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 | } | |
88 | if (new_ra == NULL) { | |
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 | ||
3fdadf7d | 120 | static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 121 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
122 | { |
123 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 124 | struct net *net = sock_net(sk); |
1da177e4 LT |
125 | int val, valbool; |
126 | int retv = -ENOPROTOOPT; | |
127 | ||
1da177e4 | 128 | if (optval == NULL) |
67ba4152 | 129 | val = 0; |
b2a9d7c2 YH |
130 | else { |
131 | if (optlen >= sizeof(int)) { | |
132 | if (get_user(val, (int __user *) optval)) | |
133 | return -EFAULT; | |
134 | } else | |
135 | val = 0; | |
136 | } | |
1da177e4 | 137 | |
67ba4152 | 138 | valbool = (val != 0); |
1da177e4 | 139 | |
7bc570c8 YH |
140 | if (ip6_mroute_opt(optname)) |
141 | return ip6_mroute_setsockopt(sk, optname, optval, optlen); | |
142 | ||
1da177e4 LT |
143 | lock_sock(sk); |
144 | ||
145 | switch (optname) { | |
146 | ||
147 | case IPV6_ADDRFORM: | |
b2a9d7c2 YH |
148 | if (optlen < sizeof(int)) |
149 | goto e_inval; | |
1da177e4 LT |
150 | if (val == PF_INET) { |
151 | struct ipv6_txoptions *opt; | |
152 | struct sk_buff *pktopt; | |
153 | ||
49d074f4 DL |
154 | if (sk->sk_type == SOCK_RAW) |
155 | break; | |
156 | ||
9596cc82 DL |
157 | if (sk->sk_protocol == IPPROTO_UDP || |
158 | sk->sk_protocol == IPPROTO_UDPLITE) { | |
159 | struct udp_sock *up = udp_sk(sk); | |
160 | if (up->pending == AF_INET6) { | |
161 | retv = -EBUSY; | |
162 | break; | |
163 | } | |
164 | } else if (sk->sk_protocol != IPPROTO_TCP) | |
1da177e4 LT |
165 | break; |
166 | ||
167 | if (sk->sk_state != TCP_ESTABLISHED) { | |
168 | retv = -ENOTCONN; | |
169 | break; | |
170 | } | |
171 | ||
172 | if (ipv6_only_sock(sk) || | |
efe4208f | 173 | !ipv6_addr_v4mapped(&sk->sk_v6_daddr)) { |
1da177e4 LT |
174 | retv = -EADDRNOTAVAIL; |
175 | break; | |
176 | } | |
177 | ||
178 | fl6_free_socklist(sk); | |
179 | ipv6_sock_mc_close(sk); | |
180 | ||
e6848976 ACM |
181 | /* |
182 | * Sock is moving from IPv6 to IPv4 (sk_prot), so | |
183 | * remove it from the refcnt debug socks count in the | |
184 | * original family... | |
185 | */ | |
186 | sk_refcnt_debug_dec(sk); | |
187 | ||
1da177e4 | 188 | if (sk->sk_protocol == IPPROTO_TCP) { |
d83d8461 | 189 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 | 190 | local_bh_disable(); |
c29a0bc4 PE |
191 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
192 | sock_prot_inuse_add(net, &tcp_prot, 1); | |
1da177e4 LT |
193 | local_bh_enable(); |
194 | sk->sk_prot = &tcp_prot; | |
d83d8461 | 195 | icsk->icsk_af_ops = &ipv4_specific; |
1da177e4 LT |
196 | sk->sk_socket->ops = &inet_stream_ops; |
197 | sk->sk_family = PF_INET; | |
d83d8461 | 198 | tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); |
1da177e4 | 199 | } else { |
ba4e58ec GR |
200 | struct proto *prot = &udp_prot; |
201 | ||
db8dac20 | 202 | if (sk->sk_protocol == IPPROTO_UDPLITE) |
ba4e58ec | 203 | prot = &udplite_prot; |
1da177e4 | 204 | local_bh_disable(); |
c29a0bc4 PE |
205 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
206 | sock_prot_inuse_add(net, prot, 1); | |
1da177e4 | 207 | local_bh_enable(); |
ba4e58ec | 208 | sk->sk_prot = prot; |
1da177e4 LT |
209 | sk->sk_socket->ops = &inet_dgram_ops; |
210 | sk->sk_family = PF_INET; | |
211 | } | |
212 | opt = xchg(&np->opt, NULL); | |
213 | if (opt) | |
214 | sock_kfree_s(sk, opt, opt->tot_len); | |
215 | pktopt = xchg(&np->pktoptions, NULL); | |
800d55f1 | 216 | kfree_skb(pktopt); |
1da177e4 LT |
217 | |
218 | sk->sk_destruct = inet_sock_destruct; | |
e6848976 ACM |
219 | /* |
220 | * ... and add it to the refcnt debug socks count | |
221 | * in the new family. -acme | |
222 | */ | |
223 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
224 | module_put(THIS_MODULE); |
225 | retv = 0; | |
226 | break; | |
227 | } | |
228 | goto e_inval; | |
229 | ||
230 | case IPV6_V6ONLY: | |
b2a9d7c2 | 231 | if (optlen < sizeof(int) || |
c720c7e8 | 232 | inet_sk(sk)->inet_num) |
1da177e4 | 233 | goto e_inval; |
9fe516ba | 234 | sk->sk_ipv6only = valbool; |
1da177e4 LT |
235 | retv = 0; |
236 | break; | |
237 | ||
333fad53 | 238 | case IPV6_RECVPKTINFO: |
b2a9d7c2 YH |
239 | if (optlen < sizeof(int)) |
240 | goto e_inval; | |
1da177e4 LT |
241 | np->rxopt.bits.rxinfo = valbool; |
242 | retv = 0; | |
243 | break; | |
1ab1457c | 244 | |
333fad53 | 245 | case IPV6_2292PKTINFO: |
b2a9d7c2 YH |
246 | if (optlen < sizeof(int)) |
247 | goto e_inval; | |
333fad53 YH |
248 | np->rxopt.bits.rxoinfo = valbool; |
249 | retv = 0; | |
250 | break; | |
1da177e4 | 251 | |
333fad53 | 252 | case IPV6_RECVHOPLIMIT: |
b2a9d7c2 YH |
253 | if (optlen < sizeof(int)) |
254 | goto e_inval; | |
1da177e4 LT |
255 | np->rxopt.bits.rxhlim = valbool; |
256 | retv = 0; | |
257 | break; | |
258 | ||
333fad53 | 259 | case IPV6_2292HOPLIMIT: |
b2a9d7c2 YH |
260 | if (optlen < sizeof(int)) |
261 | goto e_inval; | |
333fad53 YH |
262 | np->rxopt.bits.rxohlim = valbool; |
263 | retv = 0; | |
264 | break; | |
265 | ||
266 | case IPV6_RECVRTHDR: | |
b2a9d7c2 YH |
267 | if (optlen < sizeof(int)) |
268 | goto e_inval; | |
4c752098 | 269 | np->rxopt.bits.srcrt = valbool; |
1da177e4 LT |
270 | retv = 0; |
271 | break; | |
272 | ||
333fad53 | 273 | case IPV6_2292RTHDR: |
b2a9d7c2 YH |
274 | if (optlen < sizeof(int)) |
275 | goto e_inval; | |
4c752098 | 276 | np->rxopt.bits.osrcrt = valbool; |
333fad53 YH |
277 | retv = 0; |
278 | break; | |
279 | ||
280 | case IPV6_RECVHOPOPTS: | |
b2a9d7c2 YH |
281 | if (optlen < sizeof(int)) |
282 | goto e_inval; | |
1da177e4 LT |
283 | np->rxopt.bits.hopopts = valbool; |
284 | retv = 0; | |
285 | break; | |
286 | ||
333fad53 | 287 | case IPV6_2292HOPOPTS: |
b2a9d7c2 YH |
288 | if (optlen < sizeof(int)) |
289 | goto e_inval; | |
333fad53 YH |
290 | np->rxopt.bits.ohopopts = valbool; |
291 | retv = 0; | |
292 | break; | |
293 | ||
294 | case IPV6_RECVDSTOPTS: | |
b2a9d7c2 YH |
295 | if (optlen < sizeof(int)) |
296 | goto e_inval; | |
1da177e4 LT |
297 | np->rxopt.bits.dstopts = valbool; |
298 | retv = 0; | |
299 | break; | |
300 | ||
333fad53 | 301 | case IPV6_2292DSTOPTS: |
b2a9d7c2 YH |
302 | if (optlen < sizeof(int)) |
303 | goto e_inval; | |
333fad53 YH |
304 | np->rxopt.bits.odstopts = valbool; |
305 | retv = 0; | |
306 | break; | |
307 | ||
41a1f8ea | 308 | case IPV6_TCLASS: |
b2a9d7c2 YH |
309 | if (optlen < sizeof(int)) |
310 | goto e_inval; | |
d0ee011f | 311 | if (val < -1 || val > 0xff) |
41a1f8ea | 312 | goto e_inval; |
26ced1e4 GR |
313 | /* RFC 3542, 6.5: default traffic class of 0x0 */ |
314 | if (val == -1) | |
315 | val = 0; | |
41a1f8ea YH |
316 | np->tclass = val; |
317 | retv = 0; | |
318 | break; | |
1ab1457c | 319 | |
41a1f8ea | 320 | case IPV6_RECVTCLASS: |
b2a9d7c2 YH |
321 | if (optlen < sizeof(int)) |
322 | goto e_inval; | |
41a1f8ea YH |
323 | np->rxopt.bits.rxtclass = valbool; |
324 | retv = 0; | |
325 | break; | |
326 | ||
1da177e4 | 327 | case IPV6_FLOWINFO: |
b2a9d7c2 YH |
328 | if (optlen < sizeof(int)) |
329 | goto e_inval; | |
1da177e4 LT |
330 | np->rxopt.bits.rxflow = valbool; |
331 | retv = 0; | |
332 | break; | |
333 | ||
793b1473 BH |
334 | case IPV6_RECVPATHMTU: |
335 | if (optlen < sizeof(int)) | |
336 | goto e_inval; | |
337 | np->rxopt.bits.rxpmtu = valbool; | |
338 | retv = 0; | |
339 | break; | |
340 | ||
6c468622 | 341 | case IPV6_TRANSPARENT: |
af31f412 EB |
342 | if (valbool && !ns_capable(net->user_ns, CAP_NET_ADMIN) && |
343 | !ns_capable(net->user_ns, CAP_NET_RAW)) { | |
b889416b BS |
344 | retv = -EPERM; |
345 | break; | |
346 | } | |
6c468622 BS |
347 | if (optlen < sizeof(int)) |
348 | goto e_inval; | |
349 | /* we don't have a separate transparent bit for IPV6 we use the one in the IPv4 socket */ | |
350 | inet_sk(sk)->transparent = valbool; | |
351 | retv = 0; | |
352 | break; | |
353 | ||
354 | case IPV6_RECVORIGDSTADDR: | |
355 | if (optlen < sizeof(int)) | |
356 | goto e_inval; | |
357 | np->rxopt.bits.rxorigdstaddr = valbool; | |
358 | retv = 0; | |
359 | break; | |
360 | ||
333fad53 YH |
361 | case IPV6_HOPOPTS: |
362 | case IPV6_RTHDRDSTOPTS: | |
363 | case IPV6_RTHDR: | |
364 | case IPV6_DSTOPTS: | |
365 | { | |
366 | struct ipv6_txoptions *opt; | |
aea7427f SW |
367 | |
368 | /* remove any sticky options header with a zero option | |
369 | * length, per RFC3542. | |
370 | */ | |
333fad53 | 371 | if (optlen == 0) |
cb422c46 | 372 | optval = NULL; |
cfb266c0 YH |
373 | else if (optval == NULL) |
374 | goto e_inval; | |
aea7427f SW |
375 | else if (optlen < sizeof(struct ipv6_opt_hdr) || |
376 | optlen & 0x7 || optlen > 8 * 255) | |
377 | goto e_inval; | |
333fad53 YH |
378 | |
379 | /* hop-by-hop / destination options are privileged option */ | |
380 | retv = -EPERM; | |
af31f412 | 381 | if (optname != IPV6_RTHDR && !ns_capable(net->user_ns, CAP_NET_RAW)) |
333fad53 YH |
382 | break; |
383 | ||
333fad53 YH |
384 | opt = ipv6_renew_options(sk, np->opt, optname, |
385 | (struct ipv6_opt_hdr __user *)optval, | |
386 | optlen); | |
387 | if (IS_ERR(opt)) { | |
388 | retv = PTR_ERR(opt); | |
389 | break; | |
390 | } | |
391 | ||
392 | /* routing header option needs extra check */ | |
6e093d9d | 393 | retv = -EINVAL; |
dfee0a72 | 394 | if (optname == IPV6_RTHDR && opt && opt->srcrt) { |
333fad53 | 395 | struct ipv6_rt_hdr *rthdr = opt->srcrt; |
280a9d34 | 396 | switch (rthdr->type) { |
07a93626 | 397 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
280a9d34 | 398 | case IPV6_SRCRT_TYPE_2: |
6e093d9d BH |
399 | if (rthdr->hdrlen != 2 || |
400 | rthdr->segments_left != 1) | |
401 | goto sticky_done; | |
402 | ||
280a9d34 | 403 | break; |
bb4dbf9e | 404 | #endif |
280a9d34 | 405 | default: |
333fad53 | 406 | goto sticky_done; |
280a9d34 | 407 | } |
333fad53 YH |
408 | } |
409 | ||
410 | retv = 0; | |
e7712f1a | 411 | opt = ipv6_update_options(sk, opt); |
333fad53 YH |
412 | sticky_done: |
413 | if (opt) | |
414 | sock_kfree_s(sk, opt, opt->tot_len); | |
415 | break; | |
416 | } | |
417 | ||
b24a2516 YH |
418 | case IPV6_PKTINFO: |
419 | { | |
420 | struct in6_pktinfo pkt; | |
421 | ||
422 | if (optlen == 0) | |
423 | goto e_inval; | |
424 | else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL) | |
425 | goto e_inval; | |
426 | ||
914d1164 | 427 | if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) { |
b24a2516 YH |
428 | retv = -EFAULT; |
429 | break; | |
430 | } | |
431 | if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if) | |
432 | goto e_inval; | |
433 | ||
434 | np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex; | |
4e3fd7a0 | 435 | np->sticky_pktinfo.ipi6_addr = pkt.ipi6_addr; |
b24a2516 YH |
436 | retv = 0; |
437 | break; | |
438 | } | |
439 | ||
333fad53 | 440 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
441 | { |
442 | struct ipv6_txoptions *opt = NULL; | |
443 | struct msghdr msg; | |
4c9483b2 | 444 | struct flowi6 fl6; |
1da177e4 LT |
445 | int junk; |
446 | ||
4c9483b2 DM |
447 | memset(&fl6, 0, sizeof(fl6)); |
448 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
449 | fl6.flowi6_mark = sk->sk_mark; | |
1da177e4 LT |
450 | |
451 | if (optlen == 0) | |
452 | goto update; | |
453 | ||
454 | /* 1K is probably excessive | |
455 | * 1K is surely not enough, 2K per standard header is 16K. | |
456 | */ | |
457 | retv = -EINVAL; | |
458 | if (optlen > 64*1024) | |
459 | break; | |
460 | ||
461 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
462 | retv = -ENOBUFS; | |
463 | if (opt == NULL) | |
464 | break; | |
465 | ||
466 | memset(opt, 0, sizeof(*opt)); | |
467 | opt->tot_len = sizeof(*opt) + optlen; | |
468 | retv = -EFAULT; | |
469 | if (copy_from_user(opt+1, optval, optlen)) | |
470 | goto done; | |
471 | ||
472 | msg.msg_controllen = optlen; | |
67ba4152 | 473 | msg.msg_control = (void *)(opt+1); |
1da177e4 | 474 | |
73df66f8 TP |
475 | retv = ip6_datagram_send_ctl(net, sk, &msg, &fl6, opt, &junk, |
476 | &junk, &junk); | |
1da177e4 LT |
477 | if (retv) |
478 | goto done; | |
479 | update: | |
480 | retv = 0; | |
e7712f1a | 481 | opt = ipv6_update_options(sk, opt); |
1da177e4 LT |
482 | done: |
483 | if (opt) | |
484 | sock_kfree_s(sk, opt, opt->tot_len); | |
485 | break; | |
486 | } | |
487 | case IPV6_UNICAST_HOPS: | |
b2a9d7c2 YH |
488 | if (optlen < sizeof(int)) |
489 | goto e_inval; | |
1da177e4 LT |
490 | if (val > 255 || val < -1) |
491 | goto e_inval; | |
492 | np->hop_limit = val; | |
493 | retv = 0; | |
494 | break; | |
495 | ||
496 | case IPV6_MULTICAST_HOPS: | |
497 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 498 | break; |
b2a9d7c2 YH |
499 | if (optlen < sizeof(int)) |
500 | goto e_inval; | |
1da177e4 LT |
501 | if (val > 255 || val < -1) |
502 | goto e_inval; | |
2a38e6d5 | 503 | np->mcast_hops = (val == -1 ? IPV6_DEFAULT_MCASTHOPS : val); |
1da177e4 LT |
504 | retv = 0; |
505 | break; | |
506 | ||
507 | case IPV6_MULTICAST_LOOP: | |
b2a9d7c2 YH |
508 | if (optlen < sizeof(int)) |
509 | goto e_inval; | |
28d44882 YH |
510 | if (val != valbool) |
511 | goto e_inval; | |
1da177e4 LT |
512 | np->mc_loop = valbool; |
513 | retv = 0; | |
514 | break; | |
515 | ||
c4062dfc EH |
516 | case IPV6_UNICAST_IF: |
517 | { | |
518 | struct net_device *dev = NULL; | |
519 | int ifindex; | |
520 | ||
521 | if (optlen != sizeof(int)) | |
522 | goto e_inval; | |
523 | ||
524 | ifindex = (__force int)ntohl((__force __be32)val); | |
525 | if (ifindex == 0) { | |
526 | np->ucast_oif = 0; | |
527 | retv = 0; | |
528 | break; | |
529 | } | |
530 | ||
531 | dev = dev_get_by_index(net, ifindex); | |
532 | retv = -EADDRNOTAVAIL; | |
533 | if (!dev) | |
534 | break; | |
535 | dev_put(dev); | |
536 | ||
537 | retv = -EINVAL; | |
538 | if (sk->sk_bound_dev_if) | |
539 | break; | |
540 | ||
541 | np->ucast_oif = ifindex; | |
542 | retv = 0; | |
543 | break; | |
544 | } | |
545 | ||
1da177e4 LT |
546 | case IPV6_MULTICAST_IF: |
547 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 548 | break; |
b2a9d7c2 YH |
549 | if (optlen < sizeof(int)) |
550 | goto e_inval; | |
1da177e4 | 551 | |
4953f0fc | 552 | if (val) { |
55b80503 ED |
553 | struct net_device *dev; |
554 | ||
4953f0fc BH |
555 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) |
556 | goto e_inval; | |
557 | ||
55b80503 ED |
558 | dev = dev_get_by_index(net, val); |
559 | if (!dev) { | |
4953f0fc BH |
560 | retv = -ENODEV; |
561 | break; | |
562 | } | |
55b80503 | 563 | dev_put(dev); |
1da177e4 LT |
564 | } |
565 | np->mcast_oif = val; | |
566 | retv = 0; | |
567 | break; | |
568 | case IPV6_ADD_MEMBERSHIP: | |
569 | case IPV6_DROP_MEMBERSHIP: | |
570 | { | |
571 | struct ipv6_mreq mreq; | |
572 | ||
a28398ba WC |
573 | if (optlen < sizeof(struct ipv6_mreq)) |
574 | goto e_inval; | |
575 | ||
a96fb49b FL |
576 | retv = -EPROTO; |
577 | if (inet_sk(sk)->is_icsk) | |
578 | break; | |
579 | ||
1da177e4 LT |
580 | retv = -EFAULT; |
581 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
582 | break; | |
583 | ||
584 | if (optname == IPV6_ADD_MEMBERSHIP) | |
585 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
586 | else | |
587 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
588 | break; | |
589 | } | |
590 | case IPV6_JOIN_ANYCAST: | |
591 | case IPV6_LEAVE_ANYCAST: | |
592 | { | |
593 | struct ipv6_mreq mreq; | |
594 | ||
a28398ba | 595 | if (optlen < sizeof(struct ipv6_mreq)) |
1da177e4 LT |
596 | goto e_inval; |
597 | ||
598 | retv = -EFAULT; | |
599 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
600 | break; | |
601 | ||
602 | if (optname == IPV6_JOIN_ANYCAST) | |
603 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
604 | else | |
605 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
606 | break; | |
607 | } | |
608 | case MCAST_JOIN_GROUP: | |
609 | case MCAST_LEAVE_GROUP: | |
610 | { | |
611 | struct group_req greq; | |
612 | struct sockaddr_in6 *psin6; | |
613 | ||
a28398ba WC |
614 | if (optlen < sizeof(struct group_req)) |
615 | goto e_inval; | |
616 | ||
1da177e4 LT |
617 | retv = -EFAULT; |
618 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
619 | break; | |
620 | if (greq.gr_group.ss_family != AF_INET6) { | |
621 | retv = -EADDRNOTAVAIL; | |
622 | break; | |
623 | } | |
624 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
625 | if (optname == MCAST_JOIN_GROUP) | |
626 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, | |
627 | &psin6->sin6_addr); | |
628 | else | |
629 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, | |
630 | &psin6->sin6_addr); | |
631 | break; | |
632 | } | |
633 | case MCAST_JOIN_SOURCE_GROUP: | |
634 | case MCAST_LEAVE_SOURCE_GROUP: | |
635 | case MCAST_BLOCK_SOURCE: | |
636 | case MCAST_UNBLOCK_SOURCE: | |
637 | { | |
638 | struct group_source_req greqs; | |
639 | int omode, add; | |
640 | ||
a28398ba | 641 | if (optlen < sizeof(struct group_source_req)) |
1da177e4 LT |
642 | goto e_inval; |
643 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
644 | retv = -EFAULT; | |
645 | break; | |
646 | } | |
647 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
648 | greqs.gsr_source.ss_family != AF_INET6) { | |
649 | retv = -EADDRNOTAVAIL; | |
650 | break; | |
651 | } | |
652 | if (optname == MCAST_BLOCK_SOURCE) { | |
653 | omode = MCAST_EXCLUDE; | |
654 | add = 1; | |
655 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
656 | omode = MCAST_EXCLUDE; | |
657 | add = 0; | |
658 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
659 | struct sockaddr_in6 *psin6; | |
660 | ||
661 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
662 | retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, | |
663 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
664 | /* prior join w/ different source is ok */ |
665 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
666 | break; |
667 | omode = MCAST_INCLUDE; | |
668 | add = 1; | |
c9e3e8b6 | 669 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
670 | omode = MCAST_INCLUDE; |
671 | add = 0; | |
672 | } | |
673 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
674 | break; | |
675 | } | |
676 | case MCAST_MSFILTER: | |
677 | { | |
1da177e4 LT |
678 | struct group_filter *gsf; |
679 | ||
680 | if (optlen < GROUP_FILTER_SIZE(0)) | |
681 | goto e_inval; | |
682 | if (optlen > sysctl_optmem_max) { | |
683 | retv = -ENOBUFS; | |
684 | break; | |
685 | } | |
67ba4152 | 686 | gsf = kmalloc(optlen, GFP_KERNEL); |
cfcabdcc | 687 | if (!gsf) { |
1da177e4 LT |
688 | retv = -ENOBUFS; |
689 | break; | |
690 | } | |
691 | retv = -EFAULT; | |
692 | if (copy_from_user(gsf, optval, optlen)) { | |
693 | kfree(gsf); | |
694 | break; | |
695 | } | |
696 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
697 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
698 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
699 | kfree(gsf); | |
700 | retv = -ENOBUFS; | |
701 | break; | |
702 | } | |
703 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
704 | kfree(gsf); | |
705 | retv = -EINVAL; | |
706 | break; | |
707 | } | |
708 | retv = ip6_mc_msfilter(sk, gsf); | |
709 | kfree(gsf); | |
710 | ||
711 | break; | |
712 | } | |
713 | case IPV6_ROUTER_ALERT: | |
b2a9d7c2 YH |
714 | if (optlen < sizeof(int)) |
715 | goto e_inval; | |
725a8ff0 | 716 | retv = ip6_ra_control(sk, val); |
1da177e4 LT |
717 | break; |
718 | case IPV6_MTU_DISCOVER: | |
b2a9d7c2 YH |
719 | if (optlen < sizeof(int)) |
720 | goto e_inval; | |
0b95227a | 721 | if (val < IPV6_PMTUDISC_DONT || val > IPV6_PMTUDISC_OMIT) |
1da177e4 LT |
722 | goto e_inval; |
723 | np->pmtudisc = val; | |
724 | retv = 0; | |
725 | break; | |
726 | case IPV6_MTU: | |
b2a9d7c2 YH |
727 | if (optlen < sizeof(int)) |
728 | goto e_inval; | |
1da177e4 LT |
729 | if (val && val < IPV6_MIN_MTU) |
730 | goto e_inval; | |
731 | np->frag_size = val; | |
732 | retv = 0; | |
733 | break; | |
734 | case IPV6_RECVERR: | |
b2a9d7c2 YH |
735 | if (optlen < sizeof(int)) |
736 | goto e_inval; | |
1da177e4 LT |
737 | np->recverr = valbool; |
738 | if (!val) | |
739 | skb_queue_purge(&sk->sk_error_queue); | |
740 | retv = 0; | |
741 | break; | |
742 | case IPV6_FLOWINFO_SEND: | |
b2a9d7c2 YH |
743 | if (optlen < sizeof(int)) |
744 | goto e_inval; | |
1da177e4 LT |
745 | np->sndflow = valbool; |
746 | retv = 0; | |
747 | break; | |
748 | case IPV6_FLOWLABEL_MGR: | |
749 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
750 | break; | |
751 | case IPV6_IPSEC_POLICY: | |
752 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 | 753 | retv = -EPERM; |
af31f412 | 754 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
6fc0b4a7 | 755 | break; |
1da177e4 LT |
756 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
757 | break; | |
758 | ||
7cbca67c YH |
759 | case IPV6_ADDR_PREFERENCES: |
760 | { | |
761 | unsigned int pref = 0; | |
762 | unsigned int prefmask = ~0; | |
763 | ||
b2a9d7c2 YH |
764 | if (optlen < sizeof(int)) |
765 | goto e_inval; | |
766 | ||
7cbca67c YH |
767 | retv = -EINVAL; |
768 | ||
769 | /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ | |
770 | switch (val & (IPV6_PREFER_SRC_PUBLIC| | |
771 | IPV6_PREFER_SRC_TMP| | |
772 | IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { | |
773 | case IPV6_PREFER_SRC_PUBLIC: | |
774 | pref |= IPV6_PREFER_SRC_PUBLIC; | |
775 | break; | |
776 | case IPV6_PREFER_SRC_TMP: | |
777 | pref |= IPV6_PREFER_SRC_TMP; | |
778 | break; | |
779 | case IPV6_PREFER_SRC_PUBTMP_DEFAULT: | |
780 | break; | |
781 | case 0: | |
782 | goto pref_skip_pubtmp; | |
783 | default: | |
784 | goto e_inval; | |
785 | } | |
786 | ||
787 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| | |
788 | IPV6_PREFER_SRC_TMP); | |
789 | pref_skip_pubtmp: | |
790 | ||
791 | /* check HOME/COA conflicts */ | |
792 | switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { | |
793 | case IPV6_PREFER_SRC_HOME: | |
794 | break; | |
795 | case IPV6_PREFER_SRC_COA: | |
796 | pref |= IPV6_PREFER_SRC_COA; | |
797 | case 0: | |
798 | goto pref_skip_coa; | |
799 | default: | |
800 | goto e_inval; | |
801 | } | |
802 | ||
803 | prefmask &= ~IPV6_PREFER_SRC_COA; | |
804 | pref_skip_coa: | |
805 | ||
806 | /* check CGA/NONCGA conflicts */ | |
807 | switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { | |
808 | case IPV6_PREFER_SRC_CGA: | |
809 | case IPV6_PREFER_SRC_NONCGA: | |
810 | case 0: | |
811 | break; | |
812 | default: | |
813 | goto e_inval; | |
814 | } | |
815 | ||
816 | np->srcprefs = (np->srcprefs & prefmask) | pref; | |
817 | retv = 0; | |
818 | ||
819 | break; | |
820 | } | |
e802af9c SH |
821 | case IPV6_MINHOPCOUNT: |
822 | if (optlen < sizeof(int)) | |
823 | goto e_inval; | |
824 | if (val < 0 || val > 255) | |
825 | goto e_inval; | |
826 | np->min_hopcount = val; | |
d4596bad | 827 | retv = 0; |
793b1473 BH |
828 | break; |
829 | case IPV6_DONTFRAG: | |
830 | np->dontfrag = valbool; | |
e802af9c SH |
831 | retv = 0; |
832 | break; | |
cb1ce2ef TH |
833 | case IPV6_AUTOFLOWLABEL: |
834 | np->autoflowlabel = valbool; | |
835 | retv = 0; | |
836 | break; | |
1da177e4 | 837 | } |
7cbca67c | 838 | |
1da177e4 LT |
839 | release_sock(sk); |
840 | ||
1da177e4 LT |
841 | return retv; |
842 | ||
843 | e_inval: | |
844 | release_sock(sk); | |
845 | return -EINVAL; | |
846 | } | |
847 | ||
3fdadf7d | 848 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 849 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
850 | { |
851 | int err; | |
852 | ||
853 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
854 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
855 | ||
856 | if (level != SOL_IPV6) | |
857 | return -ENOPROTOOPT; | |
858 | ||
859 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
860 | #ifdef CONFIG_NETFILTER | |
861 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
862 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
863 | optname != IPV6_XFRM_POLICY) { | |
864 | lock_sock(sk); | |
865 | err = nf_setsockopt(sk, PF_INET6, optname, optval, | |
866 | optlen); | |
867 | release_sock(sk); | |
868 | } | |
869 | #endif | |
870 | return err; | |
871 | } | |
7159039a | 872 | EXPORT_SYMBOL(ipv6_setsockopt); |
3fdadf7d DM |
873 | |
874 | #ifdef CONFIG_COMPAT | |
875 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
b7058842 | 876 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
877 | { |
878 | int err; | |
879 | ||
880 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
881 | if (udp_prot.compat_setsockopt != NULL) |
882 | return udp_prot.compat_setsockopt(sk, level, optname, | |
883 | optval, optlen); | |
884 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
885 | } |
886 | ||
887 | if (level != SOL_IPV6) | |
888 | return -ENOPROTOOPT; | |
889 | ||
dae50295 DS |
890 | if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) |
891 | return compat_mc_setsockopt(sk, level, optname, optval, optlen, | |
892 | ipv6_setsockopt); | |
893 | ||
3fdadf7d DM |
894 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); |
895 | #ifdef CONFIG_NETFILTER | |
896 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
897 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
543d9cfe | 898 | optname != IPV6_XFRM_POLICY) { |
3fdadf7d | 899 | lock_sock(sk); |
543d9cfe ACM |
900 | err = compat_nf_setsockopt(sk, PF_INET6, optname, |
901 | optval, optlen); | |
3fdadf7d DM |
902 | release_sock(sk); |
903 | } | |
904 | #endif | |
905 | return err; | |
906 | } | |
543d9cfe | 907 | EXPORT_SYMBOL(compat_ipv6_setsockopt); |
3fdadf7d DM |
908 | #endif |
909 | ||
28693079 | 910 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, |
4c6510a7 | 911 | int optname, char __user *optval, int len) |
333fad53 | 912 | { |
28693079 DM |
913 | struct ipv6_opt_hdr *hdr; |
914 | ||
4c6510a7 YH |
915 | if (!opt) |
916 | return 0; | |
917 | ||
67ba4152 | 918 | switch (optname) { |
4c6510a7 YH |
919 | case IPV6_HOPOPTS: |
920 | hdr = opt->hopopt; | |
921 | break; | |
922 | case IPV6_RTHDRDSTOPTS: | |
923 | hdr = opt->dst0opt; | |
924 | break; | |
925 | case IPV6_RTHDR: | |
926 | hdr = (struct ipv6_opt_hdr *)opt->srcrt; | |
927 | break; | |
928 | case IPV6_DSTOPTS: | |
929 | hdr = opt->dst1opt; | |
930 | break; | |
931 | default: | |
932 | return -EINVAL; /* should not happen */ | |
933 | } | |
934 | ||
935 | if (!hdr) | |
333fad53 | 936 | return 0; |
28693079 | 937 | |
d2b02ed9 | 938 | len = min_t(unsigned int, len, ipv6_optlen(hdr)); |
660adc6e | 939 | if (copy_to_user(optval, hdr, len)) |
333fad53 | 940 | return -EFAULT; |
95b496b6 | 941 | return len; |
333fad53 YH |
942 | } |
943 | ||
3fdadf7d | 944 | static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
95c96174 | 945 | char __user *optval, int __user *optlen, unsigned int flags) |
1da177e4 LT |
946 | { |
947 | struct ipv6_pinfo *np = inet6_sk(sk); | |
948 | int len; | |
949 | int val; | |
950 | ||
7bc570c8 YH |
951 | if (ip6_mroute_opt(optname)) |
952 | return ip6_mroute_getsockopt(sk, optname, optval, optlen); | |
953 | ||
1da177e4 LT |
954 | if (get_user(len, optlen)) |
955 | return -EFAULT; | |
956 | switch (optname) { | |
957 | case IPV6_ADDRFORM: | |
958 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 959 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 | 960 | sk->sk_protocol != IPPROTO_TCP) |
1717699c | 961 | return -ENOPROTOOPT; |
1da177e4 LT |
962 | if (sk->sk_state != TCP_ESTABLISHED) |
963 | return -ENOTCONN; | |
964 | val = sk->sk_family; | |
965 | break; | |
966 | case MCAST_MSFILTER: | |
967 | { | |
968 | struct group_filter gsf; | |
969 | int err; | |
970 | ||
971 | if (len < GROUP_FILTER_SIZE(0)) | |
972 | return -EINVAL; | |
973 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
974 | return -EFAULT; | |
20c61fbd YH |
975 | if (gsf.gf_group.ss_family != AF_INET6) |
976 | return -EADDRNOTAVAIL; | |
1da177e4 LT |
977 | lock_sock(sk); |
978 | err = ip6_mc_msfget(sk, &gsf, | |
979 | (struct group_filter __user *)optval, optlen); | |
980 | release_sock(sk); | |
981 | return err; | |
982 | } | |
983 | ||
333fad53 | 984 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
985 | { |
986 | struct msghdr msg; | |
987 | struct sk_buff *skb; | |
988 | ||
989 | if (sk->sk_type != SOCK_STREAM) | |
990 | return -ENOPROTOOPT; | |
991 | ||
992 | msg.msg_control = optval; | |
993 | msg.msg_controllen = len; | |
98e77438 | 994 | msg.msg_flags = flags; |
1da177e4 LT |
995 | |
996 | lock_sock(sk); | |
997 | skb = np->pktoptions; | |
998 | if (skb) | |
999 | atomic_inc(&skb->users); | |
1000 | release_sock(sk); | |
1001 | ||
1002 | if (skb) { | |
4b261c75 | 1003 | ip6_datagram_recv_ctl(sk, &msg, skb); |
1da177e4 | 1004 | kfree_skb(skb); |
1da177e4 LT |
1005 | } else { |
1006 | if (np->rxopt.bits.rxinfo) { | |
1007 | struct in6_pktinfo src_info; | |
f250dcda YH |
1008 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
1009 | np->sticky_pktinfo.ipi6_ifindex; | |
efe4208f | 1010 | src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : np->sticky_pktinfo.ipi6_addr; |
1da177e4 LT |
1011 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); |
1012 | } | |
1013 | if (np->rxopt.bits.rxhlim) { | |
1014 | int hlim = np->mcast_hops; | |
1015 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
1016 | } | |
4c507d28 | 1017 | if (np->rxopt.bits.rxtclass) { |
d76ed22b LR |
1018 | int tclass = (int)ip6_tclass(np->rcv_flowinfo); |
1019 | ||
4c507d28 JB |
1020 | put_cmsg(&msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass); |
1021 | } | |
333fad53 YH |
1022 | if (np->rxopt.bits.rxoinfo) { |
1023 | struct in6_pktinfo src_info; | |
f250dcda YH |
1024 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
1025 | np->sticky_pktinfo.ipi6_ifindex; | |
efe4208f ED |
1026 | src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : |
1027 | np->sticky_pktinfo.ipi6_addr; | |
333fad53 YH |
1028 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); |
1029 | } | |
1030 | if (np->rxopt.bits.rxohlim) { | |
1031 | int hlim = np->mcast_hops; | |
1032 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
1033 | } | |
1397ed35 | 1034 | if (np->rxopt.bits.rxflow) { |
68536053 FF |
1035 | __be32 flowinfo = np->rcv_flowinfo; |
1036 | ||
1397ed35 FF |
1037 | put_cmsg(&msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo); |
1038 | } | |
1da177e4 LT |
1039 | } |
1040 | len -= msg.msg_controllen; | |
1041 | return put_user(len, optlen); | |
1042 | } | |
1043 | case IPV6_MTU: | |
1044 | { | |
1045 | struct dst_entry *dst; | |
b6c6712a | 1046 | |
1ab1457c | 1047 | val = 0; |
b6c6712a ED |
1048 | rcu_read_lock(); |
1049 | dst = __sk_dst_get(sk); | |
1050 | if (dst) | |
1da177e4 | 1051 | val = dst_mtu(dst); |
b6c6712a | 1052 | rcu_read_unlock(); |
1da177e4 LT |
1053 | if (!val) |
1054 | return -ENOTCONN; | |
1055 | break; | |
1056 | } | |
1057 | ||
1058 | case IPV6_V6ONLY: | |
9fe516ba | 1059 | val = sk->sk_ipv6only; |
1da177e4 LT |
1060 | break; |
1061 | ||
333fad53 | 1062 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
1063 | val = np->rxopt.bits.rxinfo; |
1064 | break; | |
1065 | ||
333fad53 YH |
1066 | case IPV6_2292PKTINFO: |
1067 | val = np->rxopt.bits.rxoinfo; | |
1068 | break; | |
1069 | ||
1070 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
1071 | val = np->rxopt.bits.rxhlim; |
1072 | break; | |
1073 | ||
333fad53 YH |
1074 | case IPV6_2292HOPLIMIT: |
1075 | val = np->rxopt.bits.rxohlim; | |
1076 | break; | |
1077 | ||
1078 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
1079 | val = np->rxopt.bits.srcrt; |
1080 | break; | |
1081 | ||
333fad53 YH |
1082 | case IPV6_2292RTHDR: |
1083 | val = np->rxopt.bits.osrcrt; | |
1084 | break; | |
1085 | ||
1da177e4 | 1086 | case IPV6_HOPOPTS: |
333fad53 YH |
1087 | case IPV6_RTHDRDSTOPTS: |
1088 | case IPV6_RTHDR: | |
1089 | case IPV6_DSTOPTS: | |
1090 | { | |
1091 | ||
1092 | lock_sock(sk); | |
28693079 | 1093 | len = ipv6_getsockopt_sticky(sk, np->opt, |
4c6510a7 | 1094 | optname, optval, len); |
333fad53 | 1095 | release_sock(sk); |
05335c22 YH |
1096 | /* check if ipv6_getsockopt_sticky() returns err code */ |
1097 | if (len < 0) | |
1098 | return len; | |
333fad53 YH |
1099 | return put_user(len, optlen); |
1100 | } | |
1101 | ||
1102 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
1103 | val = np->rxopt.bits.hopopts; |
1104 | break; | |
1105 | ||
333fad53 YH |
1106 | case IPV6_2292HOPOPTS: |
1107 | val = np->rxopt.bits.ohopopts; | |
1108 | break; | |
1109 | ||
1110 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
1111 | val = np->rxopt.bits.dstopts; |
1112 | break; | |
1113 | ||
333fad53 YH |
1114 | case IPV6_2292DSTOPTS: |
1115 | val = np->rxopt.bits.odstopts; | |
1116 | break; | |
1117 | ||
41a1f8ea YH |
1118 | case IPV6_TCLASS: |
1119 | val = np->tclass; | |
1120 | break; | |
1121 | ||
1122 | case IPV6_RECVTCLASS: | |
1123 | val = np->rxopt.bits.rxtclass; | |
1124 | break; | |
1125 | ||
1da177e4 LT |
1126 | case IPV6_FLOWINFO: |
1127 | val = np->rxopt.bits.rxflow; | |
1128 | break; | |
1129 | ||
793b1473 BH |
1130 | case IPV6_RECVPATHMTU: |
1131 | val = np->rxopt.bits.rxpmtu; | |
1132 | break; | |
1133 | ||
1134 | case IPV6_PATHMTU: | |
1135 | { | |
1136 | struct dst_entry *dst; | |
1137 | struct ip6_mtuinfo mtuinfo; | |
1138 | ||
1139 | if (len < sizeof(mtuinfo)) | |
1140 | return -EINVAL; | |
1141 | ||
1142 | len = sizeof(mtuinfo); | |
1143 | memset(&mtuinfo, 0, sizeof(mtuinfo)); | |
1144 | ||
1145 | rcu_read_lock(); | |
1146 | dst = __sk_dst_get(sk); | |
1147 | if (dst) | |
1148 | mtuinfo.ip6m_mtu = dst_mtu(dst); | |
1149 | rcu_read_unlock(); | |
1150 | if (!mtuinfo.ip6m_mtu) | |
1151 | return -ENOTCONN; | |
1152 | ||
1153 | if (put_user(len, optlen)) | |
1154 | return -EFAULT; | |
1155 | if (copy_to_user(optval, &mtuinfo, len)) | |
1156 | return -EFAULT; | |
1157 | ||
1158 | return 0; | |
793b1473 BH |
1159 | } |
1160 | ||
6c468622 BS |
1161 | case IPV6_TRANSPARENT: |
1162 | val = inet_sk(sk)->transparent; | |
1163 | break; | |
1164 | ||
1165 | case IPV6_RECVORIGDSTADDR: | |
1166 | val = np->rxopt.bits.rxorigdstaddr; | |
1167 | break; | |
1168 | ||
1da177e4 | 1169 | case IPV6_UNICAST_HOPS: |
1da177e4 | 1170 | case IPV6_MULTICAST_HOPS: |
befffe90 BH |
1171 | { |
1172 | struct dst_entry *dst; | |
1173 | ||
1174 | if (optname == IPV6_UNICAST_HOPS) | |
1175 | val = np->hop_limit; | |
1176 | else | |
1177 | val = np->mcast_hops; | |
1178 | ||
b6c6712a ED |
1179 | if (val < 0) { |
1180 | rcu_read_lock(); | |
1181 | dst = __sk_dst_get(sk); | |
1182 | if (dst) | |
6b75d090 | 1183 | val = ip6_dst_hoplimit(dst); |
b6c6712a | 1184 | rcu_read_unlock(); |
befffe90 | 1185 | } |
b6c6712a | 1186 | |
befffe90 | 1187 | if (val < 0) |
53b7997f | 1188 | val = sock_net(sk)->ipv6.devconf_all->hop_limit; |
1da177e4 | 1189 | break; |
befffe90 | 1190 | } |
1da177e4 LT |
1191 | |
1192 | case IPV6_MULTICAST_LOOP: | |
1193 | val = np->mc_loop; | |
1194 | break; | |
1195 | ||
1196 | case IPV6_MULTICAST_IF: | |
1197 | val = np->mcast_oif; | |
1198 | break; | |
1199 | ||
c4062dfc EH |
1200 | case IPV6_UNICAST_IF: |
1201 | val = (__force int)htonl((__u32) np->ucast_oif); | |
1202 | break; | |
1203 | ||
1da177e4 LT |
1204 | case IPV6_MTU_DISCOVER: |
1205 | val = np->pmtudisc; | |
1206 | break; | |
1207 | ||
1208 | case IPV6_RECVERR: | |
1209 | val = np->recverr; | |
1210 | break; | |
1211 | ||
1212 | case IPV6_FLOWINFO_SEND: | |
1213 | val = np->sndflow; | |
1214 | break; | |
1215 | ||
3fdfa5ff FF |
1216 | case IPV6_FLOWLABEL_MGR: |
1217 | { | |
1218 | struct in6_flowlabel_req freq; | |
46e5f401 | 1219 | int flags; |
3fdfa5ff FF |
1220 | |
1221 | if (len < sizeof(freq)) | |
1222 | return -EINVAL; | |
1223 | ||
1224 | if (copy_from_user(&freq, optval, sizeof(freq))) | |
1225 | return -EFAULT; | |
1226 | ||
1227 | if (freq.flr_action != IPV6_FL_A_GET) | |
1228 | return -EINVAL; | |
1229 | ||
1230 | len = sizeof(freq); | |
46e5f401 FF |
1231 | flags = freq.flr_flags; |
1232 | ||
3fdfa5ff FF |
1233 | memset(&freq, 0, sizeof(freq)); |
1234 | ||
46e5f401 | 1235 | val = ipv6_flowlabel_opt_get(sk, &freq, flags); |
3fdfa5ff FF |
1236 | if (val < 0) |
1237 | return val; | |
1238 | ||
1239 | if (put_user(len, optlen)) | |
1240 | return -EFAULT; | |
1241 | if (copy_to_user(optval, &freq, len)) | |
1242 | return -EFAULT; | |
1243 | ||
1244 | return 0; | |
1245 | } | |
1246 | ||
7cbca67c YH |
1247 | case IPV6_ADDR_PREFERENCES: |
1248 | val = 0; | |
1249 | ||
1250 | if (np->srcprefs & IPV6_PREFER_SRC_TMP) | |
1251 | val |= IPV6_PREFER_SRC_TMP; | |
1252 | else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) | |
1253 | val |= IPV6_PREFER_SRC_PUBLIC; | |
1254 | else { | |
1255 | /* XXX: should we return system default? */ | |
1256 | val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; | |
1257 | } | |
1258 | ||
1259 | if (np->srcprefs & IPV6_PREFER_SRC_COA) | |
1260 | val |= IPV6_PREFER_SRC_COA; | |
1261 | else | |
1262 | val |= IPV6_PREFER_SRC_HOME; | |
1263 | break; | |
e802af9c SH |
1264 | |
1265 | case IPV6_MINHOPCOUNT: | |
1266 | val = np->min_hopcount; | |
1267 | break; | |
793b1473 BH |
1268 | |
1269 | case IPV6_DONTFRAG: | |
1270 | val = np->dontfrag; | |
1271 | break; | |
7cbca67c | 1272 | |
cb1ce2ef TH |
1273 | case IPV6_AUTOFLOWLABEL: |
1274 | val = np->autoflowlabel; | |
1275 | break; | |
1276 | ||
1da177e4 | 1277 | default: |
cf6fc4a9 | 1278 | return -ENOPROTOOPT; |
1da177e4 LT |
1279 | } |
1280 | len = min_t(unsigned int, sizeof(int), len); | |
67ba4152 | 1281 | if (put_user(len, optlen)) |
1da177e4 | 1282 | return -EFAULT; |
67ba4152 | 1283 | if (copy_to_user(optval, &val, len)) |
1da177e4 LT |
1284 | return -EFAULT; |
1285 | return 0; | |
1286 | } | |
1287 | ||
3fdadf7d DM |
1288 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1289 | char __user *optval, int __user *optlen) | |
1290 | { | |
1291 | int err; | |
1292 | ||
1293 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
1294 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
1295 | ||
67ba4152 | 1296 | if (level != SOL_IPV6) |
3fdadf7d DM |
1297 | return -ENOPROTOOPT; |
1298 | ||
98e77438 | 1299 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 0); |
3fdadf7d | 1300 | #ifdef CONFIG_NETFILTER |
cf6fc4a9 WY |
1301 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1302 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1303 | int len; |
1304 | ||
1305 | if (get_user(len, optlen)) | |
1306 | return -EFAULT; | |
1307 | ||
1308 | lock_sock(sk); | |
1309 | err = nf_getsockopt(sk, PF_INET6, optname, optval, | |
1310 | &len); | |
1311 | release_sock(sk); | |
1312 | if (err >= 0) | |
1313 | err = put_user(len, optlen); | |
1314 | } | |
1315 | #endif | |
1316 | return err; | |
1317 | } | |
7159039a YH |
1318 | EXPORT_SYMBOL(ipv6_getsockopt); |
1319 | ||
3fdadf7d DM |
1320 | #ifdef CONFIG_COMPAT |
1321 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1322 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
1323 | { |
1324 | int err; | |
1325 | ||
1326 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
1327 | if (udp_prot.compat_getsockopt != NULL) |
1328 | return udp_prot.compat_getsockopt(sk, level, optname, | |
1329 | optval, optlen); | |
1330 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
1331 | } |
1332 | ||
543d9cfe | 1333 | if (level != SOL_IPV6) |
3fdadf7d DM |
1334 | return -ENOPROTOOPT; |
1335 | ||
80991790 PE |
1336 | if (optname == MCAST_MSFILTER) |
1337 | return compat_mc_getsockopt(sk, level, optname, optval, optlen, | |
1338 | ipv6_getsockopt); | |
1339 | ||
98e77438 DB |
1340 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, |
1341 | MSG_CMSG_COMPAT); | |
3fdadf7d | 1342 | #ifdef CONFIG_NETFILTER |
cf6fc4a9 WY |
1343 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1344 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1345 | int len; |
1346 | ||
1347 | if (get_user(len, optlen)) | |
1348 | return -EFAULT; | |
1349 | ||
1350 | lock_sock(sk); | |
543d9cfe ACM |
1351 | err = compat_nf_getsockopt(sk, PF_INET6, |
1352 | optname, optval, &len); | |
3fdadf7d DM |
1353 | release_sock(sk); |
1354 | if (err >= 0) | |
1355 | err = put_user(len, optlen); | |
1356 | } | |
1357 | #endif | |
1358 | return err; | |
1359 | } | |
543d9cfe | 1360 | EXPORT_SYMBOL(compat_ipv6_getsockopt); |
3fdadf7d DM |
1361 | #endif |
1362 |