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> | |
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 | ||
1da177e4 LT |
58 | struct ip6_ra_chain *ip6_ra_chain; |
59 | DEFINE_RWLOCK(ip6_ra_lock); | |
60 | ||
725a8ff0 | 61 | int ip6_ra_control(struct sock *sk, int sel) |
1da177e4 LT |
62 | { |
63 | struct ip6_ra_chain *ra, *new_ra, **rap; | |
64 | ||
65 | /* RA packet may be delivered ONLY to IPPROTO_RAW socket */ | |
c720c7e8 | 66 | if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num != IPPROTO_RAW) |
1717699c | 67 | return -ENOPROTOOPT; |
1da177e4 | 68 | |
67ba4152 | 69 | new_ra = (sel >= 0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; |
1da177e4 LT |
70 | |
71 | write_lock_bh(&ip6_ra_lock); | |
67ba4152 | 72 | for (rap = &ip6_ra_chain; (ra = *rap) != NULL; rap = &ra->next) { |
1da177e4 | 73 | if (ra->sk == sk) { |
67ba4152 | 74 | if (sel >= 0) { |
1da177e4 | 75 | write_unlock_bh(&ip6_ra_lock); |
a51482bd | 76 | kfree(new_ra); |
1da177e4 LT |
77 | return -EADDRINUSE; |
78 | } | |
79 | ||
80 | *rap = ra->next; | |
81 | write_unlock_bh(&ip6_ra_lock); | |
82 | ||
1da177e4 LT |
83 | sock_put(sk); |
84 | kfree(ra); | |
85 | return 0; | |
86 | } | |
87 | } | |
63159f29 | 88 | if (!new_ra) { |
1da177e4 LT |
89 | write_unlock_bh(&ip6_ra_lock); |
90 | return -ENOBUFS; | |
91 | } | |
92 | new_ra->sk = sk; | |
93 | new_ra->sel = sel; | |
1da177e4 LT |
94 | new_ra->next = ra; |
95 | *rap = new_ra; | |
96 | sock_hold(sk); | |
97 | write_unlock_bh(&ip6_ra_lock); | |
98 | return 0; | |
99 | } | |
100 | ||
e7712f1a YH |
101 | struct ipv6_txoptions *ipv6_update_options(struct sock *sk, |
102 | struct ipv6_txoptions *opt) | |
103 | { | |
104 | if (inet_sk(sk)->is_icsk) { | |
105 | if (opt && | |
106 | !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) && | |
c720c7e8 | 107 | inet_sk(sk)->inet_daddr != LOOPBACK4_IPV6) { |
e7712f1a YH |
108 | struct inet_connection_sock *icsk = inet_csk(sk); |
109 | icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen; | |
110 | icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); | |
111 | } | |
e7712f1a | 112 | } |
45f6fad8 ED |
113 | opt = xchg((__force struct ipv6_txoptions **)&inet6_sk(sk)->opt, |
114 | opt); | |
e7712f1a YH |
115 | sk_dst_reset(sk); |
116 | ||
117 | return opt; | |
118 | } | |
119 | ||
baf606d9 MRL |
120 | static bool setsockopt_needs_rtnl(int optname) |
121 | { | |
122 | switch (optname) { | |
123 | case IPV6_ADD_MEMBERSHIP: | |
124 | case IPV6_DROP_MEMBERSHIP: | |
c4a6853d MRL |
125 | case IPV6_JOIN_ANYCAST: |
126 | case IPV6_LEAVE_ANYCAST: | |
baf606d9 MRL |
127 | case MCAST_JOIN_GROUP: |
128 | case MCAST_LEAVE_GROUP: | |
54ff9ef3 MRL |
129 | case MCAST_JOIN_SOURCE_GROUP: |
130 | case MCAST_LEAVE_SOURCE_GROUP: | |
131 | case MCAST_BLOCK_SOURCE: | |
132 | case MCAST_UNBLOCK_SOURCE: | |
133 | case MCAST_MSFILTER: | |
baf606d9 MRL |
134 | return true; |
135 | } | |
136 | return false; | |
137 | } | |
138 | ||
3fdadf7d | 139 | static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 140 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
141 | { |
142 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 143 | struct net *net = sock_net(sk); |
1da177e4 LT |
144 | int val, valbool; |
145 | int retv = -ENOPROTOOPT; | |
baf606d9 | 146 | bool needs_rtnl = setsockopt_needs_rtnl(optname); |
1da177e4 | 147 | |
63159f29 | 148 | if (!optval) |
67ba4152 | 149 | val = 0; |
b2a9d7c2 YH |
150 | else { |
151 | if (optlen >= sizeof(int)) { | |
152 | if (get_user(val, (int __user *) optval)) | |
153 | return -EFAULT; | |
154 | } else | |
155 | val = 0; | |
156 | } | |
1da177e4 | 157 | |
67ba4152 | 158 | valbool = (val != 0); |
1da177e4 | 159 | |
7bc570c8 YH |
160 | if (ip6_mroute_opt(optname)) |
161 | return ip6_mroute_setsockopt(sk, optname, optval, optlen); | |
162 | ||
baf606d9 MRL |
163 | if (needs_rtnl) |
164 | rtnl_lock(); | |
1da177e4 LT |
165 | lock_sock(sk); |
166 | ||
167 | switch (optname) { | |
168 | ||
169 | case IPV6_ADDRFORM: | |
b2a9d7c2 YH |
170 | if (optlen < sizeof(int)) |
171 | goto e_inval; | |
1da177e4 LT |
172 | if (val == PF_INET) { |
173 | struct ipv6_txoptions *opt; | |
174 | struct sk_buff *pktopt; | |
175 | ||
49d074f4 DL |
176 | if (sk->sk_type == SOCK_RAW) |
177 | break; | |
178 | ||
9596cc82 DL |
179 | if (sk->sk_protocol == IPPROTO_UDP || |
180 | sk->sk_protocol == IPPROTO_UDPLITE) { | |
181 | struct udp_sock *up = udp_sk(sk); | |
182 | if (up->pending == AF_INET6) { | |
183 | retv = -EBUSY; | |
184 | break; | |
185 | } | |
186 | } else if (sk->sk_protocol != IPPROTO_TCP) | |
1da177e4 LT |
187 | break; |
188 | ||
189 | if (sk->sk_state != TCP_ESTABLISHED) { | |
190 | retv = -ENOTCONN; | |
191 | break; | |
192 | } | |
193 | ||
194 | if (ipv6_only_sock(sk) || | |
efe4208f | 195 | !ipv6_addr_v4mapped(&sk->sk_v6_daddr)) { |
1da177e4 LT |
196 | retv = -EADDRNOTAVAIL; |
197 | break; | |
198 | } | |
199 | ||
200 | fl6_free_socklist(sk); | |
201 | ipv6_sock_mc_close(sk); | |
202 | ||
e6848976 ACM |
203 | /* |
204 | * Sock is moving from IPv6 to IPv4 (sk_prot), so | |
205 | * remove it from the refcnt debug socks count in the | |
206 | * original family... | |
207 | */ | |
208 | sk_refcnt_debug_dec(sk); | |
209 | ||
1da177e4 | 210 | if (sk->sk_protocol == IPPROTO_TCP) { |
d83d8461 | 211 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 | 212 | local_bh_disable(); |
c29a0bc4 PE |
213 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
214 | sock_prot_inuse_add(net, &tcp_prot, 1); | |
1da177e4 LT |
215 | local_bh_enable(); |
216 | sk->sk_prot = &tcp_prot; | |
d83d8461 | 217 | icsk->icsk_af_ops = &ipv4_specific; |
1da177e4 LT |
218 | sk->sk_socket->ops = &inet_stream_ops; |
219 | sk->sk_family = PF_INET; | |
d83d8461 | 220 | tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); |
1da177e4 | 221 | } else { |
ba4e58ec GR |
222 | struct proto *prot = &udp_prot; |
223 | ||
db8dac20 | 224 | if (sk->sk_protocol == IPPROTO_UDPLITE) |
ba4e58ec | 225 | prot = &udplite_prot; |
1da177e4 | 226 | local_bh_disable(); |
c29a0bc4 PE |
227 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
228 | sock_prot_inuse_add(net, prot, 1); | |
1da177e4 | 229 | local_bh_enable(); |
ba4e58ec | 230 | sk->sk_prot = prot; |
1da177e4 LT |
231 | sk->sk_socket->ops = &inet_dgram_ops; |
232 | sk->sk_family = PF_INET; | |
233 | } | |
45f6fad8 ED |
234 | opt = xchg((__force struct ipv6_txoptions **)&np->opt, |
235 | NULL); | |
236 | if (opt) { | |
237 | atomic_sub(opt->tot_len, &sk->sk_omem_alloc); | |
238 | txopt_put(opt); | |
239 | } | |
1da177e4 | 240 | pktopt = xchg(&np->pktoptions, NULL); |
800d55f1 | 241 | kfree_skb(pktopt); |
1da177e4 LT |
242 | |
243 | sk->sk_destruct = inet_sock_destruct; | |
e6848976 ACM |
244 | /* |
245 | * ... and add it to the refcnt debug socks count | |
246 | * in the new family. -acme | |
247 | */ | |
248 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
249 | module_put(THIS_MODULE); |
250 | retv = 0; | |
251 | break; | |
252 | } | |
253 | goto e_inval; | |
254 | ||
255 | case IPV6_V6ONLY: | |
b2a9d7c2 | 256 | if (optlen < sizeof(int) || |
c720c7e8 | 257 | inet_sk(sk)->inet_num) |
1da177e4 | 258 | goto e_inval; |
9fe516ba | 259 | sk->sk_ipv6only = valbool; |
1da177e4 LT |
260 | retv = 0; |
261 | break; | |
262 | ||
333fad53 | 263 | case IPV6_RECVPKTINFO: |
b2a9d7c2 YH |
264 | if (optlen < sizeof(int)) |
265 | goto e_inval; | |
1da177e4 LT |
266 | np->rxopt.bits.rxinfo = valbool; |
267 | retv = 0; | |
268 | break; | |
1ab1457c | 269 | |
333fad53 | 270 | case IPV6_2292PKTINFO: |
b2a9d7c2 YH |
271 | if (optlen < sizeof(int)) |
272 | goto e_inval; | |
333fad53 YH |
273 | np->rxopt.bits.rxoinfo = valbool; |
274 | retv = 0; | |
275 | break; | |
1da177e4 | 276 | |
333fad53 | 277 | case IPV6_RECVHOPLIMIT: |
b2a9d7c2 YH |
278 | if (optlen < sizeof(int)) |
279 | goto e_inval; | |
1da177e4 LT |
280 | np->rxopt.bits.rxhlim = valbool; |
281 | retv = 0; | |
282 | break; | |
283 | ||
333fad53 | 284 | case IPV6_2292HOPLIMIT: |
b2a9d7c2 YH |
285 | if (optlen < sizeof(int)) |
286 | goto e_inval; | |
333fad53 YH |
287 | np->rxopt.bits.rxohlim = valbool; |
288 | retv = 0; | |
289 | break; | |
290 | ||
291 | case IPV6_RECVRTHDR: | |
b2a9d7c2 YH |
292 | if (optlen < sizeof(int)) |
293 | goto e_inval; | |
4c752098 | 294 | np->rxopt.bits.srcrt = valbool; |
1da177e4 LT |
295 | retv = 0; |
296 | break; | |
297 | ||
333fad53 | 298 | case IPV6_2292RTHDR: |
b2a9d7c2 YH |
299 | if (optlen < sizeof(int)) |
300 | goto e_inval; | |
4c752098 | 301 | np->rxopt.bits.osrcrt = valbool; |
333fad53 YH |
302 | retv = 0; |
303 | break; | |
304 | ||
305 | case IPV6_RECVHOPOPTS: | |
b2a9d7c2 YH |
306 | if (optlen < sizeof(int)) |
307 | goto e_inval; | |
1da177e4 LT |
308 | np->rxopt.bits.hopopts = valbool; |
309 | retv = 0; | |
310 | break; | |
311 | ||
333fad53 | 312 | case IPV6_2292HOPOPTS: |
b2a9d7c2 YH |
313 | if (optlen < sizeof(int)) |
314 | goto e_inval; | |
333fad53 YH |
315 | np->rxopt.bits.ohopopts = valbool; |
316 | retv = 0; | |
317 | break; | |
318 | ||
319 | case IPV6_RECVDSTOPTS: | |
b2a9d7c2 YH |
320 | if (optlen < sizeof(int)) |
321 | goto e_inval; | |
1da177e4 LT |
322 | np->rxopt.bits.dstopts = valbool; |
323 | retv = 0; | |
324 | break; | |
325 | ||
333fad53 | 326 | case IPV6_2292DSTOPTS: |
b2a9d7c2 YH |
327 | if (optlen < sizeof(int)) |
328 | goto e_inval; | |
333fad53 YH |
329 | np->rxopt.bits.odstopts = valbool; |
330 | retv = 0; | |
331 | break; | |
332 | ||
41a1f8ea | 333 | case IPV6_TCLASS: |
b2a9d7c2 YH |
334 | if (optlen < sizeof(int)) |
335 | goto e_inval; | |
d0ee011f | 336 | if (val < -1 || val > 0xff) |
41a1f8ea | 337 | goto e_inval; |
26ced1e4 GR |
338 | /* RFC 3542, 6.5: default traffic class of 0x0 */ |
339 | if (val == -1) | |
340 | val = 0; | |
41a1f8ea YH |
341 | np->tclass = val; |
342 | retv = 0; | |
343 | break; | |
1ab1457c | 344 | |
41a1f8ea | 345 | case IPV6_RECVTCLASS: |
b2a9d7c2 YH |
346 | if (optlen < sizeof(int)) |
347 | goto e_inval; | |
41a1f8ea YH |
348 | np->rxopt.bits.rxtclass = valbool; |
349 | retv = 0; | |
350 | break; | |
351 | ||
1da177e4 | 352 | case IPV6_FLOWINFO: |
b2a9d7c2 YH |
353 | if (optlen < sizeof(int)) |
354 | goto e_inval; | |
1da177e4 LT |
355 | np->rxopt.bits.rxflow = valbool; |
356 | retv = 0; | |
357 | break; | |
358 | ||
793b1473 BH |
359 | case IPV6_RECVPATHMTU: |
360 | if (optlen < sizeof(int)) | |
361 | goto e_inval; | |
362 | np->rxopt.bits.rxpmtu = valbool; | |
363 | retv = 0; | |
364 | break; | |
365 | ||
6c468622 | 366 | case IPV6_TRANSPARENT: |
af31f412 EB |
367 | if (valbool && !ns_capable(net->user_ns, CAP_NET_ADMIN) && |
368 | !ns_capable(net->user_ns, CAP_NET_RAW)) { | |
b889416b BS |
369 | retv = -EPERM; |
370 | break; | |
371 | } | |
6c468622 BS |
372 | if (optlen < sizeof(int)) |
373 | goto e_inval; | |
374 | /* we don't have a separate transparent bit for IPV6 we use the one in the IPv4 socket */ | |
375 | inet_sk(sk)->transparent = valbool; | |
376 | retv = 0; | |
377 | break; | |
378 | ||
379 | case IPV6_RECVORIGDSTADDR: | |
380 | if (optlen < sizeof(int)) | |
381 | goto e_inval; | |
382 | np->rxopt.bits.rxorigdstaddr = valbool; | |
383 | retv = 0; | |
384 | break; | |
385 | ||
333fad53 YH |
386 | case IPV6_HOPOPTS: |
387 | case IPV6_RTHDRDSTOPTS: | |
388 | case IPV6_RTHDR: | |
389 | case IPV6_DSTOPTS: | |
390 | { | |
391 | struct ipv6_txoptions *opt; | |
aea7427f SW |
392 | |
393 | /* remove any sticky options header with a zero option | |
394 | * length, per RFC3542. | |
395 | */ | |
333fad53 | 396 | if (optlen == 0) |
cb422c46 | 397 | optval = NULL; |
63159f29 | 398 | else if (!optval) |
cfb266c0 | 399 | goto e_inval; |
aea7427f SW |
400 | else if (optlen < sizeof(struct ipv6_opt_hdr) || |
401 | optlen & 0x7 || optlen > 8 * 255) | |
402 | goto e_inval; | |
333fad53 YH |
403 | |
404 | /* hop-by-hop / destination options are privileged option */ | |
405 | retv = -EPERM; | |
af31f412 | 406 | if (optname != IPV6_RTHDR && !ns_capable(net->user_ns, CAP_NET_RAW)) |
333fad53 YH |
407 | break; |
408 | ||
1e1d04e6 HFS |
409 | opt = rcu_dereference_protected(np->opt, |
410 | lockdep_sock_is_held(sk)); | |
45f6fad8 | 411 | opt = ipv6_renew_options(sk, opt, optname, |
333fad53 YH |
412 | (struct ipv6_opt_hdr __user *)optval, |
413 | optlen); | |
414 | if (IS_ERR(opt)) { | |
415 | retv = PTR_ERR(opt); | |
416 | break; | |
417 | } | |
418 | ||
419 | /* routing header option needs extra check */ | |
6e093d9d | 420 | retv = -EINVAL; |
dfee0a72 | 421 | if (optname == IPV6_RTHDR && opt && opt->srcrt) { |
333fad53 | 422 | struct ipv6_rt_hdr *rthdr = opt->srcrt; |
280a9d34 | 423 | switch (rthdr->type) { |
07a93626 | 424 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
280a9d34 | 425 | case IPV6_SRCRT_TYPE_2: |
6e093d9d BH |
426 | if (rthdr->hdrlen != 2 || |
427 | rthdr->segments_left != 1) | |
428 | goto sticky_done; | |
429 | ||
280a9d34 | 430 | break; |
bb4dbf9e | 431 | #endif |
280a9d34 | 432 | default: |
333fad53 | 433 | goto sticky_done; |
280a9d34 | 434 | } |
333fad53 YH |
435 | } |
436 | ||
437 | retv = 0; | |
e7712f1a | 438 | opt = ipv6_update_options(sk, opt); |
333fad53 | 439 | sticky_done: |
45f6fad8 ED |
440 | if (opt) { |
441 | atomic_sub(opt->tot_len, &sk->sk_omem_alloc); | |
442 | txopt_put(opt); | |
443 | } | |
333fad53 YH |
444 | break; |
445 | } | |
446 | ||
b24a2516 YH |
447 | case IPV6_PKTINFO: |
448 | { | |
449 | struct in6_pktinfo pkt; | |
450 | ||
451 | if (optlen == 0) | |
452 | goto e_inval; | |
63159f29 | 453 | else if (optlen < sizeof(struct in6_pktinfo) || !optval) |
b24a2516 YH |
454 | goto e_inval; |
455 | ||
914d1164 | 456 | if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) { |
b24a2516 YH |
457 | retv = -EFAULT; |
458 | break; | |
459 | } | |
460 | if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if) | |
461 | goto e_inval; | |
462 | ||
463 | np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex; | |
4e3fd7a0 | 464 | np->sticky_pktinfo.ipi6_addr = pkt.ipi6_addr; |
b24a2516 YH |
465 | retv = 0; |
466 | break; | |
467 | } | |
468 | ||
333fad53 | 469 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
470 | { |
471 | struct ipv6_txoptions *opt = NULL; | |
472 | struct msghdr msg; | |
4c9483b2 | 473 | struct flowi6 fl6; |
ad1e46a8 | 474 | struct sockcm_cookie sockc_junk; |
26879da5 | 475 | struct ipcm6_cookie ipc6; |
1da177e4 | 476 | |
4c9483b2 DM |
477 | memset(&fl6, 0, sizeof(fl6)); |
478 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
479 | fl6.flowi6_mark = sk->sk_mark; | |
1da177e4 LT |
480 | |
481 | if (optlen == 0) | |
482 | goto update; | |
483 | ||
484 | /* 1K is probably excessive | |
485 | * 1K is surely not enough, 2K per standard header is 16K. | |
486 | */ | |
487 | retv = -EINVAL; | |
488 | if (optlen > 64*1024) | |
489 | break; | |
490 | ||
491 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
492 | retv = -ENOBUFS; | |
63159f29 | 493 | if (!opt) |
1da177e4 LT |
494 | break; |
495 | ||
496 | memset(opt, 0, sizeof(*opt)); | |
45f6fad8 | 497 | atomic_set(&opt->refcnt, 1); |
1da177e4 LT |
498 | opt->tot_len = sizeof(*opt) + optlen; |
499 | retv = -EFAULT; | |
500 | if (copy_from_user(opt+1, optval, optlen)) | |
501 | goto done; | |
502 | ||
503 | msg.msg_controllen = optlen; | |
67ba4152 | 504 | msg.msg_control = (void *)(opt+1); |
26879da5 | 505 | ipc6.opt = opt; |
1da177e4 | 506 | |
26879da5 | 507 | retv = ip6_datagram_send_ctl(net, sk, &msg, &fl6, &ipc6, &sockc_junk); |
1da177e4 LT |
508 | if (retv) |
509 | goto done; | |
510 | update: | |
511 | retv = 0; | |
e7712f1a | 512 | opt = ipv6_update_options(sk, opt); |
1da177e4 | 513 | done: |
45f6fad8 ED |
514 | if (opt) { |
515 | atomic_sub(opt->tot_len, &sk->sk_omem_alloc); | |
516 | txopt_put(opt); | |
517 | } | |
1da177e4 LT |
518 | break; |
519 | } | |
520 | case IPV6_UNICAST_HOPS: | |
b2a9d7c2 YH |
521 | if (optlen < sizeof(int)) |
522 | goto e_inval; | |
1da177e4 LT |
523 | if (val > 255 || val < -1) |
524 | goto e_inval; | |
525 | np->hop_limit = val; | |
526 | retv = 0; | |
527 | break; | |
528 | ||
529 | case IPV6_MULTICAST_HOPS: | |
530 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 531 | break; |
b2a9d7c2 YH |
532 | if (optlen < sizeof(int)) |
533 | goto e_inval; | |
1da177e4 LT |
534 | if (val > 255 || val < -1) |
535 | goto e_inval; | |
2a38e6d5 | 536 | np->mcast_hops = (val == -1 ? IPV6_DEFAULT_MCASTHOPS : val); |
1da177e4 LT |
537 | retv = 0; |
538 | break; | |
539 | ||
540 | case IPV6_MULTICAST_LOOP: | |
b2a9d7c2 YH |
541 | if (optlen < sizeof(int)) |
542 | goto e_inval; | |
28d44882 YH |
543 | if (val != valbool) |
544 | goto e_inval; | |
1da177e4 LT |
545 | np->mc_loop = valbool; |
546 | retv = 0; | |
547 | break; | |
548 | ||
c4062dfc EH |
549 | case IPV6_UNICAST_IF: |
550 | { | |
551 | struct net_device *dev = NULL; | |
552 | int ifindex; | |
553 | ||
554 | if (optlen != sizeof(int)) | |
555 | goto e_inval; | |
556 | ||
557 | ifindex = (__force int)ntohl((__force __be32)val); | |
558 | if (ifindex == 0) { | |
559 | np->ucast_oif = 0; | |
560 | retv = 0; | |
561 | break; | |
562 | } | |
563 | ||
564 | dev = dev_get_by_index(net, ifindex); | |
565 | retv = -EADDRNOTAVAIL; | |
566 | if (!dev) | |
567 | break; | |
568 | dev_put(dev); | |
569 | ||
570 | retv = -EINVAL; | |
571 | if (sk->sk_bound_dev_if) | |
572 | break; | |
573 | ||
574 | np->ucast_oif = ifindex; | |
575 | retv = 0; | |
576 | break; | |
577 | } | |
578 | ||
1da177e4 LT |
579 | case IPV6_MULTICAST_IF: |
580 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 581 | break; |
b2a9d7c2 YH |
582 | if (optlen < sizeof(int)) |
583 | goto e_inval; | |
1da177e4 | 584 | |
4953f0fc | 585 | if (val) { |
55b80503 ED |
586 | struct net_device *dev; |
587 | ||
4953f0fc BH |
588 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) |
589 | goto e_inval; | |
590 | ||
55b80503 ED |
591 | dev = dev_get_by_index(net, val); |
592 | if (!dev) { | |
4953f0fc BH |
593 | retv = -ENODEV; |
594 | break; | |
595 | } | |
55b80503 | 596 | dev_put(dev); |
1da177e4 LT |
597 | } |
598 | np->mcast_oif = val; | |
599 | retv = 0; | |
600 | break; | |
601 | case IPV6_ADD_MEMBERSHIP: | |
602 | case IPV6_DROP_MEMBERSHIP: | |
603 | { | |
604 | struct ipv6_mreq mreq; | |
605 | ||
a28398ba WC |
606 | if (optlen < sizeof(struct ipv6_mreq)) |
607 | goto e_inval; | |
608 | ||
a96fb49b FL |
609 | retv = -EPROTO; |
610 | if (inet_sk(sk)->is_icsk) | |
611 | break; | |
612 | ||
1da177e4 LT |
613 | retv = -EFAULT; |
614 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
615 | break; | |
616 | ||
617 | if (optname == IPV6_ADD_MEMBERSHIP) | |
54ff9ef3 | 618 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); |
1da177e4 | 619 | else |
54ff9ef3 | 620 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); |
1da177e4 LT |
621 | break; |
622 | } | |
623 | case IPV6_JOIN_ANYCAST: | |
624 | case IPV6_LEAVE_ANYCAST: | |
625 | { | |
626 | struct ipv6_mreq mreq; | |
627 | ||
a28398ba | 628 | if (optlen < sizeof(struct ipv6_mreq)) |
1da177e4 LT |
629 | goto e_inval; |
630 | ||
631 | retv = -EFAULT; | |
632 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
633 | break; | |
634 | ||
635 | if (optname == IPV6_JOIN_ANYCAST) | |
636 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
637 | else | |
638 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
639 | break; | |
640 | } | |
641 | case MCAST_JOIN_GROUP: | |
642 | case MCAST_LEAVE_GROUP: | |
643 | { | |
644 | struct group_req greq; | |
645 | struct sockaddr_in6 *psin6; | |
646 | ||
a28398ba WC |
647 | if (optlen < sizeof(struct group_req)) |
648 | goto e_inval; | |
649 | ||
1da177e4 LT |
650 | retv = -EFAULT; |
651 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
652 | break; | |
653 | if (greq.gr_group.ss_family != AF_INET6) { | |
654 | retv = -EADDRNOTAVAIL; | |
655 | break; | |
656 | } | |
657 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
658 | if (optname == MCAST_JOIN_GROUP) | |
54ff9ef3 MRL |
659 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, |
660 | &psin6->sin6_addr); | |
1da177e4 | 661 | else |
54ff9ef3 MRL |
662 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, |
663 | &psin6->sin6_addr); | |
1da177e4 LT |
664 | break; |
665 | } | |
666 | case MCAST_JOIN_SOURCE_GROUP: | |
667 | case MCAST_LEAVE_SOURCE_GROUP: | |
668 | case MCAST_BLOCK_SOURCE: | |
669 | case MCAST_UNBLOCK_SOURCE: | |
670 | { | |
671 | struct group_source_req greqs; | |
672 | int omode, add; | |
673 | ||
a28398ba | 674 | if (optlen < sizeof(struct group_source_req)) |
1da177e4 LT |
675 | goto e_inval; |
676 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
677 | retv = -EFAULT; | |
678 | break; | |
679 | } | |
680 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
681 | greqs.gsr_source.ss_family != AF_INET6) { | |
682 | retv = -EADDRNOTAVAIL; | |
683 | break; | |
684 | } | |
685 | if (optname == MCAST_BLOCK_SOURCE) { | |
686 | omode = MCAST_EXCLUDE; | |
687 | add = 1; | |
688 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
689 | omode = MCAST_EXCLUDE; | |
690 | add = 0; | |
691 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
692 | struct sockaddr_in6 *psin6; | |
693 | ||
694 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
54ff9ef3 MRL |
695 | retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, |
696 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
697 | /* prior join w/ different source is ok */ |
698 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
699 | break; |
700 | omode = MCAST_INCLUDE; | |
701 | add = 1; | |
c9e3e8b6 | 702 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
703 | omode = MCAST_INCLUDE; |
704 | add = 0; | |
705 | } | |
706 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
707 | break; | |
708 | } | |
709 | case MCAST_MSFILTER: | |
710 | { | |
1da177e4 LT |
711 | struct group_filter *gsf; |
712 | ||
713 | if (optlen < GROUP_FILTER_SIZE(0)) | |
714 | goto e_inval; | |
715 | if (optlen > sysctl_optmem_max) { | |
716 | retv = -ENOBUFS; | |
717 | break; | |
718 | } | |
67ba4152 | 719 | gsf = kmalloc(optlen, GFP_KERNEL); |
cfcabdcc | 720 | if (!gsf) { |
1da177e4 LT |
721 | retv = -ENOBUFS; |
722 | break; | |
723 | } | |
724 | retv = -EFAULT; | |
725 | if (copy_from_user(gsf, optval, optlen)) { | |
726 | kfree(gsf); | |
727 | break; | |
728 | } | |
729 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
730 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
731 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
732 | kfree(gsf); | |
733 | retv = -ENOBUFS; | |
734 | break; | |
735 | } | |
736 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
737 | kfree(gsf); | |
738 | retv = -EINVAL; | |
739 | break; | |
740 | } | |
741 | retv = ip6_mc_msfilter(sk, gsf); | |
742 | kfree(gsf); | |
743 | ||
744 | break; | |
745 | } | |
746 | case IPV6_ROUTER_ALERT: | |
b2a9d7c2 YH |
747 | if (optlen < sizeof(int)) |
748 | goto e_inval; | |
725a8ff0 | 749 | retv = ip6_ra_control(sk, val); |
1da177e4 LT |
750 | break; |
751 | case IPV6_MTU_DISCOVER: | |
b2a9d7c2 YH |
752 | if (optlen < sizeof(int)) |
753 | goto e_inval; | |
0b95227a | 754 | if (val < IPV6_PMTUDISC_DONT || val > IPV6_PMTUDISC_OMIT) |
1da177e4 LT |
755 | goto e_inval; |
756 | np->pmtudisc = val; | |
757 | retv = 0; | |
758 | break; | |
759 | case IPV6_MTU: | |
b2a9d7c2 YH |
760 | if (optlen < sizeof(int)) |
761 | goto e_inval; | |
1da177e4 LT |
762 | if (val && val < IPV6_MIN_MTU) |
763 | goto e_inval; | |
764 | np->frag_size = val; | |
765 | retv = 0; | |
766 | break; | |
767 | case IPV6_RECVERR: | |
b2a9d7c2 YH |
768 | if (optlen < sizeof(int)) |
769 | goto e_inval; | |
1da177e4 LT |
770 | np->recverr = valbool; |
771 | if (!val) | |
772 | skb_queue_purge(&sk->sk_error_queue); | |
773 | retv = 0; | |
774 | break; | |
775 | case IPV6_FLOWINFO_SEND: | |
b2a9d7c2 YH |
776 | if (optlen < sizeof(int)) |
777 | goto e_inval; | |
1da177e4 LT |
778 | np->sndflow = valbool; |
779 | retv = 0; | |
780 | break; | |
781 | case IPV6_FLOWLABEL_MGR: | |
782 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
783 | break; | |
784 | case IPV6_IPSEC_POLICY: | |
785 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 | 786 | retv = -EPERM; |
af31f412 | 787 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
6fc0b4a7 | 788 | break; |
1da177e4 LT |
789 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
790 | break; | |
791 | ||
7cbca67c YH |
792 | case IPV6_ADDR_PREFERENCES: |
793 | { | |
794 | unsigned int pref = 0; | |
795 | unsigned int prefmask = ~0; | |
796 | ||
b2a9d7c2 YH |
797 | if (optlen < sizeof(int)) |
798 | goto e_inval; | |
799 | ||
7cbca67c YH |
800 | retv = -EINVAL; |
801 | ||
802 | /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ | |
803 | switch (val & (IPV6_PREFER_SRC_PUBLIC| | |
804 | IPV6_PREFER_SRC_TMP| | |
805 | IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { | |
806 | case IPV6_PREFER_SRC_PUBLIC: | |
807 | pref |= IPV6_PREFER_SRC_PUBLIC; | |
808 | break; | |
809 | case IPV6_PREFER_SRC_TMP: | |
810 | pref |= IPV6_PREFER_SRC_TMP; | |
811 | break; | |
812 | case IPV6_PREFER_SRC_PUBTMP_DEFAULT: | |
813 | break; | |
814 | case 0: | |
815 | goto pref_skip_pubtmp; | |
816 | default: | |
817 | goto e_inval; | |
818 | } | |
819 | ||
820 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| | |
821 | IPV6_PREFER_SRC_TMP); | |
822 | pref_skip_pubtmp: | |
823 | ||
824 | /* check HOME/COA conflicts */ | |
825 | switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { | |
826 | case IPV6_PREFER_SRC_HOME: | |
827 | break; | |
828 | case IPV6_PREFER_SRC_COA: | |
829 | pref |= IPV6_PREFER_SRC_COA; | |
830 | case 0: | |
831 | goto pref_skip_coa; | |
832 | default: | |
833 | goto e_inval; | |
834 | } | |
835 | ||
836 | prefmask &= ~IPV6_PREFER_SRC_COA; | |
837 | pref_skip_coa: | |
838 | ||
839 | /* check CGA/NONCGA conflicts */ | |
840 | switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { | |
841 | case IPV6_PREFER_SRC_CGA: | |
842 | case IPV6_PREFER_SRC_NONCGA: | |
843 | case 0: | |
844 | break; | |
845 | default: | |
846 | goto e_inval; | |
847 | } | |
848 | ||
849 | np->srcprefs = (np->srcprefs & prefmask) | pref; | |
850 | retv = 0; | |
851 | ||
852 | break; | |
853 | } | |
e802af9c SH |
854 | case IPV6_MINHOPCOUNT: |
855 | if (optlen < sizeof(int)) | |
856 | goto e_inval; | |
857 | if (val < 0 || val > 255) | |
858 | goto e_inval; | |
859 | np->min_hopcount = val; | |
d4596bad | 860 | retv = 0; |
793b1473 BH |
861 | break; |
862 | case IPV6_DONTFRAG: | |
863 | np->dontfrag = valbool; | |
e802af9c SH |
864 | retv = 0; |
865 | break; | |
cb1ce2ef TH |
866 | case IPV6_AUTOFLOWLABEL: |
867 | np->autoflowlabel = valbool; | |
868 | retv = 0; | |
869 | break; | |
1da177e4 | 870 | } |
7cbca67c | 871 | |
1da177e4 | 872 | release_sock(sk); |
baf606d9 MRL |
873 | if (needs_rtnl) |
874 | rtnl_unlock(); | |
1da177e4 | 875 | |
1da177e4 LT |
876 | return retv; |
877 | ||
878 | e_inval: | |
879 | release_sock(sk); | |
baf606d9 MRL |
880 | if (needs_rtnl) |
881 | rtnl_unlock(); | |
1da177e4 LT |
882 | return -EINVAL; |
883 | } | |
884 | ||
3fdadf7d | 885 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 886 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
887 | { |
888 | int err; | |
889 | ||
890 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
891 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
892 | ||
893 | if (level != SOL_IPV6) | |
894 | return -ENOPROTOOPT; | |
895 | ||
896 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
897 | #ifdef CONFIG_NETFILTER | |
898 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
899 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
900 | optname != IPV6_XFRM_POLICY) { | |
901 | lock_sock(sk); | |
902 | err = nf_setsockopt(sk, PF_INET6, optname, optval, | |
903 | optlen); | |
904 | release_sock(sk); | |
905 | } | |
906 | #endif | |
907 | return err; | |
908 | } | |
7159039a | 909 | EXPORT_SYMBOL(ipv6_setsockopt); |
3fdadf7d DM |
910 | |
911 | #ifdef CONFIG_COMPAT | |
912 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
b7058842 | 913 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
914 | { |
915 | int err; | |
916 | ||
917 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
918 | if (udp_prot.compat_setsockopt != NULL) |
919 | return udp_prot.compat_setsockopt(sk, level, optname, | |
920 | optval, optlen); | |
921 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
922 | } |
923 | ||
924 | if (level != SOL_IPV6) | |
925 | return -ENOPROTOOPT; | |
926 | ||
dae50295 DS |
927 | if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) |
928 | return compat_mc_setsockopt(sk, level, optname, optval, optlen, | |
929 | ipv6_setsockopt); | |
930 | ||
3fdadf7d DM |
931 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); |
932 | #ifdef CONFIG_NETFILTER | |
933 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
934 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
543d9cfe | 935 | optname != IPV6_XFRM_POLICY) { |
3fdadf7d | 936 | lock_sock(sk); |
543d9cfe ACM |
937 | err = compat_nf_setsockopt(sk, PF_INET6, optname, |
938 | optval, optlen); | |
3fdadf7d DM |
939 | release_sock(sk); |
940 | } | |
941 | #endif | |
942 | return err; | |
943 | } | |
543d9cfe | 944 | EXPORT_SYMBOL(compat_ipv6_setsockopt); |
3fdadf7d DM |
945 | #endif |
946 | ||
28693079 | 947 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, |
4c6510a7 | 948 | int optname, char __user *optval, int len) |
333fad53 | 949 | { |
28693079 DM |
950 | struct ipv6_opt_hdr *hdr; |
951 | ||
4c6510a7 YH |
952 | if (!opt) |
953 | return 0; | |
954 | ||
67ba4152 | 955 | switch (optname) { |
4c6510a7 YH |
956 | case IPV6_HOPOPTS: |
957 | hdr = opt->hopopt; | |
958 | break; | |
959 | case IPV6_RTHDRDSTOPTS: | |
960 | hdr = opt->dst0opt; | |
961 | break; | |
962 | case IPV6_RTHDR: | |
963 | hdr = (struct ipv6_opt_hdr *)opt->srcrt; | |
964 | break; | |
965 | case IPV6_DSTOPTS: | |
966 | hdr = opt->dst1opt; | |
967 | break; | |
968 | default: | |
969 | return -EINVAL; /* should not happen */ | |
970 | } | |
971 | ||
972 | if (!hdr) | |
333fad53 | 973 | return 0; |
28693079 | 974 | |
d2b02ed9 | 975 | len = min_t(unsigned int, len, ipv6_optlen(hdr)); |
660adc6e | 976 | if (copy_to_user(optval, hdr, len)) |
333fad53 | 977 | return -EFAULT; |
95b496b6 | 978 | return len; |
333fad53 YH |
979 | } |
980 | ||
3fdadf7d | 981 | static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
95c96174 | 982 | char __user *optval, int __user *optlen, unsigned int flags) |
1da177e4 LT |
983 | { |
984 | struct ipv6_pinfo *np = inet6_sk(sk); | |
985 | int len; | |
986 | int val; | |
987 | ||
7bc570c8 YH |
988 | if (ip6_mroute_opt(optname)) |
989 | return ip6_mroute_getsockopt(sk, optname, optval, optlen); | |
990 | ||
1da177e4 LT |
991 | if (get_user(len, optlen)) |
992 | return -EFAULT; | |
993 | switch (optname) { | |
994 | case IPV6_ADDRFORM: | |
995 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 996 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 | 997 | sk->sk_protocol != IPPROTO_TCP) |
1717699c | 998 | return -ENOPROTOOPT; |
1da177e4 LT |
999 | if (sk->sk_state != TCP_ESTABLISHED) |
1000 | return -ENOTCONN; | |
1001 | val = sk->sk_family; | |
1002 | break; | |
1003 | case MCAST_MSFILTER: | |
1004 | { | |
1005 | struct group_filter gsf; | |
1006 | int err; | |
1007 | ||
1008 | if (len < GROUP_FILTER_SIZE(0)) | |
1009 | return -EINVAL; | |
1010 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
1011 | return -EFAULT; | |
20c61fbd YH |
1012 | if (gsf.gf_group.ss_family != AF_INET6) |
1013 | return -EADDRNOTAVAIL; | |
1da177e4 LT |
1014 | lock_sock(sk); |
1015 | err = ip6_mc_msfget(sk, &gsf, | |
1016 | (struct group_filter __user *)optval, optlen); | |
1017 | release_sock(sk); | |
1018 | return err; | |
1019 | } | |
1020 | ||
333fad53 | 1021 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
1022 | { |
1023 | struct msghdr msg; | |
1024 | struct sk_buff *skb; | |
1025 | ||
1026 | if (sk->sk_type != SOCK_STREAM) | |
1027 | return -ENOPROTOOPT; | |
1028 | ||
1029 | msg.msg_control = optval; | |
1030 | msg.msg_controllen = len; | |
98e77438 | 1031 | msg.msg_flags = flags; |
1da177e4 LT |
1032 | |
1033 | lock_sock(sk); | |
1034 | skb = np->pktoptions; | |
1035 | if (skb) | |
4b261c75 | 1036 | ip6_datagram_recv_ctl(sk, &msg, skb); |
1dc7b90f ED |
1037 | release_sock(sk); |
1038 | if (!skb) { | |
1da177e4 LT |
1039 | if (np->rxopt.bits.rxinfo) { |
1040 | struct in6_pktinfo src_info; | |
f250dcda YH |
1041 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
1042 | np->sticky_pktinfo.ipi6_ifindex; | |
efe4208f | 1043 | src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : np->sticky_pktinfo.ipi6_addr; |
1da177e4 LT |
1044 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); |
1045 | } | |
1046 | if (np->rxopt.bits.rxhlim) { | |
1047 | int hlim = np->mcast_hops; | |
1048 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
1049 | } | |
4c507d28 | 1050 | if (np->rxopt.bits.rxtclass) { |
d76ed22b LR |
1051 | int tclass = (int)ip6_tclass(np->rcv_flowinfo); |
1052 | ||
4c507d28 JB |
1053 | put_cmsg(&msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass); |
1054 | } | |
333fad53 YH |
1055 | if (np->rxopt.bits.rxoinfo) { |
1056 | struct in6_pktinfo src_info; | |
f250dcda YH |
1057 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
1058 | np->sticky_pktinfo.ipi6_ifindex; | |
efe4208f ED |
1059 | src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : |
1060 | np->sticky_pktinfo.ipi6_addr; | |
333fad53 YH |
1061 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); |
1062 | } | |
1063 | if (np->rxopt.bits.rxohlim) { | |
1064 | int hlim = np->mcast_hops; | |
1065 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
1066 | } | |
1397ed35 | 1067 | if (np->rxopt.bits.rxflow) { |
68536053 FF |
1068 | __be32 flowinfo = np->rcv_flowinfo; |
1069 | ||
1397ed35 FF |
1070 | put_cmsg(&msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo); |
1071 | } | |
1da177e4 LT |
1072 | } |
1073 | len -= msg.msg_controllen; | |
1074 | return put_user(len, optlen); | |
1075 | } | |
1076 | case IPV6_MTU: | |
1077 | { | |
1078 | struct dst_entry *dst; | |
b6c6712a | 1079 | |
1ab1457c | 1080 | val = 0; |
b6c6712a ED |
1081 | rcu_read_lock(); |
1082 | dst = __sk_dst_get(sk); | |
1083 | if (dst) | |
1da177e4 | 1084 | val = dst_mtu(dst); |
b6c6712a | 1085 | rcu_read_unlock(); |
1da177e4 LT |
1086 | if (!val) |
1087 | return -ENOTCONN; | |
1088 | break; | |
1089 | } | |
1090 | ||
1091 | case IPV6_V6ONLY: | |
9fe516ba | 1092 | val = sk->sk_ipv6only; |
1da177e4 LT |
1093 | break; |
1094 | ||
333fad53 | 1095 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
1096 | val = np->rxopt.bits.rxinfo; |
1097 | break; | |
1098 | ||
333fad53 YH |
1099 | case IPV6_2292PKTINFO: |
1100 | val = np->rxopt.bits.rxoinfo; | |
1101 | break; | |
1102 | ||
1103 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
1104 | val = np->rxopt.bits.rxhlim; |
1105 | break; | |
1106 | ||
333fad53 YH |
1107 | case IPV6_2292HOPLIMIT: |
1108 | val = np->rxopt.bits.rxohlim; | |
1109 | break; | |
1110 | ||
1111 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
1112 | val = np->rxopt.bits.srcrt; |
1113 | break; | |
1114 | ||
333fad53 YH |
1115 | case IPV6_2292RTHDR: |
1116 | val = np->rxopt.bits.osrcrt; | |
1117 | break; | |
1118 | ||
1da177e4 | 1119 | case IPV6_HOPOPTS: |
333fad53 YH |
1120 | case IPV6_RTHDRDSTOPTS: |
1121 | case IPV6_RTHDR: | |
1122 | case IPV6_DSTOPTS: | |
1123 | { | |
45f6fad8 | 1124 | struct ipv6_txoptions *opt; |
333fad53 YH |
1125 | |
1126 | lock_sock(sk); | |
1e1d04e6 HFS |
1127 | opt = rcu_dereference_protected(np->opt, |
1128 | lockdep_sock_is_held(sk)); | |
45f6fad8 | 1129 | len = ipv6_getsockopt_sticky(sk, opt, optname, optval, len); |
333fad53 | 1130 | release_sock(sk); |
05335c22 YH |
1131 | /* check if ipv6_getsockopt_sticky() returns err code */ |
1132 | if (len < 0) | |
1133 | return len; | |
333fad53 YH |
1134 | return put_user(len, optlen); |
1135 | } | |
1136 | ||
1137 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
1138 | val = np->rxopt.bits.hopopts; |
1139 | break; | |
1140 | ||
333fad53 YH |
1141 | case IPV6_2292HOPOPTS: |
1142 | val = np->rxopt.bits.ohopopts; | |
1143 | break; | |
1144 | ||
1145 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
1146 | val = np->rxopt.bits.dstopts; |
1147 | break; | |
1148 | ||
333fad53 YH |
1149 | case IPV6_2292DSTOPTS: |
1150 | val = np->rxopt.bits.odstopts; | |
1151 | break; | |
1152 | ||
41a1f8ea YH |
1153 | case IPV6_TCLASS: |
1154 | val = np->tclass; | |
1155 | break; | |
1156 | ||
1157 | case IPV6_RECVTCLASS: | |
1158 | val = np->rxopt.bits.rxtclass; | |
1159 | break; | |
1160 | ||
1da177e4 LT |
1161 | case IPV6_FLOWINFO: |
1162 | val = np->rxopt.bits.rxflow; | |
1163 | break; | |
1164 | ||
793b1473 BH |
1165 | case IPV6_RECVPATHMTU: |
1166 | val = np->rxopt.bits.rxpmtu; | |
1167 | break; | |
1168 | ||
1169 | case IPV6_PATHMTU: | |
1170 | { | |
1171 | struct dst_entry *dst; | |
1172 | struct ip6_mtuinfo mtuinfo; | |
1173 | ||
1174 | if (len < sizeof(mtuinfo)) | |
1175 | return -EINVAL; | |
1176 | ||
1177 | len = sizeof(mtuinfo); | |
1178 | memset(&mtuinfo, 0, sizeof(mtuinfo)); | |
1179 | ||
1180 | rcu_read_lock(); | |
1181 | dst = __sk_dst_get(sk); | |
1182 | if (dst) | |
1183 | mtuinfo.ip6m_mtu = dst_mtu(dst); | |
1184 | rcu_read_unlock(); | |
1185 | if (!mtuinfo.ip6m_mtu) | |
1186 | return -ENOTCONN; | |
1187 | ||
1188 | if (put_user(len, optlen)) | |
1189 | return -EFAULT; | |
1190 | if (copy_to_user(optval, &mtuinfo, len)) | |
1191 | return -EFAULT; | |
1192 | ||
1193 | return 0; | |
793b1473 BH |
1194 | } |
1195 | ||
6c468622 BS |
1196 | case IPV6_TRANSPARENT: |
1197 | val = inet_sk(sk)->transparent; | |
1198 | break; | |
1199 | ||
1200 | case IPV6_RECVORIGDSTADDR: | |
1201 | val = np->rxopt.bits.rxorigdstaddr; | |
1202 | break; | |
1203 | ||
1da177e4 | 1204 | case IPV6_UNICAST_HOPS: |
1da177e4 | 1205 | case IPV6_MULTICAST_HOPS: |
befffe90 BH |
1206 | { |
1207 | struct dst_entry *dst; | |
1208 | ||
1209 | if (optname == IPV6_UNICAST_HOPS) | |
1210 | val = np->hop_limit; | |
1211 | else | |
1212 | val = np->mcast_hops; | |
1213 | ||
b6c6712a ED |
1214 | if (val < 0) { |
1215 | rcu_read_lock(); | |
1216 | dst = __sk_dst_get(sk); | |
1217 | if (dst) | |
6b75d090 | 1218 | val = ip6_dst_hoplimit(dst); |
b6c6712a | 1219 | rcu_read_unlock(); |
befffe90 | 1220 | } |
b6c6712a | 1221 | |
befffe90 | 1222 | if (val < 0) |
53b7997f | 1223 | val = sock_net(sk)->ipv6.devconf_all->hop_limit; |
1da177e4 | 1224 | break; |
befffe90 | 1225 | } |
1da177e4 LT |
1226 | |
1227 | case IPV6_MULTICAST_LOOP: | |
1228 | val = np->mc_loop; | |
1229 | break; | |
1230 | ||
1231 | case IPV6_MULTICAST_IF: | |
1232 | val = np->mcast_oif; | |
1233 | break; | |
1234 | ||
c4062dfc EH |
1235 | case IPV6_UNICAST_IF: |
1236 | val = (__force int)htonl((__u32) np->ucast_oif); | |
1237 | break; | |
1238 | ||
1da177e4 LT |
1239 | case IPV6_MTU_DISCOVER: |
1240 | val = np->pmtudisc; | |
1241 | break; | |
1242 | ||
1243 | case IPV6_RECVERR: | |
1244 | val = np->recverr; | |
1245 | break; | |
1246 | ||
1247 | case IPV6_FLOWINFO_SEND: | |
1248 | val = np->sndflow; | |
1249 | break; | |
1250 | ||
3fdfa5ff FF |
1251 | case IPV6_FLOWLABEL_MGR: |
1252 | { | |
1253 | struct in6_flowlabel_req freq; | |
46e5f401 | 1254 | int flags; |
3fdfa5ff FF |
1255 | |
1256 | if (len < sizeof(freq)) | |
1257 | return -EINVAL; | |
1258 | ||
1259 | if (copy_from_user(&freq, optval, sizeof(freq))) | |
1260 | return -EFAULT; | |
1261 | ||
1262 | if (freq.flr_action != IPV6_FL_A_GET) | |
1263 | return -EINVAL; | |
1264 | ||
1265 | len = sizeof(freq); | |
46e5f401 FF |
1266 | flags = freq.flr_flags; |
1267 | ||
3fdfa5ff FF |
1268 | memset(&freq, 0, sizeof(freq)); |
1269 | ||
46e5f401 | 1270 | val = ipv6_flowlabel_opt_get(sk, &freq, flags); |
3fdfa5ff FF |
1271 | if (val < 0) |
1272 | return val; | |
1273 | ||
1274 | if (put_user(len, optlen)) | |
1275 | return -EFAULT; | |
1276 | if (copy_to_user(optval, &freq, len)) | |
1277 | return -EFAULT; | |
1278 | ||
1279 | return 0; | |
1280 | } | |
1281 | ||
7cbca67c YH |
1282 | case IPV6_ADDR_PREFERENCES: |
1283 | val = 0; | |
1284 | ||
1285 | if (np->srcprefs & IPV6_PREFER_SRC_TMP) | |
1286 | val |= IPV6_PREFER_SRC_TMP; | |
1287 | else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) | |
1288 | val |= IPV6_PREFER_SRC_PUBLIC; | |
1289 | else { | |
1290 | /* XXX: should we return system default? */ | |
1291 | val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; | |
1292 | } | |
1293 | ||
1294 | if (np->srcprefs & IPV6_PREFER_SRC_COA) | |
1295 | val |= IPV6_PREFER_SRC_COA; | |
1296 | else | |
1297 | val |= IPV6_PREFER_SRC_HOME; | |
1298 | break; | |
e802af9c SH |
1299 | |
1300 | case IPV6_MINHOPCOUNT: | |
1301 | val = np->min_hopcount; | |
1302 | break; | |
793b1473 BH |
1303 | |
1304 | case IPV6_DONTFRAG: | |
1305 | val = np->dontfrag; | |
1306 | break; | |
7cbca67c | 1307 | |
cb1ce2ef TH |
1308 | case IPV6_AUTOFLOWLABEL: |
1309 | val = np->autoflowlabel; | |
1310 | break; | |
1311 | ||
1da177e4 | 1312 | default: |
cf6fc4a9 | 1313 | return -ENOPROTOOPT; |
1da177e4 LT |
1314 | } |
1315 | len = min_t(unsigned int, sizeof(int), len); | |
67ba4152 | 1316 | if (put_user(len, optlen)) |
1da177e4 | 1317 | return -EFAULT; |
67ba4152 | 1318 | if (copy_to_user(optval, &val, len)) |
1da177e4 LT |
1319 | return -EFAULT; |
1320 | return 0; | |
1321 | } | |
1322 | ||
3fdadf7d DM |
1323 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1324 | char __user *optval, int __user *optlen) | |
1325 | { | |
1326 | int err; | |
1327 | ||
1328 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
1329 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
1330 | ||
67ba4152 | 1331 | if (level != SOL_IPV6) |
3fdadf7d DM |
1332 | return -ENOPROTOOPT; |
1333 | ||
98e77438 | 1334 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 0); |
3fdadf7d | 1335 | #ifdef CONFIG_NETFILTER |
cf6fc4a9 WY |
1336 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1337 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1338 | int len; |
1339 | ||
1340 | if (get_user(len, optlen)) | |
1341 | return -EFAULT; | |
1342 | ||
1343 | lock_sock(sk); | |
1344 | err = nf_getsockopt(sk, PF_INET6, optname, optval, | |
1345 | &len); | |
1346 | release_sock(sk); | |
1347 | if (err >= 0) | |
1348 | err = put_user(len, optlen); | |
1349 | } | |
1350 | #endif | |
1351 | return err; | |
1352 | } | |
7159039a YH |
1353 | EXPORT_SYMBOL(ipv6_getsockopt); |
1354 | ||
3fdadf7d DM |
1355 | #ifdef CONFIG_COMPAT |
1356 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1357 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
1358 | { |
1359 | int err; | |
1360 | ||
1361 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
1362 | if (udp_prot.compat_getsockopt != NULL) |
1363 | return udp_prot.compat_getsockopt(sk, level, optname, | |
1364 | optval, optlen); | |
1365 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
1366 | } |
1367 | ||
543d9cfe | 1368 | if (level != SOL_IPV6) |
3fdadf7d DM |
1369 | return -ENOPROTOOPT; |
1370 | ||
80991790 PE |
1371 | if (optname == MCAST_MSFILTER) |
1372 | return compat_mc_getsockopt(sk, level, optname, optval, optlen, | |
1373 | ipv6_getsockopt); | |
1374 | ||
98e77438 DB |
1375 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, |
1376 | MSG_CMSG_COMPAT); | |
3fdadf7d | 1377 | #ifdef CONFIG_NETFILTER |
cf6fc4a9 WY |
1378 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1379 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1380 | int len; |
1381 | ||
1382 | if (get_user(len, optlen)) | |
1383 | return -EFAULT; | |
1384 | ||
1385 | lock_sock(sk); | |
543d9cfe ACM |
1386 | err = compat_nf_getsockopt(sk, PF_INET6, |
1387 | optname, optval, &len); | |
3fdadf7d DM |
1388 | release_sock(sk); |
1389 | if (err >= 0) | |
1390 | err = put_user(len, optlen); | |
1391 | } | |
1392 | #endif | |
1393 | return err; | |
1394 | } | |
543d9cfe | 1395 | EXPORT_SYMBOL(compat_ipv6_getsockopt); |
3fdadf7d DM |
1396 | #endif |
1397 |