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Commit | Line | Data |
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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> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
1da177e4 LT |
40 | |
41 | #include <net/sock.h> | |
42 | #include <net/snmp.h> | |
43 | #include <net/ipv6.h> | |
44 | #include <net/ndisc.h> | |
45 | #include <net/protocol.h> | |
46 | #include <net/transp_v6.h> | |
47 | #include <net/ip6_route.h> | |
48 | #include <net/addrconf.h> | |
49 | #include <net/inet_common.h> | |
50 | #include <net/tcp.h> | |
51 | #include <net/udp.h> | |
ba4e58ec | 52 | #include <net/udplite.h> |
1da177e4 | 53 | #include <net/xfrm.h> |
dae50295 | 54 | #include <net/compat.h> |
1da177e4 LT |
55 | |
56 | #include <asm/uaccess.h> | |
57 | ||
ba89966c | 58 | DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly; |
1da177e4 | 59 | |
1da177e4 LT |
60 | struct ip6_ra_chain *ip6_ra_chain; |
61 | DEFINE_RWLOCK(ip6_ra_lock); | |
62 | ||
725a8ff0 | 63 | int ip6_ra_control(struct sock *sk, int sel) |
1da177e4 LT |
64 | { |
65 | struct ip6_ra_chain *ra, *new_ra, **rap; | |
66 | ||
67 | /* RA packet may be delivered ONLY to IPPROTO_RAW socket */ | |
c720c7e8 | 68 | if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num != IPPROTO_RAW) |
1717699c | 69 | return -ENOPROTOOPT; |
1da177e4 LT |
70 | |
71 | new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; | |
72 | ||
73 | write_lock_bh(&ip6_ra_lock); | |
74 | for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) { | |
75 | if (ra->sk == sk) { | |
76 | if (sel>=0) { | |
77 | write_unlock_bh(&ip6_ra_lock); | |
a51482bd | 78 | kfree(new_ra); |
1da177e4 LT |
79 | return -EADDRINUSE; |
80 | } | |
81 | ||
82 | *rap = ra->next; | |
83 | write_unlock_bh(&ip6_ra_lock); | |
84 | ||
1da177e4 LT |
85 | sock_put(sk); |
86 | kfree(ra); | |
87 | return 0; | |
88 | } | |
89 | } | |
90 | if (new_ra == NULL) { | |
91 | write_unlock_bh(&ip6_ra_lock); | |
92 | return -ENOBUFS; | |
93 | } | |
94 | new_ra->sk = sk; | |
95 | new_ra->sel = sel; | |
1da177e4 LT |
96 | new_ra->next = ra; |
97 | *rap = new_ra; | |
98 | sock_hold(sk); | |
99 | write_unlock_bh(&ip6_ra_lock); | |
100 | return 0; | |
101 | } | |
102 | ||
e7712f1a YH |
103 | static |
104 | struct ipv6_txoptions *ipv6_update_options(struct sock *sk, | |
105 | struct ipv6_txoptions *opt) | |
106 | { | |
107 | if (inet_sk(sk)->is_icsk) { | |
108 | if (opt && | |
109 | !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) && | |
c720c7e8 | 110 | inet_sk(sk)->inet_daddr != LOOPBACK4_IPV6) { |
e7712f1a YH |
111 | struct inet_connection_sock *icsk = inet_csk(sk); |
112 | icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen; | |
113 | icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); | |
114 | } | |
115 | opt = xchg(&inet6_sk(sk)->opt, opt); | |
116 | } else { | |
117 | write_lock(&sk->sk_dst_lock); | |
118 | opt = xchg(&inet6_sk(sk)->opt, opt); | |
119 | write_unlock(&sk->sk_dst_lock); | |
120 | } | |
121 | sk_dst_reset(sk); | |
122 | ||
123 | return opt; | |
124 | } | |
125 | ||
3fdadf7d | 126 | static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 127 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
128 | { |
129 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 130 | struct net *net = sock_net(sk); |
1da177e4 LT |
131 | int val, valbool; |
132 | int retv = -ENOPROTOOPT; | |
133 | ||
1da177e4 LT |
134 | if (optval == NULL) |
135 | val=0; | |
b2a9d7c2 YH |
136 | else { |
137 | if (optlen >= sizeof(int)) { | |
138 | if (get_user(val, (int __user *) optval)) | |
139 | return -EFAULT; | |
140 | } else | |
141 | val = 0; | |
142 | } | |
1da177e4 LT |
143 | |
144 | valbool = (val!=0); | |
145 | ||
7bc570c8 YH |
146 | if (ip6_mroute_opt(optname)) |
147 | return ip6_mroute_setsockopt(sk, optname, optval, optlen); | |
148 | ||
1da177e4 LT |
149 | lock_sock(sk); |
150 | ||
151 | switch (optname) { | |
152 | ||
153 | case IPV6_ADDRFORM: | |
b2a9d7c2 YH |
154 | if (optlen < sizeof(int)) |
155 | goto e_inval; | |
1da177e4 LT |
156 | if (val == PF_INET) { |
157 | struct ipv6_txoptions *opt; | |
158 | struct sk_buff *pktopt; | |
159 | ||
49d074f4 DL |
160 | if (sk->sk_type == SOCK_RAW) |
161 | break; | |
162 | ||
9596cc82 DL |
163 | if (sk->sk_protocol == IPPROTO_UDP || |
164 | sk->sk_protocol == IPPROTO_UDPLITE) { | |
165 | struct udp_sock *up = udp_sk(sk); | |
166 | if (up->pending == AF_INET6) { | |
167 | retv = -EBUSY; | |
168 | break; | |
169 | } | |
170 | } else if (sk->sk_protocol != IPPROTO_TCP) | |
1da177e4 LT |
171 | break; |
172 | ||
173 | if (sk->sk_state != TCP_ESTABLISHED) { | |
174 | retv = -ENOTCONN; | |
175 | break; | |
176 | } | |
177 | ||
178 | if (ipv6_only_sock(sk) || | |
e773e4fa | 179 | !ipv6_addr_v4mapped(&np->daddr)) { |
1da177e4 LT |
180 | retv = -EADDRNOTAVAIL; |
181 | break; | |
182 | } | |
183 | ||
184 | fl6_free_socklist(sk); | |
185 | ipv6_sock_mc_close(sk); | |
186 | ||
e6848976 ACM |
187 | /* |
188 | * Sock is moving from IPv6 to IPv4 (sk_prot), so | |
189 | * remove it from the refcnt debug socks count in the | |
190 | * original family... | |
191 | */ | |
192 | sk_refcnt_debug_dec(sk); | |
193 | ||
1da177e4 | 194 | if (sk->sk_protocol == IPPROTO_TCP) { |
d83d8461 | 195 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 | 196 | local_bh_disable(); |
c29a0bc4 PE |
197 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
198 | sock_prot_inuse_add(net, &tcp_prot, 1); | |
1da177e4 LT |
199 | local_bh_enable(); |
200 | sk->sk_prot = &tcp_prot; | |
d83d8461 | 201 | icsk->icsk_af_ops = &ipv4_specific; |
1da177e4 LT |
202 | sk->sk_socket->ops = &inet_stream_ops; |
203 | sk->sk_family = PF_INET; | |
d83d8461 | 204 | tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); |
1da177e4 | 205 | } else { |
ba4e58ec GR |
206 | struct proto *prot = &udp_prot; |
207 | ||
db8dac20 | 208 | if (sk->sk_protocol == IPPROTO_UDPLITE) |
ba4e58ec | 209 | prot = &udplite_prot; |
1da177e4 | 210 | local_bh_disable(); |
c29a0bc4 PE |
211 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
212 | sock_prot_inuse_add(net, prot, 1); | |
1da177e4 | 213 | local_bh_enable(); |
ba4e58ec | 214 | sk->sk_prot = prot; |
1da177e4 LT |
215 | sk->sk_socket->ops = &inet_dgram_ops; |
216 | sk->sk_family = PF_INET; | |
217 | } | |
218 | opt = xchg(&np->opt, NULL); | |
219 | if (opt) | |
220 | sock_kfree_s(sk, opt, opt->tot_len); | |
221 | pktopt = xchg(&np->pktoptions, NULL); | |
800d55f1 | 222 | kfree_skb(pktopt); |
1da177e4 LT |
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 | 237 | if (optlen < sizeof(int) || |
c720c7e8 | 238 | inet_sk(sk)->inet_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 | 318 | goto e_inval; |
26ced1e4 GR |
319 | /* RFC 3542, 6.5: default traffic class of 0x0 */ |
320 | if (val == -1) | |
321 | val = 0; | |
41a1f8ea YH |
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; | |
aea7427f SW |
346 | |
347 | /* remove any sticky options header with a zero option | |
348 | * length, per RFC3542. | |
349 | */ | |
333fad53 | 350 | if (optlen == 0) |
cb422c46 | 351 | optval = NULL; |
cfb266c0 YH |
352 | else if (optval == NULL) |
353 | goto e_inval; | |
aea7427f SW |
354 | else if (optlen < sizeof(struct ipv6_opt_hdr) || |
355 | optlen & 0x7 || optlen > 8 * 255) | |
356 | goto e_inval; | |
333fad53 YH |
357 | |
358 | /* hop-by-hop / destination options are privileged option */ | |
359 | retv = -EPERM; | |
360 | if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW)) | |
361 | break; | |
362 | ||
333fad53 YH |
363 | opt = ipv6_renew_options(sk, np->opt, optname, |
364 | (struct ipv6_opt_hdr __user *)optval, | |
365 | optlen); | |
366 | if (IS_ERR(opt)) { | |
367 | retv = PTR_ERR(opt); | |
368 | break; | |
369 | } | |
370 | ||
371 | /* routing header option needs extra check */ | |
6e093d9d | 372 | retv = -EINVAL; |
dfee0a72 | 373 | if (optname == IPV6_RTHDR && opt && opt->srcrt) { |
333fad53 | 374 | struct ipv6_rt_hdr *rthdr = opt->srcrt; |
280a9d34 | 375 | switch (rthdr->type) { |
59fbb3a6 | 376 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
280a9d34 | 377 | case IPV6_SRCRT_TYPE_2: |
6e093d9d BH |
378 | if (rthdr->hdrlen != 2 || |
379 | rthdr->segments_left != 1) | |
380 | goto sticky_done; | |
381 | ||
280a9d34 | 382 | break; |
bb4dbf9e | 383 | #endif |
280a9d34 | 384 | default: |
333fad53 | 385 | goto sticky_done; |
280a9d34 | 386 | } |
333fad53 YH |
387 | } |
388 | ||
389 | retv = 0; | |
e7712f1a | 390 | opt = ipv6_update_options(sk, opt); |
333fad53 YH |
391 | sticky_done: |
392 | if (opt) | |
393 | sock_kfree_s(sk, opt, opt->tot_len); | |
394 | break; | |
395 | } | |
396 | ||
b24a2516 YH |
397 | case IPV6_PKTINFO: |
398 | { | |
399 | struct in6_pktinfo pkt; | |
400 | ||
401 | if (optlen == 0) | |
402 | goto e_inval; | |
403 | else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL) | |
404 | goto e_inval; | |
405 | ||
914d1164 | 406 | if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) { |
b24a2516 YH |
407 | retv = -EFAULT; |
408 | break; | |
409 | } | |
410 | if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if) | |
411 | goto e_inval; | |
412 | ||
413 | np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex; | |
414 | ipv6_addr_copy(&np->sticky_pktinfo.ipi6_addr, &pkt.ipi6_addr); | |
415 | retv = 0; | |
416 | break; | |
417 | } | |
418 | ||
333fad53 | 419 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
420 | { |
421 | struct ipv6_txoptions *opt = NULL; | |
422 | struct msghdr msg; | |
423 | struct flowi fl; | |
424 | int junk; | |
425 | ||
426 | fl.fl6_flowlabel = 0; | |
427 | fl.oif = sk->sk_bound_dev_if; | |
51953d5b | 428 | fl.mark = sk->sk_mark; |
1da177e4 LT |
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 | 500 | if (val) { |
55b80503 ED |
501 | struct net_device *dev; |
502 | ||
4953f0fc BH |
503 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) |
504 | goto e_inval; | |
505 | ||
55b80503 ED |
506 | dev = dev_get_by_index(net, val); |
507 | if (!dev) { | |
4953f0fc BH |
508 | retv = -ENODEV; |
509 | break; | |
510 | } | |
55b80503 | 511 | dev_put(dev); |
1da177e4 LT |
512 | } |
513 | np->mcast_oif = val; | |
514 | retv = 0; | |
515 | break; | |
516 | case IPV6_ADD_MEMBERSHIP: | |
517 | case IPV6_DROP_MEMBERSHIP: | |
518 | { | |
519 | struct ipv6_mreq mreq; | |
520 | ||
a28398ba WC |
521 | if (optlen < sizeof(struct ipv6_mreq)) |
522 | goto e_inval; | |
523 | ||
a96fb49b FL |
524 | retv = -EPROTO; |
525 | if (inet_sk(sk)->is_icsk) | |
526 | break; | |
527 | ||
1da177e4 LT |
528 | retv = -EFAULT; |
529 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
530 | break; | |
531 | ||
532 | if (optname == IPV6_ADD_MEMBERSHIP) | |
533 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
534 | else | |
535 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
536 | break; | |
537 | } | |
538 | case IPV6_JOIN_ANYCAST: | |
539 | case IPV6_LEAVE_ANYCAST: | |
540 | { | |
541 | struct ipv6_mreq mreq; | |
542 | ||
a28398ba | 543 | if (optlen < sizeof(struct ipv6_mreq)) |
1da177e4 LT |
544 | goto e_inval; |
545 | ||
546 | retv = -EFAULT; | |
547 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
548 | break; | |
549 | ||
550 | if (optname == IPV6_JOIN_ANYCAST) | |
551 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
552 | else | |
553 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
554 | break; | |
555 | } | |
556 | case MCAST_JOIN_GROUP: | |
557 | case MCAST_LEAVE_GROUP: | |
558 | { | |
559 | struct group_req greq; | |
560 | struct sockaddr_in6 *psin6; | |
561 | ||
a28398ba WC |
562 | if (optlen < sizeof(struct group_req)) |
563 | goto e_inval; | |
564 | ||
1da177e4 LT |
565 | retv = -EFAULT; |
566 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
567 | break; | |
568 | if (greq.gr_group.ss_family != AF_INET6) { | |
569 | retv = -EADDRNOTAVAIL; | |
570 | break; | |
571 | } | |
572 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
573 | if (optname == MCAST_JOIN_GROUP) | |
574 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, | |
575 | &psin6->sin6_addr); | |
576 | else | |
577 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, | |
578 | &psin6->sin6_addr); | |
579 | break; | |
580 | } | |
581 | case MCAST_JOIN_SOURCE_GROUP: | |
582 | case MCAST_LEAVE_SOURCE_GROUP: | |
583 | case MCAST_BLOCK_SOURCE: | |
584 | case MCAST_UNBLOCK_SOURCE: | |
585 | { | |
586 | struct group_source_req greqs; | |
587 | int omode, add; | |
588 | ||
a28398ba | 589 | if (optlen < sizeof(struct group_source_req)) |
1da177e4 LT |
590 | goto e_inval; |
591 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
592 | retv = -EFAULT; | |
593 | break; | |
594 | } | |
595 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
596 | greqs.gsr_source.ss_family != AF_INET6) { | |
597 | retv = -EADDRNOTAVAIL; | |
598 | break; | |
599 | } | |
600 | if (optname == MCAST_BLOCK_SOURCE) { | |
601 | omode = MCAST_EXCLUDE; | |
602 | add = 1; | |
603 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
604 | omode = MCAST_EXCLUDE; | |
605 | add = 0; | |
606 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
607 | struct sockaddr_in6 *psin6; | |
608 | ||
609 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
610 | retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, | |
611 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
612 | /* prior join w/ different source is ok */ |
613 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
614 | break; |
615 | omode = MCAST_INCLUDE; | |
616 | add = 1; | |
c9e3e8b6 | 617 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
618 | omode = MCAST_INCLUDE; |
619 | add = 0; | |
620 | } | |
621 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
622 | break; | |
623 | } | |
624 | case MCAST_MSFILTER: | |
625 | { | |
1da177e4 LT |
626 | extern int sysctl_mld_max_msf; |
627 | struct group_filter *gsf; | |
628 | ||
629 | if (optlen < GROUP_FILTER_SIZE(0)) | |
630 | goto e_inval; | |
631 | if (optlen > sysctl_optmem_max) { | |
632 | retv = -ENOBUFS; | |
633 | break; | |
634 | } | |
8b3a7005 | 635 | gsf = kmalloc(optlen,GFP_KERNEL); |
cfcabdcc | 636 | if (!gsf) { |
1da177e4 LT |
637 | retv = -ENOBUFS; |
638 | break; | |
639 | } | |
640 | retv = -EFAULT; | |
641 | if (copy_from_user(gsf, optval, optlen)) { | |
642 | kfree(gsf); | |
643 | break; | |
644 | } | |
645 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
646 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
647 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
648 | kfree(gsf); | |
649 | retv = -ENOBUFS; | |
650 | break; | |
651 | } | |
652 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
653 | kfree(gsf); | |
654 | retv = -EINVAL; | |
655 | break; | |
656 | } | |
657 | retv = ip6_mc_msfilter(sk, gsf); | |
658 | kfree(gsf); | |
659 | ||
660 | break; | |
661 | } | |
662 | case IPV6_ROUTER_ALERT: | |
b2a9d7c2 YH |
663 | if (optlen < sizeof(int)) |
664 | goto e_inval; | |
725a8ff0 | 665 | retv = ip6_ra_control(sk, val); |
1da177e4 LT |
666 | break; |
667 | case IPV6_MTU_DISCOVER: | |
b2a9d7c2 YH |
668 | if (optlen < sizeof(int)) |
669 | goto e_inval; | |
0eae750e | 670 | if (val < IP_PMTUDISC_DONT || val > IP_PMTUDISC_PROBE) |
1da177e4 LT |
671 | goto e_inval; |
672 | np->pmtudisc = val; | |
673 | retv = 0; | |
674 | break; | |
675 | case IPV6_MTU: | |
b2a9d7c2 YH |
676 | if (optlen < sizeof(int)) |
677 | goto e_inval; | |
1da177e4 LT |
678 | if (val && val < IPV6_MIN_MTU) |
679 | goto e_inval; | |
680 | np->frag_size = val; | |
681 | retv = 0; | |
682 | break; | |
683 | case IPV6_RECVERR: | |
b2a9d7c2 YH |
684 | if (optlen < sizeof(int)) |
685 | goto e_inval; | |
1da177e4 LT |
686 | np->recverr = valbool; |
687 | if (!val) | |
688 | skb_queue_purge(&sk->sk_error_queue); | |
689 | retv = 0; | |
690 | break; | |
691 | case IPV6_FLOWINFO_SEND: | |
b2a9d7c2 YH |
692 | if (optlen < sizeof(int)) |
693 | goto e_inval; | |
1da177e4 LT |
694 | np->sndflow = valbool; |
695 | retv = 0; | |
696 | break; | |
697 | case IPV6_FLOWLABEL_MGR: | |
698 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
699 | break; | |
700 | case IPV6_IPSEC_POLICY: | |
701 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 HX |
702 | retv = -EPERM; |
703 | if (!capable(CAP_NET_ADMIN)) | |
704 | break; | |
1da177e4 LT |
705 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
706 | break; | |
707 | ||
7cbca67c YH |
708 | case IPV6_ADDR_PREFERENCES: |
709 | { | |
710 | unsigned int pref = 0; | |
711 | unsigned int prefmask = ~0; | |
712 | ||
b2a9d7c2 YH |
713 | if (optlen < sizeof(int)) |
714 | goto e_inval; | |
715 | ||
7cbca67c YH |
716 | retv = -EINVAL; |
717 | ||
718 | /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ | |
719 | switch (val & (IPV6_PREFER_SRC_PUBLIC| | |
720 | IPV6_PREFER_SRC_TMP| | |
721 | IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { | |
722 | case IPV6_PREFER_SRC_PUBLIC: | |
723 | pref |= IPV6_PREFER_SRC_PUBLIC; | |
724 | break; | |
725 | case IPV6_PREFER_SRC_TMP: | |
726 | pref |= IPV6_PREFER_SRC_TMP; | |
727 | break; | |
728 | case IPV6_PREFER_SRC_PUBTMP_DEFAULT: | |
729 | break; | |
730 | case 0: | |
731 | goto pref_skip_pubtmp; | |
732 | default: | |
733 | goto e_inval; | |
734 | } | |
735 | ||
736 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| | |
737 | IPV6_PREFER_SRC_TMP); | |
738 | pref_skip_pubtmp: | |
739 | ||
740 | /* check HOME/COA conflicts */ | |
741 | switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { | |
742 | case IPV6_PREFER_SRC_HOME: | |
743 | break; | |
744 | case IPV6_PREFER_SRC_COA: | |
745 | pref |= IPV6_PREFER_SRC_COA; | |
746 | case 0: | |
747 | goto pref_skip_coa; | |
748 | default: | |
749 | goto e_inval; | |
750 | } | |
751 | ||
752 | prefmask &= ~IPV6_PREFER_SRC_COA; | |
753 | pref_skip_coa: | |
754 | ||
755 | /* check CGA/NONCGA conflicts */ | |
756 | switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { | |
757 | case IPV6_PREFER_SRC_CGA: | |
758 | case IPV6_PREFER_SRC_NONCGA: | |
759 | case 0: | |
760 | break; | |
761 | default: | |
762 | goto e_inval; | |
763 | } | |
764 | ||
765 | np->srcprefs = (np->srcprefs & prefmask) | pref; | |
766 | retv = 0; | |
767 | ||
768 | break; | |
769 | } | |
1da177e4 | 770 | } |
7cbca67c | 771 | |
1da177e4 LT |
772 | release_sock(sk); |
773 | ||
1da177e4 LT |
774 | return retv; |
775 | ||
776 | e_inval: | |
777 | release_sock(sk); | |
778 | return -EINVAL; | |
779 | } | |
780 | ||
3fdadf7d | 781 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 782 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
783 | { |
784 | int err; | |
785 | ||
786 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
787 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
788 | ||
789 | if (level != SOL_IPV6) | |
790 | return -ENOPROTOOPT; | |
791 | ||
792 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
793 | #ifdef CONFIG_NETFILTER | |
794 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
795 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
796 | optname != IPV6_XFRM_POLICY) { | |
797 | lock_sock(sk); | |
798 | err = nf_setsockopt(sk, PF_INET6, optname, optval, | |
799 | optlen); | |
800 | release_sock(sk); | |
801 | } | |
802 | #endif | |
803 | return err; | |
804 | } | |
805 | ||
7159039a | 806 | EXPORT_SYMBOL(ipv6_setsockopt); |
3fdadf7d DM |
807 | |
808 | #ifdef CONFIG_COMPAT | |
809 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
b7058842 | 810 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
811 | { |
812 | int err; | |
813 | ||
814 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
815 | if (udp_prot.compat_setsockopt != NULL) |
816 | return udp_prot.compat_setsockopt(sk, level, optname, | |
817 | optval, optlen); | |
818 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
819 | } |
820 | ||
821 | if (level != SOL_IPV6) | |
822 | return -ENOPROTOOPT; | |
823 | ||
dae50295 DS |
824 | if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) |
825 | return compat_mc_setsockopt(sk, level, optname, optval, optlen, | |
826 | ipv6_setsockopt); | |
827 | ||
3fdadf7d DM |
828 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); |
829 | #ifdef CONFIG_NETFILTER | |
830 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
831 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
543d9cfe | 832 | optname != IPV6_XFRM_POLICY) { |
3fdadf7d | 833 | lock_sock(sk); |
543d9cfe ACM |
834 | err = compat_nf_setsockopt(sk, PF_INET6, optname, |
835 | optval, optlen); | |
3fdadf7d DM |
836 | release_sock(sk); |
837 | } | |
838 | #endif | |
839 | return err; | |
840 | } | |
543d9cfe ACM |
841 | |
842 | EXPORT_SYMBOL(compat_ipv6_setsockopt); | |
3fdadf7d DM |
843 | #endif |
844 | ||
28693079 | 845 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, |
4c6510a7 | 846 | int optname, char __user *optval, int len) |
333fad53 | 847 | { |
28693079 DM |
848 | struct ipv6_opt_hdr *hdr; |
849 | ||
4c6510a7 YH |
850 | if (!opt) |
851 | return 0; | |
852 | ||
853 | switch(optname) { | |
854 | case IPV6_HOPOPTS: | |
855 | hdr = opt->hopopt; | |
856 | break; | |
857 | case IPV6_RTHDRDSTOPTS: | |
858 | hdr = opt->dst0opt; | |
859 | break; | |
860 | case IPV6_RTHDR: | |
861 | hdr = (struct ipv6_opt_hdr *)opt->srcrt; | |
862 | break; | |
863 | case IPV6_DSTOPTS: | |
864 | hdr = opt->dst1opt; | |
865 | break; | |
866 | default: | |
867 | return -EINVAL; /* should not happen */ | |
868 | } | |
869 | ||
870 | if (!hdr) | |
333fad53 | 871 | return 0; |
28693079 | 872 | |
d2b02ed9 | 873 | len = min_t(unsigned int, len, ipv6_optlen(hdr)); |
660adc6e | 874 | if (copy_to_user(optval, hdr, len)) |
333fad53 | 875 | return -EFAULT; |
95b496b6 | 876 | return len; |
333fad53 YH |
877 | } |
878 | ||
3fdadf7d | 879 | static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
880 | char __user *optval, int __user *optlen) |
881 | { | |
882 | struct ipv6_pinfo *np = inet6_sk(sk); | |
883 | int len; | |
884 | int val; | |
885 | ||
7bc570c8 YH |
886 | if (ip6_mroute_opt(optname)) |
887 | return ip6_mroute_getsockopt(sk, optname, optval, optlen); | |
888 | ||
1da177e4 LT |
889 | if (get_user(len, optlen)) |
890 | return -EFAULT; | |
891 | switch (optname) { | |
892 | case IPV6_ADDRFORM: | |
893 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 894 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 | 895 | sk->sk_protocol != IPPROTO_TCP) |
1717699c | 896 | return -ENOPROTOOPT; |
1da177e4 LT |
897 | if (sk->sk_state != TCP_ESTABLISHED) |
898 | return -ENOTCONN; | |
899 | val = sk->sk_family; | |
900 | break; | |
901 | case MCAST_MSFILTER: | |
902 | { | |
903 | struct group_filter gsf; | |
904 | int err; | |
905 | ||
906 | if (len < GROUP_FILTER_SIZE(0)) | |
907 | return -EINVAL; | |
908 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
909 | return -EFAULT; | |
20c61fbd YH |
910 | if (gsf.gf_group.ss_family != AF_INET6) |
911 | return -EADDRNOTAVAIL; | |
1da177e4 LT |
912 | lock_sock(sk); |
913 | err = ip6_mc_msfget(sk, &gsf, | |
914 | (struct group_filter __user *)optval, optlen); | |
915 | release_sock(sk); | |
916 | return err; | |
917 | } | |
918 | ||
333fad53 | 919 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
920 | { |
921 | struct msghdr msg; | |
922 | struct sk_buff *skb; | |
923 | ||
924 | if (sk->sk_type != SOCK_STREAM) | |
925 | return -ENOPROTOOPT; | |
926 | ||
927 | msg.msg_control = optval; | |
928 | msg.msg_controllen = len; | |
929 | msg.msg_flags = 0; | |
930 | ||
931 | lock_sock(sk); | |
932 | skb = np->pktoptions; | |
933 | if (skb) | |
934 | atomic_inc(&skb->users); | |
935 | release_sock(sk); | |
936 | ||
937 | if (skb) { | |
938 | int err = datagram_recv_ctl(sk, &msg, skb); | |
939 | kfree_skb(skb); | |
940 | if (err) | |
941 | return err; | |
942 | } else { | |
943 | if (np->rxopt.bits.rxinfo) { | |
944 | struct in6_pktinfo src_info; | |
f250dcda YH |
945 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
946 | np->sticky_pktinfo.ipi6_ifindex; | |
947 | np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) : | |
948 | ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr)); | |
1da177e4 LT |
949 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); |
950 | } | |
951 | if (np->rxopt.bits.rxhlim) { | |
952 | int hlim = np->mcast_hops; | |
953 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
954 | } | |
333fad53 YH |
955 | if (np->rxopt.bits.rxoinfo) { |
956 | struct in6_pktinfo src_info; | |
f250dcda YH |
957 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
958 | np->sticky_pktinfo.ipi6_ifindex; | |
959 | np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) : | |
960 | ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr)); | |
333fad53 YH |
961 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); |
962 | } | |
963 | if (np->rxopt.bits.rxohlim) { | |
964 | int hlim = np->mcast_hops; | |
965 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
966 | } | |
1da177e4 LT |
967 | } |
968 | len -= msg.msg_controllen; | |
969 | return put_user(len, optlen); | |
970 | } | |
971 | case IPV6_MTU: | |
972 | { | |
973 | struct dst_entry *dst; | |
1ab1457c | 974 | val = 0; |
1da177e4 LT |
975 | lock_sock(sk); |
976 | dst = sk_dst_get(sk); | |
977 | if (dst) { | |
978 | val = dst_mtu(dst); | |
979 | dst_release(dst); | |
980 | } | |
981 | release_sock(sk); | |
982 | if (!val) | |
983 | return -ENOTCONN; | |
984 | break; | |
985 | } | |
986 | ||
987 | case IPV6_V6ONLY: | |
988 | val = np->ipv6only; | |
989 | break; | |
990 | ||
333fad53 | 991 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
992 | val = np->rxopt.bits.rxinfo; |
993 | break; | |
994 | ||
333fad53 YH |
995 | case IPV6_2292PKTINFO: |
996 | val = np->rxopt.bits.rxoinfo; | |
997 | break; | |
998 | ||
999 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
1000 | val = np->rxopt.bits.rxhlim; |
1001 | break; | |
1002 | ||
333fad53 YH |
1003 | case IPV6_2292HOPLIMIT: |
1004 | val = np->rxopt.bits.rxohlim; | |
1005 | break; | |
1006 | ||
1007 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
1008 | val = np->rxopt.bits.srcrt; |
1009 | break; | |
1010 | ||
333fad53 YH |
1011 | case IPV6_2292RTHDR: |
1012 | val = np->rxopt.bits.osrcrt; | |
1013 | break; | |
1014 | ||
1da177e4 | 1015 | case IPV6_HOPOPTS: |
333fad53 YH |
1016 | case IPV6_RTHDRDSTOPTS: |
1017 | case IPV6_RTHDR: | |
1018 | case IPV6_DSTOPTS: | |
1019 | { | |
1020 | ||
1021 | lock_sock(sk); | |
28693079 | 1022 | len = ipv6_getsockopt_sticky(sk, np->opt, |
4c6510a7 | 1023 | optname, optval, len); |
333fad53 | 1024 | release_sock(sk); |
05335c22 YH |
1025 | /* check if ipv6_getsockopt_sticky() returns err code */ |
1026 | if (len < 0) | |
1027 | return len; | |
333fad53 YH |
1028 | return put_user(len, optlen); |
1029 | } | |
1030 | ||
1031 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
1032 | val = np->rxopt.bits.hopopts; |
1033 | break; | |
1034 | ||
333fad53 YH |
1035 | case IPV6_2292HOPOPTS: |
1036 | val = np->rxopt.bits.ohopopts; | |
1037 | break; | |
1038 | ||
1039 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
1040 | val = np->rxopt.bits.dstopts; |
1041 | break; | |
1042 | ||
333fad53 YH |
1043 | case IPV6_2292DSTOPTS: |
1044 | val = np->rxopt.bits.odstopts; | |
1045 | break; | |
1046 | ||
41a1f8ea YH |
1047 | case IPV6_TCLASS: |
1048 | val = np->tclass; | |
1049 | break; | |
1050 | ||
1051 | case IPV6_RECVTCLASS: | |
1052 | val = np->rxopt.bits.rxtclass; | |
1053 | break; | |
1054 | ||
1da177e4 LT |
1055 | case IPV6_FLOWINFO: |
1056 | val = np->rxopt.bits.rxflow; | |
1057 | break; | |
1058 | ||
1059 | case IPV6_UNICAST_HOPS: | |
1da177e4 | 1060 | case IPV6_MULTICAST_HOPS: |
befffe90 BH |
1061 | { |
1062 | struct dst_entry *dst; | |
1063 | ||
1064 | if (optname == IPV6_UNICAST_HOPS) | |
1065 | val = np->hop_limit; | |
1066 | else | |
1067 | val = np->mcast_hops; | |
1068 | ||
1069 | dst = sk_dst_get(sk); | |
1070 | if (dst) { | |
1071 | if (val < 0) | |
6b75d090 | 1072 | val = ip6_dst_hoplimit(dst); |
befffe90 BH |
1073 | dst_release(dst); |
1074 | } | |
1075 | if (val < 0) | |
53b7997f | 1076 | val = sock_net(sk)->ipv6.devconf_all->hop_limit; |
1da177e4 | 1077 | break; |
befffe90 | 1078 | } |
1da177e4 LT |
1079 | |
1080 | case IPV6_MULTICAST_LOOP: | |
1081 | val = np->mc_loop; | |
1082 | break; | |
1083 | ||
1084 | case IPV6_MULTICAST_IF: | |
1085 | val = np->mcast_oif; | |
1086 | break; | |
1087 | ||
1088 | case IPV6_MTU_DISCOVER: | |
1089 | val = np->pmtudisc; | |
1090 | break; | |
1091 | ||
1092 | case IPV6_RECVERR: | |
1093 | val = np->recverr; | |
1094 | break; | |
1095 | ||
1096 | case IPV6_FLOWINFO_SEND: | |
1097 | val = np->sndflow; | |
1098 | break; | |
1099 | ||
7cbca67c YH |
1100 | case IPV6_ADDR_PREFERENCES: |
1101 | val = 0; | |
1102 | ||
1103 | if (np->srcprefs & IPV6_PREFER_SRC_TMP) | |
1104 | val |= IPV6_PREFER_SRC_TMP; | |
1105 | else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) | |
1106 | val |= IPV6_PREFER_SRC_PUBLIC; | |
1107 | else { | |
1108 | /* XXX: should we return system default? */ | |
1109 | val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; | |
1110 | } | |
1111 | ||
1112 | if (np->srcprefs & IPV6_PREFER_SRC_COA) | |
1113 | val |= IPV6_PREFER_SRC_COA; | |
1114 | else | |
1115 | val |= IPV6_PREFER_SRC_HOME; | |
1116 | break; | |
1117 | ||
1da177e4 | 1118 | default: |
cf6fc4a9 | 1119 | return -ENOPROTOOPT; |
1da177e4 LT |
1120 | } |
1121 | len = min_t(unsigned int, sizeof(int), len); | |
1122 | if(put_user(len, optlen)) | |
1123 | return -EFAULT; | |
1124 | if(copy_to_user(optval,&val,len)) | |
1125 | return -EFAULT; | |
1126 | return 0; | |
1127 | } | |
1128 | ||
3fdadf7d DM |
1129 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1130 | char __user *optval, int __user *optlen) | |
1131 | { | |
1132 | int err; | |
1133 | ||
1134 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
1135 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
1136 | ||
1137 | if(level != SOL_IPV6) | |
1138 | return -ENOPROTOOPT; | |
1139 | ||
1140 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); | |
1141 | #ifdef CONFIG_NETFILTER | |
cf6fc4a9 WY |
1142 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1143 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1144 | int len; |
1145 | ||
1146 | if (get_user(len, optlen)) | |
1147 | return -EFAULT; | |
1148 | ||
1149 | lock_sock(sk); | |
1150 | err = nf_getsockopt(sk, PF_INET6, optname, optval, | |
1151 | &len); | |
1152 | release_sock(sk); | |
1153 | if (err >= 0) | |
1154 | err = put_user(len, optlen); | |
1155 | } | |
1156 | #endif | |
1157 | return err; | |
1158 | } | |
1159 | ||
7159039a YH |
1160 | EXPORT_SYMBOL(ipv6_getsockopt); |
1161 | ||
3fdadf7d DM |
1162 | #ifdef CONFIG_COMPAT |
1163 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1164 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
1165 | { |
1166 | int err; | |
1167 | ||
1168 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
1169 | if (udp_prot.compat_getsockopt != NULL) |
1170 | return udp_prot.compat_getsockopt(sk, level, optname, | |
1171 | optval, optlen); | |
1172 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
1173 | } |
1174 | ||
543d9cfe | 1175 | if (level != SOL_IPV6) |
3fdadf7d DM |
1176 | return -ENOPROTOOPT; |
1177 | ||
80991790 PE |
1178 | if (optname == MCAST_MSFILTER) |
1179 | return compat_mc_getsockopt(sk, level, optname, optval, optlen, | |
1180 | ipv6_getsockopt); | |
1181 | ||
3fdadf7d DM |
1182 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); |
1183 | #ifdef CONFIG_NETFILTER | |
cf6fc4a9 WY |
1184 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1185 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1186 | int len; |
1187 | ||
1188 | if (get_user(len, optlen)) | |
1189 | return -EFAULT; | |
1190 | ||
1191 | lock_sock(sk); | |
543d9cfe ACM |
1192 | err = compat_nf_getsockopt(sk, PF_INET6, |
1193 | optname, optval, &len); | |
3fdadf7d DM |
1194 | release_sock(sk); |
1195 | if (err >= 0) | |
1196 | err = put_user(len, optlen); | |
1197 | } | |
1198 | #endif | |
1199 | return err; | |
1200 | } | |
543d9cfe ACM |
1201 | |
1202 | EXPORT_SYMBOL(compat_ipv6_getsockopt); | |
3fdadf7d DM |
1203 | #endif |
1204 |