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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 LT |
68 | |
69 | new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; | |
70 | ||
71 | write_lock_bh(&ip6_ra_lock); | |
72 | for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) { | |
73 | if (ra->sk == sk) { | |
74 | if (sel>=0) { | |
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 | } | |
113 | opt = xchg(&inet6_sk(sk)->opt, opt); | |
114 | } else { | |
b6c6712a | 115 | spin_lock(&sk->sk_dst_lock); |
e7712f1a | 116 | opt = xchg(&inet6_sk(sk)->opt, opt); |
b6c6712a | 117 | spin_unlock(&sk->sk_dst_lock); |
e7712f1a YH |
118 | } |
119 | sk_dst_reset(sk); | |
120 | ||
121 | return opt; | |
122 | } | |
123 | ||
3fdadf7d | 124 | static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 125 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
126 | { |
127 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 128 | struct net *net = sock_net(sk); |
1da177e4 LT |
129 | int val, valbool; |
130 | int retv = -ENOPROTOOPT; | |
131 | ||
1da177e4 LT |
132 | if (optval == NULL) |
133 | val=0; | |
b2a9d7c2 YH |
134 | else { |
135 | if (optlen >= sizeof(int)) { | |
136 | if (get_user(val, (int __user *) optval)) | |
137 | return -EFAULT; | |
138 | } else | |
139 | val = 0; | |
140 | } | |
1da177e4 LT |
141 | |
142 | valbool = (val!=0); | |
143 | ||
7bc570c8 YH |
144 | if (ip6_mroute_opt(optname)) |
145 | return ip6_mroute_setsockopt(sk, optname, optval, optlen); | |
146 | ||
1da177e4 LT |
147 | lock_sock(sk); |
148 | ||
149 | switch (optname) { | |
150 | ||
151 | case IPV6_ADDRFORM: | |
b2a9d7c2 YH |
152 | if (optlen < sizeof(int)) |
153 | goto e_inval; | |
1da177e4 LT |
154 | if (val == PF_INET) { |
155 | struct ipv6_txoptions *opt; | |
156 | struct sk_buff *pktopt; | |
157 | ||
49d074f4 DL |
158 | if (sk->sk_type == SOCK_RAW) |
159 | break; | |
160 | ||
9596cc82 DL |
161 | if (sk->sk_protocol == IPPROTO_UDP || |
162 | sk->sk_protocol == IPPROTO_UDPLITE) { | |
163 | struct udp_sock *up = udp_sk(sk); | |
164 | if (up->pending == AF_INET6) { | |
165 | retv = -EBUSY; | |
166 | break; | |
167 | } | |
168 | } else if (sk->sk_protocol != IPPROTO_TCP) | |
1da177e4 LT |
169 | break; |
170 | ||
171 | if (sk->sk_state != TCP_ESTABLISHED) { | |
172 | retv = -ENOTCONN; | |
173 | break; | |
174 | } | |
175 | ||
176 | if (ipv6_only_sock(sk) || | |
e773e4fa | 177 | !ipv6_addr_v4mapped(&np->daddr)) { |
1da177e4 LT |
178 | retv = -EADDRNOTAVAIL; |
179 | break; | |
180 | } | |
181 | ||
182 | fl6_free_socklist(sk); | |
183 | ipv6_sock_mc_close(sk); | |
184 | ||
e6848976 ACM |
185 | /* |
186 | * Sock is moving from IPv6 to IPv4 (sk_prot), so | |
187 | * remove it from the refcnt debug socks count in the | |
188 | * original family... | |
189 | */ | |
190 | sk_refcnt_debug_dec(sk); | |
191 | ||
1da177e4 | 192 | if (sk->sk_protocol == IPPROTO_TCP) { |
d83d8461 | 193 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 | 194 | local_bh_disable(); |
c29a0bc4 PE |
195 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
196 | sock_prot_inuse_add(net, &tcp_prot, 1); | |
1da177e4 LT |
197 | local_bh_enable(); |
198 | sk->sk_prot = &tcp_prot; | |
d83d8461 | 199 | icsk->icsk_af_ops = &ipv4_specific; |
1da177e4 LT |
200 | sk->sk_socket->ops = &inet_stream_ops; |
201 | sk->sk_family = PF_INET; | |
d83d8461 | 202 | tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); |
1da177e4 | 203 | } else { |
ba4e58ec GR |
204 | struct proto *prot = &udp_prot; |
205 | ||
db8dac20 | 206 | if (sk->sk_protocol == IPPROTO_UDPLITE) |
ba4e58ec | 207 | prot = &udplite_prot; |
1da177e4 | 208 | local_bh_disable(); |
c29a0bc4 PE |
209 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
210 | sock_prot_inuse_add(net, prot, 1); | |
1da177e4 | 211 | local_bh_enable(); |
ba4e58ec | 212 | sk->sk_prot = prot; |
1da177e4 LT |
213 | sk->sk_socket->ops = &inet_dgram_ops; |
214 | sk->sk_family = PF_INET; | |
215 | } | |
216 | opt = xchg(&np->opt, NULL); | |
217 | if (opt) | |
218 | sock_kfree_s(sk, opt, opt->tot_len); | |
219 | pktopt = xchg(&np->pktoptions, NULL); | |
800d55f1 | 220 | kfree_skb(pktopt); |
1da177e4 LT |
221 | |
222 | sk->sk_destruct = inet_sock_destruct; | |
e6848976 ACM |
223 | /* |
224 | * ... and add it to the refcnt debug socks count | |
225 | * in the new family. -acme | |
226 | */ | |
227 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
228 | module_put(THIS_MODULE); |
229 | retv = 0; | |
230 | break; | |
231 | } | |
232 | goto e_inval; | |
233 | ||
234 | case IPV6_V6ONLY: | |
b2a9d7c2 | 235 | if (optlen < sizeof(int) || |
c720c7e8 | 236 | inet_sk(sk)->inet_num) |
1da177e4 LT |
237 | goto e_inval; |
238 | np->ipv6only = valbool; | |
239 | retv = 0; | |
240 | break; | |
241 | ||
333fad53 | 242 | case IPV6_RECVPKTINFO: |
b2a9d7c2 YH |
243 | if (optlen < sizeof(int)) |
244 | goto e_inval; | |
1da177e4 LT |
245 | np->rxopt.bits.rxinfo = valbool; |
246 | retv = 0; | |
247 | break; | |
1ab1457c | 248 | |
333fad53 | 249 | case IPV6_2292PKTINFO: |
b2a9d7c2 YH |
250 | if (optlen < sizeof(int)) |
251 | goto e_inval; | |
333fad53 YH |
252 | np->rxopt.bits.rxoinfo = valbool; |
253 | retv = 0; | |
254 | break; | |
1da177e4 | 255 | |
333fad53 | 256 | case IPV6_RECVHOPLIMIT: |
b2a9d7c2 YH |
257 | if (optlen < sizeof(int)) |
258 | goto e_inval; | |
1da177e4 LT |
259 | np->rxopt.bits.rxhlim = valbool; |
260 | retv = 0; | |
261 | break; | |
262 | ||
333fad53 | 263 | case IPV6_2292HOPLIMIT: |
b2a9d7c2 YH |
264 | if (optlen < sizeof(int)) |
265 | goto e_inval; | |
333fad53 YH |
266 | np->rxopt.bits.rxohlim = valbool; |
267 | retv = 0; | |
268 | break; | |
269 | ||
270 | case IPV6_RECVRTHDR: | |
b2a9d7c2 YH |
271 | if (optlen < sizeof(int)) |
272 | goto e_inval; | |
4c752098 | 273 | np->rxopt.bits.srcrt = valbool; |
1da177e4 LT |
274 | retv = 0; |
275 | break; | |
276 | ||
333fad53 | 277 | case IPV6_2292RTHDR: |
b2a9d7c2 YH |
278 | if (optlen < sizeof(int)) |
279 | goto e_inval; | |
4c752098 | 280 | np->rxopt.bits.osrcrt = valbool; |
333fad53 YH |
281 | retv = 0; |
282 | break; | |
283 | ||
284 | case IPV6_RECVHOPOPTS: | |
b2a9d7c2 YH |
285 | if (optlen < sizeof(int)) |
286 | goto e_inval; | |
1da177e4 LT |
287 | np->rxopt.bits.hopopts = valbool; |
288 | retv = 0; | |
289 | break; | |
290 | ||
333fad53 | 291 | case IPV6_2292HOPOPTS: |
b2a9d7c2 YH |
292 | if (optlen < sizeof(int)) |
293 | goto e_inval; | |
333fad53 YH |
294 | np->rxopt.bits.ohopopts = valbool; |
295 | retv = 0; | |
296 | break; | |
297 | ||
298 | case IPV6_RECVDSTOPTS: | |
b2a9d7c2 YH |
299 | if (optlen < sizeof(int)) |
300 | goto e_inval; | |
1da177e4 LT |
301 | np->rxopt.bits.dstopts = valbool; |
302 | retv = 0; | |
303 | break; | |
304 | ||
333fad53 | 305 | case IPV6_2292DSTOPTS: |
b2a9d7c2 YH |
306 | if (optlen < sizeof(int)) |
307 | goto e_inval; | |
333fad53 YH |
308 | np->rxopt.bits.odstopts = valbool; |
309 | retv = 0; | |
310 | break; | |
311 | ||
41a1f8ea | 312 | case IPV6_TCLASS: |
b2a9d7c2 YH |
313 | if (optlen < sizeof(int)) |
314 | goto e_inval; | |
d0ee011f | 315 | if (val < -1 || val > 0xff) |
41a1f8ea | 316 | goto e_inval; |
26ced1e4 GR |
317 | /* RFC 3542, 6.5: default traffic class of 0x0 */ |
318 | if (val == -1) | |
319 | val = 0; | |
41a1f8ea YH |
320 | np->tclass = val; |
321 | retv = 0; | |
322 | break; | |
1ab1457c | 323 | |
41a1f8ea | 324 | case IPV6_RECVTCLASS: |
b2a9d7c2 YH |
325 | if (optlen < sizeof(int)) |
326 | goto e_inval; | |
41a1f8ea YH |
327 | np->rxopt.bits.rxtclass = valbool; |
328 | retv = 0; | |
329 | break; | |
330 | ||
1da177e4 | 331 | case IPV6_FLOWINFO: |
b2a9d7c2 YH |
332 | if (optlen < sizeof(int)) |
333 | goto e_inval; | |
1da177e4 LT |
334 | np->rxopt.bits.rxflow = valbool; |
335 | retv = 0; | |
336 | break; | |
337 | ||
793b1473 BH |
338 | case IPV6_RECVPATHMTU: |
339 | if (optlen < sizeof(int)) | |
340 | goto e_inval; | |
341 | np->rxopt.bits.rxpmtu = valbool; | |
342 | retv = 0; | |
343 | break; | |
344 | ||
333fad53 YH |
345 | case IPV6_HOPOPTS: |
346 | case IPV6_RTHDRDSTOPTS: | |
347 | case IPV6_RTHDR: | |
348 | case IPV6_DSTOPTS: | |
349 | { | |
350 | struct ipv6_txoptions *opt; | |
aea7427f SW |
351 | |
352 | /* remove any sticky options header with a zero option | |
353 | * length, per RFC3542. | |
354 | */ | |
333fad53 | 355 | if (optlen == 0) |
cb422c46 | 356 | optval = NULL; |
cfb266c0 YH |
357 | else if (optval == NULL) |
358 | goto e_inval; | |
aea7427f SW |
359 | else if (optlen < sizeof(struct ipv6_opt_hdr) || |
360 | optlen & 0x7 || optlen > 8 * 255) | |
361 | goto e_inval; | |
333fad53 YH |
362 | |
363 | /* hop-by-hop / destination options are privileged option */ | |
364 | retv = -EPERM; | |
365 | if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW)) | |
366 | break; | |
367 | ||
333fad53 YH |
368 | opt = ipv6_renew_options(sk, np->opt, optname, |
369 | (struct ipv6_opt_hdr __user *)optval, | |
370 | optlen); | |
371 | if (IS_ERR(opt)) { | |
372 | retv = PTR_ERR(opt); | |
373 | break; | |
374 | } | |
375 | ||
376 | /* routing header option needs extra check */ | |
6e093d9d | 377 | retv = -EINVAL; |
dfee0a72 | 378 | if (optname == IPV6_RTHDR && opt && opt->srcrt) { |
333fad53 | 379 | struct ipv6_rt_hdr *rthdr = opt->srcrt; |
280a9d34 | 380 | switch (rthdr->type) { |
59fbb3a6 | 381 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
280a9d34 | 382 | case IPV6_SRCRT_TYPE_2: |
6e093d9d BH |
383 | if (rthdr->hdrlen != 2 || |
384 | rthdr->segments_left != 1) | |
385 | goto sticky_done; | |
386 | ||
280a9d34 | 387 | break; |
bb4dbf9e | 388 | #endif |
280a9d34 | 389 | default: |
333fad53 | 390 | goto sticky_done; |
280a9d34 | 391 | } |
333fad53 YH |
392 | } |
393 | ||
394 | retv = 0; | |
e7712f1a | 395 | opt = ipv6_update_options(sk, opt); |
333fad53 YH |
396 | sticky_done: |
397 | if (opt) | |
398 | sock_kfree_s(sk, opt, opt->tot_len); | |
399 | break; | |
400 | } | |
401 | ||
b24a2516 YH |
402 | case IPV6_PKTINFO: |
403 | { | |
404 | struct in6_pktinfo pkt; | |
405 | ||
406 | if (optlen == 0) | |
407 | goto e_inval; | |
408 | else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL) | |
409 | goto e_inval; | |
410 | ||
914d1164 | 411 | if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) { |
b24a2516 YH |
412 | retv = -EFAULT; |
413 | break; | |
414 | } | |
415 | if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if) | |
416 | goto e_inval; | |
417 | ||
418 | np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex; | |
419 | ipv6_addr_copy(&np->sticky_pktinfo.ipi6_addr, &pkt.ipi6_addr); | |
420 | retv = 0; | |
421 | break; | |
422 | } | |
423 | ||
333fad53 | 424 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
425 | { |
426 | struct ipv6_txoptions *opt = NULL; | |
427 | struct msghdr msg; | |
428 | struct flowi fl; | |
429 | int junk; | |
430 | ||
431 | fl.fl6_flowlabel = 0; | |
432 | fl.oif = sk->sk_bound_dev_if; | |
51953d5b | 433 | fl.mark = sk->sk_mark; |
1da177e4 LT |
434 | |
435 | if (optlen == 0) | |
436 | goto update; | |
437 | ||
438 | /* 1K is probably excessive | |
439 | * 1K is surely not enough, 2K per standard header is 16K. | |
440 | */ | |
441 | retv = -EINVAL; | |
442 | if (optlen > 64*1024) | |
443 | break; | |
444 | ||
445 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
446 | retv = -ENOBUFS; | |
447 | if (opt == NULL) | |
448 | break; | |
449 | ||
450 | memset(opt, 0, sizeof(*opt)); | |
451 | opt->tot_len = sizeof(*opt) + optlen; | |
452 | retv = -EFAULT; | |
453 | if (copy_from_user(opt+1, optval, optlen)) | |
454 | goto done; | |
455 | ||
456 | msg.msg_controllen = optlen; | |
457 | msg.msg_control = (void*)(opt+1); | |
458 | ||
13b52cd4 BH |
459 | retv = datagram_send_ctl(net, &msg, &fl, opt, &junk, &junk, |
460 | &junk); | |
1da177e4 LT |
461 | if (retv) |
462 | goto done; | |
463 | update: | |
464 | retv = 0; | |
e7712f1a | 465 | opt = ipv6_update_options(sk, opt); |
1da177e4 LT |
466 | done: |
467 | if (opt) | |
468 | sock_kfree_s(sk, opt, opt->tot_len); | |
469 | break; | |
470 | } | |
471 | case IPV6_UNICAST_HOPS: | |
b2a9d7c2 YH |
472 | if (optlen < sizeof(int)) |
473 | goto e_inval; | |
1da177e4 LT |
474 | if (val > 255 || val < -1) |
475 | goto e_inval; | |
476 | np->hop_limit = val; | |
477 | retv = 0; | |
478 | break; | |
479 | ||
480 | case IPV6_MULTICAST_HOPS: | |
481 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 482 | break; |
b2a9d7c2 YH |
483 | if (optlen < sizeof(int)) |
484 | goto e_inval; | |
1da177e4 LT |
485 | if (val > 255 || val < -1) |
486 | goto e_inval; | |
487 | np->mcast_hops = val; | |
488 | retv = 0; | |
489 | break; | |
490 | ||
491 | case IPV6_MULTICAST_LOOP: | |
b2a9d7c2 YH |
492 | if (optlen < sizeof(int)) |
493 | goto e_inval; | |
28d44882 YH |
494 | if (val != valbool) |
495 | goto e_inval; | |
1da177e4 LT |
496 | np->mc_loop = valbool; |
497 | retv = 0; | |
498 | break; | |
499 | ||
500 | case IPV6_MULTICAST_IF: | |
501 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 502 | break; |
b2a9d7c2 YH |
503 | if (optlen < sizeof(int)) |
504 | goto e_inval; | |
1da177e4 | 505 | |
4953f0fc | 506 | if (val) { |
55b80503 ED |
507 | struct net_device *dev; |
508 | ||
4953f0fc BH |
509 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) |
510 | goto e_inval; | |
511 | ||
55b80503 ED |
512 | dev = dev_get_by_index(net, val); |
513 | if (!dev) { | |
4953f0fc BH |
514 | retv = -ENODEV; |
515 | break; | |
516 | } | |
55b80503 | 517 | dev_put(dev); |
1da177e4 LT |
518 | } |
519 | np->mcast_oif = val; | |
520 | retv = 0; | |
521 | break; | |
522 | case IPV6_ADD_MEMBERSHIP: | |
523 | case IPV6_DROP_MEMBERSHIP: | |
524 | { | |
525 | struct ipv6_mreq mreq; | |
526 | ||
a28398ba WC |
527 | if (optlen < sizeof(struct ipv6_mreq)) |
528 | goto e_inval; | |
529 | ||
a96fb49b FL |
530 | retv = -EPROTO; |
531 | if (inet_sk(sk)->is_icsk) | |
532 | break; | |
533 | ||
1da177e4 LT |
534 | retv = -EFAULT; |
535 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
536 | break; | |
537 | ||
538 | if (optname == IPV6_ADD_MEMBERSHIP) | |
539 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
540 | else | |
541 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
542 | break; | |
543 | } | |
544 | case IPV6_JOIN_ANYCAST: | |
545 | case IPV6_LEAVE_ANYCAST: | |
546 | { | |
547 | struct ipv6_mreq mreq; | |
548 | ||
a28398ba | 549 | if (optlen < sizeof(struct ipv6_mreq)) |
1da177e4 LT |
550 | goto e_inval; |
551 | ||
552 | retv = -EFAULT; | |
553 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
554 | break; | |
555 | ||
556 | if (optname == IPV6_JOIN_ANYCAST) | |
557 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
558 | else | |
559 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
560 | break; | |
561 | } | |
562 | case MCAST_JOIN_GROUP: | |
563 | case MCAST_LEAVE_GROUP: | |
564 | { | |
565 | struct group_req greq; | |
566 | struct sockaddr_in6 *psin6; | |
567 | ||
a28398ba WC |
568 | if (optlen < sizeof(struct group_req)) |
569 | goto e_inval; | |
570 | ||
1da177e4 LT |
571 | retv = -EFAULT; |
572 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
573 | break; | |
574 | if (greq.gr_group.ss_family != AF_INET6) { | |
575 | retv = -EADDRNOTAVAIL; | |
576 | break; | |
577 | } | |
578 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
579 | if (optname == MCAST_JOIN_GROUP) | |
580 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, | |
581 | &psin6->sin6_addr); | |
582 | else | |
583 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, | |
584 | &psin6->sin6_addr); | |
585 | break; | |
586 | } | |
587 | case MCAST_JOIN_SOURCE_GROUP: | |
588 | case MCAST_LEAVE_SOURCE_GROUP: | |
589 | case MCAST_BLOCK_SOURCE: | |
590 | case MCAST_UNBLOCK_SOURCE: | |
591 | { | |
592 | struct group_source_req greqs; | |
593 | int omode, add; | |
594 | ||
a28398ba | 595 | if (optlen < sizeof(struct group_source_req)) |
1da177e4 LT |
596 | goto e_inval; |
597 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
598 | retv = -EFAULT; | |
599 | break; | |
600 | } | |
601 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
602 | greqs.gsr_source.ss_family != AF_INET6) { | |
603 | retv = -EADDRNOTAVAIL; | |
604 | break; | |
605 | } | |
606 | if (optname == MCAST_BLOCK_SOURCE) { | |
607 | omode = MCAST_EXCLUDE; | |
608 | add = 1; | |
609 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
610 | omode = MCAST_EXCLUDE; | |
611 | add = 0; | |
612 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
613 | struct sockaddr_in6 *psin6; | |
614 | ||
615 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
616 | retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, | |
617 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
618 | /* prior join w/ different source is ok */ |
619 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
620 | break; |
621 | omode = MCAST_INCLUDE; | |
622 | add = 1; | |
c9e3e8b6 | 623 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
624 | omode = MCAST_INCLUDE; |
625 | add = 0; | |
626 | } | |
627 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
628 | break; | |
629 | } | |
630 | case MCAST_MSFILTER: | |
631 | { | |
1da177e4 LT |
632 | extern int sysctl_mld_max_msf; |
633 | struct group_filter *gsf; | |
634 | ||
635 | if (optlen < GROUP_FILTER_SIZE(0)) | |
636 | goto e_inval; | |
637 | if (optlen > sysctl_optmem_max) { | |
638 | retv = -ENOBUFS; | |
639 | break; | |
640 | } | |
8b3a7005 | 641 | gsf = kmalloc(optlen,GFP_KERNEL); |
cfcabdcc | 642 | if (!gsf) { |
1da177e4 LT |
643 | retv = -ENOBUFS; |
644 | break; | |
645 | } | |
646 | retv = -EFAULT; | |
647 | if (copy_from_user(gsf, optval, optlen)) { | |
648 | kfree(gsf); | |
649 | break; | |
650 | } | |
651 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
652 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
653 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
654 | kfree(gsf); | |
655 | retv = -ENOBUFS; | |
656 | break; | |
657 | } | |
658 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
659 | kfree(gsf); | |
660 | retv = -EINVAL; | |
661 | break; | |
662 | } | |
663 | retv = ip6_mc_msfilter(sk, gsf); | |
664 | kfree(gsf); | |
665 | ||
666 | break; | |
667 | } | |
668 | case IPV6_ROUTER_ALERT: | |
b2a9d7c2 YH |
669 | if (optlen < sizeof(int)) |
670 | goto e_inval; | |
725a8ff0 | 671 | retv = ip6_ra_control(sk, val); |
1da177e4 LT |
672 | break; |
673 | case IPV6_MTU_DISCOVER: | |
b2a9d7c2 YH |
674 | if (optlen < sizeof(int)) |
675 | goto e_inval; | |
0eae750e | 676 | if (val < IP_PMTUDISC_DONT || val > IP_PMTUDISC_PROBE) |
1da177e4 LT |
677 | goto e_inval; |
678 | np->pmtudisc = val; | |
679 | retv = 0; | |
680 | break; | |
681 | case IPV6_MTU: | |
b2a9d7c2 YH |
682 | if (optlen < sizeof(int)) |
683 | goto e_inval; | |
1da177e4 LT |
684 | if (val && val < IPV6_MIN_MTU) |
685 | goto e_inval; | |
686 | np->frag_size = val; | |
687 | retv = 0; | |
688 | break; | |
689 | case IPV6_RECVERR: | |
b2a9d7c2 YH |
690 | if (optlen < sizeof(int)) |
691 | goto e_inval; | |
1da177e4 LT |
692 | np->recverr = valbool; |
693 | if (!val) | |
694 | skb_queue_purge(&sk->sk_error_queue); | |
695 | retv = 0; | |
696 | break; | |
697 | case IPV6_FLOWINFO_SEND: | |
b2a9d7c2 YH |
698 | if (optlen < sizeof(int)) |
699 | goto e_inval; | |
1da177e4 LT |
700 | np->sndflow = valbool; |
701 | retv = 0; | |
702 | break; | |
703 | case IPV6_FLOWLABEL_MGR: | |
704 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
705 | break; | |
706 | case IPV6_IPSEC_POLICY: | |
707 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 HX |
708 | retv = -EPERM; |
709 | if (!capable(CAP_NET_ADMIN)) | |
710 | break; | |
1da177e4 LT |
711 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
712 | break; | |
713 | ||
7cbca67c YH |
714 | case IPV6_ADDR_PREFERENCES: |
715 | { | |
716 | unsigned int pref = 0; | |
717 | unsigned int prefmask = ~0; | |
718 | ||
b2a9d7c2 YH |
719 | if (optlen < sizeof(int)) |
720 | goto e_inval; | |
721 | ||
7cbca67c YH |
722 | retv = -EINVAL; |
723 | ||
724 | /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ | |
725 | switch (val & (IPV6_PREFER_SRC_PUBLIC| | |
726 | IPV6_PREFER_SRC_TMP| | |
727 | IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { | |
728 | case IPV6_PREFER_SRC_PUBLIC: | |
729 | pref |= IPV6_PREFER_SRC_PUBLIC; | |
730 | break; | |
731 | case IPV6_PREFER_SRC_TMP: | |
732 | pref |= IPV6_PREFER_SRC_TMP; | |
733 | break; | |
734 | case IPV6_PREFER_SRC_PUBTMP_DEFAULT: | |
735 | break; | |
736 | case 0: | |
737 | goto pref_skip_pubtmp; | |
738 | default: | |
739 | goto e_inval; | |
740 | } | |
741 | ||
742 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| | |
743 | IPV6_PREFER_SRC_TMP); | |
744 | pref_skip_pubtmp: | |
745 | ||
746 | /* check HOME/COA conflicts */ | |
747 | switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { | |
748 | case IPV6_PREFER_SRC_HOME: | |
749 | break; | |
750 | case IPV6_PREFER_SRC_COA: | |
751 | pref |= IPV6_PREFER_SRC_COA; | |
752 | case 0: | |
753 | goto pref_skip_coa; | |
754 | default: | |
755 | goto e_inval; | |
756 | } | |
757 | ||
758 | prefmask &= ~IPV6_PREFER_SRC_COA; | |
759 | pref_skip_coa: | |
760 | ||
761 | /* check CGA/NONCGA conflicts */ | |
762 | switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { | |
763 | case IPV6_PREFER_SRC_CGA: | |
764 | case IPV6_PREFER_SRC_NONCGA: | |
765 | case 0: | |
766 | break; | |
767 | default: | |
768 | goto e_inval; | |
769 | } | |
770 | ||
771 | np->srcprefs = (np->srcprefs & prefmask) | pref; | |
772 | retv = 0; | |
773 | ||
774 | break; | |
775 | } | |
e802af9c SH |
776 | case IPV6_MINHOPCOUNT: |
777 | if (optlen < sizeof(int)) | |
778 | goto e_inval; | |
779 | if (val < 0 || val > 255) | |
780 | goto e_inval; | |
781 | np->min_hopcount = val; | |
793b1473 BH |
782 | break; |
783 | case IPV6_DONTFRAG: | |
784 | np->dontfrag = valbool; | |
e802af9c SH |
785 | retv = 0; |
786 | break; | |
1da177e4 | 787 | } |
7cbca67c | 788 | |
1da177e4 LT |
789 | release_sock(sk); |
790 | ||
1da177e4 LT |
791 | return retv; |
792 | ||
793 | e_inval: | |
794 | release_sock(sk); | |
795 | return -EINVAL; | |
796 | } | |
797 | ||
3fdadf7d | 798 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 799 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
800 | { |
801 | int err; | |
802 | ||
803 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
804 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
805 | ||
806 | if (level != SOL_IPV6) | |
807 | return -ENOPROTOOPT; | |
808 | ||
809 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
810 | #ifdef CONFIG_NETFILTER | |
811 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
812 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
813 | optname != IPV6_XFRM_POLICY) { | |
814 | lock_sock(sk); | |
815 | err = nf_setsockopt(sk, PF_INET6, optname, optval, | |
816 | optlen); | |
817 | release_sock(sk); | |
818 | } | |
819 | #endif | |
820 | return err; | |
821 | } | |
822 | ||
7159039a | 823 | EXPORT_SYMBOL(ipv6_setsockopt); |
3fdadf7d DM |
824 | |
825 | #ifdef CONFIG_COMPAT | |
826 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
b7058842 | 827 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
828 | { |
829 | int err; | |
830 | ||
831 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
832 | if (udp_prot.compat_setsockopt != NULL) |
833 | return udp_prot.compat_setsockopt(sk, level, optname, | |
834 | optval, optlen); | |
835 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
836 | } |
837 | ||
838 | if (level != SOL_IPV6) | |
839 | return -ENOPROTOOPT; | |
840 | ||
dae50295 DS |
841 | if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) |
842 | return compat_mc_setsockopt(sk, level, optname, optval, optlen, | |
843 | ipv6_setsockopt); | |
844 | ||
3fdadf7d DM |
845 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); |
846 | #ifdef CONFIG_NETFILTER | |
847 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
848 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
543d9cfe | 849 | optname != IPV6_XFRM_POLICY) { |
3fdadf7d | 850 | lock_sock(sk); |
543d9cfe ACM |
851 | err = compat_nf_setsockopt(sk, PF_INET6, optname, |
852 | optval, optlen); | |
3fdadf7d DM |
853 | release_sock(sk); |
854 | } | |
855 | #endif | |
856 | return err; | |
857 | } | |
543d9cfe ACM |
858 | |
859 | EXPORT_SYMBOL(compat_ipv6_setsockopt); | |
3fdadf7d DM |
860 | #endif |
861 | ||
28693079 | 862 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, |
4c6510a7 | 863 | int optname, char __user *optval, int len) |
333fad53 | 864 | { |
28693079 DM |
865 | struct ipv6_opt_hdr *hdr; |
866 | ||
4c6510a7 YH |
867 | if (!opt) |
868 | return 0; | |
869 | ||
870 | switch(optname) { | |
871 | case IPV6_HOPOPTS: | |
872 | hdr = opt->hopopt; | |
873 | break; | |
874 | case IPV6_RTHDRDSTOPTS: | |
875 | hdr = opt->dst0opt; | |
876 | break; | |
877 | case IPV6_RTHDR: | |
878 | hdr = (struct ipv6_opt_hdr *)opt->srcrt; | |
879 | break; | |
880 | case IPV6_DSTOPTS: | |
881 | hdr = opt->dst1opt; | |
882 | break; | |
883 | default: | |
884 | return -EINVAL; /* should not happen */ | |
885 | } | |
886 | ||
887 | if (!hdr) | |
333fad53 | 888 | return 0; |
28693079 | 889 | |
d2b02ed9 | 890 | len = min_t(unsigned int, len, ipv6_optlen(hdr)); |
660adc6e | 891 | if (copy_to_user(optval, hdr, len)) |
333fad53 | 892 | return -EFAULT; |
95b496b6 | 893 | return len; |
333fad53 YH |
894 | } |
895 | ||
3fdadf7d | 896 | static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
897 | char __user *optval, int __user *optlen) |
898 | { | |
899 | struct ipv6_pinfo *np = inet6_sk(sk); | |
900 | int len; | |
901 | int val; | |
902 | ||
7bc570c8 YH |
903 | if (ip6_mroute_opt(optname)) |
904 | return ip6_mroute_getsockopt(sk, optname, optval, optlen); | |
905 | ||
1da177e4 LT |
906 | if (get_user(len, optlen)) |
907 | return -EFAULT; | |
908 | switch (optname) { | |
909 | case IPV6_ADDRFORM: | |
910 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 911 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 | 912 | sk->sk_protocol != IPPROTO_TCP) |
1717699c | 913 | return -ENOPROTOOPT; |
1da177e4 LT |
914 | if (sk->sk_state != TCP_ESTABLISHED) |
915 | return -ENOTCONN; | |
916 | val = sk->sk_family; | |
917 | break; | |
918 | case MCAST_MSFILTER: | |
919 | { | |
920 | struct group_filter gsf; | |
921 | int err; | |
922 | ||
923 | if (len < GROUP_FILTER_SIZE(0)) | |
924 | return -EINVAL; | |
925 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
926 | return -EFAULT; | |
20c61fbd YH |
927 | if (gsf.gf_group.ss_family != AF_INET6) |
928 | return -EADDRNOTAVAIL; | |
1da177e4 LT |
929 | lock_sock(sk); |
930 | err = ip6_mc_msfget(sk, &gsf, | |
931 | (struct group_filter __user *)optval, optlen); | |
932 | release_sock(sk); | |
933 | return err; | |
934 | } | |
935 | ||
333fad53 | 936 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
937 | { |
938 | struct msghdr msg; | |
939 | struct sk_buff *skb; | |
940 | ||
941 | if (sk->sk_type != SOCK_STREAM) | |
942 | return -ENOPROTOOPT; | |
943 | ||
944 | msg.msg_control = optval; | |
945 | msg.msg_controllen = len; | |
946 | msg.msg_flags = 0; | |
947 | ||
948 | lock_sock(sk); | |
949 | skb = np->pktoptions; | |
950 | if (skb) | |
951 | atomic_inc(&skb->users); | |
952 | release_sock(sk); | |
953 | ||
954 | if (skb) { | |
955 | int err = datagram_recv_ctl(sk, &msg, skb); | |
956 | kfree_skb(skb); | |
957 | if (err) | |
958 | return err; | |
959 | } else { | |
960 | if (np->rxopt.bits.rxinfo) { | |
961 | struct in6_pktinfo src_info; | |
f250dcda YH |
962 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
963 | np->sticky_pktinfo.ipi6_ifindex; | |
964 | np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) : | |
965 | ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr)); | |
1da177e4 LT |
966 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); |
967 | } | |
968 | if (np->rxopt.bits.rxhlim) { | |
969 | int hlim = np->mcast_hops; | |
970 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
971 | } | |
333fad53 YH |
972 | if (np->rxopt.bits.rxoinfo) { |
973 | struct in6_pktinfo src_info; | |
f250dcda YH |
974 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
975 | np->sticky_pktinfo.ipi6_ifindex; | |
976 | np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) : | |
977 | ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr)); | |
333fad53 YH |
978 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); |
979 | } | |
980 | if (np->rxopt.bits.rxohlim) { | |
981 | int hlim = np->mcast_hops; | |
982 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
983 | } | |
1da177e4 LT |
984 | } |
985 | len -= msg.msg_controllen; | |
986 | return put_user(len, optlen); | |
987 | } | |
988 | case IPV6_MTU: | |
989 | { | |
990 | struct dst_entry *dst; | |
b6c6712a | 991 | |
1ab1457c | 992 | val = 0; |
b6c6712a ED |
993 | rcu_read_lock(); |
994 | dst = __sk_dst_get(sk); | |
995 | if (dst) | |
1da177e4 | 996 | val = dst_mtu(dst); |
b6c6712a | 997 | rcu_read_unlock(); |
1da177e4 LT |
998 | if (!val) |
999 | return -ENOTCONN; | |
1000 | break; | |
1001 | } | |
1002 | ||
1003 | case IPV6_V6ONLY: | |
1004 | val = np->ipv6only; | |
1005 | break; | |
1006 | ||
333fad53 | 1007 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
1008 | val = np->rxopt.bits.rxinfo; |
1009 | break; | |
1010 | ||
333fad53 YH |
1011 | case IPV6_2292PKTINFO: |
1012 | val = np->rxopt.bits.rxoinfo; | |
1013 | break; | |
1014 | ||
1015 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
1016 | val = np->rxopt.bits.rxhlim; |
1017 | break; | |
1018 | ||
333fad53 YH |
1019 | case IPV6_2292HOPLIMIT: |
1020 | val = np->rxopt.bits.rxohlim; | |
1021 | break; | |
1022 | ||
1023 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
1024 | val = np->rxopt.bits.srcrt; |
1025 | break; | |
1026 | ||
333fad53 YH |
1027 | case IPV6_2292RTHDR: |
1028 | val = np->rxopt.bits.osrcrt; | |
1029 | break; | |
1030 | ||
1da177e4 | 1031 | case IPV6_HOPOPTS: |
333fad53 YH |
1032 | case IPV6_RTHDRDSTOPTS: |
1033 | case IPV6_RTHDR: | |
1034 | case IPV6_DSTOPTS: | |
1035 | { | |
1036 | ||
1037 | lock_sock(sk); | |
28693079 | 1038 | len = ipv6_getsockopt_sticky(sk, np->opt, |
4c6510a7 | 1039 | optname, optval, len); |
333fad53 | 1040 | release_sock(sk); |
05335c22 YH |
1041 | /* check if ipv6_getsockopt_sticky() returns err code */ |
1042 | if (len < 0) | |
1043 | return len; | |
333fad53 YH |
1044 | return put_user(len, optlen); |
1045 | } | |
1046 | ||
1047 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
1048 | val = np->rxopt.bits.hopopts; |
1049 | break; | |
1050 | ||
333fad53 YH |
1051 | case IPV6_2292HOPOPTS: |
1052 | val = np->rxopt.bits.ohopopts; | |
1053 | break; | |
1054 | ||
1055 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
1056 | val = np->rxopt.bits.dstopts; |
1057 | break; | |
1058 | ||
333fad53 YH |
1059 | case IPV6_2292DSTOPTS: |
1060 | val = np->rxopt.bits.odstopts; | |
1061 | break; | |
1062 | ||
41a1f8ea YH |
1063 | case IPV6_TCLASS: |
1064 | val = np->tclass; | |
1065 | break; | |
1066 | ||
1067 | case IPV6_RECVTCLASS: | |
1068 | val = np->rxopt.bits.rxtclass; | |
1069 | break; | |
1070 | ||
1da177e4 LT |
1071 | case IPV6_FLOWINFO: |
1072 | val = np->rxopt.bits.rxflow; | |
1073 | break; | |
1074 | ||
793b1473 BH |
1075 | case IPV6_RECVPATHMTU: |
1076 | val = np->rxopt.bits.rxpmtu; | |
1077 | break; | |
1078 | ||
1079 | case IPV6_PATHMTU: | |
1080 | { | |
1081 | struct dst_entry *dst; | |
1082 | struct ip6_mtuinfo mtuinfo; | |
1083 | ||
1084 | if (len < sizeof(mtuinfo)) | |
1085 | return -EINVAL; | |
1086 | ||
1087 | len = sizeof(mtuinfo); | |
1088 | memset(&mtuinfo, 0, sizeof(mtuinfo)); | |
1089 | ||
1090 | rcu_read_lock(); | |
1091 | dst = __sk_dst_get(sk); | |
1092 | if (dst) | |
1093 | mtuinfo.ip6m_mtu = dst_mtu(dst); | |
1094 | rcu_read_unlock(); | |
1095 | if (!mtuinfo.ip6m_mtu) | |
1096 | return -ENOTCONN; | |
1097 | ||
1098 | if (put_user(len, optlen)) | |
1099 | return -EFAULT; | |
1100 | if (copy_to_user(optval, &mtuinfo, len)) | |
1101 | return -EFAULT; | |
1102 | ||
1103 | return 0; | |
1104 | break; | |
1105 | } | |
1106 | ||
1da177e4 | 1107 | case IPV6_UNICAST_HOPS: |
1da177e4 | 1108 | case IPV6_MULTICAST_HOPS: |
befffe90 BH |
1109 | { |
1110 | struct dst_entry *dst; | |
1111 | ||
1112 | if (optname == IPV6_UNICAST_HOPS) | |
1113 | val = np->hop_limit; | |
1114 | else | |
1115 | val = np->mcast_hops; | |
1116 | ||
b6c6712a ED |
1117 | if (val < 0) { |
1118 | rcu_read_lock(); | |
1119 | dst = __sk_dst_get(sk); | |
1120 | if (dst) | |
6b75d090 | 1121 | val = ip6_dst_hoplimit(dst); |
b6c6712a | 1122 | rcu_read_unlock(); |
befffe90 | 1123 | } |
b6c6712a | 1124 | |
befffe90 | 1125 | if (val < 0) |
53b7997f | 1126 | val = sock_net(sk)->ipv6.devconf_all->hop_limit; |
1da177e4 | 1127 | break; |
befffe90 | 1128 | } |
1da177e4 LT |
1129 | |
1130 | case IPV6_MULTICAST_LOOP: | |
1131 | val = np->mc_loop; | |
1132 | break; | |
1133 | ||
1134 | case IPV6_MULTICAST_IF: | |
1135 | val = np->mcast_oif; | |
1136 | break; | |
1137 | ||
1138 | case IPV6_MTU_DISCOVER: | |
1139 | val = np->pmtudisc; | |
1140 | break; | |
1141 | ||
1142 | case IPV6_RECVERR: | |
1143 | val = np->recverr; | |
1144 | break; | |
1145 | ||
1146 | case IPV6_FLOWINFO_SEND: | |
1147 | val = np->sndflow; | |
1148 | break; | |
1149 | ||
7cbca67c YH |
1150 | case IPV6_ADDR_PREFERENCES: |
1151 | val = 0; | |
1152 | ||
1153 | if (np->srcprefs & IPV6_PREFER_SRC_TMP) | |
1154 | val |= IPV6_PREFER_SRC_TMP; | |
1155 | else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) | |
1156 | val |= IPV6_PREFER_SRC_PUBLIC; | |
1157 | else { | |
1158 | /* XXX: should we return system default? */ | |
1159 | val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; | |
1160 | } | |
1161 | ||
1162 | if (np->srcprefs & IPV6_PREFER_SRC_COA) | |
1163 | val |= IPV6_PREFER_SRC_COA; | |
1164 | else | |
1165 | val |= IPV6_PREFER_SRC_HOME; | |
1166 | break; | |
e802af9c SH |
1167 | |
1168 | case IPV6_MINHOPCOUNT: | |
1169 | val = np->min_hopcount; | |
1170 | break; | |
793b1473 BH |
1171 | |
1172 | case IPV6_DONTFRAG: | |
1173 | val = np->dontfrag; | |
1174 | break; | |
7cbca67c | 1175 | |
1da177e4 | 1176 | default: |
cf6fc4a9 | 1177 | return -ENOPROTOOPT; |
1da177e4 LT |
1178 | } |
1179 | len = min_t(unsigned int, sizeof(int), len); | |
1180 | if(put_user(len, optlen)) | |
1181 | return -EFAULT; | |
1182 | if(copy_to_user(optval,&val,len)) | |
1183 | return -EFAULT; | |
1184 | return 0; | |
1185 | } | |
1186 | ||
3fdadf7d DM |
1187 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1188 | char __user *optval, int __user *optlen) | |
1189 | { | |
1190 | int err; | |
1191 | ||
1192 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
1193 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
1194 | ||
1195 | if(level != SOL_IPV6) | |
1196 | return -ENOPROTOOPT; | |
1197 | ||
1198 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); | |
1199 | #ifdef CONFIG_NETFILTER | |
cf6fc4a9 WY |
1200 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1201 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1202 | int len; |
1203 | ||
1204 | if (get_user(len, optlen)) | |
1205 | return -EFAULT; | |
1206 | ||
1207 | lock_sock(sk); | |
1208 | err = nf_getsockopt(sk, PF_INET6, optname, optval, | |
1209 | &len); | |
1210 | release_sock(sk); | |
1211 | if (err >= 0) | |
1212 | err = put_user(len, optlen); | |
1213 | } | |
1214 | #endif | |
1215 | return err; | |
1216 | } | |
1217 | ||
7159039a YH |
1218 | EXPORT_SYMBOL(ipv6_getsockopt); |
1219 | ||
3fdadf7d DM |
1220 | #ifdef CONFIG_COMPAT |
1221 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1222 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
1223 | { |
1224 | int err; | |
1225 | ||
1226 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
1227 | if (udp_prot.compat_getsockopt != NULL) |
1228 | return udp_prot.compat_getsockopt(sk, level, optname, | |
1229 | optval, optlen); | |
1230 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
1231 | } |
1232 | ||
543d9cfe | 1233 | if (level != SOL_IPV6) |
3fdadf7d DM |
1234 | return -ENOPROTOOPT; |
1235 | ||
80991790 PE |
1236 | if (optname == MCAST_MSFILTER) |
1237 | return compat_mc_getsockopt(sk, level, optname, optval, optlen, | |
1238 | ipv6_getsockopt); | |
1239 | ||
3fdadf7d DM |
1240 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); |
1241 | #ifdef CONFIG_NETFILTER | |
cf6fc4a9 WY |
1242 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1243 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1244 | int len; |
1245 | ||
1246 | if (get_user(len, optlen)) | |
1247 | return -EFAULT; | |
1248 | ||
1249 | lock_sock(sk); | |
543d9cfe ACM |
1250 | err = compat_nf_getsockopt(sk, PF_INET6, |
1251 | optname, optval, &len); | |
3fdadf7d DM |
1252 | release_sock(sk); |
1253 | if (err >= 0) | |
1254 | err = put_user(len, optlen); | |
1255 | } | |
1256 | #endif | |
1257 | return err; | |
1258 | } | |
543d9cfe ACM |
1259 | |
1260 | EXPORT_SYMBOL(compat_ipv6_getsockopt); | |
3fdadf7d DM |
1261 | #endif |
1262 |