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 | } |
86fe8f89 | 114 | opt = xchg(&inet6_sk(sk)->opt, 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 | } | |
234 | opt = xchg(&np->opt, NULL); | |
235 | if (opt) | |
236 | sock_kfree_s(sk, opt, opt->tot_len); | |
237 | pktopt = xchg(&np->pktoptions, NULL); | |
800d55f1 | 238 | kfree_skb(pktopt); |
1da177e4 LT |
239 | |
240 | sk->sk_destruct = inet_sock_destruct; | |
e6848976 ACM |
241 | /* |
242 | * ... and add it to the refcnt debug socks count | |
243 | * in the new family. -acme | |
244 | */ | |
245 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
246 | module_put(THIS_MODULE); |
247 | retv = 0; | |
248 | break; | |
249 | } | |
250 | goto e_inval; | |
251 | ||
252 | case IPV6_V6ONLY: | |
b2a9d7c2 | 253 | if (optlen < sizeof(int) || |
c720c7e8 | 254 | inet_sk(sk)->inet_num) |
1da177e4 | 255 | goto e_inval; |
9fe516ba | 256 | sk->sk_ipv6only = valbool; |
1da177e4 LT |
257 | retv = 0; |
258 | break; | |
259 | ||
333fad53 | 260 | case IPV6_RECVPKTINFO: |
b2a9d7c2 YH |
261 | if (optlen < sizeof(int)) |
262 | goto e_inval; | |
1da177e4 LT |
263 | np->rxopt.bits.rxinfo = valbool; |
264 | retv = 0; | |
265 | break; | |
1ab1457c | 266 | |
333fad53 | 267 | case IPV6_2292PKTINFO: |
b2a9d7c2 YH |
268 | if (optlen < sizeof(int)) |
269 | goto e_inval; | |
333fad53 YH |
270 | np->rxopt.bits.rxoinfo = valbool; |
271 | retv = 0; | |
272 | break; | |
1da177e4 | 273 | |
333fad53 | 274 | case IPV6_RECVHOPLIMIT: |
b2a9d7c2 YH |
275 | if (optlen < sizeof(int)) |
276 | goto e_inval; | |
1da177e4 LT |
277 | np->rxopt.bits.rxhlim = valbool; |
278 | retv = 0; | |
279 | break; | |
280 | ||
333fad53 | 281 | case IPV6_2292HOPLIMIT: |
b2a9d7c2 YH |
282 | if (optlen < sizeof(int)) |
283 | goto e_inval; | |
333fad53 YH |
284 | np->rxopt.bits.rxohlim = valbool; |
285 | retv = 0; | |
286 | break; | |
287 | ||
288 | case IPV6_RECVRTHDR: | |
b2a9d7c2 YH |
289 | if (optlen < sizeof(int)) |
290 | goto e_inval; | |
4c752098 | 291 | np->rxopt.bits.srcrt = valbool; |
1da177e4 LT |
292 | retv = 0; |
293 | break; | |
294 | ||
333fad53 | 295 | case IPV6_2292RTHDR: |
b2a9d7c2 YH |
296 | if (optlen < sizeof(int)) |
297 | goto e_inval; | |
4c752098 | 298 | np->rxopt.bits.osrcrt = valbool; |
333fad53 YH |
299 | retv = 0; |
300 | break; | |
301 | ||
302 | case IPV6_RECVHOPOPTS: | |
b2a9d7c2 YH |
303 | if (optlen < sizeof(int)) |
304 | goto e_inval; | |
1da177e4 LT |
305 | np->rxopt.bits.hopopts = valbool; |
306 | retv = 0; | |
307 | break; | |
308 | ||
333fad53 | 309 | case IPV6_2292HOPOPTS: |
b2a9d7c2 YH |
310 | if (optlen < sizeof(int)) |
311 | goto e_inval; | |
333fad53 YH |
312 | np->rxopt.bits.ohopopts = valbool; |
313 | retv = 0; | |
314 | break; | |
315 | ||
316 | case IPV6_RECVDSTOPTS: | |
b2a9d7c2 YH |
317 | if (optlen < sizeof(int)) |
318 | goto e_inval; | |
1da177e4 LT |
319 | np->rxopt.bits.dstopts = valbool; |
320 | retv = 0; | |
321 | break; | |
322 | ||
333fad53 | 323 | case IPV6_2292DSTOPTS: |
b2a9d7c2 YH |
324 | if (optlen < sizeof(int)) |
325 | goto e_inval; | |
333fad53 YH |
326 | np->rxopt.bits.odstopts = valbool; |
327 | retv = 0; | |
328 | break; | |
329 | ||
41a1f8ea | 330 | case IPV6_TCLASS: |
b2a9d7c2 YH |
331 | if (optlen < sizeof(int)) |
332 | goto e_inval; | |
d0ee011f | 333 | if (val < -1 || val > 0xff) |
41a1f8ea | 334 | goto e_inval; |
26ced1e4 GR |
335 | /* RFC 3542, 6.5: default traffic class of 0x0 */ |
336 | if (val == -1) | |
337 | val = 0; | |
41a1f8ea YH |
338 | np->tclass = val; |
339 | retv = 0; | |
340 | break; | |
1ab1457c | 341 | |
41a1f8ea | 342 | case IPV6_RECVTCLASS: |
b2a9d7c2 YH |
343 | if (optlen < sizeof(int)) |
344 | goto e_inval; | |
41a1f8ea YH |
345 | np->rxopt.bits.rxtclass = valbool; |
346 | retv = 0; | |
347 | break; | |
348 | ||
1da177e4 | 349 | case IPV6_FLOWINFO: |
b2a9d7c2 YH |
350 | if (optlen < sizeof(int)) |
351 | goto e_inval; | |
1da177e4 LT |
352 | np->rxopt.bits.rxflow = valbool; |
353 | retv = 0; | |
354 | break; | |
355 | ||
793b1473 BH |
356 | case IPV6_RECVPATHMTU: |
357 | if (optlen < sizeof(int)) | |
358 | goto e_inval; | |
359 | np->rxopt.bits.rxpmtu = valbool; | |
360 | retv = 0; | |
361 | break; | |
362 | ||
6c468622 | 363 | case IPV6_TRANSPARENT: |
af31f412 EB |
364 | if (valbool && !ns_capable(net->user_ns, CAP_NET_ADMIN) && |
365 | !ns_capable(net->user_ns, CAP_NET_RAW)) { | |
b889416b BS |
366 | retv = -EPERM; |
367 | break; | |
368 | } | |
6c468622 BS |
369 | if (optlen < sizeof(int)) |
370 | goto e_inval; | |
371 | /* we don't have a separate transparent bit for IPV6 we use the one in the IPv4 socket */ | |
372 | inet_sk(sk)->transparent = valbool; | |
373 | retv = 0; | |
374 | break; | |
375 | ||
376 | case IPV6_RECVORIGDSTADDR: | |
377 | if (optlen < sizeof(int)) | |
378 | goto e_inval; | |
379 | np->rxopt.bits.rxorigdstaddr = valbool; | |
380 | retv = 0; | |
381 | break; | |
382 | ||
333fad53 YH |
383 | case IPV6_HOPOPTS: |
384 | case IPV6_RTHDRDSTOPTS: | |
385 | case IPV6_RTHDR: | |
386 | case IPV6_DSTOPTS: | |
387 | { | |
388 | struct ipv6_txoptions *opt; | |
aea7427f SW |
389 | |
390 | /* remove any sticky options header with a zero option | |
391 | * length, per RFC3542. | |
392 | */ | |
333fad53 | 393 | if (optlen == 0) |
cb422c46 | 394 | optval = NULL; |
63159f29 | 395 | else if (!optval) |
cfb266c0 | 396 | goto e_inval; |
aea7427f SW |
397 | else if (optlen < sizeof(struct ipv6_opt_hdr) || |
398 | optlen & 0x7 || optlen > 8 * 255) | |
399 | goto e_inval; | |
333fad53 YH |
400 | |
401 | /* hop-by-hop / destination options are privileged option */ | |
402 | retv = -EPERM; | |
af31f412 | 403 | if (optname != IPV6_RTHDR && !ns_capable(net->user_ns, CAP_NET_RAW)) |
333fad53 YH |
404 | break; |
405 | ||
333fad53 YH |
406 | opt = ipv6_renew_options(sk, np->opt, optname, |
407 | (struct ipv6_opt_hdr __user *)optval, | |
408 | optlen); | |
409 | if (IS_ERR(opt)) { | |
410 | retv = PTR_ERR(opt); | |
411 | break; | |
412 | } | |
413 | ||
414 | /* routing header option needs extra check */ | |
6e093d9d | 415 | retv = -EINVAL; |
dfee0a72 | 416 | if (optname == IPV6_RTHDR && opt && opt->srcrt) { |
333fad53 | 417 | struct ipv6_rt_hdr *rthdr = opt->srcrt; |
280a9d34 | 418 | switch (rthdr->type) { |
07a93626 | 419 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
280a9d34 | 420 | case IPV6_SRCRT_TYPE_2: |
6e093d9d BH |
421 | if (rthdr->hdrlen != 2 || |
422 | rthdr->segments_left != 1) | |
423 | goto sticky_done; | |
424 | ||
280a9d34 | 425 | break; |
bb4dbf9e | 426 | #endif |
280a9d34 | 427 | default: |
333fad53 | 428 | goto sticky_done; |
280a9d34 | 429 | } |
333fad53 YH |
430 | } |
431 | ||
432 | retv = 0; | |
e7712f1a | 433 | opt = ipv6_update_options(sk, opt); |
333fad53 YH |
434 | sticky_done: |
435 | if (opt) | |
436 | sock_kfree_s(sk, opt, opt->tot_len); | |
437 | break; | |
438 | } | |
439 | ||
b24a2516 YH |
440 | case IPV6_PKTINFO: |
441 | { | |
442 | struct in6_pktinfo pkt; | |
443 | ||
444 | if (optlen == 0) | |
445 | goto e_inval; | |
63159f29 | 446 | else if (optlen < sizeof(struct in6_pktinfo) || !optval) |
b24a2516 YH |
447 | goto e_inval; |
448 | ||
914d1164 | 449 | if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) { |
b24a2516 YH |
450 | retv = -EFAULT; |
451 | break; | |
452 | } | |
453 | if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if) | |
454 | goto e_inval; | |
455 | ||
456 | np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex; | |
4e3fd7a0 | 457 | np->sticky_pktinfo.ipi6_addr = pkt.ipi6_addr; |
b24a2516 YH |
458 | retv = 0; |
459 | break; | |
460 | } | |
461 | ||
333fad53 | 462 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
463 | { |
464 | struct ipv6_txoptions *opt = NULL; | |
465 | struct msghdr msg; | |
4c9483b2 | 466 | struct flowi6 fl6; |
1da177e4 LT |
467 | int junk; |
468 | ||
4c9483b2 DM |
469 | memset(&fl6, 0, sizeof(fl6)); |
470 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
471 | fl6.flowi6_mark = sk->sk_mark; | |
1da177e4 LT |
472 | |
473 | if (optlen == 0) | |
474 | goto update; | |
475 | ||
476 | /* 1K is probably excessive | |
477 | * 1K is surely not enough, 2K per standard header is 16K. | |
478 | */ | |
479 | retv = -EINVAL; | |
480 | if (optlen > 64*1024) | |
481 | break; | |
482 | ||
483 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
484 | retv = -ENOBUFS; | |
63159f29 | 485 | if (!opt) |
1da177e4 LT |
486 | break; |
487 | ||
488 | memset(opt, 0, sizeof(*opt)); | |
489 | opt->tot_len = sizeof(*opt) + optlen; | |
490 | retv = -EFAULT; | |
491 | if (copy_from_user(opt+1, optval, optlen)) | |
492 | goto done; | |
493 | ||
494 | msg.msg_controllen = optlen; | |
67ba4152 | 495 | msg.msg_control = (void *)(opt+1); |
1da177e4 | 496 | |
73df66f8 TP |
497 | retv = ip6_datagram_send_ctl(net, sk, &msg, &fl6, opt, &junk, |
498 | &junk, &junk); | |
1da177e4 LT |
499 | if (retv) |
500 | goto done; | |
501 | update: | |
502 | retv = 0; | |
e7712f1a | 503 | opt = ipv6_update_options(sk, opt); |
1da177e4 LT |
504 | done: |
505 | if (opt) | |
506 | sock_kfree_s(sk, opt, opt->tot_len); | |
507 | break; | |
508 | } | |
509 | case IPV6_UNICAST_HOPS: | |
b2a9d7c2 YH |
510 | if (optlen < sizeof(int)) |
511 | goto e_inval; | |
1da177e4 LT |
512 | if (val > 255 || val < -1) |
513 | goto e_inval; | |
514 | np->hop_limit = val; | |
515 | retv = 0; | |
516 | break; | |
517 | ||
518 | case IPV6_MULTICAST_HOPS: | |
519 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 520 | break; |
b2a9d7c2 YH |
521 | if (optlen < sizeof(int)) |
522 | goto e_inval; | |
1da177e4 LT |
523 | if (val > 255 || val < -1) |
524 | goto e_inval; | |
2a38e6d5 | 525 | np->mcast_hops = (val == -1 ? IPV6_DEFAULT_MCASTHOPS : val); |
1da177e4 LT |
526 | retv = 0; |
527 | break; | |
528 | ||
529 | case IPV6_MULTICAST_LOOP: | |
b2a9d7c2 YH |
530 | if (optlen < sizeof(int)) |
531 | goto e_inval; | |
28d44882 YH |
532 | if (val != valbool) |
533 | goto e_inval; | |
1da177e4 LT |
534 | np->mc_loop = valbool; |
535 | retv = 0; | |
536 | break; | |
537 | ||
c4062dfc EH |
538 | case IPV6_UNICAST_IF: |
539 | { | |
540 | struct net_device *dev = NULL; | |
541 | int ifindex; | |
542 | ||
543 | if (optlen != sizeof(int)) | |
544 | goto e_inval; | |
545 | ||
546 | ifindex = (__force int)ntohl((__force __be32)val); | |
547 | if (ifindex == 0) { | |
548 | np->ucast_oif = 0; | |
549 | retv = 0; | |
550 | break; | |
551 | } | |
552 | ||
553 | dev = dev_get_by_index(net, ifindex); | |
554 | retv = -EADDRNOTAVAIL; | |
555 | if (!dev) | |
556 | break; | |
557 | dev_put(dev); | |
558 | ||
559 | retv = -EINVAL; | |
560 | if (sk->sk_bound_dev_if) | |
561 | break; | |
562 | ||
563 | np->ucast_oif = ifindex; | |
564 | retv = 0; | |
565 | break; | |
566 | } | |
567 | ||
1da177e4 LT |
568 | case IPV6_MULTICAST_IF: |
569 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 570 | break; |
b2a9d7c2 YH |
571 | if (optlen < sizeof(int)) |
572 | goto e_inval; | |
1da177e4 | 573 | |
4953f0fc | 574 | if (val) { |
55b80503 ED |
575 | struct net_device *dev; |
576 | ||
4953f0fc BH |
577 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) |
578 | goto e_inval; | |
579 | ||
55b80503 ED |
580 | dev = dev_get_by_index(net, val); |
581 | if (!dev) { | |
4953f0fc BH |
582 | retv = -ENODEV; |
583 | break; | |
584 | } | |
55b80503 | 585 | dev_put(dev); |
1da177e4 LT |
586 | } |
587 | np->mcast_oif = val; | |
588 | retv = 0; | |
589 | break; | |
590 | case IPV6_ADD_MEMBERSHIP: | |
591 | case IPV6_DROP_MEMBERSHIP: | |
592 | { | |
593 | struct ipv6_mreq mreq; | |
594 | ||
a28398ba WC |
595 | if (optlen < sizeof(struct ipv6_mreq)) |
596 | goto e_inval; | |
597 | ||
a96fb49b FL |
598 | retv = -EPROTO; |
599 | if (inet_sk(sk)->is_icsk) | |
600 | break; | |
601 | ||
1da177e4 LT |
602 | retv = -EFAULT; |
603 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
604 | break; | |
605 | ||
606 | if (optname == IPV6_ADD_MEMBERSHIP) | |
54ff9ef3 | 607 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); |
1da177e4 | 608 | else |
54ff9ef3 | 609 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); |
1da177e4 LT |
610 | break; |
611 | } | |
612 | case IPV6_JOIN_ANYCAST: | |
613 | case IPV6_LEAVE_ANYCAST: | |
614 | { | |
615 | struct ipv6_mreq mreq; | |
616 | ||
a28398ba | 617 | if (optlen < sizeof(struct ipv6_mreq)) |
1da177e4 LT |
618 | goto e_inval; |
619 | ||
620 | retv = -EFAULT; | |
621 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
622 | break; | |
623 | ||
624 | if (optname == IPV6_JOIN_ANYCAST) | |
625 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
626 | else | |
627 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
628 | break; | |
629 | } | |
630 | case MCAST_JOIN_GROUP: | |
631 | case MCAST_LEAVE_GROUP: | |
632 | { | |
633 | struct group_req greq; | |
634 | struct sockaddr_in6 *psin6; | |
635 | ||
a28398ba WC |
636 | if (optlen < sizeof(struct group_req)) |
637 | goto e_inval; | |
638 | ||
1da177e4 LT |
639 | retv = -EFAULT; |
640 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
641 | break; | |
642 | if (greq.gr_group.ss_family != AF_INET6) { | |
643 | retv = -EADDRNOTAVAIL; | |
644 | break; | |
645 | } | |
646 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
647 | if (optname == MCAST_JOIN_GROUP) | |
54ff9ef3 MRL |
648 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, |
649 | &psin6->sin6_addr); | |
1da177e4 | 650 | else |
54ff9ef3 MRL |
651 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, |
652 | &psin6->sin6_addr); | |
1da177e4 LT |
653 | break; |
654 | } | |
655 | case MCAST_JOIN_SOURCE_GROUP: | |
656 | case MCAST_LEAVE_SOURCE_GROUP: | |
657 | case MCAST_BLOCK_SOURCE: | |
658 | case MCAST_UNBLOCK_SOURCE: | |
659 | { | |
660 | struct group_source_req greqs; | |
661 | int omode, add; | |
662 | ||
a28398ba | 663 | if (optlen < sizeof(struct group_source_req)) |
1da177e4 LT |
664 | goto e_inval; |
665 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
666 | retv = -EFAULT; | |
667 | break; | |
668 | } | |
669 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
670 | greqs.gsr_source.ss_family != AF_INET6) { | |
671 | retv = -EADDRNOTAVAIL; | |
672 | break; | |
673 | } | |
674 | if (optname == MCAST_BLOCK_SOURCE) { | |
675 | omode = MCAST_EXCLUDE; | |
676 | add = 1; | |
677 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
678 | omode = MCAST_EXCLUDE; | |
679 | add = 0; | |
680 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
681 | struct sockaddr_in6 *psin6; | |
682 | ||
683 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
54ff9ef3 MRL |
684 | retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, |
685 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
686 | /* prior join w/ different source is ok */ |
687 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
688 | break; |
689 | omode = MCAST_INCLUDE; | |
690 | add = 1; | |
c9e3e8b6 | 691 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
692 | omode = MCAST_INCLUDE; |
693 | add = 0; | |
694 | } | |
695 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
696 | break; | |
697 | } | |
698 | case MCAST_MSFILTER: | |
699 | { | |
1da177e4 LT |
700 | struct group_filter *gsf; |
701 | ||
702 | if (optlen < GROUP_FILTER_SIZE(0)) | |
703 | goto e_inval; | |
704 | if (optlen > sysctl_optmem_max) { | |
705 | retv = -ENOBUFS; | |
706 | break; | |
707 | } | |
67ba4152 | 708 | gsf = kmalloc(optlen, GFP_KERNEL); |
cfcabdcc | 709 | if (!gsf) { |
1da177e4 LT |
710 | retv = -ENOBUFS; |
711 | break; | |
712 | } | |
713 | retv = -EFAULT; | |
714 | if (copy_from_user(gsf, optval, optlen)) { | |
715 | kfree(gsf); | |
716 | break; | |
717 | } | |
718 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
719 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
720 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
721 | kfree(gsf); | |
722 | retv = -ENOBUFS; | |
723 | break; | |
724 | } | |
725 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
726 | kfree(gsf); | |
727 | retv = -EINVAL; | |
728 | break; | |
729 | } | |
730 | retv = ip6_mc_msfilter(sk, gsf); | |
731 | kfree(gsf); | |
732 | ||
733 | break; | |
734 | } | |
735 | case IPV6_ROUTER_ALERT: | |
b2a9d7c2 YH |
736 | if (optlen < sizeof(int)) |
737 | goto e_inval; | |
725a8ff0 | 738 | retv = ip6_ra_control(sk, val); |
1da177e4 LT |
739 | break; |
740 | case IPV6_MTU_DISCOVER: | |
b2a9d7c2 YH |
741 | if (optlen < sizeof(int)) |
742 | goto e_inval; | |
0b95227a | 743 | if (val < IPV6_PMTUDISC_DONT || val > IPV6_PMTUDISC_OMIT) |
1da177e4 LT |
744 | goto e_inval; |
745 | np->pmtudisc = val; | |
746 | retv = 0; | |
747 | break; | |
748 | case IPV6_MTU: | |
b2a9d7c2 YH |
749 | if (optlen < sizeof(int)) |
750 | goto e_inval; | |
1da177e4 LT |
751 | if (val && val < IPV6_MIN_MTU) |
752 | goto e_inval; | |
753 | np->frag_size = val; | |
754 | retv = 0; | |
755 | break; | |
756 | case IPV6_RECVERR: | |
b2a9d7c2 YH |
757 | if (optlen < sizeof(int)) |
758 | goto e_inval; | |
1da177e4 LT |
759 | np->recverr = valbool; |
760 | if (!val) | |
761 | skb_queue_purge(&sk->sk_error_queue); | |
762 | retv = 0; | |
763 | break; | |
764 | case IPV6_FLOWINFO_SEND: | |
b2a9d7c2 YH |
765 | if (optlen < sizeof(int)) |
766 | goto e_inval; | |
1da177e4 LT |
767 | np->sndflow = valbool; |
768 | retv = 0; | |
769 | break; | |
770 | case IPV6_FLOWLABEL_MGR: | |
771 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
772 | break; | |
773 | case IPV6_IPSEC_POLICY: | |
774 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 | 775 | retv = -EPERM; |
af31f412 | 776 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
6fc0b4a7 | 777 | break; |
1da177e4 LT |
778 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
779 | break; | |
780 | ||
7cbca67c YH |
781 | case IPV6_ADDR_PREFERENCES: |
782 | { | |
783 | unsigned int pref = 0; | |
784 | unsigned int prefmask = ~0; | |
785 | ||
b2a9d7c2 YH |
786 | if (optlen < sizeof(int)) |
787 | goto e_inval; | |
788 | ||
7cbca67c YH |
789 | retv = -EINVAL; |
790 | ||
791 | /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ | |
792 | switch (val & (IPV6_PREFER_SRC_PUBLIC| | |
793 | IPV6_PREFER_SRC_TMP| | |
794 | IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { | |
795 | case IPV6_PREFER_SRC_PUBLIC: | |
796 | pref |= IPV6_PREFER_SRC_PUBLIC; | |
797 | break; | |
798 | case IPV6_PREFER_SRC_TMP: | |
799 | pref |= IPV6_PREFER_SRC_TMP; | |
800 | break; | |
801 | case IPV6_PREFER_SRC_PUBTMP_DEFAULT: | |
802 | break; | |
803 | case 0: | |
804 | goto pref_skip_pubtmp; | |
805 | default: | |
806 | goto e_inval; | |
807 | } | |
808 | ||
809 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| | |
810 | IPV6_PREFER_SRC_TMP); | |
811 | pref_skip_pubtmp: | |
812 | ||
813 | /* check HOME/COA conflicts */ | |
814 | switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { | |
815 | case IPV6_PREFER_SRC_HOME: | |
816 | break; | |
817 | case IPV6_PREFER_SRC_COA: | |
818 | pref |= IPV6_PREFER_SRC_COA; | |
819 | case 0: | |
820 | goto pref_skip_coa; | |
821 | default: | |
822 | goto e_inval; | |
823 | } | |
824 | ||
825 | prefmask &= ~IPV6_PREFER_SRC_COA; | |
826 | pref_skip_coa: | |
827 | ||
828 | /* check CGA/NONCGA conflicts */ | |
829 | switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { | |
830 | case IPV6_PREFER_SRC_CGA: | |
831 | case IPV6_PREFER_SRC_NONCGA: | |
832 | case 0: | |
833 | break; | |
834 | default: | |
835 | goto e_inval; | |
836 | } | |
837 | ||
838 | np->srcprefs = (np->srcprefs & prefmask) | pref; | |
839 | retv = 0; | |
840 | ||
841 | break; | |
842 | } | |
e802af9c SH |
843 | case IPV6_MINHOPCOUNT: |
844 | if (optlen < sizeof(int)) | |
845 | goto e_inval; | |
846 | if (val < 0 || val > 255) | |
847 | goto e_inval; | |
848 | np->min_hopcount = val; | |
d4596bad | 849 | retv = 0; |
793b1473 BH |
850 | break; |
851 | case IPV6_DONTFRAG: | |
852 | np->dontfrag = valbool; | |
e802af9c SH |
853 | retv = 0; |
854 | break; | |
cb1ce2ef TH |
855 | case IPV6_AUTOFLOWLABEL: |
856 | np->autoflowlabel = valbool; | |
857 | retv = 0; | |
858 | break; | |
1da177e4 | 859 | } |
7cbca67c | 860 | |
1da177e4 | 861 | release_sock(sk); |
baf606d9 MRL |
862 | if (needs_rtnl) |
863 | rtnl_unlock(); | |
1da177e4 | 864 | |
1da177e4 LT |
865 | return retv; |
866 | ||
867 | e_inval: | |
868 | release_sock(sk); | |
baf606d9 MRL |
869 | if (needs_rtnl) |
870 | rtnl_unlock(); | |
1da177e4 LT |
871 | return -EINVAL; |
872 | } | |
873 | ||
3fdadf7d | 874 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 875 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
876 | { |
877 | int err; | |
878 | ||
879 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
880 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
881 | ||
882 | if (level != SOL_IPV6) | |
883 | return -ENOPROTOOPT; | |
884 | ||
885 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
886 | #ifdef CONFIG_NETFILTER | |
887 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
888 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
889 | optname != IPV6_XFRM_POLICY) { | |
890 | lock_sock(sk); | |
891 | err = nf_setsockopt(sk, PF_INET6, optname, optval, | |
892 | optlen); | |
893 | release_sock(sk); | |
894 | } | |
895 | #endif | |
896 | return err; | |
897 | } | |
7159039a | 898 | EXPORT_SYMBOL(ipv6_setsockopt); |
3fdadf7d DM |
899 | |
900 | #ifdef CONFIG_COMPAT | |
901 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
b7058842 | 902 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
903 | { |
904 | int err; | |
905 | ||
906 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
907 | if (udp_prot.compat_setsockopt != NULL) |
908 | return udp_prot.compat_setsockopt(sk, level, optname, | |
909 | optval, optlen); | |
910 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
911 | } |
912 | ||
913 | if (level != SOL_IPV6) | |
914 | return -ENOPROTOOPT; | |
915 | ||
dae50295 DS |
916 | if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) |
917 | return compat_mc_setsockopt(sk, level, optname, optval, optlen, | |
918 | ipv6_setsockopt); | |
919 | ||
3fdadf7d DM |
920 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); |
921 | #ifdef CONFIG_NETFILTER | |
922 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
923 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
543d9cfe | 924 | optname != IPV6_XFRM_POLICY) { |
3fdadf7d | 925 | lock_sock(sk); |
543d9cfe ACM |
926 | err = compat_nf_setsockopt(sk, PF_INET6, optname, |
927 | optval, optlen); | |
3fdadf7d DM |
928 | release_sock(sk); |
929 | } | |
930 | #endif | |
931 | return err; | |
932 | } | |
543d9cfe | 933 | EXPORT_SYMBOL(compat_ipv6_setsockopt); |
3fdadf7d DM |
934 | #endif |
935 | ||
28693079 | 936 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, |
4c6510a7 | 937 | int optname, char __user *optval, int len) |
333fad53 | 938 | { |
28693079 DM |
939 | struct ipv6_opt_hdr *hdr; |
940 | ||
4c6510a7 YH |
941 | if (!opt) |
942 | return 0; | |
943 | ||
67ba4152 | 944 | switch (optname) { |
4c6510a7 YH |
945 | case IPV6_HOPOPTS: |
946 | hdr = opt->hopopt; | |
947 | break; | |
948 | case IPV6_RTHDRDSTOPTS: | |
949 | hdr = opt->dst0opt; | |
950 | break; | |
951 | case IPV6_RTHDR: | |
952 | hdr = (struct ipv6_opt_hdr *)opt->srcrt; | |
953 | break; | |
954 | case IPV6_DSTOPTS: | |
955 | hdr = opt->dst1opt; | |
956 | break; | |
957 | default: | |
958 | return -EINVAL; /* should not happen */ | |
959 | } | |
960 | ||
961 | if (!hdr) | |
333fad53 | 962 | return 0; |
28693079 | 963 | |
d2b02ed9 | 964 | len = min_t(unsigned int, len, ipv6_optlen(hdr)); |
660adc6e | 965 | if (copy_to_user(optval, hdr, len)) |
333fad53 | 966 | return -EFAULT; |
95b496b6 | 967 | return len; |
333fad53 YH |
968 | } |
969 | ||
3fdadf7d | 970 | static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
95c96174 | 971 | char __user *optval, int __user *optlen, unsigned int flags) |
1da177e4 LT |
972 | { |
973 | struct ipv6_pinfo *np = inet6_sk(sk); | |
974 | int len; | |
975 | int val; | |
976 | ||
7bc570c8 YH |
977 | if (ip6_mroute_opt(optname)) |
978 | return ip6_mroute_getsockopt(sk, optname, optval, optlen); | |
979 | ||
1da177e4 LT |
980 | if (get_user(len, optlen)) |
981 | return -EFAULT; | |
982 | switch (optname) { | |
983 | case IPV6_ADDRFORM: | |
984 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 985 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 | 986 | sk->sk_protocol != IPPROTO_TCP) |
1717699c | 987 | return -ENOPROTOOPT; |
1da177e4 LT |
988 | if (sk->sk_state != TCP_ESTABLISHED) |
989 | return -ENOTCONN; | |
990 | val = sk->sk_family; | |
991 | break; | |
992 | case MCAST_MSFILTER: | |
993 | { | |
994 | struct group_filter gsf; | |
995 | int err; | |
996 | ||
997 | if (len < GROUP_FILTER_SIZE(0)) | |
998 | return -EINVAL; | |
999 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
1000 | return -EFAULT; | |
20c61fbd YH |
1001 | if (gsf.gf_group.ss_family != AF_INET6) |
1002 | return -EADDRNOTAVAIL; | |
1da177e4 LT |
1003 | lock_sock(sk); |
1004 | err = ip6_mc_msfget(sk, &gsf, | |
1005 | (struct group_filter __user *)optval, optlen); | |
1006 | release_sock(sk); | |
1007 | return err; | |
1008 | } | |
1009 | ||
333fad53 | 1010 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
1011 | { |
1012 | struct msghdr msg; | |
1013 | struct sk_buff *skb; | |
1014 | ||
1015 | if (sk->sk_type != SOCK_STREAM) | |
1016 | return -ENOPROTOOPT; | |
1017 | ||
1018 | msg.msg_control = optval; | |
1019 | msg.msg_controllen = len; | |
98e77438 | 1020 | msg.msg_flags = flags; |
1da177e4 LT |
1021 | |
1022 | lock_sock(sk); | |
1023 | skb = np->pktoptions; | |
1024 | if (skb) | |
4b261c75 | 1025 | ip6_datagram_recv_ctl(sk, &msg, skb); |
1dc7b90f ED |
1026 | release_sock(sk); |
1027 | if (!skb) { | |
1da177e4 LT |
1028 | if (np->rxopt.bits.rxinfo) { |
1029 | struct in6_pktinfo src_info; | |
f250dcda YH |
1030 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
1031 | np->sticky_pktinfo.ipi6_ifindex; | |
efe4208f | 1032 | src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : np->sticky_pktinfo.ipi6_addr; |
1da177e4 LT |
1033 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); |
1034 | } | |
1035 | if (np->rxopt.bits.rxhlim) { | |
1036 | int hlim = np->mcast_hops; | |
1037 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
1038 | } | |
4c507d28 | 1039 | if (np->rxopt.bits.rxtclass) { |
d76ed22b LR |
1040 | int tclass = (int)ip6_tclass(np->rcv_flowinfo); |
1041 | ||
4c507d28 JB |
1042 | put_cmsg(&msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass); |
1043 | } | |
333fad53 YH |
1044 | if (np->rxopt.bits.rxoinfo) { |
1045 | struct in6_pktinfo src_info; | |
f250dcda YH |
1046 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
1047 | np->sticky_pktinfo.ipi6_ifindex; | |
efe4208f ED |
1048 | src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : |
1049 | np->sticky_pktinfo.ipi6_addr; | |
333fad53 YH |
1050 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); |
1051 | } | |
1052 | if (np->rxopt.bits.rxohlim) { | |
1053 | int hlim = np->mcast_hops; | |
1054 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
1055 | } | |
1397ed35 | 1056 | if (np->rxopt.bits.rxflow) { |
68536053 FF |
1057 | __be32 flowinfo = np->rcv_flowinfo; |
1058 | ||
1397ed35 FF |
1059 | put_cmsg(&msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo); |
1060 | } | |
1da177e4 LT |
1061 | } |
1062 | len -= msg.msg_controllen; | |
1063 | return put_user(len, optlen); | |
1064 | } | |
1065 | case IPV6_MTU: | |
1066 | { | |
1067 | struct dst_entry *dst; | |
b6c6712a | 1068 | |
1ab1457c | 1069 | val = 0; |
b6c6712a ED |
1070 | rcu_read_lock(); |
1071 | dst = __sk_dst_get(sk); | |
1072 | if (dst) | |
1da177e4 | 1073 | val = dst_mtu(dst); |
b6c6712a | 1074 | rcu_read_unlock(); |
1da177e4 LT |
1075 | if (!val) |
1076 | return -ENOTCONN; | |
1077 | break; | |
1078 | } | |
1079 | ||
1080 | case IPV6_V6ONLY: | |
9fe516ba | 1081 | val = sk->sk_ipv6only; |
1da177e4 LT |
1082 | break; |
1083 | ||
333fad53 | 1084 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
1085 | val = np->rxopt.bits.rxinfo; |
1086 | break; | |
1087 | ||
333fad53 YH |
1088 | case IPV6_2292PKTINFO: |
1089 | val = np->rxopt.bits.rxoinfo; | |
1090 | break; | |
1091 | ||
1092 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
1093 | val = np->rxopt.bits.rxhlim; |
1094 | break; | |
1095 | ||
333fad53 YH |
1096 | case IPV6_2292HOPLIMIT: |
1097 | val = np->rxopt.bits.rxohlim; | |
1098 | break; | |
1099 | ||
1100 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
1101 | val = np->rxopt.bits.srcrt; |
1102 | break; | |
1103 | ||
333fad53 YH |
1104 | case IPV6_2292RTHDR: |
1105 | val = np->rxopt.bits.osrcrt; | |
1106 | break; | |
1107 | ||
1da177e4 | 1108 | case IPV6_HOPOPTS: |
333fad53 YH |
1109 | case IPV6_RTHDRDSTOPTS: |
1110 | case IPV6_RTHDR: | |
1111 | case IPV6_DSTOPTS: | |
1112 | { | |
1113 | ||
1114 | lock_sock(sk); | |
28693079 | 1115 | len = ipv6_getsockopt_sticky(sk, np->opt, |
4c6510a7 | 1116 | optname, optval, len); |
333fad53 | 1117 | release_sock(sk); |
05335c22 YH |
1118 | /* check if ipv6_getsockopt_sticky() returns err code */ |
1119 | if (len < 0) | |
1120 | return len; | |
333fad53 YH |
1121 | return put_user(len, optlen); |
1122 | } | |
1123 | ||
1124 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
1125 | val = np->rxopt.bits.hopopts; |
1126 | break; | |
1127 | ||
333fad53 YH |
1128 | case IPV6_2292HOPOPTS: |
1129 | val = np->rxopt.bits.ohopopts; | |
1130 | break; | |
1131 | ||
1132 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
1133 | val = np->rxopt.bits.dstopts; |
1134 | break; | |
1135 | ||
333fad53 YH |
1136 | case IPV6_2292DSTOPTS: |
1137 | val = np->rxopt.bits.odstopts; | |
1138 | break; | |
1139 | ||
41a1f8ea YH |
1140 | case IPV6_TCLASS: |
1141 | val = np->tclass; | |
1142 | break; | |
1143 | ||
1144 | case IPV6_RECVTCLASS: | |
1145 | val = np->rxopt.bits.rxtclass; | |
1146 | break; | |
1147 | ||
1da177e4 LT |
1148 | case IPV6_FLOWINFO: |
1149 | val = np->rxopt.bits.rxflow; | |
1150 | break; | |
1151 | ||
793b1473 BH |
1152 | case IPV6_RECVPATHMTU: |
1153 | val = np->rxopt.bits.rxpmtu; | |
1154 | break; | |
1155 | ||
1156 | case IPV6_PATHMTU: | |
1157 | { | |
1158 | struct dst_entry *dst; | |
1159 | struct ip6_mtuinfo mtuinfo; | |
1160 | ||
1161 | if (len < sizeof(mtuinfo)) | |
1162 | return -EINVAL; | |
1163 | ||
1164 | len = sizeof(mtuinfo); | |
1165 | memset(&mtuinfo, 0, sizeof(mtuinfo)); | |
1166 | ||
1167 | rcu_read_lock(); | |
1168 | dst = __sk_dst_get(sk); | |
1169 | if (dst) | |
1170 | mtuinfo.ip6m_mtu = dst_mtu(dst); | |
1171 | rcu_read_unlock(); | |
1172 | if (!mtuinfo.ip6m_mtu) | |
1173 | return -ENOTCONN; | |
1174 | ||
1175 | if (put_user(len, optlen)) | |
1176 | return -EFAULT; | |
1177 | if (copy_to_user(optval, &mtuinfo, len)) | |
1178 | return -EFAULT; | |
1179 | ||
1180 | return 0; | |
793b1473 BH |
1181 | } |
1182 | ||
6c468622 BS |
1183 | case IPV6_TRANSPARENT: |
1184 | val = inet_sk(sk)->transparent; | |
1185 | break; | |
1186 | ||
1187 | case IPV6_RECVORIGDSTADDR: | |
1188 | val = np->rxopt.bits.rxorigdstaddr; | |
1189 | break; | |
1190 | ||
1da177e4 | 1191 | case IPV6_UNICAST_HOPS: |
1da177e4 | 1192 | case IPV6_MULTICAST_HOPS: |
befffe90 BH |
1193 | { |
1194 | struct dst_entry *dst; | |
1195 | ||
1196 | if (optname == IPV6_UNICAST_HOPS) | |
1197 | val = np->hop_limit; | |
1198 | else | |
1199 | val = np->mcast_hops; | |
1200 | ||
b6c6712a ED |
1201 | if (val < 0) { |
1202 | rcu_read_lock(); | |
1203 | dst = __sk_dst_get(sk); | |
1204 | if (dst) | |
6b75d090 | 1205 | val = ip6_dst_hoplimit(dst); |
b6c6712a | 1206 | rcu_read_unlock(); |
befffe90 | 1207 | } |
b6c6712a | 1208 | |
befffe90 | 1209 | if (val < 0) |
53b7997f | 1210 | val = sock_net(sk)->ipv6.devconf_all->hop_limit; |
1da177e4 | 1211 | break; |
befffe90 | 1212 | } |
1da177e4 LT |
1213 | |
1214 | case IPV6_MULTICAST_LOOP: | |
1215 | val = np->mc_loop; | |
1216 | break; | |
1217 | ||
1218 | case IPV6_MULTICAST_IF: | |
1219 | val = np->mcast_oif; | |
1220 | break; | |
1221 | ||
c4062dfc EH |
1222 | case IPV6_UNICAST_IF: |
1223 | val = (__force int)htonl((__u32) np->ucast_oif); | |
1224 | break; | |
1225 | ||
1da177e4 LT |
1226 | case IPV6_MTU_DISCOVER: |
1227 | val = np->pmtudisc; | |
1228 | break; | |
1229 | ||
1230 | case IPV6_RECVERR: | |
1231 | val = np->recverr; | |
1232 | break; | |
1233 | ||
1234 | case IPV6_FLOWINFO_SEND: | |
1235 | val = np->sndflow; | |
1236 | break; | |
1237 | ||
3fdfa5ff FF |
1238 | case IPV6_FLOWLABEL_MGR: |
1239 | { | |
1240 | struct in6_flowlabel_req freq; | |
46e5f401 | 1241 | int flags; |
3fdfa5ff FF |
1242 | |
1243 | if (len < sizeof(freq)) | |
1244 | return -EINVAL; | |
1245 | ||
1246 | if (copy_from_user(&freq, optval, sizeof(freq))) | |
1247 | return -EFAULT; | |
1248 | ||
1249 | if (freq.flr_action != IPV6_FL_A_GET) | |
1250 | return -EINVAL; | |
1251 | ||
1252 | len = sizeof(freq); | |
46e5f401 FF |
1253 | flags = freq.flr_flags; |
1254 | ||
3fdfa5ff FF |
1255 | memset(&freq, 0, sizeof(freq)); |
1256 | ||
46e5f401 | 1257 | val = ipv6_flowlabel_opt_get(sk, &freq, flags); |
3fdfa5ff FF |
1258 | if (val < 0) |
1259 | return val; | |
1260 | ||
1261 | if (put_user(len, optlen)) | |
1262 | return -EFAULT; | |
1263 | if (copy_to_user(optval, &freq, len)) | |
1264 | return -EFAULT; | |
1265 | ||
1266 | return 0; | |
1267 | } | |
1268 | ||
7cbca67c YH |
1269 | case IPV6_ADDR_PREFERENCES: |
1270 | val = 0; | |
1271 | ||
1272 | if (np->srcprefs & IPV6_PREFER_SRC_TMP) | |
1273 | val |= IPV6_PREFER_SRC_TMP; | |
1274 | else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) | |
1275 | val |= IPV6_PREFER_SRC_PUBLIC; | |
1276 | else { | |
1277 | /* XXX: should we return system default? */ | |
1278 | val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; | |
1279 | } | |
1280 | ||
1281 | if (np->srcprefs & IPV6_PREFER_SRC_COA) | |
1282 | val |= IPV6_PREFER_SRC_COA; | |
1283 | else | |
1284 | val |= IPV6_PREFER_SRC_HOME; | |
1285 | break; | |
e802af9c SH |
1286 | |
1287 | case IPV6_MINHOPCOUNT: | |
1288 | val = np->min_hopcount; | |
1289 | break; | |
793b1473 BH |
1290 | |
1291 | case IPV6_DONTFRAG: | |
1292 | val = np->dontfrag; | |
1293 | break; | |
7cbca67c | 1294 | |
cb1ce2ef TH |
1295 | case IPV6_AUTOFLOWLABEL: |
1296 | val = np->autoflowlabel; | |
1297 | break; | |
1298 | ||
1da177e4 | 1299 | default: |
cf6fc4a9 | 1300 | return -ENOPROTOOPT; |
1da177e4 LT |
1301 | } |
1302 | len = min_t(unsigned int, sizeof(int), len); | |
67ba4152 | 1303 | if (put_user(len, optlen)) |
1da177e4 | 1304 | return -EFAULT; |
67ba4152 | 1305 | if (copy_to_user(optval, &val, len)) |
1da177e4 LT |
1306 | return -EFAULT; |
1307 | return 0; | |
1308 | } | |
1309 | ||
3fdadf7d DM |
1310 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1311 | char __user *optval, int __user *optlen) | |
1312 | { | |
1313 | int err; | |
1314 | ||
1315 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
1316 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
1317 | ||
67ba4152 | 1318 | if (level != SOL_IPV6) |
3fdadf7d DM |
1319 | return -ENOPROTOOPT; |
1320 | ||
98e77438 | 1321 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 0); |
3fdadf7d | 1322 | #ifdef CONFIG_NETFILTER |
cf6fc4a9 WY |
1323 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1324 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1325 | int len; |
1326 | ||
1327 | if (get_user(len, optlen)) | |
1328 | return -EFAULT; | |
1329 | ||
1330 | lock_sock(sk); | |
1331 | err = nf_getsockopt(sk, PF_INET6, optname, optval, | |
1332 | &len); | |
1333 | release_sock(sk); | |
1334 | if (err >= 0) | |
1335 | err = put_user(len, optlen); | |
1336 | } | |
1337 | #endif | |
1338 | return err; | |
1339 | } | |
7159039a YH |
1340 | EXPORT_SYMBOL(ipv6_getsockopt); |
1341 | ||
3fdadf7d DM |
1342 | #ifdef CONFIG_COMPAT |
1343 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1344 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
1345 | { |
1346 | int err; | |
1347 | ||
1348 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
1349 | if (udp_prot.compat_getsockopt != NULL) |
1350 | return udp_prot.compat_getsockopt(sk, level, optname, | |
1351 | optval, optlen); | |
1352 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
1353 | } |
1354 | ||
543d9cfe | 1355 | if (level != SOL_IPV6) |
3fdadf7d DM |
1356 | return -ENOPROTOOPT; |
1357 | ||
80991790 PE |
1358 | if (optname == MCAST_MSFILTER) |
1359 | return compat_mc_getsockopt(sk, level, optname, optval, optlen, | |
1360 | ipv6_getsockopt); | |
1361 | ||
98e77438 DB |
1362 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, |
1363 | MSG_CMSG_COMPAT); | |
3fdadf7d | 1364 | #ifdef CONFIG_NETFILTER |
cf6fc4a9 WY |
1365 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1366 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1367 | int len; |
1368 | ||
1369 | if (get_user(len, optlen)) | |
1370 | return -EFAULT; | |
1371 | ||
1372 | lock_sock(sk); | |
543d9cfe ACM |
1373 | err = compat_nf_getsockopt(sk, PF_INET6, |
1374 | optname, optval, &len); | |
3fdadf7d DM |
1375 | release_sock(sk); |
1376 | if (err >= 0) | |
1377 | err = put_user(len, optlen); | |
1378 | } | |
1379 | #endif | |
1380 | return err; | |
1381 | } | |
543d9cfe | 1382 | EXPORT_SYMBOL(compat_ipv6_getsockopt); |
3fdadf7d DM |
1383 | #endif |
1384 |