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 | * | |
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> | |
4fc268d2 | 29 | #include <linux/capability.h> |
1da177e4 LT |
30 | #include <linux/errno.h> |
31 | #include <linux/types.h> | |
32 | #include <linux/socket.h> | |
33 | #include <linux/sockios.h> | |
1da177e4 LT |
34 | #include <linux/net.h> |
35 | #include <linux/in6.h> | |
36 | #include <linux/netdevice.h> | |
37 | #include <linux/if_arp.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/sysctl.h> | |
40 | #include <linux/netfilter.h> | |
41 | ||
42 | #include <net/sock.h> | |
43 | #include <net/snmp.h> | |
44 | #include <net/ipv6.h> | |
45 | #include <net/ndisc.h> | |
46 | #include <net/protocol.h> | |
47 | #include <net/transp_v6.h> | |
48 | #include <net/ip6_route.h> | |
49 | #include <net/addrconf.h> | |
50 | #include <net/inet_common.h> | |
51 | #include <net/tcp.h> | |
52 | #include <net/udp.h> | |
ba4e58ec | 53 | #include <net/udplite.h> |
1da177e4 LT |
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 | 59 | |
a430a43d HX |
60 | static struct inet6_protocol *ipv6_gso_pull_exthdrs(struct sk_buff *skb, |
61 | int proto) | |
adcfc7d0 | 62 | { |
a430a43d | 63 | struct inet6_protocol *ops = NULL; |
bbcf467d | 64 | |
adcfc7d0 HX |
65 | for (;;) { |
66 | struct ipv6_opt_hdr *opth; | |
67 | int len; | |
68 | ||
69 | if (proto != NEXTHDR_HOP) { | |
70 | ops = rcu_dereference(inet6_protos[proto]); | |
71 | ||
72 | if (unlikely(!ops)) | |
a430a43d | 73 | break; |
adcfc7d0 HX |
74 | |
75 | if (!(ops->flags & INET6_PROTO_GSO_EXTHDR)) | |
76 | break; | |
77 | } | |
78 | ||
79 | if (unlikely(!pskb_may_pull(skb, 8))) | |
a430a43d | 80 | break; |
adcfc7d0 HX |
81 | |
82 | opth = (void *)skb->data; | |
83 | len = opth->hdrlen * 8 + 8; | |
84 | ||
85 | if (unlikely(!pskb_may_pull(skb, len))) | |
a430a43d | 86 | break; |
adcfc7d0 HX |
87 | |
88 | proto = opth->nexthdr; | |
89 | __skb_pull(skb, len); | |
90 | } | |
91 | ||
a430a43d HX |
92 | return ops; |
93 | } | |
94 | ||
95 | static int ipv6_gso_send_check(struct sk_buff *skb) | |
96 | { | |
97 | struct ipv6hdr *ipv6h; | |
98 | struct inet6_protocol *ops; | |
99 | int err = -EINVAL; | |
100 | ||
101 | if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) | |
102 | goto out; | |
103 | ||
0660e03f | 104 | ipv6h = ipv6_hdr(skb); |
a430a43d HX |
105 | __skb_pull(skb, sizeof(*ipv6h)); |
106 | err = -EPROTONOSUPPORT; | |
107 | ||
108 | rcu_read_lock(); | |
109 | ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr); | |
110 | if (likely(ops && ops->gso_send_check)) { | |
badff6d0 | 111 | skb_reset_transport_header(skb); |
a430a43d HX |
112 | err = ops->gso_send_check(skb); |
113 | } | |
114 | rcu_read_unlock(); | |
115 | ||
116 | out: | |
117 | return err; | |
118 | } | |
adcfc7d0 | 119 | |
a430a43d HX |
120 | static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features) |
121 | { | |
122 | struct sk_buff *segs = ERR_PTR(-EINVAL); | |
123 | struct ipv6hdr *ipv6h; | |
124 | struct inet6_protocol *ops; | |
125 | ||
d212f87b | 126 | if (!(features & NETIF_F_V6_CSUM)) |
1a9e9ef6 HX |
127 | features &= ~NETIF_F_SG; |
128 | ||
a430a43d HX |
129 | if (unlikely(skb_shinfo(skb)->gso_type & |
130 | ~(SKB_GSO_UDP | | |
131 | SKB_GSO_DODGY | | |
132 | SKB_GSO_TCP_ECN | | |
133 | SKB_GSO_TCPV6 | | |
134 | 0))) | |
135 | goto out; | |
136 | ||
137 | if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) | |
138 | goto out; | |
139 | ||
0660e03f | 140 | ipv6h = ipv6_hdr(skb); |
a430a43d HX |
141 | __skb_pull(skb, sizeof(*ipv6h)); |
142 | segs = ERR_PTR(-EPROTONOSUPPORT); | |
143 | ||
144 | rcu_read_lock(); | |
145 | ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr); | |
146 | if (likely(ops && ops->gso_segment)) { | |
badff6d0 | 147 | skb_reset_transport_header(skb); |
a430a43d HX |
148 | segs = ops->gso_segment(skb, features); |
149 | } | |
adcfc7d0 HX |
150 | rcu_read_unlock(); |
151 | ||
152 | if (unlikely(IS_ERR(segs))) | |
153 | goto out; | |
154 | ||
155 | for (skb = segs; skb; skb = skb->next) { | |
0660e03f | 156 | ipv6h = ipv6_hdr(skb); |
6703931c MC |
157 | ipv6h->payload_len = htons(skb->len - skb->mac_len - |
158 | sizeof(*ipv6h)); | |
adcfc7d0 HX |
159 | } |
160 | ||
161 | out: | |
162 | return segs; | |
163 | } | |
164 | ||
1da177e4 | 165 | static struct packet_type ipv6_packet_type = { |
1ab1457c | 166 | .type = __constant_htons(ETH_P_IPV6), |
1da177e4 | 167 | .func = ipv6_rcv, |
a430a43d | 168 | .gso_send_check = ipv6_gso_send_check, |
adcfc7d0 | 169 | .gso_segment = ipv6_gso_segment, |
1da177e4 LT |
170 | }; |
171 | ||
172 | struct ip6_ra_chain *ip6_ra_chain; | |
173 | DEFINE_RWLOCK(ip6_ra_lock); | |
174 | ||
175 | int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *)) | |
176 | { | |
177 | struct ip6_ra_chain *ra, *new_ra, **rap; | |
178 | ||
179 | /* RA packet may be delivered ONLY to IPPROTO_RAW socket */ | |
180 | if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW) | |
181 | return -EINVAL; | |
182 | ||
183 | new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; | |
184 | ||
185 | write_lock_bh(&ip6_ra_lock); | |
186 | for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) { | |
187 | if (ra->sk == sk) { | |
188 | if (sel>=0) { | |
189 | write_unlock_bh(&ip6_ra_lock); | |
a51482bd | 190 | kfree(new_ra); |
1da177e4 LT |
191 | return -EADDRINUSE; |
192 | } | |
193 | ||
194 | *rap = ra->next; | |
195 | write_unlock_bh(&ip6_ra_lock); | |
196 | ||
197 | if (ra->destructor) | |
198 | ra->destructor(sk); | |
199 | sock_put(sk); | |
200 | kfree(ra); | |
201 | return 0; | |
202 | } | |
203 | } | |
204 | if (new_ra == NULL) { | |
205 | write_unlock_bh(&ip6_ra_lock); | |
206 | return -ENOBUFS; | |
207 | } | |
208 | new_ra->sk = sk; | |
209 | new_ra->sel = sel; | |
210 | new_ra->destructor = destructor; | |
211 | new_ra->next = ra; | |
212 | *rap = new_ra; | |
213 | sock_hold(sk); | |
214 | write_unlock_bh(&ip6_ra_lock); | |
215 | return 0; | |
216 | } | |
217 | ||
3fdadf7d | 218 | static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
219 | char __user *optval, int optlen) |
220 | { | |
221 | struct ipv6_pinfo *np = inet6_sk(sk); | |
222 | int val, valbool; | |
223 | int retv = -ENOPROTOOPT; | |
224 | ||
1da177e4 LT |
225 | if (optval == NULL) |
226 | val=0; | |
227 | else if (get_user(val, (int __user *) optval)) | |
228 | return -EFAULT; | |
229 | ||
230 | valbool = (val!=0); | |
231 | ||
232 | lock_sock(sk); | |
233 | ||
234 | switch (optname) { | |
235 | ||
236 | case IPV6_ADDRFORM: | |
237 | if (val == PF_INET) { | |
238 | struct ipv6_txoptions *opt; | |
239 | struct sk_buff *pktopt; | |
240 | ||
241 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 242 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 LT |
243 | sk->sk_protocol != IPPROTO_TCP) |
244 | break; | |
245 | ||
246 | if (sk->sk_state != TCP_ESTABLISHED) { | |
247 | retv = -ENOTCONN; | |
248 | break; | |
249 | } | |
250 | ||
251 | if (ipv6_only_sock(sk) || | |
252 | !(ipv6_addr_type(&np->daddr) & IPV6_ADDR_MAPPED)) { | |
253 | retv = -EADDRNOTAVAIL; | |
254 | break; | |
255 | } | |
256 | ||
257 | fl6_free_socklist(sk); | |
258 | ipv6_sock_mc_close(sk); | |
259 | ||
e6848976 ACM |
260 | /* |
261 | * Sock is moving from IPv6 to IPv4 (sk_prot), so | |
262 | * remove it from the refcnt debug socks count in the | |
263 | * original family... | |
264 | */ | |
265 | sk_refcnt_debug_dec(sk); | |
266 | ||
1da177e4 | 267 | if (sk->sk_protocol == IPPROTO_TCP) { |
d83d8461 | 268 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 LT |
269 | |
270 | local_bh_disable(); | |
271 | sock_prot_dec_use(sk->sk_prot); | |
272 | sock_prot_inc_use(&tcp_prot); | |
273 | local_bh_enable(); | |
274 | sk->sk_prot = &tcp_prot; | |
d83d8461 | 275 | icsk->icsk_af_ops = &ipv4_specific; |
1da177e4 LT |
276 | sk->sk_socket->ops = &inet_stream_ops; |
277 | sk->sk_family = PF_INET; | |
d83d8461 | 278 | tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); |
1da177e4 | 279 | } else { |
ba4e58ec GR |
280 | struct proto *prot = &udp_prot; |
281 | ||
282 | if (sk->sk_protocol == IPPROTO_UDPLITE) | |
283 | prot = &udplite_prot; | |
1da177e4 LT |
284 | local_bh_disable(); |
285 | sock_prot_dec_use(sk->sk_prot); | |
ba4e58ec | 286 | sock_prot_inc_use(prot); |
1da177e4 | 287 | local_bh_enable(); |
ba4e58ec | 288 | sk->sk_prot = prot; |
1da177e4 LT |
289 | sk->sk_socket->ops = &inet_dgram_ops; |
290 | sk->sk_family = PF_INET; | |
291 | } | |
292 | opt = xchg(&np->opt, NULL); | |
293 | if (opt) | |
294 | sock_kfree_s(sk, opt, opt->tot_len); | |
295 | pktopt = xchg(&np->pktoptions, NULL); | |
296 | if (pktopt) | |
297 | kfree_skb(pktopt); | |
298 | ||
299 | sk->sk_destruct = inet_sock_destruct; | |
e6848976 ACM |
300 | /* |
301 | * ... and add it to the refcnt debug socks count | |
302 | * in the new family. -acme | |
303 | */ | |
304 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
305 | module_put(THIS_MODULE); |
306 | retv = 0; | |
307 | break; | |
308 | } | |
309 | goto e_inval; | |
310 | ||
311 | case IPV6_V6ONLY: | |
312 | if (inet_sk(sk)->num) | |
313 | goto e_inval; | |
314 | np->ipv6only = valbool; | |
315 | retv = 0; | |
316 | break; | |
317 | ||
333fad53 | 318 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
319 | np->rxopt.bits.rxinfo = valbool; |
320 | retv = 0; | |
321 | break; | |
1ab1457c | 322 | |
333fad53 YH |
323 | case IPV6_2292PKTINFO: |
324 | np->rxopt.bits.rxoinfo = valbool; | |
325 | retv = 0; | |
326 | break; | |
1da177e4 | 327 | |
333fad53 | 328 | case IPV6_RECVHOPLIMIT: |
1da177e4 LT |
329 | np->rxopt.bits.rxhlim = valbool; |
330 | retv = 0; | |
331 | break; | |
332 | ||
333fad53 YH |
333 | case IPV6_2292HOPLIMIT: |
334 | np->rxopt.bits.rxohlim = valbool; | |
335 | retv = 0; | |
336 | break; | |
337 | ||
338 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
339 | if (val < 0 || val > 2) |
340 | goto e_inval; | |
341 | np->rxopt.bits.srcrt = val; | |
342 | retv = 0; | |
343 | break; | |
344 | ||
333fad53 YH |
345 | case IPV6_2292RTHDR: |
346 | if (val < 0 || val > 2) | |
347 | goto e_inval; | |
348 | np->rxopt.bits.osrcrt = val; | |
349 | retv = 0; | |
350 | break; | |
351 | ||
352 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
353 | np->rxopt.bits.hopopts = valbool; |
354 | retv = 0; | |
355 | break; | |
356 | ||
333fad53 YH |
357 | case IPV6_2292HOPOPTS: |
358 | np->rxopt.bits.ohopopts = valbool; | |
359 | retv = 0; | |
360 | break; | |
361 | ||
362 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
363 | np->rxopt.bits.dstopts = valbool; |
364 | retv = 0; | |
365 | break; | |
366 | ||
333fad53 YH |
367 | case IPV6_2292DSTOPTS: |
368 | np->rxopt.bits.odstopts = valbool; | |
369 | retv = 0; | |
370 | break; | |
371 | ||
41a1f8ea | 372 | case IPV6_TCLASS: |
d0ee011f | 373 | if (val < -1 || val > 0xff) |
41a1f8ea YH |
374 | goto e_inval; |
375 | np->tclass = val; | |
376 | retv = 0; | |
377 | break; | |
1ab1457c | 378 | |
41a1f8ea YH |
379 | case IPV6_RECVTCLASS: |
380 | np->rxopt.bits.rxtclass = valbool; | |
381 | retv = 0; | |
382 | break; | |
383 | ||
1da177e4 LT |
384 | case IPV6_FLOWINFO: |
385 | np->rxopt.bits.rxflow = valbool; | |
386 | retv = 0; | |
387 | break; | |
388 | ||
333fad53 YH |
389 | case IPV6_HOPOPTS: |
390 | case IPV6_RTHDRDSTOPTS: | |
391 | case IPV6_RTHDR: | |
392 | case IPV6_DSTOPTS: | |
393 | { | |
394 | struct ipv6_txoptions *opt; | |
395 | if (optlen == 0) | |
cb422c46 | 396 | optval = NULL; |
333fad53 YH |
397 | |
398 | /* hop-by-hop / destination options are privileged option */ | |
399 | retv = -EPERM; | |
400 | if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW)) | |
401 | break; | |
402 | ||
403 | retv = -EINVAL; | |
404 | if (optlen & 0x7 || optlen > 8 * 255) | |
405 | break; | |
406 | ||
407 | opt = ipv6_renew_options(sk, np->opt, optname, | |
408 | (struct ipv6_opt_hdr __user *)optval, | |
409 | optlen); | |
410 | if (IS_ERR(opt)) { | |
411 | retv = PTR_ERR(opt); | |
412 | break; | |
413 | } | |
414 | ||
415 | /* routing header option needs extra check */ | |
dfee0a72 | 416 | if (optname == IPV6_RTHDR && opt && opt->srcrt) { |
333fad53 | 417 | struct ipv6_rt_hdr *rthdr = opt->srcrt; |
280a9d34 MN |
418 | switch (rthdr->type) { |
419 | case IPV6_SRCRT_TYPE_0: | |
59fbb3a6 | 420 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
280a9d34 MN |
421 | case IPV6_SRCRT_TYPE_2: |
422 | #endif | |
423 | break; | |
424 | default: | |
333fad53 | 425 | goto sticky_done; |
280a9d34 MN |
426 | } |
427 | ||
333fad53 YH |
428 | if ((rthdr->hdrlen & 1) || |
429 | (rthdr->hdrlen >> 1) != rthdr->segments_left) | |
430 | goto sticky_done; | |
431 | } | |
432 | ||
433 | retv = 0; | |
d83d8461 | 434 | if (inet_sk(sk)->is_icsk) { |
333fad53 | 435 | if (opt) { |
d83d8461 | 436 | struct inet_connection_sock *icsk = inet_csk(sk); |
333fad53 YH |
437 | if (!((1 << sk->sk_state) & |
438 | (TCPF_LISTEN | TCPF_CLOSE)) | |
439 | && inet_sk(sk)->daddr != LOOPBACK4_IPV6) { | |
d83d8461 ACM |
440 | icsk->icsk_ext_hdr_len = |
441 | opt->opt_flen + opt->opt_nflen; | |
442 | icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); | |
333fad53 YH |
443 | } |
444 | } | |
445 | opt = xchg(&np->opt, opt); | |
446 | sk_dst_reset(sk); | |
447 | } else { | |
448 | write_lock(&sk->sk_dst_lock); | |
449 | opt = xchg(&np->opt, opt); | |
450 | write_unlock(&sk->sk_dst_lock); | |
451 | sk_dst_reset(sk); | |
452 | } | |
453 | sticky_done: | |
454 | if (opt) | |
455 | sock_kfree_s(sk, opt, opt->tot_len); | |
456 | break; | |
457 | } | |
458 | ||
459 | case IPV6_2292PKTOPTIONS: | |
1da177e4 LT |
460 | { |
461 | struct ipv6_txoptions *opt = NULL; | |
462 | struct msghdr msg; | |
463 | struct flowi fl; | |
464 | int junk; | |
465 | ||
466 | fl.fl6_flowlabel = 0; | |
467 | fl.oif = sk->sk_bound_dev_if; | |
468 | ||
469 | if (optlen == 0) | |
470 | goto update; | |
471 | ||
472 | /* 1K is probably excessive | |
473 | * 1K is surely not enough, 2K per standard header is 16K. | |
474 | */ | |
475 | retv = -EINVAL; | |
476 | if (optlen > 64*1024) | |
477 | break; | |
478 | ||
479 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
480 | retv = -ENOBUFS; | |
481 | if (opt == NULL) | |
482 | break; | |
483 | ||
484 | memset(opt, 0, sizeof(*opt)); | |
485 | opt->tot_len = sizeof(*opt) + optlen; | |
486 | retv = -EFAULT; | |
487 | if (copy_from_user(opt+1, optval, optlen)) | |
488 | goto done; | |
489 | ||
490 | msg.msg_controllen = optlen; | |
491 | msg.msg_control = (void*)(opt+1); | |
492 | ||
41a1f8ea | 493 | retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk); |
1da177e4 LT |
494 | if (retv) |
495 | goto done; | |
496 | update: | |
497 | retv = 0; | |
d83d8461 | 498 | if (inet_sk(sk)->is_icsk) { |
1da177e4 | 499 | if (opt) { |
d83d8461 | 500 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 LT |
501 | if (!((1 << sk->sk_state) & |
502 | (TCPF_LISTEN | TCPF_CLOSE)) | |
503 | && inet_sk(sk)->daddr != LOOPBACK4_IPV6) { | |
d83d8461 ACM |
504 | icsk->icsk_ext_hdr_len = |
505 | opt->opt_flen + opt->opt_nflen; | |
506 | icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); | |
1da177e4 LT |
507 | } |
508 | } | |
509 | opt = xchg(&np->opt, opt); | |
510 | sk_dst_reset(sk); | |
511 | } else { | |
512 | write_lock(&sk->sk_dst_lock); | |
513 | opt = xchg(&np->opt, opt); | |
514 | write_unlock(&sk->sk_dst_lock); | |
515 | sk_dst_reset(sk); | |
516 | } | |
517 | ||
518 | done: | |
519 | if (opt) | |
520 | sock_kfree_s(sk, opt, opt->tot_len); | |
521 | break; | |
522 | } | |
523 | case IPV6_UNICAST_HOPS: | |
524 | if (val > 255 || val < -1) | |
525 | goto e_inval; | |
526 | np->hop_limit = val; | |
527 | retv = 0; | |
528 | break; | |
529 | ||
530 | case IPV6_MULTICAST_HOPS: | |
531 | if (sk->sk_type == SOCK_STREAM) | |
532 | goto e_inval; | |
533 | if (val > 255 || val < -1) | |
534 | goto e_inval; | |
535 | np->mcast_hops = val; | |
536 | retv = 0; | |
537 | break; | |
538 | ||
539 | case IPV6_MULTICAST_LOOP: | |
540 | np->mc_loop = valbool; | |
541 | retv = 0; | |
542 | break; | |
543 | ||
544 | case IPV6_MULTICAST_IF: | |
545 | if (sk->sk_type == SOCK_STREAM) | |
546 | goto e_inval; | |
547 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) | |
548 | goto e_inval; | |
549 | ||
550 | if (__dev_get_by_index(val) == NULL) { | |
551 | retv = -ENODEV; | |
552 | break; | |
553 | } | |
554 | np->mcast_oif = val; | |
555 | retv = 0; | |
556 | break; | |
557 | case IPV6_ADD_MEMBERSHIP: | |
558 | case IPV6_DROP_MEMBERSHIP: | |
559 | { | |
560 | struct ipv6_mreq mreq; | |
561 | ||
562 | retv = -EFAULT; | |
563 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
564 | break; | |
565 | ||
566 | if (optname == IPV6_ADD_MEMBERSHIP) | |
567 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
568 | else | |
569 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
570 | break; | |
571 | } | |
572 | case IPV6_JOIN_ANYCAST: | |
573 | case IPV6_LEAVE_ANYCAST: | |
574 | { | |
575 | struct ipv6_mreq mreq; | |
576 | ||
577 | if (optlen != sizeof(struct ipv6_mreq)) | |
578 | goto e_inval; | |
579 | ||
580 | retv = -EFAULT; | |
581 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
582 | break; | |
583 | ||
584 | if (optname == IPV6_JOIN_ANYCAST) | |
585 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
586 | else | |
587 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
588 | break; | |
589 | } | |
590 | case MCAST_JOIN_GROUP: | |
591 | case MCAST_LEAVE_GROUP: | |
592 | { | |
593 | struct group_req greq; | |
594 | struct sockaddr_in6 *psin6; | |
595 | ||
596 | retv = -EFAULT; | |
597 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
598 | break; | |
599 | if (greq.gr_group.ss_family != AF_INET6) { | |
600 | retv = -EADDRNOTAVAIL; | |
601 | break; | |
602 | } | |
603 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
604 | if (optname == MCAST_JOIN_GROUP) | |
605 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, | |
606 | &psin6->sin6_addr); | |
607 | else | |
608 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, | |
609 | &psin6->sin6_addr); | |
610 | break; | |
611 | } | |
612 | case MCAST_JOIN_SOURCE_GROUP: | |
613 | case MCAST_LEAVE_SOURCE_GROUP: | |
614 | case MCAST_BLOCK_SOURCE: | |
615 | case MCAST_UNBLOCK_SOURCE: | |
616 | { | |
617 | struct group_source_req greqs; | |
618 | int omode, add; | |
619 | ||
620 | if (optlen != sizeof(struct group_source_req)) | |
621 | goto e_inval; | |
622 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
623 | retv = -EFAULT; | |
624 | break; | |
625 | } | |
626 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
627 | greqs.gsr_source.ss_family != AF_INET6) { | |
628 | retv = -EADDRNOTAVAIL; | |
629 | break; | |
630 | } | |
631 | if (optname == MCAST_BLOCK_SOURCE) { | |
632 | omode = MCAST_EXCLUDE; | |
633 | add = 1; | |
634 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
635 | omode = MCAST_EXCLUDE; | |
636 | add = 0; | |
637 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
638 | struct sockaddr_in6 *psin6; | |
639 | ||
640 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
641 | retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, | |
642 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
643 | /* prior join w/ different source is ok */ |
644 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
645 | break; |
646 | omode = MCAST_INCLUDE; | |
647 | add = 1; | |
c9e3e8b6 | 648 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
649 | omode = MCAST_INCLUDE; |
650 | add = 0; | |
651 | } | |
652 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
653 | break; | |
654 | } | |
655 | case MCAST_MSFILTER: | |
656 | { | |
1da177e4 LT |
657 | extern int sysctl_mld_max_msf; |
658 | struct group_filter *gsf; | |
659 | ||
660 | if (optlen < GROUP_FILTER_SIZE(0)) | |
661 | goto e_inval; | |
662 | if (optlen > sysctl_optmem_max) { | |
663 | retv = -ENOBUFS; | |
664 | break; | |
665 | } | |
8b3a7005 | 666 | gsf = kmalloc(optlen,GFP_KERNEL); |
1da177e4 LT |
667 | if (gsf == 0) { |
668 | retv = -ENOBUFS; | |
669 | break; | |
670 | } | |
671 | retv = -EFAULT; | |
672 | if (copy_from_user(gsf, optval, optlen)) { | |
673 | kfree(gsf); | |
674 | break; | |
675 | } | |
676 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
677 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
678 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
679 | kfree(gsf); | |
680 | retv = -ENOBUFS; | |
681 | break; | |
682 | } | |
683 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
684 | kfree(gsf); | |
685 | retv = -EINVAL; | |
686 | break; | |
687 | } | |
688 | retv = ip6_mc_msfilter(sk, gsf); | |
689 | kfree(gsf); | |
690 | ||
691 | break; | |
692 | } | |
693 | case IPV6_ROUTER_ALERT: | |
694 | retv = ip6_ra_control(sk, val, NULL); | |
695 | break; | |
696 | case IPV6_MTU_DISCOVER: | |
628a5c56 | 697 | if (val<0 || val>3) |
1da177e4 LT |
698 | goto e_inval; |
699 | np->pmtudisc = val; | |
700 | retv = 0; | |
701 | break; | |
702 | case IPV6_MTU: | |
703 | if (val && val < IPV6_MIN_MTU) | |
704 | goto e_inval; | |
705 | np->frag_size = val; | |
706 | retv = 0; | |
707 | break; | |
708 | case IPV6_RECVERR: | |
709 | np->recverr = valbool; | |
710 | if (!val) | |
711 | skb_queue_purge(&sk->sk_error_queue); | |
712 | retv = 0; | |
713 | break; | |
714 | case IPV6_FLOWINFO_SEND: | |
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 | ||
1da177e4 LT |
729 | } |
730 | release_sock(sk); | |
731 | ||
1da177e4 LT |
732 | return retv; |
733 | ||
734 | e_inval: | |
735 | release_sock(sk); | |
736 | return -EINVAL; | |
737 | } | |
738 | ||
3fdadf7d DM |
739 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
740 | char __user *optval, int optlen) | |
741 | { | |
742 | int err; | |
743 | ||
744 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
745 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
746 | ||
747 | if (level != SOL_IPV6) | |
748 | return -ENOPROTOOPT; | |
749 | ||
750 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
751 | #ifdef CONFIG_NETFILTER | |
752 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
753 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
754 | optname != IPV6_XFRM_POLICY) { | |
755 | lock_sock(sk); | |
756 | err = nf_setsockopt(sk, PF_INET6, optname, optval, | |
757 | optlen); | |
758 | release_sock(sk); | |
759 | } | |
760 | #endif | |
761 | return err; | |
762 | } | |
763 | ||
7159039a | 764 | EXPORT_SYMBOL(ipv6_setsockopt); |
3fdadf7d DM |
765 | |
766 | #ifdef CONFIG_COMPAT | |
767 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 768 | char __user *optval, int optlen) |
3fdadf7d DM |
769 | { |
770 | int err; | |
771 | ||
772 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
773 | if (udp_prot.compat_setsockopt != NULL) |
774 | return udp_prot.compat_setsockopt(sk, level, optname, | |
775 | optval, optlen); | |
776 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
777 | } |
778 | ||
779 | if (level != SOL_IPV6) | |
780 | return -ENOPROTOOPT; | |
781 | ||
782 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
783 | #ifdef CONFIG_NETFILTER | |
784 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
785 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
543d9cfe | 786 | optname != IPV6_XFRM_POLICY) { |
3fdadf7d | 787 | lock_sock(sk); |
543d9cfe ACM |
788 | err = compat_nf_setsockopt(sk, PF_INET6, optname, |
789 | optval, optlen); | |
3fdadf7d DM |
790 | release_sock(sk); |
791 | } | |
792 | #endif | |
793 | return err; | |
794 | } | |
543d9cfe ACM |
795 | |
796 | EXPORT_SYMBOL(compat_ipv6_setsockopt); | |
3fdadf7d DM |
797 | #endif |
798 | ||
28693079 | 799 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, |
4c6510a7 | 800 | int optname, char __user *optval, int len) |
333fad53 | 801 | { |
28693079 DM |
802 | struct ipv6_opt_hdr *hdr; |
803 | ||
4c6510a7 YH |
804 | if (!opt) |
805 | return 0; | |
806 | ||
807 | switch(optname) { | |
808 | case IPV6_HOPOPTS: | |
809 | hdr = opt->hopopt; | |
810 | break; | |
811 | case IPV6_RTHDRDSTOPTS: | |
812 | hdr = opt->dst0opt; | |
813 | break; | |
814 | case IPV6_RTHDR: | |
815 | hdr = (struct ipv6_opt_hdr *)opt->srcrt; | |
816 | break; | |
817 | case IPV6_DSTOPTS: | |
818 | hdr = opt->dst1opt; | |
819 | break; | |
820 | default: | |
821 | return -EINVAL; /* should not happen */ | |
822 | } | |
823 | ||
824 | if (!hdr) | |
333fad53 | 825 | return 0; |
28693079 | 826 | |
d2b02ed9 | 827 | len = min_t(unsigned int, len, ipv6_optlen(hdr)); |
e5268f12 | 828 | if (copy_to_user(optval, hdr, len)); |
333fad53 | 829 | return -EFAULT; |
e5268f12 | 830 | return ipv6_optlen(hdr); |
333fad53 YH |
831 | } |
832 | ||
3fdadf7d | 833 | static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
834 | char __user *optval, int __user *optlen) |
835 | { | |
836 | struct ipv6_pinfo *np = inet6_sk(sk); | |
837 | int len; | |
838 | int val; | |
839 | ||
1da177e4 LT |
840 | if (get_user(len, optlen)) |
841 | return -EFAULT; | |
842 | switch (optname) { | |
843 | case IPV6_ADDRFORM: | |
844 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 845 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 LT |
846 | sk->sk_protocol != IPPROTO_TCP) |
847 | return -EINVAL; | |
848 | if (sk->sk_state != TCP_ESTABLISHED) | |
849 | return -ENOTCONN; | |
850 | val = sk->sk_family; | |
851 | break; | |
852 | case MCAST_MSFILTER: | |
853 | { | |
854 | struct group_filter gsf; | |
855 | int err; | |
856 | ||
857 | if (len < GROUP_FILTER_SIZE(0)) | |
858 | return -EINVAL; | |
859 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
860 | return -EFAULT; | |
861 | lock_sock(sk); | |
862 | err = ip6_mc_msfget(sk, &gsf, | |
863 | (struct group_filter __user *)optval, optlen); | |
864 | release_sock(sk); | |
865 | return err; | |
866 | } | |
867 | ||
333fad53 | 868 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
869 | { |
870 | struct msghdr msg; | |
871 | struct sk_buff *skb; | |
872 | ||
873 | if (sk->sk_type != SOCK_STREAM) | |
874 | return -ENOPROTOOPT; | |
875 | ||
876 | msg.msg_control = optval; | |
877 | msg.msg_controllen = len; | |
878 | msg.msg_flags = 0; | |
879 | ||
880 | lock_sock(sk); | |
881 | skb = np->pktoptions; | |
882 | if (skb) | |
883 | atomic_inc(&skb->users); | |
884 | release_sock(sk); | |
885 | ||
886 | if (skb) { | |
887 | int err = datagram_recv_ctl(sk, &msg, skb); | |
888 | kfree_skb(skb); | |
889 | if (err) | |
890 | return err; | |
891 | } else { | |
892 | if (np->rxopt.bits.rxinfo) { | |
893 | struct in6_pktinfo src_info; | |
894 | src_info.ipi6_ifindex = np->mcast_oif; | |
895 | ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); | |
896 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); | |
897 | } | |
898 | if (np->rxopt.bits.rxhlim) { | |
899 | int hlim = np->mcast_hops; | |
900 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
901 | } | |
333fad53 YH |
902 | if (np->rxopt.bits.rxoinfo) { |
903 | struct in6_pktinfo src_info; | |
904 | src_info.ipi6_ifindex = np->mcast_oif; | |
905 | ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); | |
906 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); | |
907 | } | |
908 | if (np->rxopt.bits.rxohlim) { | |
909 | int hlim = np->mcast_hops; | |
910 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
911 | } | |
1da177e4 LT |
912 | } |
913 | len -= msg.msg_controllen; | |
914 | return put_user(len, optlen); | |
915 | } | |
916 | case IPV6_MTU: | |
917 | { | |
918 | struct dst_entry *dst; | |
1ab1457c | 919 | val = 0; |
1da177e4 LT |
920 | lock_sock(sk); |
921 | dst = sk_dst_get(sk); | |
922 | if (dst) { | |
923 | val = dst_mtu(dst); | |
924 | dst_release(dst); | |
925 | } | |
926 | release_sock(sk); | |
927 | if (!val) | |
928 | return -ENOTCONN; | |
929 | break; | |
930 | } | |
931 | ||
932 | case IPV6_V6ONLY: | |
933 | val = np->ipv6only; | |
934 | break; | |
935 | ||
333fad53 | 936 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
937 | val = np->rxopt.bits.rxinfo; |
938 | break; | |
939 | ||
333fad53 YH |
940 | case IPV6_2292PKTINFO: |
941 | val = np->rxopt.bits.rxoinfo; | |
942 | break; | |
943 | ||
944 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
945 | val = np->rxopt.bits.rxhlim; |
946 | break; | |
947 | ||
333fad53 YH |
948 | case IPV6_2292HOPLIMIT: |
949 | val = np->rxopt.bits.rxohlim; | |
950 | break; | |
951 | ||
952 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
953 | val = np->rxopt.bits.srcrt; |
954 | break; | |
955 | ||
333fad53 YH |
956 | case IPV6_2292RTHDR: |
957 | val = np->rxopt.bits.osrcrt; | |
958 | break; | |
959 | ||
1da177e4 | 960 | case IPV6_HOPOPTS: |
333fad53 YH |
961 | case IPV6_RTHDRDSTOPTS: |
962 | case IPV6_RTHDR: | |
963 | case IPV6_DSTOPTS: | |
964 | { | |
965 | ||
966 | lock_sock(sk); | |
28693079 | 967 | len = ipv6_getsockopt_sticky(sk, np->opt, |
4c6510a7 | 968 | optname, optval, len); |
333fad53 YH |
969 | release_sock(sk); |
970 | return put_user(len, optlen); | |
971 | } | |
972 | ||
973 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
974 | val = np->rxopt.bits.hopopts; |
975 | break; | |
976 | ||
333fad53 YH |
977 | case IPV6_2292HOPOPTS: |
978 | val = np->rxopt.bits.ohopopts; | |
979 | break; | |
980 | ||
981 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
982 | val = np->rxopt.bits.dstopts; |
983 | break; | |
984 | ||
333fad53 YH |
985 | case IPV6_2292DSTOPTS: |
986 | val = np->rxopt.bits.odstopts; | |
987 | break; | |
988 | ||
41a1f8ea YH |
989 | case IPV6_TCLASS: |
990 | val = np->tclass; | |
d0ee011f RDC |
991 | if (val < 0) |
992 | val = 0; | |
41a1f8ea YH |
993 | break; |
994 | ||
995 | case IPV6_RECVTCLASS: | |
996 | val = np->rxopt.bits.rxtclass; | |
997 | break; | |
998 | ||
1da177e4 LT |
999 | case IPV6_FLOWINFO: |
1000 | val = np->rxopt.bits.rxflow; | |
1001 | break; | |
1002 | ||
1003 | case IPV6_UNICAST_HOPS: | |
1da177e4 | 1004 | case IPV6_MULTICAST_HOPS: |
befffe90 BH |
1005 | { |
1006 | struct dst_entry *dst; | |
1007 | ||
1008 | if (optname == IPV6_UNICAST_HOPS) | |
1009 | val = np->hop_limit; | |
1010 | else | |
1011 | val = np->mcast_hops; | |
1012 | ||
1013 | dst = sk_dst_get(sk); | |
1014 | if (dst) { | |
1015 | if (val < 0) | |
1016 | val = dst_metric(dst, RTAX_HOPLIMIT); | |
1017 | if (val < 0) | |
1018 | val = ipv6_get_hoplimit(dst->dev); | |
1019 | dst_release(dst); | |
1020 | } | |
1021 | if (val < 0) | |
1022 | val = ipv6_devconf.hop_limit; | |
1da177e4 | 1023 | break; |
befffe90 | 1024 | } |
1da177e4 LT |
1025 | |
1026 | case IPV6_MULTICAST_LOOP: | |
1027 | val = np->mc_loop; | |
1028 | break; | |
1029 | ||
1030 | case IPV6_MULTICAST_IF: | |
1031 | val = np->mcast_oif; | |
1032 | break; | |
1033 | ||
1034 | case IPV6_MTU_DISCOVER: | |
1035 | val = np->pmtudisc; | |
1036 | break; | |
1037 | ||
1038 | case IPV6_RECVERR: | |
1039 | val = np->recverr; | |
1040 | break; | |
1041 | ||
1042 | case IPV6_FLOWINFO_SEND: | |
1043 | val = np->sndflow; | |
1044 | break; | |
1045 | ||
1046 | default: | |
1da177e4 | 1047 | return -EINVAL; |
1da177e4 LT |
1048 | } |
1049 | len = min_t(unsigned int, sizeof(int), len); | |
1050 | if(put_user(len, optlen)) | |
1051 | return -EFAULT; | |
1052 | if(copy_to_user(optval,&val,len)) | |
1053 | return -EFAULT; | |
1054 | return 0; | |
1055 | } | |
1056 | ||
3fdadf7d DM |
1057 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1058 | char __user *optval, int __user *optlen) | |
1059 | { | |
1060 | int err; | |
1061 | ||
1062 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
1063 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
1064 | ||
1065 | if(level != SOL_IPV6) | |
1066 | return -ENOPROTOOPT; | |
1067 | ||
1068 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); | |
1069 | #ifdef CONFIG_NETFILTER | |
1070 | /* we need to exclude all possible EINVALs except default case */ | |
443da0d5 | 1071 | if (err == -EINVAL && optname != IPV6_ADDRFORM && |
3fdadf7d DM |
1072 | optname != MCAST_MSFILTER) { |
1073 | int len; | |
1074 | ||
1075 | if (get_user(len, optlen)) | |
1076 | return -EFAULT; | |
1077 | ||
1078 | lock_sock(sk); | |
1079 | err = nf_getsockopt(sk, PF_INET6, optname, optval, | |
1080 | &len); | |
1081 | release_sock(sk); | |
1082 | if (err >= 0) | |
1083 | err = put_user(len, optlen); | |
1084 | } | |
1085 | #endif | |
1086 | return err; | |
1087 | } | |
1088 | ||
7159039a YH |
1089 | EXPORT_SYMBOL(ipv6_getsockopt); |
1090 | ||
3fdadf7d DM |
1091 | #ifdef CONFIG_COMPAT |
1092 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1093 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
1094 | { |
1095 | int err; | |
1096 | ||
1097 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
1098 | if (udp_prot.compat_getsockopt != NULL) |
1099 | return udp_prot.compat_getsockopt(sk, level, optname, | |
1100 | optval, optlen); | |
1101 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
1102 | } |
1103 | ||
543d9cfe | 1104 | if (level != SOL_IPV6) |
3fdadf7d DM |
1105 | return -ENOPROTOOPT; |
1106 | ||
1107 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); | |
1108 | #ifdef CONFIG_NETFILTER | |
1109 | /* we need to exclude all possible EINVALs except default case */ | |
443da0d5 | 1110 | if (err == -EINVAL && optname != IPV6_ADDRFORM && |
3fdadf7d DM |
1111 | optname != MCAST_MSFILTER) { |
1112 | int len; | |
1113 | ||
1114 | if (get_user(len, optlen)) | |
1115 | return -EFAULT; | |
1116 | ||
1117 | lock_sock(sk); | |
543d9cfe ACM |
1118 | err = compat_nf_getsockopt(sk, PF_INET6, |
1119 | optname, optval, &len); | |
3fdadf7d DM |
1120 | release_sock(sk); |
1121 | if (err >= 0) | |
1122 | err = put_user(len, optlen); | |
1123 | } | |
1124 | #endif | |
1125 | return err; | |
1126 | } | |
543d9cfe ACM |
1127 | |
1128 | EXPORT_SYMBOL(compat_ipv6_getsockopt); | |
3fdadf7d DM |
1129 | #endif |
1130 | ||
1da177e4 LT |
1131 | void __init ipv6_packet_init(void) |
1132 | { | |
1133 | dev_add_pack(&ipv6_packet_type); | |
1134 | } | |
1135 | ||
1136 | void ipv6_packet_cleanup(void) | |
1137 | { | |
1138 | dev_remove_pack(&ipv6_packet_type); | |
1139 | } |