2 * IPv6 BSD socket options interface
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
8 * Based on linux/net/ipv4/ip_sockglue.c
10 * $Id: ipv6_sockglue.c,v 1.41 2002/02/01 22:01:04 davem Exp $
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.
17 * FIXME: Make the setsockopt code POSIX compliant: That is
19 * o Truncate getsockopt returns
20 * o Return an optlen of the truncated length if need be
23 * David L Stevens <dlstevens@us.ibm.com>:
24 * - added multicast source filtering API for MLDv2
27 #include <linux/module.h>
28 #include <linux/capability.h>
29 #include <linux/errno.h>
30 #include <linux/types.h>
31 #include <linux/socket.h>
32 #include <linux/sockios.h>
33 #include <linux/net.h>
34 #include <linux/in6.h>
35 #include <linux/mroute6.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>
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>
53 #include <net/udplite.h>
56 #include <asm/uaccess.h>
58 DEFINE_SNMP_STAT(struct ipstats_mib
, ipv6_statistics
) __read_mostly
;
60 struct ip6_ra_chain
*ip6_ra_chain
;
61 DEFINE_RWLOCK(ip6_ra_lock
);
63 int ip6_ra_control(struct sock
*sk
, int sel
, void (*destructor
)(struct sock
*))
65 struct ip6_ra_chain
*ra
, *new_ra
, **rap
;
67 /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
68 if (sk
->sk_type
!= SOCK_RAW
|| inet_sk(sk
)->num
!= IPPROTO_RAW
)
71 new_ra
= (sel
>=0) ? kmalloc(sizeof(*new_ra
), GFP_KERNEL
) : NULL
;
73 write_lock_bh(&ip6_ra_lock
);
74 for (rap
= &ip6_ra_chain
; (ra
=*rap
) != NULL
; rap
= &ra
->next
) {
77 write_unlock_bh(&ip6_ra_lock
);
83 write_unlock_bh(&ip6_ra_lock
);
93 write_unlock_bh(&ip6_ra_lock
);
98 new_ra
->destructor
= destructor
;
102 write_unlock_bh(&ip6_ra_lock
);
107 struct ipv6_txoptions
*ipv6_update_options(struct sock
*sk
,
108 struct ipv6_txoptions
*opt
)
110 if (inet_sk(sk
)->is_icsk
) {
112 !((1 << sk
->sk_state
) & (TCPF_LISTEN
| TCPF_CLOSE
)) &&
113 inet_sk(sk
)->daddr
!= LOOPBACK4_IPV6
) {
114 struct inet_connection_sock
*icsk
= inet_csk(sk
);
115 icsk
->icsk_ext_hdr_len
= opt
->opt_flen
+ opt
->opt_nflen
;
116 icsk
->icsk_sync_mss(sk
, icsk
->icsk_pmtu_cookie
);
118 opt
= xchg(&inet6_sk(sk
)->opt
, opt
);
120 write_lock(&sk
->sk_dst_lock
);
121 opt
= xchg(&inet6_sk(sk
)->opt
, opt
);
122 write_unlock(&sk
->sk_dst_lock
);
129 static int do_ipv6_setsockopt(struct sock
*sk
, int level
, int optname
,
130 char __user
*optval
, int optlen
)
132 struct ipv6_pinfo
*np
= inet6_sk(sk
);
133 struct net
*net
= sock_net(sk
);
135 int retv
= -ENOPROTOOPT
;
140 if (optlen
>= sizeof(int)) {
141 if (get_user(val
, (int __user
*) optval
))
149 if (ip6_mroute_opt(optname
))
150 return ip6_mroute_setsockopt(sk
, optname
, optval
, optlen
);
157 if (optlen
< sizeof(int))
159 if (val
== PF_INET
) {
160 struct ipv6_txoptions
*opt
;
161 struct sk_buff
*pktopt
;
163 if (sk
->sk_protocol
!= IPPROTO_UDP
&&
164 sk
->sk_protocol
!= IPPROTO_UDPLITE
&&
165 sk
->sk_protocol
!= IPPROTO_TCP
)
168 if (sk
->sk_state
!= TCP_ESTABLISHED
) {
173 if (ipv6_only_sock(sk
) ||
174 !ipv6_addr_v4mapped(&np
->daddr
)) {
175 retv
= -EADDRNOTAVAIL
;
179 fl6_free_socklist(sk
);
180 ipv6_sock_mc_close(sk
);
183 * Sock is moving from IPv6 to IPv4 (sk_prot), so
184 * remove it from the refcnt debug socks count in the
187 sk_refcnt_debug_dec(sk
);
189 if (sk
->sk_protocol
== IPPROTO_TCP
) {
190 struct inet_connection_sock
*icsk
= inet_csk(sk
);
192 sock_prot_inuse_add(net
, sk
->sk_prot
, -1);
193 sock_prot_inuse_add(net
, &tcp_prot
, 1);
195 sk
->sk_prot
= &tcp_prot
;
196 icsk
->icsk_af_ops
= &ipv4_specific
;
197 sk
->sk_socket
->ops
= &inet_stream_ops
;
198 sk
->sk_family
= PF_INET
;
199 tcp_sync_mss(sk
, icsk
->icsk_pmtu_cookie
);
201 struct proto
*prot
= &udp_prot
;
203 if (sk
->sk_protocol
== IPPROTO_UDPLITE
)
204 prot
= &udplite_prot
;
206 sock_prot_inuse_add(net
, sk
->sk_prot
, -1);
207 sock_prot_inuse_add(net
, prot
, 1);
210 sk
->sk_socket
->ops
= &inet_dgram_ops
;
211 sk
->sk_family
= PF_INET
;
213 opt
= xchg(&np
->opt
, NULL
);
215 sock_kfree_s(sk
, opt
, opt
->tot_len
);
216 pktopt
= xchg(&np
->pktoptions
, NULL
);
220 sk
->sk_destruct
= inet_sock_destruct
;
222 * ... and add it to the refcnt debug socks count
223 * in the new family. -acme
225 sk_refcnt_debug_inc(sk
);
226 module_put(THIS_MODULE
);
233 if (optlen
< sizeof(int) ||
236 np
->ipv6only
= valbool
;
240 case IPV6_RECVPKTINFO
:
241 if (optlen
< sizeof(int))
243 np
->rxopt
.bits
.rxinfo
= valbool
;
247 case IPV6_2292PKTINFO
:
248 if (optlen
< sizeof(int))
250 np
->rxopt
.bits
.rxoinfo
= valbool
;
254 case IPV6_RECVHOPLIMIT
:
255 if (optlen
< sizeof(int))
257 np
->rxopt
.bits
.rxhlim
= valbool
;
261 case IPV6_2292HOPLIMIT
:
262 if (optlen
< sizeof(int))
264 np
->rxopt
.bits
.rxohlim
= valbool
;
269 if (optlen
< sizeof(int))
271 np
->rxopt
.bits
.srcrt
= valbool
;
276 if (optlen
< sizeof(int))
278 np
->rxopt
.bits
.osrcrt
= valbool
;
282 case IPV6_RECVHOPOPTS
:
283 if (optlen
< sizeof(int))
285 np
->rxopt
.bits
.hopopts
= valbool
;
289 case IPV6_2292HOPOPTS
:
290 if (optlen
< sizeof(int))
292 np
->rxopt
.bits
.ohopopts
= valbool
;
296 case IPV6_RECVDSTOPTS
:
297 if (optlen
< sizeof(int))
299 np
->rxopt
.bits
.dstopts
= valbool
;
303 case IPV6_2292DSTOPTS
:
304 if (optlen
< sizeof(int))
306 np
->rxopt
.bits
.odstopts
= valbool
;
311 if (optlen
< sizeof(int))
313 if (val
< -1 || val
> 0xff)
319 case IPV6_RECVTCLASS
:
320 if (optlen
< sizeof(int))
322 np
->rxopt
.bits
.rxtclass
= valbool
;
327 if (optlen
< sizeof(int))
329 np
->rxopt
.bits
.rxflow
= valbool
;
334 case IPV6_RTHDRDSTOPTS
:
338 struct ipv6_txoptions
*opt
;
342 /* hop-by-hop / destination options are privileged option */
344 if (optname
!= IPV6_RTHDR
&& !capable(CAP_NET_RAW
))
347 if (optlen
< sizeof(struct ipv6_opt_hdr
) ||
348 optlen
& 0x7 || optlen
> 8 * 255)
351 opt
= ipv6_renew_options(sk
, np
->opt
, optname
,
352 (struct ipv6_opt_hdr __user
*)optval
,
359 /* routing header option needs extra check */
360 if (optname
== IPV6_RTHDR
&& opt
&& opt
->srcrt
) {
361 struct ipv6_rt_hdr
*rthdr
= opt
->srcrt
;
362 switch (rthdr
->type
) {
363 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
364 case IPV6_SRCRT_TYPE_2
:
371 if ((rthdr
->hdrlen
& 1) ||
372 (rthdr
->hdrlen
>> 1) != rthdr
->segments_left
)
377 opt
= ipv6_update_options(sk
, opt
);
380 sock_kfree_s(sk
, opt
, opt
->tot_len
);
384 case IPV6_2292PKTOPTIONS
:
386 struct ipv6_txoptions
*opt
= NULL
;
391 fl
.fl6_flowlabel
= 0;
392 fl
.oif
= sk
->sk_bound_dev_if
;
397 /* 1K is probably excessive
398 * 1K is surely not enough, 2K per standard header is 16K.
401 if (optlen
> 64*1024)
404 opt
= sock_kmalloc(sk
, sizeof(*opt
) + optlen
, GFP_KERNEL
);
409 memset(opt
, 0, sizeof(*opt
));
410 opt
->tot_len
= sizeof(*opt
) + optlen
;
412 if (copy_from_user(opt
+1, optval
, optlen
))
415 msg
.msg_controllen
= optlen
;
416 msg
.msg_control
= (void*)(opt
+1);
418 retv
= datagram_send_ctl(&msg
, &fl
, opt
, &junk
, &junk
);
423 opt
= ipv6_update_options(sk
, opt
);
426 sock_kfree_s(sk
, opt
, opt
->tot_len
);
429 case IPV6_UNICAST_HOPS
:
430 if (optlen
< sizeof(int))
432 if (val
> 255 || val
< -1)
438 case IPV6_MULTICAST_HOPS
:
439 if (sk
->sk_type
== SOCK_STREAM
)
441 if (optlen
< sizeof(int))
443 if (val
> 255 || val
< -1)
445 np
->mcast_hops
= val
;
449 case IPV6_MULTICAST_LOOP
:
450 if (optlen
< sizeof(int))
452 np
->mc_loop
= valbool
;
456 case IPV6_MULTICAST_IF
:
457 if (sk
->sk_type
== SOCK_STREAM
)
459 if (optlen
< sizeof(int))
463 if (sk
->sk_bound_dev_if
&& sk
->sk_bound_dev_if
!= val
)
466 if (__dev_get_by_index(net
, val
) == NULL
) {
474 case IPV6_ADD_MEMBERSHIP
:
475 case IPV6_DROP_MEMBERSHIP
:
477 struct ipv6_mreq mreq
;
479 if (optlen
< sizeof(struct ipv6_mreq
))
483 if (inet_sk(sk
)->is_icsk
)
487 if (copy_from_user(&mreq
, optval
, sizeof(struct ipv6_mreq
)))
490 if (optname
== IPV6_ADD_MEMBERSHIP
)
491 retv
= ipv6_sock_mc_join(sk
, mreq
.ipv6mr_ifindex
, &mreq
.ipv6mr_multiaddr
);
493 retv
= ipv6_sock_mc_drop(sk
, mreq
.ipv6mr_ifindex
, &mreq
.ipv6mr_multiaddr
);
496 case IPV6_JOIN_ANYCAST
:
497 case IPV6_LEAVE_ANYCAST
:
499 struct ipv6_mreq mreq
;
501 if (optlen
< sizeof(struct ipv6_mreq
))
505 if (copy_from_user(&mreq
, optval
, sizeof(struct ipv6_mreq
)))
508 if (optname
== IPV6_JOIN_ANYCAST
)
509 retv
= ipv6_sock_ac_join(sk
, mreq
.ipv6mr_ifindex
, &mreq
.ipv6mr_acaddr
);
511 retv
= ipv6_sock_ac_drop(sk
, mreq
.ipv6mr_ifindex
, &mreq
.ipv6mr_acaddr
);
514 case MCAST_JOIN_GROUP
:
515 case MCAST_LEAVE_GROUP
:
517 struct group_req greq
;
518 struct sockaddr_in6
*psin6
;
520 if (optlen
< sizeof(struct group_req
))
524 if (copy_from_user(&greq
, optval
, sizeof(struct group_req
)))
526 if (greq
.gr_group
.ss_family
!= AF_INET6
) {
527 retv
= -EADDRNOTAVAIL
;
530 psin6
= (struct sockaddr_in6
*)&greq
.gr_group
;
531 if (optname
== MCAST_JOIN_GROUP
)
532 retv
= ipv6_sock_mc_join(sk
, greq
.gr_interface
,
535 retv
= ipv6_sock_mc_drop(sk
, greq
.gr_interface
,
539 case MCAST_JOIN_SOURCE_GROUP
:
540 case MCAST_LEAVE_SOURCE_GROUP
:
541 case MCAST_BLOCK_SOURCE
:
542 case MCAST_UNBLOCK_SOURCE
:
544 struct group_source_req greqs
;
547 if (optlen
< sizeof(struct group_source_req
))
549 if (copy_from_user(&greqs
, optval
, sizeof(greqs
))) {
553 if (greqs
.gsr_group
.ss_family
!= AF_INET6
||
554 greqs
.gsr_source
.ss_family
!= AF_INET6
) {
555 retv
= -EADDRNOTAVAIL
;
558 if (optname
== MCAST_BLOCK_SOURCE
) {
559 omode
= MCAST_EXCLUDE
;
561 } else if (optname
== MCAST_UNBLOCK_SOURCE
) {
562 omode
= MCAST_EXCLUDE
;
564 } else if (optname
== MCAST_JOIN_SOURCE_GROUP
) {
565 struct sockaddr_in6
*psin6
;
567 psin6
= (struct sockaddr_in6
*)&greqs
.gsr_group
;
568 retv
= ipv6_sock_mc_join(sk
, greqs
.gsr_interface
,
570 /* prior join w/ different source is ok */
571 if (retv
&& retv
!= -EADDRINUSE
)
573 omode
= MCAST_INCLUDE
;
575 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
576 omode
= MCAST_INCLUDE
;
579 retv
= ip6_mc_source(add
, omode
, sk
, &greqs
);
584 extern int sysctl_mld_max_msf
;
585 struct group_filter
*gsf
;
587 if (optlen
< GROUP_FILTER_SIZE(0))
589 if (optlen
> sysctl_optmem_max
) {
593 gsf
= kmalloc(optlen
,GFP_KERNEL
);
599 if (copy_from_user(gsf
, optval
, optlen
)) {
603 /* numsrc >= (4G-140)/128 overflow in 32 bits */
604 if (gsf
->gf_numsrc
>= 0x1ffffffU
||
605 gsf
->gf_numsrc
> sysctl_mld_max_msf
) {
610 if (GROUP_FILTER_SIZE(gsf
->gf_numsrc
) > optlen
) {
615 retv
= ip6_mc_msfilter(sk
, gsf
);
620 case IPV6_ROUTER_ALERT
:
621 if (optlen
< sizeof(int))
623 retv
= ip6_ra_control(sk
, val
, NULL
);
625 case IPV6_MTU_DISCOVER
:
626 if (optlen
< sizeof(int))
634 if (optlen
< sizeof(int))
636 if (val
&& val
< IPV6_MIN_MTU
)
642 if (optlen
< sizeof(int))
644 np
->recverr
= valbool
;
646 skb_queue_purge(&sk
->sk_error_queue
);
649 case IPV6_FLOWINFO_SEND
:
650 if (optlen
< sizeof(int))
652 np
->sndflow
= valbool
;
655 case IPV6_FLOWLABEL_MGR
:
656 retv
= ipv6_flowlabel_opt(sk
, optval
, optlen
);
658 case IPV6_IPSEC_POLICY
:
659 case IPV6_XFRM_POLICY
:
661 if (!capable(CAP_NET_ADMIN
))
663 retv
= xfrm_user_policy(sk
, optname
, optval
, optlen
);
666 case IPV6_ADDR_PREFERENCES
:
668 unsigned int pref
= 0;
669 unsigned int prefmask
= ~0;
671 if (optlen
< sizeof(int))
676 /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */
677 switch (val
& (IPV6_PREFER_SRC_PUBLIC
|
679 IPV6_PREFER_SRC_PUBTMP_DEFAULT
)) {
680 case IPV6_PREFER_SRC_PUBLIC
:
681 pref
|= IPV6_PREFER_SRC_PUBLIC
;
683 case IPV6_PREFER_SRC_TMP
:
684 pref
|= IPV6_PREFER_SRC_TMP
;
686 case IPV6_PREFER_SRC_PUBTMP_DEFAULT
:
689 goto pref_skip_pubtmp
;
694 prefmask
&= ~(IPV6_PREFER_SRC_PUBLIC
|
695 IPV6_PREFER_SRC_TMP
);
698 /* check HOME/COA conflicts */
699 switch (val
& (IPV6_PREFER_SRC_HOME
|IPV6_PREFER_SRC_COA
)) {
700 case IPV6_PREFER_SRC_HOME
:
702 case IPV6_PREFER_SRC_COA
:
703 pref
|= IPV6_PREFER_SRC_COA
;
710 prefmask
&= ~IPV6_PREFER_SRC_COA
;
713 /* check CGA/NONCGA conflicts */
714 switch (val
& (IPV6_PREFER_SRC_CGA
|IPV6_PREFER_SRC_NONCGA
)) {
715 case IPV6_PREFER_SRC_CGA
:
716 case IPV6_PREFER_SRC_NONCGA
:
723 np
->srcprefs
= (np
->srcprefs
& prefmask
) | pref
;
739 int ipv6_setsockopt(struct sock
*sk
, int level
, int optname
,
740 char __user
*optval
, int optlen
)
744 if (level
== SOL_IP
&& sk
->sk_type
!= SOCK_RAW
)
745 return udp_prot
.setsockopt(sk
, level
, optname
, optval
, optlen
);
747 if (level
!= SOL_IPV6
)
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
) {
756 err
= nf_setsockopt(sk
, PF_INET6
, optname
, optval
,
764 EXPORT_SYMBOL(ipv6_setsockopt
);
767 int compat_ipv6_setsockopt(struct sock
*sk
, int level
, int optname
,
768 char __user
*optval
, int optlen
)
772 if (level
== SOL_IP
&& sk
->sk_type
!= SOCK_RAW
) {
773 if (udp_prot
.compat_setsockopt
!= NULL
)
774 return udp_prot
.compat_setsockopt(sk
, level
, optname
,
776 return udp_prot
.setsockopt(sk
, level
, optname
, optval
, optlen
);
779 if (level
!= SOL_IPV6
)
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
&&
786 optname
!= IPV6_XFRM_POLICY
) {
788 err
= compat_nf_setsockopt(sk
, PF_INET6
, optname
,
796 EXPORT_SYMBOL(compat_ipv6_setsockopt
);
799 static int ipv6_getsockopt_sticky(struct sock
*sk
, struct ipv6_txoptions
*opt
,
800 int optname
, char __user
*optval
, int len
)
802 struct ipv6_opt_hdr
*hdr
;
811 case IPV6_RTHDRDSTOPTS
:
815 hdr
= (struct ipv6_opt_hdr
*)opt
->srcrt
;
821 return -EINVAL
; /* should not happen */
827 len
= min_t(unsigned int, len
, ipv6_optlen(hdr
));
828 if (copy_to_user(optval
, hdr
, len
))
830 return ipv6_optlen(hdr
);
833 static int do_ipv6_getsockopt(struct sock
*sk
, int level
, int optname
,
834 char __user
*optval
, int __user
*optlen
)
836 struct ipv6_pinfo
*np
= inet6_sk(sk
);
840 if (ip6_mroute_opt(optname
))
841 return ip6_mroute_getsockopt(sk
, optname
, optval
, optlen
);
843 if (get_user(len
, optlen
))
847 if (sk
->sk_protocol
!= IPPROTO_UDP
&&
848 sk
->sk_protocol
!= IPPROTO_UDPLITE
&&
849 sk
->sk_protocol
!= IPPROTO_TCP
)
851 if (sk
->sk_state
!= TCP_ESTABLISHED
)
857 struct group_filter gsf
;
860 if (len
< GROUP_FILTER_SIZE(0))
862 if (copy_from_user(&gsf
, optval
, GROUP_FILTER_SIZE(0)))
865 err
= ip6_mc_msfget(sk
, &gsf
,
866 (struct group_filter __user
*)optval
, optlen
);
871 case IPV6_2292PKTOPTIONS
:
876 if (sk
->sk_type
!= SOCK_STREAM
)
879 msg
.msg_control
= optval
;
880 msg
.msg_controllen
= len
;
884 skb
= np
->pktoptions
;
886 atomic_inc(&skb
->users
);
890 int err
= datagram_recv_ctl(sk
, &msg
, skb
);
895 if (np
->rxopt
.bits
.rxinfo
) {
896 struct in6_pktinfo src_info
;
897 src_info
.ipi6_ifindex
= np
->mcast_oif
;
898 ipv6_addr_copy(&src_info
.ipi6_addr
, &np
->daddr
);
899 put_cmsg(&msg
, SOL_IPV6
, IPV6_PKTINFO
, sizeof(src_info
), &src_info
);
901 if (np
->rxopt
.bits
.rxhlim
) {
902 int hlim
= np
->mcast_hops
;
903 put_cmsg(&msg
, SOL_IPV6
, IPV6_HOPLIMIT
, sizeof(hlim
), &hlim
);
905 if (np
->rxopt
.bits
.rxoinfo
) {
906 struct in6_pktinfo src_info
;
907 src_info
.ipi6_ifindex
= np
->mcast_oif
;
908 ipv6_addr_copy(&src_info
.ipi6_addr
, &np
->daddr
);
909 put_cmsg(&msg
, SOL_IPV6
, IPV6_2292PKTINFO
, sizeof(src_info
), &src_info
);
911 if (np
->rxopt
.bits
.rxohlim
) {
912 int hlim
= np
->mcast_hops
;
913 put_cmsg(&msg
, SOL_IPV6
, IPV6_2292HOPLIMIT
, sizeof(hlim
), &hlim
);
916 len
-= msg
.msg_controllen
;
917 return put_user(len
, optlen
);
921 struct dst_entry
*dst
;
924 dst
= sk_dst_get(sk
);
939 case IPV6_RECVPKTINFO
:
940 val
= np
->rxopt
.bits
.rxinfo
;
943 case IPV6_2292PKTINFO
:
944 val
= np
->rxopt
.bits
.rxoinfo
;
947 case IPV6_RECVHOPLIMIT
:
948 val
= np
->rxopt
.bits
.rxhlim
;
951 case IPV6_2292HOPLIMIT
:
952 val
= np
->rxopt
.bits
.rxohlim
;
956 val
= np
->rxopt
.bits
.srcrt
;
960 val
= np
->rxopt
.bits
.osrcrt
;
964 case IPV6_RTHDRDSTOPTS
:
970 len
= ipv6_getsockopt_sticky(sk
, np
->opt
,
971 optname
, optval
, len
);
973 return put_user(len
, optlen
);
976 case IPV6_RECVHOPOPTS
:
977 val
= np
->rxopt
.bits
.hopopts
;
980 case IPV6_2292HOPOPTS
:
981 val
= np
->rxopt
.bits
.ohopopts
;
984 case IPV6_RECVDSTOPTS
:
985 val
= np
->rxopt
.bits
.dstopts
;
988 case IPV6_2292DSTOPTS
:
989 val
= np
->rxopt
.bits
.odstopts
;
998 case IPV6_RECVTCLASS
:
999 val
= np
->rxopt
.bits
.rxtclass
;
1003 val
= np
->rxopt
.bits
.rxflow
;
1006 case IPV6_UNICAST_HOPS
:
1007 case IPV6_MULTICAST_HOPS
:
1009 struct dst_entry
*dst
;
1011 if (optname
== IPV6_UNICAST_HOPS
)
1012 val
= np
->hop_limit
;
1014 val
= np
->mcast_hops
;
1016 dst
= sk_dst_get(sk
);
1019 val
= ip6_dst_hoplimit(dst
);
1023 val
= ipv6_devconf
.hop_limit
;
1027 case IPV6_MULTICAST_LOOP
:
1031 case IPV6_MULTICAST_IF
:
1032 val
= np
->mcast_oif
;
1035 case IPV6_MTU_DISCOVER
:
1043 case IPV6_FLOWINFO_SEND
:
1047 case IPV6_ADDR_PREFERENCES
:
1050 if (np
->srcprefs
& IPV6_PREFER_SRC_TMP
)
1051 val
|= IPV6_PREFER_SRC_TMP
;
1052 else if (np
->srcprefs
& IPV6_PREFER_SRC_PUBLIC
)
1053 val
|= IPV6_PREFER_SRC_PUBLIC
;
1055 /* XXX: should we return system default? */
1056 val
|= IPV6_PREFER_SRC_PUBTMP_DEFAULT
;
1059 if (np
->srcprefs
& IPV6_PREFER_SRC_COA
)
1060 val
|= IPV6_PREFER_SRC_COA
;
1062 val
|= IPV6_PREFER_SRC_HOME
;
1066 return -ENOPROTOOPT
;
1068 len
= min_t(unsigned int, sizeof(int), len
);
1069 if(put_user(len
, optlen
))
1071 if(copy_to_user(optval
,&val
,len
))
1076 int ipv6_getsockopt(struct sock
*sk
, int level
, int optname
,
1077 char __user
*optval
, int __user
*optlen
)
1081 if (level
== SOL_IP
&& sk
->sk_type
!= SOCK_RAW
)
1082 return udp_prot
.getsockopt(sk
, level
, optname
, optval
, optlen
);
1084 if(level
!= SOL_IPV6
)
1085 return -ENOPROTOOPT
;
1087 err
= do_ipv6_getsockopt(sk
, level
, optname
, optval
, optlen
);
1088 #ifdef CONFIG_NETFILTER
1089 /* we need to exclude all possible ENOPROTOOPTs except default case */
1090 if (err
== -ENOPROTOOPT
&& optname
!= IPV6_2292PKTOPTIONS
) {
1093 if (get_user(len
, optlen
))
1097 err
= nf_getsockopt(sk
, PF_INET6
, optname
, optval
,
1101 err
= put_user(len
, optlen
);
1107 EXPORT_SYMBOL(ipv6_getsockopt
);
1109 #ifdef CONFIG_COMPAT
1110 int compat_ipv6_getsockopt(struct sock
*sk
, int level
, int optname
,
1111 char __user
*optval
, int __user
*optlen
)
1115 if (level
== SOL_IP
&& sk
->sk_type
!= SOCK_RAW
) {
1116 if (udp_prot
.compat_getsockopt
!= NULL
)
1117 return udp_prot
.compat_getsockopt(sk
, level
, optname
,
1119 return udp_prot
.getsockopt(sk
, level
, optname
, optval
, optlen
);
1122 if (level
!= SOL_IPV6
)
1123 return -ENOPROTOOPT
;
1125 err
= do_ipv6_getsockopt(sk
, level
, optname
, optval
, optlen
);
1126 #ifdef CONFIG_NETFILTER
1127 /* we need to exclude all possible ENOPROTOOPTs except default case */
1128 if (err
== -ENOPROTOOPT
&& optname
!= IPV6_2292PKTOPTIONS
) {
1131 if (get_user(len
, optlen
))
1135 err
= compat_nf_getsockopt(sk
, PF_INET6
,
1136 optname
, optval
, &len
);
1139 err
= put_user(len
, optlen
);
1145 EXPORT_SYMBOL(compat_ipv6_getsockopt
);