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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> |
a149e7c7 | 55 | #include <net/seg6.h> |
1da177e4 | 56 | |
7c0f6ba6 | 57 | #include <linux/uaccess.h> |
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 */ | |
c720c7e8 | 67 | if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num != IPPROTO_RAW) |
1717699c | 68 | return -ENOPROTOOPT; |
1da177e4 | 69 | |
67ba4152 | 70 | new_ra = (sel >= 0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; |
1da177e4 LT |
71 | |
72 | write_lock_bh(&ip6_ra_lock); | |
67ba4152 | 73 | for (rap = &ip6_ra_chain; (ra = *rap) != NULL; rap = &ra->next) { |
1da177e4 | 74 | if (ra->sk == sk) { |
67ba4152 | 75 | if (sel >= 0) { |
1da177e4 | 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 | } | |
63159f29 | 89 | if (!new_ra) { |
1da177e4 LT |
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 | struct ipv6_txoptions *ipv6_update_options(struct sock *sk, |
103 | struct ipv6_txoptions *opt) | |
104 | { | |
105 | if (inet_sk(sk)->is_icsk) { | |
106 | if (opt && | |
107 | !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) && | |
c720c7e8 | 108 | inet_sk(sk)->inet_daddr != LOOPBACK4_IPV6) { |
e7712f1a YH |
109 | struct inet_connection_sock *icsk = inet_csk(sk); |
110 | icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen; | |
111 | icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); | |
112 | } | |
e7712f1a | 113 | } |
45f6fad8 ED |
114 | opt = xchg((__force struct ipv6_txoptions **)&inet6_sk(sk)->opt, |
115 | opt); | |
e7712f1a YH |
116 | sk_dst_reset(sk); |
117 | ||
118 | return opt; | |
119 | } | |
120 | ||
baf606d9 MRL |
121 | static bool setsockopt_needs_rtnl(int optname) |
122 | { | |
123 | switch (optname) { | |
8651be8f | 124 | case IPV6_ADDRFORM: |
baf606d9 MRL |
125 | case IPV6_ADD_MEMBERSHIP: |
126 | case IPV6_DROP_MEMBERSHIP: | |
c4a6853d MRL |
127 | case IPV6_JOIN_ANYCAST: |
128 | case IPV6_LEAVE_ANYCAST: | |
baf606d9 MRL |
129 | case MCAST_JOIN_GROUP: |
130 | case MCAST_LEAVE_GROUP: | |
54ff9ef3 MRL |
131 | case MCAST_JOIN_SOURCE_GROUP: |
132 | case MCAST_LEAVE_SOURCE_GROUP: | |
133 | case MCAST_BLOCK_SOURCE: | |
134 | case MCAST_UNBLOCK_SOURCE: | |
135 | case MCAST_MSFILTER: | |
baf606d9 MRL |
136 | return true; |
137 | } | |
138 | return false; | |
139 | } | |
140 | ||
3fdadf7d | 141 | static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 142 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
143 | { |
144 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 145 | struct net *net = sock_net(sk); |
1da177e4 LT |
146 | int val, valbool; |
147 | int retv = -ENOPROTOOPT; | |
baf606d9 | 148 | bool needs_rtnl = setsockopt_needs_rtnl(optname); |
1da177e4 | 149 | |
63159f29 | 150 | if (!optval) |
67ba4152 | 151 | val = 0; |
b2a9d7c2 YH |
152 | else { |
153 | if (optlen >= sizeof(int)) { | |
154 | if (get_user(val, (int __user *) optval)) | |
155 | return -EFAULT; | |
156 | } else | |
157 | val = 0; | |
158 | } | |
1da177e4 | 159 | |
67ba4152 | 160 | valbool = (val != 0); |
1da177e4 | 161 | |
7bc570c8 YH |
162 | if (ip6_mroute_opt(optname)) |
163 | return ip6_mroute_setsockopt(sk, optname, optval, optlen); | |
164 | ||
baf606d9 MRL |
165 | if (needs_rtnl) |
166 | rtnl_lock(); | |
1da177e4 LT |
167 | lock_sock(sk); |
168 | ||
169 | switch (optname) { | |
170 | ||
171 | case IPV6_ADDRFORM: | |
b2a9d7c2 YH |
172 | if (optlen < sizeof(int)) |
173 | goto e_inval; | |
1da177e4 LT |
174 | if (val == PF_INET) { |
175 | struct ipv6_txoptions *opt; | |
176 | struct sk_buff *pktopt; | |
177 | ||
49d074f4 DL |
178 | if (sk->sk_type == SOCK_RAW) |
179 | break; | |
180 | ||
9596cc82 DL |
181 | if (sk->sk_protocol == IPPROTO_UDP || |
182 | sk->sk_protocol == IPPROTO_UDPLITE) { | |
183 | struct udp_sock *up = udp_sk(sk); | |
184 | if (up->pending == AF_INET6) { | |
185 | retv = -EBUSY; | |
186 | break; | |
187 | } | |
188 | } else if (sk->sk_protocol != IPPROTO_TCP) | |
1da177e4 LT |
189 | break; |
190 | ||
191 | if (sk->sk_state != TCP_ESTABLISHED) { | |
192 | retv = -ENOTCONN; | |
193 | break; | |
194 | } | |
195 | ||
196 | if (ipv6_only_sock(sk) || | |
efe4208f | 197 | !ipv6_addr_v4mapped(&sk->sk_v6_daddr)) { |
1da177e4 LT |
198 | retv = -EADDRNOTAVAIL; |
199 | break; | |
200 | } | |
201 | ||
202 | fl6_free_socklist(sk); | |
8651be8f | 203 | __ipv6_sock_mc_close(sk); |
1da177e4 | 204 | |
e6848976 ACM |
205 | /* |
206 | * Sock is moving from IPv6 to IPv4 (sk_prot), so | |
207 | * remove it from the refcnt debug socks count in the | |
208 | * original family... | |
209 | */ | |
210 | sk_refcnt_debug_dec(sk); | |
211 | ||
1da177e4 | 212 | if (sk->sk_protocol == IPPROTO_TCP) { |
d83d8461 | 213 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 | 214 | local_bh_disable(); |
c29a0bc4 PE |
215 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
216 | sock_prot_inuse_add(net, &tcp_prot, 1); | |
1da177e4 LT |
217 | local_bh_enable(); |
218 | sk->sk_prot = &tcp_prot; | |
d83d8461 | 219 | icsk->icsk_af_ops = &ipv4_specific; |
1da177e4 LT |
220 | sk->sk_socket->ops = &inet_stream_ops; |
221 | sk->sk_family = PF_INET; | |
d83d8461 | 222 | tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); |
1da177e4 | 223 | } else { |
ba4e58ec GR |
224 | struct proto *prot = &udp_prot; |
225 | ||
db8dac20 | 226 | if (sk->sk_protocol == IPPROTO_UDPLITE) |
ba4e58ec | 227 | prot = &udplite_prot; |
1da177e4 | 228 | local_bh_disable(); |
c29a0bc4 PE |
229 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
230 | sock_prot_inuse_add(net, prot, 1); | |
1da177e4 | 231 | local_bh_enable(); |
ba4e58ec | 232 | sk->sk_prot = prot; |
1da177e4 LT |
233 | sk->sk_socket->ops = &inet_dgram_ops; |
234 | sk->sk_family = PF_INET; | |
235 | } | |
45f6fad8 ED |
236 | opt = xchg((__force struct ipv6_txoptions **)&np->opt, |
237 | NULL); | |
238 | if (opt) { | |
239 | atomic_sub(opt->tot_len, &sk->sk_omem_alloc); | |
240 | txopt_put(opt); | |
241 | } | |
1da177e4 | 242 | pktopt = xchg(&np->pktoptions, NULL); |
800d55f1 | 243 | kfree_skb(pktopt); |
1da177e4 | 244 | |
e6848976 ACM |
245 | /* |
246 | * ... and add it to the refcnt debug socks count | |
247 | * in the new family. -acme | |
248 | */ | |
249 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
250 | module_put(THIS_MODULE); |
251 | retv = 0; | |
252 | break; | |
253 | } | |
254 | goto e_inval; | |
255 | ||
256 | case IPV6_V6ONLY: | |
b2a9d7c2 | 257 | if (optlen < sizeof(int) || |
c720c7e8 | 258 | inet_sk(sk)->inet_num) |
1da177e4 | 259 | goto e_inval; |
9fe516ba | 260 | sk->sk_ipv6only = valbool; |
1da177e4 LT |
261 | retv = 0; |
262 | break; | |
263 | ||
333fad53 | 264 | case IPV6_RECVPKTINFO: |
b2a9d7c2 YH |
265 | if (optlen < sizeof(int)) |
266 | goto e_inval; | |
1da177e4 LT |
267 | np->rxopt.bits.rxinfo = valbool; |
268 | retv = 0; | |
269 | break; | |
1ab1457c | 270 | |
333fad53 | 271 | case IPV6_2292PKTINFO: |
b2a9d7c2 YH |
272 | if (optlen < sizeof(int)) |
273 | goto e_inval; | |
333fad53 YH |
274 | np->rxopt.bits.rxoinfo = valbool; |
275 | retv = 0; | |
276 | break; | |
1da177e4 | 277 | |
333fad53 | 278 | case IPV6_RECVHOPLIMIT: |
b2a9d7c2 YH |
279 | if (optlen < sizeof(int)) |
280 | goto e_inval; | |
1da177e4 LT |
281 | np->rxopt.bits.rxhlim = valbool; |
282 | retv = 0; | |
283 | break; | |
284 | ||
333fad53 | 285 | case IPV6_2292HOPLIMIT: |
b2a9d7c2 YH |
286 | if (optlen < sizeof(int)) |
287 | goto e_inval; | |
333fad53 YH |
288 | np->rxopt.bits.rxohlim = valbool; |
289 | retv = 0; | |
290 | break; | |
291 | ||
292 | case IPV6_RECVRTHDR: | |
b2a9d7c2 YH |
293 | if (optlen < sizeof(int)) |
294 | goto e_inval; | |
4c752098 | 295 | np->rxopt.bits.srcrt = valbool; |
1da177e4 LT |
296 | retv = 0; |
297 | break; | |
298 | ||
333fad53 | 299 | case IPV6_2292RTHDR: |
b2a9d7c2 YH |
300 | if (optlen < sizeof(int)) |
301 | goto e_inval; | |
4c752098 | 302 | np->rxopt.bits.osrcrt = valbool; |
333fad53 YH |
303 | retv = 0; |
304 | break; | |
305 | ||
306 | case IPV6_RECVHOPOPTS: | |
b2a9d7c2 YH |
307 | if (optlen < sizeof(int)) |
308 | goto e_inval; | |
1da177e4 LT |
309 | np->rxopt.bits.hopopts = valbool; |
310 | retv = 0; | |
311 | break; | |
312 | ||
333fad53 | 313 | case IPV6_2292HOPOPTS: |
b2a9d7c2 YH |
314 | if (optlen < sizeof(int)) |
315 | goto e_inval; | |
333fad53 YH |
316 | np->rxopt.bits.ohopopts = valbool; |
317 | retv = 0; | |
318 | break; | |
319 | ||
320 | case IPV6_RECVDSTOPTS: | |
b2a9d7c2 YH |
321 | if (optlen < sizeof(int)) |
322 | goto e_inval; | |
1da177e4 LT |
323 | np->rxopt.bits.dstopts = valbool; |
324 | retv = 0; | |
325 | break; | |
326 | ||
333fad53 | 327 | case IPV6_2292DSTOPTS: |
b2a9d7c2 YH |
328 | if (optlen < sizeof(int)) |
329 | goto e_inval; | |
333fad53 YH |
330 | np->rxopt.bits.odstopts = valbool; |
331 | retv = 0; | |
332 | break; | |
333 | ||
41a1f8ea | 334 | case IPV6_TCLASS: |
b2a9d7c2 YH |
335 | if (optlen < sizeof(int)) |
336 | goto e_inval; | |
d0ee011f | 337 | if (val < -1 || val > 0xff) |
41a1f8ea | 338 | goto e_inval; |
26ced1e4 GR |
339 | /* RFC 3542, 6.5: default traffic class of 0x0 */ |
340 | if (val == -1) | |
341 | val = 0; | |
41a1f8ea YH |
342 | np->tclass = val; |
343 | retv = 0; | |
344 | break; | |
1ab1457c | 345 | |
41a1f8ea | 346 | case IPV6_RECVTCLASS: |
b2a9d7c2 YH |
347 | if (optlen < sizeof(int)) |
348 | goto e_inval; | |
41a1f8ea YH |
349 | np->rxopt.bits.rxtclass = valbool; |
350 | retv = 0; | |
351 | break; | |
352 | ||
1da177e4 | 353 | case IPV6_FLOWINFO: |
b2a9d7c2 YH |
354 | if (optlen < sizeof(int)) |
355 | goto e_inval; | |
1da177e4 LT |
356 | np->rxopt.bits.rxflow = valbool; |
357 | retv = 0; | |
358 | break; | |
359 | ||
793b1473 BH |
360 | case IPV6_RECVPATHMTU: |
361 | if (optlen < sizeof(int)) | |
362 | goto e_inval; | |
363 | np->rxopt.bits.rxpmtu = valbool; | |
364 | retv = 0; | |
365 | break; | |
366 | ||
6c468622 | 367 | case IPV6_TRANSPARENT: |
af31f412 EB |
368 | if (valbool && !ns_capable(net->user_ns, CAP_NET_ADMIN) && |
369 | !ns_capable(net->user_ns, CAP_NET_RAW)) { | |
b889416b BS |
370 | retv = -EPERM; |
371 | break; | |
372 | } | |
6c468622 BS |
373 | if (optlen < sizeof(int)) |
374 | goto e_inval; | |
375 | /* we don't have a separate transparent bit for IPV6 we use the one in the IPv4 socket */ | |
376 | inet_sk(sk)->transparent = valbool; | |
377 | retv = 0; | |
378 | break; | |
379 | ||
84e14fe3 MÅ» |
380 | case IPV6_FREEBIND: |
381 | if (optlen < sizeof(int)) | |
382 | goto e_inval; | |
383 | /* we also don't have a separate freebind bit for IPV6 */ | |
384 | inet_sk(sk)->freebind = valbool; | |
385 | retv = 0; | |
386 | break; | |
387 | ||
6c468622 BS |
388 | case IPV6_RECVORIGDSTADDR: |
389 | if (optlen < sizeof(int)) | |
390 | goto e_inval; | |
391 | np->rxopt.bits.rxorigdstaddr = valbool; | |
392 | retv = 0; | |
393 | break; | |
394 | ||
333fad53 YH |
395 | case IPV6_HOPOPTS: |
396 | case IPV6_RTHDRDSTOPTS: | |
397 | case IPV6_RTHDR: | |
398 | case IPV6_DSTOPTS: | |
399 | { | |
400 | struct ipv6_txoptions *opt; | |
aea7427f SW |
401 | |
402 | /* remove any sticky options header with a zero option | |
403 | * length, per RFC3542. | |
404 | */ | |
333fad53 | 405 | if (optlen == 0) |
cb422c46 | 406 | optval = NULL; |
63159f29 | 407 | else if (!optval) |
cfb266c0 | 408 | goto e_inval; |
aea7427f SW |
409 | else if (optlen < sizeof(struct ipv6_opt_hdr) || |
410 | optlen & 0x7 || optlen > 8 * 255) | |
411 | goto e_inval; | |
333fad53 YH |
412 | |
413 | /* hop-by-hop / destination options are privileged option */ | |
414 | retv = -EPERM; | |
af31f412 | 415 | if (optname != IPV6_RTHDR && !ns_capable(net->user_ns, CAP_NET_RAW)) |
333fad53 YH |
416 | break; |
417 | ||
1e1d04e6 HFS |
418 | opt = rcu_dereference_protected(np->opt, |
419 | lockdep_sock_is_held(sk)); | |
45f6fad8 | 420 | opt = ipv6_renew_options(sk, opt, optname, |
333fad53 YH |
421 | (struct ipv6_opt_hdr __user *)optval, |
422 | optlen); | |
423 | if (IS_ERR(opt)) { | |
424 | retv = PTR_ERR(opt); | |
425 | break; | |
426 | } | |
427 | ||
428 | /* routing header option needs extra check */ | |
6e093d9d | 429 | retv = -EINVAL; |
dfee0a72 | 430 | if (optname == IPV6_RTHDR && opt && opt->srcrt) { |
333fad53 | 431 | struct ipv6_rt_hdr *rthdr = opt->srcrt; |
280a9d34 | 432 | switch (rthdr->type) { |
07a93626 | 433 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
280a9d34 | 434 | case IPV6_SRCRT_TYPE_2: |
6e093d9d BH |
435 | if (rthdr->hdrlen != 2 || |
436 | rthdr->segments_left != 1) | |
437 | goto sticky_done; | |
438 | ||
280a9d34 | 439 | break; |
bb4dbf9e | 440 | #endif |
a149e7c7 DL |
441 | case IPV6_SRCRT_TYPE_4: |
442 | { | |
443 | struct ipv6_sr_hdr *srh = (struct ipv6_sr_hdr *) | |
444 | opt->srcrt; | |
445 | ||
446 | if (!seg6_validate_srh(srh, optlen)) | |
447 | goto sticky_done; | |
448 | break; | |
449 | } | |
280a9d34 | 450 | default: |
333fad53 | 451 | goto sticky_done; |
280a9d34 | 452 | } |
333fad53 YH |
453 | } |
454 | ||
455 | retv = 0; | |
e7712f1a | 456 | opt = ipv6_update_options(sk, opt); |
333fad53 | 457 | sticky_done: |
45f6fad8 ED |
458 | if (opt) { |
459 | atomic_sub(opt->tot_len, &sk->sk_omem_alloc); | |
460 | txopt_put(opt); | |
461 | } | |
333fad53 YH |
462 | break; |
463 | } | |
464 | ||
b24a2516 YH |
465 | case IPV6_PKTINFO: |
466 | { | |
467 | struct in6_pktinfo pkt; | |
468 | ||
469 | if (optlen == 0) | |
470 | goto e_inval; | |
63159f29 | 471 | else if (optlen < sizeof(struct in6_pktinfo) || !optval) |
b24a2516 YH |
472 | goto e_inval; |
473 | ||
914d1164 | 474 | if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) { |
b24a2516 YH |
475 | retv = -EFAULT; |
476 | break; | |
477 | } | |
478 | if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if) | |
479 | goto e_inval; | |
480 | ||
481 | np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex; | |
4e3fd7a0 | 482 | np->sticky_pktinfo.ipi6_addr = pkt.ipi6_addr; |
b24a2516 YH |
483 | retv = 0; |
484 | break; | |
485 | } | |
486 | ||
333fad53 | 487 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
488 | { |
489 | struct ipv6_txoptions *opt = NULL; | |
490 | struct msghdr msg; | |
4c9483b2 | 491 | struct flowi6 fl6; |
ad1e46a8 | 492 | struct sockcm_cookie sockc_junk; |
26879da5 | 493 | struct ipcm6_cookie ipc6; |
1da177e4 | 494 | |
4c9483b2 DM |
495 | memset(&fl6, 0, sizeof(fl6)); |
496 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
497 | fl6.flowi6_mark = sk->sk_mark; | |
1da177e4 LT |
498 | |
499 | if (optlen == 0) | |
500 | goto update; | |
501 | ||
502 | /* 1K is probably excessive | |
503 | * 1K is surely not enough, 2K per standard header is 16K. | |
504 | */ | |
505 | retv = -EINVAL; | |
506 | if (optlen > 64*1024) | |
507 | break; | |
508 | ||
509 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
510 | retv = -ENOBUFS; | |
63159f29 | 511 | if (!opt) |
1da177e4 LT |
512 | break; |
513 | ||
514 | memset(opt, 0, sizeof(*opt)); | |
0aeea21a | 515 | refcount_set(&opt->refcnt, 1); |
1da177e4 LT |
516 | opt->tot_len = sizeof(*opt) + optlen; |
517 | retv = -EFAULT; | |
518 | if (copy_from_user(opt+1, optval, optlen)) | |
519 | goto done; | |
520 | ||
521 | msg.msg_controllen = optlen; | |
67ba4152 | 522 | msg.msg_control = (void *)(opt+1); |
26879da5 | 523 | ipc6.opt = opt; |
1da177e4 | 524 | |
26879da5 | 525 | retv = ip6_datagram_send_ctl(net, sk, &msg, &fl6, &ipc6, &sockc_junk); |
1da177e4 LT |
526 | if (retv) |
527 | goto done; | |
528 | update: | |
529 | retv = 0; | |
e7712f1a | 530 | opt = ipv6_update_options(sk, opt); |
1da177e4 | 531 | done: |
45f6fad8 ED |
532 | if (opt) { |
533 | atomic_sub(opt->tot_len, &sk->sk_omem_alloc); | |
534 | txopt_put(opt); | |
535 | } | |
1da177e4 LT |
536 | break; |
537 | } | |
538 | case IPV6_UNICAST_HOPS: | |
b2a9d7c2 YH |
539 | if (optlen < sizeof(int)) |
540 | goto e_inval; | |
1da177e4 LT |
541 | if (val > 255 || val < -1) |
542 | goto e_inval; | |
543 | np->hop_limit = val; | |
544 | retv = 0; | |
545 | break; | |
546 | ||
547 | case IPV6_MULTICAST_HOPS: | |
548 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 549 | break; |
b2a9d7c2 YH |
550 | if (optlen < sizeof(int)) |
551 | goto e_inval; | |
1da177e4 LT |
552 | if (val > 255 || val < -1) |
553 | goto e_inval; | |
2a38e6d5 | 554 | np->mcast_hops = (val == -1 ? IPV6_DEFAULT_MCASTHOPS : val); |
1da177e4 LT |
555 | retv = 0; |
556 | break; | |
557 | ||
558 | case IPV6_MULTICAST_LOOP: | |
b2a9d7c2 YH |
559 | if (optlen < sizeof(int)) |
560 | goto e_inval; | |
28d44882 YH |
561 | if (val != valbool) |
562 | goto e_inval; | |
1da177e4 LT |
563 | np->mc_loop = valbool; |
564 | retv = 0; | |
565 | break; | |
566 | ||
c4062dfc EH |
567 | case IPV6_UNICAST_IF: |
568 | { | |
569 | struct net_device *dev = NULL; | |
570 | int ifindex; | |
571 | ||
572 | if (optlen != sizeof(int)) | |
573 | goto e_inval; | |
574 | ||
575 | ifindex = (__force int)ntohl((__force __be32)val); | |
576 | if (ifindex == 0) { | |
577 | np->ucast_oif = 0; | |
578 | retv = 0; | |
579 | break; | |
580 | } | |
581 | ||
582 | dev = dev_get_by_index(net, ifindex); | |
583 | retv = -EADDRNOTAVAIL; | |
584 | if (!dev) | |
585 | break; | |
586 | dev_put(dev); | |
587 | ||
588 | retv = -EINVAL; | |
589 | if (sk->sk_bound_dev_if) | |
590 | break; | |
591 | ||
592 | np->ucast_oif = ifindex; | |
593 | retv = 0; | |
594 | break; | |
595 | } | |
596 | ||
1da177e4 LT |
597 | case IPV6_MULTICAST_IF: |
598 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 599 | break; |
b2a9d7c2 YH |
600 | if (optlen < sizeof(int)) |
601 | goto e_inval; | |
1da177e4 | 602 | |
4953f0fc | 603 | if (val) { |
55b80503 | 604 | struct net_device *dev; |
7bb387c5 | 605 | int midx; |
55b80503 | 606 | |
7bb387c5 | 607 | rcu_read_lock(); |
4953f0fc | 608 | |
7bb387c5 | 609 | dev = dev_get_by_index_rcu(net, val); |
55b80503 | 610 | if (!dev) { |
7bb387c5 | 611 | rcu_read_unlock(); |
4953f0fc BH |
612 | retv = -ENODEV; |
613 | break; | |
614 | } | |
7bb387c5 DA |
615 | midx = l3mdev_master_ifindex_rcu(dev); |
616 | ||
617 | rcu_read_unlock(); | |
618 | ||
619 | if (sk->sk_bound_dev_if && | |
620 | sk->sk_bound_dev_if != val && | |
621 | (!midx || midx != sk->sk_bound_dev_if)) | |
622 | goto e_inval; | |
1da177e4 LT |
623 | } |
624 | np->mcast_oif = val; | |
625 | retv = 0; | |
626 | break; | |
627 | case IPV6_ADD_MEMBERSHIP: | |
628 | case IPV6_DROP_MEMBERSHIP: | |
629 | { | |
630 | struct ipv6_mreq mreq; | |
631 | ||
a28398ba WC |
632 | if (optlen < sizeof(struct ipv6_mreq)) |
633 | goto e_inval; | |
634 | ||
a96fb49b FL |
635 | retv = -EPROTO; |
636 | if (inet_sk(sk)->is_icsk) | |
637 | break; | |
638 | ||
1da177e4 LT |
639 | retv = -EFAULT; |
640 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
641 | break; | |
642 | ||
643 | if (optname == IPV6_ADD_MEMBERSHIP) | |
54ff9ef3 | 644 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); |
1da177e4 | 645 | else |
54ff9ef3 | 646 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); |
1da177e4 LT |
647 | break; |
648 | } | |
649 | case IPV6_JOIN_ANYCAST: | |
650 | case IPV6_LEAVE_ANYCAST: | |
651 | { | |
652 | struct ipv6_mreq mreq; | |
653 | ||
a28398ba | 654 | if (optlen < sizeof(struct ipv6_mreq)) |
1da177e4 LT |
655 | goto e_inval; |
656 | ||
657 | retv = -EFAULT; | |
658 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
659 | break; | |
660 | ||
661 | if (optname == IPV6_JOIN_ANYCAST) | |
662 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
663 | else | |
664 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
665 | break; | |
666 | } | |
667 | case MCAST_JOIN_GROUP: | |
668 | case MCAST_LEAVE_GROUP: | |
669 | { | |
670 | struct group_req greq; | |
671 | struct sockaddr_in6 *psin6; | |
672 | ||
a28398ba WC |
673 | if (optlen < sizeof(struct group_req)) |
674 | goto e_inval; | |
675 | ||
1da177e4 LT |
676 | retv = -EFAULT; |
677 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
678 | break; | |
679 | if (greq.gr_group.ss_family != AF_INET6) { | |
680 | retv = -EADDRNOTAVAIL; | |
681 | break; | |
682 | } | |
683 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
684 | if (optname == MCAST_JOIN_GROUP) | |
54ff9ef3 MRL |
685 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, |
686 | &psin6->sin6_addr); | |
1da177e4 | 687 | else |
54ff9ef3 MRL |
688 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, |
689 | &psin6->sin6_addr); | |
1da177e4 LT |
690 | break; |
691 | } | |
692 | case MCAST_JOIN_SOURCE_GROUP: | |
693 | case MCAST_LEAVE_SOURCE_GROUP: | |
694 | case MCAST_BLOCK_SOURCE: | |
695 | case MCAST_UNBLOCK_SOURCE: | |
696 | { | |
697 | struct group_source_req greqs; | |
698 | int omode, add; | |
699 | ||
a28398ba | 700 | if (optlen < sizeof(struct group_source_req)) |
1da177e4 LT |
701 | goto e_inval; |
702 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
703 | retv = -EFAULT; | |
704 | break; | |
705 | } | |
706 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
707 | greqs.gsr_source.ss_family != AF_INET6) { | |
708 | retv = -EADDRNOTAVAIL; | |
709 | break; | |
710 | } | |
711 | if (optname == MCAST_BLOCK_SOURCE) { | |
712 | omode = MCAST_EXCLUDE; | |
713 | add = 1; | |
714 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
715 | omode = MCAST_EXCLUDE; | |
716 | add = 0; | |
717 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
718 | struct sockaddr_in6 *psin6; | |
719 | ||
720 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
54ff9ef3 MRL |
721 | retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, |
722 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
723 | /* prior join w/ different source is ok */ |
724 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
725 | break; |
726 | omode = MCAST_INCLUDE; | |
727 | add = 1; | |
c9e3e8b6 | 728 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
729 | omode = MCAST_INCLUDE; |
730 | add = 0; | |
731 | } | |
732 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
733 | break; | |
734 | } | |
735 | case MCAST_MSFILTER: | |
736 | { | |
1da177e4 LT |
737 | struct group_filter *gsf; |
738 | ||
739 | if (optlen < GROUP_FILTER_SIZE(0)) | |
740 | goto e_inval; | |
741 | if (optlen > sysctl_optmem_max) { | |
742 | retv = -ENOBUFS; | |
743 | break; | |
744 | } | |
43727da9 AV |
745 | gsf = memdup_user(optval, optlen); |
746 | if (IS_ERR(gsf)) { | |
747 | retv = PTR_ERR(gsf); | |
1da177e4 LT |
748 | break; |
749 | } | |
750 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
751 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
752 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
753 | kfree(gsf); | |
754 | retv = -ENOBUFS; | |
755 | break; | |
756 | } | |
757 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
758 | kfree(gsf); | |
759 | retv = -EINVAL; | |
760 | break; | |
761 | } | |
762 | retv = ip6_mc_msfilter(sk, gsf); | |
763 | kfree(gsf); | |
764 | ||
765 | break; | |
766 | } | |
767 | case IPV6_ROUTER_ALERT: | |
b2a9d7c2 YH |
768 | if (optlen < sizeof(int)) |
769 | goto e_inval; | |
725a8ff0 | 770 | retv = ip6_ra_control(sk, val); |
1da177e4 LT |
771 | break; |
772 | case IPV6_MTU_DISCOVER: | |
b2a9d7c2 YH |
773 | if (optlen < sizeof(int)) |
774 | goto e_inval; | |
0b95227a | 775 | if (val < IPV6_PMTUDISC_DONT || val > IPV6_PMTUDISC_OMIT) |
1da177e4 LT |
776 | goto e_inval; |
777 | np->pmtudisc = val; | |
778 | retv = 0; | |
779 | break; | |
780 | case IPV6_MTU: | |
b2a9d7c2 YH |
781 | if (optlen < sizeof(int)) |
782 | goto e_inval; | |
1da177e4 LT |
783 | if (val && val < IPV6_MIN_MTU) |
784 | goto e_inval; | |
785 | np->frag_size = val; | |
786 | retv = 0; | |
787 | break; | |
788 | case IPV6_RECVERR: | |
b2a9d7c2 YH |
789 | if (optlen < sizeof(int)) |
790 | goto e_inval; | |
1da177e4 LT |
791 | np->recverr = valbool; |
792 | if (!val) | |
793 | skb_queue_purge(&sk->sk_error_queue); | |
794 | retv = 0; | |
795 | break; | |
796 | case IPV6_FLOWINFO_SEND: | |
b2a9d7c2 YH |
797 | if (optlen < sizeof(int)) |
798 | goto e_inval; | |
1da177e4 LT |
799 | np->sndflow = valbool; |
800 | retv = 0; | |
801 | break; | |
802 | case IPV6_FLOWLABEL_MGR: | |
803 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
804 | break; | |
805 | case IPV6_IPSEC_POLICY: | |
806 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 | 807 | retv = -EPERM; |
af31f412 | 808 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
6fc0b4a7 | 809 | break; |
1da177e4 LT |
810 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
811 | break; | |
812 | ||
7cbca67c YH |
813 | case IPV6_ADDR_PREFERENCES: |
814 | { | |
815 | unsigned int pref = 0; | |
816 | unsigned int prefmask = ~0; | |
817 | ||
b2a9d7c2 YH |
818 | if (optlen < sizeof(int)) |
819 | goto e_inval; | |
820 | ||
7cbca67c YH |
821 | retv = -EINVAL; |
822 | ||
823 | /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ | |
824 | switch (val & (IPV6_PREFER_SRC_PUBLIC| | |
825 | IPV6_PREFER_SRC_TMP| | |
826 | IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { | |
827 | case IPV6_PREFER_SRC_PUBLIC: | |
828 | pref |= IPV6_PREFER_SRC_PUBLIC; | |
829 | break; | |
830 | case IPV6_PREFER_SRC_TMP: | |
831 | pref |= IPV6_PREFER_SRC_TMP; | |
832 | break; | |
833 | case IPV6_PREFER_SRC_PUBTMP_DEFAULT: | |
834 | break; | |
835 | case 0: | |
836 | goto pref_skip_pubtmp; | |
837 | default: | |
838 | goto e_inval; | |
839 | } | |
840 | ||
841 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| | |
842 | IPV6_PREFER_SRC_TMP); | |
843 | pref_skip_pubtmp: | |
844 | ||
845 | /* check HOME/COA conflicts */ | |
846 | switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { | |
847 | case IPV6_PREFER_SRC_HOME: | |
848 | break; | |
849 | case IPV6_PREFER_SRC_COA: | |
850 | pref |= IPV6_PREFER_SRC_COA; | |
851 | case 0: | |
852 | goto pref_skip_coa; | |
853 | default: | |
854 | goto e_inval; | |
855 | } | |
856 | ||
857 | prefmask &= ~IPV6_PREFER_SRC_COA; | |
858 | pref_skip_coa: | |
859 | ||
860 | /* check CGA/NONCGA conflicts */ | |
861 | switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { | |
862 | case IPV6_PREFER_SRC_CGA: | |
863 | case IPV6_PREFER_SRC_NONCGA: | |
864 | case 0: | |
865 | break; | |
866 | default: | |
867 | goto e_inval; | |
868 | } | |
869 | ||
870 | np->srcprefs = (np->srcprefs & prefmask) | pref; | |
871 | retv = 0; | |
872 | ||
873 | break; | |
874 | } | |
e802af9c SH |
875 | case IPV6_MINHOPCOUNT: |
876 | if (optlen < sizeof(int)) | |
877 | goto e_inval; | |
878 | if (val < 0 || val > 255) | |
879 | goto e_inval; | |
880 | np->min_hopcount = val; | |
d4596bad | 881 | retv = 0; |
793b1473 BH |
882 | break; |
883 | case IPV6_DONTFRAG: | |
884 | np->dontfrag = valbool; | |
e802af9c SH |
885 | retv = 0; |
886 | break; | |
cb1ce2ef TH |
887 | case IPV6_AUTOFLOWLABEL: |
888 | np->autoflowlabel = valbool; | |
513674b5 | 889 | np->autoflowlabel_set = 1; |
cb1ce2ef TH |
890 | retv = 0; |
891 | break; | |
0cc0aa61 WB |
892 | case IPV6_RECVFRAGSIZE: |
893 | np->rxopt.bits.recvfragsize = valbool; | |
894 | retv = 0; | |
895 | break; | |
1da177e4 | 896 | } |
7cbca67c | 897 | |
1da177e4 | 898 | release_sock(sk); |
baf606d9 MRL |
899 | if (needs_rtnl) |
900 | rtnl_unlock(); | |
1da177e4 | 901 | |
1da177e4 LT |
902 | return retv; |
903 | ||
904 | e_inval: | |
905 | release_sock(sk); | |
baf606d9 MRL |
906 | if (needs_rtnl) |
907 | rtnl_unlock(); | |
1da177e4 LT |
908 | return -EINVAL; |
909 | } | |
910 | ||
3fdadf7d | 911 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 912 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
913 | { |
914 | int err; | |
915 | ||
916 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
917 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
918 | ||
919 | if (level != SOL_IPV6) | |
920 | return -ENOPROTOOPT; | |
921 | ||
922 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
923 | #ifdef CONFIG_NETFILTER | |
924 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
925 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
926 | optname != IPV6_XFRM_POLICY) { | |
927 | lock_sock(sk); | |
928 | err = nf_setsockopt(sk, PF_INET6, optname, optval, | |
929 | optlen); | |
930 | release_sock(sk); | |
931 | } | |
932 | #endif | |
933 | return err; | |
934 | } | |
7159039a | 935 | EXPORT_SYMBOL(ipv6_setsockopt); |
3fdadf7d DM |
936 | |
937 | #ifdef CONFIG_COMPAT | |
938 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
b7058842 | 939 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
940 | { |
941 | int err; | |
942 | ||
943 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
944 | if (udp_prot.compat_setsockopt != NULL) |
945 | return udp_prot.compat_setsockopt(sk, level, optname, | |
946 | optval, optlen); | |
947 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
948 | } |
949 | ||
950 | if (level != SOL_IPV6) | |
951 | return -ENOPROTOOPT; | |
952 | ||
dae50295 DS |
953 | if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) |
954 | return compat_mc_setsockopt(sk, level, optname, optval, optlen, | |
955 | ipv6_setsockopt); | |
956 | ||
3fdadf7d DM |
957 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); |
958 | #ifdef CONFIG_NETFILTER | |
959 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
960 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
543d9cfe | 961 | optname != IPV6_XFRM_POLICY) { |
3fdadf7d | 962 | lock_sock(sk); |
543d9cfe ACM |
963 | err = compat_nf_setsockopt(sk, PF_INET6, optname, |
964 | optval, optlen); | |
3fdadf7d DM |
965 | release_sock(sk); |
966 | } | |
967 | #endif | |
968 | return err; | |
969 | } | |
543d9cfe | 970 | EXPORT_SYMBOL(compat_ipv6_setsockopt); |
3fdadf7d DM |
971 | #endif |
972 | ||
28693079 | 973 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, |
4c6510a7 | 974 | int optname, char __user *optval, int len) |
333fad53 | 975 | { |
28693079 DM |
976 | struct ipv6_opt_hdr *hdr; |
977 | ||
4c6510a7 YH |
978 | if (!opt) |
979 | return 0; | |
980 | ||
67ba4152 | 981 | switch (optname) { |
4c6510a7 YH |
982 | case IPV6_HOPOPTS: |
983 | hdr = opt->hopopt; | |
984 | break; | |
985 | case IPV6_RTHDRDSTOPTS: | |
986 | hdr = opt->dst0opt; | |
987 | break; | |
988 | case IPV6_RTHDR: | |
989 | hdr = (struct ipv6_opt_hdr *)opt->srcrt; | |
990 | break; | |
991 | case IPV6_DSTOPTS: | |
992 | hdr = opt->dst1opt; | |
993 | break; | |
994 | default: | |
995 | return -EINVAL; /* should not happen */ | |
996 | } | |
997 | ||
998 | if (!hdr) | |
333fad53 | 999 | return 0; |
28693079 | 1000 | |
d2b02ed9 | 1001 | len = min_t(unsigned int, len, ipv6_optlen(hdr)); |
660adc6e | 1002 | if (copy_to_user(optval, hdr, len)) |
333fad53 | 1003 | return -EFAULT; |
95b496b6 | 1004 | return len; |
333fad53 YH |
1005 | } |
1006 | ||
3fdadf7d | 1007 | static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
95c96174 | 1008 | char __user *optval, int __user *optlen, unsigned int flags) |
1da177e4 LT |
1009 | { |
1010 | struct ipv6_pinfo *np = inet6_sk(sk); | |
1011 | int len; | |
1012 | int val; | |
1013 | ||
7bc570c8 YH |
1014 | if (ip6_mroute_opt(optname)) |
1015 | return ip6_mroute_getsockopt(sk, optname, optval, optlen); | |
1016 | ||
1da177e4 LT |
1017 | if (get_user(len, optlen)) |
1018 | return -EFAULT; | |
1019 | switch (optname) { | |
1020 | case IPV6_ADDRFORM: | |
1021 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 1022 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 | 1023 | sk->sk_protocol != IPPROTO_TCP) |
1717699c | 1024 | return -ENOPROTOOPT; |
1da177e4 LT |
1025 | if (sk->sk_state != TCP_ESTABLISHED) |
1026 | return -ENOTCONN; | |
1027 | val = sk->sk_family; | |
1028 | break; | |
1029 | case MCAST_MSFILTER: | |
1030 | { | |
1031 | struct group_filter gsf; | |
1032 | int err; | |
1033 | ||
1034 | if (len < GROUP_FILTER_SIZE(0)) | |
1035 | return -EINVAL; | |
1036 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
1037 | return -EFAULT; | |
20c61fbd YH |
1038 | if (gsf.gf_group.ss_family != AF_INET6) |
1039 | return -EADDRNOTAVAIL; | |
1da177e4 LT |
1040 | lock_sock(sk); |
1041 | err = ip6_mc_msfget(sk, &gsf, | |
1042 | (struct group_filter __user *)optval, optlen); | |
1043 | release_sock(sk); | |
1044 | return err; | |
1045 | } | |
1046 | ||
333fad53 | 1047 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
1048 | { |
1049 | struct msghdr msg; | |
1050 | struct sk_buff *skb; | |
1051 | ||
1052 | if (sk->sk_type != SOCK_STREAM) | |
1053 | return -ENOPROTOOPT; | |
1054 | ||
1055 | msg.msg_control = optval; | |
1056 | msg.msg_controllen = len; | |
98e77438 | 1057 | msg.msg_flags = flags; |
1da177e4 LT |
1058 | |
1059 | lock_sock(sk); | |
1060 | skb = np->pktoptions; | |
1061 | if (skb) | |
4b261c75 | 1062 | ip6_datagram_recv_ctl(sk, &msg, skb); |
1dc7b90f ED |
1063 | release_sock(sk); |
1064 | if (!skb) { | |
1da177e4 LT |
1065 | if (np->rxopt.bits.rxinfo) { |
1066 | struct in6_pktinfo src_info; | |
f250dcda YH |
1067 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
1068 | np->sticky_pktinfo.ipi6_ifindex; | |
efe4208f | 1069 | src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : np->sticky_pktinfo.ipi6_addr; |
1da177e4 LT |
1070 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); |
1071 | } | |
1072 | if (np->rxopt.bits.rxhlim) { | |
1073 | int hlim = np->mcast_hops; | |
1074 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
1075 | } | |
4c507d28 | 1076 | if (np->rxopt.bits.rxtclass) { |
d76ed22b LR |
1077 | int tclass = (int)ip6_tclass(np->rcv_flowinfo); |
1078 | ||
4c507d28 JB |
1079 | put_cmsg(&msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass); |
1080 | } | |
333fad53 YH |
1081 | if (np->rxopt.bits.rxoinfo) { |
1082 | struct in6_pktinfo src_info; | |
f250dcda YH |
1083 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
1084 | np->sticky_pktinfo.ipi6_ifindex; | |
efe4208f ED |
1085 | src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : |
1086 | np->sticky_pktinfo.ipi6_addr; | |
333fad53 YH |
1087 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); |
1088 | } | |
1089 | if (np->rxopt.bits.rxohlim) { | |
1090 | int hlim = np->mcast_hops; | |
1091 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
1092 | } | |
1397ed35 | 1093 | if (np->rxopt.bits.rxflow) { |
68536053 FF |
1094 | __be32 flowinfo = np->rcv_flowinfo; |
1095 | ||
1397ed35 FF |
1096 | put_cmsg(&msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo); |
1097 | } | |
1da177e4 LT |
1098 | } |
1099 | len -= msg.msg_controllen; | |
1100 | return put_user(len, optlen); | |
1101 | } | |
1102 | case IPV6_MTU: | |
1103 | { | |
1104 | struct dst_entry *dst; | |
b6c6712a | 1105 | |
1ab1457c | 1106 | val = 0; |
b6c6712a ED |
1107 | rcu_read_lock(); |
1108 | dst = __sk_dst_get(sk); | |
1109 | if (dst) | |
1da177e4 | 1110 | val = dst_mtu(dst); |
b6c6712a | 1111 | rcu_read_unlock(); |
1da177e4 LT |
1112 | if (!val) |
1113 | return -ENOTCONN; | |
1114 | break; | |
1115 | } | |
1116 | ||
1117 | case IPV6_V6ONLY: | |
9fe516ba | 1118 | val = sk->sk_ipv6only; |
1da177e4 LT |
1119 | break; |
1120 | ||
333fad53 | 1121 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
1122 | val = np->rxopt.bits.rxinfo; |
1123 | break; | |
1124 | ||
333fad53 YH |
1125 | case IPV6_2292PKTINFO: |
1126 | val = np->rxopt.bits.rxoinfo; | |
1127 | break; | |
1128 | ||
1129 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
1130 | val = np->rxopt.bits.rxhlim; |
1131 | break; | |
1132 | ||
333fad53 YH |
1133 | case IPV6_2292HOPLIMIT: |
1134 | val = np->rxopt.bits.rxohlim; | |
1135 | break; | |
1136 | ||
1137 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
1138 | val = np->rxopt.bits.srcrt; |
1139 | break; | |
1140 | ||
333fad53 YH |
1141 | case IPV6_2292RTHDR: |
1142 | val = np->rxopt.bits.osrcrt; | |
1143 | break; | |
1144 | ||
1da177e4 | 1145 | case IPV6_HOPOPTS: |
333fad53 YH |
1146 | case IPV6_RTHDRDSTOPTS: |
1147 | case IPV6_RTHDR: | |
1148 | case IPV6_DSTOPTS: | |
1149 | { | |
45f6fad8 | 1150 | struct ipv6_txoptions *opt; |
333fad53 YH |
1151 | |
1152 | lock_sock(sk); | |
1e1d04e6 HFS |
1153 | opt = rcu_dereference_protected(np->opt, |
1154 | lockdep_sock_is_held(sk)); | |
45f6fad8 | 1155 | len = ipv6_getsockopt_sticky(sk, opt, optname, optval, len); |
333fad53 | 1156 | release_sock(sk); |
05335c22 YH |
1157 | /* check if ipv6_getsockopt_sticky() returns err code */ |
1158 | if (len < 0) | |
1159 | return len; | |
333fad53 YH |
1160 | return put_user(len, optlen); |
1161 | } | |
1162 | ||
1163 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
1164 | val = np->rxopt.bits.hopopts; |
1165 | break; | |
1166 | ||
333fad53 YH |
1167 | case IPV6_2292HOPOPTS: |
1168 | val = np->rxopt.bits.ohopopts; | |
1169 | break; | |
1170 | ||
1171 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
1172 | val = np->rxopt.bits.dstopts; |
1173 | break; | |
1174 | ||
333fad53 YH |
1175 | case IPV6_2292DSTOPTS: |
1176 | val = np->rxopt.bits.odstopts; | |
1177 | break; | |
1178 | ||
41a1f8ea YH |
1179 | case IPV6_TCLASS: |
1180 | val = np->tclass; | |
1181 | break; | |
1182 | ||
1183 | case IPV6_RECVTCLASS: | |
1184 | val = np->rxopt.bits.rxtclass; | |
1185 | break; | |
1186 | ||
1da177e4 LT |
1187 | case IPV6_FLOWINFO: |
1188 | val = np->rxopt.bits.rxflow; | |
1189 | break; | |
1190 | ||
793b1473 BH |
1191 | case IPV6_RECVPATHMTU: |
1192 | val = np->rxopt.bits.rxpmtu; | |
1193 | break; | |
1194 | ||
1195 | case IPV6_PATHMTU: | |
1196 | { | |
1197 | struct dst_entry *dst; | |
1198 | struct ip6_mtuinfo mtuinfo; | |
1199 | ||
1200 | if (len < sizeof(mtuinfo)) | |
1201 | return -EINVAL; | |
1202 | ||
1203 | len = sizeof(mtuinfo); | |
1204 | memset(&mtuinfo, 0, sizeof(mtuinfo)); | |
1205 | ||
1206 | rcu_read_lock(); | |
1207 | dst = __sk_dst_get(sk); | |
1208 | if (dst) | |
1209 | mtuinfo.ip6m_mtu = dst_mtu(dst); | |
1210 | rcu_read_unlock(); | |
1211 | if (!mtuinfo.ip6m_mtu) | |
1212 | return -ENOTCONN; | |
1213 | ||
1214 | if (put_user(len, optlen)) | |
1215 | return -EFAULT; | |
1216 | if (copy_to_user(optval, &mtuinfo, len)) | |
1217 | return -EFAULT; | |
1218 | ||
1219 | return 0; | |
793b1473 BH |
1220 | } |
1221 | ||
6c468622 BS |
1222 | case IPV6_TRANSPARENT: |
1223 | val = inet_sk(sk)->transparent; | |
1224 | break; | |
1225 | ||
84e14fe3 MÅ» |
1226 | case IPV6_FREEBIND: |
1227 | val = inet_sk(sk)->freebind; | |
1228 | break; | |
1229 | ||
6c468622 BS |
1230 | case IPV6_RECVORIGDSTADDR: |
1231 | val = np->rxopt.bits.rxorigdstaddr; | |
1232 | break; | |
1233 | ||
1da177e4 | 1234 | case IPV6_UNICAST_HOPS: |
1da177e4 | 1235 | case IPV6_MULTICAST_HOPS: |
befffe90 BH |
1236 | { |
1237 | struct dst_entry *dst; | |
1238 | ||
1239 | if (optname == IPV6_UNICAST_HOPS) | |
1240 | val = np->hop_limit; | |
1241 | else | |
1242 | val = np->mcast_hops; | |
1243 | ||
b6c6712a ED |
1244 | if (val < 0) { |
1245 | rcu_read_lock(); | |
1246 | dst = __sk_dst_get(sk); | |
1247 | if (dst) | |
6b75d090 | 1248 | val = ip6_dst_hoplimit(dst); |
b6c6712a | 1249 | rcu_read_unlock(); |
befffe90 | 1250 | } |
b6c6712a | 1251 | |
befffe90 | 1252 | if (val < 0) |
53b7997f | 1253 | val = sock_net(sk)->ipv6.devconf_all->hop_limit; |
1da177e4 | 1254 | break; |
befffe90 | 1255 | } |
1da177e4 LT |
1256 | |
1257 | case IPV6_MULTICAST_LOOP: | |
1258 | val = np->mc_loop; | |
1259 | break; | |
1260 | ||
1261 | case IPV6_MULTICAST_IF: | |
1262 | val = np->mcast_oif; | |
1263 | break; | |
1264 | ||
c4062dfc EH |
1265 | case IPV6_UNICAST_IF: |
1266 | val = (__force int)htonl((__u32) np->ucast_oif); | |
1267 | break; | |
1268 | ||
1da177e4 LT |
1269 | case IPV6_MTU_DISCOVER: |
1270 | val = np->pmtudisc; | |
1271 | break; | |
1272 | ||
1273 | case IPV6_RECVERR: | |
1274 | val = np->recverr; | |
1275 | break; | |
1276 | ||
1277 | case IPV6_FLOWINFO_SEND: | |
1278 | val = np->sndflow; | |
1279 | break; | |
1280 | ||
3fdfa5ff FF |
1281 | case IPV6_FLOWLABEL_MGR: |
1282 | { | |
1283 | struct in6_flowlabel_req freq; | |
46e5f401 | 1284 | int flags; |
3fdfa5ff FF |
1285 | |
1286 | if (len < sizeof(freq)) | |
1287 | return -EINVAL; | |
1288 | ||
1289 | if (copy_from_user(&freq, optval, sizeof(freq))) | |
1290 | return -EFAULT; | |
1291 | ||
1292 | if (freq.flr_action != IPV6_FL_A_GET) | |
1293 | return -EINVAL; | |
1294 | ||
1295 | len = sizeof(freq); | |
46e5f401 FF |
1296 | flags = freq.flr_flags; |
1297 | ||
3fdfa5ff FF |
1298 | memset(&freq, 0, sizeof(freq)); |
1299 | ||
46e5f401 | 1300 | val = ipv6_flowlabel_opt_get(sk, &freq, flags); |
3fdfa5ff FF |
1301 | if (val < 0) |
1302 | return val; | |
1303 | ||
1304 | if (put_user(len, optlen)) | |
1305 | return -EFAULT; | |
1306 | if (copy_to_user(optval, &freq, len)) | |
1307 | return -EFAULT; | |
1308 | ||
1309 | return 0; | |
1310 | } | |
1311 | ||
7cbca67c YH |
1312 | case IPV6_ADDR_PREFERENCES: |
1313 | val = 0; | |
1314 | ||
1315 | if (np->srcprefs & IPV6_PREFER_SRC_TMP) | |
1316 | val |= IPV6_PREFER_SRC_TMP; | |
1317 | else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) | |
1318 | val |= IPV6_PREFER_SRC_PUBLIC; | |
1319 | else { | |
1320 | /* XXX: should we return system default? */ | |
1321 | val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; | |
1322 | } | |
1323 | ||
1324 | if (np->srcprefs & IPV6_PREFER_SRC_COA) | |
1325 | val |= IPV6_PREFER_SRC_COA; | |
1326 | else | |
1327 | val |= IPV6_PREFER_SRC_HOME; | |
1328 | break; | |
e802af9c SH |
1329 | |
1330 | case IPV6_MINHOPCOUNT: | |
1331 | val = np->min_hopcount; | |
1332 | break; | |
793b1473 BH |
1333 | |
1334 | case IPV6_DONTFRAG: | |
1335 | val = np->dontfrag; | |
1336 | break; | |
7cbca67c | 1337 | |
cb1ce2ef | 1338 | case IPV6_AUTOFLOWLABEL: |
e9191ffb | 1339 | val = ip6_autoflowlabel(sock_net(sk), np); |
cb1ce2ef TH |
1340 | break; |
1341 | ||
0cc0aa61 WB |
1342 | case IPV6_RECVFRAGSIZE: |
1343 | val = np->rxopt.bits.recvfragsize; | |
1344 | break; | |
1345 | ||
1da177e4 | 1346 | default: |
cf6fc4a9 | 1347 | return -ENOPROTOOPT; |
1da177e4 LT |
1348 | } |
1349 | len = min_t(unsigned int, sizeof(int), len); | |
67ba4152 | 1350 | if (put_user(len, optlen)) |
1da177e4 | 1351 | return -EFAULT; |
67ba4152 | 1352 | if (copy_to_user(optval, &val, len)) |
1da177e4 LT |
1353 | return -EFAULT; |
1354 | return 0; | |
1355 | } | |
1356 | ||
3fdadf7d DM |
1357 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1358 | char __user *optval, int __user *optlen) | |
1359 | { | |
1360 | int err; | |
1361 | ||
1362 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
1363 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
1364 | ||
67ba4152 | 1365 | if (level != SOL_IPV6) |
3fdadf7d DM |
1366 | return -ENOPROTOOPT; |
1367 | ||
98e77438 | 1368 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 0); |
3fdadf7d | 1369 | #ifdef CONFIG_NETFILTER |
cf6fc4a9 WY |
1370 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1371 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1372 | int len; |
1373 | ||
1374 | if (get_user(len, optlen)) | |
1375 | return -EFAULT; | |
1376 | ||
1377 | lock_sock(sk); | |
1378 | err = nf_getsockopt(sk, PF_INET6, optname, optval, | |
1379 | &len); | |
1380 | release_sock(sk); | |
1381 | if (err >= 0) | |
1382 | err = put_user(len, optlen); | |
1383 | } | |
1384 | #endif | |
1385 | return err; | |
1386 | } | |
7159039a YH |
1387 | EXPORT_SYMBOL(ipv6_getsockopt); |
1388 | ||
3fdadf7d DM |
1389 | #ifdef CONFIG_COMPAT |
1390 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1391 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
1392 | { |
1393 | int err; | |
1394 | ||
1395 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
1396 | if (udp_prot.compat_getsockopt != NULL) |
1397 | return udp_prot.compat_getsockopt(sk, level, optname, | |
1398 | optval, optlen); | |
1399 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
1400 | } |
1401 | ||
543d9cfe | 1402 | if (level != SOL_IPV6) |
3fdadf7d DM |
1403 | return -ENOPROTOOPT; |
1404 | ||
80991790 PE |
1405 | if (optname == MCAST_MSFILTER) |
1406 | return compat_mc_getsockopt(sk, level, optname, optval, optlen, | |
1407 | ipv6_getsockopt); | |
1408 | ||
98e77438 DB |
1409 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, |
1410 | MSG_CMSG_COMPAT); | |
3fdadf7d | 1411 | #ifdef CONFIG_NETFILTER |
cf6fc4a9 WY |
1412 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1413 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1414 | int len; |
1415 | ||
1416 | if (get_user(len, optlen)) | |
1417 | return -EFAULT; | |
1418 | ||
1419 | lock_sock(sk); | |
543d9cfe ACM |
1420 | err = compat_nf_getsockopt(sk, PF_INET6, |
1421 | optname, optval, &len); | |
3fdadf7d DM |
1422 | release_sock(sk); |
1423 | if (err >= 0) | |
1424 | err = put_user(len, optlen); | |
1425 | } | |
1426 | #endif | |
1427 | return err; | |
1428 | } | |
543d9cfe | 1429 | EXPORT_SYMBOL(compat_ipv6_getsockopt); |
3fdadf7d DM |
1430 | #endif |
1431 |