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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * IPv6 BSD socket options interface | |
1ab1457c | 3 | * Linux INET6 implementation |
1da177e4 LT |
4 | * |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * |
8 | * Based on linux/net/ipv4/ip_sockglue.c | |
9 | * | |
1da177e4 LT |
10 | * This program is free software; you can redistribute it and/or |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | * | |
15 | * FIXME: Make the setsockopt code POSIX compliant: That is | |
16 | * | |
1da177e4 LT |
17 | * o Truncate getsockopt returns |
18 | * o Return an optlen of the truncated length if need be | |
19 | * | |
20 | * Changes: | |
21 | * David L Stevens <dlstevens@us.ibm.com>: | |
22 | * - added multicast source filtering API for MLDv2 | |
23 | */ | |
24 | ||
25 | #include <linux/module.h> | |
4fc268d2 | 26 | #include <linux/capability.h> |
1da177e4 LT |
27 | #include <linux/errno.h> |
28 | #include <linux/types.h> | |
29 | #include <linux/socket.h> | |
30 | #include <linux/sockios.h> | |
1da177e4 LT |
31 | #include <linux/net.h> |
32 | #include <linux/in6.h> | |
7bc570c8 | 33 | #include <linux/mroute6.h> |
1da177e4 LT |
34 | #include <linux/netdevice.h> |
35 | #include <linux/if_arp.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/sysctl.h> | |
38 | #include <linux/netfilter.h> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
1da177e4 LT |
40 | |
41 | #include <net/sock.h> | |
42 | #include <net/snmp.h> | |
43 | #include <net/ipv6.h> | |
44 | #include <net/ndisc.h> | |
45 | #include <net/protocol.h> | |
46 | #include <net/transp_v6.h> | |
47 | #include <net/ip6_route.h> | |
48 | #include <net/addrconf.h> | |
49 | #include <net/inet_common.h> | |
50 | #include <net/tcp.h> | |
51 | #include <net/udp.h> | |
ba4e58ec | 52 | #include <net/udplite.h> |
1da177e4 | 53 | #include <net/xfrm.h> |
dae50295 | 54 | #include <net/compat.h> |
a149e7c7 | 55 | #include <net/seg6.h> |
1da177e4 | 56 | |
7c0f6ba6 | 57 | #include <linux/uaccess.h> |
1da177e4 | 58 | |
1da177e4 LT |
59 | struct ip6_ra_chain *ip6_ra_chain; |
60 | DEFINE_RWLOCK(ip6_ra_lock); | |
61 | ||
725a8ff0 | 62 | int ip6_ra_control(struct sock *sk, int sel) |
1da177e4 LT |
63 | { |
64 | struct ip6_ra_chain *ra, *new_ra, **rap; | |
65 | ||
66 | /* RA packet may be delivered ONLY to IPPROTO_RAW socket */ | |
c720c7e8 | 67 | if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num != IPPROTO_RAW) |
1717699c | 68 | return -ENOPROTOOPT; |
1da177e4 | 69 | |
67ba4152 | 70 | new_ra = (sel >= 0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; |
1da177e4 LT |
71 | |
72 | write_lock_bh(&ip6_ra_lock); | |
67ba4152 | 73 | for (rap = &ip6_ra_chain; (ra = *rap) != NULL; rap = &ra->next) { |
1da177e4 | 74 | if (ra->sk == sk) { |
67ba4152 | 75 | if (sel >= 0) { |
1da177e4 | 76 | write_unlock_bh(&ip6_ra_lock); |
a51482bd | 77 | kfree(new_ra); |
1da177e4 LT |
78 | return -EADDRINUSE; |
79 | } | |
80 | ||
81 | *rap = ra->next; | |
82 | write_unlock_bh(&ip6_ra_lock); | |
83 | ||
1da177e4 LT |
84 | sock_put(sk); |
85 | kfree(ra); | |
86 | return 0; | |
87 | } | |
88 | } | |
63159f29 | 89 | if (!new_ra) { |
1da177e4 LT |
90 | write_unlock_bh(&ip6_ra_lock); |
91 | return -ENOBUFS; | |
92 | } | |
93 | new_ra->sk = sk; | |
94 | new_ra->sel = sel; | |
1da177e4 LT |
95 | new_ra->next = ra; |
96 | *rap = new_ra; | |
97 | sock_hold(sk); | |
98 | write_unlock_bh(&ip6_ra_lock); | |
99 | return 0; | |
100 | } | |
101 | ||
e7712f1a YH |
102 | struct ipv6_txoptions *ipv6_update_options(struct sock *sk, |
103 | struct ipv6_txoptions *opt) | |
104 | { | |
105 | if (inet_sk(sk)->is_icsk) { | |
106 | if (opt && | |
107 | !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) && | |
c720c7e8 | 108 | inet_sk(sk)->inet_daddr != LOOPBACK4_IPV6) { |
e7712f1a YH |
109 | struct inet_connection_sock *icsk = inet_csk(sk); |
110 | icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen; | |
111 | icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); | |
112 | } | |
e7712f1a | 113 | } |
45f6fad8 ED |
114 | opt = xchg((__force struct ipv6_txoptions **)&inet6_sk(sk)->opt, |
115 | opt); | |
e7712f1a YH |
116 | sk_dst_reset(sk); |
117 | ||
118 | return opt; | |
119 | } | |
120 | ||
baf606d9 MRL |
121 | static bool setsockopt_needs_rtnl(int optname) |
122 | { | |
123 | switch (optname) { | |
8651be8f | 124 | case IPV6_ADDRFORM: |
baf606d9 MRL |
125 | case IPV6_ADD_MEMBERSHIP: |
126 | case IPV6_DROP_MEMBERSHIP: | |
c4a6853d MRL |
127 | case IPV6_JOIN_ANYCAST: |
128 | case IPV6_LEAVE_ANYCAST: | |
baf606d9 MRL |
129 | case MCAST_JOIN_GROUP: |
130 | case MCAST_LEAVE_GROUP: | |
54ff9ef3 MRL |
131 | case MCAST_JOIN_SOURCE_GROUP: |
132 | case MCAST_LEAVE_SOURCE_GROUP: | |
133 | case MCAST_BLOCK_SOURCE: | |
134 | case MCAST_UNBLOCK_SOURCE: | |
135 | case MCAST_MSFILTER: | |
baf606d9 MRL |
136 | return true; |
137 | } | |
138 | return false; | |
139 | } | |
140 | ||
3fdadf7d | 141 | static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 142 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
143 | { |
144 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 145 | struct net *net = sock_net(sk); |
1da177e4 LT |
146 | int val, valbool; |
147 | int retv = -ENOPROTOOPT; | |
baf606d9 | 148 | bool needs_rtnl = setsockopt_needs_rtnl(optname); |
1da177e4 | 149 | |
63159f29 | 150 | if (!optval) |
67ba4152 | 151 | val = 0; |
b2a9d7c2 YH |
152 | else { |
153 | if (optlen >= sizeof(int)) { | |
154 | if (get_user(val, (int __user *) optval)) | |
155 | return -EFAULT; | |
156 | } else | |
157 | val = 0; | |
158 | } | |
1da177e4 | 159 | |
67ba4152 | 160 | valbool = (val != 0); |
1da177e4 | 161 | |
7bc570c8 YH |
162 | if (ip6_mroute_opt(optname)) |
163 | return ip6_mroute_setsockopt(sk, optname, optval, optlen); | |
164 | ||
baf606d9 MRL |
165 | if (needs_rtnl) |
166 | rtnl_lock(); | |
1da177e4 LT |
167 | lock_sock(sk); |
168 | ||
169 | switch (optname) { | |
170 | ||
171 | case IPV6_ADDRFORM: | |
b2a9d7c2 YH |
172 | if (optlen < sizeof(int)) |
173 | goto e_inval; | |
1da177e4 LT |
174 | if (val == PF_INET) { |
175 | struct ipv6_txoptions *opt; | |
176 | struct sk_buff *pktopt; | |
177 | ||
49d074f4 DL |
178 | if (sk->sk_type == SOCK_RAW) |
179 | break; | |
180 | ||
9596cc82 DL |
181 | if (sk->sk_protocol == IPPROTO_UDP || |
182 | sk->sk_protocol == IPPROTO_UDPLITE) { | |
183 | struct udp_sock *up = udp_sk(sk); | |
184 | if (up->pending == AF_INET6) { | |
185 | retv = -EBUSY; | |
186 | break; | |
187 | } | |
188 | } else if (sk->sk_protocol != IPPROTO_TCP) | |
1da177e4 LT |
189 | break; |
190 | ||
191 | if (sk->sk_state != TCP_ESTABLISHED) { | |
192 | retv = -ENOTCONN; | |
193 | break; | |
194 | } | |
195 | ||
196 | if (ipv6_only_sock(sk) || | |
efe4208f | 197 | !ipv6_addr_v4mapped(&sk->sk_v6_daddr)) { |
1da177e4 LT |
198 | retv = -EADDRNOTAVAIL; |
199 | break; | |
200 | } | |
201 | ||
202 | fl6_free_socklist(sk); | |
8651be8f | 203 | __ipv6_sock_mc_close(sk); |
1da177e4 | 204 | |
e6848976 ACM |
205 | /* |
206 | * Sock is moving from IPv6 to IPv4 (sk_prot), so | |
207 | * remove it from the refcnt debug socks count in the | |
208 | * original family... | |
209 | */ | |
210 | sk_refcnt_debug_dec(sk); | |
211 | ||
1da177e4 | 212 | if (sk->sk_protocol == IPPROTO_TCP) { |
d83d8461 | 213 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 | 214 | local_bh_disable(); |
c29a0bc4 PE |
215 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
216 | sock_prot_inuse_add(net, &tcp_prot, 1); | |
1da177e4 LT |
217 | local_bh_enable(); |
218 | sk->sk_prot = &tcp_prot; | |
d83d8461 | 219 | icsk->icsk_af_ops = &ipv4_specific; |
1da177e4 LT |
220 | sk->sk_socket->ops = &inet_stream_ops; |
221 | sk->sk_family = PF_INET; | |
d83d8461 | 222 | tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); |
1da177e4 | 223 | } else { |
ba4e58ec GR |
224 | struct proto *prot = &udp_prot; |
225 | ||
db8dac20 | 226 | if (sk->sk_protocol == IPPROTO_UDPLITE) |
ba4e58ec | 227 | prot = &udplite_prot; |
1da177e4 | 228 | local_bh_disable(); |
c29a0bc4 PE |
229 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
230 | sock_prot_inuse_add(net, prot, 1); | |
1da177e4 | 231 | local_bh_enable(); |
ba4e58ec | 232 | sk->sk_prot = prot; |
1da177e4 LT |
233 | sk->sk_socket->ops = &inet_dgram_ops; |
234 | sk->sk_family = PF_INET; | |
235 | } | |
45f6fad8 ED |
236 | opt = xchg((__force struct ipv6_txoptions **)&np->opt, |
237 | NULL); | |
238 | if (opt) { | |
239 | atomic_sub(opt->tot_len, &sk->sk_omem_alloc); | |
240 | txopt_put(opt); | |
241 | } | |
1da177e4 | 242 | pktopt = xchg(&np->pktoptions, NULL); |
800d55f1 | 243 | kfree_skb(pktopt); |
1da177e4 LT |
244 | |
245 | sk->sk_destruct = inet_sock_destruct; | |
e6848976 ACM |
246 | /* |
247 | * ... and add it to the refcnt debug socks count | |
248 | * in the new family. -acme | |
249 | */ | |
250 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
251 | module_put(THIS_MODULE); |
252 | retv = 0; | |
253 | break; | |
254 | } | |
255 | goto e_inval; | |
256 | ||
257 | case IPV6_V6ONLY: | |
b2a9d7c2 | 258 | if (optlen < sizeof(int) || |
c720c7e8 | 259 | inet_sk(sk)->inet_num) |
1da177e4 | 260 | goto e_inval; |
9fe516ba | 261 | sk->sk_ipv6only = valbool; |
1da177e4 LT |
262 | retv = 0; |
263 | break; | |
264 | ||
333fad53 | 265 | case IPV6_RECVPKTINFO: |
b2a9d7c2 YH |
266 | if (optlen < sizeof(int)) |
267 | goto e_inval; | |
1da177e4 LT |
268 | np->rxopt.bits.rxinfo = valbool; |
269 | retv = 0; | |
270 | break; | |
1ab1457c | 271 | |
333fad53 | 272 | case IPV6_2292PKTINFO: |
b2a9d7c2 YH |
273 | if (optlen < sizeof(int)) |
274 | goto e_inval; | |
333fad53 YH |
275 | np->rxopt.bits.rxoinfo = valbool; |
276 | retv = 0; | |
277 | break; | |
1da177e4 | 278 | |
333fad53 | 279 | case IPV6_RECVHOPLIMIT: |
b2a9d7c2 YH |
280 | if (optlen < sizeof(int)) |
281 | goto e_inval; | |
1da177e4 LT |
282 | np->rxopt.bits.rxhlim = valbool; |
283 | retv = 0; | |
284 | break; | |
285 | ||
333fad53 | 286 | case IPV6_2292HOPLIMIT: |
b2a9d7c2 YH |
287 | if (optlen < sizeof(int)) |
288 | goto e_inval; | |
333fad53 YH |
289 | np->rxopt.bits.rxohlim = valbool; |
290 | retv = 0; | |
291 | break; | |
292 | ||
293 | case IPV6_RECVRTHDR: | |
b2a9d7c2 YH |
294 | if (optlen < sizeof(int)) |
295 | goto e_inval; | |
4c752098 | 296 | np->rxopt.bits.srcrt = valbool; |
1da177e4 LT |
297 | retv = 0; |
298 | break; | |
299 | ||
333fad53 | 300 | case IPV6_2292RTHDR: |
b2a9d7c2 YH |
301 | if (optlen < sizeof(int)) |
302 | goto e_inval; | |
4c752098 | 303 | np->rxopt.bits.osrcrt = valbool; |
333fad53 YH |
304 | retv = 0; |
305 | break; | |
306 | ||
307 | case IPV6_RECVHOPOPTS: | |
b2a9d7c2 YH |
308 | if (optlen < sizeof(int)) |
309 | goto e_inval; | |
1da177e4 LT |
310 | np->rxopt.bits.hopopts = valbool; |
311 | retv = 0; | |
312 | break; | |
313 | ||
333fad53 | 314 | case IPV6_2292HOPOPTS: |
b2a9d7c2 YH |
315 | if (optlen < sizeof(int)) |
316 | goto e_inval; | |
333fad53 YH |
317 | np->rxopt.bits.ohopopts = valbool; |
318 | retv = 0; | |
319 | break; | |
320 | ||
321 | case IPV6_RECVDSTOPTS: | |
b2a9d7c2 YH |
322 | if (optlen < sizeof(int)) |
323 | goto e_inval; | |
1da177e4 LT |
324 | np->rxopt.bits.dstopts = valbool; |
325 | retv = 0; | |
326 | break; | |
327 | ||
333fad53 | 328 | case IPV6_2292DSTOPTS: |
b2a9d7c2 YH |
329 | if (optlen < sizeof(int)) |
330 | goto e_inval; | |
333fad53 YH |
331 | np->rxopt.bits.odstopts = valbool; |
332 | retv = 0; | |
333 | break; | |
334 | ||
41a1f8ea | 335 | case IPV6_TCLASS: |
b2a9d7c2 YH |
336 | if (optlen < sizeof(int)) |
337 | goto e_inval; | |
d0ee011f | 338 | if (val < -1 || val > 0xff) |
41a1f8ea | 339 | goto e_inval; |
26ced1e4 GR |
340 | /* RFC 3542, 6.5: default traffic class of 0x0 */ |
341 | if (val == -1) | |
342 | val = 0; | |
41a1f8ea YH |
343 | np->tclass = val; |
344 | retv = 0; | |
345 | break; | |
1ab1457c | 346 | |
41a1f8ea | 347 | case IPV6_RECVTCLASS: |
b2a9d7c2 YH |
348 | if (optlen < sizeof(int)) |
349 | goto e_inval; | |
41a1f8ea YH |
350 | np->rxopt.bits.rxtclass = valbool; |
351 | retv = 0; | |
352 | break; | |
353 | ||
1da177e4 | 354 | case IPV6_FLOWINFO: |
b2a9d7c2 YH |
355 | if (optlen < sizeof(int)) |
356 | goto e_inval; | |
1da177e4 LT |
357 | np->rxopt.bits.rxflow = valbool; |
358 | retv = 0; | |
359 | break; | |
360 | ||
793b1473 BH |
361 | case IPV6_RECVPATHMTU: |
362 | if (optlen < sizeof(int)) | |
363 | goto e_inval; | |
364 | np->rxopt.bits.rxpmtu = valbool; | |
365 | retv = 0; | |
366 | break; | |
367 | ||
6c468622 | 368 | case IPV6_TRANSPARENT: |
af31f412 EB |
369 | if (valbool && !ns_capable(net->user_ns, CAP_NET_ADMIN) && |
370 | !ns_capable(net->user_ns, CAP_NET_RAW)) { | |
b889416b BS |
371 | retv = -EPERM; |
372 | break; | |
373 | } | |
6c468622 BS |
374 | if (optlen < sizeof(int)) |
375 | goto e_inval; | |
376 | /* we don't have a separate transparent bit for IPV6 we use the one in the IPv4 socket */ | |
377 | inet_sk(sk)->transparent = valbool; | |
378 | retv = 0; | |
379 | break; | |
380 | ||
381 | case IPV6_RECVORIGDSTADDR: | |
382 | if (optlen < sizeof(int)) | |
383 | goto e_inval; | |
384 | np->rxopt.bits.rxorigdstaddr = valbool; | |
385 | retv = 0; | |
386 | break; | |
387 | ||
333fad53 YH |
388 | case IPV6_HOPOPTS: |
389 | case IPV6_RTHDRDSTOPTS: | |
390 | case IPV6_RTHDR: | |
391 | case IPV6_DSTOPTS: | |
392 | { | |
393 | struct ipv6_txoptions *opt; | |
aea7427f SW |
394 | |
395 | /* remove any sticky options header with a zero option | |
396 | * length, per RFC3542. | |
397 | */ | |
333fad53 | 398 | if (optlen == 0) |
cb422c46 | 399 | optval = NULL; |
63159f29 | 400 | else if (!optval) |
cfb266c0 | 401 | goto e_inval; |
aea7427f SW |
402 | else if (optlen < sizeof(struct ipv6_opt_hdr) || |
403 | optlen & 0x7 || optlen > 8 * 255) | |
404 | goto e_inval; | |
333fad53 YH |
405 | |
406 | /* hop-by-hop / destination options are privileged option */ | |
407 | retv = -EPERM; | |
af31f412 | 408 | if (optname != IPV6_RTHDR && !ns_capable(net->user_ns, CAP_NET_RAW)) |
333fad53 YH |
409 | break; |
410 | ||
1e1d04e6 HFS |
411 | opt = rcu_dereference_protected(np->opt, |
412 | lockdep_sock_is_held(sk)); | |
45f6fad8 | 413 | opt = ipv6_renew_options(sk, opt, optname, |
333fad53 YH |
414 | (struct ipv6_opt_hdr __user *)optval, |
415 | optlen); | |
416 | if (IS_ERR(opt)) { | |
417 | retv = PTR_ERR(opt); | |
418 | break; | |
419 | } | |
420 | ||
421 | /* routing header option needs extra check */ | |
6e093d9d | 422 | retv = -EINVAL; |
dfee0a72 | 423 | if (optname == IPV6_RTHDR && opt && opt->srcrt) { |
333fad53 | 424 | struct ipv6_rt_hdr *rthdr = opt->srcrt; |
280a9d34 | 425 | switch (rthdr->type) { |
07a93626 | 426 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
280a9d34 | 427 | case IPV6_SRCRT_TYPE_2: |
6e093d9d BH |
428 | if (rthdr->hdrlen != 2 || |
429 | rthdr->segments_left != 1) | |
430 | goto sticky_done; | |
431 | ||
280a9d34 | 432 | break; |
bb4dbf9e | 433 | #endif |
a149e7c7 DL |
434 | case IPV6_SRCRT_TYPE_4: |
435 | { | |
436 | struct ipv6_sr_hdr *srh = (struct ipv6_sr_hdr *) | |
437 | opt->srcrt; | |
438 | ||
439 | if (!seg6_validate_srh(srh, optlen)) | |
440 | goto sticky_done; | |
441 | break; | |
442 | } | |
280a9d34 | 443 | default: |
333fad53 | 444 | goto sticky_done; |
280a9d34 | 445 | } |
333fad53 YH |
446 | } |
447 | ||
448 | retv = 0; | |
e7712f1a | 449 | opt = ipv6_update_options(sk, opt); |
333fad53 | 450 | sticky_done: |
45f6fad8 ED |
451 | if (opt) { |
452 | atomic_sub(opt->tot_len, &sk->sk_omem_alloc); | |
453 | txopt_put(opt); | |
454 | } | |
333fad53 YH |
455 | break; |
456 | } | |
457 | ||
b24a2516 YH |
458 | case IPV6_PKTINFO: |
459 | { | |
460 | struct in6_pktinfo pkt; | |
461 | ||
462 | if (optlen == 0) | |
463 | goto e_inval; | |
63159f29 | 464 | else if (optlen < sizeof(struct in6_pktinfo) || !optval) |
b24a2516 YH |
465 | goto e_inval; |
466 | ||
914d1164 | 467 | if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) { |
b24a2516 YH |
468 | retv = -EFAULT; |
469 | break; | |
470 | } | |
471 | if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if) | |
472 | goto e_inval; | |
473 | ||
474 | np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex; | |
4e3fd7a0 | 475 | np->sticky_pktinfo.ipi6_addr = pkt.ipi6_addr; |
b24a2516 YH |
476 | retv = 0; |
477 | break; | |
478 | } | |
479 | ||
333fad53 | 480 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
481 | { |
482 | struct ipv6_txoptions *opt = NULL; | |
483 | struct msghdr msg; | |
4c9483b2 | 484 | struct flowi6 fl6; |
ad1e46a8 | 485 | struct sockcm_cookie sockc_junk; |
26879da5 | 486 | struct ipcm6_cookie ipc6; |
1da177e4 | 487 | |
4c9483b2 DM |
488 | memset(&fl6, 0, sizeof(fl6)); |
489 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
490 | fl6.flowi6_mark = sk->sk_mark; | |
1da177e4 LT |
491 | |
492 | if (optlen == 0) | |
493 | goto update; | |
494 | ||
495 | /* 1K is probably excessive | |
496 | * 1K is surely not enough, 2K per standard header is 16K. | |
497 | */ | |
498 | retv = -EINVAL; | |
499 | if (optlen > 64*1024) | |
500 | break; | |
501 | ||
502 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
503 | retv = -ENOBUFS; | |
63159f29 | 504 | if (!opt) |
1da177e4 LT |
505 | break; |
506 | ||
507 | memset(opt, 0, sizeof(*opt)); | |
45f6fad8 | 508 | atomic_set(&opt->refcnt, 1); |
1da177e4 LT |
509 | opt->tot_len = sizeof(*opt) + optlen; |
510 | retv = -EFAULT; | |
511 | if (copy_from_user(opt+1, optval, optlen)) | |
512 | goto done; | |
513 | ||
514 | msg.msg_controllen = optlen; | |
67ba4152 | 515 | msg.msg_control = (void *)(opt+1); |
26879da5 | 516 | ipc6.opt = opt; |
1da177e4 | 517 | |
26879da5 | 518 | retv = ip6_datagram_send_ctl(net, sk, &msg, &fl6, &ipc6, &sockc_junk); |
1da177e4 LT |
519 | if (retv) |
520 | goto done; | |
521 | update: | |
522 | retv = 0; | |
e7712f1a | 523 | opt = ipv6_update_options(sk, opt); |
1da177e4 | 524 | done: |
45f6fad8 ED |
525 | if (opt) { |
526 | atomic_sub(opt->tot_len, &sk->sk_omem_alloc); | |
527 | txopt_put(opt); | |
528 | } | |
1da177e4 LT |
529 | break; |
530 | } | |
531 | case IPV6_UNICAST_HOPS: | |
b2a9d7c2 YH |
532 | if (optlen < sizeof(int)) |
533 | goto e_inval; | |
1da177e4 LT |
534 | if (val > 255 || val < -1) |
535 | goto e_inval; | |
536 | np->hop_limit = val; | |
537 | retv = 0; | |
538 | break; | |
539 | ||
540 | case IPV6_MULTICAST_HOPS: | |
541 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 542 | break; |
b2a9d7c2 YH |
543 | if (optlen < sizeof(int)) |
544 | goto e_inval; | |
1da177e4 LT |
545 | if (val > 255 || val < -1) |
546 | goto e_inval; | |
2a38e6d5 | 547 | np->mcast_hops = (val == -1 ? IPV6_DEFAULT_MCASTHOPS : val); |
1da177e4 LT |
548 | retv = 0; |
549 | break; | |
550 | ||
551 | case IPV6_MULTICAST_LOOP: | |
b2a9d7c2 YH |
552 | if (optlen < sizeof(int)) |
553 | goto e_inval; | |
28d44882 YH |
554 | if (val != valbool) |
555 | goto e_inval; | |
1da177e4 LT |
556 | np->mc_loop = valbool; |
557 | retv = 0; | |
558 | break; | |
559 | ||
c4062dfc EH |
560 | case IPV6_UNICAST_IF: |
561 | { | |
562 | struct net_device *dev = NULL; | |
563 | int ifindex; | |
564 | ||
565 | if (optlen != sizeof(int)) | |
566 | goto e_inval; | |
567 | ||
568 | ifindex = (__force int)ntohl((__force __be32)val); | |
569 | if (ifindex == 0) { | |
570 | np->ucast_oif = 0; | |
571 | retv = 0; | |
572 | break; | |
573 | } | |
574 | ||
575 | dev = dev_get_by_index(net, ifindex); | |
576 | retv = -EADDRNOTAVAIL; | |
577 | if (!dev) | |
578 | break; | |
579 | dev_put(dev); | |
580 | ||
581 | retv = -EINVAL; | |
582 | if (sk->sk_bound_dev_if) | |
583 | break; | |
584 | ||
585 | np->ucast_oif = ifindex; | |
586 | retv = 0; | |
587 | break; | |
588 | } | |
589 | ||
1da177e4 LT |
590 | case IPV6_MULTICAST_IF: |
591 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 592 | break; |
b2a9d7c2 YH |
593 | if (optlen < sizeof(int)) |
594 | goto e_inval; | |
1da177e4 | 595 | |
4953f0fc | 596 | if (val) { |
55b80503 ED |
597 | struct net_device *dev; |
598 | ||
4953f0fc BH |
599 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) |
600 | goto e_inval; | |
601 | ||
55b80503 ED |
602 | dev = dev_get_by_index(net, val); |
603 | if (!dev) { | |
4953f0fc BH |
604 | retv = -ENODEV; |
605 | break; | |
606 | } | |
55b80503 | 607 | dev_put(dev); |
1da177e4 LT |
608 | } |
609 | np->mcast_oif = val; | |
610 | retv = 0; | |
611 | break; | |
612 | case IPV6_ADD_MEMBERSHIP: | |
613 | case IPV6_DROP_MEMBERSHIP: | |
614 | { | |
615 | struct ipv6_mreq mreq; | |
616 | ||
a28398ba WC |
617 | if (optlen < sizeof(struct ipv6_mreq)) |
618 | goto e_inval; | |
619 | ||
a96fb49b FL |
620 | retv = -EPROTO; |
621 | if (inet_sk(sk)->is_icsk) | |
622 | break; | |
623 | ||
1da177e4 LT |
624 | retv = -EFAULT; |
625 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
626 | break; | |
627 | ||
628 | if (optname == IPV6_ADD_MEMBERSHIP) | |
54ff9ef3 | 629 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); |
1da177e4 | 630 | else |
54ff9ef3 | 631 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); |
1da177e4 LT |
632 | break; |
633 | } | |
634 | case IPV6_JOIN_ANYCAST: | |
635 | case IPV6_LEAVE_ANYCAST: | |
636 | { | |
637 | struct ipv6_mreq mreq; | |
638 | ||
a28398ba | 639 | if (optlen < sizeof(struct ipv6_mreq)) |
1da177e4 LT |
640 | goto e_inval; |
641 | ||
642 | retv = -EFAULT; | |
643 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
644 | break; | |
645 | ||
646 | if (optname == IPV6_JOIN_ANYCAST) | |
647 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
648 | else | |
649 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
650 | break; | |
651 | } | |
652 | case MCAST_JOIN_GROUP: | |
653 | case MCAST_LEAVE_GROUP: | |
654 | { | |
655 | struct group_req greq; | |
656 | struct sockaddr_in6 *psin6; | |
657 | ||
a28398ba WC |
658 | if (optlen < sizeof(struct group_req)) |
659 | goto e_inval; | |
660 | ||
1da177e4 LT |
661 | retv = -EFAULT; |
662 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
663 | break; | |
664 | if (greq.gr_group.ss_family != AF_INET6) { | |
665 | retv = -EADDRNOTAVAIL; | |
666 | break; | |
667 | } | |
668 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
669 | if (optname == MCAST_JOIN_GROUP) | |
54ff9ef3 MRL |
670 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, |
671 | &psin6->sin6_addr); | |
1da177e4 | 672 | else |
54ff9ef3 MRL |
673 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, |
674 | &psin6->sin6_addr); | |
1da177e4 LT |
675 | break; |
676 | } | |
677 | case MCAST_JOIN_SOURCE_GROUP: | |
678 | case MCAST_LEAVE_SOURCE_GROUP: | |
679 | case MCAST_BLOCK_SOURCE: | |
680 | case MCAST_UNBLOCK_SOURCE: | |
681 | { | |
682 | struct group_source_req greqs; | |
683 | int omode, add; | |
684 | ||
a28398ba | 685 | if (optlen < sizeof(struct group_source_req)) |
1da177e4 LT |
686 | goto e_inval; |
687 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
688 | retv = -EFAULT; | |
689 | break; | |
690 | } | |
691 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
692 | greqs.gsr_source.ss_family != AF_INET6) { | |
693 | retv = -EADDRNOTAVAIL; | |
694 | break; | |
695 | } | |
696 | if (optname == MCAST_BLOCK_SOURCE) { | |
697 | omode = MCAST_EXCLUDE; | |
698 | add = 1; | |
699 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
700 | omode = MCAST_EXCLUDE; | |
701 | add = 0; | |
702 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
703 | struct sockaddr_in6 *psin6; | |
704 | ||
705 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
54ff9ef3 MRL |
706 | retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, |
707 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
708 | /* prior join w/ different source is ok */ |
709 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
710 | break; |
711 | omode = MCAST_INCLUDE; | |
712 | add = 1; | |
c9e3e8b6 | 713 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
714 | omode = MCAST_INCLUDE; |
715 | add = 0; | |
716 | } | |
717 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
718 | break; | |
719 | } | |
720 | case MCAST_MSFILTER: | |
721 | { | |
1da177e4 LT |
722 | struct group_filter *gsf; |
723 | ||
724 | if (optlen < GROUP_FILTER_SIZE(0)) | |
725 | goto e_inval; | |
726 | if (optlen > sysctl_optmem_max) { | |
727 | retv = -ENOBUFS; | |
728 | break; | |
729 | } | |
67ba4152 | 730 | gsf = kmalloc(optlen, GFP_KERNEL); |
cfcabdcc | 731 | if (!gsf) { |
1da177e4 LT |
732 | retv = -ENOBUFS; |
733 | break; | |
734 | } | |
735 | retv = -EFAULT; | |
736 | if (copy_from_user(gsf, optval, optlen)) { | |
737 | kfree(gsf); | |
738 | break; | |
739 | } | |
740 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
741 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
742 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
743 | kfree(gsf); | |
744 | retv = -ENOBUFS; | |
745 | break; | |
746 | } | |
747 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
748 | kfree(gsf); | |
749 | retv = -EINVAL; | |
750 | break; | |
751 | } | |
752 | retv = ip6_mc_msfilter(sk, gsf); | |
753 | kfree(gsf); | |
754 | ||
755 | break; | |
756 | } | |
757 | case IPV6_ROUTER_ALERT: | |
b2a9d7c2 YH |
758 | if (optlen < sizeof(int)) |
759 | goto e_inval; | |
725a8ff0 | 760 | retv = ip6_ra_control(sk, val); |
1da177e4 LT |
761 | break; |
762 | case IPV6_MTU_DISCOVER: | |
b2a9d7c2 YH |
763 | if (optlen < sizeof(int)) |
764 | goto e_inval; | |
0b95227a | 765 | if (val < IPV6_PMTUDISC_DONT || val > IPV6_PMTUDISC_OMIT) |
1da177e4 LT |
766 | goto e_inval; |
767 | np->pmtudisc = val; | |
768 | retv = 0; | |
769 | break; | |
770 | case IPV6_MTU: | |
b2a9d7c2 YH |
771 | if (optlen < sizeof(int)) |
772 | goto e_inval; | |
1da177e4 LT |
773 | if (val && val < IPV6_MIN_MTU) |
774 | goto e_inval; | |
775 | np->frag_size = val; | |
776 | retv = 0; | |
777 | break; | |
778 | case IPV6_RECVERR: | |
b2a9d7c2 YH |
779 | if (optlen < sizeof(int)) |
780 | goto e_inval; | |
1da177e4 LT |
781 | np->recverr = valbool; |
782 | if (!val) | |
783 | skb_queue_purge(&sk->sk_error_queue); | |
784 | retv = 0; | |
785 | break; | |
786 | case IPV6_FLOWINFO_SEND: | |
b2a9d7c2 YH |
787 | if (optlen < sizeof(int)) |
788 | goto e_inval; | |
1da177e4 LT |
789 | np->sndflow = valbool; |
790 | retv = 0; | |
791 | break; | |
792 | case IPV6_FLOWLABEL_MGR: | |
793 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
794 | break; | |
795 | case IPV6_IPSEC_POLICY: | |
796 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 | 797 | retv = -EPERM; |
af31f412 | 798 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
6fc0b4a7 | 799 | break; |
1da177e4 LT |
800 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
801 | break; | |
802 | ||
7cbca67c YH |
803 | case IPV6_ADDR_PREFERENCES: |
804 | { | |
805 | unsigned int pref = 0; | |
806 | unsigned int prefmask = ~0; | |
807 | ||
b2a9d7c2 YH |
808 | if (optlen < sizeof(int)) |
809 | goto e_inval; | |
810 | ||
7cbca67c YH |
811 | retv = -EINVAL; |
812 | ||
813 | /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ | |
814 | switch (val & (IPV6_PREFER_SRC_PUBLIC| | |
815 | IPV6_PREFER_SRC_TMP| | |
816 | IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { | |
817 | case IPV6_PREFER_SRC_PUBLIC: | |
818 | pref |= IPV6_PREFER_SRC_PUBLIC; | |
819 | break; | |
820 | case IPV6_PREFER_SRC_TMP: | |
821 | pref |= IPV6_PREFER_SRC_TMP; | |
822 | break; | |
823 | case IPV6_PREFER_SRC_PUBTMP_DEFAULT: | |
824 | break; | |
825 | case 0: | |
826 | goto pref_skip_pubtmp; | |
827 | default: | |
828 | goto e_inval; | |
829 | } | |
830 | ||
831 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| | |
832 | IPV6_PREFER_SRC_TMP); | |
833 | pref_skip_pubtmp: | |
834 | ||
835 | /* check HOME/COA conflicts */ | |
836 | switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { | |
837 | case IPV6_PREFER_SRC_HOME: | |
838 | break; | |
839 | case IPV6_PREFER_SRC_COA: | |
840 | pref |= IPV6_PREFER_SRC_COA; | |
841 | case 0: | |
842 | goto pref_skip_coa; | |
843 | default: | |
844 | goto e_inval; | |
845 | } | |
846 | ||
847 | prefmask &= ~IPV6_PREFER_SRC_COA; | |
848 | pref_skip_coa: | |
849 | ||
850 | /* check CGA/NONCGA conflicts */ | |
851 | switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { | |
852 | case IPV6_PREFER_SRC_CGA: | |
853 | case IPV6_PREFER_SRC_NONCGA: | |
854 | case 0: | |
855 | break; | |
856 | default: | |
857 | goto e_inval; | |
858 | } | |
859 | ||
860 | np->srcprefs = (np->srcprefs & prefmask) | pref; | |
861 | retv = 0; | |
862 | ||
863 | break; | |
864 | } | |
e802af9c SH |
865 | case IPV6_MINHOPCOUNT: |
866 | if (optlen < sizeof(int)) | |
867 | goto e_inval; | |
868 | if (val < 0 || val > 255) | |
869 | goto e_inval; | |
870 | np->min_hopcount = val; | |
d4596bad | 871 | retv = 0; |
793b1473 BH |
872 | break; |
873 | case IPV6_DONTFRAG: | |
874 | np->dontfrag = valbool; | |
e802af9c SH |
875 | retv = 0; |
876 | break; | |
cb1ce2ef TH |
877 | case IPV6_AUTOFLOWLABEL: |
878 | np->autoflowlabel = valbool; | |
879 | retv = 0; | |
880 | break; | |
0cc0aa61 WB |
881 | case IPV6_RECVFRAGSIZE: |
882 | np->rxopt.bits.recvfragsize = valbool; | |
883 | retv = 0; | |
884 | break; | |
1da177e4 | 885 | } |
7cbca67c | 886 | |
1da177e4 | 887 | release_sock(sk); |
baf606d9 MRL |
888 | if (needs_rtnl) |
889 | rtnl_unlock(); | |
1da177e4 | 890 | |
1da177e4 LT |
891 | return retv; |
892 | ||
893 | e_inval: | |
894 | release_sock(sk); | |
baf606d9 MRL |
895 | if (needs_rtnl) |
896 | rtnl_unlock(); | |
1da177e4 LT |
897 | return -EINVAL; |
898 | } | |
899 | ||
3fdadf7d | 900 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 901 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
902 | { |
903 | int err; | |
904 | ||
905 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
906 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
907 | ||
908 | if (level != SOL_IPV6) | |
909 | return -ENOPROTOOPT; | |
910 | ||
911 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
912 | #ifdef CONFIG_NETFILTER | |
913 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
914 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
915 | optname != IPV6_XFRM_POLICY) { | |
916 | lock_sock(sk); | |
917 | err = nf_setsockopt(sk, PF_INET6, optname, optval, | |
918 | optlen); | |
919 | release_sock(sk); | |
920 | } | |
921 | #endif | |
922 | return err; | |
923 | } | |
7159039a | 924 | EXPORT_SYMBOL(ipv6_setsockopt); |
3fdadf7d DM |
925 | |
926 | #ifdef CONFIG_COMPAT | |
927 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
b7058842 | 928 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
929 | { |
930 | int err; | |
931 | ||
932 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
933 | if (udp_prot.compat_setsockopt != NULL) |
934 | return udp_prot.compat_setsockopt(sk, level, optname, | |
935 | optval, optlen); | |
936 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
937 | } |
938 | ||
939 | if (level != SOL_IPV6) | |
940 | return -ENOPROTOOPT; | |
941 | ||
dae50295 DS |
942 | if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) |
943 | return compat_mc_setsockopt(sk, level, optname, optval, optlen, | |
944 | ipv6_setsockopt); | |
945 | ||
3fdadf7d DM |
946 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); |
947 | #ifdef CONFIG_NETFILTER | |
948 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
949 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
543d9cfe | 950 | optname != IPV6_XFRM_POLICY) { |
3fdadf7d | 951 | lock_sock(sk); |
543d9cfe ACM |
952 | err = compat_nf_setsockopt(sk, PF_INET6, optname, |
953 | optval, optlen); | |
3fdadf7d DM |
954 | release_sock(sk); |
955 | } | |
956 | #endif | |
957 | return err; | |
958 | } | |
543d9cfe | 959 | EXPORT_SYMBOL(compat_ipv6_setsockopt); |
3fdadf7d DM |
960 | #endif |
961 | ||
28693079 | 962 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, |
4c6510a7 | 963 | int optname, char __user *optval, int len) |
333fad53 | 964 | { |
28693079 DM |
965 | struct ipv6_opt_hdr *hdr; |
966 | ||
4c6510a7 YH |
967 | if (!opt) |
968 | return 0; | |
969 | ||
67ba4152 | 970 | switch (optname) { |
4c6510a7 YH |
971 | case IPV6_HOPOPTS: |
972 | hdr = opt->hopopt; | |
973 | break; | |
974 | case IPV6_RTHDRDSTOPTS: | |
975 | hdr = opt->dst0opt; | |
976 | break; | |
977 | case IPV6_RTHDR: | |
978 | hdr = (struct ipv6_opt_hdr *)opt->srcrt; | |
979 | break; | |
980 | case IPV6_DSTOPTS: | |
981 | hdr = opt->dst1opt; | |
982 | break; | |
983 | default: | |
984 | return -EINVAL; /* should not happen */ | |
985 | } | |
986 | ||
987 | if (!hdr) | |
333fad53 | 988 | return 0; |
28693079 | 989 | |
d2b02ed9 | 990 | len = min_t(unsigned int, len, ipv6_optlen(hdr)); |
660adc6e | 991 | if (copy_to_user(optval, hdr, len)) |
333fad53 | 992 | return -EFAULT; |
95b496b6 | 993 | return len; |
333fad53 YH |
994 | } |
995 | ||
3fdadf7d | 996 | static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
95c96174 | 997 | char __user *optval, int __user *optlen, unsigned int flags) |
1da177e4 LT |
998 | { |
999 | struct ipv6_pinfo *np = inet6_sk(sk); | |
1000 | int len; | |
1001 | int val; | |
1002 | ||
7bc570c8 YH |
1003 | if (ip6_mroute_opt(optname)) |
1004 | return ip6_mroute_getsockopt(sk, optname, optval, optlen); | |
1005 | ||
1da177e4 LT |
1006 | if (get_user(len, optlen)) |
1007 | return -EFAULT; | |
1008 | switch (optname) { | |
1009 | case IPV6_ADDRFORM: | |
1010 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 1011 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 | 1012 | sk->sk_protocol != IPPROTO_TCP) |
1717699c | 1013 | return -ENOPROTOOPT; |
1da177e4 LT |
1014 | if (sk->sk_state != TCP_ESTABLISHED) |
1015 | return -ENOTCONN; | |
1016 | val = sk->sk_family; | |
1017 | break; | |
1018 | case MCAST_MSFILTER: | |
1019 | { | |
1020 | struct group_filter gsf; | |
1021 | int err; | |
1022 | ||
1023 | if (len < GROUP_FILTER_SIZE(0)) | |
1024 | return -EINVAL; | |
1025 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
1026 | return -EFAULT; | |
20c61fbd YH |
1027 | if (gsf.gf_group.ss_family != AF_INET6) |
1028 | return -EADDRNOTAVAIL; | |
1da177e4 LT |
1029 | lock_sock(sk); |
1030 | err = ip6_mc_msfget(sk, &gsf, | |
1031 | (struct group_filter __user *)optval, optlen); | |
1032 | release_sock(sk); | |
1033 | return err; | |
1034 | } | |
1035 | ||
333fad53 | 1036 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
1037 | { |
1038 | struct msghdr msg; | |
1039 | struct sk_buff *skb; | |
1040 | ||
1041 | if (sk->sk_type != SOCK_STREAM) | |
1042 | return -ENOPROTOOPT; | |
1043 | ||
1044 | msg.msg_control = optval; | |
1045 | msg.msg_controllen = len; | |
98e77438 | 1046 | msg.msg_flags = flags; |
1da177e4 LT |
1047 | |
1048 | lock_sock(sk); | |
1049 | skb = np->pktoptions; | |
1050 | if (skb) | |
4b261c75 | 1051 | ip6_datagram_recv_ctl(sk, &msg, skb); |
1dc7b90f ED |
1052 | release_sock(sk); |
1053 | if (!skb) { | |
1da177e4 LT |
1054 | if (np->rxopt.bits.rxinfo) { |
1055 | struct in6_pktinfo src_info; | |
f250dcda YH |
1056 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
1057 | np->sticky_pktinfo.ipi6_ifindex; | |
efe4208f | 1058 | src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : np->sticky_pktinfo.ipi6_addr; |
1da177e4 LT |
1059 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); |
1060 | } | |
1061 | if (np->rxopt.bits.rxhlim) { | |
1062 | int hlim = np->mcast_hops; | |
1063 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
1064 | } | |
4c507d28 | 1065 | if (np->rxopt.bits.rxtclass) { |
d76ed22b LR |
1066 | int tclass = (int)ip6_tclass(np->rcv_flowinfo); |
1067 | ||
4c507d28 JB |
1068 | put_cmsg(&msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass); |
1069 | } | |
333fad53 YH |
1070 | if (np->rxopt.bits.rxoinfo) { |
1071 | struct in6_pktinfo src_info; | |
f250dcda YH |
1072 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
1073 | np->sticky_pktinfo.ipi6_ifindex; | |
efe4208f ED |
1074 | src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : |
1075 | np->sticky_pktinfo.ipi6_addr; | |
333fad53 YH |
1076 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); |
1077 | } | |
1078 | if (np->rxopt.bits.rxohlim) { | |
1079 | int hlim = np->mcast_hops; | |
1080 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
1081 | } | |
1397ed35 | 1082 | if (np->rxopt.bits.rxflow) { |
68536053 FF |
1083 | __be32 flowinfo = np->rcv_flowinfo; |
1084 | ||
1397ed35 FF |
1085 | put_cmsg(&msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo); |
1086 | } | |
1da177e4 LT |
1087 | } |
1088 | len -= msg.msg_controllen; | |
1089 | return put_user(len, optlen); | |
1090 | } | |
1091 | case IPV6_MTU: | |
1092 | { | |
1093 | struct dst_entry *dst; | |
b6c6712a | 1094 | |
1ab1457c | 1095 | val = 0; |
b6c6712a ED |
1096 | rcu_read_lock(); |
1097 | dst = __sk_dst_get(sk); | |
1098 | if (dst) | |
1da177e4 | 1099 | val = dst_mtu(dst); |
b6c6712a | 1100 | rcu_read_unlock(); |
1da177e4 LT |
1101 | if (!val) |
1102 | return -ENOTCONN; | |
1103 | break; | |
1104 | } | |
1105 | ||
1106 | case IPV6_V6ONLY: | |
9fe516ba | 1107 | val = sk->sk_ipv6only; |
1da177e4 LT |
1108 | break; |
1109 | ||
333fad53 | 1110 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
1111 | val = np->rxopt.bits.rxinfo; |
1112 | break; | |
1113 | ||
333fad53 YH |
1114 | case IPV6_2292PKTINFO: |
1115 | val = np->rxopt.bits.rxoinfo; | |
1116 | break; | |
1117 | ||
1118 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
1119 | val = np->rxopt.bits.rxhlim; |
1120 | break; | |
1121 | ||
333fad53 YH |
1122 | case IPV6_2292HOPLIMIT: |
1123 | val = np->rxopt.bits.rxohlim; | |
1124 | break; | |
1125 | ||
1126 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
1127 | val = np->rxopt.bits.srcrt; |
1128 | break; | |
1129 | ||
333fad53 YH |
1130 | case IPV6_2292RTHDR: |
1131 | val = np->rxopt.bits.osrcrt; | |
1132 | break; | |
1133 | ||
1da177e4 | 1134 | case IPV6_HOPOPTS: |
333fad53 YH |
1135 | case IPV6_RTHDRDSTOPTS: |
1136 | case IPV6_RTHDR: | |
1137 | case IPV6_DSTOPTS: | |
1138 | { | |
45f6fad8 | 1139 | struct ipv6_txoptions *opt; |
333fad53 YH |
1140 | |
1141 | lock_sock(sk); | |
1e1d04e6 HFS |
1142 | opt = rcu_dereference_protected(np->opt, |
1143 | lockdep_sock_is_held(sk)); | |
45f6fad8 | 1144 | len = ipv6_getsockopt_sticky(sk, opt, optname, optval, len); |
333fad53 | 1145 | release_sock(sk); |
05335c22 YH |
1146 | /* check if ipv6_getsockopt_sticky() returns err code */ |
1147 | if (len < 0) | |
1148 | return len; | |
333fad53 YH |
1149 | return put_user(len, optlen); |
1150 | } | |
1151 | ||
1152 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
1153 | val = np->rxopt.bits.hopopts; |
1154 | break; | |
1155 | ||
333fad53 YH |
1156 | case IPV6_2292HOPOPTS: |
1157 | val = np->rxopt.bits.ohopopts; | |
1158 | break; | |
1159 | ||
1160 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
1161 | val = np->rxopt.bits.dstopts; |
1162 | break; | |
1163 | ||
333fad53 YH |
1164 | case IPV6_2292DSTOPTS: |
1165 | val = np->rxopt.bits.odstopts; | |
1166 | break; | |
1167 | ||
41a1f8ea YH |
1168 | case IPV6_TCLASS: |
1169 | val = np->tclass; | |
1170 | break; | |
1171 | ||
1172 | case IPV6_RECVTCLASS: | |
1173 | val = np->rxopt.bits.rxtclass; | |
1174 | break; | |
1175 | ||
1da177e4 LT |
1176 | case IPV6_FLOWINFO: |
1177 | val = np->rxopt.bits.rxflow; | |
1178 | break; | |
1179 | ||
793b1473 BH |
1180 | case IPV6_RECVPATHMTU: |
1181 | val = np->rxopt.bits.rxpmtu; | |
1182 | break; | |
1183 | ||
1184 | case IPV6_PATHMTU: | |
1185 | { | |
1186 | struct dst_entry *dst; | |
1187 | struct ip6_mtuinfo mtuinfo; | |
1188 | ||
1189 | if (len < sizeof(mtuinfo)) | |
1190 | return -EINVAL; | |
1191 | ||
1192 | len = sizeof(mtuinfo); | |
1193 | memset(&mtuinfo, 0, sizeof(mtuinfo)); | |
1194 | ||
1195 | rcu_read_lock(); | |
1196 | dst = __sk_dst_get(sk); | |
1197 | if (dst) | |
1198 | mtuinfo.ip6m_mtu = dst_mtu(dst); | |
1199 | rcu_read_unlock(); | |
1200 | if (!mtuinfo.ip6m_mtu) | |
1201 | return -ENOTCONN; | |
1202 | ||
1203 | if (put_user(len, optlen)) | |
1204 | return -EFAULT; | |
1205 | if (copy_to_user(optval, &mtuinfo, len)) | |
1206 | return -EFAULT; | |
1207 | ||
1208 | return 0; | |
793b1473 BH |
1209 | } |
1210 | ||
6c468622 BS |
1211 | case IPV6_TRANSPARENT: |
1212 | val = inet_sk(sk)->transparent; | |
1213 | break; | |
1214 | ||
1215 | case IPV6_RECVORIGDSTADDR: | |
1216 | val = np->rxopt.bits.rxorigdstaddr; | |
1217 | break; | |
1218 | ||
1da177e4 | 1219 | case IPV6_UNICAST_HOPS: |
1da177e4 | 1220 | case IPV6_MULTICAST_HOPS: |
befffe90 BH |
1221 | { |
1222 | struct dst_entry *dst; | |
1223 | ||
1224 | if (optname == IPV6_UNICAST_HOPS) | |
1225 | val = np->hop_limit; | |
1226 | else | |
1227 | val = np->mcast_hops; | |
1228 | ||
b6c6712a ED |
1229 | if (val < 0) { |
1230 | rcu_read_lock(); | |
1231 | dst = __sk_dst_get(sk); | |
1232 | if (dst) | |
6b75d090 | 1233 | val = ip6_dst_hoplimit(dst); |
b6c6712a | 1234 | rcu_read_unlock(); |
befffe90 | 1235 | } |
b6c6712a | 1236 | |
befffe90 | 1237 | if (val < 0) |
53b7997f | 1238 | val = sock_net(sk)->ipv6.devconf_all->hop_limit; |
1da177e4 | 1239 | break; |
befffe90 | 1240 | } |
1da177e4 LT |
1241 | |
1242 | case IPV6_MULTICAST_LOOP: | |
1243 | val = np->mc_loop; | |
1244 | break; | |
1245 | ||
1246 | case IPV6_MULTICAST_IF: | |
1247 | val = np->mcast_oif; | |
1248 | break; | |
1249 | ||
c4062dfc EH |
1250 | case IPV6_UNICAST_IF: |
1251 | val = (__force int)htonl((__u32) np->ucast_oif); | |
1252 | break; | |
1253 | ||
1da177e4 LT |
1254 | case IPV6_MTU_DISCOVER: |
1255 | val = np->pmtudisc; | |
1256 | break; | |
1257 | ||
1258 | case IPV6_RECVERR: | |
1259 | val = np->recverr; | |
1260 | break; | |
1261 | ||
1262 | case IPV6_FLOWINFO_SEND: | |
1263 | val = np->sndflow; | |
1264 | break; | |
1265 | ||
3fdfa5ff FF |
1266 | case IPV6_FLOWLABEL_MGR: |
1267 | { | |
1268 | struct in6_flowlabel_req freq; | |
46e5f401 | 1269 | int flags; |
3fdfa5ff FF |
1270 | |
1271 | if (len < sizeof(freq)) | |
1272 | return -EINVAL; | |
1273 | ||
1274 | if (copy_from_user(&freq, optval, sizeof(freq))) | |
1275 | return -EFAULT; | |
1276 | ||
1277 | if (freq.flr_action != IPV6_FL_A_GET) | |
1278 | return -EINVAL; | |
1279 | ||
1280 | len = sizeof(freq); | |
46e5f401 FF |
1281 | flags = freq.flr_flags; |
1282 | ||
3fdfa5ff FF |
1283 | memset(&freq, 0, sizeof(freq)); |
1284 | ||
46e5f401 | 1285 | val = ipv6_flowlabel_opt_get(sk, &freq, flags); |
3fdfa5ff FF |
1286 | if (val < 0) |
1287 | return val; | |
1288 | ||
1289 | if (put_user(len, optlen)) | |
1290 | return -EFAULT; | |
1291 | if (copy_to_user(optval, &freq, len)) | |
1292 | return -EFAULT; | |
1293 | ||
1294 | return 0; | |
1295 | } | |
1296 | ||
7cbca67c YH |
1297 | case IPV6_ADDR_PREFERENCES: |
1298 | val = 0; | |
1299 | ||
1300 | if (np->srcprefs & IPV6_PREFER_SRC_TMP) | |
1301 | val |= IPV6_PREFER_SRC_TMP; | |
1302 | else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) | |
1303 | val |= IPV6_PREFER_SRC_PUBLIC; | |
1304 | else { | |
1305 | /* XXX: should we return system default? */ | |
1306 | val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; | |
1307 | } | |
1308 | ||
1309 | if (np->srcprefs & IPV6_PREFER_SRC_COA) | |
1310 | val |= IPV6_PREFER_SRC_COA; | |
1311 | else | |
1312 | val |= IPV6_PREFER_SRC_HOME; | |
1313 | break; | |
e802af9c SH |
1314 | |
1315 | case IPV6_MINHOPCOUNT: | |
1316 | val = np->min_hopcount; | |
1317 | break; | |
793b1473 BH |
1318 | |
1319 | case IPV6_DONTFRAG: | |
1320 | val = np->dontfrag; | |
1321 | break; | |
7cbca67c | 1322 | |
cb1ce2ef TH |
1323 | case IPV6_AUTOFLOWLABEL: |
1324 | val = np->autoflowlabel; | |
1325 | break; | |
1326 | ||
0cc0aa61 WB |
1327 | case IPV6_RECVFRAGSIZE: |
1328 | val = np->rxopt.bits.recvfragsize; | |
1329 | break; | |
1330 | ||
1da177e4 | 1331 | default: |
cf6fc4a9 | 1332 | return -ENOPROTOOPT; |
1da177e4 LT |
1333 | } |
1334 | len = min_t(unsigned int, sizeof(int), len); | |
67ba4152 | 1335 | if (put_user(len, optlen)) |
1da177e4 | 1336 | return -EFAULT; |
67ba4152 | 1337 | if (copy_to_user(optval, &val, len)) |
1da177e4 LT |
1338 | return -EFAULT; |
1339 | return 0; | |
1340 | } | |
1341 | ||
3fdadf7d DM |
1342 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1343 | char __user *optval, int __user *optlen) | |
1344 | { | |
1345 | int err; | |
1346 | ||
1347 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
1348 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
1349 | ||
67ba4152 | 1350 | if (level != SOL_IPV6) |
3fdadf7d DM |
1351 | return -ENOPROTOOPT; |
1352 | ||
98e77438 | 1353 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 0); |
3fdadf7d | 1354 | #ifdef CONFIG_NETFILTER |
cf6fc4a9 WY |
1355 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1356 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1357 | int len; |
1358 | ||
1359 | if (get_user(len, optlen)) | |
1360 | return -EFAULT; | |
1361 | ||
1362 | lock_sock(sk); | |
1363 | err = nf_getsockopt(sk, PF_INET6, optname, optval, | |
1364 | &len); | |
1365 | release_sock(sk); | |
1366 | if (err >= 0) | |
1367 | err = put_user(len, optlen); | |
1368 | } | |
1369 | #endif | |
1370 | return err; | |
1371 | } | |
7159039a YH |
1372 | EXPORT_SYMBOL(ipv6_getsockopt); |
1373 | ||
3fdadf7d DM |
1374 | #ifdef CONFIG_COMPAT |
1375 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1376 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
1377 | { |
1378 | int err; | |
1379 | ||
1380 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
1381 | if (udp_prot.compat_getsockopt != NULL) |
1382 | return udp_prot.compat_getsockopt(sk, level, optname, | |
1383 | optval, optlen); | |
1384 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
1385 | } |
1386 | ||
543d9cfe | 1387 | if (level != SOL_IPV6) |
3fdadf7d DM |
1388 | return -ENOPROTOOPT; |
1389 | ||
80991790 PE |
1390 | if (optname == MCAST_MSFILTER) |
1391 | return compat_mc_getsockopt(sk, level, optname, optval, optlen, | |
1392 | ipv6_getsockopt); | |
1393 | ||
98e77438 DB |
1394 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, |
1395 | MSG_CMSG_COMPAT); | |
3fdadf7d | 1396 | #ifdef CONFIG_NETFILTER |
cf6fc4a9 WY |
1397 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1398 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1399 | int len; |
1400 | ||
1401 | if (get_user(len, optlen)) | |
1402 | return -EFAULT; | |
1403 | ||
1404 | lock_sock(sk); | |
543d9cfe ACM |
1405 | err = compat_nf_getsockopt(sk, PF_INET6, |
1406 | optname, optval, &len); | |
3fdadf7d DM |
1407 | release_sock(sk); |
1408 | if (err >= 0) | |
1409 | err = put_user(len, optlen); | |
1410 | } | |
1411 | #endif | |
1412 | return err; | |
1413 | } | |
543d9cfe | 1414 | EXPORT_SYMBOL(compat_ipv6_getsockopt); |
3fdadf7d DM |
1415 | #endif |
1416 |