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 | ||
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: | |
54ff9ef3 MRL |
127 | case MCAST_JOIN_SOURCE_GROUP: |
128 | case MCAST_LEAVE_SOURCE_GROUP: | |
129 | case MCAST_BLOCK_SOURCE: | |
130 | case MCAST_UNBLOCK_SOURCE: | |
131 | case MCAST_MSFILTER: | |
baf606d9 MRL |
132 | return true; |
133 | } | |
134 | return false; | |
135 | } | |
136 | ||
3fdadf7d | 137 | static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 138 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
139 | { |
140 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 141 | struct net *net = sock_net(sk); |
1da177e4 LT |
142 | int val, valbool; |
143 | int retv = -ENOPROTOOPT; | |
baf606d9 | 144 | bool needs_rtnl = setsockopt_needs_rtnl(optname); |
1da177e4 | 145 | |
1da177e4 | 146 | if (optval == NULL) |
67ba4152 | 147 | val = 0; |
b2a9d7c2 YH |
148 | else { |
149 | if (optlen >= sizeof(int)) { | |
150 | if (get_user(val, (int __user *) optval)) | |
151 | return -EFAULT; | |
152 | } else | |
153 | val = 0; | |
154 | } | |
1da177e4 | 155 | |
67ba4152 | 156 | valbool = (val != 0); |
1da177e4 | 157 | |
7bc570c8 YH |
158 | if (ip6_mroute_opt(optname)) |
159 | return ip6_mroute_setsockopt(sk, optname, optval, optlen); | |
160 | ||
baf606d9 MRL |
161 | if (needs_rtnl) |
162 | rtnl_lock(); | |
1da177e4 LT |
163 | lock_sock(sk); |
164 | ||
165 | switch (optname) { | |
166 | ||
167 | case IPV6_ADDRFORM: | |
b2a9d7c2 YH |
168 | if (optlen < sizeof(int)) |
169 | goto e_inval; | |
1da177e4 LT |
170 | if (val == PF_INET) { |
171 | struct ipv6_txoptions *opt; | |
172 | struct sk_buff *pktopt; | |
173 | ||
49d074f4 DL |
174 | if (sk->sk_type == SOCK_RAW) |
175 | break; | |
176 | ||
9596cc82 DL |
177 | if (sk->sk_protocol == IPPROTO_UDP || |
178 | sk->sk_protocol == IPPROTO_UDPLITE) { | |
179 | struct udp_sock *up = udp_sk(sk); | |
180 | if (up->pending == AF_INET6) { | |
181 | retv = -EBUSY; | |
182 | break; | |
183 | } | |
184 | } else if (sk->sk_protocol != IPPROTO_TCP) | |
1da177e4 LT |
185 | break; |
186 | ||
187 | if (sk->sk_state != TCP_ESTABLISHED) { | |
188 | retv = -ENOTCONN; | |
189 | break; | |
190 | } | |
191 | ||
192 | if (ipv6_only_sock(sk) || | |
efe4208f | 193 | !ipv6_addr_v4mapped(&sk->sk_v6_daddr)) { |
1da177e4 LT |
194 | retv = -EADDRNOTAVAIL; |
195 | break; | |
196 | } | |
197 | ||
198 | fl6_free_socklist(sk); | |
199 | ipv6_sock_mc_close(sk); | |
200 | ||
e6848976 ACM |
201 | /* |
202 | * Sock is moving from IPv6 to IPv4 (sk_prot), so | |
203 | * remove it from the refcnt debug socks count in the | |
204 | * original family... | |
205 | */ | |
206 | sk_refcnt_debug_dec(sk); | |
207 | ||
1da177e4 | 208 | if (sk->sk_protocol == IPPROTO_TCP) { |
d83d8461 | 209 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 | 210 | local_bh_disable(); |
c29a0bc4 PE |
211 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
212 | sock_prot_inuse_add(net, &tcp_prot, 1); | |
1da177e4 LT |
213 | local_bh_enable(); |
214 | sk->sk_prot = &tcp_prot; | |
d83d8461 | 215 | icsk->icsk_af_ops = &ipv4_specific; |
1da177e4 LT |
216 | sk->sk_socket->ops = &inet_stream_ops; |
217 | sk->sk_family = PF_INET; | |
d83d8461 | 218 | tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); |
1da177e4 | 219 | } else { |
ba4e58ec GR |
220 | struct proto *prot = &udp_prot; |
221 | ||
db8dac20 | 222 | if (sk->sk_protocol == IPPROTO_UDPLITE) |
ba4e58ec | 223 | prot = &udplite_prot; |
1da177e4 | 224 | local_bh_disable(); |
c29a0bc4 PE |
225 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
226 | sock_prot_inuse_add(net, prot, 1); | |
1da177e4 | 227 | local_bh_enable(); |
ba4e58ec | 228 | sk->sk_prot = prot; |
1da177e4 LT |
229 | sk->sk_socket->ops = &inet_dgram_ops; |
230 | sk->sk_family = PF_INET; | |
231 | } | |
232 | opt = xchg(&np->opt, NULL); | |
233 | if (opt) | |
234 | sock_kfree_s(sk, opt, opt->tot_len); | |
235 | pktopt = xchg(&np->pktoptions, NULL); | |
800d55f1 | 236 | kfree_skb(pktopt); |
1da177e4 LT |
237 | |
238 | sk->sk_destruct = inet_sock_destruct; | |
e6848976 ACM |
239 | /* |
240 | * ... and add it to the refcnt debug socks count | |
241 | * in the new family. -acme | |
242 | */ | |
243 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
244 | module_put(THIS_MODULE); |
245 | retv = 0; | |
246 | break; | |
247 | } | |
248 | goto e_inval; | |
249 | ||
250 | case IPV6_V6ONLY: | |
b2a9d7c2 | 251 | if (optlen < sizeof(int) || |
c720c7e8 | 252 | inet_sk(sk)->inet_num) |
1da177e4 | 253 | goto e_inval; |
9fe516ba | 254 | sk->sk_ipv6only = valbool; |
1da177e4 LT |
255 | retv = 0; |
256 | break; | |
257 | ||
333fad53 | 258 | case IPV6_RECVPKTINFO: |
b2a9d7c2 YH |
259 | if (optlen < sizeof(int)) |
260 | goto e_inval; | |
1da177e4 LT |
261 | np->rxopt.bits.rxinfo = valbool; |
262 | retv = 0; | |
263 | break; | |
1ab1457c | 264 | |
333fad53 | 265 | case IPV6_2292PKTINFO: |
b2a9d7c2 YH |
266 | if (optlen < sizeof(int)) |
267 | goto e_inval; | |
333fad53 YH |
268 | np->rxopt.bits.rxoinfo = valbool; |
269 | retv = 0; | |
270 | break; | |
1da177e4 | 271 | |
333fad53 | 272 | case IPV6_RECVHOPLIMIT: |
b2a9d7c2 YH |
273 | if (optlen < sizeof(int)) |
274 | goto e_inval; | |
1da177e4 LT |
275 | np->rxopt.bits.rxhlim = valbool; |
276 | retv = 0; | |
277 | break; | |
278 | ||
333fad53 | 279 | case IPV6_2292HOPLIMIT: |
b2a9d7c2 YH |
280 | if (optlen < sizeof(int)) |
281 | goto e_inval; | |
333fad53 YH |
282 | np->rxopt.bits.rxohlim = valbool; |
283 | retv = 0; | |
284 | break; | |
285 | ||
286 | case IPV6_RECVRTHDR: | |
b2a9d7c2 YH |
287 | if (optlen < sizeof(int)) |
288 | goto e_inval; | |
4c752098 | 289 | np->rxopt.bits.srcrt = valbool; |
1da177e4 LT |
290 | retv = 0; |
291 | break; | |
292 | ||
333fad53 | 293 | case IPV6_2292RTHDR: |
b2a9d7c2 YH |
294 | if (optlen < sizeof(int)) |
295 | goto e_inval; | |
4c752098 | 296 | np->rxopt.bits.osrcrt = valbool; |
333fad53 YH |
297 | retv = 0; |
298 | break; | |
299 | ||
300 | case IPV6_RECVHOPOPTS: | |
b2a9d7c2 YH |
301 | if (optlen < sizeof(int)) |
302 | goto e_inval; | |
1da177e4 LT |
303 | np->rxopt.bits.hopopts = valbool; |
304 | retv = 0; | |
305 | break; | |
306 | ||
333fad53 | 307 | case IPV6_2292HOPOPTS: |
b2a9d7c2 YH |
308 | if (optlen < sizeof(int)) |
309 | goto e_inval; | |
333fad53 YH |
310 | np->rxopt.bits.ohopopts = valbool; |
311 | retv = 0; | |
312 | break; | |
313 | ||
314 | case IPV6_RECVDSTOPTS: | |
b2a9d7c2 YH |
315 | if (optlen < sizeof(int)) |
316 | goto e_inval; | |
1da177e4 LT |
317 | np->rxopt.bits.dstopts = valbool; |
318 | retv = 0; | |
319 | break; | |
320 | ||
333fad53 | 321 | case IPV6_2292DSTOPTS: |
b2a9d7c2 YH |
322 | if (optlen < sizeof(int)) |
323 | goto e_inval; | |
333fad53 YH |
324 | np->rxopt.bits.odstopts = valbool; |
325 | retv = 0; | |
326 | break; | |
327 | ||
41a1f8ea | 328 | case IPV6_TCLASS: |
b2a9d7c2 YH |
329 | if (optlen < sizeof(int)) |
330 | goto e_inval; | |
d0ee011f | 331 | if (val < -1 || val > 0xff) |
41a1f8ea | 332 | goto e_inval; |
26ced1e4 GR |
333 | /* RFC 3542, 6.5: default traffic class of 0x0 */ |
334 | if (val == -1) | |
335 | val = 0; | |
41a1f8ea YH |
336 | np->tclass = val; |
337 | retv = 0; | |
338 | break; | |
1ab1457c | 339 | |
41a1f8ea | 340 | case IPV6_RECVTCLASS: |
b2a9d7c2 YH |
341 | if (optlen < sizeof(int)) |
342 | goto e_inval; | |
41a1f8ea YH |
343 | np->rxopt.bits.rxtclass = valbool; |
344 | retv = 0; | |
345 | break; | |
346 | ||
1da177e4 | 347 | case IPV6_FLOWINFO: |
b2a9d7c2 YH |
348 | if (optlen < sizeof(int)) |
349 | goto e_inval; | |
1da177e4 LT |
350 | np->rxopt.bits.rxflow = valbool; |
351 | retv = 0; | |
352 | break; | |
353 | ||
793b1473 BH |
354 | case IPV6_RECVPATHMTU: |
355 | if (optlen < sizeof(int)) | |
356 | goto e_inval; | |
357 | np->rxopt.bits.rxpmtu = valbool; | |
358 | retv = 0; | |
359 | break; | |
360 | ||
6c468622 | 361 | case IPV6_TRANSPARENT: |
af31f412 EB |
362 | if (valbool && !ns_capable(net->user_ns, CAP_NET_ADMIN) && |
363 | !ns_capable(net->user_ns, CAP_NET_RAW)) { | |
b889416b BS |
364 | retv = -EPERM; |
365 | break; | |
366 | } | |
6c468622 BS |
367 | if (optlen < sizeof(int)) |
368 | goto e_inval; | |
369 | /* we don't have a separate transparent bit for IPV6 we use the one in the IPv4 socket */ | |
370 | inet_sk(sk)->transparent = valbool; | |
371 | retv = 0; | |
372 | break; | |
373 | ||
374 | case IPV6_RECVORIGDSTADDR: | |
375 | if (optlen < sizeof(int)) | |
376 | goto e_inval; | |
377 | np->rxopt.bits.rxorigdstaddr = valbool; | |
378 | retv = 0; | |
379 | break; | |
380 | ||
333fad53 YH |
381 | case IPV6_HOPOPTS: |
382 | case IPV6_RTHDRDSTOPTS: | |
383 | case IPV6_RTHDR: | |
384 | case IPV6_DSTOPTS: | |
385 | { | |
386 | struct ipv6_txoptions *opt; | |
aea7427f SW |
387 | |
388 | /* remove any sticky options header with a zero option | |
389 | * length, per RFC3542. | |
390 | */ | |
333fad53 | 391 | if (optlen == 0) |
cb422c46 | 392 | optval = NULL; |
cfb266c0 YH |
393 | else if (optval == NULL) |
394 | goto e_inval; | |
aea7427f SW |
395 | else if (optlen < sizeof(struct ipv6_opt_hdr) || |
396 | optlen & 0x7 || optlen > 8 * 255) | |
397 | goto e_inval; | |
333fad53 YH |
398 | |
399 | /* hop-by-hop / destination options are privileged option */ | |
400 | retv = -EPERM; | |
af31f412 | 401 | if (optname != IPV6_RTHDR && !ns_capable(net->user_ns, CAP_NET_RAW)) |
333fad53 YH |
402 | break; |
403 | ||
333fad53 YH |
404 | opt = ipv6_renew_options(sk, np->opt, optname, |
405 | (struct ipv6_opt_hdr __user *)optval, | |
406 | optlen); | |
407 | if (IS_ERR(opt)) { | |
408 | retv = PTR_ERR(opt); | |
409 | break; | |
410 | } | |
411 | ||
412 | /* routing header option needs extra check */ | |
6e093d9d | 413 | retv = -EINVAL; |
dfee0a72 | 414 | if (optname == IPV6_RTHDR && opt && opt->srcrt) { |
333fad53 | 415 | struct ipv6_rt_hdr *rthdr = opt->srcrt; |
280a9d34 | 416 | switch (rthdr->type) { |
07a93626 | 417 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
280a9d34 | 418 | case IPV6_SRCRT_TYPE_2: |
6e093d9d BH |
419 | if (rthdr->hdrlen != 2 || |
420 | rthdr->segments_left != 1) | |
421 | goto sticky_done; | |
422 | ||
280a9d34 | 423 | break; |
bb4dbf9e | 424 | #endif |
280a9d34 | 425 | default: |
333fad53 | 426 | goto sticky_done; |
280a9d34 | 427 | } |
333fad53 YH |
428 | } |
429 | ||
430 | retv = 0; | |
e7712f1a | 431 | opt = ipv6_update_options(sk, opt); |
333fad53 YH |
432 | sticky_done: |
433 | if (opt) | |
434 | sock_kfree_s(sk, opt, opt->tot_len); | |
435 | break; | |
436 | } | |
437 | ||
b24a2516 YH |
438 | case IPV6_PKTINFO: |
439 | { | |
440 | struct in6_pktinfo pkt; | |
441 | ||
442 | if (optlen == 0) | |
443 | goto e_inval; | |
444 | else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL) | |
445 | goto e_inval; | |
446 | ||
914d1164 | 447 | if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) { |
b24a2516 YH |
448 | retv = -EFAULT; |
449 | break; | |
450 | } | |
451 | if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if) | |
452 | goto e_inval; | |
453 | ||
454 | np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex; | |
4e3fd7a0 | 455 | np->sticky_pktinfo.ipi6_addr = pkt.ipi6_addr; |
b24a2516 YH |
456 | retv = 0; |
457 | break; | |
458 | } | |
459 | ||
333fad53 | 460 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
461 | { |
462 | struct ipv6_txoptions *opt = NULL; | |
463 | struct msghdr msg; | |
4c9483b2 | 464 | struct flowi6 fl6; |
1da177e4 LT |
465 | int junk; |
466 | ||
4c9483b2 DM |
467 | memset(&fl6, 0, sizeof(fl6)); |
468 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
469 | fl6.flowi6_mark = sk->sk_mark; | |
1da177e4 LT |
470 | |
471 | if (optlen == 0) | |
472 | goto update; | |
473 | ||
474 | /* 1K is probably excessive | |
475 | * 1K is surely not enough, 2K per standard header is 16K. | |
476 | */ | |
477 | retv = -EINVAL; | |
478 | if (optlen > 64*1024) | |
479 | break; | |
480 | ||
481 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
482 | retv = -ENOBUFS; | |
483 | if (opt == NULL) | |
484 | break; | |
485 | ||
486 | memset(opt, 0, sizeof(*opt)); | |
487 | opt->tot_len = sizeof(*opt) + optlen; | |
488 | retv = -EFAULT; | |
489 | if (copy_from_user(opt+1, optval, optlen)) | |
490 | goto done; | |
491 | ||
492 | msg.msg_controllen = optlen; | |
67ba4152 | 493 | msg.msg_control = (void *)(opt+1); |
1da177e4 | 494 | |
73df66f8 TP |
495 | retv = ip6_datagram_send_ctl(net, sk, &msg, &fl6, opt, &junk, |
496 | &junk, &junk); | |
1da177e4 LT |
497 | if (retv) |
498 | goto done; | |
499 | update: | |
500 | retv = 0; | |
e7712f1a | 501 | opt = ipv6_update_options(sk, opt); |
1da177e4 LT |
502 | done: |
503 | if (opt) | |
504 | sock_kfree_s(sk, opt, opt->tot_len); | |
505 | break; | |
506 | } | |
507 | case IPV6_UNICAST_HOPS: | |
b2a9d7c2 YH |
508 | if (optlen < sizeof(int)) |
509 | goto e_inval; | |
1da177e4 LT |
510 | if (val > 255 || val < -1) |
511 | goto e_inval; | |
512 | np->hop_limit = val; | |
513 | retv = 0; | |
514 | break; | |
515 | ||
516 | case IPV6_MULTICAST_HOPS: | |
517 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 518 | break; |
b2a9d7c2 YH |
519 | if (optlen < sizeof(int)) |
520 | goto e_inval; | |
1da177e4 LT |
521 | if (val > 255 || val < -1) |
522 | goto e_inval; | |
2a38e6d5 | 523 | np->mcast_hops = (val == -1 ? IPV6_DEFAULT_MCASTHOPS : val); |
1da177e4 LT |
524 | retv = 0; |
525 | break; | |
526 | ||
527 | case IPV6_MULTICAST_LOOP: | |
b2a9d7c2 YH |
528 | if (optlen < sizeof(int)) |
529 | goto e_inval; | |
28d44882 YH |
530 | if (val != valbool) |
531 | goto e_inval; | |
1da177e4 LT |
532 | np->mc_loop = valbool; |
533 | retv = 0; | |
534 | break; | |
535 | ||
c4062dfc EH |
536 | case IPV6_UNICAST_IF: |
537 | { | |
538 | struct net_device *dev = NULL; | |
539 | int ifindex; | |
540 | ||
541 | if (optlen != sizeof(int)) | |
542 | goto e_inval; | |
543 | ||
544 | ifindex = (__force int)ntohl((__force __be32)val); | |
545 | if (ifindex == 0) { | |
546 | np->ucast_oif = 0; | |
547 | retv = 0; | |
548 | break; | |
549 | } | |
550 | ||
551 | dev = dev_get_by_index(net, ifindex); | |
552 | retv = -EADDRNOTAVAIL; | |
553 | if (!dev) | |
554 | break; | |
555 | dev_put(dev); | |
556 | ||
557 | retv = -EINVAL; | |
558 | if (sk->sk_bound_dev_if) | |
559 | break; | |
560 | ||
561 | np->ucast_oif = ifindex; | |
562 | retv = 0; | |
563 | break; | |
564 | } | |
565 | ||
1da177e4 LT |
566 | case IPV6_MULTICAST_IF: |
567 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 568 | break; |
b2a9d7c2 YH |
569 | if (optlen < sizeof(int)) |
570 | goto e_inval; | |
1da177e4 | 571 | |
4953f0fc | 572 | if (val) { |
55b80503 ED |
573 | struct net_device *dev; |
574 | ||
4953f0fc BH |
575 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) |
576 | goto e_inval; | |
577 | ||
55b80503 ED |
578 | dev = dev_get_by_index(net, val); |
579 | if (!dev) { | |
4953f0fc BH |
580 | retv = -ENODEV; |
581 | break; | |
582 | } | |
55b80503 | 583 | dev_put(dev); |
1da177e4 LT |
584 | } |
585 | np->mcast_oif = val; | |
586 | retv = 0; | |
587 | break; | |
588 | case IPV6_ADD_MEMBERSHIP: | |
589 | case IPV6_DROP_MEMBERSHIP: | |
590 | { | |
591 | struct ipv6_mreq mreq; | |
592 | ||
a28398ba WC |
593 | if (optlen < sizeof(struct ipv6_mreq)) |
594 | goto e_inval; | |
595 | ||
a96fb49b FL |
596 | retv = -EPROTO; |
597 | if (inet_sk(sk)->is_icsk) | |
598 | break; | |
599 | ||
1da177e4 LT |
600 | retv = -EFAULT; |
601 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
602 | break; | |
603 | ||
604 | if (optname == IPV6_ADD_MEMBERSHIP) | |
54ff9ef3 | 605 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); |
1da177e4 | 606 | else |
54ff9ef3 | 607 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); |
1da177e4 LT |
608 | break; |
609 | } | |
610 | case IPV6_JOIN_ANYCAST: | |
611 | case IPV6_LEAVE_ANYCAST: | |
612 | { | |
613 | struct ipv6_mreq mreq; | |
614 | ||
a28398ba | 615 | if (optlen < sizeof(struct ipv6_mreq)) |
1da177e4 LT |
616 | goto e_inval; |
617 | ||
618 | retv = -EFAULT; | |
619 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
620 | break; | |
621 | ||
622 | if (optname == IPV6_JOIN_ANYCAST) | |
623 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
624 | else | |
625 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
626 | break; | |
627 | } | |
628 | case MCAST_JOIN_GROUP: | |
629 | case MCAST_LEAVE_GROUP: | |
630 | { | |
631 | struct group_req greq; | |
632 | struct sockaddr_in6 *psin6; | |
633 | ||
a28398ba WC |
634 | if (optlen < sizeof(struct group_req)) |
635 | goto e_inval; | |
636 | ||
1da177e4 LT |
637 | retv = -EFAULT; |
638 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
639 | break; | |
640 | if (greq.gr_group.ss_family != AF_INET6) { | |
641 | retv = -EADDRNOTAVAIL; | |
642 | break; | |
643 | } | |
644 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
645 | if (optname == MCAST_JOIN_GROUP) | |
54ff9ef3 MRL |
646 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, |
647 | &psin6->sin6_addr); | |
1da177e4 | 648 | else |
54ff9ef3 MRL |
649 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, |
650 | &psin6->sin6_addr); | |
1da177e4 LT |
651 | break; |
652 | } | |
653 | case MCAST_JOIN_SOURCE_GROUP: | |
654 | case MCAST_LEAVE_SOURCE_GROUP: | |
655 | case MCAST_BLOCK_SOURCE: | |
656 | case MCAST_UNBLOCK_SOURCE: | |
657 | { | |
658 | struct group_source_req greqs; | |
659 | int omode, add; | |
660 | ||
a28398ba | 661 | if (optlen < sizeof(struct group_source_req)) |
1da177e4 LT |
662 | goto e_inval; |
663 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
664 | retv = -EFAULT; | |
665 | break; | |
666 | } | |
667 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
668 | greqs.gsr_source.ss_family != AF_INET6) { | |
669 | retv = -EADDRNOTAVAIL; | |
670 | break; | |
671 | } | |
672 | if (optname == MCAST_BLOCK_SOURCE) { | |
673 | omode = MCAST_EXCLUDE; | |
674 | add = 1; | |
675 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
676 | omode = MCAST_EXCLUDE; | |
677 | add = 0; | |
678 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
679 | struct sockaddr_in6 *psin6; | |
680 | ||
681 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
54ff9ef3 MRL |
682 | retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, |
683 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
684 | /* prior join w/ different source is ok */ |
685 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
686 | break; |
687 | omode = MCAST_INCLUDE; | |
688 | add = 1; | |
c9e3e8b6 | 689 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
690 | omode = MCAST_INCLUDE; |
691 | add = 0; | |
692 | } | |
693 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
694 | break; | |
695 | } | |
696 | case MCAST_MSFILTER: | |
697 | { | |
1da177e4 LT |
698 | struct group_filter *gsf; |
699 | ||
700 | if (optlen < GROUP_FILTER_SIZE(0)) | |
701 | goto e_inval; | |
702 | if (optlen > sysctl_optmem_max) { | |
703 | retv = -ENOBUFS; | |
704 | break; | |
705 | } | |
67ba4152 | 706 | gsf = kmalloc(optlen, GFP_KERNEL); |
cfcabdcc | 707 | if (!gsf) { |
1da177e4 LT |
708 | retv = -ENOBUFS; |
709 | break; | |
710 | } | |
711 | retv = -EFAULT; | |
712 | if (copy_from_user(gsf, optval, optlen)) { | |
713 | kfree(gsf); | |
714 | break; | |
715 | } | |
716 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
717 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
718 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
719 | kfree(gsf); | |
720 | retv = -ENOBUFS; | |
721 | break; | |
722 | } | |
723 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
724 | kfree(gsf); | |
725 | retv = -EINVAL; | |
726 | break; | |
727 | } | |
728 | retv = ip6_mc_msfilter(sk, gsf); | |
729 | kfree(gsf); | |
730 | ||
731 | break; | |
732 | } | |
733 | case IPV6_ROUTER_ALERT: | |
b2a9d7c2 YH |
734 | if (optlen < sizeof(int)) |
735 | goto e_inval; | |
725a8ff0 | 736 | retv = ip6_ra_control(sk, val); |
1da177e4 LT |
737 | break; |
738 | case IPV6_MTU_DISCOVER: | |
b2a9d7c2 YH |
739 | if (optlen < sizeof(int)) |
740 | goto e_inval; | |
0b95227a | 741 | if (val < IPV6_PMTUDISC_DONT || val > IPV6_PMTUDISC_OMIT) |
1da177e4 LT |
742 | goto e_inval; |
743 | np->pmtudisc = val; | |
744 | retv = 0; | |
745 | break; | |
746 | case IPV6_MTU: | |
b2a9d7c2 YH |
747 | if (optlen < sizeof(int)) |
748 | goto e_inval; | |
1da177e4 LT |
749 | if (val && val < IPV6_MIN_MTU) |
750 | goto e_inval; | |
751 | np->frag_size = val; | |
752 | retv = 0; | |
753 | break; | |
754 | case IPV6_RECVERR: | |
b2a9d7c2 YH |
755 | if (optlen < sizeof(int)) |
756 | goto e_inval; | |
1da177e4 LT |
757 | np->recverr = valbool; |
758 | if (!val) | |
759 | skb_queue_purge(&sk->sk_error_queue); | |
760 | retv = 0; | |
761 | break; | |
762 | case IPV6_FLOWINFO_SEND: | |
b2a9d7c2 YH |
763 | if (optlen < sizeof(int)) |
764 | goto e_inval; | |
1da177e4 LT |
765 | np->sndflow = valbool; |
766 | retv = 0; | |
767 | break; | |
768 | case IPV6_FLOWLABEL_MGR: | |
769 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
770 | break; | |
771 | case IPV6_IPSEC_POLICY: | |
772 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 | 773 | retv = -EPERM; |
af31f412 | 774 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
6fc0b4a7 | 775 | break; |
1da177e4 LT |
776 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
777 | break; | |
778 | ||
7cbca67c YH |
779 | case IPV6_ADDR_PREFERENCES: |
780 | { | |
781 | unsigned int pref = 0; | |
782 | unsigned int prefmask = ~0; | |
783 | ||
b2a9d7c2 YH |
784 | if (optlen < sizeof(int)) |
785 | goto e_inval; | |
786 | ||
7cbca67c YH |
787 | retv = -EINVAL; |
788 | ||
789 | /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ | |
790 | switch (val & (IPV6_PREFER_SRC_PUBLIC| | |
791 | IPV6_PREFER_SRC_TMP| | |
792 | IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { | |
793 | case IPV6_PREFER_SRC_PUBLIC: | |
794 | pref |= IPV6_PREFER_SRC_PUBLIC; | |
795 | break; | |
796 | case IPV6_PREFER_SRC_TMP: | |
797 | pref |= IPV6_PREFER_SRC_TMP; | |
798 | break; | |
799 | case IPV6_PREFER_SRC_PUBTMP_DEFAULT: | |
800 | break; | |
801 | case 0: | |
802 | goto pref_skip_pubtmp; | |
803 | default: | |
804 | goto e_inval; | |
805 | } | |
806 | ||
807 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| | |
808 | IPV6_PREFER_SRC_TMP); | |
809 | pref_skip_pubtmp: | |
810 | ||
811 | /* check HOME/COA conflicts */ | |
812 | switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { | |
813 | case IPV6_PREFER_SRC_HOME: | |
814 | break; | |
815 | case IPV6_PREFER_SRC_COA: | |
816 | pref |= IPV6_PREFER_SRC_COA; | |
817 | case 0: | |
818 | goto pref_skip_coa; | |
819 | default: | |
820 | goto e_inval; | |
821 | } | |
822 | ||
823 | prefmask &= ~IPV6_PREFER_SRC_COA; | |
824 | pref_skip_coa: | |
825 | ||
826 | /* check CGA/NONCGA conflicts */ | |
827 | switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { | |
828 | case IPV6_PREFER_SRC_CGA: | |
829 | case IPV6_PREFER_SRC_NONCGA: | |
830 | case 0: | |
831 | break; | |
832 | default: | |
833 | goto e_inval; | |
834 | } | |
835 | ||
836 | np->srcprefs = (np->srcprefs & prefmask) | pref; | |
837 | retv = 0; | |
838 | ||
839 | break; | |
840 | } | |
e802af9c SH |
841 | case IPV6_MINHOPCOUNT: |
842 | if (optlen < sizeof(int)) | |
843 | goto e_inval; | |
844 | if (val < 0 || val > 255) | |
845 | goto e_inval; | |
846 | np->min_hopcount = val; | |
d4596bad | 847 | retv = 0; |
793b1473 BH |
848 | break; |
849 | case IPV6_DONTFRAG: | |
850 | np->dontfrag = valbool; | |
e802af9c SH |
851 | retv = 0; |
852 | break; | |
cb1ce2ef TH |
853 | case IPV6_AUTOFLOWLABEL: |
854 | np->autoflowlabel = valbool; | |
855 | retv = 0; | |
856 | break; | |
1da177e4 | 857 | } |
7cbca67c | 858 | |
1da177e4 | 859 | release_sock(sk); |
baf606d9 MRL |
860 | if (needs_rtnl) |
861 | rtnl_unlock(); | |
1da177e4 | 862 | |
1da177e4 LT |
863 | return retv; |
864 | ||
865 | e_inval: | |
866 | release_sock(sk); | |
baf606d9 MRL |
867 | if (needs_rtnl) |
868 | rtnl_unlock(); | |
1da177e4 LT |
869 | return -EINVAL; |
870 | } | |
871 | ||
3fdadf7d | 872 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 873 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
874 | { |
875 | int err; | |
876 | ||
877 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
878 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
879 | ||
880 | if (level != SOL_IPV6) | |
881 | return -ENOPROTOOPT; | |
882 | ||
883 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
884 | #ifdef CONFIG_NETFILTER | |
885 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
886 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
887 | optname != IPV6_XFRM_POLICY) { | |
888 | lock_sock(sk); | |
889 | err = nf_setsockopt(sk, PF_INET6, optname, optval, | |
890 | optlen); | |
891 | release_sock(sk); | |
892 | } | |
893 | #endif | |
894 | return err; | |
895 | } | |
7159039a | 896 | EXPORT_SYMBOL(ipv6_setsockopt); |
3fdadf7d DM |
897 | |
898 | #ifdef CONFIG_COMPAT | |
899 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
b7058842 | 900 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
901 | { |
902 | int err; | |
903 | ||
904 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
905 | if (udp_prot.compat_setsockopt != NULL) |
906 | return udp_prot.compat_setsockopt(sk, level, optname, | |
907 | optval, optlen); | |
908 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
909 | } |
910 | ||
911 | if (level != SOL_IPV6) | |
912 | return -ENOPROTOOPT; | |
913 | ||
dae50295 DS |
914 | if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) |
915 | return compat_mc_setsockopt(sk, level, optname, optval, optlen, | |
916 | ipv6_setsockopt); | |
917 | ||
3fdadf7d DM |
918 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); |
919 | #ifdef CONFIG_NETFILTER | |
920 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
921 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
543d9cfe | 922 | optname != IPV6_XFRM_POLICY) { |
3fdadf7d | 923 | lock_sock(sk); |
543d9cfe ACM |
924 | err = compat_nf_setsockopt(sk, PF_INET6, optname, |
925 | optval, optlen); | |
3fdadf7d DM |
926 | release_sock(sk); |
927 | } | |
928 | #endif | |
929 | return err; | |
930 | } | |
543d9cfe | 931 | EXPORT_SYMBOL(compat_ipv6_setsockopt); |
3fdadf7d DM |
932 | #endif |
933 | ||
28693079 | 934 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, |
4c6510a7 | 935 | int optname, char __user *optval, int len) |
333fad53 | 936 | { |
28693079 DM |
937 | struct ipv6_opt_hdr *hdr; |
938 | ||
4c6510a7 YH |
939 | if (!opt) |
940 | return 0; | |
941 | ||
67ba4152 | 942 | switch (optname) { |
4c6510a7 YH |
943 | case IPV6_HOPOPTS: |
944 | hdr = opt->hopopt; | |
945 | break; | |
946 | case IPV6_RTHDRDSTOPTS: | |
947 | hdr = opt->dst0opt; | |
948 | break; | |
949 | case IPV6_RTHDR: | |
950 | hdr = (struct ipv6_opt_hdr *)opt->srcrt; | |
951 | break; | |
952 | case IPV6_DSTOPTS: | |
953 | hdr = opt->dst1opt; | |
954 | break; | |
955 | default: | |
956 | return -EINVAL; /* should not happen */ | |
957 | } | |
958 | ||
959 | if (!hdr) | |
333fad53 | 960 | return 0; |
28693079 | 961 | |
d2b02ed9 | 962 | len = min_t(unsigned int, len, ipv6_optlen(hdr)); |
660adc6e | 963 | if (copy_to_user(optval, hdr, len)) |
333fad53 | 964 | return -EFAULT; |
95b496b6 | 965 | return len; |
333fad53 YH |
966 | } |
967 | ||
3fdadf7d | 968 | static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
95c96174 | 969 | char __user *optval, int __user *optlen, unsigned int flags) |
1da177e4 LT |
970 | { |
971 | struct ipv6_pinfo *np = inet6_sk(sk); | |
972 | int len; | |
973 | int val; | |
974 | ||
7bc570c8 YH |
975 | if (ip6_mroute_opt(optname)) |
976 | return ip6_mroute_getsockopt(sk, optname, optval, optlen); | |
977 | ||
1da177e4 LT |
978 | if (get_user(len, optlen)) |
979 | return -EFAULT; | |
980 | switch (optname) { | |
981 | case IPV6_ADDRFORM: | |
982 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 983 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 | 984 | sk->sk_protocol != IPPROTO_TCP) |
1717699c | 985 | return -ENOPROTOOPT; |
1da177e4 LT |
986 | if (sk->sk_state != TCP_ESTABLISHED) |
987 | return -ENOTCONN; | |
988 | val = sk->sk_family; | |
989 | break; | |
990 | case MCAST_MSFILTER: | |
991 | { | |
992 | struct group_filter gsf; | |
993 | int err; | |
994 | ||
995 | if (len < GROUP_FILTER_SIZE(0)) | |
996 | return -EINVAL; | |
997 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
998 | return -EFAULT; | |
20c61fbd YH |
999 | if (gsf.gf_group.ss_family != AF_INET6) |
1000 | return -EADDRNOTAVAIL; | |
1da177e4 LT |
1001 | lock_sock(sk); |
1002 | err = ip6_mc_msfget(sk, &gsf, | |
1003 | (struct group_filter __user *)optval, optlen); | |
1004 | release_sock(sk); | |
1005 | return err; | |
1006 | } | |
1007 | ||
333fad53 | 1008 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
1009 | { |
1010 | struct msghdr msg; | |
1011 | struct sk_buff *skb; | |
1012 | ||
1013 | if (sk->sk_type != SOCK_STREAM) | |
1014 | return -ENOPROTOOPT; | |
1015 | ||
1016 | msg.msg_control = optval; | |
1017 | msg.msg_controllen = len; | |
98e77438 | 1018 | msg.msg_flags = flags; |
1da177e4 LT |
1019 | |
1020 | lock_sock(sk); | |
1021 | skb = np->pktoptions; | |
1022 | if (skb) | |
4b261c75 | 1023 | ip6_datagram_recv_ctl(sk, &msg, skb); |
1dc7b90f ED |
1024 | release_sock(sk); |
1025 | if (!skb) { | |
1da177e4 LT |
1026 | if (np->rxopt.bits.rxinfo) { |
1027 | struct in6_pktinfo src_info; | |
f250dcda YH |
1028 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
1029 | np->sticky_pktinfo.ipi6_ifindex; | |
efe4208f | 1030 | src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : np->sticky_pktinfo.ipi6_addr; |
1da177e4 LT |
1031 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); |
1032 | } | |
1033 | if (np->rxopt.bits.rxhlim) { | |
1034 | int hlim = np->mcast_hops; | |
1035 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
1036 | } | |
4c507d28 | 1037 | if (np->rxopt.bits.rxtclass) { |
d76ed22b LR |
1038 | int tclass = (int)ip6_tclass(np->rcv_flowinfo); |
1039 | ||
4c507d28 JB |
1040 | put_cmsg(&msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass); |
1041 | } | |
333fad53 YH |
1042 | if (np->rxopt.bits.rxoinfo) { |
1043 | struct in6_pktinfo src_info; | |
f250dcda YH |
1044 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
1045 | np->sticky_pktinfo.ipi6_ifindex; | |
efe4208f ED |
1046 | src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : |
1047 | np->sticky_pktinfo.ipi6_addr; | |
333fad53 YH |
1048 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); |
1049 | } | |
1050 | if (np->rxopt.bits.rxohlim) { | |
1051 | int hlim = np->mcast_hops; | |
1052 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
1053 | } | |
1397ed35 | 1054 | if (np->rxopt.bits.rxflow) { |
68536053 FF |
1055 | __be32 flowinfo = np->rcv_flowinfo; |
1056 | ||
1397ed35 FF |
1057 | put_cmsg(&msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo); |
1058 | } | |
1da177e4 LT |
1059 | } |
1060 | len -= msg.msg_controllen; | |
1061 | return put_user(len, optlen); | |
1062 | } | |
1063 | case IPV6_MTU: | |
1064 | { | |
1065 | struct dst_entry *dst; | |
b6c6712a | 1066 | |
1ab1457c | 1067 | val = 0; |
b6c6712a ED |
1068 | rcu_read_lock(); |
1069 | dst = __sk_dst_get(sk); | |
1070 | if (dst) | |
1da177e4 | 1071 | val = dst_mtu(dst); |
b6c6712a | 1072 | rcu_read_unlock(); |
1da177e4 LT |
1073 | if (!val) |
1074 | return -ENOTCONN; | |
1075 | break; | |
1076 | } | |
1077 | ||
1078 | case IPV6_V6ONLY: | |
9fe516ba | 1079 | val = sk->sk_ipv6only; |
1da177e4 LT |
1080 | break; |
1081 | ||
333fad53 | 1082 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
1083 | val = np->rxopt.bits.rxinfo; |
1084 | break; | |
1085 | ||
333fad53 YH |
1086 | case IPV6_2292PKTINFO: |
1087 | val = np->rxopt.bits.rxoinfo; | |
1088 | break; | |
1089 | ||
1090 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
1091 | val = np->rxopt.bits.rxhlim; |
1092 | break; | |
1093 | ||
333fad53 YH |
1094 | case IPV6_2292HOPLIMIT: |
1095 | val = np->rxopt.bits.rxohlim; | |
1096 | break; | |
1097 | ||
1098 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
1099 | val = np->rxopt.bits.srcrt; |
1100 | break; | |
1101 | ||
333fad53 YH |
1102 | case IPV6_2292RTHDR: |
1103 | val = np->rxopt.bits.osrcrt; | |
1104 | break; | |
1105 | ||
1da177e4 | 1106 | case IPV6_HOPOPTS: |
333fad53 YH |
1107 | case IPV6_RTHDRDSTOPTS: |
1108 | case IPV6_RTHDR: | |
1109 | case IPV6_DSTOPTS: | |
1110 | { | |
1111 | ||
1112 | lock_sock(sk); | |
28693079 | 1113 | len = ipv6_getsockopt_sticky(sk, np->opt, |
4c6510a7 | 1114 | optname, optval, len); |
333fad53 | 1115 | release_sock(sk); |
05335c22 YH |
1116 | /* check if ipv6_getsockopt_sticky() returns err code */ |
1117 | if (len < 0) | |
1118 | return len; | |
333fad53 YH |
1119 | return put_user(len, optlen); |
1120 | } | |
1121 | ||
1122 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
1123 | val = np->rxopt.bits.hopopts; |
1124 | break; | |
1125 | ||
333fad53 YH |
1126 | case IPV6_2292HOPOPTS: |
1127 | val = np->rxopt.bits.ohopopts; | |
1128 | break; | |
1129 | ||
1130 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
1131 | val = np->rxopt.bits.dstopts; |
1132 | break; | |
1133 | ||
333fad53 YH |
1134 | case IPV6_2292DSTOPTS: |
1135 | val = np->rxopt.bits.odstopts; | |
1136 | break; | |
1137 | ||
41a1f8ea YH |
1138 | case IPV6_TCLASS: |
1139 | val = np->tclass; | |
1140 | break; | |
1141 | ||
1142 | case IPV6_RECVTCLASS: | |
1143 | val = np->rxopt.bits.rxtclass; | |
1144 | break; | |
1145 | ||
1da177e4 LT |
1146 | case IPV6_FLOWINFO: |
1147 | val = np->rxopt.bits.rxflow; | |
1148 | break; | |
1149 | ||
793b1473 BH |
1150 | case IPV6_RECVPATHMTU: |
1151 | val = np->rxopt.bits.rxpmtu; | |
1152 | break; | |
1153 | ||
1154 | case IPV6_PATHMTU: | |
1155 | { | |
1156 | struct dst_entry *dst; | |
1157 | struct ip6_mtuinfo mtuinfo; | |
1158 | ||
1159 | if (len < sizeof(mtuinfo)) | |
1160 | return -EINVAL; | |
1161 | ||
1162 | len = sizeof(mtuinfo); | |
1163 | memset(&mtuinfo, 0, sizeof(mtuinfo)); | |
1164 | ||
1165 | rcu_read_lock(); | |
1166 | dst = __sk_dst_get(sk); | |
1167 | if (dst) | |
1168 | mtuinfo.ip6m_mtu = dst_mtu(dst); | |
1169 | rcu_read_unlock(); | |
1170 | if (!mtuinfo.ip6m_mtu) | |
1171 | return -ENOTCONN; | |
1172 | ||
1173 | if (put_user(len, optlen)) | |
1174 | return -EFAULT; | |
1175 | if (copy_to_user(optval, &mtuinfo, len)) | |
1176 | return -EFAULT; | |
1177 | ||
1178 | return 0; | |
793b1473 BH |
1179 | } |
1180 | ||
6c468622 BS |
1181 | case IPV6_TRANSPARENT: |
1182 | val = inet_sk(sk)->transparent; | |
1183 | break; | |
1184 | ||
1185 | case IPV6_RECVORIGDSTADDR: | |
1186 | val = np->rxopt.bits.rxorigdstaddr; | |
1187 | break; | |
1188 | ||
1da177e4 | 1189 | case IPV6_UNICAST_HOPS: |
1da177e4 | 1190 | case IPV6_MULTICAST_HOPS: |
befffe90 BH |
1191 | { |
1192 | struct dst_entry *dst; | |
1193 | ||
1194 | if (optname == IPV6_UNICAST_HOPS) | |
1195 | val = np->hop_limit; | |
1196 | else | |
1197 | val = np->mcast_hops; | |
1198 | ||
b6c6712a ED |
1199 | if (val < 0) { |
1200 | rcu_read_lock(); | |
1201 | dst = __sk_dst_get(sk); | |
1202 | if (dst) | |
6b75d090 | 1203 | val = ip6_dst_hoplimit(dst); |
b6c6712a | 1204 | rcu_read_unlock(); |
befffe90 | 1205 | } |
b6c6712a | 1206 | |
befffe90 | 1207 | if (val < 0) |
53b7997f | 1208 | val = sock_net(sk)->ipv6.devconf_all->hop_limit; |
1da177e4 | 1209 | break; |
befffe90 | 1210 | } |
1da177e4 LT |
1211 | |
1212 | case IPV6_MULTICAST_LOOP: | |
1213 | val = np->mc_loop; | |
1214 | break; | |
1215 | ||
1216 | case IPV6_MULTICAST_IF: | |
1217 | val = np->mcast_oif; | |
1218 | break; | |
1219 | ||
c4062dfc EH |
1220 | case IPV6_UNICAST_IF: |
1221 | val = (__force int)htonl((__u32) np->ucast_oif); | |
1222 | break; | |
1223 | ||
1da177e4 LT |
1224 | case IPV6_MTU_DISCOVER: |
1225 | val = np->pmtudisc; | |
1226 | break; | |
1227 | ||
1228 | case IPV6_RECVERR: | |
1229 | val = np->recverr; | |
1230 | break; | |
1231 | ||
1232 | case IPV6_FLOWINFO_SEND: | |
1233 | val = np->sndflow; | |
1234 | break; | |
1235 | ||
3fdfa5ff FF |
1236 | case IPV6_FLOWLABEL_MGR: |
1237 | { | |
1238 | struct in6_flowlabel_req freq; | |
46e5f401 | 1239 | int flags; |
3fdfa5ff FF |
1240 | |
1241 | if (len < sizeof(freq)) | |
1242 | return -EINVAL; | |
1243 | ||
1244 | if (copy_from_user(&freq, optval, sizeof(freq))) | |
1245 | return -EFAULT; | |
1246 | ||
1247 | if (freq.flr_action != IPV6_FL_A_GET) | |
1248 | return -EINVAL; | |
1249 | ||
1250 | len = sizeof(freq); | |
46e5f401 FF |
1251 | flags = freq.flr_flags; |
1252 | ||
3fdfa5ff FF |
1253 | memset(&freq, 0, sizeof(freq)); |
1254 | ||
46e5f401 | 1255 | val = ipv6_flowlabel_opt_get(sk, &freq, flags); |
3fdfa5ff FF |
1256 | if (val < 0) |
1257 | return val; | |
1258 | ||
1259 | if (put_user(len, optlen)) | |
1260 | return -EFAULT; | |
1261 | if (copy_to_user(optval, &freq, len)) | |
1262 | return -EFAULT; | |
1263 | ||
1264 | return 0; | |
1265 | } | |
1266 | ||
7cbca67c YH |
1267 | case IPV6_ADDR_PREFERENCES: |
1268 | val = 0; | |
1269 | ||
1270 | if (np->srcprefs & IPV6_PREFER_SRC_TMP) | |
1271 | val |= IPV6_PREFER_SRC_TMP; | |
1272 | else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) | |
1273 | val |= IPV6_PREFER_SRC_PUBLIC; | |
1274 | else { | |
1275 | /* XXX: should we return system default? */ | |
1276 | val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; | |
1277 | } | |
1278 | ||
1279 | if (np->srcprefs & IPV6_PREFER_SRC_COA) | |
1280 | val |= IPV6_PREFER_SRC_COA; | |
1281 | else | |
1282 | val |= IPV6_PREFER_SRC_HOME; | |
1283 | break; | |
e802af9c SH |
1284 | |
1285 | case IPV6_MINHOPCOUNT: | |
1286 | val = np->min_hopcount; | |
1287 | break; | |
793b1473 BH |
1288 | |
1289 | case IPV6_DONTFRAG: | |
1290 | val = np->dontfrag; | |
1291 | break; | |
7cbca67c | 1292 | |
cb1ce2ef TH |
1293 | case IPV6_AUTOFLOWLABEL: |
1294 | val = np->autoflowlabel; | |
1295 | break; | |
1296 | ||
1da177e4 | 1297 | default: |
cf6fc4a9 | 1298 | return -ENOPROTOOPT; |
1da177e4 LT |
1299 | } |
1300 | len = min_t(unsigned int, sizeof(int), len); | |
67ba4152 | 1301 | if (put_user(len, optlen)) |
1da177e4 | 1302 | return -EFAULT; |
67ba4152 | 1303 | if (copy_to_user(optval, &val, len)) |
1da177e4 LT |
1304 | return -EFAULT; |
1305 | return 0; | |
1306 | } | |
1307 | ||
3fdadf7d DM |
1308 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1309 | char __user *optval, int __user *optlen) | |
1310 | { | |
1311 | int err; | |
1312 | ||
1313 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
1314 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
1315 | ||
67ba4152 | 1316 | if (level != SOL_IPV6) |
3fdadf7d DM |
1317 | return -ENOPROTOOPT; |
1318 | ||
98e77438 | 1319 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 0); |
3fdadf7d | 1320 | #ifdef CONFIG_NETFILTER |
cf6fc4a9 WY |
1321 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1322 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1323 | int len; |
1324 | ||
1325 | if (get_user(len, optlen)) | |
1326 | return -EFAULT; | |
1327 | ||
1328 | lock_sock(sk); | |
1329 | err = nf_getsockopt(sk, PF_INET6, optname, optval, | |
1330 | &len); | |
1331 | release_sock(sk); | |
1332 | if (err >= 0) | |
1333 | err = put_user(len, optlen); | |
1334 | } | |
1335 | #endif | |
1336 | return err; | |
1337 | } | |
7159039a YH |
1338 | EXPORT_SYMBOL(ipv6_getsockopt); |
1339 | ||
3fdadf7d DM |
1340 | #ifdef CONFIG_COMPAT |
1341 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1342 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
1343 | { |
1344 | int err; | |
1345 | ||
1346 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
1347 | if (udp_prot.compat_getsockopt != NULL) |
1348 | return udp_prot.compat_getsockopt(sk, level, optname, | |
1349 | optval, optlen); | |
1350 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
1351 | } |
1352 | ||
543d9cfe | 1353 | if (level != SOL_IPV6) |
3fdadf7d DM |
1354 | return -ENOPROTOOPT; |
1355 | ||
80991790 PE |
1356 | if (optname == MCAST_MSFILTER) |
1357 | return compat_mc_getsockopt(sk, level, optname, optval, optlen, | |
1358 | ipv6_getsockopt); | |
1359 | ||
98e77438 DB |
1360 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, |
1361 | MSG_CMSG_COMPAT); | |
3fdadf7d | 1362 | #ifdef CONFIG_NETFILTER |
cf6fc4a9 WY |
1363 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1364 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1365 | int len; |
1366 | ||
1367 | if (get_user(len, optlen)) | |
1368 | return -EFAULT; | |
1369 | ||
1370 | lock_sock(sk); | |
543d9cfe ACM |
1371 | err = compat_nf_getsockopt(sk, PF_INET6, |
1372 | optname, optval, &len); | |
3fdadf7d DM |
1373 | release_sock(sk); |
1374 | if (err >= 0) | |
1375 | err = put_user(len, optlen); | |
1376 | } | |
1377 | #endif | |
1378 | return err; | |
1379 | } | |
543d9cfe | 1380 | EXPORT_SYMBOL(compat_ipv6_getsockopt); |
3fdadf7d DM |
1381 | #endif |
1382 |