Commit | Line | Data |
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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 | ||
58 | DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics); | |
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); | |
83 | if (new_ra) | |
84 | kfree(new_ra); | |
85 | return -EADDRINUSE; | |
86 | } | |
87 | ||
88 | *rap = ra->next; | |
89 | write_unlock_bh(&ip6_ra_lock); | |
90 | ||
91 | if (ra->destructor) | |
92 | ra->destructor(sk); | |
93 | sock_put(sk); | |
94 | kfree(ra); | |
95 | return 0; | |
96 | } | |
97 | } | |
98 | if (new_ra == NULL) { | |
99 | write_unlock_bh(&ip6_ra_lock); | |
100 | return -ENOBUFS; | |
101 | } | |
102 | new_ra->sk = sk; | |
103 | new_ra->sel = sel; | |
104 | new_ra->destructor = destructor; | |
105 | new_ra->next = ra; | |
106 | *rap = new_ra; | |
107 | sock_hold(sk); | |
108 | write_unlock_bh(&ip6_ra_lock); | |
109 | return 0; | |
110 | } | |
111 | ||
112 | extern int ip6_mc_source(int add, int omode, struct sock *sk, | |
113 | struct group_source_req *pgsr); | |
114 | extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf); | |
115 | extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
116 | struct group_filter __user *optval, int __user *optlen); | |
117 | ||
118 | ||
119 | int ipv6_setsockopt(struct sock *sk, int level, int optname, | |
120 | char __user *optval, int optlen) | |
121 | { | |
122 | struct ipv6_pinfo *np = inet6_sk(sk); | |
123 | int val, valbool; | |
124 | int retv = -ENOPROTOOPT; | |
125 | ||
126 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
127 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
128 | ||
129 | if(level!=SOL_IPV6) | |
130 | goto out; | |
131 | ||
132 | if (optval == NULL) | |
133 | val=0; | |
134 | else if (get_user(val, (int __user *) optval)) | |
135 | return -EFAULT; | |
136 | ||
137 | valbool = (val!=0); | |
138 | ||
139 | lock_sock(sk); | |
140 | ||
141 | switch (optname) { | |
142 | ||
143 | case IPV6_ADDRFORM: | |
144 | if (val == PF_INET) { | |
145 | struct ipv6_txoptions *opt; | |
146 | struct sk_buff *pktopt; | |
147 | ||
148 | if (sk->sk_protocol != IPPROTO_UDP && | |
149 | sk->sk_protocol != IPPROTO_TCP) | |
150 | break; | |
151 | ||
152 | if (sk->sk_state != TCP_ESTABLISHED) { | |
153 | retv = -ENOTCONN; | |
154 | break; | |
155 | } | |
156 | ||
157 | if (ipv6_only_sock(sk) || | |
158 | !(ipv6_addr_type(&np->daddr) & IPV6_ADDR_MAPPED)) { | |
159 | retv = -EADDRNOTAVAIL; | |
160 | break; | |
161 | } | |
162 | ||
163 | fl6_free_socklist(sk); | |
164 | ipv6_sock_mc_close(sk); | |
165 | ||
e6848976 ACM |
166 | /* |
167 | * Sock is moving from IPv6 to IPv4 (sk_prot), so | |
168 | * remove it from the refcnt debug socks count in the | |
169 | * original family... | |
170 | */ | |
171 | sk_refcnt_debug_dec(sk); | |
172 | ||
1da177e4 LT |
173 | if (sk->sk_protocol == IPPROTO_TCP) { |
174 | struct tcp_sock *tp = tcp_sk(sk); | |
175 | ||
176 | local_bh_disable(); | |
177 | sock_prot_dec_use(sk->sk_prot); | |
178 | sock_prot_inc_use(&tcp_prot); | |
179 | local_bh_enable(); | |
180 | sk->sk_prot = &tcp_prot; | |
181 | tp->af_specific = &ipv4_specific; | |
182 | sk->sk_socket->ops = &inet_stream_ops; | |
183 | sk->sk_family = PF_INET; | |
184 | tcp_sync_mss(sk, tp->pmtu_cookie); | |
185 | } else { | |
186 | local_bh_disable(); | |
187 | sock_prot_dec_use(sk->sk_prot); | |
188 | sock_prot_inc_use(&udp_prot); | |
189 | local_bh_enable(); | |
190 | sk->sk_prot = &udp_prot; | |
191 | sk->sk_socket->ops = &inet_dgram_ops; | |
192 | sk->sk_family = PF_INET; | |
193 | } | |
194 | opt = xchg(&np->opt, NULL); | |
195 | if (opt) | |
196 | sock_kfree_s(sk, opt, opt->tot_len); | |
197 | pktopt = xchg(&np->pktoptions, NULL); | |
198 | if (pktopt) | |
199 | kfree_skb(pktopt); | |
200 | ||
201 | sk->sk_destruct = inet_sock_destruct; | |
e6848976 ACM |
202 | /* |
203 | * ... and add it to the refcnt debug socks count | |
204 | * in the new family. -acme | |
205 | */ | |
206 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
207 | module_put(THIS_MODULE); |
208 | retv = 0; | |
209 | break; | |
210 | } | |
211 | goto e_inval; | |
212 | ||
213 | case IPV6_V6ONLY: | |
214 | if (inet_sk(sk)->num) | |
215 | goto e_inval; | |
216 | np->ipv6only = valbool; | |
217 | retv = 0; | |
218 | break; | |
219 | ||
220 | case IPV6_PKTINFO: | |
221 | np->rxopt.bits.rxinfo = valbool; | |
222 | retv = 0; | |
223 | break; | |
224 | ||
225 | case IPV6_HOPLIMIT: | |
226 | np->rxopt.bits.rxhlim = valbool; | |
227 | retv = 0; | |
228 | break; | |
229 | ||
230 | case IPV6_RTHDR: | |
231 | if (val < 0 || val > 2) | |
232 | goto e_inval; | |
233 | np->rxopt.bits.srcrt = val; | |
234 | retv = 0; | |
235 | break; | |
236 | ||
237 | case IPV6_HOPOPTS: | |
238 | np->rxopt.bits.hopopts = valbool; | |
239 | retv = 0; | |
240 | break; | |
241 | ||
242 | case IPV6_DSTOPTS: | |
243 | np->rxopt.bits.dstopts = valbool; | |
244 | retv = 0; | |
245 | break; | |
246 | ||
247 | case IPV6_FLOWINFO: | |
248 | np->rxopt.bits.rxflow = valbool; | |
249 | retv = 0; | |
250 | break; | |
251 | ||
252 | case IPV6_PKTOPTIONS: | |
253 | { | |
254 | struct ipv6_txoptions *opt = NULL; | |
255 | struct msghdr msg; | |
256 | struct flowi fl; | |
257 | int junk; | |
258 | ||
259 | fl.fl6_flowlabel = 0; | |
260 | fl.oif = sk->sk_bound_dev_if; | |
261 | ||
262 | if (optlen == 0) | |
263 | goto update; | |
264 | ||
265 | /* 1K is probably excessive | |
266 | * 1K is surely not enough, 2K per standard header is 16K. | |
267 | */ | |
268 | retv = -EINVAL; | |
269 | if (optlen > 64*1024) | |
270 | break; | |
271 | ||
272 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
273 | retv = -ENOBUFS; | |
274 | if (opt == NULL) | |
275 | break; | |
276 | ||
277 | memset(opt, 0, sizeof(*opt)); | |
278 | opt->tot_len = sizeof(*opt) + optlen; | |
279 | retv = -EFAULT; | |
280 | if (copy_from_user(opt+1, optval, optlen)) | |
281 | goto done; | |
282 | ||
283 | msg.msg_controllen = optlen; | |
284 | msg.msg_control = (void*)(opt+1); | |
285 | ||
286 | retv = datagram_send_ctl(&msg, &fl, opt, &junk); | |
287 | if (retv) | |
288 | goto done; | |
289 | update: | |
290 | retv = 0; | |
291 | if (sk->sk_type == SOCK_STREAM) { | |
292 | if (opt) { | |
293 | struct tcp_sock *tp = tcp_sk(sk); | |
294 | if (!((1 << sk->sk_state) & | |
295 | (TCPF_LISTEN | TCPF_CLOSE)) | |
296 | && inet_sk(sk)->daddr != LOOPBACK4_IPV6) { | |
297 | tp->ext_header_len = opt->opt_flen + opt->opt_nflen; | |
298 | tcp_sync_mss(sk, tp->pmtu_cookie); | |
299 | } | |
300 | } | |
301 | opt = xchg(&np->opt, opt); | |
302 | sk_dst_reset(sk); | |
303 | } else { | |
304 | write_lock(&sk->sk_dst_lock); | |
305 | opt = xchg(&np->opt, opt); | |
306 | write_unlock(&sk->sk_dst_lock); | |
307 | sk_dst_reset(sk); | |
308 | } | |
309 | ||
310 | done: | |
311 | if (opt) | |
312 | sock_kfree_s(sk, opt, opt->tot_len); | |
313 | break; | |
314 | } | |
315 | case IPV6_UNICAST_HOPS: | |
316 | if (val > 255 || val < -1) | |
317 | goto e_inval; | |
318 | np->hop_limit = val; | |
319 | retv = 0; | |
320 | break; | |
321 | ||
322 | case IPV6_MULTICAST_HOPS: | |
323 | if (sk->sk_type == SOCK_STREAM) | |
324 | goto e_inval; | |
325 | if (val > 255 || val < -1) | |
326 | goto e_inval; | |
327 | np->mcast_hops = val; | |
328 | retv = 0; | |
329 | break; | |
330 | ||
331 | case IPV6_MULTICAST_LOOP: | |
332 | np->mc_loop = valbool; | |
333 | retv = 0; | |
334 | break; | |
335 | ||
336 | case IPV6_MULTICAST_IF: | |
337 | if (sk->sk_type == SOCK_STREAM) | |
338 | goto e_inval; | |
339 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) | |
340 | goto e_inval; | |
341 | ||
342 | if (__dev_get_by_index(val) == NULL) { | |
343 | retv = -ENODEV; | |
344 | break; | |
345 | } | |
346 | np->mcast_oif = val; | |
347 | retv = 0; | |
348 | break; | |
349 | case IPV6_ADD_MEMBERSHIP: | |
350 | case IPV6_DROP_MEMBERSHIP: | |
351 | { | |
352 | struct ipv6_mreq mreq; | |
353 | ||
354 | retv = -EFAULT; | |
355 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
356 | break; | |
357 | ||
358 | if (optname == IPV6_ADD_MEMBERSHIP) | |
359 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
360 | else | |
361 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
362 | break; | |
363 | } | |
364 | case IPV6_JOIN_ANYCAST: | |
365 | case IPV6_LEAVE_ANYCAST: | |
366 | { | |
367 | struct ipv6_mreq mreq; | |
368 | ||
369 | if (optlen != sizeof(struct ipv6_mreq)) | |
370 | goto e_inval; | |
371 | ||
372 | retv = -EFAULT; | |
373 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
374 | break; | |
375 | ||
376 | if (optname == IPV6_JOIN_ANYCAST) | |
377 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
378 | else | |
379 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
380 | break; | |
381 | } | |
382 | case MCAST_JOIN_GROUP: | |
383 | case MCAST_LEAVE_GROUP: | |
384 | { | |
385 | struct group_req greq; | |
386 | struct sockaddr_in6 *psin6; | |
387 | ||
388 | retv = -EFAULT; | |
389 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
390 | break; | |
391 | if (greq.gr_group.ss_family != AF_INET6) { | |
392 | retv = -EADDRNOTAVAIL; | |
393 | break; | |
394 | } | |
395 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
396 | if (optname == MCAST_JOIN_GROUP) | |
397 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, | |
398 | &psin6->sin6_addr); | |
399 | else | |
400 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, | |
401 | &psin6->sin6_addr); | |
402 | break; | |
403 | } | |
404 | case MCAST_JOIN_SOURCE_GROUP: | |
405 | case MCAST_LEAVE_SOURCE_GROUP: | |
406 | case MCAST_BLOCK_SOURCE: | |
407 | case MCAST_UNBLOCK_SOURCE: | |
408 | { | |
409 | struct group_source_req greqs; | |
410 | int omode, add; | |
411 | ||
412 | if (optlen != sizeof(struct group_source_req)) | |
413 | goto e_inval; | |
414 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
415 | retv = -EFAULT; | |
416 | break; | |
417 | } | |
418 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
419 | greqs.gsr_source.ss_family != AF_INET6) { | |
420 | retv = -EADDRNOTAVAIL; | |
421 | break; | |
422 | } | |
423 | if (optname == MCAST_BLOCK_SOURCE) { | |
424 | omode = MCAST_EXCLUDE; | |
425 | add = 1; | |
426 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
427 | omode = MCAST_EXCLUDE; | |
428 | add = 0; | |
429 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
430 | struct sockaddr_in6 *psin6; | |
431 | ||
432 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
433 | retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, | |
434 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
435 | /* prior join w/ different source is ok */ |
436 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
437 | break; |
438 | omode = MCAST_INCLUDE; | |
439 | add = 1; | |
c9e3e8b6 | 440 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
441 | omode = MCAST_INCLUDE; |
442 | add = 0; | |
443 | } | |
444 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
445 | break; | |
446 | } | |
447 | case MCAST_MSFILTER: | |
448 | { | |
449 | extern int sysctl_optmem_max; | |
450 | extern int sysctl_mld_max_msf; | |
451 | struct group_filter *gsf; | |
452 | ||
453 | if (optlen < GROUP_FILTER_SIZE(0)) | |
454 | goto e_inval; | |
455 | if (optlen > sysctl_optmem_max) { | |
456 | retv = -ENOBUFS; | |
457 | break; | |
458 | } | |
459 | gsf = (struct group_filter *)kmalloc(optlen,GFP_KERNEL); | |
460 | if (gsf == 0) { | |
461 | retv = -ENOBUFS; | |
462 | break; | |
463 | } | |
464 | retv = -EFAULT; | |
465 | if (copy_from_user(gsf, optval, optlen)) { | |
466 | kfree(gsf); | |
467 | break; | |
468 | } | |
469 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
470 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
471 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
472 | kfree(gsf); | |
473 | retv = -ENOBUFS; | |
474 | break; | |
475 | } | |
476 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
477 | kfree(gsf); | |
478 | retv = -EINVAL; | |
479 | break; | |
480 | } | |
481 | retv = ip6_mc_msfilter(sk, gsf); | |
482 | kfree(gsf); | |
483 | ||
484 | break; | |
485 | } | |
486 | case IPV6_ROUTER_ALERT: | |
487 | retv = ip6_ra_control(sk, val, NULL); | |
488 | break; | |
489 | case IPV6_MTU_DISCOVER: | |
490 | if (val<0 || val>2) | |
491 | goto e_inval; | |
492 | np->pmtudisc = val; | |
493 | retv = 0; | |
494 | break; | |
495 | case IPV6_MTU: | |
496 | if (val && val < IPV6_MIN_MTU) | |
497 | goto e_inval; | |
498 | np->frag_size = val; | |
499 | retv = 0; | |
500 | break; | |
501 | case IPV6_RECVERR: | |
502 | np->recverr = valbool; | |
503 | if (!val) | |
504 | skb_queue_purge(&sk->sk_error_queue); | |
505 | retv = 0; | |
506 | break; | |
507 | case IPV6_FLOWINFO_SEND: | |
508 | np->sndflow = valbool; | |
509 | retv = 0; | |
510 | break; | |
511 | case IPV6_FLOWLABEL_MGR: | |
512 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
513 | break; | |
514 | case IPV6_IPSEC_POLICY: | |
515 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 HX |
516 | retv = -EPERM; |
517 | if (!capable(CAP_NET_ADMIN)) | |
518 | break; | |
1da177e4 LT |
519 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
520 | break; | |
521 | ||
522 | #ifdef CONFIG_NETFILTER | |
523 | default: | |
524 | retv = nf_setsockopt(sk, PF_INET6, optname, optval, | |
525 | optlen); | |
526 | break; | |
527 | #endif | |
528 | ||
529 | } | |
530 | release_sock(sk); | |
531 | ||
532 | out: | |
533 | return retv; | |
534 | ||
535 | e_inval: | |
536 | release_sock(sk); | |
537 | return -EINVAL; | |
538 | } | |
539 | ||
540 | int ipv6_getsockopt(struct sock *sk, int level, int optname, | |
541 | char __user *optval, int __user *optlen) | |
542 | { | |
543 | struct ipv6_pinfo *np = inet6_sk(sk); | |
544 | int len; | |
545 | int val; | |
546 | ||
547 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
548 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
549 | if(level!=SOL_IPV6) | |
550 | return -ENOPROTOOPT; | |
551 | if (get_user(len, optlen)) | |
552 | return -EFAULT; | |
553 | switch (optname) { | |
554 | case IPV6_ADDRFORM: | |
555 | if (sk->sk_protocol != IPPROTO_UDP && | |
556 | sk->sk_protocol != IPPROTO_TCP) | |
557 | return -EINVAL; | |
558 | if (sk->sk_state != TCP_ESTABLISHED) | |
559 | return -ENOTCONN; | |
560 | val = sk->sk_family; | |
561 | break; | |
562 | case MCAST_MSFILTER: | |
563 | { | |
564 | struct group_filter gsf; | |
565 | int err; | |
566 | ||
567 | if (len < GROUP_FILTER_SIZE(0)) | |
568 | return -EINVAL; | |
569 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
570 | return -EFAULT; | |
571 | lock_sock(sk); | |
572 | err = ip6_mc_msfget(sk, &gsf, | |
573 | (struct group_filter __user *)optval, optlen); | |
574 | release_sock(sk); | |
575 | return err; | |
576 | } | |
577 | ||
578 | case IPV6_PKTOPTIONS: | |
579 | { | |
580 | struct msghdr msg; | |
581 | struct sk_buff *skb; | |
582 | ||
583 | if (sk->sk_type != SOCK_STREAM) | |
584 | return -ENOPROTOOPT; | |
585 | ||
586 | msg.msg_control = optval; | |
587 | msg.msg_controllen = len; | |
588 | msg.msg_flags = 0; | |
589 | ||
590 | lock_sock(sk); | |
591 | skb = np->pktoptions; | |
592 | if (skb) | |
593 | atomic_inc(&skb->users); | |
594 | release_sock(sk); | |
595 | ||
596 | if (skb) { | |
597 | int err = datagram_recv_ctl(sk, &msg, skb); | |
598 | kfree_skb(skb); | |
599 | if (err) | |
600 | return err; | |
601 | } else { | |
602 | if (np->rxopt.bits.rxinfo) { | |
603 | struct in6_pktinfo src_info; | |
604 | src_info.ipi6_ifindex = np->mcast_oif; | |
605 | ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); | |
606 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); | |
607 | } | |
608 | if (np->rxopt.bits.rxhlim) { | |
609 | int hlim = np->mcast_hops; | |
610 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
611 | } | |
612 | } | |
613 | len -= msg.msg_controllen; | |
614 | return put_user(len, optlen); | |
615 | } | |
616 | case IPV6_MTU: | |
617 | { | |
618 | struct dst_entry *dst; | |
619 | val = 0; | |
620 | lock_sock(sk); | |
621 | dst = sk_dst_get(sk); | |
622 | if (dst) { | |
623 | val = dst_mtu(dst); | |
624 | dst_release(dst); | |
625 | } | |
626 | release_sock(sk); | |
627 | if (!val) | |
628 | return -ENOTCONN; | |
629 | break; | |
630 | } | |
631 | ||
632 | case IPV6_V6ONLY: | |
633 | val = np->ipv6only; | |
634 | break; | |
635 | ||
636 | case IPV6_PKTINFO: | |
637 | val = np->rxopt.bits.rxinfo; | |
638 | break; | |
639 | ||
640 | case IPV6_HOPLIMIT: | |
641 | val = np->rxopt.bits.rxhlim; | |
642 | break; | |
643 | ||
644 | case IPV6_RTHDR: | |
645 | val = np->rxopt.bits.srcrt; | |
646 | break; | |
647 | ||
648 | case IPV6_HOPOPTS: | |
649 | val = np->rxopt.bits.hopopts; | |
650 | break; | |
651 | ||
652 | case IPV6_DSTOPTS: | |
653 | val = np->rxopt.bits.dstopts; | |
654 | break; | |
655 | ||
656 | case IPV6_FLOWINFO: | |
657 | val = np->rxopt.bits.rxflow; | |
658 | break; | |
659 | ||
660 | case IPV6_UNICAST_HOPS: | |
661 | val = np->hop_limit; | |
662 | break; | |
663 | ||
664 | case IPV6_MULTICAST_HOPS: | |
665 | val = np->mcast_hops; | |
666 | break; | |
667 | ||
668 | case IPV6_MULTICAST_LOOP: | |
669 | val = np->mc_loop; | |
670 | break; | |
671 | ||
672 | case IPV6_MULTICAST_IF: | |
673 | val = np->mcast_oif; | |
674 | break; | |
675 | ||
676 | case IPV6_MTU_DISCOVER: | |
677 | val = np->pmtudisc; | |
678 | break; | |
679 | ||
680 | case IPV6_RECVERR: | |
681 | val = np->recverr; | |
682 | break; | |
683 | ||
684 | case IPV6_FLOWINFO_SEND: | |
685 | val = np->sndflow; | |
686 | break; | |
687 | ||
688 | default: | |
689 | #ifdef CONFIG_NETFILTER | |
690 | lock_sock(sk); | |
691 | val = nf_getsockopt(sk, PF_INET6, optname, optval, | |
692 | &len); | |
693 | release_sock(sk); | |
694 | if (val >= 0) | |
695 | val = put_user(len, optlen); | |
696 | return val; | |
697 | #else | |
698 | return -EINVAL; | |
699 | #endif | |
700 | } | |
701 | len = min_t(unsigned int, sizeof(int), len); | |
702 | if(put_user(len, optlen)) | |
703 | return -EFAULT; | |
704 | if(copy_to_user(optval,&val,len)) | |
705 | return -EFAULT; | |
706 | return 0; | |
707 | } | |
708 | ||
709 | void __init ipv6_packet_init(void) | |
710 | { | |
711 | dev_add_pack(&ipv6_packet_type); | |
712 | } | |
713 | ||
714 | void ipv6_packet_cleanup(void) | |
715 | { | |
716 | dev_remove_pack(&ipv6_packet_type); | |
717 | } |