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1da177e4 LT |
1 | /* |
2 | * IPv6 BSD socket options interface | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
6 | * Pedro Roque <roque@di.fc.ul.pt> | |
7 | * | |
8 | * Based on linux/net/ipv4/ip_sockglue.c | |
9 | * | |
10 | * $Id: ipv6_sockglue.c,v 1.41 2002/02/01 22:01:04 davem Exp $ | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License | |
14 | * as published by the Free Software Foundation; either version | |
15 | * 2 of the License, or (at your option) any later version. | |
16 | * | |
17 | * FIXME: Make the setsockopt code POSIX compliant: That is | |
18 | * | |
19 | * o Return -EINVAL for setsockopt of short lengths | |
20 | * o Truncate getsockopt returns | |
21 | * o Return an optlen of the truncated length if need be | |
22 | * | |
23 | * Changes: | |
24 | * David L Stevens <dlstevens@us.ibm.com>: | |
25 | * - added multicast source filtering API for MLDv2 | |
26 | */ | |
27 | ||
28 | #include <linux/module.h> | |
29 | #include <linux/config.h> | |
30 | #include <linux/errno.h> | |
31 | #include <linux/types.h> | |
32 | #include <linux/socket.h> | |
33 | #include <linux/sockios.h> | |
34 | #include <linux/sched.h> | |
35 | #include <linux/net.h> | |
36 | #include <linux/in6.h> | |
37 | #include <linux/netdevice.h> | |
38 | #include <linux/if_arp.h> | |
39 | #include <linux/init.h> | |
40 | #include <linux/sysctl.h> | |
41 | #include <linux/netfilter.h> | |
42 | ||
43 | #include <net/sock.h> | |
44 | #include <net/snmp.h> | |
45 | #include <net/ipv6.h> | |
46 | #include <net/ndisc.h> | |
47 | #include <net/protocol.h> | |
48 | #include <net/transp_v6.h> | |
49 | #include <net/ip6_route.h> | |
50 | #include <net/addrconf.h> | |
51 | #include <net/inet_common.h> | |
52 | #include <net/tcp.h> | |
53 | #include <net/udp.h> | |
54 | #include <net/xfrm.h> | |
55 | ||
56 | #include <asm/uaccess.h> | |
57 | ||
ba89966c | 58 | DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly; |
1da177e4 LT |
59 | |
60 | static struct packet_type ipv6_packet_type = { | |
61 | .type = __constant_htons(ETH_P_IPV6), | |
62 | .func = ipv6_rcv, | |
63 | }; | |
64 | ||
65 | struct ip6_ra_chain *ip6_ra_chain; | |
66 | DEFINE_RWLOCK(ip6_ra_lock); | |
67 | ||
68 | int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *)) | |
69 | { | |
70 | struct ip6_ra_chain *ra, *new_ra, **rap; | |
71 | ||
72 | /* RA packet may be delivered ONLY to IPPROTO_RAW socket */ | |
73 | if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW) | |
74 | return -EINVAL; | |
75 | ||
76 | new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; | |
77 | ||
78 | write_lock_bh(&ip6_ra_lock); | |
79 | for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) { | |
80 | if (ra->sk == sk) { | |
81 | if (sel>=0) { | |
82 | write_unlock_bh(&ip6_ra_lock); | |
a51482bd | 83 | kfree(new_ra); |
1da177e4 LT |
84 | return -EADDRINUSE; |
85 | } | |
86 | ||
87 | *rap = ra->next; | |
88 | write_unlock_bh(&ip6_ra_lock); | |
89 | ||
90 | if (ra->destructor) | |
91 | ra->destructor(sk); | |
92 | sock_put(sk); | |
93 | kfree(ra); | |
94 | return 0; | |
95 | } | |
96 | } | |
97 | if (new_ra == NULL) { | |
98 | write_unlock_bh(&ip6_ra_lock); | |
99 | return -ENOBUFS; | |
100 | } | |
101 | new_ra->sk = sk; | |
102 | new_ra->sel = sel; | |
103 | new_ra->destructor = destructor; | |
104 | new_ra->next = ra; | |
105 | *rap = new_ra; | |
106 | sock_hold(sk); | |
107 | write_unlock_bh(&ip6_ra_lock); | |
108 | return 0; | |
109 | } | |
110 | ||
1da177e4 LT |
111 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
112 | char __user *optval, int optlen) | |
113 | { | |
114 | struct ipv6_pinfo *np = inet6_sk(sk); | |
115 | int val, valbool; | |
116 | int retv = -ENOPROTOOPT; | |
117 | ||
118 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
119 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
120 | ||
121 | if(level!=SOL_IPV6) | |
122 | goto out; | |
123 | ||
124 | if (optval == NULL) | |
125 | val=0; | |
126 | else if (get_user(val, (int __user *) optval)) | |
127 | return -EFAULT; | |
128 | ||
129 | valbool = (val!=0); | |
130 | ||
131 | lock_sock(sk); | |
132 | ||
133 | switch (optname) { | |
134 | ||
135 | case IPV6_ADDRFORM: | |
136 | if (val == PF_INET) { | |
137 | struct ipv6_txoptions *opt; | |
138 | struct sk_buff *pktopt; | |
139 | ||
140 | if (sk->sk_protocol != IPPROTO_UDP && | |
141 | sk->sk_protocol != IPPROTO_TCP) | |
142 | break; | |
143 | ||
144 | if (sk->sk_state != TCP_ESTABLISHED) { | |
145 | retv = -ENOTCONN; | |
146 | break; | |
147 | } | |
148 | ||
149 | if (ipv6_only_sock(sk) || | |
150 | !(ipv6_addr_type(&np->daddr) & IPV6_ADDR_MAPPED)) { | |
151 | retv = -EADDRNOTAVAIL; | |
152 | break; | |
153 | } | |
154 | ||
155 | fl6_free_socklist(sk); | |
156 | ipv6_sock_mc_close(sk); | |
157 | ||
e6848976 ACM |
158 | /* |
159 | * Sock is moving from IPv6 to IPv4 (sk_prot), so | |
160 | * remove it from the refcnt debug socks count in the | |
161 | * original family... | |
162 | */ | |
163 | sk_refcnt_debug_dec(sk); | |
164 | ||
1da177e4 LT |
165 | if (sk->sk_protocol == IPPROTO_TCP) { |
166 | struct tcp_sock *tp = tcp_sk(sk); | |
167 | ||
168 | local_bh_disable(); | |
169 | sock_prot_dec_use(sk->sk_prot); | |
170 | sock_prot_inc_use(&tcp_prot); | |
171 | local_bh_enable(); | |
172 | sk->sk_prot = &tcp_prot; | |
173 | tp->af_specific = &ipv4_specific; | |
174 | sk->sk_socket->ops = &inet_stream_ops; | |
175 | sk->sk_family = PF_INET; | |
176 | tcp_sync_mss(sk, tp->pmtu_cookie); | |
177 | } else { | |
178 | local_bh_disable(); | |
179 | sock_prot_dec_use(sk->sk_prot); | |
180 | sock_prot_inc_use(&udp_prot); | |
181 | local_bh_enable(); | |
182 | sk->sk_prot = &udp_prot; | |
183 | sk->sk_socket->ops = &inet_dgram_ops; | |
184 | sk->sk_family = PF_INET; | |
185 | } | |
186 | opt = xchg(&np->opt, NULL); | |
187 | if (opt) | |
188 | sock_kfree_s(sk, opt, opt->tot_len); | |
189 | pktopt = xchg(&np->pktoptions, NULL); | |
190 | if (pktopt) | |
191 | kfree_skb(pktopt); | |
192 | ||
193 | sk->sk_destruct = inet_sock_destruct; | |
e6848976 ACM |
194 | /* |
195 | * ... and add it to the refcnt debug socks count | |
196 | * in the new family. -acme | |
197 | */ | |
198 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
199 | module_put(THIS_MODULE); |
200 | retv = 0; | |
201 | break; | |
202 | } | |
203 | goto e_inval; | |
204 | ||
205 | case IPV6_V6ONLY: | |
206 | if (inet_sk(sk)->num) | |
207 | goto e_inval; | |
208 | np->ipv6only = valbool; | |
209 | retv = 0; | |
210 | break; | |
211 | ||
333fad53 | 212 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
213 | np->rxopt.bits.rxinfo = valbool; |
214 | retv = 0; | |
215 | break; | |
333fad53 YH |
216 | |
217 | case IPV6_2292PKTINFO: | |
218 | np->rxopt.bits.rxoinfo = valbool; | |
219 | retv = 0; | |
220 | break; | |
1da177e4 | 221 | |
333fad53 | 222 | case IPV6_RECVHOPLIMIT: |
1da177e4 LT |
223 | np->rxopt.bits.rxhlim = valbool; |
224 | retv = 0; | |
225 | break; | |
226 | ||
333fad53 YH |
227 | case IPV6_2292HOPLIMIT: |
228 | np->rxopt.bits.rxohlim = valbool; | |
229 | retv = 0; | |
230 | break; | |
231 | ||
232 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
233 | if (val < 0 || val > 2) |
234 | goto e_inval; | |
235 | np->rxopt.bits.srcrt = val; | |
236 | retv = 0; | |
237 | break; | |
238 | ||
333fad53 YH |
239 | case IPV6_2292RTHDR: |
240 | if (val < 0 || val > 2) | |
241 | goto e_inval; | |
242 | np->rxopt.bits.osrcrt = val; | |
243 | retv = 0; | |
244 | break; | |
245 | ||
246 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
247 | np->rxopt.bits.hopopts = valbool; |
248 | retv = 0; | |
249 | break; | |
250 | ||
333fad53 YH |
251 | case IPV6_2292HOPOPTS: |
252 | np->rxopt.bits.ohopopts = valbool; | |
253 | retv = 0; | |
254 | break; | |
255 | ||
256 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
257 | np->rxopt.bits.dstopts = valbool; |
258 | retv = 0; | |
259 | break; | |
260 | ||
333fad53 YH |
261 | case IPV6_2292DSTOPTS: |
262 | np->rxopt.bits.odstopts = valbool; | |
263 | retv = 0; | |
264 | break; | |
265 | ||
41a1f8ea YH |
266 | case IPV6_TCLASS: |
267 | if (val < 0 || val > 0xff) | |
268 | goto e_inval; | |
269 | np->tclass = val; | |
270 | retv = 0; | |
271 | break; | |
272 | ||
273 | case IPV6_RECVTCLASS: | |
274 | np->rxopt.bits.rxtclass = valbool; | |
275 | retv = 0; | |
276 | break; | |
277 | ||
1da177e4 LT |
278 | case IPV6_FLOWINFO: |
279 | np->rxopt.bits.rxflow = valbool; | |
280 | retv = 0; | |
281 | break; | |
282 | ||
333fad53 YH |
283 | case IPV6_HOPOPTS: |
284 | case IPV6_RTHDRDSTOPTS: | |
285 | case IPV6_RTHDR: | |
286 | case IPV6_DSTOPTS: | |
287 | { | |
288 | struct ipv6_txoptions *opt; | |
289 | if (optlen == 0) | |
290 | optval = 0; | |
291 | ||
292 | /* hop-by-hop / destination options are privileged option */ | |
293 | retv = -EPERM; | |
294 | if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW)) | |
295 | break; | |
296 | ||
297 | retv = -EINVAL; | |
298 | if (optlen & 0x7 || optlen > 8 * 255) | |
299 | break; | |
300 | ||
301 | opt = ipv6_renew_options(sk, np->opt, optname, | |
302 | (struct ipv6_opt_hdr __user *)optval, | |
303 | optlen); | |
304 | if (IS_ERR(opt)) { | |
305 | retv = PTR_ERR(opt); | |
306 | break; | |
307 | } | |
308 | ||
309 | /* routing header option needs extra check */ | |
310 | if (optname == IPV6_RTHDR && opt->srcrt) { | |
311 | struct ipv6_rt_hdr *rthdr = opt->srcrt; | |
312 | if (rthdr->type) | |
313 | goto sticky_done; | |
314 | if ((rthdr->hdrlen & 1) || | |
315 | (rthdr->hdrlen >> 1) != rthdr->segments_left) | |
316 | goto sticky_done; | |
317 | } | |
318 | ||
319 | retv = 0; | |
320 | if (sk->sk_type == SOCK_STREAM) { | |
321 | if (opt) { | |
322 | struct tcp_sock *tp = tcp_sk(sk); | |
323 | if (!((1 << sk->sk_state) & | |
324 | (TCPF_LISTEN | TCPF_CLOSE)) | |
325 | && inet_sk(sk)->daddr != LOOPBACK4_IPV6) { | |
326 | tp->ext_header_len = opt->opt_flen + opt->opt_nflen; | |
327 | tcp_sync_mss(sk, tp->pmtu_cookie); | |
328 | } | |
329 | } | |
330 | opt = xchg(&np->opt, opt); | |
331 | sk_dst_reset(sk); | |
332 | } else { | |
333 | write_lock(&sk->sk_dst_lock); | |
334 | opt = xchg(&np->opt, opt); | |
335 | write_unlock(&sk->sk_dst_lock); | |
336 | sk_dst_reset(sk); | |
337 | } | |
338 | sticky_done: | |
339 | if (opt) | |
340 | sock_kfree_s(sk, opt, opt->tot_len); | |
341 | break; | |
342 | } | |
343 | ||
344 | case IPV6_2292PKTOPTIONS: | |
1da177e4 LT |
345 | { |
346 | struct ipv6_txoptions *opt = NULL; | |
347 | struct msghdr msg; | |
348 | struct flowi fl; | |
349 | int junk; | |
350 | ||
351 | fl.fl6_flowlabel = 0; | |
352 | fl.oif = sk->sk_bound_dev_if; | |
353 | ||
354 | if (optlen == 0) | |
355 | goto update; | |
356 | ||
357 | /* 1K is probably excessive | |
358 | * 1K is surely not enough, 2K per standard header is 16K. | |
359 | */ | |
360 | retv = -EINVAL; | |
361 | if (optlen > 64*1024) | |
362 | break; | |
363 | ||
364 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
365 | retv = -ENOBUFS; | |
366 | if (opt == NULL) | |
367 | break; | |
368 | ||
369 | memset(opt, 0, sizeof(*opt)); | |
370 | opt->tot_len = sizeof(*opt) + optlen; | |
371 | retv = -EFAULT; | |
372 | if (copy_from_user(opt+1, optval, optlen)) | |
373 | goto done; | |
374 | ||
375 | msg.msg_controllen = optlen; | |
376 | msg.msg_control = (void*)(opt+1); | |
377 | ||
41a1f8ea | 378 | retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk); |
1da177e4 LT |
379 | if (retv) |
380 | goto done; | |
381 | update: | |
382 | retv = 0; | |
383 | if (sk->sk_type == SOCK_STREAM) { | |
384 | if (opt) { | |
385 | struct tcp_sock *tp = tcp_sk(sk); | |
386 | if (!((1 << sk->sk_state) & | |
387 | (TCPF_LISTEN | TCPF_CLOSE)) | |
388 | && inet_sk(sk)->daddr != LOOPBACK4_IPV6) { | |
389 | tp->ext_header_len = opt->opt_flen + opt->opt_nflen; | |
390 | tcp_sync_mss(sk, tp->pmtu_cookie); | |
391 | } | |
392 | } | |
393 | opt = xchg(&np->opt, opt); | |
394 | sk_dst_reset(sk); | |
395 | } else { | |
396 | write_lock(&sk->sk_dst_lock); | |
397 | opt = xchg(&np->opt, opt); | |
398 | write_unlock(&sk->sk_dst_lock); | |
399 | sk_dst_reset(sk); | |
400 | } | |
401 | ||
402 | done: | |
403 | if (opt) | |
404 | sock_kfree_s(sk, opt, opt->tot_len); | |
405 | break; | |
406 | } | |
407 | case IPV6_UNICAST_HOPS: | |
408 | if (val > 255 || val < -1) | |
409 | goto e_inval; | |
410 | np->hop_limit = val; | |
411 | retv = 0; | |
412 | break; | |
413 | ||
414 | case IPV6_MULTICAST_HOPS: | |
415 | if (sk->sk_type == SOCK_STREAM) | |
416 | goto e_inval; | |
417 | if (val > 255 || val < -1) | |
418 | goto e_inval; | |
419 | np->mcast_hops = val; | |
420 | retv = 0; | |
421 | break; | |
422 | ||
423 | case IPV6_MULTICAST_LOOP: | |
424 | np->mc_loop = valbool; | |
425 | retv = 0; | |
426 | break; | |
427 | ||
428 | case IPV6_MULTICAST_IF: | |
429 | if (sk->sk_type == SOCK_STREAM) | |
430 | goto e_inval; | |
431 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) | |
432 | goto e_inval; | |
433 | ||
434 | if (__dev_get_by_index(val) == NULL) { | |
435 | retv = -ENODEV; | |
436 | break; | |
437 | } | |
438 | np->mcast_oif = val; | |
439 | retv = 0; | |
440 | break; | |
441 | case IPV6_ADD_MEMBERSHIP: | |
442 | case IPV6_DROP_MEMBERSHIP: | |
443 | { | |
444 | struct ipv6_mreq mreq; | |
445 | ||
446 | retv = -EFAULT; | |
447 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
448 | break; | |
449 | ||
450 | if (optname == IPV6_ADD_MEMBERSHIP) | |
451 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
452 | else | |
453 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
454 | break; | |
455 | } | |
456 | case IPV6_JOIN_ANYCAST: | |
457 | case IPV6_LEAVE_ANYCAST: | |
458 | { | |
459 | struct ipv6_mreq mreq; | |
460 | ||
461 | if (optlen != sizeof(struct ipv6_mreq)) | |
462 | goto e_inval; | |
463 | ||
464 | retv = -EFAULT; | |
465 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
466 | break; | |
467 | ||
468 | if (optname == IPV6_JOIN_ANYCAST) | |
469 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
470 | else | |
471 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
472 | break; | |
473 | } | |
474 | case MCAST_JOIN_GROUP: | |
475 | case MCAST_LEAVE_GROUP: | |
476 | { | |
477 | struct group_req greq; | |
478 | struct sockaddr_in6 *psin6; | |
479 | ||
480 | retv = -EFAULT; | |
481 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
482 | break; | |
483 | if (greq.gr_group.ss_family != AF_INET6) { | |
484 | retv = -EADDRNOTAVAIL; | |
485 | break; | |
486 | } | |
487 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
488 | if (optname == MCAST_JOIN_GROUP) | |
489 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, | |
490 | &psin6->sin6_addr); | |
491 | else | |
492 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, | |
493 | &psin6->sin6_addr); | |
494 | break; | |
495 | } | |
496 | case MCAST_JOIN_SOURCE_GROUP: | |
497 | case MCAST_LEAVE_SOURCE_GROUP: | |
498 | case MCAST_BLOCK_SOURCE: | |
499 | case MCAST_UNBLOCK_SOURCE: | |
500 | { | |
501 | struct group_source_req greqs; | |
502 | int omode, add; | |
503 | ||
504 | if (optlen != sizeof(struct group_source_req)) | |
505 | goto e_inval; | |
506 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
507 | retv = -EFAULT; | |
508 | break; | |
509 | } | |
510 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
511 | greqs.gsr_source.ss_family != AF_INET6) { | |
512 | retv = -EADDRNOTAVAIL; | |
513 | break; | |
514 | } | |
515 | if (optname == MCAST_BLOCK_SOURCE) { | |
516 | omode = MCAST_EXCLUDE; | |
517 | add = 1; | |
518 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
519 | omode = MCAST_EXCLUDE; | |
520 | add = 0; | |
521 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
522 | struct sockaddr_in6 *psin6; | |
523 | ||
524 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
525 | retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, | |
526 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
527 | /* prior join w/ different source is ok */ |
528 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
529 | break; |
530 | omode = MCAST_INCLUDE; | |
531 | add = 1; | |
c9e3e8b6 | 532 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
533 | omode = MCAST_INCLUDE; |
534 | add = 0; | |
535 | } | |
536 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
537 | break; | |
538 | } | |
539 | case MCAST_MSFILTER: | |
540 | { | |
1da177e4 LT |
541 | extern int sysctl_mld_max_msf; |
542 | struct group_filter *gsf; | |
543 | ||
544 | if (optlen < GROUP_FILTER_SIZE(0)) | |
545 | goto e_inval; | |
546 | if (optlen > sysctl_optmem_max) { | |
547 | retv = -ENOBUFS; | |
548 | break; | |
549 | } | |
550 | gsf = (struct group_filter *)kmalloc(optlen,GFP_KERNEL); | |
551 | if (gsf == 0) { | |
552 | retv = -ENOBUFS; | |
553 | break; | |
554 | } | |
555 | retv = -EFAULT; | |
556 | if (copy_from_user(gsf, optval, optlen)) { | |
557 | kfree(gsf); | |
558 | break; | |
559 | } | |
560 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
561 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
562 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
563 | kfree(gsf); | |
564 | retv = -ENOBUFS; | |
565 | break; | |
566 | } | |
567 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
568 | kfree(gsf); | |
569 | retv = -EINVAL; | |
570 | break; | |
571 | } | |
572 | retv = ip6_mc_msfilter(sk, gsf); | |
573 | kfree(gsf); | |
574 | ||
575 | break; | |
576 | } | |
577 | case IPV6_ROUTER_ALERT: | |
578 | retv = ip6_ra_control(sk, val, NULL); | |
579 | break; | |
580 | case IPV6_MTU_DISCOVER: | |
581 | if (val<0 || val>2) | |
582 | goto e_inval; | |
583 | np->pmtudisc = val; | |
584 | retv = 0; | |
585 | break; | |
586 | case IPV6_MTU: | |
587 | if (val && val < IPV6_MIN_MTU) | |
588 | goto e_inval; | |
589 | np->frag_size = val; | |
590 | retv = 0; | |
591 | break; | |
592 | case IPV6_RECVERR: | |
593 | np->recverr = valbool; | |
594 | if (!val) | |
595 | skb_queue_purge(&sk->sk_error_queue); | |
596 | retv = 0; | |
597 | break; | |
598 | case IPV6_FLOWINFO_SEND: | |
599 | np->sndflow = valbool; | |
600 | retv = 0; | |
601 | break; | |
602 | case IPV6_FLOWLABEL_MGR: | |
603 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
604 | break; | |
605 | case IPV6_IPSEC_POLICY: | |
606 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 HX |
607 | retv = -EPERM; |
608 | if (!capable(CAP_NET_ADMIN)) | |
609 | break; | |
1da177e4 LT |
610 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
611 | break; | |
612 | ||
613 | #ifdef CONFIG_NETFILTER | |
614 | default: | |
615 | retv = nf_setsockopt(sk, PF_INET6, optname, optval, | |
616 | optlen); | |
617 | break; | |
618 | #endif | |
619 | ||
620 | } | |
621 | release_sock(sk); | |
622 | ||
623 | out: | |
624 | return retv; | |
625 | ||
626 | e_inval: | |
627 | release_sock(sk); | |
628 | return -EINVAL; | |
629 | } | |
630 | ||
333fad53 YH |
631 | int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_opt_hdr *hdr, |
632 | char __user *optval, int len) | |
633 | { | |
634 | if (!hdr) | |
635 | return 0; | |
636 | len = min_t(int, len, ipv6_optlen(hdr)); | |
637 | if (copy_to_user(optval, hdr, ipv6_optlen(hdr))) | |
638 | return -EFAULT; | |
639 | return len; | |
640 | } | |
641 | ||
1da177e4 LT |
642 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
643 | char __user *optval, int __user *optlen) | |
644 | { | |
645 | struct ipv6_pinfo *np = inet6_sk(sk); | |
646 | int len; | |
647 | int val; | |
648 | ||
649 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
650 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
651 | if(level!=SOL_IPV6) | |
652 | return -ENOPROTOOPT; | |
653 | if (get_user(len, optlen)) | |
654 | return -EFAULT; | |
655 | switch (optname) { | |
656 | case IPV6_ADDRFORM: | |
657 | if (sk->sk_protocol != IPPROTO_UDP && | |
658 | sk->sk_protocol != IPPROTO_TCP) | |
659 | return -EINVAL; | |
660 | if (sk->sk_state != TCP_ESTABLISHED) | |
661 | return -ENOTCONN; | |
662 | val = sk->sk_family; | |
663 | break; | |
664 | case MCAST_MSFILTER: | |
665 | { | |
666 | struct group_filter gsf; | |
667 | int err; | |
668 | ||
669 | if (len < GROUP_FILTER_SIZE(0)) | |
670 | return -EINVAL; | |
671 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
672 | return -EFAULT; | |
673 | lock_sock(sk); | |
674 | err = ip6_mc_msfget(sk, &gsf, | |
675 | (struct group_filter __user *)optval, optlen); | |
676 | release_sock(sk); | |
677 | return err; | |
678 | } | |
679 | ||
333fad53 | 680 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
681 | { |
682 | struct msghdr msg; | |
683 | struct sk_buff *skb; | |
684 | ||
685 | if (sk->sk_type != SOCK_STREAM) | |
686 | return -ENOPROTOOPT; | |
687 | ||
688 | msg.msg_control = optval; | |
689 | msg.msg_controllen = len; | |
690 | msg.msg_flags = 0; | |
691 | ||
692 | lock_sock(sk); | |
693 | skb = np->pktoptions; | |
694 | if (skb) | |
695 | atomic_inc(&skb->users); | |
696 | release_sock(sk); | |
697 | ||
698 | if (skb) { | |
699 | int err = datagram_recv_ctl(sk, &msg, skb); | |
700 | kfree_skb(skb); | |
701 | if (err) | |
702 | return err; | |
703 | } else { | |
704 | if (np->rxopt.bits.rxinfo) { | |
705 | struct in6_pktinfo src_info; | |
706 | src_info.ipi6_ifindex = np->mcast_oif; | |
707 | ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); | |
708 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); | |
709 | } | |
710 | if (np->rxopt.bits.rxhlim) { | |
711 | int hlim = np->mcast_hops; | |
712 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
713 | } | |
333fad53 YH |
714 | if (np->rxopt.bits.rxoinfo) { |
715 | struct in6_pktinfo src_info; | |
716 | src_info.ipi6_ifindex = np->mcast_oif; | |
717 | ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); | |
718 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); | |
719 | } | |
720 | if (np->rxopt.bits.rxohlim) { | |
721 | int hlim = np->mcast_hops; | |
722 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
723 | } | |
1da177e4 LT |
724 | } |
725 | len -= msg.msg_controllen; | |
726 | return put_user(len, optlen); | |
727 | } | |
728 | case IPV6_MTU: | |
729 | { | |
730 | struct dst_entry *dst; | |
731 | val = 0; | |
732 | lock_sock(sk); | |
733 | dst = sk_dst_get(sk); | |
734 | if (dst) { | |
735 | val = dst_mtu(dst); | |
736 | dst_release(dst); | |
737 | } | |
738 | release_sock(sk); | |
739 | if (!val) | |
740 | return -ENOTCONN; | |
741 | break; | |
742 | } | |
743 | ||
744 | case IPV6_V6ONLY: | |
745 | val = np->ipv6only; | |
746 | break; | |
747 | ||
333fad53 | 748 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
749 | val = np->rxopt.bits.rxinfo; |
750 | break; | |
751 | ||
333fad53 YH |
752 | case IPV6_2292PKTINFO: |
753 | val = np->rxopt.bits.rxoinfo; | |
754 | break; | |
755 | ||
756 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
757 | val = np->rxopt.bits.rxhlim; |
758 | break; | |
759 | ||
333fad53 YH |
760 | case IPV6_2292HOPLIMIT: |
761 | val = np->rxopt.bits.rxohlim; | |
762 | break; | |
763 | ||
764 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
765 | val = np->rxopt.bits.srcrt; |
766 | break; | |
767 | ||
333fad53 YH |
768 | case IPV6_2292RTHDR: |
769 | val = np->rxopt.bits.osrcrt; | |
770 | break; | |
771 | ||
1da177e4 | 772 | case IPV6_HOPOPTS: |
333fad53 YH |
773 | case IPV6_RTHDRDSTOPTS: |
774 | case IPV6_RTHDR: | |
775 | case IPV6_DSTOPTS: | |
776 | { | |
777 | ||
778 | lock_sock(sk); | |
779 | len = ipv6_getsockopt_sticky(sk, np->opt->hopopt, | |
780 | optval, len); | |
781 | release_sock(sk); | |
782 | return put_user(len, optlen); | |
783 | } | |
784 | ||
785 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
786 | val = np->rxopt.bits.hopopts; |
787 | break; | |
788 | ||
333fad53 YH |
789 | case IPV6_2292HOPOPTS: |
790 | val = np->rxopt.bits.ohopopts; | |
791 | break; | |
792 | ||
793 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
794 | val = np->rxopt.bits.dstopts; |
795 | break; | |
796 | ||
333fad53 YH |
797 | case IPV6_2292DSTOPTS: |
798 | val = np->rxopt.bits.odstopts; | |
799 | break; | |
800 | ||
41a1f8ea YH |
801 | case IPV6_TCLASS: |
802 | val = np->tclass; | |
803 | break; | |
804 | ||
805 | case IPV6_RECVTCLASS: | |
806 | val = np->rxopt.bits.rxtclass; | |
807 | break; | |
808 | ||
1da177e4 LT |
809 | case IPV6_FLOWINFO: |
810 | val = np->rxopt.bits.rxflow; | |
811 | break; | |
812 | ||
813 | case IPV6_UNICAST_HOPS: | |
814 | val = np->hop_limit; | |
815 | break; | |
816 | ||
817 | case IPV6_MULTICAST_HOPS: | |
818 | val = np->mcast_hops; | |
819 | break; | |
820 | ||
821 | case IPV6_MULTICAST_LOOP: | |
822 | val = np->mc_loop; | |
823 | break; | |
824 | ||
825 | case IPV6_MULTICAST_IF: | |
826 | val = np->mcast_oif; | |
827 | break; | |
828 | ||
829 | case IPV6_MTU_DISCOVER: | |
830 | val = np->pmtudisc; | |
831 | break; | |
832 | ||
833 | case IPV6_RECVERR: | |
834 | val = np->recverr; | |
835 | break; | |
836 | ||
837 | case IPV6_FLOWINFO_SEND: | |
838 | val = np->sndflow; | |
839 | break; | |
840 | ||
841 | default: | |
842 | #ifdef CONFIG_NETFILTER | |
843 | lock_sock(sk); | |
844 | val = nf_getsockopt(sk, PF_INET6, optname, optval, | |
845 | &len); | |
846 | release_sock(sk); | |
847 | if (val >= 0) | |
848 | val = put_user(len, optlen); | |
849 | return val; | |
850 | #else | |
851 | return -EINVAL; | |
852 | #endif | |
853 | } | |
854 | len = min_t(unsigned int, sizeof(int), len); | |
855 | if(put_user(len, optlen)) | |
856 | return -EFAULT; | |
857 | if(copy_to_user(optval,&val,len)) | |
858 | return -EFAULT; | |
859 | return 0; | |
860 | } | |
861 | ||
862 | void __init ipv6_packet_init(void) | |
863 | { | |
864 | dev_add_pack(&ipv6_packet_type); | |
865 | } | |
866 | ||
867 | void ipv6_packet_cleanup(void) | |
868 | { | |
869 | dev_remove_pack(&ipv6_packet_type); | |
870 | } |