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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> |
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 | ||
baf606d9 MRL |
120 | static bool setsockopt_needs_rtnl(int optname) |
121 | { | |
122 | switch (optname) { | |
123 | case IPV6_ADD_MEMBERSHIP: | |
124 | case IPV6_DROP_MEMBERSHIP: | |
125 | case MCAST_JOIN_GROUP: | |
126 | case MCAST_LEAVE_GROUP: | |
127 | return true; | |
128 | } | |
129 | return false; | |
130 | } | |
131 | ||
3fdadf7d | 132 | static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 133 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
134 | { |
135 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 136 | struct net *net = sock_net(sk); |
1da177e4 LT |
137 | int val, valbool; |
138 | int retv = -ENOPROTOOPT; | |
baf606d9 | 139 | bool needs_rtnl = setsockopt_needs_rtnl(optname); |
1da177e4 | 140 | |
1da177e4 | 141 | if (optval == NULL) |
67ba4152 | 142 | val = 0; |
b2a9d7c2 YH |
143 | else { |
144 | if (optlen >= sizeof(int)) { | |
145 | if (get_user(val, (int __user *) optval)) | |
146 | return -EFAULT; | |
147 | } else | |
148 | val = 0; | |
149 | } | |
1da177e4 | 150 | |
67ba4152 | 151 | valbool = (val != 0); |
1da177e4 | 152 | |
7bc570c8 YH |
153 | if (ip6_mroute_opt(optname)) |
154 | return ip6_mroute_setsockopt(sk, optname, optval, optlen); | |
155 | ||
baf606d9 MRL |
156 | if (needs_rtnl) |
157 | rtnl_lock(); | |
1da177e4 LT |
158 | lock_sock(sk); |
159 | ||
160 | switch (optname) { | |
161 | ||
162 | case IPV6_ADDRFORM: | |
b2a9d7c2 YH |
163 | if (optlen < sizeof(int)) |
164 | goto e_inval; | |
1da177e4 LT |
165 | if (val == PF_INET) { |
166 | struct ipv6_txoptions *opt; | |
167 | struct sk_buff *pktopt; | |
168 | ||
49d074f4 DL |
169 | if (sk->sk_type == SOCK_RAW) |
170 | break; | |
171 | ||
9596cc82 DL |
172 | if (sk->sk_protocol == IPPROTO_UDP || |
173 | sk->sk_protocol == IPPROTO_UDPLITE) { | |
174 | struct udp_sock *up = udp_sk(sk); | |
175 | if (up->pending == AF_INET6) { | |
176 | retv = -EBUSY; | |
177 | break; | |
178 | } | |
179 | } else if (sk->sk_protocol != IPPROTO_TCP) | |
1da177e4 LT |
180 | break; |
181 | ||
182 | if (sk->sk_state != TCP_ESTABLISHED) { | |
183 | retv = -ENOTCONN; | |
184 | break; | |
185 | } | |
186 | ||
187 | if (ipv6_only_sock(sk) || | |
efe4208f | 188 | !ipv6_addr_v4mapped(&sk->sk_v6_daddr)) { |
1da177e4 LT |
189 | retv = -EADDRNOTAVAIL; |
190 | break; | |
191 | } | |
192 | ||
193 | fl6_free_socklist(sk); | |
194 | ipv6_sock_mc_close(sk); | |
195 | ||
e6848976 ACM |
196 | /* |
197 | * Sock is moving from IPv6 to IPv4 (sk_prot), so | |
198 | * remove it from the refcnt debug socks count in the | |
199 | * original family... | |
200 | */ | |
201 | sk_refcnt_debug_dec(sk); | |
202 | ||
1da177e4 | 203 | if (sk->sk_protocol == IPPROTO_TCP) { |
d83d8461 | 204 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 | 205 | local_bh_disable(); |
c29a0bc4 PE |
206 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
207 | sock_prot_inuse_add(net, &tcp_prot, 1); | |
1da177e4 LT |
208 | local_bh_enable(); |
209 | sk->sk_prot = &tcp_prot; | |
d83d8461 | 210 | icsk->icsk_af_ops = &ipv4_specific; |
1da177e4 LT |
211 | sk->sk_socket->ops = &inet_stream_ops; |
212 | sk->sk_family = PF_INET; | |
d83d8461 | 213 | tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); |
1da177e4 | 214 | } else { |
ba4e58ec GR |
215 | struct proto *prot = &udp_prot; |
216 | ||
db8dac20 | 217 | if (sk->sk_protocol == IPPROTO_UDPLITE) |
ba4e58ec | 218 | prot = &udplite_prot; |
1da177e4 | 219 | local_bh_disable(); |
c29a0bc4 PE |
220 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
221 | sock_prot_inuse_add(net, prot, 1); | |
1da177e4 | 222 | local_bh_enable(); |
ba4e58ec | 223 | sk->sk_prot = prot; |
1da177e4 LT |
224 | sk->sk_socket->ops = &inet_dgram_ops; |
225 | sk->sk_family = PF_INET; | |
226 | } | |
227 | opt = xchg(&np->opt, NULL); | |
228 | if (opt) | |
229 | sock_kfree_s(sk, opt, opt->tot_len); | |
230 | pktopt = xchg(&np->pktoptions, NULL); | |
800d55f1 | 231 | kfree_skb(pktopt); |
1da177e4 LT |
232 | |
233 | sk->sk_destruct = inet_sock_destruct; | |
e6848976 ACM |
234 | /* |
235 | * ... and add it to the refcnt debug socks count | |
236 | * in the new family. -acme | |
237 | */ | |
238 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
239 | module_put(THIS_MODULE); |
240 | retv = 0; | |
241 | break; | |
242 | } | |
243 | goto e_inval; | |
244 | ||
245 | case IPV6_V6ONLY: | |
b2a9d7c2 | 246 | if (optlen < sizeof(int) || |
c720c7e8 | 247 | inet_sk(sk)->inet_num) |
1da177e4 | 248 | goto e_inval; |
9fe516ba | 249 | sk->sk_ipv6only = valbool; |
1da177e4 LT |
250 | retv = 0; |
251 | break; | |
252 | ||
333fad53 | 253 | case IPV6_RECVPKTINFO: |
b2a9d7c2 YH |
254 | if (optlen < sizeof(int)) |
255 | goto e_inval; | |
1da177e4 LT |
256 | np->rxopt.bits.rxinfo = valbool; |
257 | retv = 0; | |
258 | break; | |
1ab1457c | 259 | |
333fad53 | 260 | case IPV6_2292PKTINFO: |
b2a9d7c2 YH |
261 | if (optlen < sizeof(int)) |
262 | goto e_inval; | |
333fad53 YH |
263 | np->rxopt.bits.rxoinfo = valbool; |
264 | retv = 0; | |
265 | break; | |
1da177e4 | 266 | |
333fad53 | 267 | case IPV6_RECVHOPLIMIT: |
b2a9d7c2 YH |
268 | if (optlen < sizeof(int)) |
269 | goto e_inval; | |
1da177e4 LT |
270 | np->rxopt.bits.rxhlim = valbool; |
271 | retv = 0; | |
272 | break; | |
273 | ||
333fad53 | 274 | case IPV6_2292HOPLIMIT: |
b2a9d7c2 YH |
275 | if (optlen < sizeof(int)) |
276 | goto e_inval; | |
333fad53 YH |
277 | np->rxopt.bits.rxohlim = valbool; |
278 | retv = 0; | |
279 | break; | |
280 | ||
281 | case IPV6_RECVRTHDR: | |
b2a9d7c2 YH |
282 | if (optlen < sizeof(int)) |
283 | goto e_inval; | |
4c752098 | 284 | np->rxopt.bits.srcrt = valbool; |
1da177e4 LT |
285 | retv = 0; |
286 | break; | |
287 | ||
333fad53 | 288 | case IPV6_2292RTHDR: |
b2a9d7c2 YH |
289 | if (optlen < sizeof(int)) |
290 | goto e_inval; | |
4c752098 | 291 | np->rxopt.bits.osrcrt = valbool; |
333fad53 YH |
292 | retv = 0; |
293 | break; | |
294 | ||
295 | case IPV6_RECVHOPOPTS: | |
b2a9d7c2 YH |
296 | if (optlen < sizeof(int)) |
297 | goto e_inval; | |
1da177e4 LT |
298 | np->rxopt.bits.hopopts = valbool; |
299 | retv = 0; | |
300 | break; | |
301 | ||
333fad53 | 302 | case IPV6_2292HOPOPTS: |
b2a9d7c2 YH |
303 | if (optlen < sizeof(int)) |
304 | goto e_inval; | |
333fad53 YH |
305 | np->rxopt.bits.ohopopts = valbool; |
306 | retv = 0; | |
307 | break; | |
308 | ||
309 | case IPV6_RECVDSTOPTS: | |
b2a9d7c2 YH |
310 | if (optlen < sizeof(int)) |
311 | goto e_inval; | |
1da177e4 LT |
312 | np->rxopt.bits.dstopts = valbool; |
313 | retv = 0; | |
314 | break; | |
315 | ||
333fad53 | 316 | case IPV6_2292DSTOPTS: |
b2a9d7c2 YH |
317 | if (optlen < sizeof(int)) |
318 | goto e_inval; | |
333fad53 YH |
319 | np->rxopt.bits.odstopts = valbool; |
320 | retv = 0; | |
321 | break; | |
322 | ||
41a1f8ea | 323 | case IPV6_TCLASS: |
b2a9d7c2 YH |
324 | if (optlen < sizeof(int)) |
325 | goto e_inval; | |
d0ee011f | 326 | if (val < -1 || val > 0xff) |
41a1f8ea | 327 | goto e_inval; |
26ced1e4 GR |
328 | /* RFC 3542, 6.5: default traffic class of 0x0 */ |
329 | if (val == -1) | |
330 | val = 0; | |
41a1f8ea YH |
331 | np->tclass = val; |
332 | retv = 0; | |
333 | break; | |
1ab1457c | 334 | |
41a1f8ea | 335 | case IPV6_RECVTCLASS: |
b2a9d7c2 YH |
336 | if (optlen < sizeof(int)) |
337 | goto e_inval; | |
41a1f8ea YH |
338 | np->rxopt.bits.rxtclass = valbool; |
339 | retv = 0; | |
340 | break; | |
341 | ||
1da177e4 | 342 | case IPV6_FLOWINFO: |
b2a9d7c2 YH |
343 | if (optlen < sizeof(int)) |
344 | goto e_inval; | |
1da177e4 LT |
345 | np->rxopt.bits.rxflow = valbool; |
346 | retv = 0; | |
347 | break; | |
348 | ||
793b1473 BH |
349 | case IPV6_RECVPATHMTU: |
350 | if (optlen < sizeof(int)) | |
351 | goto e_inval; | |
352 | np->rxopt.bits.rxpmtu = valbool; | |
353 | retv = 0; | |
354 | break; | |
355 | ||
6c468622 | 356 | case IPV6_TRANSPARENT: |
af31f412 EB |
357 | if (valbool && !ns_capable(net->user_ns, CAP_NET_ADMIN) && |
358 | !ns_capable(net->user_ns, CAP_NET_RAW)) { | |
b889416b BS |
359 | retv = -EPERM; |
360 | break; | |
361 | } | |
6c468622 BS |
362 | if (optlen < sizeof(int)) |
363 | goto e_inval; | |
364 | /* we don't have a separate transparent bit for IPV6 we use the one in the IPv4 socket */ | |
365 | inet_sk(sk)->transparent = valbool; | |
366 | retv = 0; | |
367 | break; | |
368 | ||
369 | case IPV6_RECVORIGDSTADDR: | |
370 | if (optlen < sizeof(int)) | |
371 | goto e_inval; | |
372 | np->rxopt.bits.rxorigdstaddr = valbool; | |
373 | retv = 0; | |
374 | break; | |
375 | ||
333fad53 YH |
376 | case IPV6_HOPOPTS: |
377 | case IPV6_RTHDRDSTOPTS: | |
378 | case IPV6_RTHDR: | |
379 | case IPV6_DSTOPTS: | |
380 | { | |
381 | struct ipv6_txoptions *opt; | |
aea7427f SW |
382 | |
383 | /* remove any sticky options header with a zero option | |
384 | * length, per RFC3542. | |
385 | */ | |
333fad53 | 386 | if (optlen == 0) |
cb422c46 | 387 | optval = NULL; |
cfb266c0 YH |
388 | else if (optval == NULL) |
389 | goto e_inval; | |
aea7427f SW |
390 | else if (optlen < sizeof(struct ipv6_opt_hdr) || |
391 | optlen & 0x7 || optlen > 8 * 255) | |
392 | goto e_inval; | |
333fad53 YH |
393 | |
394 | /* hop-by-hop / destination options are privileged option */ | |
395 | retv = -EPERM; | |
af31f412 | 396 | if (optname != IPV6_RTHDR && !ns_capable(net->user_ns, CAP_NET_RAW)) |
333fad53 YH |
397 | break; |
398 | ||
333fad53 YH |
399 | opt = ipv6_renew_options(sk, np->opt, optname, |
400 | (struct ipv6_opt_hdr __user *)optval, | |
401 | optlen); | |
402 | if (IS_ERR(opt)) { | |
403 | retv = PTR_ERR(opt); | |
404 | break; | |
405 | } | |
406 | ||
407 | /* routing header option needs extra check */ | |
6e093d9d | 408 | retv = -EINVAL; |
dfee0a72 | 409 | if (optname == IPV6_RTHDR && opt && opt->srcrt) { |
333fad53 | 410 | struct ipv6_rt_hdr *rthdr = opt->srcrt; |
280a9d34 | 411 | switch (rthdr->type) { |
07a93626 | 412 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
280a9d34 | 413 | case IPV6_SRCRT_TYPE_2: |
6e093d9d BH |
414 | if (rthdr->hdrlen != 2 || |
415 | rthdr->segments_left != 1) | |
416 | goto sticky_done; | |
417 | ||
280a9d34 | 418 | break; |
bb4dbf9e | 419 | #endif |
280a9d34 | 420 | default: |
333fad53 | 421 | goto sticky_done; |
280a9d34 | 422 | } |
333fad53 YH |
423 | } |
424 | ||
425 | retv = 0; | |
e7712f1a | 426 | opt = ipv6_update_options(sk, opt); |
333fad53 YH |
427 | sticky_done: |
428 | if (opt) | |
429 | sock_kfree_s(sk, opt, opt->tot_len); | |
430 | break; | |
431 | } | |
432 | ||
b24a2516 YH |
433 | case IPV6_PKTINFO: |
434 | { | |
435 | struct in6_pktinfo pkt; | |
436 | ||
437 | if (optlen == 0) | |
438 | goto e_inval; | |
439 | else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL) | |
440 | goto e_inval; | |
441 | ||
914d1164 | 442 | if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) { |
b24a2516 YH |
443 | retv = -EFAULT; |
444 | break; | |
445 | } | |
446 | if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if) | |
447 | goto e_inval; | |
448 | ||
449 | np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex; | |
4e3fd7a0 | 450 | np->sticky_pktinfo.ipi6_addr = pkt.ipi6_addr; |
b24a2516 YH |
451 | retv = 0; |
452 | break; | |
453 | } | |
454 | ||
333fad53 | 455 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
456 | { |
457 | struct ipv6_txoptions *opt = NULL; | |
458 | struct msghdr msg; | |
4c9483b2 | 459 | struct flowi6 fl6; |
1da177e4 LT |
460 | int junk; |
461 | ||
4c9483b2 DM |
462 | memset(&fl6, 0, sizeof(fl6)); |
463 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
464 | fl6.flowi6_mark = sk->sk_mark; | |
1da177e4 LT |
465 | |
466 | if (optlen == 0) | |
467 | goto update; | |
468 | ||
469 | /* 1K is probably excessive | |
470 | * 1K is surely not enough, 2K per standard header is 16K. | |
471 | */ | |
472 | retv = -EINVAL; | |
473 | if (optlen > 64*1024) | |
474 | break; | |
475 | ||
476 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
477 | retv = -ENOBUFS; | |
478 | if (opt == NULL) | |
479 | break; | |
480 | ||
481 | memset(opt, 0, sizeof(*opt)); | |
482 | opt->tot_len = sizeof(*opt) + optlen; | |
483 | retv = -EFAULT; | |
484 | if (copy_from_user(opt+1, optval, optlen)) | |
485 | goto done; | |
486 | ||
487 | msg.msg_controllen = optlen; | |
67ba4152 | 488 | msg.msg_control = (void *)(opt+1); |
1da177e4 | 489 | |
73df66f8 TP |
490 | retv = ip6_datagram_send_ctl(net, sk, &msg, &fl6, opt, &junk, |
491 | &junk, &junk); | |
1da177e4 LT |
492 | if (retv) |
493 | goto done; | |
494 | update: | |
495 | retv = 0; | |
e7712f1a | 496 | opt = ipv6_update_options(sk, opt); |
1da177e4 LT |
497 | done: |
498 | if (opt) | |
499 | sock_kfree_s(sk, opt, opt->tot_len); | |
500 | break; | |
501 | } | |
502 | case IPV6_UNICAST_HOPS: | |
b2a9d7c2 YH |
503 | if (optlen < sizeof(int)) |
504 | goto e_inval; | |
1da177e4 LT |
505 | if (val > 255 || val < -1) |
506 | goto e_inval; | |
507 | np->hop_limit = val; | |
508 | retv = 0; | |
509 | break; | |
510 | ||
511 | case IPV6_MULTICAST_HOPS: | |
512 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 513 | break; |
b2a9d7c2 YH |
514 | if (optlen < sizeof(int)) |
515 | goto e_inval; | |
1da177e4 LT |
516 | if (val > 255 || val < -1) |
517 | goto e_inval; | |
2a38e6d5 | 518 | np->mcast_hops = (val == -1 ? IPV6_DEFAULT_MCASTHOPS : val); |
1da177e4 LT |
519 | retv = 0; |
520 | break; | |
521 | ||
522 | case IPV6_MULTICAST_LOOP: | |
b2a9d7c2 YH |
523 | if (optlen < sizeof(int)) |
524 | goto e_inval; | |
28d44882 YH |
525 | if (val != valbool) |
526 | goto e_inval; | |
1da177e4 LT |
527 | np->mc_loop = valbool; |
528 | retv = 0; | |
529 | break; | |
530 | ||
c4062dfc EH |
531 | case IPV6_UNICAST_IF: |
532 | { | |
533 | struct net_device *dev = NULL; | |
534 | int ifindex; | |
535 | ||
536 | if (optlen != sizeof(int)) | |
537 | goto e_inval; | |
538 | ||
539 | ifindex = (__force int)ntohl((__force __be32)val); | |
540 | if (ifindex == 0) { | |
541 | np->ucast_oif = 0; | |
542 | retv = 0; | |
543 | break; | |
544 | } | |
545 | ||
546 | dev = dev_get_by_index(net, ifindex); | |
547 | retv = -EADDRNOTAVAIL; | |
548 | if (!dev) | |
549 | break; | |
550 | dev_put(dev); | |
551 | ||
552 | retv = -EINVAL; | |
553 | if (sk->sk_bound_dev_if) | |
554 | break; | |
555 | ||
556 | np->ucast_oif = ifindex; | |
557 | retv = 0; | |
558 | break; | |
559 | } | |
560 | ||
1da177e4 LT |
561 | case IPV6_MULTICAST_IF: |
562 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 563 | break; |
b2a9d7c2 YH |
564 | if (optlen < sizeof(int)) |
565 | goto e_inval; | |
1da177e4 | 566 | |
4953f0fc | 567 | if (val) { |
55b80503 ED |
568 | struct net_device *dev; |
569 | ||
4953f0fc BH |
570 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) |
571 | goto e_inval; | |
572 | ||
55b80503 ED |
573 | dev = dev_get_by_index(net, val); |
574 | if (!dev) { | |
4953f0fc BH |
575 | retv = -ENODEV; |
576 | break; | |
577 | } | |
55b80503 | 578 | dev_put(dev); |
1da177e4 LT |
579 | } |
580 | np->mcast_oif = val; | |
581 | retv = 0; | |
582 | break; | |
583 | case IPV6_ADD_MEMBERSHIP: | |
584 | case IPV6_DROP_MEMBERSHIP: | |
585 | { | |
586 | struct ipv6_mreq mreq; | |
587 | ||
a28398ba WC |
588 | if (optlen < sizeof(struct ipv6_mreq)) |
589 | goto e_inval; | |
590 | ||
a96fb49b FL |
591 | retv = -EPROTO; |
592 | if (inet_sk(sk)->is_icsk) | |
593 | break; | |
594 | ||
1da177e4 LT |
595 | retv = -EFAULT; |
596 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
597 | break; | |
598 | ||
599 | if (optname == IPV6_ADD_MEMBERSHIP) | |
baf606d9 | 600 | retv = __ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); |
1da177e4 | 601 | else |
baf606d9 | 602 | retv = __ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); |
1da177e4 LT |
603 | break; |
604 | } | |
605 | case IPV6_JOIN_ANYCAST: | |
606 | case IPV6_LEAVE_ANYCAST: | |
607 | { | |
608 | struct ipv6_mreq mreq; | |
609 | ||
a28398ba | 610 | if (optlen < sizeof(struct ipv6_mreq)) |
1da177e4 LT |
611 | goto e_inval; |
612 | ||
613 | retv = -EFAULT; | |
614 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
615 | break; | |
616 | ||
617 | if (optname == IPV6_JOIN_ANYCAST) | |
618 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
619 | else | |
620 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
621 | break; | |
622 | } | |
623 | case MCAST_JOIN_GROUP: | |
624 | case MCAST_LEAVE_GROUP: | |
625 | { | |
626 | struct group_req greq; | |
627 | struct sockaddr_in6 *psin6; | |
628 | ||
a28398ba WC |
629 | if (optlen < sizeof(struct group_req)) |
630 | goto e_inval; | |
631 | ||
1da177e4 LT |
632 | retv = -EFAULT; |
633 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
634 | break; | |
635 | if (greq.gr_group.ss_family != AF_INET6) { | |
636 | retv = -EADDRNOTAVAIL; | |
637 | break; | |
638 | } | |
639 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
640 | if (optname == MCAST_JOIN_GROUP) | |
baf606d9 MRL |
641 | retv = __ipv6_sock_mc_join(sk, greq.gr_interface, |
642 | &psin6->sin6_addr); | |
1da177e4 | 643 | else |
baf606d9 MRL |
644 | retv = __ipv6_sock_mc_drop(sk, greq.gr_interface, |
645 | &psin6->sin6_addr); | |
1da177e4 LT |
646 | break; |
647 | } | |
648 | case MCAST_JOIN_SOURCE_GROUP: | |
649 | case MCAST_LEAVE_SOURCE_GROUP: | |
650 | case MCAST_BLOCK_SOURCE: | |
651 | case MCAST_UNBLOCK_SOURCE: | |
652 | { | |
653 | struct group_source_req greqs; | |
654 | int omode, add; | |
655 | ||
a28398ba | 656 | if (optlen < sizeof(struct group_source_req)) |
1da177e4 LT |
657 | goto e_inval; |
658 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
659 | retv = -EFAULT; | |
660 | break; | |
661 | } | |
662 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
663 | greqs.gsr_source.ss_family != AF_INET6) { | |
664 | retv = -EADDRNOTAVAIL; | |
665 | break; | |
666 | } | |
667 | if (optname == MCAST_BLOCK_SOURCE) { | |
668 | omode = MCAST_EXCLUDE; | |
669 | add = 1; | |
670 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
671 | omode = MCAST_EXCLUDE; | |
672 | add = 0; | |
673 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
674 | struct sockaddr_in6 *psin6; | |
675 | ||
676 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
baf606d9 MRL |
677 | retv = __ipv6_sock_mc_join(sk, greqs.gsr_interface, |
678 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
679 | /* prior join w/ different source is ok */ |
680 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
681 | break; |
682 | omode = MCAST_INCLUDE; | |
683 | add = 1; | |
c9e3e8b6 | 684 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
685 | omode = MCAST_INCLUDE; |
686 | add = 0; | |
687 | } | |
688 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
689 | break; | |
690 | } | |
691 | case MCAST_MSFILTER: | |
692 | { | |
1da177e4 LT |
693 | struct group_filter *gsf; |
694 | ||
695 | if (optlen < GROUP_FILTER_SIZE(0)) | |
696 | goto e_inval; | |
697 | if (optlen > sysctl_optmem_max) { | |
698 | retv = -ENOBUFS; | |
699 | break; | |
700 | } | |
67ba4152 | 701 | gsf = kmalloc(optlen, GFP_KERNEL); |
cfcabdcc | 702 | if (!gsf) { |
1da177e4 LT |
703 | retv = -ENOBUFS; |
704 | break; | |
705 | } | |
706 | retv = -EFAULT; | |
707 | if (copy_from_user(gsf, optval, optlen)) { | |
708 | kfree(gsf); | |
709 | break; | |
710 | } | |
711 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
712 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
713 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
714 | kfree(gsf); | |
715 | retv = -ENOBUFS; | |
716 | break; | |
717 | } | |
718 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
719 | kfree(gsf); | |
720 | retv = -EINVAL; | |
721 | break; | |
722 | } | |
723 | retv = ip6_mc_msfilter(sk, gsf); | |
724 | kfree(gsf); | |
725 | ||
726 | break; | |
727 | } | |
728 | case IPV6_ROUTER_ALERT: | |
b2a9d7c2 YH |
729 | if (optlen < sizeof(int)) |
730 | goto e_inval; | |
725a8ff0 | 731 | retv = ip6_ra_control(sk, val); |
1da177e4 LT |
732 | break; |
733 | case IPV6_MTU_DISCOVER: | |
b2a9d7c2 YH |
734 | if (optlen < sizeof(int)) |
735 | goto e_inval; | |
0b95227a | 736 | if (val < IPV6_PMTUDISC_DONT || val > IPV6_PMTUDISC_OMIT) |
1da177e4 LT |
737 | goto e_inval; |
738 | np->pmtudisc = val; | |
739 | retv = 0; | |
740 | break; | |
741 | case IPV6_MTU: | |
b2a9d7c2 YH |
742 | if (optlen < sizeof(int)) |
743 | goto e_inval; | |
1da177e4 LT |
744 | if (val && val < IPV6_MIN_MTU) |
745 | goto e_inval; | |
746 | np->frag_size = val; | |
747 | retv = 0; | |
748 | break; | |
749 | case IPV6_RECVERR: | |
b2a9d7c2 YH |
750 | if (optlen < sizeof(int)) |
751 | goto e_inval; | |
1da177e4 LT |
752 | np->recverr = valbool; |
753 | if (!val) | |
754 | skb_queue_purge(&sk->sk_error_queue); | |
755 | retv = 0; | |
756 | break; | |
757 | case IPV6_FLOWINFO_SEND: | |
b2a9d7c2 YH |
758 | if (optlen < sizeof(int)) |
759 | goto e_inval; | |
1da177e4 LT |
760 | np->sndflow = valbool; |
761 | retv = 0; | |
762 | break; | |
763 | case IPV6_FLOWLABEL_MGR: | |
764 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
765 | break; | |
766 | case IPV6_IPSEC_POLICY: | |
767 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 | 768 | retv = -EPERM; |
af31f412 | 769 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
6fc0b4a7 | 770 | break; |
1da177e4 LT |
771 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
772 | break; | |
773 | ||
7cbca67c YH |
774 | case IPV6_ADDR_PREFERENCES: |
775 | { | |
776 | unsigned int pref = 0; | |
777 | unsigned int prefmask = ~0; | |
778 | ||
b2a9d7c2 YH |
779 | if (optlen < sizeof(int)) |
780 | goto e_inval; | |
781 | ||
7cbca67c YH |
782 | retv = -EINVAL; |
783 | ||
784 | /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ | |
785 | switch (val & (IPV6_PREFER_SRC_PUBLIC| | |
786 | IPV6_PREFER_SRC_TMP| | |
787 | IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { | |
788 | case IPV6_PREFER_SRC_PUBLIC: | |
789 | pref |= IPV6_PREFER_SRC_PUBLIC; | |
790 | break; | |
791 | case IPV6_PREFER_SRC_TMP: | |
792 | pref |= IPV6_PREFER_SRC_TMP; | |
793 | break; | |
794 | case IPV6_PREFER_SRC_PUBTMP_DEFAULT: | |
795 | break; | |
796 | case 0: | |
797 | goto pref_skip_pubtmp; | |
798 | default: | |
799 | goto e_inval; | |
800 | } | |
801 | ||
802 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| | |
803 | IPV6_PREFER_SRC_TMP); | |
804 | pref_skip_pubtmp: | |
805 | ||
806 | /* check HOME/COA conflicts */ | |
807 | switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { | |
808 | case IPV6_PREFER_SRC_HOME: | |
809 | break; | |
810 | case IPV6_PREFER_SRC_COA: | |
811 | pref |= IPV6_PREFER_SRC_COA; | |
812 | case 0: | |
813 | goto pref_skip_coa; | |
814 | default: | |
815 | goto e_inval; | |
816 | } | |
817 | ||
818 | prefmask &= ~IPV6_PREFER_SRC_COA; | |
819 | pref_skip_coa: | |
820 | ||
821 | /* check CGA/NONCGA conflicts */ | |
822 | switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { | |
823 | case IPV6_PREFER_SRC_CGA: | |
824 | case IPV6_PREFER_SRC_NONCGA: | |
825 | case 0: | |
826 | break; | |
827 | default: | |
828 | goto e_inval; | |
829 | } | |
830 | ||
831 | np->srcprefs = (np->srcprefs & prefmask) | pref; | |
832 | retv = 0; | |
833 | ||
834 | break; | |
835 | } | |
e802af9c SH |
836 | case IPV6_MINHOPCOUNT: |
837 | if (optlen < sizeof(int)) | |
838 | goto e_inval; | |
839 | if (val < 0 || val > 255) | |
840 | goto e_inval; | |
841 | np->min_hopcount = val; | |
d4596bad | 842 | retv = 0; |
793b1473 BH |
843 | break; |
844 | case IPV6_DONTFRAG: | |
845 | np->dontfrag = valbool; | |
e802af9c SH |
846 | retv = 0; |
847 | break; | |
cb1ce2ef TH |
848 | case IPV6_AUTOFLOWLABEL: |
849 | np->autoflowlabel = valbool; | |
850 | retv = 0; | |
851 | break; | |
1da177e4 | 852 | } |
7cbca67c | 853 | |
1da177e4 | 854 | release_sock(sk); |
baf606d9 MRL |
855 | if (needs_rtnl) |
856 | rtnl_unlock(); | |
1da177e4 | 857 | |
1da177e4 LT |
858 | return retv; |
859 | ||
860 | e_inval: | |
861 | release_sock(sk); | |
baf606d9 MRL |
862 | if (needs_rtnl) |
863 | rtnl_unlock(); | |
1da177e4 LT |
864 | return -EINVAL; |
865 | } | |
866 | ||
3fdadf7d | 867 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 868 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
869 | { |
870 | int err; | |
871 | ||
872 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
873 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
874 | ||
875 | if (level != SOL_IPV6) | |
876 | return -ENOPROTOOPT; | |
877 | ||
878 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
879 | #ifdef CONFIG_NETFILTER | |
880 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
881 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
882 | optname != IPV6_XFRM_POLICY) { | |
883 | lock_sock(sk); | |
884 | err = nf_setsockopt(sk, PF_INET6, optname, optval, | |
885 | optlen); | |
886 | release_sock(sk); | |
887 | } | |
888 | #endif | |
889 | return err; | |
890 | } | |
7159039a | 891 | EXPORT_SYMBOL(ipv6_setsockopt); |
3fdadf7d DM |
892 | |
893 | #ifdef CONFIG_COMPAT | |
894 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
b7058842 | 895 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
896 | { |
897 | int err; | |
898 | ||
899 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
900 | if (udp_prot.compat_setsockopt != NULL) |
901 | return udp_prot.compat_setsockopt(sk, level, optname, | |
902 | optval, optlen); | |
903 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
904 | } |
905 | ||
906 | if (level != SOL_IPV6) | |
907 | return -ENOPROTOOPT; | |
908 | ||
dae50295 DS |
909 | if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) |
910 | return compat_mc_setsockopt(sk, level, optname, optval, optlen, | |
911 | ipv6_setsockopt); | |
912 | ||
3fdadf7d DM |
913 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); |
914 | #ifdef CONFIG_NETFILTER | |
915 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
916 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
543d9cfe | 917 | optname != IPV6_XFRM_POLICY) { |
3fdadf7d | 918 | lock_sock(sk); |
543d9cfe ACM |
919 | err = compat_nf_setsockopt(sk, PF_INET6, optname, |
920 | optval, optlen); | |
3fdadf7d DM |
921 | release_sock(sk); |
922 | } | |
923 | #endif | |
924 | return err; | |
925 | } | |
543d9cfe | 926 | EXPORT_SYMBOL(compat_ipv6_setsockopt); |
3fdadf7d DM |
927 | #endif |
928 | ||
28693079 | 929 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, |
4c6510a7 | 930 | int optname, char __user *optval, int len) |
333fad53 | 931 | { |
28693079 DM |
932 | struct ipv6_opt_hdr *hdr; |
933 | ||
4c6510a7 YH |
934 | if (!opt) |
935 | return 0; | |
936 | ||
67ba4152 | 937 | switch (optname) { |
4c6510a7 YH |
938 | case IPV6_HOPOPTS: |
939 | hdr = opt->hopopt; | |
940 | break; | |
941 | case IPV6_RTHDRDSTOPTS: | |
942 | hdr = opt->dst0opt; | |
943 | break; | |
944 | case IPV6_RTHDR: | |
945 | hdr = (struct ipv6_opt_hdr *)opt->srcrt; | |
946 | break; | |
947 | case IPV6_DSTOPTS: | |
948 | hdr = opt->dst1opt; | |
949 | break; | |
950 | default: | |
951 | return -EINVAL; /* should not happen */ | |
952 | } | |
953 | ||
954 | if (!hdr) | |
333fad53 | 955 | return 0; |
28693079 | 956 | |
d2b02ed9 | 957 | len = min_t(unsigned int, len, ipv6_optlen(hdr)); |
660adc6e | 958 | if (copy_to_user(optval, hdr, len)) |
333fad53 | 959 | return -EFAULT; |
95b496b6 | 960 | return len; |
333fad53 YH |
961 | } |
962 | ||
3fdadf7d | 963 | static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
95c96174 | 964 | char __user *optval, int __user *optlen, unsigned int flags) |
1da177e4 LT |
965 | { |
966 | struct ipv6_pinfo *np = inet6_sk(sk); | |
967 | int len; | |
968 | int val; | |
969 | ||
7bc570c8 YH |
970 | if (ip6_mroute_opt(optname)) |
971 | return ip6_mroute_getsockopt(sk, optname, optval, optlen); | |
972 | ||
1da177e4 LT |
973 | if (get_user(len, optlen)) |
974 | return -EFAULT; | |
975 | switch (optname) { | |
976 | case IPV6_ADDRFORM: | |
977 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 978 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 | 979 | sk->sk_protocol != IPPROTO_TCP) |
1717699c | 980 | return -ENOPROTOOPT; |
1da177e4 LT |
981 | if (sk->sk_state != TCP_ESTABLISHED) |
982 | return -ENOTCONN; | |
983 | val = sk->sk_family; | |
984 | break; | |
985 | case MCAST_MSFILTER: | |
986 | { | |
987 | struct group_filter gsf; | |
988 | int err; | |
989 | ||
990 | if (len < GROUP_FILTER_SIZE(0)) | |
991 | return -EINVAL; | |
992 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
993 | return -EFAULT; | |
20c61fbd YH |
994 | if (gsf.gf_group.ss_family != AF_INET6) |
995 | return -EADDRNOTAVAIL; | |
1da177e4 LT |
996 | lock_sock(sk); |
997 | err = ip6_mc_msfget(sk, &gsf, | |
998 | (struct group_filter __user *)optval, optlen); | |
999 | release_sock(sk); | |
1000 | return err; | |
1001 | } | |
1002 | ||
333fad53 | 1003 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
1004 | { |
1005 | struct msghdr msg; | |
1006 | struct sk_buff *skb; | |
1007 | ||
1008 | if (sk->sk_type != SOCK_STREAM) | |
1009 | return -ENOPROTOOPT; | |
1010 | ||
1011 | msg.msg_control = optval; | |
1012 | msg.msg_controllen = len; | |
98e77438 | 1013 | msg.msg_flags = flags; |
1da177e4 LT |
1014 | |
1015 | lock_sock(sk); | |
1016 | skb = np->pktoptions; | |
1017 | if (skb) | |
4b261c75 | 1018 | ip6_datagram_recv_ctl(sk, &msg, skb); |
1dc7b90f ED |
1019 | release_sock(sk); |
1020 | if (!skb) { | |
1da177e4 LT |
1021 | if (np->rxopt.bits.rxinfo) { |
1022 | struct in6_pktinfo src_info; | |
f250dcda YH |
1023 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
1024 | np->sticky_pktinfo.ipi6_ifindex; | |
efe4208f | 1025 | src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : np->sticky_pktinfo.ipi6_addr; |
1da177e4 LT |
1026 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); |
1027 | } | |
1028 | if (np->rxopt.bits.rxhlim) { | |
1029 | int hlim = np->mcast_hops; | |
1030 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
1031 | } | |
4c507d28 | 1032 | if (np->rxopt.bits.rxtclass) { |
d76ed22b LR |
1033 | int tclass = (int)ip6_tclass(np->rcv_flowinfo); |
1034 | ||
4c507d28 JB |
1035 | put_cmsg(&msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass); |
1036 | } | |
333fad53 YH |
1037 | if (np->rxopt.bits.rxoinfo) { |
1038 | struct in6_pktinfo src_info; | |
f250dcda YH |
1039 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
1040 | np->sticky_pktinfo.ipi6_ifindex; | |
efe4208f ED |
1041 | src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : |
1042 | np->sticky_pktinfo.ipi6_addr; | |
333fad53 YH |
1043 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); |
1044 | } | |
1045 | if (np->rxopt.bits.rxohlim) { | |
1046 | int hlim = np->mcast_hops; | |
1047 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
1048 | } | |
1397ed35 | 1049 | if (np->rxopt.bits.rxflow) { |
68536053 FF |
1050 | __be32 flowinfo = np->rcv_flowinfo; |
1051 | ||
1397ed35 FF |
1052 | put_cmsg(&msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo); |
1053 | } | |
1da177e4 LT |
1054 | } |
1055 | len -= msg.msg_controllen; | |
1056 | return put_user(len, optlen); | |
1057 | } | |
1058 | case IPV6_MTU: | |
1059 | { | |
1060 | struct dst_entry *dst; | |
b6c6712a | 1061 | |
1ab1457c | 1062 | val = 0; |
b6c6712a ED |
1063 | rcu_read_lock(); |
1064 | dst = __sk_dst_get(sk); | |
1065 | if (dst) | |
1da177e4 | 1066 | val = dst_mtu(dst); |
b6c6712a | 1067 | rcu_read_unlock(); |
1da177e4 LT |
1068 | if (!val) |
1069 | return -ENOTCONN; | |
1070 | break; | |
1071 | } | |
1072 | ||
1073 | case IPV6_V6ONLY: | |
9fe516ba | 1074 | val = sk->sk_ipv6only; |
1da177e4 LT |
1075 | break; |
1076 | ||
333fad53 | 1077 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
1078 | val = np->rxopt.bits.rxinfo; |
1079 | break; | |
1080 | ||
333fad53 YH |
1081 | case IPV6_2292PKTINFO: |
1082 | val = np->rxopt.bits.rxoinfo; | |
1083 | break; | |
1084 | ||
1085 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
1086 | val = np->rxopt.bits.rxhlim; |
1087 | break; | |
1088 | ||
333fad53 YH |
1089 | case IPV6_2292HOPLIMIT: |
1090 | val = np->rxopt.bits.rxohlim; | |
1091 | break; | |
1092 | ||
1093 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
1094 | val = np->rxopt.bits.srcrt; |
1095 | break; | |
1096 | ||
333fad53 YH |
1097 | case IPV6_2292RTHDR: |
1098 | val = np->rxopt.bits.osrcrt; | |
1099 | break; | |
1100 | ||
1da177e4 | 1101 | case IPV6_HOPOPTS: |
333fad53 YH |
1102 | case IPV6_RTHDRDSTOPTS: |
1103 | case IPV6_RTHDR: | |
1104 | case IPV6_DSTOPTS: | |
1105 | { | |
1106 | ||
1107 | lock_sock(sk); | |
28693079 | 1108 | len = ipv6_getsockopt_sticky(sk, np->opt, |
4c6510a7 | 1109 | optname, optval, len); |
333fad53 | 1110 | release_sock(sk); |
05335c22 YH |
1111 | /* check if ipv6_getsockopt_sticky() returns err code */ |
1112 | if (len < 0) | |
1113 | return len; | |
333fad53 YH |
1114 | return put_user(len, optlen); |
1115 | } | |
1116 | ||
1117 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
1118 | val = np->rxopt.bits.hopopts; |
1119 | break; | |
1120 | ||
333fad53 YH |
1121 | case IPV6_2292HOPOPTS: |
1122 | val = np->rxopt.bits.ohopopts; | |
1123 | break; | |
1124 | ||
1125 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
1126 | val = np->rxopt.bits.dstopts; |
1127 | break; | |
1128 | ||
333fad53 YH |
1129 | case IPV6_2292DSTOPTS: |
1130 | val = np->rxopt.bits.odstopts; | |
1131 | break; | |
1132 | ||
41a1f8ea YH |
1133 | case IPV6_TCLASS: |
1134 | val = np->tclass; | |
1135 | break; | |
1136 | ||
1137 | case IPV6_RECVTCLASS: | |
1138 | val = np->rxopt.bits.rxtclass; | |
1139 | break; | |
1140 | ||
1da177e4 LT |
1141 | case IPV6_FLOWINFO: |
1142 | val = np->rxopt.bits.rxflow; | |
1143 | break; | |
1144 | ||
793b1473 BH |
1145 | case IPV6_RECVPATHMTU: |
1146 | val = np->rxopt.bits.rxpmtu; | |
1147 | break; | |
1148 | ||
1149 | case IPV6_PATHMTU: | |
1150 | { | |
1151 | struct dst_entry *dst; | |
1152 | struct ip6_mtuinfo mtuinfo; | |
1153 | ||
1154 | if (len < sizeof(mtuinfo)) | |
1155 | return -EINVAL; | |
1156 | ||
1157 | len = sizeof(mtuinfo); | |
1158 | memset(&mtuinfo, 0, sizeof(mtuinfo)); | |
1159 | ||
1160 | rcu_read_lock(); | |
1161 | dst = __sk_dst_get(sk); | |
1162 | if (dst) | |
1163 | mtuinfo.ip6m_mtu = dst_mtu(dst); | |
1164 | rcu_read_unlock(); | |
1165 | if (!mtuinfo.ip6m_mtu) | |
1166 | return -ENOTCONN; | |
1167 | ||
1168 | if (put_user(len, optlen)) | |
1169 | return -EFAULT; | |
1170 | if (copy_to_user(optval, &mtuinfo, len)) | |
1171 | return -EFAULT; | |
1172 | ||
1173 | return 0; | |
793b1473 BH |
1174 | } |
1175 | ||
6c468622 BS |
1176 | case IPV6_TRANSPARENT: |
1177 | val = inet_sk(sk)->transparent; | |
1178 | break; | |
1179 | ||
1180 | case IPV6_RECVORIGDSTADDR: | |
1181 | val = np->rxopt.bits.rxorigdstaddr; | |
1182 | break; | |
1183 | ||
1da177e4 | 1184 | case IPV6_UNICAST_HOPS: |
1da177e4 | 1185 | case IPV6_MULTICAST_HOPS: |
befffe90 BH |
1186 | { |
1187 | struct dst_entry *dst; | |
1188 | ||
1189 | if (optname == IPV6_UNICAST_HOPS) | |
1190 | val = np->hop_limit; | |
1191 | else | |
1192 | val = np->mcast_hops; | |
1193 | ||
b6c6712a ED |
1194 | if (val < 0) { |
1195 | rcu_read_lock(); | |
1196 | dst = __sk_dst_get(sk); | |
1197 | if (dst) | |
6b75d090 | 1198 | val = ip6_dst_hoplimit(dst); |
b6c6712a | 1199 | rcu_read_unlock(); |
befffe90 | 1200 | } |
b6c6712a | 1201 | |
befffe90 | 1202 | if (val < 0) |
53b7997f | 1203 | val = sock_net(sk)->ipv6.devconf_all->hop_limit; |
1da177e4 | 1204 | break; |
befffe90 | 1205 | } |
1da177e4 LT |
1206 | |
1207 | case IPV6_MULTICAST_LOOP: | |
1208 | val = np->mc_loop; | |
1209 | break; | |
1210 | ||
1211 | case IPV6_MULTICAST_IF: | |
1212 | val = np->mcast_oif; | |
1213 | break; | |
1214 | ||
c4062dfc EH |
1215 | case IPV6_UNICAST_IF: |
1216 | val = (__force int)htonl((__u32) np->ucast_oif); | |
1217 | break; | |
1218 | ||
1da177e4 LT |
1219 | case IPV6_MTU_DISCOVER: |
1220 | val = np->pmtudisc; | |
1221 | break; | |
1222 | ||
1223 | case IPV6_RECVERR: | |
1224 | val = np->recverr; | |
1225 | break; | |
1226 | ||
1227 | case IPV6_FLOWINFO_SEND: | |
1228 | val = np->sndflow; | |
1229 | break; | |
1230 | ||
3fdfa5ff FF |
1231 | case IPV6_FLOWLABEL_MGR: |
1232 | { | |
1233 | struct in6_flowlabel_req freq; | |
46e5f401 | 1234 | int flags; |
3fdfa5ff FF |
1235 | |
1236 | if (len < sizeof(freq)) | |
1237 | return -EINVAL; | |
1238 | ||
1239 | if (copy_from_user(&freq, optval, sizeof(freq))) | |
1240 | return -EFAULT; | |
1241 | ||
1242 | if (freq.flr_action != IPV6_FL_A_GET) | |
1243 | return -EINVAL; | |
1244 | ||
1245 | len = sizeof(freq); | |
46e5f401 FF |
1246 | flags = freq.flr_flags; |
1247 | ||
3fdfa5ff FF |
1248 | memset(&freq, 0, sizeof(freq)); |
1249 | ||
46e5f401 | 1250 | val = ipv6_flowlabel_opt_get(sk, &freq, flags); |
3fdfa5ff FF |
1251 | if (val < 0) |
1252 | return val; | |
1253 | ||
1254 | if (put_user(len, optlen)) | |
1255 | return -EFAULT; | |
1256 | if (copy_to_user(optval, &freq, len)) | |
1257 | return -EFAULT; | |
1258 | ||
1259 | return 0; | |
1260 | } | |
1261 | ||
7cbca67c YH |
1262 | case IPV6_ADDR_PREFERENCES: |
1263 | val = 0; | |
1264 | ||
1265 | if (np->srcprefs & IPV6_PREFER_SRC_TMP) | |
1266 | val |= IPV6_PREFER_SRC_TMP; | |
1267 | else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) | |
1268 | val |= IPV6_PREFER_SRC_PUBLIC; | |
1269 | else { | |
1270 | /* XXX: should we return system default? */ | |
1271 | val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; | |
1272 | } | |
1273 | ||
1274 | if (np->srcprefs & IPV6_PREFER_SRC_COA) | |
1275 | val |= IPV6_PREFER_SRC_COA; | |
1276 | else | |
1277 | val |= IPV6_PREFER_SRC_HOME; | |
1278 | break; | |
e802af9c SH |
1279 | |
1280 | case IPV6_MINHOPCOUNT: | |
1281 | val = np->min_hopcount; | |
1282 | break; | |
793b1473 BH |
1283 | |
1284 | case IPV6_DONTFRAG: | |
1285 | val = np->dontfrag; | |
1286 | break; | |
7cbca67c | 1287 | |
cb1ce2ef TH |
1288 | case IPV6_AUTOFLOWLABEL: |
1289 | val = np->autoflowlabel; | |
1290 | break; | |
1291 | ||
1da177e4 | 1292 | default: |
cf6fc4a9 | 1293 | return -ENOPROTOOPT; |
1da177e4 LT |
1294 | } |
1295 | len = min_t(unsigned int, sizeof(int), len); | |
67ba4152 | 1296 | if (put_user(len, optlen)) |
1da177e4 | 1297 | return -EFAULT; |
67ba4152 | 1298 | if (copy_to_user(optval, &val, len)) |
1da177e4 LT |
1299 | return -EFAULT; |
1300 | return 0; | |
1301 | } | |
1302 | ||
3fdadf7d DM |
1303 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1304 | char __user *optval, int __user *optlen) | |
1305 | { | |
1306 | int err; | |
1307 | ||
1308 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
1309 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
1310 | ||
67ba4152 | 1311 | if (level != SOL_IPV6) |
3fdadf7d DM |
1312 | return -ENOPROTOOPT; |
1313 | ||
98e77438 | 1314 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 0); |
3fdadf7d | 1315 | #ifdef CONFIG_NETFILTER |
cf6fc4a9 WY |
1316 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1317 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1318 | int len; |
1319 | ||
1320 | if (get_user(len, optlen)) | |
1321 | return -EFAULT; | |
1322 | ||
1323 | lock_sock(sk); | |
1324 | err = nf_getsockopt(sk, PF_INET6, optname, optval, | |
1325 | &len); | |
1326 | release_sock(sk); | |
1327 | if (err >= 0) | |
1328 | err = put_user(len, optlen); | |
1329 | } | |
1330 | #endif | |
1331 | return err; | |
1332 | } | |
7159039a YH |
1333 | EXPORT_SYMBOL(ipv6_getsockopt); |
1334 | ||
3fdadf7d DM |
1335 | #ifdef CONFIG_COMPAT |
1336 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1337 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
1338 | { |
1339 | int err; | |
1340 | ||
1341 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
1342 | if (udp_prot.compat_getsockopt != NULL) |
1343 | return udp_prot.compat_getsockopt(sk, level, optname, | |
1344 | optval, optlen); | |
1345 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
1346 | } |
1347 | ||
543d9cfe | 1348 | if (level != SOL_IPV6) |
3fdadf7d DM |
1349 | return -ENOPROTOOPT; |
1350 | ||
80991790 PE |
1351 | if (optname == MCAST_MSFILTER) |
1352 | return compat_mc_getsockopt(sk, level, optname, optval, optlen, | |
1353 | ipv6_getsockopt); | |
1354 | ||
98e77438 DB |
1355 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, |
1356 | MSG_CMSG_COMPAT); | |
3fdadf7d | 1357 | #ifdef CONFIG_NETFILTER |
cf6fc4a9 WY |
1358 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1359 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1360 | int len; |
1361 | ||
1362 | if (get_user(len, optlen)) | |
1363 | return -EFAULT; | |
1364 | ||
1365 | lock_sock(sk); | |
543d9cfe ACM |
1366 | err = compat_nf_getsockopt(sk, PF_INET6, |
1367 | optname, optval, &len); | |
3fdadf7d DM |
1368 | release_sock(sk); |
1369 | if (err >= 0) | |
1370 | err = put_user(len, optlen); | |
1371 | } | |
1372 | #endif | |
1373 | return err; | |
1374 | } | |
543d9cfe | 1375 | EXPORT_SYMBOL(compat_ipv6_getsockopt); |
3fdadf7d DM |
1376 | #endif |
1377 |