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 | static |
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) { | |
124 | case IPV6_ADD_MEMBERSHIP: | |
125 | case IPV6_DROP_MEMBERSHIP: | |
c4a6853d MRL |
126 | case IPV6_JOIN_ANYCAST: |
127 | case IPV6_LEAVE_ANYCAST: | |
baf606d9 MRL |
128 | case MCAST_JOIN_GROUP: |
129 | case MCAST_LEAVE_GROUP: | |
54ff9ef3 MRL |
130 | case MCAST_JOIN_SOURCE_GROUP: |
131 | case MCAST_LEAVE_SOURCE_GROUP: | |
132 | case MCAST_BLOCK_SOURCE: | |
133 | case MCAST_UNBLOCK_SOURCE: | |
134 | case MCAST_MSFILTER: | |
baf606d9 MRL |
135 | return true; |
136 | } | |
137 | return false; | |
138 | } | |
139 | ||
3fdadf7d | 140 | static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 141 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
142 | { |
143 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 144 | struct net *net = sock_net(sk); |
1da177e4 LT |
145 | int val, valbool; |
146 | int retv = -ENOPROTOOPT; | |
baf606d9 | 147 | bool needs_rtnl = setsockopt_needs_rtnl(optname); |
1da177e4 | 148 | |
63159f29 | 149 | if (!optval) |
67ba4152 | 150 | val = 0; |
b2a9d7c2 YH |
151 | else { |
152 | if (optlen >= sizeof(int)) { | |
153 | if (get_user(val, (int __user *) optval)) | |
154 | return -EFAULT; | |
155 | } else | |
156 | val = 0; | |
157 | } | |
1da177e4 | 158 | |
67ba4152 | 159 | valbool = (val != 0); |
1da177e4 | 160 | |
7bc570c8 YH |
161 | if (ip6_mroute_opt(optname)) |
162 | return ip6_mroute_setsockopt(sk, optname, optval, optlen); | |
163 | ||
baf606d9 MRL |
164 | if (needs_rtnl) |
165 | rtnl_lock(); | |
1da177e4 LT |
166 | lock_sock(sk); |
167 | ||
168 | switch (optname) { | |
169 | ||
170 | case IPV6_ADDRFORM: | |
b2a9d7c2 YH |
171 | if (optlen < sizeof(int)) |
172 | goto e_inval; | |
1da177e4 LT |
173 | if (val == PF_INET) { |
174 | struct ipv6_txoptions *opt; | |
175 | struct sk_buff *pktopt; | |
176 | ||
49d074f4 DL |
177 | if (sk->sk_type == SOCK_RAW) |
178 | break; | |
179 | ||
9596cc82 DL |
180 | if (sk->sk_protocol == IPPROTO_UDP || |
181 | sk->sk_protocol == IPPROTO_UDPLITE) { | |
182 | struct udp_sock *up = udp_sk(sk); | |
183 | if (up->pending == AF_INET6) { | |
184 | retv = -EBUSY; | |
185 | break; | |
186 | } | |
187 | } else if (sk->sk_protocol != IPPROTO_TCP) | |
1da177e4 LT |
188 | break; |
189 | ||
190 | if (sk->sk_state != TCP_ESTABLISHED) { | |
191 | retv = -ENOTCONN; | |
192 | break; | |
193 | } | |
194 | ||
195 | if (ipv6_only_sock(sk) || | |
efe4208f | 196 | !ipv6_addr_v4mapped(&sk->sk_v6_daddr)) { |
1da177e4 LT |
197 | retv = -EADDRNOTAVAIL; |
198 | break; | |
199 | } | |
200 | ||
201 | fl6_free_socklist(sk); | |
202 | ipv6_sock_mc_close(sk); | |
203 | ||
e6848976 ACM |
204 | /* |
205 | * Sock is moving from IPv6 to IPv4 (sk_prot), so | |
206 | * remove it from the refcnt debug socks count in the | |
207 | * original family... | |
208 | */ | |
209 | sk_refcnt_debug_dec(sk); | |
210 | ||
1da177e4 | 211 | if (sk->sk_protocol == IPPROTO_TCP) { |
d83d8461 | 212 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 | 213 | local_bh_disable(); |
c29a0bc4 PE |
214 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
215 | sock_prot_inuse_add(net, &tcp_prot, 1); | |
1da177e4 LT |
216 | local_bh_enable(); |
217 | sk->sk_prot = &tcp_prot; | |
d83d8461 | 218 | icsk->icsk_af_ops = &ipv4_specific; |
1da177e4 LT |
219 | sk->sk_socket->ops = &inet_stream_ops; |
220 | sk->sk_family = PF_INET; | |
d83d8461 | 221 | tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); |
1da177e4 | 222 | } else { |
ba4e58ec GR |
223 | struct proto *prot = &udp_prot; |
224 | ||
db8dac20 | 225 | if (sk->sk_protocol == IPPROTO_UDPLITE) |
ba4e58ec | 226 | prot = &udplite_prot; |
1da177e4 | 227 | local_bh_disable(); |
c29a0bc4 PE |
228 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
229 | sock_prot_inuse_add(net, prot, 1); | |
1da177e4 | 230 | local_bh_enable(); |
ba4e58ec | 231 | sk->sk_prot = prot; |
1da177e4 LT |
232 | sk->sk_socket->ops = &inet_dgram_ops; |
233 | sk->sk_family = PF_INET; | |
234 | } | |
45f6fad8 ED |
235 | opt = xchg((__force struct ipv6_txoptions **)&np->opt, |
236 | NULL); | |
237 | if (opt) { | |
238 | atomic_sub(opt->tot_len, &sk->sk_omem_alloc); | |
239 | txopt_put(opt); | |
240 | } | |
1da177e4 | 241 | pktopt = xchg(&np->pktoptions, NULL); |
800d55f1 | 242 | kfree_skb(pktopt); |
1da177e4 LT |
243 | |
244 | sk->sk_destruct = inet_sock_destruct; | |
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 | ||
380 | case IPV6_RECVORIGDSTADDR: | |
381 | if (optlen < sizeof(int)) | |
382 | goto e_inval; | |
383 | np->rxopt.bits.rxorigdstaddr = valbool; | |
384 | retv = 0; | |
385 | break; | |
386 | ||
333fad53 YH |
387 | case IPV6_HOPOPTS: |
388 | case IPV6_RTHDRDSTOPTS: | |
389 | case IPV6_RTHDR: | |
390 | case IPV6_DSTOPTS: | |
391 | { | |
392 | struct ipv6_txoptions *opt; | |
aea7427f SW |
393 | |
394 | /* remove any sticky options header with a zero option | |
395 | * length, per RFC3542. | |
396 | */ | |
333fad53 | 397 | if (optlen == 0) |
cb422c46 | 398 | optval = NULL; |
63159f29 | 399 | else if (!optval) |
cfb266c0 | 400 | goto e_inval; |
aea7427f SW |
401 | else if (optlen < sizeof(struct ipv6_opt_hdr) || |
402 | optlen & 0x7 || optlen > 8 * 255) | |
403 | goto e_inval; | |
333fad53 YH |
404 | |
405 | /* hop-by-hop / destination options are privileged option */ | |
406 | retv = -EPERM; | |
af31f412 | 407 | if (optname != IPV6_RTHDR && !ns_capable(net->user_ns, CAP_NET_RAW)) |
333fad53 YH |
408 | break; |
409 | ||
1e1d04e6 HFS |
410 | opt = rcu_dereference_protected(np->opt, |
411 | lockdep_sock_is_held(sk)); | |
45f6fad8 | 412 | opt = ipv6_renew_options(sk, opt, optname, |
333fad53 YH |
413 | (struct ipv6_opt_hdr __user *)optval, |
414 | optlen); | |
415 | if (IS_ERR(opt)) { | |
416 | retv = PTR_ERR(opt); | |
417 | break; | |
418 | } | |
419 | ||
420 | /* routing header option needs extra check */ | |
6e093d9d | 421 | retv = -EINVAL; |
dfee0a72 | 422 | if (optname == IPV6_RTHDR && opt && opt->srcrt) { |
333fad53 | 423 | struct ipv6_rt_hdr *rthdr = opt->srcrt; |
280a9d34 | 424 | switch (rthdr->type) { |
07a93626 | 425 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
280a9d34 | 426 | case IPV6_SRCRT_TYPE_2: |
6e093d9d BH |
427 | if (rthdr->hdrlen != 2 || |
428 | rthdr->segments_left != 1) | |
429 | goto sticky_done; | |
430 | ||
280a9d34 | 431 | break; |
bb4dbf9e | 432 | #endif |
280a9d34 | 433 | default: |
333fad53 | 434 | goto sticky_done; |
280a9d34 | 435 | } |
333fad53 YH |
436 | } |
437 | ||
438 | retv = 0; | |
e7712f1a | 439 | opt = ipv6_update_options(sk, opt); |
333fad53 | 440 | sticky_done: |
45f6fad8 ED |
441 | if (opt) { |
442 | atomic_sub(opt->tot_len, &sk->sk_omem_alloc); | |
443 | txopt_put(opt); | |
444 | } | |
333fad53 YH |
445 | break; |
446 | } | |
447 | ||
b24a2516 YH |
448 | case IPV6_PKTINFO: |
449 | { | |
450 | struct in6_pktinfo pkt; | |
451 | ||
452 | if (optlen == 0) | |
453 | goto e_inval; | |
63159f29 | 454 | else if (optlen < sizeof(struct in6_pktinfo) || !optval) |
b24a2516 YH |
455 | goto e_inval; |
456 | ||
914d1164 | 457 | if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) { |
b24a2516 YH |
458 | retv = -EFAULT; |
459 | break; | |
460 | } | |
461 | if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if) | |
462 | goto e_inval; | |
463 | ||
464 | np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex; | |
4e3fd7a0 | 465 | np->sticky_pktinfo.ipi6_addr = pkt.ipi6_addr; |
b24a2516 YH |
466 | retv = 0; |
467 | break; | |
468 | } | |
469 | ||
333fad53 | 470 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
471 | { |
472 | struct ipv6_txoptions *opt = NULL; | |
473 | struct msghdr msg; | |
4c9483b2 | 474 | struct flowi6 fl6; |
ad1e46a8 | 475 | struct sockcm_cookie sockc_junk; |
26879da5 | 476 | struct ipcm6_cookie ipc6; |
1da177e4 | 477 | |
4c9483b2 DM |
478 | memset(&fl6, 0, sizeof(fl6)); |
479 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
480 | fl6.flowi6_mark = sk->sk_mark; | |
1da177e4 LT |
481 | |
482 | if (optlen == 0) | |
483 | goto update; | |
484 | ||
485 | /* 1K is probably excessive | |
486 | * 1K is surely not enough, 2K per standard header is 16K. | |
487 | */ | |
488 | retv = -EINVAL; | |
489 | if (optlen > 64*1024) | |
490 | break; | |
491 | ||
492 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
493 | retv = -ENOBUFS; | |
63159f29 | 494 | if (!opt) |
1da177e4 LT |
495 | break; |
496 | ||
497 | memset(opt, 0, sizeof(*opt)); | |
45f6fad8 | 498 | atomic_set(&opt->refcnt, 1); |
1da177e4 LT |
499 | opt->tot_len = sizeof(*opt) + optlen; |
500 | retv = -EFAULT; | |
501 | if (copy_from_user(opt+1, optval, optlen)) | |
502 | goto done; | |
503 | ||
504 | msg.msg_controllen = optlen; | |
67ba4152 | 505 | msg.msg_control = (void *)(opt+1); |
26879da5 | 506 | ipc6.opt = opt; |
1da177e4 | 507 | |
26879da5 | 508 | retv = ip6_datagram_send_ctl(net, sk, &msg, &fl6, &ipc6, &sockc_junk); |
1da177e4 LT |
509 | if (retv) |
510 | goto done; | |
511 | update: | |
512 | retv = 0; | |
e7712f1a | 513 | opt = ipv6_update_options(sk, opt); |
1da177e4 | 514 | done: |
45f6fad8 ED |
515 | if (opt) { |
516 | atomic_sub(opt->tot_len, &sk->sk_omem_alloc); | |
517 | txopt_put(opt); | |
518 | } | |
1da177e4 LT |
519 | break; |
520 | } | |
521 | case IPV6_UNICAST_HOPS: | |
b2a9d7c2 YH |
522 | if (optlen < sizeof(int)) |
523 | goto e_inval; | |
1da177e4 LT |
524 | if (val > 255 || val < -1) |
525 | goto e_inval; | |
526 | np->hop_limit = val; | |
527 | retv = 0; | |
528 | break; | |
529 | ||
530 | case IPV6_MULTICAST_HOPS: | |
531 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 532 | break; |
b2a9d7c2 YH |
533 | if (optlen < sizeof(int)) |
534 | goto e_inval; | |
1da177e4 LT |
535 | if (val > 255 || val < -1) |
536 | goto e_inval; | |
2a38e6d5 | 537 | np->mcast_hops = (val == -1 ? IPV6_DEFAULT_MCASTHOPS : val); |
1da177e4 LT |
538 | retv = 0; |
539 | break; | |
540 | ||
541 | case IPV6_MULTICAST_LOOP: | |
b2a9d7c2 YH |
542 | if (optlen < sizeof(int)) |
543 | goto e_inval; | |
28d44882 YH |
544 | if (val != valbool) |
545 | goto e_inval; | |
1da177e4 LT |
546 | np->mc_loop = valbool; |
547 | retv = 0; | |
548 | break; | |
549 | ||
c4062dfc EH |
550 | case IPV6_UNICAST_IF: |
551 | { | |
552 | struct net_device *dev = NULL; | |
553 | int ifindex; | |
554 | ||
555 | if (optlen != sizeof(int)) | |
556 | goto e_inval; | |
557 | ||
558 | ifindex = (__force int)ntohl((__force __be32)val); | |
559 | if (ifindex == 0) { | |
560 | np->ucast_oif = 0; | |
561 | retv = 0; | |
562 | break; | |
563 | } | |
564 | ||
565 | dev = dev_get_by_index(net, ifindex); | |
566 | retv = -EADDRNOTAVAIL; | |
567 | if (!dev) | |
568 | break; | |
569 | dev_put(dev); | |
570 | ||
571 | retv = -EINVAL; | |
572 | if (sk->sk_bound_dev_if) | |
573 | break; | |
574 | ||
575 | np->ucast_oif = ifindex; | |
576 | retv = 0; | |
577 | break; | |
578 | } | |
579 | ||
1da177e4 LT |
580 | case IPV6_MULTICAST_IF: |
581 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 582 | break; |
b2a9d7c2 YH |
583 | if (optlen < sizeof(int)) |
584 | goto e_inval; | |
1da177e4 | 585 | |
4953f0fc | 586 | if (val) { |
55b80503 ED |
587 | struct net_device *dev; |
588 | ||
4953f0fc BH |
589 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) |
590 | goto e_inval; | |
591 | ||
55b80503 ED |
592 | dev = dev_get_by_index(net, val); |
593 | if (!dev) { | |
4953f0fc BH |
594 | retv = -ENODEV; |
595 | break; | |
596 | } | |
55b80503 | 597 | dev_put(dev); |
1da177e4 LT |
598 | } |
599 | np->mcast_oif = val; | |
600 | retv = 0; | |
601 | break; | |
602 | case IPV6_ADD_MEMBERSHIP: | |
603 | case IPV6_DROP_MEMBERSHIP: | |
604 | { | |
605 | struct ipv6_mreq mreq; | |
606 | ||
a28398ba WC |
607 | if (optlen < sizeof(struct ipv6_mreq)) |
608 | goto e_inval; | |
609 | ||
a96fb49b FL |
610 | retv = -EPROTO; |
611 | if (inet_sk(sk)->is_icsk) | |
612 | break; | |
613 | ||
1da177e4 LT |
614 | retv = -EFAULT; |
615 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
616 | break; | |
617 | ||
618 | if (optname == IPV6_ADD_MEMBERSHIP) | |
54ff9ef3 | 619 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); |
1da177e4 | 620 | else |
54ff9ef3 | 621 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); |
1da177e4 LT |
622 | break; |
623 | } | |
624 | case IPV6_JOIN_ANYCAST: | |
625 | case IPV6_LEAVE_ANYCAST: | |
626 | { | |
627 | struct ipv6_mreq mreq; | |
628 | ||
a28398ba | 629 | if (optlen < sizeof(struct ipv6_mreq)) |
1da177e4 LT |
630 | goto e_inval; |
631 | ||
632 | retv = -EFAULT; | |
633 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
634 | break; | |
635 | ||
636 | if (optname == IPV6_JOIN_ANYCAST) | |
637 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
638 | else | |
639 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
640 | break; | |
641 | } | |
642 | case MCAST_JOIN_GROUP: | |
643 | case MCAST_LEAVE_GROUP: | |
644 | { | |
645 | struct group_req greq; | |
646 | struct sockaddr_in6 *psin6; | |
647 | ||
a28398ba WC |
648 | if (optlen < sizeof(struct group_req)) |
649 | goto e_inval; | |
650 | ||
1da177e4 LT |
651 | retv = -EFAULT; |
652 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
653 | break; | |
654 | if (greq.gr_group.ss_family != AF_INET6) { | |
655 | retv = -EADDRNOTAVAIL; | |
656 | break; | |
657 | } | |
658 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
659 | if (optname == MCAST_JOIN_GROUP) | |
54ff9ef3 MRL |
660 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, |
661 | &psin6->sin6_addr); | |
1da177e4 | 662 | else |
54ff9ef3 MRL |
663 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, |
664 | &psin6->sin6_addr); | |
1da177e4 LT |
665 | break; |
666 | } | |
667 | case MCAST_JOIN_SOURCE_GROUP: | |
668 | case MCAST_LEAVE_SOURCE_GROUP: | |
669 | case MCAST_BLOCK_SOURCE: | |
670 | case MCAST_UNBLOCK_SOURCE: | |
671 | { | |
672 | struct group_source_req greqs; | |
673 | int omode, add; | |
674 | ||
a28398ba | 675 | if (optlen < sizeof(struct group_source_req)) |
1da177e4 LT |
676 | goto e_inval; |
677 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
678 | retv = -EFAULT; | |
679 | break; | |
680 | } | |
681 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
682 | greqs.gsr_source.ss_family != AF_INET6) { | |
683 | retv = -EADDRNOTAVAIL; | |
684 | break; | |
685 | } | |
686 | if (optname == MCAST_BLOCK_SOURCE) { | |
687 | omode = MCAST_EXCLUDE; | |
688 | add = 1; | |
689 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
690 | omode = MCAST_EXCLUDE; | |
691 | add = 0; | |
692 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
693 | struct sockaddr_in6 *psin6; | |
694 | ||
695 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
54ff9ef3 MRL |
696 | retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, |
697 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
698 | /* prior join w/ different source is ok */ |
699 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
700 | break; |
701 | omode = MCAST_INCLUDE; | |
702 | add = 1; | |
c9e3e8b6 | 703 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
704 | omode = MCAST_INCLUDE; |
705 | add = 0; | |
706 | } | |
707 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
708 | break; | |
709 | } | |
710 | case MCAST_MSFILTER: | |
711 | { | |
1da177e4 LT |
712 | struct group_filter *gsf; |
713 | ||
714 | if (optlen < GROUP_FILTER_SIZE(0)) | |
715 | goto e_inval; | |
716 | if (optlen > sysctl_optmem_max) { | |
717 | retv = -ENOBUFS; | |
718 | break; | |
719 | } | |
67ba4152 | 720 | gsf = kmalloc(optlen, GFP_KERNEL); |
cfcabdcc | 721 | if (!gsf) { |
1da177e4 LT |
722 | retv = -ENOBUFS; |
723 | break; | |
724 | } | |
725 | retv = -EFAULT; | |
726 | if (copy_from_user(gsf, optval, optlen)) { | |
727 | kfree(gsf); | |
728 | break; | |
729 | } | |
730 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
731 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
732 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
733 | kfree(gsf); | |
734 | retv = -ENOBUFS; | |
735 | break; | |
736 | } | |
737 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
738 | kfree(gsf); | |
739 | retv = -EINVAL; | |
740 | break; | |
741 | } | |
742 | retv = ip6_mc_msfilter(sk, gsf); | |
743 | kfree(gsf); | |
744 | ||
745 | break; | |
746 | } | |
747 | case IPV6_ROUTER_ALERT: | |
b2a9d7c2 YH |
748 | if (optlen < sizeof(int)) |
749 | goto e_inval; | |
725a8ff0 | 750 | retv = ip6_ra_control(sk, val); |
1da177e4 LT |
751 | break; |
752 | case IPV6_MTU_DISCOVER: | |
b2a9d7c2 YH |
753 | if (optlen < sizeof(int)) |
754 | goto e_inval; | |
0b95227a | 755 | if (val < IPV6_PMTUDISC_DONT || val > IPV6_PMTUDISC_OMIT) |
1da177e4 LT |
756 | goto e_inval; |
757 | np->pmtudisc = val; | |
758 | retv = 0; | |
759 | break; | |
760 | case IPV6_MTU: | |
b2a9d7c2 YH |
761 | if (optlen < sizeof(int)) |
762 | goto e_inval; | |
1da177e4 LT |
763 | if (val && val < IPV6_MIN_MTU) |
764 | goto e_inval; | |
765 | np->frag_size = val; | |
766 | retv = 0; | |
767 | break; | |
768 | case IPV6_RECVERR: | |
b2a9d7c2 YH |
769 | if (optlen < sizeof(int)) |
770 | goto e_inval; | |
1da177e4 LT |
771 | np->recverr = valbool; |
772 | if (!val) | |
773 | skb_queue_purge(&sk->sk_error_queue); | |
774 | retv = 0; | |
775 | break; | |
776 | case IPV6_FLOWINFO_SEND: | |
b2a9d7c2 YH |
777 | if (optlen < sizeof(int)) |
778 | goto e_inval; | |
1da177e4 LT |
779 | np->sndflow = valbool; |
780 | retv = 0; | |
781 | break; | |
782 | case IPV6_FLOWLABEL_MGR: | |
783 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
784 | break; | |
785 | case IPV6_IPSEC_POLICY: | |
786 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 | 787 | retv = -EPERM; |
af31f412 | 788 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
6fc0b4a7 | 789 | break; |
1da177e4 LT |
790 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
791 | break; | |
792 | ||
7cbca67c YH |
793 | case IPV6_ADDR_PREFERENCES: |
794 | { | |
795 | unsigned int pref = 0; | |
796 | unsigned int prefmask = ~0; | |
797 | ||
b2a9d7c2 YH |
798 | if (optlen < sizeof(int)) |
799 | goto e_inval; | |
800 | ||
7cbca67c YH |
801 | retv = -EINVAL; |
802 | ||
803 | /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ | |
804 | switch (val & (IPV6_PREFER_SRC_PUBLIC| | |
805 | IPV6_PREFER_SRC_TMP| | |
806 | IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { | |
807 | case IPV6_PREFER_SRC_PUBLIC: | |
808 | pref |= IPV6_PREFER_SRC_PUBLIC; | |
809 | break; | |
810 | case IPV6_PREFER_SRC_TMP: | |
811 | pref |= IPV6_PREFER_SRC_TMP; | |
812 | break; | |
813 | case IPV6_PREFER_SRC_PUBTMP_DEFAULT: | |
814 | break; | |
815 | case 0: | |
816 | goto pref_skip_pubtmp; | |
817 | default: | |
818 | goto e_inval; | |
819 | } | |
820 | ||
821 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| | |
822 | IPV6_PREFER_SRC_TMP); | |
823 | pref_skip_pubtmp: | |
824 | ||
825 | /* check HOME/COA conflicts */ | |
826 | switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { | |
827 | case IPV6_PREFER_SRC_HOME: | |
828 | break; | |
829 | case IPV6_PREFER_SRC_COA: | |
830 | pref |= IPV6_PREFER_SRC_COA; | |
831 | case 0: | |
832 | goto pref_skip_coa; | |
833 | default: | |
834 | goto e_inval; | |
835 | } | |
836 | ||
837 | prefmask &= ~IPV6_PREFER_SRC_COA; | |
838 | pref_skip_coa: | |
839 | ||
840 | /* check CGA/NONCGA conflicts */ | |
841 | switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { | |
842 | case IPV6_PREFER_SRC_CGA: | |
843 | case IPV6_PREFER_SRC_NONCGA: | |
844 | case 0: | |
845 | break; | |
846 | default: | |
847 | goto e_inval; | |
848 | } | |
849 | ||
850 | np->srcprefs = (np->srcprefs & prefmask) | pref; | |
851 | retv = 0; | |
852 | ||
853 | break; | |
854 | } | |
e802af9c SH |
855 | case IPV6_MINHOPCOUNT: |
856 | if (optlen < sizeof(int)) | |
857 | goto e_inval; | |
858 | if (val < 0 || val > 255) | |
859 | goto e_inval; | |
860 | np->min_hopcount = val; | |
d4596bad | 861 | retv = 0; |
793b1473 BH |
862 | break; |
863 | case IPV6_DONTFRAG: | |
864 | np->dontfrag = valbool; | |
e802af9c SH |
865 | retv = 0; |
866 | break; | |
cb1ce2ef TH |
867 | case IPV6_AUTOFLOWLABEL: |
868 | np->autoflowlabel = valbool; | |
869 | retv = 0; | |
870 | break; | |
1da177e4 | 871 | } |
7cbca67c | 872 | |
1da177e4 | 873 | release_sock(sk); |
baf606d9 MRL |
874 | if (needs_rtnl) |
875 | rtnl_unlock(); | |
1da177e4 | 876 | |
1da177e4 LT |
877 | return retv; |
878 | ||
879 | e_inval: | |
880 | release_sock(sk); | |
baf606d9 MRL |
881 | if (needs_rtnl) |
882 | rtnl_unlock(); | |
1da177e4 LT |
883 | return -EINVAL; |
884 | } | |
885 | ||
3fdadf7d | 886 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 887 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
888 | { |
889 | int err; | |
890 | ||
891 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
892 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
893 | ||
894 | if (level != SOL_IPV6) | |
895 | return -ENOPROTOOPT; | |
896 | ||
897 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
898 | #ifdef CONFIG_NETFILTER | |
899 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
900 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
901 | optname != IPV6_XFRM_POLICY) { | |
902 | lock_sock(sk); | |
903 | err = nf_setsockopt(sk, PF_INET6, optname, optval, | |
904 | optlen); | |
905 | release_sock(sk); | |
906 | } | |
907 | #endif | |
908 | return err; | |
909 | } | |
7159039a | 910 | EXPORT_SYMBOL(ipv6_setsockopt); |
3fdadf7d DM |
911 | |
912 | #ifdef CONFIG_COMPAT | |
913 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
b7058842 | 914 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
915 | { |
916 | int err; | |
917 | ||
918 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
919 | if (udp_prot.compat_setsockopt != NULL) |
920 | return udp_prot.compat_setsockopt(sk, level, optname, | |
921 | optval, optlen); | |
922 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
923 | } |
924 | ||
925 | if (level != SOL_IPV6) | |
926 | return -ENOPROTOOPT; | |
927 | ||
dae50295 DS |
928 | if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) |
929 | return compat_mc_setsockopt(sk, level, optname, optval, optlen, | |
930 | ipv6_setsockopt); | |
931 | ||
3fdadf7d DM |
932 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); |
933 | #ifdef CONFIG_NETFILTER | |
934 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
935 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
543d9cfe | 936 | optname != IPV6_XFRM_POLICY) { |
3fdadf7d | 937 | lock_sock(sk); |
543d9cfe ACM |
938 | err = compat_nf_setsockopt(sk, PF_INET6, optname, |
939 | optval, optlen); | |
3fdadf7d DM |
940 | release_sock(sk); |
941 | } | |
942 | #endif | |
943 | return err; | |
944 | } | |
543d9cfe | 945 | EXPORT_SYMBOL(compat_ipv6_setsockopt); |
3fdadf7d DM |
946 | #endif |
947 | ||
28693079 | 948 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, |
4c6510a7 | 949 | int optname, char __user *optval, int len) |
333fad53 | 950 | { |
28693079 DM |
951 | struct ipv6_opt_hdr *hdr; |
952 | ||
4c6510a7 YH |
953 | if (!opt) |
954 | return 0; | |
955 | ||
67ba4152 | 956 | switch (optname) { |
4c6510a7 YH |
957 | case IPV6_HOPOPTS: |
958 | hdr = opt->hopopt; | |
959 | break; | |
960 | case IPV6_RTHDRDSTOPTS: | |
961 | hdr = opt->dst0opt; | |
962 | break; | |
963 | case IPV6_RTHDR: | |
964 | hdr = (struct ipv6_opt_hdr *)opt->srcrt; | |
965 | break; | |
966 | case IPV6_DSTOPTS: | |
967 | hdr = opt->dst1opt; | |
968 | break; | |
969 | default: | |
970 | return -EINVAL; /* should not happen */ | |
971 | } | |
972 | ||
973 | if (!hdr) | |
333fad53 | 974 | return 0; |
28693079 | 975 | |
d2b02ed9 | 976 | len = min_t(unsigned int, len, ipv6_optlen(hdr)); |
660adc6e | 977 | if (copy_to_user(optval, hdr, len)) |
333fad53 | 978 | return -EFAULT; |
95b496b6 | 979 | return len; |
333fad53 YH |
980 | } |
981 | ||
3fdadf7d | 982 | static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
95c96174 | 983 | char __user *optval, int __user *optlen, unsigned int flags) |
1da177e4 LT |
984 | { |
985 | struct ipv6_pinfo *np = inet6_sk(sk); | |
986 | int len; | |
987 | int val; | |
988 | ||
7bc570c8 YH |
989 | if (ip6_mroute_opt(optname)) |
990 | return ip6_mroute_getsockopt(sk, optname, optval, optlen); | |
991 | ||
1da177e4 LT |
992 | if (get_user(len, optlen)) |
993 | return -EFAULT; | |
994 | switch (optname) { | |
995 | case IPV6_ADDRFORM: | |
996 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 997 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 | 998 | sk->sk_protocol != IPPROTO_TCP) |
1717699c | 999 | return -ENOPROTOOPT; |
1da177e4 LT |
1000 | if (sk->sk_state != TCP_ESTABLISHED) |
1001 | return -ENOTCONN; | |
1002 | val = sk->sk_family; | |
1003 | break; | |
1004 | case MCAST_MSFILTER: | |
1005 | { | |
1006 | struct group_filter gsf; | |
1007 | int err; | |
1008 | ||
1009 | if (len < GROUP_FILTER_SIZE(0)) | |
1010 | return -EINVAL; | |
1011 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
1012 | return -EFAULT; | |
20c61fbd YH |
1013 | if (gsf.gf_group.ss_family != AF_INET6) |
1014 | return -EADDRNOTAVAIL; | |
1da177e4 LT |
1015 | lock_sock(sk); |
1016 | err = ip6_mc_msfget(sk, &gsf, | |
1017 | (struct group_filter __user *)optval, optlen); | |
1018 | release_sock(sk); | |
1019 | return err; | |
1020 | } | |
1021 | ||
333fad53 | 1022 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
1023 | { |
1024 | struct msghdr msg; | |
1025 | struct sk_buff *skb; | |
1026 | ||
1027 | if (sk->sk_type != SOCK_STREAM) | |
1028 | return -ENOPROTOOPT; | |
1029 | ||
1030 | msg.msg_control = optval; | |
1031 | msg.msg_controllen = len; | |
98e77438 | 1032 | msg.msg_flags = flags; |
1da177e4 LT |
1033 | |
1034 | lock_sock(sk); | |
1035 | skb = np->pktoptions; | |
1036 | if (skb) | |
4b261c75 | 1037 | ip6_datagram_recv_ctl(sk, &msg, skb); |
1dc7b90f ED |
1038 | release_sock(sk); |
1039 | if (!skb) { | |
1da177e4 LT |
1040 | if (np->rxopt.bits.rxinfo) { |
1041 | struct in6_pktinfo src_info; | |
f250dcda YH |
1042 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
1043 | np->sticky_pktinfo.ipi6_ifindex; | |
efe4208f | 1044 | src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : np->sticky_pktinfo.ipi6_addr; |
1da177e4 LT |
1045 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); |
1046 | } | |
1047 | if (np->rxopt.bits.rxhlim) { | |
1048 | int hlim = np->mcast_hops; | |
1049 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
1050 | } | |
4c507d28 | 1051 | if (np->rxopt.bits.rxtclass) { |
d76ed22b LR |
1052 | int tclass = (int)ip6_tclass(np->rcv_flowinfo); |
1053 | ||
4c507d28 JB |
1054 | put_cmsg(&msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass); |
1055 | } | |
333fad53 YH |
1056 | if (np->rxopt.bits.rxoinfo) { |
1057 | struct in6_pktinfo src_info; | |
f250dcda YH |
1058 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
1059 | np->sticky_pktinfo.ipi6_ifindex; | |
efe4208f ED |
1060 | src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : |
1061 | np->sticky_pktinfo.ipi6_addr; | |
333fad53 YH |
1062 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); |
1063 | } | |
1064 | if (np->rxopt.bits.rxohlim) { | |
1065 | int hlim = np->mcast_hops; | |
1066 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
1067 | } | |
1397ed35 | 1068 | if (np->rxopt.bits.rxflow) { |
68536053 FF |
1069 | __be32 flowinfo = np->rcv_flowinfo; |
1070 | ||
1397ed35 FF |
1071 | put_cmsg(&msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo); |
1072 | } | |
1da177e4 LT |
1073 | } |
1074 | len -= msg.msg_controllen; | |
1075 | return put_user(len, optlen); | |
1076 | } | |
1077 | case IPV6_MTU: | |
1078 | { | |
1079 | struct dst_entry *dst; | |
b6c6712a | 1080 | |
1ab1457c | 1081 | val = 0; |
b6c6712a ED |
1082 | rcu_read_lock(); |
1083 | dst = __sk_dst_get(sk); | |
1084 | if (dst) | |
1da177e4 | 1085 | val = dst_mtu(dst); |
b6c6712a | 1086 | rcu_read_unlock(); |
1da177e4 LT |
1087 | if (!val) |
1088 | return -ENOTCONN; | |
1089 | break; | |
1090 | } | |
1091 | ||
1092 | case IPV6_V6ONLY: | |
9fe516ba | 1093 | val = sk->sk_ipv6only; |
1da177e4 LT |
1094 | break; |
1095 | ||
333fad53 | 1096 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
1097 | val = np->rxopt.bits.rxinfo; |
1098 | break; | |
1099 | ||
333fad53 YH |
1100 | case IPV6_2292PKTINFO: |
1101 | val = np->rxopt.bits.rxoinfo; | |
1102 | break; | |
1103 | ||
1104 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
1105 | val = np->rxopt.bits.rxhlim; |
1106 | break; | |
1107 | ||
333fad53 YH |
1108 | case IPV6_2292HOPLIMIT: |
1109 | val = np->rxopt.bits.rxohlim; | |
1110 | break; | |
1111 | ||
1112 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
1113 | val = np->rxopt.bits.srcrt; |
1114 | break; | |
1115 | ||
333fad53 YH |
1116 | case IPV6_2292RTHDR: |
1117 | val = np->rxopt.bits.osrcrt; | |
1118 | break; | |
1119 | ||
1da177e4 | 1120 | case IPV6_HOPOPTS: |
333fad53 YH |
1121 | case IPV6_RTHDRDSTOPTS: |
1122 | case IPV6_RTHDR: | |
1123 | case IPV6_DSTOPTS: | |
1124 | { | |
45f6fad8 | 1125 | struct ipv6_txoptions *opt; |
333fad53 YH |
1126 | |
1127 | lock_sock(sk); | |
1e1d04e6 HFS |
1128 | opt = rcu_dereference_protected(np->opt, |
1129 | lockdep_sock_is_held(sk)); | |
45f6fad8 | 1130 | len = ipv6_getsockopt_sticky(sk, opt, optname, optval, len); |
333fad53 | 1131 | release_sock(sk); |
05335c22 YH |
1132 | /* check if ipv6_getsockopt_sticky() returns err code */ |
1133 | if (len < 0) | |
1134 | return len; | |
333fad53 YH |
1135 | return put_user(len, optlen); |
1136 | } | |
1137 | ||
1138 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
1139 | val = np->rxopt.bits.hopopts; |
1140 | break; | |
1141 | ||
333fad53 YH |
1142 | case IPV6_2292HOPOPTS: |
1143 | val = np->rxopt.bits.ohopopts; | |
1144 | break; | |
1145 | ||
1146 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
1147 | val = np->rxopt.bits.dstopts; |
1148 | break; | |
1149 | ||
333fad53 YH |
1150 | case IPV6_2292DSTOPTS: |
1151 | val = np->rxopt.bits.odstopts; | |
1152 | break; | |
1153 | ||
41a1f8ea YH |
1154 | case IPV6_TCLASS: |
1155 | val = np->tclass; | |
1156 | break; | |
1157 | ||
1158 | case IPV6_RECVTCLASS: | |
1159 | val = np->rxopt.bits.rxtclass; | |
1160 | break; | |
1161 | ||
1da177e4 LT |
1162 | case IPV6_FLOWINFO: |
1163 | val = np->rxopt.bits.rxflow; | |
1164 | break; | |
1165 | ||
793b1473 BH |
1166 | case IPV6_RECVPATHMTU: |
1167 | val = np->rxopt.bits.rxpmtu; | |
1168 | break; | |
1169 | ||
1170 | case IPV6_PATHMTU: | |
1171 | { | |
1172 | struct dst_entry *dst; | |
1173 | struct ip6_mtuinfo mtuinfo; | |
1174 | ||
1175 | if (len < sizeof(mtuinfo)) | |
1176 | return -EINVAL; | |
1177 | ||
1178 | len = sizeof(mtuinfo); | |
1179 | memset(&mtuinfo, 0, sizeof(mtuinfo)); | |
1180 | ||
1181 | rcu_read_lock(); | |
1182 | dst = __sk_dst_get(sk); | |
1183 | if (dst) | |
1184 | mtuinfo.ip6m_mtu = dst_mtu(dst); | |
1185 | rcu_read_unlock(); | |
1186 | if (!mtuinfo.ip6m_mtu) | |
1187 | return -ENOTCONN; | |
1188 | ||
1189 | if (put_user(len, optlen)) | |
1190 | return -EFAULT; | |
1191 | if (copy_to_user(optval, &mtuinfo, len)) | |
1192 | return -EFAULT; | |
1193 | ||
1194 | return 0; | |
793b1473 BH |
1195 | } |
1196 | ||
6c468622 BS |
1197 | case IPV6_TRANSPARENT: |
1198 | val = inet_sk(sk)->transparent; | |
1199 | break; | |
1200 | ||
1201 | case IPV6_RECVORIGDSTADDR: | |
1202 | val = np->rxopt.bits.rxorigdstaddr; | |
1203 | break; | |
1204 | ||
1da177e4 | 1205 | case IPV6_UNICAST_HOPS: |
1da177e4 | 1206 | case IPV6_MULTICAST_HOPS: |
befffe90 BH |
1207 | { |
1208 | struct dst_entry *dst; | |
1209 | ||
1210 | if (optname == IPV6_UNICAST_HOPS) | |
1211 | val = np->hop_limit; | |
1212 | else | |
1213 | val = np->mcast_hops; | |
1214 | ||
b6c6712a ED |
1215 | if (val < 0) { |
1216 | rcu_read_lock(); | |
1217 | dst = __sk_dst_get(sk); | |
1218 | if (dst) | |
6b75d090 | 1219 | val = ip6_dst_hoplimit(dst); |
b6c6712a | 1220 | rcu_read_unlock(); |
befffe90 | 1221 | } |
b6c6712a | 1222 | |
befffe90 | 1223 | if (val < 0) |
53b7997f | 1224 | val = sock_net(sk)->ipv6.devconf_all->hop_limit; |
1da177e4 | 1225 | break; |
befffe90 | 1226 | } |
1da177e4 LT |
1227 | |
1228 | case IPV6_MULTICAST_LOOP: | |
1229 | val = np->mc_loop; | |
1230 | break; | |
1231 | ||
1232 | case IPV6_MULTICAST_IF: | |
1233 | val = np->mcast_oif; | |
1234 | break; | |
1235 | ||
c4062dfc EH |
1236 | case IPV6_UNICAST_IF: |
1237 | val = (__force int)htonl((__u32) np->ucast_oif); | |
1238 | break; | |
1239 | ||
1da177e4 LT |
1240 | case IPV6_MTU_DISCOVER: |
1241 | val = np->pmtudisc; | |
1242 | break; | |
1243 | ||
1244 | case IPV6_RECVERR: | |
1245 | val = np->recverr; | |
1246 | break; | |
1247 | ||
1248 | case IPV6_FLOWINFO_SEND: | |
1249 | val = np->sndflow; | |
1250 | break; | |
1251 | ||
3fdfa5ff FF |
1252 | case IPV6_FLOWLABEL_MGR: |
1253 | { | |
1254 | struct in6_flowlabel_req freq; | |
46e5f401 | 1255 | int flags; |
3fdfa5ff FF |
1256 | |
1257 | if (len < sizeof(freq)) | |
1258 | return -EINVAL; | |
1259 | ||
1260 | if (copy_from_user(&freq, optval, sizeof(freq))) | |
1261 | return -EFAULT; | |
1262 | ||
1263 | if (freq.flr_action != IPV6_FL_A_GET) | |
1264 | return -EINVAL; | |
1265 | ||
1266 | len = sizeof(freq); | |
46e5f401 FF |
1267 | flags = freq.flr_flags; |
1268 | ||
3fdfa5ff FF |
1269 | memset(&freq, 0, sizeof(freq)); |
1270 | ||
46e5f401 | 1271 | val = ipv6_flowlabel_opt_get(sk, &freq, flags); |
3fdfa5ff FF |
1272 | if (val < 0) |
1273 | return val; | |
1274 | ||
1275 | if (put_user(len, optlen)) | |
1276 | return -EFAULT; | |
1277 | if (copy_to_user(optval, &freq, len)) | |
1278 | return -EFAULT; | |
1279 | ||
1280 | return 0; | |
1281 | } | |
1282 | ||
7cbca67c YH |
1283 | case IPV6_ADDR_PREFERENCES: |
1284 | val = 0; | |
1285 | ||
1286 | if (np->srcprefs & IPV6_PREFER_SRC_TMP) | |
1287 | val |= IPV6_PREFER_SRC_TMP; | |
1288 | else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) | |
1289 | val |= IPV6_PREFER_SRC_PUBLIC; | |
1290 | else { | |
1291 | /* XXX: should we return system default? */ | |
1292 | val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; | |
1293 | } | |
1294 | ||
1295 | if (np->srcprefs & IPV6_PREFER_SRC_COA) | |
1296 | val |= IPV6_PREFER_SRC_COA; | |
1297 | else | |
1298 | val |= IPV6_PREFER_SRC_HOME; | |
1299 | break; | |
e802af9c SH |
1300 | |
1301 | case IPV6_MINHOPCOUNT: | |
1302 | val = np->min_hopcount; | |
1303 | break; | |
793b1473 BH |
1304 | |
1305 | case IPV6_DONTFRAG: | |
1306 | val = np->dontfrag; | |
1307 | break; | |
7cbca67c | 1308 | |
cb1ce2ef TH |
1309 | case IPV6_AUTOFLOWLABEL: |
1310 | val = np->autoflowlabel; | |
1311 | break; | |
1312 | ||
1da177e4 | 1313 | default: |
cf6fc4a9 | 1314 | return -ENOPROTOOPT; |
1da177e4 LT |
1315 | } |
1316 | len = min_t(unsigned int, sizeof(int), len); | |
67ba4152 | 1317 | if (put_user(len, optlen)) |
1da177e4 | 1318 | return -EFAULT; |
67ba4152 | 1319 | if (copy_to_user(optval, &val, len)) |
1da177e4 LT |
1320 | return -EFAULT; |
1321 | return 0; | |
1322 | } | |
1323 | ||
3fdadf7d DM |
1324 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1325 | char __user *optval, int __user *optlen) | |
1326 | { | |
1327 | int err; | |
1328 | ||
1329 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
1330 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
1331 | ||
67ba4152 | 1332 | if (level != SOL_IPV6) |
3fdadf7d DM |
1333 | return -ENOPROTOOPT; |
1334 | ||
98e77438 | 1335 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 0); |
3fdadf7d | 1336 | #ifdef CONFIG_NETFILTER |
cf6fc4a9 WY |
1337 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1338 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1339 | int len; |
1340 | ||
1341 | if (get_user(len, optlen)) | |
1342 | return -EFAULT; | |
1343 | ||
1344 | lock_sock(sk); | |
1345 | err = nf_getsockopt(sk, PF_INET6, optname, optval, | |
1346 | &len); | |
1347 | release_sock(sk); | |
1348 | if (err >= 0) | |
1349 | err = put_user(len, optlen); | |
1350 | } | |
1351 | #endif | |
1352 | return err; | |
1353 | } | |
7159039a YH |
1354 | EXPORT_SYMBOL(ipv6_getsockopt); |
1355 | ||
3fdadf7d DM |
1356 | #ifdef CONFIG_COMPAT |
1357 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1358 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
1359 | { |
1360 | int err; | |
1361 | ||
1362 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
1363 | if (udp_prot.compat_getsockopt != NULL) |
1364 | return udp_prot.compat_getsockopt(sk, level, optname, | |
1365 | optval, optlen); | |
1366 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
1367 | } |
1368 | ||
543d9cfe | 1369 | if (level != SOL_IPV6) |
3fdadf7d DM |
1370 | return -ENOPROTOOPT; |
1371 | ||
80991790 PE |
1372 | if (optname == MCAST_MSFILTER) |
1373 | return compat_mc_getsockopt(sk, level, optname, optval, optlen, | |
1374 | ipv6_getsockopt); | |
1375 | ||
98e77438 DB |
1376 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, |
1377 | MSG_CMSG_COMPAT); | |
3fdadf7d | 1378 | #ifdef CONFIG_NETFILTER |
cf6fc4a9 WY |
1379 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1380 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1381 | int len; |
1382 | ||
1383 | if (get_user(len, optlen)) | |
1384 | return -EFAULT; | |
1385 | ||
1386 | lock_sock(sk); | |
543d9cfe ACM |
1387 | err = compat_nf_getsockopt(sk, PF_INET6, |
1388 | optname, optval, &len); | |
3fdadf7d DM |
1389 | release_sock(sk); |
1390 | if (err >= 0) | |
1391 | err = put_user(len, optlen); | |
1392 | } | |
1393 | #endif | |
1394 | return err; | |
1395 | } | |
543d9cfe | 1396 | EXPORT_SYMBOL(compat_ipv6_getsockopt); |
3fdadf7d DM |
1397 | #endif |
1398 |