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 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 | ||
6c468622 BS |
345 | case IPV6_TRANSPARENT: |
346 | if (optlen < sizeof(int)) | |
347 | goto e_inval; | |
348 | /* we don't have a separate transparent bit for IPV6 we use the one in the IPv4 socket */ | |
349 | inet_sk(sk)->transparent = valbool; | |
350 | retv = 0; | |
351 | break; | |
352 | ||
353 | case IPV6_RECVORIGDSTADDR: | |
354 | if (optlen < sizeof(int)) | |
355 | goto e_inval; | |
356 | np->rxopt.bits.rxorigdstaddr = valbool; | |
357 | retv = 0; | |
358 | break; | |
359 | ||
333fad53 YH |
360 | case IPV6_HOPOPTS: |
361 | case IPV6_RTHDRDSTOPTS: | |
362 | case IPV6_RTHDR: | |
363 | case IPV6_DSTOPTS: | |
364 | { | |
365 | struct ipv6_txoptions *opt; | |
aea7427f SW |
366 | |
367 | /* remove any sticky options header with a zero option | |
368 | * length, per RFC3542. | |
369 | */ | |
333fad53 | 370 | if (optlen == 0) |
cb422c46 | 371 | optval = NULL; |
cfb266c0 YH |
372 | else if (optval == NULL) |
373 | goto e_inval; | |
aea7427f SW |
374 | else if (optlen < sizeof(struct ipv6_opt_hdr) || |
375 | optlen & 0x7 || optlen > 8 * 255) | |
376 | goto e_inval; | |
333fad53 YH |
377 | |
378 | /* hop-by-hop / destination options are privileged option */ | |
379 | retv = -EPERM; | |
380 | if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW)) | |
381 | break; | |
382 | ||
333fad53 YH |
383 | opt = ipv6_renew_options(sk, np->opt, optname, |
384 | (struct ipv6_opt_hdr __user *)optval, | |
385 | optlen); | |
386 | if (IS_ERR(opt)) { | |
387 | retv = PTR_ERR(opt); | |
388 | break; | |
389 | } | |
390 | ||
391 | /* routing header option needs extra check */ | |
6e093d9d | 392 | retv = -EINVAL; |
dfee0a72 | 393 | if (optname == IPV6_RTHDR && opt && opt->srcrt) { |
333fad53 | 394 | struct ipv6_rt_hdr *rthdr = opt->srcrt; |
280a9d34 | 395 | switch (rthdr->type) { |
59fbb3a6 | 396 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
280a9d34 | 397 | case IPV6_SRCRT_TYPE_2: |
6e093d9d BH |
398 | if (rthdr->hdrlen != 2 || |
399 | rthdr->segments_left != 1) | |
400 | goto sticky_done; | |
401 | ||
280a9d34 | 402 | break; |
bb4dbf9e | 403 | #endif |
280a9d34 | 404 | default: |
333fad53 | 405 | goto sticky_done; |
280a9d34 | 406 | } |
333fad53 YH |
407 | } |
408 | ||
409 | retv = 0; | |
e7712f1a | 410 | opt = ipv6_update_options(sk, opt); |
333fad53 YH |
411 | sticky_done: |
412 | if (opt) | |
413 | sock_kfree_s(sk, opt, opt->tot_len); | |
414 | break; | |
415 | } | |
416 | ||
b24a2516 YH |
417 | case IPV6_PKTINFO: |
418 | { | |
419 | struct in6_pktinfo pkt; | |
420 | ||
421 | if (optlen == 0) | |
422 | goto e_inval; | |
423 | else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL) | |
424 | goto e_inval; | |
425 | ||
914d1164 | 426 | if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) { |
b24a2516 YH |
427 | retv = -EFAULT; |
428 | break; | |
429 | } | |
430 | if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if) | |
431 | goto e_inval; | |
432 | ||
433 | np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex; | |
434 | ipv6_addr_copy(&np->sticky_pktinfo.ipi6_addr, &pkt.ipi6_addr); | |
435 | retv = 0; | |
436 | break; | |
437 | } | |
438 | ||
333fad53 | 439 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
440 | { |
441 | struct ipv6_txoptions *opt = NULL; | |
442 | struct msghdr msg; | |
443 | struct flowi fl; | |
444 | int junk; | |
445 | ||
446 | fl.fl6_flowlabel = 0; | |
447 | fl.oif = sk->sk_bound_dev_if; | |
51953d5b | 448 | fl.mark = sk->sk_mark; |
1da177e4 LT |
449 | |
450 | if (optlen == 0) | |
451 | goto update; | |
452 | ||
453 | /* 1K is probably excessive | |
454 | * 1K is surely not enough, 2K per standard header is 16K. | |
455 | */ | |
456 | retv = -EINVAL; | |
457 | if (optlen > 64*1024) | |
458 | break; | |
459 | ||
460 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
461 | retv = -ENOBUFS; | |
462 | if (opt == NULL) | |
463 | break; | |
464 | ||
465 | memset(opt, 0, sizeof(*opt)); | |
466 | opt->tot_len = sizeof(*opt) + optlen; | |
467 | retv = -EFAULT; | |
468 | if (copy_from_user(opt+1, optval, optlen)) | |
469 | goto done; | |
470 | ||
471 | msg.msg_controllen = optlen; | |
472 | msg.msg_control = (void*)(opt+1); | |
473 | ||
13b52cd4 BH |
474 | retv = datagram_send_ctl(net, &msg, &fl, opt, &junk, &junk, |
475 | &junk); | |
1da177e4 LT |
476 | if (retv) |
477 | goto done; | |
478 | update: | |
479 | retv = 0; | |
e7712f1a | 480 | opt = ipv6_update_options(sk, opt); |
1da177e4 LT |
481 | done: |
482 | if (opt) | |
483 | sock_kfree_s(sk, opt, opt->tot_len); | |
484 | break; | |
485 | } | |
486 | case IPV6_UNICAST_HOPS: | |
b2a9d7c2 YH |
487 | if (optlen < sizeof(int)) |
488 | goto e_inval; | |
1da177e4 LT |
489 | if (val > 255 || val < -1) |
490 | goto e_inval; | |
491 | np->hop_limit = val; | |
492 | retv = 0; | |
493 | break; | |
494 | ||
495 | case IPV6_MULTICAST_HOPS: | |
496 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 497 | break; |
b2a9d7c2 YH |
498 | if (optlen < sizeof(int)) |
499 | goto e_inval; | |
1da177e4 LT |
500 | if (val > 255 || val < -1) |
501 | goto e_inval; | |
502 | np->mcast_hops = val; | |
503 | retv = 0; | |
504 | break; | |
505 | ||
506 | case IPV6_MULTICAST_LOOP: | |
b2a9d7c2 YH |
507 | if (optlen < sizeof(int)) |
508 | goto e_inval; | |
28d44882 YH |
509 | if (val != valbool) |
510 | goto e_inval; | |
1da177e4 LT |
511 | np->mc_loop = valbool; |
512 | retv = 0; | |
513 | break; | |
514 | ||
515 | case IPV6_MULTICAST_IF: | |
516 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 517 | break; |
b2a9d7c2 YH |
518 | if (optlen < sizeof(int)) |
519 | goto e_inval; | |
1da177e4 | 520 | |
4953f0fc | 521 | if (val) { |
55b80503 ED |
522 | struct net_device *dev; |
523 | ||
4953f0fc BH |
524 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) |
525 | goto e_inval; | |
526 | ||
55b80503 ED |
527 | dev = dev_get_by_index(net, val); |
528 | if (!dev) { | |
4953f0fc BH |
529 | retv = -ENODEV; |
530 | break; | |
531 | } | |
55b80503 | 532 | dev_put(dev); |
1da177e4 LT |
533 | } |
534 | np->mcast_oif = val; | |
535 | retv = 0; | |
536 | break; | |
537 | case IPV6_ADD_MEMBERSHIP: | |
538 | case IPV6_DROP_MEMBERSHIP: | |
539 | { | |
540 | struct ipv6_mreq mreq; | |
541 | ||
a28398ba WC |
542 | if (optlen < sizeof(struct ipv6_mreq)) |
543 | goto e_inval; | |
544 | ||
a96fb49b FL |
545 | retv = -EPROTO; |
546 | if (inet_sk(sk)->is_icsk) | |
547 | break; | |
548 | ||
1da177e4 LT |
549 | retv = -EFAULT; |
550 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
551 | break; | |
552 | ||
553 | if (optname == IPV6_ADD_MEMBERSHIP) | |
554 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
555 | else | |
556 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
557 | break; | |
558 | } | |
559 | case IPV6_JOIN_ANYCAST: | |
560 | case IPV6_LEAVE_ANYCAST: | |
561 | { | |
562 | struct ipv6_mreq mreq; | |
563 | ||
a28398ba | 564 | if (optlen < sizeof(struct ipv6_mreq)) |
1da177e4 LT |
565 | goto e_inval; |
566 | ||
567 | retv = -EFAULT; | |
568 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
569 | break; | |
570 | ||
571 | if (optname == IPV6_JOIN_ANYCAST) | |
572 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
573 | else | |
574 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
575 | break; | |
576 | } | |
577 | case MCAST_JOIN_GROUP: | |
578 | case MCAST_LEAVE_GROUP: | |
579 | { | |
580 | struct group_req greq; | |
581 | struct sockaddr_in6 *psin6; | |
582 | ||
a28398ba WC |
583 | if (optlen < sizeof(struct group_req)) |
584 | goto e_inval; | |
585 | ||
1da177e4 LT |
586 | retv = -EFAULT; |
587 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
588 | break; | |
589 | if (greq.gr_group.ss_family != AF_INET6) { | |
590 | retv = -EADDRNOTAVAIL; | |
591 | break; | |
592 | } | |
593 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
594 | if (optname == MCAST_JOIN_GROUP) | |
595 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, | |
596 | &psin6->sin6_addr); | |
597 | else | |
598 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, | |
599 | &psin6->sin6_addr); | |
600 | break; | |
601 | } | |
602 | case MCAST_JOIN_SOURCE_GROUP: | |
603 | case MCAST_LEAVE_SOURCE_GROUP: | |
604 | case MCAST_BLOCK_SOURCE: | |
605 | case MCAST_UNBLOCK_SOURCE: | |
606 | { | |
607 | struct group_source_req greqs; | |
608 | int omode, add; | |
609 | ||
a28398ba | 610 | if (optlen < sizeof(struct group_source_req)) |
1da177e4 LT |
611 | goto e_inval; |
612 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
613 | retv = -EFAULT; | |
614 | break; | |
615 | } | |
616 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
617 | greqs.gsr_source.ss_family != AF_INET6) { | |
618 | retv = -EADDRNOTAVAIL; | |
619 | break; | |
620 | } | |
621 | if (optname == MCAST_BLOCK_SOURCE) { | |
622 | omode = MCAST_EXCLUDE; | |
623 | add = 1; | |
624 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
625 | omode = MCAST_EXCLUDE; | |
626 | add = 0; | |
627 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
628 | struct sockaddr_in6 *psin6; | |
629 | ||
630 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
631 | retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, | |
632 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
633 | /* prior join w/ different source is ok */ |
634 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
635 | break; |
636 | omode = MCAST_INCLUDE; | |
637 | add = 1; | |
c9e3e8b6 | 638 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
639 | omode = MCAST_INCLUDE; |
640 | add = 0; | |
641 | } | |
642 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
643 | break; | |
644 | } | |
645 | case MCAST_MSFILTER: | |
646 | { | |
1da177e4 LT |
647 | extern int sysctl_mld_max_msf; |
648 | struct group_filter *gsf; | |
649 | ||
650 | if (optlen < GROUP_FILTER_SIZE(0)) | |
651 | goto e_inval; | |
652 | if (optlen > sysctl_optmem_max) { | |
653 | retv = -ENOBUFS; | |
654 | break; | |
655 | } | |
8b3a7005 | 656 | gsf = kmalloc(optlen,GFP_KERNEL); |
cfcabdcc | 657 | if (!gsf) { |
1da177e4 LT |
658 | retv = -ENOBUFS; |
659 | break; | |
660 | } | |
661 | retv = -EFAULT; | |
662 | if (copy_from_user(gsf, optval, optlen)) { | |
663 | kfree(gsf); | |
664 | break; | |
665 | } | |
666 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
667 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
668 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
669 | kfree(gsf); | |
670 | retv = -ENOBUFS; | |
671 | break; | |
672 | } | |
673 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
674 | kfree(gsf); | |
675 | retv = -EINVAL; | |
676 | break; | |
677 | } | |
678 | retv = ip6_mc_msfilter(sk, gsf); | |
679 | kfree(gsf); | |
680 | ||
681 | break; | |
682 | } | |
683 | case IPV6_ROUTER_ALERT: | |
b2a9d7c2 YH |
684 | if (optlen < sizeof(int)) |
685 | goto e_inval; | |
725a8ff0 | 686 | retv = ip6_ra_control(sk, val); |
1da177e4 LT |
687 | break; |
688 | case IPV6_MTU_DISCOVER: | |
b2a9d7c2 YH |
689 | if (optlen < sizeof(int)) |
690 | goto e_inval; | |
0eae750e | 691 | if (val < IP_PMTUDISC_DONT || val > IP_PMTUDISC_PROBE) |
1da177e4 LT |
692 | goto e_inval; |
693 | np->pmtudisc = val; | |
694 | retv = 0; | |
695 | break; | |
696 | case IPV6_MTU: | |
b2a9d7c2 YH |
697 | if (optlen < sizeof(int)) |
698 | goto e_inval; | |
1da177e4 LT |
699 | if (val && val < IPV6_MIN_MTU) |
700 | goto e_inval; | |
701 | np->frag_size = val; | |
702 | retv = 0; | |
703 | break; | |
704 | case IPV6_RECVERR: | |
b2a9d7c2 YH |
705 | if (optlen < sizeof(int)) |
706 | goto e_inval; | |
1da177e4 LT |
707 | np->recverr = valbool; |
708 | if (!val) | |
709 | skb_queue_purge(&sk->sk_error_queue); | |
710 | retv = 0; | |
711 | break; | |
712 | case IPV6_FLOWINFO_SEND: | |
b2a9d7c2 YH |
713 | if (optlen < sizeof(int)) |
714 | goto e_inval; | |
1da177e4 LT |
715 | np->sndflow = valbool; |
716 | retv = 0; | |
717 | break; | |
718 | case IPV6_FLOWLABEL_MGR: | |
719 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
720 | break; | |
721 | case IPV6_IPSEC_POLICY: | |
722 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 HX |
723 | retv = -EPERM; |
724 | if (!capable(CAP_NET_ADMIN)) | |
725 | break; | |
1da177e4 LT |
726 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
727 | break; | |
728 | ||
7cbca67c YH |
729 | case IPV6_ADDR_PREFERENCES: |
730 | { | |
731 | unsigned int pref = 0; | |
732 | unsigned int prefmask = ~0; | |
733 | ||
b2a9d7c2 YH |
734 | if (optlen < sizeof(int)) |
735 | goto e_inval; | |
736 | ||
7cbca67c YH |
737 | retv = -EINVAL; |
738 | ||
739 | /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ | |
740 | switch (val & (IPV6_PREFER_SRC_PUBLIC| | |
741 | IPV6_PREFER_SRC_TMP| | |
742 | IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { | |
743 | case IPV6_PREFER_SRC_PUBLIC: | |
744 | pref |= IPV6_PREFER_SRC_PUBLIC; | |
745 | break; | |
746 | case IPV6_PREFER_SRC_TMP: | |
747 | pref |= IPV6_PREFER_SRC_TMP; | |
748 | break; | |
749 | case IPV6_PREFER_SRC_PUBTMP_DEFAULT: | |
750 | break; | |
751 | case 0: | |
752 | goto pref_skip_pubtmp; | |
753 | default: | |
754 | goto e_inval; | |
755 | } | |
756 | ||
757 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| | |
758 | IPV6_PREFER_SRC_TMP); | |
759 | pref_skip_pubtmp: | |
760 | ||
761 | /* check HOME/COA conflicts */ | |
762 | switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { | |
763 | case IPV6_PREFER_SRC_HOME: | |
764 | break; | |
765 | case IPV6_PREFER_SRC_COA: | |
766 | pref |= IPV6_PREFER_SRC_COA; | |
767 | case 0: | |
768 | goto pref_skip_coa; | |
769 | default: | |
770 | goto e_inval; | |
771 | } | |
772 | ||
773 | prefmask &= ~IPV6_PREFER_SRC_COA; | |
774 | pref_skip_coa: | |
775 | ||
776 | /* check CGA/NONCGA conflicts */ | |
777 | switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { | |
778 | case IPV6_PREFER_SRC_CGA: | |
779 | case IPV6_PREFER_SRC_NONCGA: | |
780 | case 0: | |
781 | break; | |
782 | default: | |
783 | goto e_inval; | |
784 | } | |
785 | ||
786 | np->srcprefs = (np->srcprefs & prefmask) | pref; | |
787 | retv = 0; | |
788 | ||
789 | break; | |
790 | } | |
e802af9c SH |
791 | case IPV6_MINHOPCOUNT: |
792 | if (optlen < sizeof(int)) | |
793 | goto e_inval; | |
794 | if (val < 0 || val > 255) | |
795 | goto e_inval; | |
796 | np->min_hopcount = val; | |
793b1473 BH |
797 | break; |
798 | case IPV6_DONTFRAG: | |
799 | np->dontfrag = valbool; | |
e802af9c SH |
800 | retv = 0; |
801 | break; | |
1da177e4 | 802 | } |
7cbca67c | 803 | |
1da177e4 LT |
804 | release_sock(sk); |
805 | ||
1da177e4 LT |
806 | return retv; |
807 | ||
808 | e_inval: | |
809 | release_sock(sk); | |
810 | return -EINVAL; | |
811 | } | |
812 | ||
3fdadf7d | 813 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 814 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
815 | { |
816 | int err; | |
817 | ||
818 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
819 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
820 | ||
821 | if (level != SOL_IPV6) | |
822 | return -ENOPROTOOPT; | |
823 | ||
824 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
825 | #ifdef CONFIG_NETFILTER | |
826 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
827 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
828 | optname != IPV6_XFRM_POLICY) { | |
829 | lock_sock(sk); | |
830 | err = nf_setsockopt(sk, PF_INET6, optname, optval, | |
831 | optlen); | |
832 | release_sock(sk); | |
833 | } | |
834 | #endif | |
835 | return err; | |
836 | } | |
837 | ||
7159039a | 838 | EXPORT_SYMBOL(ipv6_setsockopt); |
3fdadf7d DM |
839 | |
840 | #ifdef CONFIG_COMPAT | |
841 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
b7058842 | 842 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
843 | { |
844 | int err; | |
845 | ||
846 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
847 | if (udp_prot.compat_setsockopt != NULL) |
848 | return udp_prot.compat_setsockopt(sk, level, optname, | |
849 | optval, optlen); | |
850 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
851 | } |
852 | ||
853 | if (level != SOL_IPV6) | |
854 | return -ENOPROTOOPT; | |
855 | ||
dae50295 DS |
856 | if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) |
857 | return compat_mc_setsockopt(sk, level, optname, optval, optlen, | |
858 | ipv6_setsockopt); | |
859 | ||
3fdadf7d DM |
860 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); |
861 | #ifdef CONFIG_NETFILTER | |
862 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
863 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
543d9cfe | 864 | optname != IPV6_XFRM_POLICY) { |
3fdadf7d | 865 | lock_sock(sk); |
543d9cfe ACM |
866 | err = compat_nf_setsockopt(sk, PF_INET6, optname, |
867 | optval, optlen); | |
3fdadf7d DM |
868 | release_sock(sk); |
869 | } | |
870 | #endif | |
871 | return err; | |
872 | } | |
543d9cfe ACM |
873 | |
874 | EXPORT_SYMBOL(compat_ipv6_setsockopt); | |
3fdadf7d DM |
875 | #endif |
876 | ||
28693079 | 877 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, |
4c6510a7 | 878 | int optname, char __user *optval, int len) |
333fad53 | 879 | { |
28693079 DM |
880 | struct ipv6_opt_hdr *hdr; |
881 | ||
4c6510a7 YH |
882 | if (!opt) |
883 | return 0; | |
884 | ||
885 | switch(optname) { | |
886 | case IPV6_HOPOPTS: | |
887 | hdr = opt->hopopt; | |
888 | break; | |
889 | case IPV6_RTHDRDSTOPTS: | |
890 | hdr = opt->dst0opt; | |
891 | break; | |
892 | case IPV6_RTHDR: | |
893 | hdr = (struct ipv6_opt_hdr *)opt->srcrt; | |
894 | break; | |
895 | case IPV6_DSTOPTS: | |
896 | hdr = opt->dst1opt; | |
897 | break; | |
898 | default: | |
899 | return -EINVAL; /* should not happen */ | |
900 | } | |
901 | ||
902 | if (!hdr) | |
333fad53 | 903 | return 0; |
28693079 | 904 | |
d2b02ed9 | 905 | len = min_t(unsigned int, len, ipv6_optlen(hdr)); |
660adc6e | 906 | if (copy_to_user(optval, hdr, len)) |
333fad53 | 907 | return -EFAULT; |
95b496b6 | 908 | return len; |
333fad53 YH |
909 | } |
910 | ||
3fdadf7d | 911 | static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
912 | char __user *optval, int __user *optlen) |
913 | { | |
914 | struct ipv6_pinfo *np = inet6_sk(sk); | |
915 | int len; | |
916 | int val; | |
917 | ||
7bc570c8 YH |
918 | if (ip6_mroute_opt(optname)) |
919 | return ip6_mroute_getsockopt(sk, optname, optval, optlen); | |
920 | ||
1da177e4 LT |
921 | if (get_user(len, optlen)) |
922 | return -EFAULT; | |
923 | switch (optname) { | |
924 | case IPV6_ADDRFORM: | |
925 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 926 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 | 927 | sk->sk_protocol != IPPROTO_TCP) |
1717699c | 928 | return -ENOPROTOOPT; |
1da177e4 LT |
929 | if (sk->sk_state != TCP_ESTABLISHED) |
930 | return -ENOTCONN; | |
931 | val = sk->sk_family; | |
932 | break; | |
933 | case MCAST_MSFILTER: | |
934 | { | |
935 | struct group_filter gsf; | |
936 | int err; | |
937 | ||
938 | if (len < GROUP_FILTER_SIZE(0)) | |
939 | return -EINVAL; | |
940 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
941 | return -EFAULT; | |
20c61fbd YH |
942 | if (gsf.gf_group.ss_family != AF_INET6) |
943 | return -EADDRNOTAVAIL; | |
1da177e4 LT |
944 | lock_sock(sk); |
945 | err = ip6_mc_msfget(sk, &gsf, | |
946 | (struct group_filter __user *)optval, optlen); | |
947 | release_sock(sk); | |
948 | return err; | |
949 | } | |
950 | ||
333fad53 | 951 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
952 | { |
953 | struct msghdr msg; | |
954 | struct sk_buff *skb; | |
955 | ||
956 | if (sk->sk_type != SOCK_STREAM) | |
957 | return -ENOPROTOOPT; | |
958 | ||
959 | msg.msg_control = optval; | |
960 | msg.msg_controllen = len; | |
961 | msg.msg_flags = 0; | |
962 | ||
963 | lock_sock(sk); | |
964 | skb = np->pktoptions; | |
965 | if (skb) | |
966 | atomic_inc(&skb->users); | |
967 | release_sock(sk); | |
968 | ||
969 | if (skb) { | |
970 | int err = datagram_recv_ctl(sk, &msg, skb); | |
971 | kfree_skb(skb); | |
972 | if (err) | |
973 | return err; | |
974 | } else { | |
975 | if (np->rxopt.bits.rxinfo) { | |
976 | struct in6_pktinfo src_info; | |
f250dcda YH |
977 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
978 | np->sticky_pktinfo.ipi6_ifindex; | |
979 | np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) : | |
980 | ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr)); | |
1da177e4 LT |
981 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); |
982 | } | |
983 | if (np->rxopt.bits.rxhlim) { | |
984 | int hlim = np->mcast_hops; | |
985 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
986 | } | |
333fad53 YH |
987 | if (np->rxopt.bits.rxoinfo) { |
988 | struct in6_pktinfo src_info; | |
f250dcda YH |
989 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
990 | np->sticky_pktinfo.ipi6_ifindex; | |
991 | np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) : | |
992 | ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr)); | |
333fad53 YH |
993 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); |
994 | } | |
995 | if (np->rxopt.bits.rxohlim) { | |
996 | int hlim = np->mcast_hops; | |
997 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
998 | } | |
1da177e4 LT |
999 | } |
1000 | len -= msg.msg_controllen; | |
1001 | return put_user(len, optlen); | |
1002 | } | |
1003 | case IPV6_MTU: | |
1004 | { | |
1005 | struct dst_entry *dst; | |
b6c6712a | 1006 | |
1ab1457c | 1007 | val = 0; |
b6c6712a ED |
1008 | rcu_read_lock(); |
1009 | dst = __sk_dst_get(sk); | |
1010 | if (dst) | |
1da177e4 | 1011 | val = dst_mtu(dst); |
b6c6712a | 1012 | rcu_read_unlock(); |
1da177e4 LT |
1013 | if (!val) |
1014 | return -ENOTCONN; | |
1015 | break; | |
1016 | } | |
1017 | ||
1018 | case IPV6_V6ONLY: | |
1019 | val = np->ipv6only; | |
1020 | break; | |
1021 | ||
333fad53 | 1022 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
1023 | val = np->rxopt.bits.rxinfo; |
1024 | break; | |
1025 | ||
333fad53 YH |
1026 | case IPV6_2292PKTINFO: |
1027 | val = np->rxopt.bits.rxoinfo; | |
1028 | break; | |
1029 | ||
1030 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
1031 | val = np->rxopt.bits.rxhlim; |
1032 | break; | |
1033 | ||
333fad53 YH |
1034 | case IPV6_2292HOPLIMIT: |
1035 | val = np->rxopt.bits.rxohlim; | |
1036 | break; | |
1037 | ||
1038 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
1039 | val = np->rxopt.bits.srcrt; |
1040 | break; | |
1041 | ||
333fad53 YH |
1042 | case IPV6_2292RTHDR: |
1043 | val = np->rxopt.bits.osrcrt; | |
1044 | break; | |
1045 | ||
1da177e4 | 1046 | case IPV6_HOPOPTS: |
333fad53 YH |
1047 | case IPV6_RTHDRDSTOPTS: |
1048 | case IPV6_RTHDR: | |
1049 | case IPV6_DSTOPTS: | |
1050 | { | |
1051 | ||
1052 | lock_sock(sk); | |
28693079 | 1053 | len = ipv6_getsockopt_sticky(sk, np->opt, |
4c6510a7 | 1054 | optname, optval, len); |
333fad53 | 1055 | release_sock(sk); |
05335c22 YH |
1056 | /* check if ipv6_getsockopt_sticky() returns err code */ |
1057 | if (len < 0) | |
1058 | return len; | |
333fad53 YH |
1059 | return put_user(len, optlen); |
1060 | } | |
1061 | ||
1062 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
1063 | val = np->rxopt.bits.hopopts; |
1064 | break; | |
1065 | ||
333fad53 YH |
1066 | case IPV6_2292HOPOPTS: |
1067 | val = np->rxopt.bits.ohopopts; | |
1068 | break; | |
1069 | ||
1070 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
1071 | val = np->rxopt.bits.dstopts; |
1072 | break; | |
1073 | ||
333fad53 YH |
1074 | case IPV6_2292DSTOPTS: |
1075 | val = np->rxopt.bits.odstopts; | |
1076 | break; | |
1077 | ||
41a1f8ea YH |
1078 | case IPV6_TCLASS: |
1079 | val = np->tclass; | |
1080 | break; | |
1081 | ||
1082 | case IPV6_RECVTCLASS: | |
1083 | val = np->rxopt.bits.rxtclass; | |
1084 | break; | |
1085 | ||
1da177e4 LT |
1086 | case IPV6_FLOWINFO: |
1087 | val = np->rxopt.bits.rxflow; | |
1088 | break; | |
1089 | ||
793b1473 BH |
1090 | case IPV6_RECVPATHMTU: |
1091 | val = np->rxopt.bits.rxpmtu; | |
1092 | break; | |
1093 | ||
1094 | case IPV6_PATHMTU: | |
1095 | { | |
1096 | struct dst_entry *dst; | |
1097 | struct ip6_mtuinfo mtuinfo; | |
1098 | ||
1099 | if (len < sizeof(mtuinfo)) | |
1100 | return -EINVAL; | |
1101 | ||
1102 | len = sizeof(mtuinfo); | |
1103 | memset(&mtuinfo, 0, sizeof(mtuinfo)); | |
1104 | ||
1105 | rcu_read_lock(); | |
1106 | dst = __sk_dst_get(sk); | |
1107 | if (dst) | |
1108 | mtuinfo.ip6m_mtu = dst_mtu(dst); | |
1109 | rcu_read_unlock(); | |
1110 | if (!mtuinfo.ip6m_mtu) | |
1111 | return -ENOTCONN; | |
1112 | ||
1113 | if (put_user(len, optlen)) | |
1114 | return -EFAULT; | |
1115 | if (copy_to_user(optval, &mtuinfo, len)) | |
1116 | return -EFAULT; | |
1117 | ||
1118 | return 0; | |
1119 | break; | |
1120 | } | |
1121 | ||
6c468622 BS |
1122 | case IPV6_TRANSPARENT: |
1123 | val = inet_sk(sk)->transparent; | |
1124 | break; | |
1125 | ||
1126 | case IPV6_RECVORIGDSTADDR: | |
1127 | val = np->rxopt.bits.rxorigdstaddr; | |
1128 | break; | |
1129 | ||
1da177e4 | 1130 | case IPV6_UNICAST_HOPS: |
1da177e4 | 1131 | case IPV6_MULTICAST_HOPS: |
befffe90 BH |
1132 | { |
1133 | struct dst_entry *dst; | |
1134 | ||
1135 | if (optname == IPV6_UNICAST_HOPS) | |
1136 | val = np->hop_limit; | |
1137 | else | |
1138 | val = np->mcast_hops; | |
1139 | ||
b6c6712a ED |
1140 | if (val < 0) { |
1141 | rcu_read_lock(); | |
1142 | dst = __sk_dst_get(sk); | |
1143 | if (dst) | |
6b75d090 | 1144 | val = ip6_dst_hoplimit(dst); |
b6c6712a | 1145 | rcu_read_unlock(); |
befffe90 | 1146 | } |
b6c6712a | 1147 | |
befffe90 | 1148 | if (val < 0) |
53b7997f | 1149 | val = sock_net(sk)->ipv6.devconf_all->hop_limit; |
1da177e4 | 1150 | break; |
befffe90 | 1151 | } |
1da177e4 LT |
1152 | |
1153 | case IPV6_MULTICAST_LOOP: | |
1154 | val = np->mc_loop; | |
1155 | break; | |
1156 | ||
1157 | case IPV6_MULTICAST_IF: | |
1158 | val = np->mcast_oif; | |
1159 | break; | |
1160 | ||
1161 | case IPV6_MTU_DISCOVER: | |
1162 | val = np->pmtudisc; | |
1163 | break; | |
1164 | ||
1165 | case IPV6_RECVERR: | |
1166 | val = np->recverr; | |
1167 | break; | |
1168 | ||
1169 | case IPV6_FLOWINFO_SEND: | |
1170 | val = np->sndflow; | |
1171 | break; | |
1172 | ||
7cbca67c YH |
1173 | case IPV6_ADDR_PREFERENCES: |
1174 | val = 0; | |
1175 | ||
1176 | if (np->srcprefs & IPV6_PREFER_SRC_TMP) | |
1177 | val |= IPV6_PREFER_SRC_TMP; | |
1178 | else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) | |
1179 | val |= IPV6_PREFER_SRC_PUBLIC; | |
1180 | else { | |
1181 | /* XXX: should we return system default? */ | |
1182 | val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; | |
1183 | } | |
1184 | ||
1185 | if (np->srcprefs & IPV6_PREFER_SRC_COA) | |
1186 | val |= IPV6_PREFER_SRC_COA; | |
1187 | else | |
1188 | val |= IPV6_PREFER_SRC_HOME; | |
1189 | break; | |
e802af9c SH |
1190 | |
1191 | case IPV6_MINHOPCOUNT: | |
1192 | val = np->min_hopcount; | |
1193 | break; | |
793b1473 BH |
1194 | |
1195 | case IPV6_DONTFRAG: | |
1196 | val = np->dontfrag; | |
1197 | break; | |
7cbca67c | 1198 | |
1da177e4 | 1199 | default: |
cf6fc4a9 | 1200 | return -ENOPROTOOPT; |
1da177e4 LT |
1201 | } |
1202 | len = min_t(unsigned int, sizeof(int), len); | |
1203 | if(put_user(len, optlen)) | |
1204 | return -EFAULT; | |
1205 | if(copy_to_user(optval,&val,len)) | |
1206 | return -EFAULT; | |
1207 | return 0; | |
1208 | } | |
1209 | ||
3fdadf7d DM |
1210 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1211 | char __user *optval, int __user *optlen) | |
1212 | { | |
1213 | int err; | |
1214 | ||
1215 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
1216 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
1217 | ||
1218 | if(level != SOL_IPV6) | |
1219 | return -ENOPROTOOPT; | |
1220 | ||
1221 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); | |
1222 | #ifdef CONFIG_NETFILTER | |
cf6fc4a9 WY |
1223 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1224 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1225 | int len; |
1226 | ||
1227 | if (get_user(len, optlen)) | |
1228 | return -EFAULT; | |
1229 | ||
1230 | lock_sock(sk); | |
1231 | err = nf_getsockopt(sk, PF_INET6, optname, optval, | |
1232 | &len); | |
1233 | release_sock(sk); | |
1234 | if (err >= 0) | |
1235 | err = put_user(len, optlen); | |
1236 | } | |
1237 | #endif | |
1238 | return err; | |
1239 | } | |
1240 | ||
7159039a YH |
1241 | EXPORT_SYMBOL(ipv6_getsockopt); |
1242 | ||
3fdadf7d DM |
1243 | #ifdef CONFIG_COMPAT |
1244 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1245 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
1246 | { |
1247 | int err; | |
1248 | ||
1249 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
1250 | if (udp_prot.compat_getsockopt != NULL) |
1251 | return udp_prot.compat_getsockopt(sk, level, optname, | |
1252 | optval, optlen); | |
1253 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
1254 | } |
1255 | ||
543d9cfe | 1256 | if (level != SOL_IPV6) |
3fdadf7d DM |
1257 | return -ENOPROTOOPT; |
1258 | ||
80991790 PE |
1259 | if (optname == MCAST_MSFILTER) |
1260 | return compat_mc_getsockopt(sk, level, optname, optval, optlen, | |
1261 | ipv6_getsockopt); | |
1262 | ||
3fdadf7d DM |
1263 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); |
1264 | #ifdef CONFIG_NETFILTER | |
cf6fc4a9 WY |
1265 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1266 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1267 | int len; |
1268 | ||
1269 | if (get_user(len, optlen)) | |
1270 | return -EFAULT; | |
1271 | ||
1272 | lock_sock(sk); | |
543d9cfe ACM |
1273 | err = compat_nf_getsockopt(sk, PF_INET6, |
1274 | optname, optval, &len); | |
3fdadf7d DM |
1275 | release_sock(sk); |
1276 | if (err >= 0) | |
1277 | err = put_user(len, optlen); | |
1278 | } | |
1279 | #endif | |
1280 | return err; | |
1281 | } | |
543d9cfe ACM |
1282 | |
1283 | EXPORT_SYMBOL(compat_ipv6_getsockopt); | |
3fdadf7d DM |
1284 | #endif |
1285 |