 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
789 | #ifdef CONFIG_NETFILTER | |
790 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
791 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
792 | optname != IPV6_XFRM_POLICY) { | |
793 | lock_sock(sk); | |
794 | err = nf_setsockopt(sk, PF_INET6, optname, optval, | |
795 | optlen); | |
796 | release_sock(sk); | |
797 | } | |
798 | #endif | |
799 | return err; | |
800 | } | |
801 | ||
7159039a | 802 | EXPORT_SYMBOL(ipv6_setsockopt); |
3fdadf7d DM |
803 | |
804 | #ifdef CONFIG_COMPAT | |
805 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 806 | char __user *optval, int optlen) |
3fdadf7d DM |
807 | { |
808 | int err; | |
809 | ||
810 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
811 | if (udp_prot.compat_setsockopt != NULL) |
812 | return udp_prot.compat_setsockopt(sk, level, optname, | |
813 | optval, optlen); | |
814 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
815 | } |
816 | ||
817 | if (level != SOL_IPV6) | |
818 | return -ENOPROTOOPT; | |
819 | ||
dae50295 DS |
820 | if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) |
821 | return compat_mc_setsockopt(sk, level, optname, optval, optlen, | |
822 | ipv6_setsockopt); | |
823 | ||
3fdadf7d DM |
824 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); |
825 | #ifdef CONFIG_NETFILTER | |
826 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
827 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
543d9cfe | 828 | optname != IPV6_XFRM_POLICY) { |
3fdadf7d | 829 | lock_sock(sk); |
543d9cfe ACM |
830 | err = compat_nf_setsockopt(sk, PF_INET6, optname, |
831 | optval, optlen); | |
3fdadf7d DM |
832 | release_sock(sk); |
833 | } | |
834 | #endif | |
835 | return err; | |
836 | } | |
543d9cfe ACM |
837 | |
838 | EXPORT_SYMBOL(compat_ipv6_setsockopt); | |
3fdadf7d DM |
839 | #endif |
840 | ||
28693079 | 841 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, |
4c6510a7 | 842 | int optname, char __user *optval, int len) |
333fad53 | 843 | { |
28693079 DM |
844 | struct ipv6_opt_hdr *hdr; |
845 | ||
4c6510a7 YH |
846 | if (!opt) |
847 | return 0; | |
848 | ||
849 | switch(optname) { | |
850 | case IPV6_HOPOPTS: | |
851 | hdr = opt->hopopt; | |
852 | break; | |
853 | case IPV6_RTHDRDSTOPTS: | |
854 | hdr = opt->dst0opt; | |
855 | break; | |
856 | case IPV6_RTHDR: | |
857 | hdr = (struct ipv6_opt_hdr *)opt->srcrt; | |
858 | break; | |
859 | case IPV6_DSTOPTS: | |
860 | hdr = opt->dst1opt; | |
861 | break; | |
862 | default: | |
863 | return -EINVAL; /* should not happen */ | |
864 | } | |
865 | ||
866 | if (!hdr) | |
333fad53 | 867 | return 0; |
28693079 | 868 | |
d2b02ed9 | 869 | len = min_t(unsigned int, len, ipv6_optlen(hdr)); |
660adc6e | 870 | if (copy_to_user(optval, hdr, len)) |
333fad53 | 871 | return -EFAULT; |
95b496b6 | 872 | return len; |
333fad53 YH |
873 | } |
874 | ||
3fdadf7d | 875 | static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
876 | char __user *optval, int __user *optlen) |
877 | { | |
878 | struct ipv6_pinfo *np = inet6_sk(sk); | |
879 | int len; | |
880 | int val; | |
881 | ||
7bc570c8 YH |
882 | if (ip6_mroute_opt(optname)) |
883 | return ip6_mroute_getsockopt(sk, optname, optval, optlen); | |
884 | ||
1da177e4 LT |
885 | if (get_user(len, optlen)) |
886 | return -EFAULT; | |
887 | switch (optname) { | |
888 | case IPV6_ADDRFORM: | |
889 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 890 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 | 891 | sk->sk_protocol != IPPROTO_TCP) |
1717699c | 892 | return -ENOPROTOOPT; |
1da177e4 LT |
893 | if (sk->sk_state != TCP_ESTABLISHED) |
894 | return -ENOTCONN; | |
895 | val = sk->sk_family; | |
896 | break; | |
897 | case MCAST_MSFILTER: | |
898 | { | |
899 | struct group_filter gsf; | |
900 | int err; | |
901 | ||
902 | if (len < GROUP_FILTER_SIZE(0)) | |
903 | return -EINVAL; | |
904 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
905 | return -EFAULT; | |
20c61fbd YH |
906 | if (gsf.gf_group.ss_family != AF_INET6) |
907 | return -EADDRNOTAVAIL; | |
1da177e4 LT |
908 | lock_sock(sk); |
909 | err = ip6_mc_msfget(sk, &gsf, | |
910 | (struct group_filter __user *)optval, optlen); | |
911 | release_sock(sk); | |
912 | return err; | |
913 | } | |
914 | ||
333fad53 | 915 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
916 | { |
917 | struct msghdr msg; | |
918 | struct sk_buff *skb; | |
919 | ||
920 | if (sk->sk_type != SOCK_STREAM) | |
921 | return -ENOPROTOOPT; | |
922 | ||
923 | msg.msg_control = optval; | |
924 | msg.msg_controllen = len; | |
925 | msg.msg_flags = 0; | |
926 | ||
927 | lock_sock(sk); | |
928 | skb = np->pktoptions; | |
929 | if (skb) | |
930 | atomic_inc(&skb->users); | |
931 | release_sock(sk); | |
932 | ||
933 | if (skb) { | |
934 | int err = datagram_recv_ctl(sk, &msg, skb); | |
935 | kfree_skb(skb); | |
936 | if (err) | |
937 | return err; | |
938 | } else { | |
939 | if (np->rxopt.bits.rxinfo) { | |
940 | struct in6_pktinfo src_info; | |
f250dcda YH |
941 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
942 | np->sticky_pktinfo.ipi6_ifindex; | |
943 | np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) : | |
944 | ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr)); | |
1da177e4 LT |
945 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); |
946 | } | |
947 | if (np->rxopt.bits.rxhlim) { | |
948 | int hlim = np->mcast_hops; | |
949 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
950 | } | |
333fad53 YH |
951 | if (np->rxopt.bits.rxoinfo) { |
952 | struct in6_pktinfo src_info; | |
f250dcda YH |
953 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
954 | np->sticky_pktinfo.ipi6_ifindex; | |
955 | np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) : | |
956 | ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr)); | |
333fad53 YH |
957 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); |
958 | } | |
959 | if (np->rxopt.bits.rxohlim) { | |
960 | int hlim = np->mcast_hops; | |
961 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
962 | } | |
1da177e4 LT |
963 | } |
964 | len -= msg.msg_controllen; | |
965 | return put_user(len, optlen); | |
966 | } | |
967 | case IPV6_MTU: | |
968 | { | |
969 | struct dst_entry *dst; | |
1ab1457c | 970 | val = 0; |
1da177e4 LT |
971 | lock_sock(sk); |
972 | dst = sk_dst_get(sk); | |
973 | if (dst) { | |
974 | val = dst_mtu(dst); | |
975 | dst_release(dst); | |
976 | } | |
977 | release_sock(sk); | |
978 | if (!val) | |
979 | return -ENOTCONN; | |
980 | break; | |
981 | } | |
982 | ||
983 | case IPV6_V6ONLY: | |
984 | val = np->ipv6only; | |
985 | break; | |
986 | ||
333fad53 | 987 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
988 | val = np->rxopt.bits.rxinfo; |
989 | break; | |
990 | ||
333fad53 YH |
991 | case IPV6_2292PKTINFO: |
992 | val = np->rxopt.bits.rxoinfo; | |
993 | break; | |
994 | ||
995 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
996 | val = np->rxopt.bits.rxhlim; |
997 | break; | |
998 | ||
333fad53 YH |
999 | case IPV6_2292HOPLIMIT: |
1000 | val = np->rxopt.bits.rxohlim; | |
1001 | break; | |
1002 | ||
1003 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
1004 | val = np->rxopt.bits.srcrt; |
1005 | break; | |
1006 | ||
333fad53 YH |
1007 | case IPV6_2292RTHDR: |
1008 | val = np->rxopt.bits.osrcrt; | |
1009 | break; | |
1010 | ||
1da177e4 | 1011 | case IPV6_HOPOPTS: |
333fad53 YH |
1012 | case IPV6_RTHDRDSTOPTS: |
1013 | case IPV6_RTHDR: | |
1014 | case IPV6_DSTOPTS: | |
1015 | { | |
1016 | ||
1017 | lock_sock(sk); | |
28693079 | 1018 | len = ipv6_getsockopt_sticky(sk, np->opt, |
4c6510a7 | 1019 | optname, optval, len); |
333fad53 | 1020 | release_sock(sk); |
05335c22 YH |
1021 | /* check if ipv6_getsockopt_sticky() returns err code */ |
1022 | if (len < 0) | |
1023 | return len; | |
333fad53 YH |
1024 | return put_user(len, optlen); |
1025 | } | |
1026 | ||
1027 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
1028 | val = np->rxopt.bits.hopopts; |
1029 | break; | |
1030 | ||
333fad53 YH |
1031 | case IPV6_2292HOPOPTS: |
1032 | val = np->rxopt.bits.ohopopts; | |
1033 | break; | |
1034 | ||
1035 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
1036 | val = np->rxopt.bits.dstopts; |
1037 | break; | |
1038 | ||
333fad53 YH |
1039 | case IPV6_2292DSTOPTS: |
1040 | val = np->rxopt.bits.odstopts; | |
1041 | break; | |
1042 | ||
41a1f8ea YH |
1043 | case IPV6_TCLASS: |
1044 | val = np->tclass; | |
d0ee011f RDC |
1045 | if (val < 0) |
1046 | val = 0; | |
41a1f8ea YH |
1047 | break; |
1048 | ||
1049 | case IPV6_RECVTCLASS: | |
1050 | val = np->rxopt.bits.rxtclass; | |
1051 | break; | |
1052 | ||
1da177e4 LT |
1053 | case IPV6_FLOWINFO: |
1054 | val = np->rxopt.bits.rxflow; | |
1055 | break; | |
1056 | ||
1057 | case IPV6_UNICAST_HOPS: | |
1da177e4 | 1058 | case IPV6_MULTICAST_HOPS: |
befffe90 BH |
1059 | { |
1060 | struct dst_entry *dst; | |
1061 | ||
1062 | if (optname == IPV6_UNICAST_HOPS) | |
1063 | val = np->hop_limit; | |
1064 | else | |
1065 | val = np->mcast_hops; | |
1066 | ||
1067 | dst = sk_dst_get(sk); | |
1068 | if (dst) { | |
1069 | if (val < 0) | |
6b75d090 | 1070 | val = ip6_dst_hoplimit(dst); |
befffe90 BH |
1071 | dst_release(dst); |
1072 | } | |
1073 | if (val < 0) | |
53b7997f | 1074 | val = sock_net(sk)->ipv6.devconf_all->hop_limit; |
1da177e4 | 1075 | break; |
befffe90 | 1076 | } |
1da177e4 LT |
1077 | |
1078 | case IPV6_MULTICAST_LOOP: | |
1079 | val = np->mc_loop; | |
1080 | break; | |
1081 | ||
1082 | case IPV6_MULTICAST_IF: | |
1083 | val = np->mcast_oif; | |
1084 | break; | |
1085 | ||
1086 | case IPV6_MTU_DISCOVER: | |
1087 | val = np->pmtudisc; | |
1088 | break; | |
1089 | ||
1090 | case IPV6_RECVERR: | |
1091 | val = np->recverr; | |
1092 | break; | |
1093 | ||
1094 | case IPV6_FLOWINFO_SEND: | |
1095 | val = np->sndflow; | |
1096 | break; | |
1097 | ||
7cbca67c YH |
1098 | case IPV6_ADDR_PREFERENCES: |
1099 | val = 0; | |
1100 | ||
1101 | if (np->srcprefs & IPV6_PREFER_SRC_TMP) | |
1102 | val |= IPV6_PREFER_SRC_TMP; | |
1103 | else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) | |
1104 | val |= IPV6_PREFER_SRC_PUBLIC; | |
1105 | else { | |
1106 | /* XXX: should we return system default? */ | |
1107 | val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; | |
1108 | } | |
1109 | ||
1110 | if (np->srcprefs & IPV6_PREFER_SRC_COA) | |
1111 | val |= IPV6_PREFER_SRC_COA; | |
1112 | else | |
1113 | val |= IPV6_PREFER_SRC_HOME; | |
1114 | break; | |
1115 | ||
1da177e4 | 1116 | default: |
cf6fc4a9 | 1117 | return -ENOPROTOOPT; |
1da177e4 LT |
1118 | } |
1119 | len = min_t(unsigned int, sizeof(int), len); | |
1120 | if(put_user(len, optlen)) | |
1121 | return -EFAULT; | |
1122 | if(copy_to_user(optval,&val,len)) | |
1123 | return -EFAULT; | |
1124 | return 0; | |
1125 | } | |
1126 | ||
3fdadf7d DM |
1127 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1128 | char __user *optval, int __user *optlen) | |
1129 | { | |
1130 | int err; | |
1131 | ||
1132 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
1133 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
1134 | ||
1135 | if(level != SOL_IPV6) | |
1136 | return -ENOPROTOOPT; | |
1137 | ||
1138 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); | |
1139 | #ifdef CONFIG_NETFILTER | |
cf6fc4a9 WY |
1140 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1141 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1142 | int len; |
1143 | ||
1144 | if (get_user(len, optlen)) | |
1145 | return -EFAULT; | |
1146 | ||
1147 | lock_sock(sk); | |
1148 | err = nf_getsockopt(sk, PF_INET6, optname, optval, | |
1149 | &len); | |
1150 | release_sock(sk); | |
1151 | if (err >= 0) | |
1152 | err = put_user(len, optlen); | |
1153 | } | |
1154 | #endif | |
1155 | return err; | |
1156 | } | |
1157 | ||
7159039a YH |
1158 | EXPORT_SYMBOL(ipv6_getsockopt); |
1159 | ||
3fdadf7d DM |
1160 | #ifdef CONFIG_COMPAT |
1161 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1162 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
1163 | { |
1164 | int err; | |
1165 | ||
1166 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
1167 | if (udp_prot.compat_getsockopt != NULL) |
1168 | return udp_prot.compat_getsockopt(sk, level, optname, | |
1169 | optval, optlen); | |
1170 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
1171 | } |
1172 | ||
543d9cfe | 1173 | if (level != SOL_IPV6) |
3fdadf7d DM |
1174 | return -ENOPROTOOPT; |
1175 | ||
80991790 PE |
1176 | if (optname == MCAST_MSFILTER) |
1177 | return compat_mc_getsockopt(sk, level, optname, optval, optlen, | |
1178 | ipv6_getsockopt); | |
1179 | ||
3fdadf7d DM |
1180 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); |
1181 | #ifdef CONFIG_NETFILTER | |
cf6fc4a9 WY |
1182 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1183 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1184 | int len; |
1185 | ||
1186 | if (get_user(len, optlen)) | |
1187 | return -EFAULT; | |
1188 | ||
1189 | lock_sock(sk); | |
543d9cfe ACM |
1190 | err = compat_nf_getsockopt(sk, PF_INET6, |
1191 | optname, optval, &len); | |
3fdadf7d DM |
1192 | release_sock(sk); |
1193 | if (err >= 0) | |
1194 | err = put_user(len, optlen); | |
1195 | } | |
1196 | #endif | |
1197 | return err; | |
1198 | } | |
543d9cfe ACM |
1199 | |
1200 | EXPORT_SYMBOL(compat_ipv6_getsockopt); | |
3fdadf7d DM |
1201 | #endif |
1202 |