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/mroute6.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>
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>
54 #include <net/udplite.h>
57 #include <asm/uaccess.h>
59 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly;
61 struct ip6_ra_chain *ip6_ra_chain;
62 DEFINE_RWLOCK(ip6_ra_lock);
64 int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *))
66 struct ip6_ra_chain *ra, *new_ra, **rap;
68 /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
69 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW)
72 new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
74 write_lock_bh(&ip6_ra_lock);
75 for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
78 write_unlock_bh(&ip6_ra_lock);
84 write_unlock_bh(&ip6_ra_lock);
94 write_unlock_bh(&ip6_ra_lock);
99 new_ra->destructor = destructor;
103 write_unlock_bh(&ip6_ra_lock);
107 static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
108 char __user *optval, int optlen)
110 struct ipv6_pinfo *np = inet6_sk(sk);
111 struct net *net = sock_net(sk);
113 int retv = -ENOPROTOOPT;
117 else if (get_user(val, (int __user *) optval))
122 if (ip6_mroute_opt(optname))
123 return ip6_mroute_setsockopt(sk, optname, optval, optlen);
130 if (val == PF_INET) {
131 struct ipv6_txoptions *opt;
132 struct sk_buff *pktopt;
134 if (sk->sk_protocol != IPPROTO_UDP &&
135 sk->sk_protocol != IPPROTO_UDPLITE &&
136 sk->sk_protocol != IPPROTO_TCP)
139 if (sk->sk_state != TCP_ESTABLISHED) {
144 if (ipv6_only_sock(sk) ||
145 !ipv6_addr_v4mapped(&np->daddr)) {
146 retv = -EADDRNOTAVAIL;
150 fl6_free_socklist(sk);
151 ipv6_sock_mc_close(sk);
154 * Sock is moving from IPv6 to IPv4 (sk_prot), so
155 * remove it from the refcnt debug socks count in the
158 sk_refcnt_debug_dec(sk);
160 if (sk->sk_protocol == IPPROTO_TCP) {
161 struct inet_connection_sock *icsk = inet_csk(sk);
163 sock_prot_inuse_add(net, sk->sk_prot, -1);
164 sock_prot_inuse_add(net, &tcp_prot, 1);
166 sk->sk_prot = &tcp_prot;
167 icsk->icsk_af_ops = &ipv4_specific;
168 sk->sk_socket->ops = &inet_stream_ops;
169 sk->sk_family = PF_INET;
170 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
172 struct proto *prot = &udp_prot;
174 if (sk->sk_protocol == IPPROTO_UDPLITE)
175 prot = &udplite_prot;
177 sock_prot_inuse_add(net, sk->sk_prot, -1);
178 sock_prot_inuse_add(net, prot, 1);
181 sk->sk_socket->ops = &inet_dgram_ops;
182 sk->sk_family = PF_INET;
184 opt = xchg(&np->opt, NULL);
186 sock_kfree_s(sk, opt, opt->tot_len);
187 pktopt = xchg(&np->pktoptions, NULL);
191 sk->sk_destruct = inet_sock_destruct;
193 * ... and add it to the refcnt debug socks count
194 * in the new family. -acme
196 sk_refcnt_debug_inc(sk);
197 module_put(THIS_MODULE);
204 if (inet_sk(sk)->num)
206 np->ipv6only = valbool;
210 case IPV6_RECVPKTINFO:
211 np->rxopt.bits.rxinfo = valbool;
215 case IPV6_2292PKTINFO:
216 np->rxopt.bits.rxoinfo = valbool;
220 case IPV6_RECVHOPLIMIT:
221 np->rxopt.bits.rxhlim = valbool;
225 case IPV6_2292HOPLIMIT:
226 np->rxopt.bits.rxohlim = valbool;
231 np->rxopt.bits.srcrt = valbool;
236 np->rxopt.bits.osrcrt = valbool;
240 case IPV6_RECVHOPOPTS:
241 np->rxopt.bits.hopopts = valbool;
245 case IPV6_2292HOPOPTS:
246 np->rxopt.bits.ohopopts = valbool;
250 case IPV6_RECVDSTOPTS:
251 np->rxopt.bits.dstopts = valbool;
255 case IPV6_2292DSTOPTS:
256 np->rxopt.bits.odstopts = valbool;
261 if (val < -1 || val > 0xff)
267 case IPV6_RECVTCLASS:
268 np->rxopt.bits.rxtclass = valbool;
273 np->rxopt.bits.rxflow = valbool;
278 case IPV6_RTHDRDSTOPTS:
282 struct ipv6_txoptions *opt;
286 /* hop-by-hop / destination options are privileged option */
288 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
292 if (optlen & 0x7 || optlen > 8 * 255)
295 opt = ipv6_renew_options(sk, np->opt, optname,
296 (struct ipv6_opt_hdr __user *)optval,
303 /* routing header option needs extra check */
304 if (optname == IPV6_RTHDR && opt && opt->srcrt) {
305 struct ipv6_rt_hdr *rthdr = opt->srcrt;
306 switch (rthdr->type) {
307 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
308 case IPV6_SRCRT_TYPE_2:
315 if ((rthdr->hdrlen & 1) ||
316 (rthdr->hdrlen >> 1) != rthdr->segments_left)
321 if (inet_sk(sk)->is_icsk) {
323 struct inet_connection_sock *icsk = inet_csk(sk);
324 if (!((1 << sk->sk_state) &
325 (TCPF_LISTEN | TCPF_CLOSE))
326 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
327 icsk->icsk_ext_hdr_len =
328 opt->opt_flen + opt->opt_nflen;
329 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
332 opt = xchg(&np->opt, opt);
335 write_lock(&sk->sk_dst_lock);
336 opt = xchg(&np->opt, opt);
337 write_unlock(&sk->sk_dst_lock);
342 sock_kfree_s(sk, opt, opt->tot_len);
346 case IPV6_2292PKTOPTIONS:
348 struct ipv6_txoptions *opt = NULL;
353 fl.fl6_flowlabel = 0;
354 fl.oif = sk->sk_bound_dev_if;
359 /* 1K is probably excessive
360 * 1K is surely not enough, 2K per standard header is 16K.
363 if (optlen > 64*1024)
366 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
371 memset(opt, 0, sizeof(*opt));
372 opt->tot_len = sizeof(*opt) + optlen;
374 if (copy_from_user(opt+1, optval, optlen))
377 msg.msg_controllen = optlen;
378 msg.msg_control = (void*)(opt+1);
380 retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk);
385 if (inet_sk(sk)->is_icsk) {
387 struct inet_connection_sock *icsk = inet_csk(sk);
388 if (!((1 << sk->sk_state) &
389 (TCPF_LISTEN | TCPF_CLOSE))
390 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
391 icsk->icsk_ext_hdr_len =
392 opt->opt_flen + opt->opt_nflen;
393 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
396 opt = xchg(&np->opt, opt);
399 write_lock(&sk->sk_dst_lock);
400 opt = xchg(&np->opt, opt);
401 write_unlock(&sk->sk_dst_lock);
407 sock_kfree_s(sk, opt, opt->tot_len);
410 case IPV6_UNICAST_HOPS:
411 if (val > 255 || val < -1)
417 case IPV6_MULTICAST_HOPS:
418 if (sk->sk_type == SOCK_STREAM)
420 if (val > 255 || val < -1)
422 np->mcast_hops = val;
426 case IPV6_MULTICAST_LOOP:
427 np->mc_loop = valbool;
431 case IPV6_MULTICAST_IF:
432 if (sk->sk_type == SOCK_STREAM)
436 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
439 if (__dev_get_by_index(net, val) == NULL) {
447 case IPV6_ADD_MEMBERSHIP:
448 case IPV6_DROP_MEMBERSHIP:
450 struct ipv6_mreq mreq;
453 if (inet_sk(sk)->is_icsk)
457 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
460 if (optname == IPV6_ADD_MEMBERSHIP)
461 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
463 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
466 case IPV6_JOIN_ANYCAST:
467 case IPV6_LEAVE_ANYCAST:
469 struct ipv6_mreq mreq;
471 if (optlen != sizeof(struct ipv6_mreq))
475 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
478 if (optname == IPV6_JOIN_ANYCAST)
479 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
481 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
484 case MCAST_JOIN_GROUP:
485 case MCAST_LEAVE_GROUP:
487 struct group_req greq;
488 struct sockaddr_in6 *psin6;
491 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
493 if (greq.gr_group.ss_family != AF_INET6) {
494 retv = -EADDRNOTAVAIL;
497 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
498 if (optname == MCAST_JOIN_GROUP)
499 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
502 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
506 case MCAST_JOIN_SOURCE_GROUP:
507 case MCAST_LEAVE_SOURCE_GROUP:
508 case MCAST_BLOCK_SOURCE:
509 case MCAST_UNBLOCK_SOURCE:
511 struct group_source_req greqs;
514 if (optlen != sizeof(struct group_source_req))
516 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
520 if (greqs.gsr_group.ss_family != AF_INET6 ||
521 greqs.gsr_source.ss_family != AF_INET6) {
522 retv = -EADDRNOTAVAIL;
525 if (optname == MCAST_BLOCK_SOURCE) {
526 omode = MCAST_EXCLUDE;
528 } else if (optname == MCAST_UNBLOCK_SOURCE) {
529 omode = MCAST_EXCLUDE;
531 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
532 struct sockaddr_in6 *psin6;
534 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
535 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
537 /* prior join w/ different source is ok */
538 if (retv && retv != -EADDRINUSE)
540 omode = MCAST_INCLUDE;
542 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
543 omode = MCAST_INCLUDE;
546 retv = ip6_mc_source(add, omode, sk, &greqs);
551 extern int sysctl_mld_max_msf;
552 struct group_filter *gsf;
554 if (optlen < GROUP_FILTER_SIZE(0))
556 if (optlen > sysctl_optmem_max) {
560 gsf = kmalloc(optlen,GFP_KERNEL);
566 if (copy_from_user(gsf, optval, optlen)) {
570 /* numsrc >= (4G-140)/128 overflow in 32 bits */
571 if (gsf->gf_numsrc >= 0x1ffffffU ||
572 gsf->gf_numsrc > sysctl_mld_max_msf) {
577 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
582 retv = ip6_mc_msfilter(sk, gsf);
587 case IPV6_ROUTER_ALERT:
588 retv = ip6_ra_control(sk, val, NULL);
590 case IPV6_MTU_DISCOVER:
597 if (val && val < IPV6_MIN_MTU)
603 np->recverr = valbool;
605 skb_queue_purge(&sk->sk_error_queue);
608 case IPV6_FLOWINFO_SEND:
609 np->sndflow = valbool;
612 case IPV6_FLOWLABEL_MGR:
613 retv = ipv6_flowlabel_opt(sk, optval, optlen);
615 case IPV6_IPSEC_POLICY:
616 case IPV6_XFRM_POLICY:
618 if (!capable(CAP_NET_ADMIN))
620 retv = xfrm_user_policy(sk, optname, optval, optlen);
623 case IPV6_ADDR_PREFERENCES:
625 unsigned int pref = 0;
626 unsigned int prefmask = ~0;
630 /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */
631 switch (val & (IPV6_PREFER_SRC_PUBLIC|
633 IPV6_PREFER_SRC_PUBTMP_DEFAULT)) {
634 case IPV6_PREFER_SRC_PUBLIC:
635 pref |= IPV6_PREFER_SRC_PUBLIC;
637 case IPV6_PREFER_SRC_TMP:
638 pref |= IPV6_PREFER_SRC_TMP;
640 case IPV6_PREFER_SRC_PUBTMP_DEFAULT:
643 goto pref_skip_pubtmp;
648 prefmask &= ~(IPV6_PREFER_SRC_PUBLIC|
649 IPV6_PREFER_SRC_TMP);
652 /* check HOME/COA conflicts */
653 switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) {
654 case IPV6_PREFER_SRC_HOME:
656 case IPV6_PREFER_SRC_COA:
657 pref |= IPV6_PREFER_SRC_COA;
664 prefmask &= ~IPV6_PREFER_SRC_COA;
667 /* check CGA/NONCGA conflicts */
668 switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) {
669 case IPV6_PREFER_SRC_CGA:
670 case IPV6_PREFER_SRC_NONCGA:
677 np->srcprefs = (np->srcprefs & prefmask) | pref;
693 int ipv6_setsockopt(struct sock *sk, int level, int optname,
694 char __user *optval, int optlen)
698 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
699 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
701 if (level != SOL_IPV6)
704 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
705 #ifdef CONFIG_NETFILTER
706 /* we need to exclude all possible ENOPROTOOPTs except default case */
707 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
708 optname != IPV6_XFRM_POLICY) {
710 err = nf_setsockopt(sk, PF_INET6, optname, optval,
718 EXPORT_SYMBOL(ipv6_setsockopt);
721 int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
722 char __user *optval, int optlen)
726 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
727 if (udp_prot.compat_setsockopt != NULL)
728 return udp_prot.compat_setsockopt(sk, level, optname,
730 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
733 if (level != SOL_IPV6)
736 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
737 #ifdef CONFIG_NETFILTER
738 /* we need to exclude all possible ENOPROTOOPTs except default case */
739 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
740 optname != IPV6_XFRM_POLICY) {
742 err = compat_nf_setsockopt(sk, PF_INET6, optname,
750 EXPORT_SYMBOL(compat_ipv6_setsockopt);
753 static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
754 int optname, char __user *optval, int len)
756 struct ipv6_opt_hdr *hdr;
765 case IPV6_RTHDRDSTOPTS:
769 hdr = (struct ipv6_opt_hdr *)opt->srcrt;
775 return -EINVAL; /* should not happen */
781 len = min_t(unsigned int, len, ipv6_optlen(hdr));
782 if (copy_to_user(optval, hdr, len))
784 return ipv6_optlen(hdr);
787 static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
788 char __user *optval, int __user *optlen)
790 struct ipv6_pinfo *np = inet6_sk(sk);
794 if (ip6_mroute_opt(optname))
795 return ip6_mroute_getsockopt(sk, optname, optval, optlen);
797 if (get_user(len, optlen))
801 if (sk->sk_protocol != IPPROTO_UDP &&
802 sk->sk_protocol != IPPROTO_UDPLITE &&
803 sk->sk_protocol != IPPROTO_TCP)
805 if (sk->sk_state != TCP_ESTABLISHED)
811 struct group_filter gsf;
814 if (len < GROUP_FILTER_SIZE(0))
816 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
819 err = ip6_mc_msfget(sk, &gsf,
820 (struct group_filter __user *)optval, optlen);
825 case IPV6_2292PKTOPTIONS:
830 if (sk->sk_type != SOCK_STREAM)
833 msg.msg_control = optval;
834 msg.msg_controllen = len;
838 skb = np->pktoptions;
840 atomic_inc(&skb->users);
844 int err = datagram_recv_ctl(sk, &msg, skb);
849 if (np->rxopt.bits.rxinfo) {
850 struct in6_pktinfo src_info;
851 src_info.ipi6_ifindex = np->mcast_oif;
852 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
853 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
855 if (np->rxopt.bits.rxhlim) {
856 int hlim = np->mcast_hops;
857 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
859 if (np->rxopt.bits.rxoinfo) {
860 struct in6_pktinfo src_info;
861 src_info.ipi6_ifindex = np->mcast_oif;
862 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
863 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
865 if (np->rxopt.bits.rxohlim) {
866 int hlim = np->mcast_hops;
867 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
870 len -= msg.msg_controllen;
871 return put_user(len, optlen);
875 struct dst_entry *dst;
878 dst = sk_dst_get(sk);
893 case IPV6_RECVPKTINFO:
894 val = np->rxopt.bits.rxinfo;
897 case IPV6_2292PKTINFO:
898 val = np->rxopt.bits.rxoinfo;
901 case IPV6_RECVHOPLIMIT:
902 val = np->rxopt.bits.rxhlim;
905 case IPV6_2292HOPLIMIT:
906 val = np->rxopt.bits.rxohlim;
910 val = np->rxopt.bits.srcrt;
914 val = np->rxopt.bits.osrcrt;
918 case IPV6_RTHDRDSTOPTS:
924 len = ipv6_getsockopt_sticky(sk, np->opt,
925 optname, optval, len);
927 return put_user(len, optlen);
930 case IPV6_RECVHOPOPTS:
931 val = np->rxopt.bits.hopopts;
934 case IPV6_2292HOPOPTS:
935 val = np->rxopt.bits.ohopopts;
938 case IPV6_RECVDSTOPTS:
939 val = np->rxopt.bits.dstopts;
942 case IPV6_2292DSTOPTS:
943 val = np->rxopt.bits.odstopts;
952 case IPV6_RECVTCLASS:
953 val = np->rxopt.bits.rxtclass;
957 val = np->rxopt.bits.rxflow;
960 case IPV6_UNICAST_HOPS:
961 case IPV6_MULTICAST_HOPS:
963 struct dst_entry *dst;
965 if (optname == IPV6_UNICAST_HOPS)
968 val = np->mcast_hops;
970 dst = sk_dst_get(sk);
973 val = ip6_dst_hoplimit(dst);
977 val = ipv6_devconf.hop_limit;
981 case IPV6_MULTICAST_LOOP:
985 case IPV6_MULTICAST_IF:
989 case IPV6_MTU_DISCOVER:
997 case IPV6_FLOWINFO_SEND:
1001 case IPV6_ADDR_PREFERENCES:
1004 if (np->srcprefs & IPV6_PREFER_SRC_TMP)
1005 val |= IPV6_PREFER_SRC_TMP;
1006 else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC)
1007 val |= IPV6_PREFER_SRC_PUBLIC;
1009 /* XXX: should we return system default? */
1010 val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT;
1013 if (np->srcprefs & IPV6_PREFER_SRC_COA)
1014 val |= IPV6_PREFER_SRC_COA;
1016 val |= IPV6_PREFER_SRC_HOME;
1020 return -ENOPROTOOPT;
1022 len = min_t(unsigned int, sizeof(int), len);
1023 if(put_user(len, optlen))
1025 if(copy_to_user(optval,&val,len))
1030 int ipv6_getsockopt(struct sock *sk, int level, int optname,
1031 char __user *optval, int __user *optlen)
1035 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
1036 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1038 if(level != SOL_IPV6)
1039 return -ENOPROTOOPT;
1041 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1042 #ifdef CONFIG_NETFILTER
1043 /* we need to exclude all possible ENOPROTOOPTs except default case */
1044 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
1047 if (get_user(len, optlen))
1051 err = nf_getsockopt(sk, PF_INET6, optname, optval,
1055 err = put_user(len, optlen);
1061 EXPORT_SYMBOL(ipv6_getsockopt);
1063 #ifdef CONFIG_COMPAT
1064 int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
1065 char __user *optval, int __user *optlen)
1069 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
1070 if (udp_prot.compat_getsockopt != NULL)
1071 return udp_prot.compat_getsockopt(sk, level, optname,
1073 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1076 if (level != SOL_IPV6)
1077 return -ENOPROTOOPT;
1079 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1080 #ifdef CONFIG_NETFILTER
1081 /* we need to exclude all possible ENOPROTOOPTs except default case */
1082 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
1085 if (get_user(len, optlen))
1089 err = compat_nf_getsockopt(sk, PF_INET6,
1090 optname, optval, &len);
1093 err = put_user(len, optlen);
1099 EXPORT_SYMBOL(compat_ipv6_getsockopt);