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 Return -EINVAL for setsockopt of short lengths
20 * o Truncate getsockopt returns
21 * o Return an optlen of the truncated length if need be
24 * David L Stevens <dlstevens@us.ibm.com>:
25 * - added multicast source filtering API for MLDv2
28 #include <linux/module.h>
29 #include <linux/capability.h>
30 #include <linux/errno.h>
31 #include <linux/types.h>
32 #include <linux/socket.h>
33 #include <linux/sockios.h>
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>
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
);
106 static int do_ipv6_setsockopt(struct sock
*sk
, int level
, int optname
,
107 char __user
*optval
, int optlen
)
109 struct ipv6_pinfo
*np
= inet6_sk(sk
);
110 struct net
*net
= sk
->sk_net
;
112 int retv
= -ENOPROTOOPT
;
116 else if (get_user(val
, (int __user
*) optval
))
126 if (val
== PF_INET
) {
127 struct ipv6_txoptions
*opt
;
128 struct sk_buff
*pktopt
;
130 if (sk
->sk_protocol
!= IPPROTO_UDP
&&
131 sk
->sk_protocol
!= IPPROTO_UDPLITE
&&
132 sk
->sk_protocol
!= IPPROTO_TCP
)
135 if (sk
->sk_state
!= TCP_ESTABLISHED
) {
140 if (ipv6_only_sock(sk
) ||
141 !ipv6_addr_v4mapped(&np
->daddr
)) {
142 retv
= -EADDRNOTAVAIL
;
146 fl6_free_socklist(sk
);
147 ipv6_sock_mc_close(sk
);
150 * Sock is moving from IPv6 to IPv4 (sk_prot), so
151 * remove it from the refcnt debug socks count in the
154 sk_refcnt_debug_dec(sk
);
156 if (sk
->sk_protocol
== IPPROTO_TCP
) {
157 struct inet_connection_sock
*icsk
= inet_csk(sk
);
160 sock_prot_inuse_add(sk
->sk_prot
, -1);
161 sock_prot_inuse_add(&tcp_prot
, 1);
163 sk
->sk_prot
= &tcp_prot
;
164 icsk
->icsk_af_ops
= &ipv4_specific
;
165 sk
->sk_socket
->ops
= &inet_stream_ops
;
166 sk
->sk_family
= PF_INET
;
167 tcp_sync_mss(sk
, icsk
->icsk_pmtu_cookie
);
169 struct proto
*prot
= &udp_prot
;
171 if (sk
->sk_protocol
== IPPROTO_UDPLITE
)
172 prot
= &udplite_prot
;
174 sock_prot_inuse_add(sk
->sk_prot
, -1);
175 sock_prot_inuse_add(prot
, 1);
178 sk
->sk_socket
->ops
= &inet_dgram_ops
;
179 sk
->sk_family
= PF_INET
;
181 opt
= xchg(&np
->opt
, NULL
);
183 sock_kfree_s(sk
, opt
, opt
->tot_len
);
184 pktopt
= xchg(&np
->pktoptions
, NULL
);
188 sk
->sk_destruct
= inet_sock_destruct
;
190 * ... and add it to the refcnt debug socks count
191 * in the new family. -acme
193 sk_refcnt_debug_inc(sk
);
194 module_put(THIS_MODULE
);
201 if (inet_sk(sk
)->num
)
203 np
->ipv6only
= valbool
;
207 case IPV6_RECVPKTINFO
:
208 np
->rxopt
.bits
.rxinfo
= valbool
;
212 case IPV6_2292PKTINFO
:
213 np
->rxopt
.bits
.rxoinfo
= valbool
;
217 case IPV6_RECVHOPLIMIT
:
218 np
->rxopt
.bits
.rxhlim
= valbool
;
222 case IPV6_2292HOPLIMIT
:
223 np
->rxopt
.bits
.rxohlim
= valbool
;
228 np
->rxopt
.bits
.srcrt
= valbool
;
233 np
->rxopt
.bits
.osrcrt
= valbool
;
237 case IPV6_RECVHOPOPTS
:
238 np
->rxopt
.bits
.hopopts
= valbool
;
242 case IPV6_2292HOPOPTS
:
243 np
->rxopt
.bits
.ohopopts
= valbool
;
247 case IPV6_RECVDSTOPTS
:
248 np
->rxopt
.bits
.dstopts
= valbool
;
252 case IPV6_2292DSTOPTS
:
253 np
->rxopt
.bits
.odstopts
= valbool
;
258 if (val
< -1 || val
> 0xff)
264 case IPV6_RECVTCLASS
:
265 np
->rxopt
.bits
.rxtclass
= valbool
;
270 np
->rxopt
.bits
.rxflow
= valbool
;
275 case IPV6_RTHDRDSTOPTS
:
279 struct ipv6_txoptions
*opt
;
283 /* hop-by-hop / destination options are privileged option */
285 if (optname
!= IPV6_RTHDR
&& !capable(CAP_NET_RAW
))
289 if (optlen
& 0x7 || optlen
> 8 * 255)
292 opt
= ipv6_renew_options(sk
, np
->opt
, optname
,
293 (struct ipv6_opt_hdr __user
*)optval
,
300 /* routing header option needs extra check */
301 if (optname
== IPV6_RTHDR
&& opt
&& opt
->srcrt
) {
302 struct ipv6_rt_hdr
*rthdr
= opt
->srcrt
;
303 switch (rthdr
->type
) {
304 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
305 case IPV6_SRCRT_TYPE_2
:
312 if ((rthdr
->hdrlen
& 1) ||
313 (rthdr
->hdrlen
>> 1) != rthdr
->segments_left
)
318 if (inet_sk(sk
)->is_icsk
) {
320 struct inet_connection_sock
*icsk
= inet_csk(sk
);
321 if (!((1 << sk
->sk_state
) &
322 (TCPF_LISTEN
| TCPF_CLOSE
))
323 && inet_sk(sk
)->daddr
!= LOOPBACK4_IPV6
) {
324 icsk
->icsk_ext_hdr_len
=
325 opt
->opt_flen
+ opt
->opt_nflen
;
326 icsk
->icsk_sync_mss(sk
, icsk
->icsk_pmtu_cookie
);
329 opt
= xchg(&np
->opt
, opt
);
332 write_lock(&sk
->sk_dst_lock
);
333 opt
= xchg(&np
->opt
, opt
);
334 write_unlock(&sk
->sk_dst_lock
);
339 sock_kfree_s(sk
, opt
, opt
->tot_len
);
343 case IPV6_2292PKTOPTIONS
:
345 struct ipv6_txoptions
*opt
= NULL
;
350 fl
.fl6_flowlabel
= 0;
351 fl
.oif
= sk
->sk_bound_dev_if
;
356 /* 1K is probably excessive
357 * 1K is surely not enough, 2K per standard header is 16K.
360 if (optlen
> 64*1024)
363 opt
= sock_kmalloc(sk
, sizeof(*opt
) + optlen
, GFP_KERNEL
);
368 memset(opt
, 0, sizeof(*opt
));
369 opt
->tot_len
= sizeof(*opt
) + optlen
;
371 if (copy_from_user(opt
+1, optval
, optlen
))
374 msg
.msg_controllen
= optlen
;
375 msg
.msg_control
= (void*)(opt
+1);
377 retv
= datagram_send_ctl(&msg
, &fl
, opt
, &junk
, &junk
);
382 if (inet_sk(sk
)->is_icsk
) {
384 struct inet_connection_sock
*icsk
= inet_csk(sk
);
385 if (!((1 << sk
->sk_state
) &
386 (TCPF_LISTEN
| TCPF_CLOSE
))
387 && inet_sk(sk
)->daddr
!= LOOPBACK4_IPV6
) {
388 icsk
->icsk_ext_hdr_len
=
389 opt
->opt_flen
+ opt
->opt_nflen
;
390 icsk
->icsk_sync_mss(sk
, icsk
->icsk_pmtu_cookie
);
393 opt
= xchg(&np
->opt
, opt
);
396 write_lock(&sk
->sk_dst_lock
);
397 opt
= xchg(&np
->opt
, opt
);
398 write_unlock(&sk
->sk_dst_lock
);
404 sock_kfree_s(sk
, opt
, opt
->tot_len
);
407 case IPV6_UNICAST_HOPS
:
408 if (val
> 255 || val
< -1)
414 case IPV6_MULTICAST_HOPS
:
415 if (sk
->sk_type
== SOCK_STREAM
)
417 if (val
> 255 || val
< -1)
419 np
->mcast_hops
= val
;
423 case IPV6_MULTICAST_LOOP
:
424 np
->mc_loop
= valbool
;
428 case IPV6_MULTICAST_IF
:
429 if (sk
->sk_type
== SOCK_STREAM
)
433 if (sk
->sk_bound_dev_if
&& sk
->sk_bound_dev_if
!= val
)
436 if (__dev_get_by_index(net
, val
) == NULL
) {
444 case IPV6_ADD_MEMBERSHIP
:
445 case IPV6_DROP_MEMBERSHIP
:
447 struct ipv6_mreq mreq
;
450 if (inet_sk(sk
)->is_icsk
)
454 if (copy_from_user(&mreq
, optval
, sizeof(struct ipv6_mreq
)))
457 if (optname
== IPV6_ADD_MEMBERSHIP
)
458 retv
= ipv6_sock_mc_join(sk
, mreq
.ipv6mr_ifindex
, &mreq
.ipv6mr_multiaddr
);
460 retv
= ipv6_sock_mc_drop(sk
, mreq
.ipv6mr_ifindex
, &mreq
.ipv6mr_multiaddr
);
463 case IPV6_JOIN_ANYCAST
:
464 case IPV6_LEAVE_ANYCAST
:
466 struct ipv6_mreq mreq
;
468 if (optlen
!= sizeof(struct ipv6_mreq
))
472 if (copy_from_user(&mreq
, optval
, sizeof(struct ipv6_mreq
)))
475 if (optname
== IPV6_JOIN_ANYCAST
)
476 retv
= ipv6_sock_ac_join(sk
, mreq
.ipv6mr_ifindex
, &mreq
.ipv6mr_acaddr
);
478 retv
= ipv6_sock_ac_drop(sk
, mreq
.ipv6mr_ifindex
, &mreq
.ipv6mr_acaddr
);
481 case MCAST_JOIN_GROUP
:
482 case MCAST_LEAVE_GROUP
:
484 struct group_req greq
;
485 struct sockaddr_in6
*psin6
;
488 if (copy_from_user(&greq
, optval
, sizeof(struct group_req
)))
490 if (greq
.gr_group
.ss_family
!= AF_INET6
) {
491 retv
= -EADDRNOTAVAIL
;
494 psin6
= (struct sockaddr_in6
*)&greq
.gr_group
;
495 if (optname
== MCAST_JOIN_GROUP
)
496 retv
= ipv6_sock_mc_join(sk
, greq
.gr_interface
,
499 retv
= ipv6_sock_mc_drop(sk
, greq
.gr_interface
,
503 case MCAST_JOIN_SOURCE_GROUP
:
504 case MCAST_LEAVE_SOURCE_GROUP
:
505 case MCAST_BLOCK_SOURCE
:
506 case MCAST_UNBLOCK_SOURCE
:
508 struct group_source_req greqs
;
511 if (optlen
!= sizeof(struct group_source_req
))
513 if (copy_from_user(&greqs
, optval
, sizeof(greqs
))) {
517 if (greqs
.gsr_group
.ss_family
!= AF_INET6
||
518 greqs
.gsr_source
.ss_family
!= AF_INET6
) {
519 retv
= -EADDRNOTAVAIL
;
522 if (optname
== MCAST_BLOCK_SOURCE
) {
523 omode
= MCAST_EXCLUDE
;
525 } else if (optname
== MCAST_UNBLOCK_SOURCE
) {
526 omode
= MCAST_EXCLUDE
;
528 } else if (optname
== MCAST_JOIN_SOURCE_GROUP
) {
529 struct sockaddr_in6
*psin6
;
531 psin6
= (struct sockaddr_in6
*)&greqs
.gsr_group
;
532 retv
= ipv6_sock_mc_join(sk
, greqs
.gsr_interface
,
534 /* prior join w/ different source is ok */
535 if (retv
&& retv
!= -EADDRINUSE
)
537 omode
= MCAST_INCLUDE
;
539 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
540 omode
= MCAST_INCLUDE
;
543 retv
= ip6_mc_source(add
, omode
, sk
, &greqs
);
548 extern int sysctl_mld_max_msf
;
549 struct group_filter
*gsf
;
551 if (optlen
< GROUP_FILTER_SIZE(0))
553 if (optlen
> sysctl_optmem_max
) {
557 gsf
= kmalloc(optlen
,GFP_KERNEL
);
563 if (copy_from_user(gsf
, optval
, optlen
)) {
567 /* numsrc >= (4G-140)/128 overflow in 32 bits */
568 if (gsf
->gf_numsrc
>= 0x1ffffffU
||
569 gsf
->gf_numsrc
> sysctl_mld_max_msf
) {
574 if (GROUP_FILTER_SIZE(gsf
->gf_numsrc
) > optlen
) {
579 retv
= ip6_mc_msfilter(sk
, gsf
);
584 case IPV6_ROUTER_ALERT
:
585 retv
= ip6_ra_control(sk
, val
, NULL
);
587 case IPV6_MTU_DISCOVER
:
594 if (val
&& val
< IPV6_MIN_MTU
)
600 np
->recverr
= valbool
;
602 skb_queue_purge(&sk
->sk_error_queue
);
605 case IPV6_FLOWINFO_SEND
:
606 np
->sndflow
= valbool
;
609 case IPV6_FLOWLABEL_MGR
:
610 retv
= ipv6_flowlabel_opt(sk
, optval
, optlen
);
612 case IPV6_IPSEC_POLICY
:
613 case IPV6_XFRM_POLICY
:
615 if (!capable(CAP_NET_ADMIN
))
617 retv
= xfrm_user_policy(sk
, optname
, optval
, optlen
);
630 int ipv6_setsockopt(struct sock
*sk
, int level
, int optname
,
631 char __user
*optval
, int optlen
)
635 if (level
== SOL_IP
&& sk
->sk_type
!= SOCK_RAW
)
636 return udp_prot
.setsockopt(sk
, level
, optname
, optval
, optlen
);
638 if (level
!= SOL_IPV6
)
641 err
= do_ipv6_setsockopt(sk
, level
, optname
, optval
, optlen
);
642 #ifdef CONFIG_NETFILTER
643 /* we need to exclude all possible ENOPROTOOPTs except default case */
644 if (err
== -ENOPROTOOPT
&& optname
!= IPV6_IPSEC_POLICY
&&
645 optname
!= IPV6_XFRM_POLICY
) {
647 err
= nf_setsockopt(sk
, PF_INET6
, optname
, optval
,
655 EXPORT_SYMBOL(ipv6_setsockopt
);
658 int compat_ipv6_setsockopt(struct sock
*sk
, int level
, int optname
,
659 char __user
*optval
, int optlen
)
663 if (level
== SOL_IP
&& sk
->sk_type
!= SOCK_RAW
) {
664 if (udp_prot
.compat_setsockopt
!= NULL
)
665 return udp_prot
.compat_setsockopt(sk
, level
, optname
,
667 return udp_prot
.setsockopt(sk
, level
, optname
, optval
, optlen
);
670 if (level
!= SOL_IPV6
)
673 err
= do_ipv6_setsockopt(sk
, level
, optname
, optval
, optlen
);
674 #ifdef CONFIG_NETFILTER
675 /* we need to exclude all possible ENOPROTOOPTs except default case */
676 if (err
== -ENOPROTOOPT
&& optname
!= IPV6_IPSEC_POLICY
&&
677 optname
!= IPV6_XFRM_POLICY
) {
679 err
= compat_nf_setsockopt(sk
, PF_INET6
, optname
,
687 EXPORT_SYMBOL(compat_ipv6_setsockopt
);
690 static int ipv6_getsockopt_sticky(struct sock
*sk
, struct ipv6_txoptions
*opt
,
691 int optname
, char __user
*optval
, int len
)
693 struct ipv6_opt_hdr
*hdr
;
702 case IPV6_RTHDRDSTOPTS
:
706 hdr
= (struct ipv6_opt_hdr
*)opt
->srcrt
;
712 return -EINVAL
; /* should not happen */
718 len
= min_t(unsigned int, len
, ipv6_optlen(hdr
));
719 if (copy_to_user(optval
, hdr
, len
))
721 return ipv6_optlen(hdr
);
724 static int do_ipv6_getsockopt(struct sock
*sk
, int level
, int optname
,
725 char __user
*optval
, int __user
*optlen
)
727 struct ipv6_pinfo
*np
= inet6_sk(sk
);
731 if (get_user(len
, optlen
))
735 if (sk
->sk_protocol
!= IPPROTO_UDP
&&
736 sk
->sk_protocol
!= IPPROTO_UDPLITE
&&
737 sk
->sk_protocol
!= IPPROTO_TCP
)
739 if (sk
->sk_state
!= TCP_ESTABLISHED
)
745 struct group_filter gsf
;
748 if (len
< GROUP_FILTER_SIZE(0))
750 if (copy_from_user(&gsf
, optval
, GROUP_FILTER_SIZE(0)))
753 err
= ip6_mc_msfget(sk
, &gsf
,
754 (struct group_filter __user
*)optval
, optlen
);
759 case IPV6_2292PKTOPTIONS
:
764 if (sk
->sk_type
!= SOCK_STREAM
)
767 msg
.msg_control
= optval
;
768 msg
.msg_controllen
= len
;
772 skb
= np
->pktoptions
;
774 atomic_inc(&skb
->users
);
778 int err
= datagram_recv_ctl(sk
, &msg
, skb
);
783 if (np
->rxopt
.bits
.rxinfo
) {
784 struct in6_pktinfo src_info
;
785 src_info
.ipi6_ifindex
= np
->mcast_oif
;
786 ipv6_addr_copy(&src_info
.ipi6_addr
, &np
->daddr
);
787 put_cmsg(&msg
, SOL_IPV6
, IPV6_PKTINFO
, sizeof(src_info
), &src_info
);
789 if (np
->rxopt
.bits
.rxhlim
) {
790 int hlim
= np
->mcast_hops
;
791 put_cmsg(&msg
, SOL_IPV6
, IPV6_HOPLIMIT
, sizeof(hlim
), &hlim
);
793 if (np
->rxopt
.bits
.rxoinfo
) {
794 struct in6_pktinfo src_info
;
795 src_info
.ipi6_ifindex
= np
->mcast_oif
;
796 ipv6_addr_copy(&src_info
.ipi6_addr
, &np
->daddr
);
797 put_cmsg(&msg
, SOL_IPV6
, IPV6_2292PKTINFO
, sizeof(src_info
), &src_info
);
799 if (np
->rxopt
.bits
.rxohlim
) {
800 int hlim
= np
->mcast_hops
;
801 put_cmsg(&msg
, SOL_IPV6
, IPV6_2292HOPLIMIT
, sizeof(hlim
), &hlim
);
804 len
-= msg
.msg_controllen
;
805 return put_user(len
, optlen
);
809 struct dst_entry
*dst
;
812 dst
= sk_dst_get(sk
);
827 case IPV6_RECVPKTINFO
:
828 val
= np
->rxopt
.bits
.rxinfo
;
831 case IPV6_2292PKTINFO
:
832 val
= np
->rxopt
.bits
.rxoinfo
;
835 case IPV6_RECVHOPLIMIT
:
836 val
= np
->rxopt
.bits
.rxhlim
;
839 case IPV6_2292HOPLIMIT
:
840 val
= np
->rxopt
.bits
.rxohlim
;
844 val
= np
->rxopt
.bits
.srcrt
;
848 val
= np
->rxopt
.bits
.osrcrt
;
852 case IPV6_RTHDRDSTOPTS
:
858 len
= ipv6_getsockopt_sticky(sk
, np
->opt
,
859 optname
, optval
, len
);
861 return put_user(len
, optlen
);
864 case IPV6_RECVHOPOPTS
:
865 val
= np
->rxopt
.bits
.hopopts
;
868 case IPV6_2292HOPOPTS
:
869 val
= np
->rxopt
.bits
.ohopopts
;
872 case IPV6_RECVDSTOPTS
:
873 val
= np
->rxopt
.bits
.dstopts
;
876 case IPV6_2292DSTOPTS
:
877 val
= np
->rxopt
.bits
.odstopts
;
886 case IPV6_RECVTCLASS
:
887 val
= np
->rxopt
.bits
.rxtclass
;
891 val
= np
->rxopt
.bits
.rxflow
;
894 case IPV6_UNICAST_HOPS
:
895 case IPV6_MULTICAST_HOPS
:
897 struct dst_entry
*dst
;
899 if (optname
== IPV6_UNICAST_HOPS
)
902 val
= np
->mcast_hops
;
904 dst
= sk_dst_get(sk
);
907 val
= dst_metric(dst
, RTAX_HOPLIMIT
);
909 val
= ipv6_get_hoplimit(dst
->dev
);
913 val
= ipv6_devconf
.hop_limit
;
917 case IPV6_MULTICAST_LOOP
:
921 case IPV6_MULTICAST_IF
:
925 case IPV6_MTU_DISCOVER
:
933 case IPV6_FLOWINFO_SEND
:
940 len
= min_t(unsigned int, sizeof(int), len
);
941 if(put_user(len
, optlen
))
943 if(copy_to_user(optval
,&val
,len
))
948 int ipv6_getsockopt(struct sock
*sk
, int level
, int optname
,
949 char __user
*optval
, int __user
*optlen
)
953 if (level
== SOL_IP
&& sk
->sk_type
!= SOCK_RAW
)
954 return udp_prot
.getsockopt(sk
, level
, optname
, optval
, optlen
);
956 if(level
!= SOL_IPV6
)
959 err
= do_ipv6_getsockopt(sk
, level
, optname
, optval
, optlen
);
960 #ifdef CONFIG_NETFILTER
961 /* we need to exclude all possible ENOPROTOOPTs except default case */
962 if (err
== -ENOPROTOOPT
&& optname
!= IPV6_2292PKTOPTIONS
) {
965 if (get_user(len
, optlen
))
969 err
= nf_getsockopt(sk
, PF_INET6
, optname
, optval
,
973 err
= put_user(len
, optlen
);
979 EXPORT_SYMBOL(ipv6_getsockopt
);
982 int compat_ipv6_getsockopt(struct sock
*sk
, int level
, int optname
,
983 char __user
*optval
, int __user
*optlen
)
987 if (level
== SOL_IP
&& sk
->sk_type
!= SOCK_RAW
) {
988 if (udp_prot
.compat_getsockopt
!= NULL
)
989 return udp_prot
.compat_getsockopt(sk
, level
, optname
,
991 return udp_prot
.getsockopt(sk
, level
, optname
, optval
, optlen
);
994 if (level
!= SOL_IPV6
)
997 err
= do_ipv6_getsockopt(sk
, level
, optname
, optval
, optlen
);
998 #ifdef CONFIG_NETFILTER
999 /* we need to exclude all possible ENOPROTOOPTs except default case */
1000 if (err
== -ENOPROTOOPT
&& optname
!= IPV6_2292PKTOPTIONS
) {
1003 if (get_user(len
, optlen
))
1007 err
= compat_nf_getsockopt(sk
, PF_INET6
,
1008 optname
, optval
, &len
);
1011 err
= put_user(len
, optlen
);
1017 EXPORT_SYMBOL(compat_ipv6_getsockopt
);
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