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 = sock_net(sk);
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);
158 struct net *net = sock_net(sk);
161 sock_prot_inuse_add(net, sk->sk_prot, -1);
162 sock_prot_inuse_add(net, &tcp_prot, 1);
164 sk->sk_prot = &tcp_prot;
165 icsk->icsk_af_ops = &ipv4_specific;
166 sk->sk_socket->ops = &inet_stream_ops;
167 sk->sk_family = PF_INET;
168 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
170 struct proto *prot = &udp_prot;
171 struct net *net = sock_net(sk);
173 if (sk->sk_protocol == IPPROTO_UDPLITE)
174 prot = &udplite_prot;
176 sock_prot_inuse_add(net, sk->sk_prot, -1);
177 sock_prot_inuse_add(net, prot, 1);
180 sk->sk_socket->ops = &inet_dgram_ops;
181 sk->sk_family = PF_INET;
183 opt = xchg(&np->opt, NULL);
185 sock_kfree_s(sk, opt, opt->tot_len);
186 pktopt = xchg(&np->pktoptions, NULL);
190 sk->sk_destruct = inet_sock_destruct;
192 * ... and add it to the refcnt debug socks count
193 * in the new family. -acme
195 sk_refcnt_debug_inc(sk);
196 module_put(THIS_MODULE);
203 if (inet_sk(sk)->num)
205 np->ipv6only = valbool;
209 case IPV6_RECVPKTINFO:
210 np->rxopt.bits.rxinfo = valbool;
214 case IPV6_2292PKTINFO:
215 np->rxopt.bits.rxoinfo = valbool;
219 case IPV6_RECVHOPLIMIT:
220 np->rxopt.bits.rxhlim = valbool;
224 case IPV6_2292HOPLIMIT:
225 np->rxopt.bits.rxohlim = valbool;
230 np->rxopt.bits.srcrt = valbool;
235 np->rxopt.bits.osrcrt = valbool;
239 case IPV6_RECVHOPOPTS:
240 np->rxopt.bits.hopopts = valbool;
244 case IPV6_2292HOPOPTS:
245 np->rxopt.bits.ohopopts = valbool;
249 case IPV6_RECVDSTOPTS:
250 np->rxopt.bits.dstopts = valbool;
254 case IPV6_2292DSTOPTS:
255 np->rxopt.bits.odstopts = valbool;
260 if (val < -1 || val > 0xff)
266 case IPV6_RECVTCLASS:
267 np->rxopt.bits.rxtclass = valbool;
272 np->rxopt.bits.rxflow = valbool;
277 case IPV6_RTHDRDSTOPTS:
281 struct ipv6_txoptions *opt;
285 /* hop-by-hop / destination options are privileged option */
287 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
291 if (optlen & 0x7 || optlen > 8 * 255)
294 opt = ipv6_renew_options(sk, np->opt, optname,
295 (struct ipv6_opt_hdr __user *)optval,
302 /* routing header option needs extra check */
303 if (optname == IPV6_RTHDR && opt && opt->srcrt) {
304 struct ipv6_rt_hdr *rthdr = opt->srcrt;
305 switch (rthdr->type) {
306 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
307 case IPV6_SRCRT_TYPE_2:
314 if ((rthdr->hdrlen & 1) ||
315 (rthdr->hdrlen >> 1) != rthdr->segments_left)
320 if (inet_sk(sk)->is_icsk) {
322 struct inet_connection_sock *icsk = inet_csk(sk);
323 if (!((1 << sk->sk_state) &
324 (TCPF_LISTEN | TCPF_CLOSE))
325 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
326 icsk->icsk_ext_hdr_len =
327 opt->opt_flen + opt->opt_nflen;
328 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
331 opt = xchg(&np->opt, opt);
334 write_lock(&sk->sk_dst_lock);
335 opt = xchg(&np->opt, opt);
336 write_unlock(&sk->sk_dst_lock);
341 sock_kfree_s(sk, opt, opt->tot_len);
345 case IPV6_2292PKTOPTIONS:
347 struct ipv6_txoptions *opt = NULL;
352 fl.fl6_flowlabel = 0;
353 fl.oif = sk->sk_bound_dev_if;
358 /* 1K is probably excessive
359 * 1K is surely not enough, 2K per standard header is 16K.
362 if (optlen > 64*1024)
365 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
370 memset(opt, 0, sizeof(*opt));
371 opt->tot_len = sizeof(*opt) + optlen;
373 if (copy_from_user(opt+1, optval, optlen))
376 msg.msg_controllen = optlen;
377 msg.msg_control = (void*)(opt+1);
379 retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk);
384 if (inet_sk(sk)->is_icsk) {
386 struct inet_connection_sock *icsk = inet_csk(sk);
387 if (!((1 << sk->sk_state) &
388 (TCPF_LISTEN | TCPF_CLOSE))
389 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
390 icsk->icsk_ext_hdr_len =
391 opt->opt_flen + opt->opt_nflen;
392 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
395 opt = xchg(&np->opt, opt);
398 write_lock(&sk->sk_dst_lock);
399 opt = xchg(&np->opt, opt);
400 write_unlock(&sk->sk_dst_lock);
406 sock_kfree_s(sk, opt, opt->tot_len);
409 case IPV6_UNICAST_HOPS:
410 if (val > 255 || val < -1)
416 case IPV6_MULTICAST_HOPS:
417 if (sk->sk_type == SOCK_STREAM)
419 if (val > 255 || val < -1)
421 np->mcast_hops = val;
425 case IPV6_MULTICAST_LOOP:
426 np->mc_loop = valbool;
430 case IPV6_MULTICAST_IF:
431 if (sk->sk_type == SOCK_STREAM)
435 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
438 if (__dev_get_by_index(net, val) == NULL) {
446 case IPV6_ADD_MEMBERSHIP:
447 case IPV6_DROP_MEMBERSHIP:
449 struct ipv6_mreq mreq;
452 if (inet_sk(sk)->is_icsk)
456 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
459 if (optname == IPV6_ADD_MEMBERSHIP)
460 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
462 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
465 case IPV6_JOIN_ANYCAST:
466 case IPV6_LEAVE_ANYCAST:
468 struct ipv6_mreq mreq;
470 if (optlen != sizeof(struct ipv6_mreq))
474 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
477 if (optname == IPV6_JOIN_ANYCAST)
478 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
480 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
483 case MCAST_JOIN_GROUP:
484 case MCAST_LEAVE_GROUP:
486 struct group_req greq;
487 struct sockaddr_in6 *psin6;
490 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
492 if (greq.gr_group.ss_family != AF_INET6) {
493 retv = -EADDRNOTAVAIL;
496 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
497 if (optname == MCAST_JOIN_GROUP)
498 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
501 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
505 case MCAST_JOIN_SOURCE_GROUP:
506 case MCAST_LEAVE_SOURCE_GROUP:
507 case MCAST_BLOCK_SOURCE:
508 case MCAST_UNBLOCK_SOURCE:
510 struct group_source_req greqs;
513 if (optlen != sizeof(struct group_source_req))
515 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
519 if (greqs.gsr_group.ss_family != AF_INET6 ||
520 greqs.gsr_source.ss_family != AF_INET6) {
521 retv = -EADDRNOTAVAIL;
524 if (optname == MCAST_BLOCK_SOURCE) {
525 omode = MCAST_EXCLUDE;
527 } else if (optname == MCAST_UNBLOCK_SOURCE) {
528 omode = MCAST_EXCLUDE;
530 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
531 struct sockaddr_in6 *psin6;
533 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
534 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
536 /* prior join w/ different source is ok */
537 if (retv && retv != -EADDRINUSE)
539 omode = MCAST_INCLUDE;
541 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
542 omode = MCAST_INCLUDE;
545 retv = ip6_mc_source(add, omode, sk, &greqs);
550 extern int sysctl_mld_max_msf;
551 struct group_filter *gsf;
553 if (optlen < GROUP_FILTER_SIZE(0))
555 if (optlen > sysctl_optmem_max) {
559 gsf = kmalloc(optlen,GFP_KERNEL);
565 if (copy_from_user(gsf, optval, optlen)) {
569 /* numsrc >= (4G-140)/128 overflow in 32 bits */
570 if (gsf->gf_numsrc >= 0x1ffffffU ||
571 gsf->gf_numsrc > sysctl_mld_max_msf) {
576 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
581 retv = ip6_mc_msfilter(sk, gsf);
586 case IPV6_ROUTER_ALERT:
587 retv = ip6_ra_control(sk, val, NULL);
589 case IPV6_MTU_DISCOVER:
596 if (val && val < IPV6_MIN_MTU)
602 np->recverr = valbool;
604 skb_queue_purge(&sk->sk_error_queue);
607 case IPV6_FLOWINFO_SEND:
608 np->sndflow = valbool;
611 case IPV6_FLOWLABEL_MGR:
612 retv = ipv6_flowlabel_opt(sk, optval, optlen);
614 case IPV6_IPSEC_POLICY:
615 case IPV6_XFRM_POLICY:
617 if (!capable(CAP_NET_ADMIN))
619 retv = xfrm_user_policy(sk, optname, optval, optlen);
622 case IPV6_ADDR_PREFERENCES:
624 unsigned int pref = 0;
625 unsigned int prefmask = ~0;
629 /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */
630 switch (val & (IPV6_PREFER_SRC_PUBLIC|
632 IPV6_PREFER_SRC_PUBTMP_DEFAULT)) {
633 case IPV6_PREFER_SRC_PUBLIC:
634 pref |= IPV6_PREFER_SRC_PUBLIC;
636 case IPV6_PREFER_SRC_TMP:
637 pref |= IPV6_PREFER_SRC_TMP;
639 case IPV6_PREFER_SRC_PUBTMP_DEFAULT:
642 goto pref_skip_pubtmp;
647 prefmask &= ~(IPV6_PREFER_SRC_PUBLIC|
648 IPV6_PREFER_SRC_TMP);
651 /* check HOME/COA conflicts */
652 switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) {
653 case IPV6_PREFER_SRC_HOME:
655 case IPV6_PREFER_SRC_COA:
656 pref |= IPV6_PREFER_SRC_COA;
663 prefmask &= ~IPV6_PREFER_SRC_COA;
666 /* check CGA/NONCGA conflicts */
667 switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) {
668 case IPV6_PREFER_SRC_CGA:
669 case IPV6_PREFER_SRC_NONCGA:
676 np->srcprefs = (np->srcprefs & prefmask) | pref;
692 int ipv6_setsockopt(struct sock *sk, int level, int optname,
693 char __user *optval, int optlen)
697 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
698 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
700 if (level != SOL_IPV6)
703 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
704 #ifdef CONFIG_NETFILTER
705 /* we need to exclude all possible ENOPROTOOPTs except default case */
706 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
707 optname != IPV6_XFRM_POLICY) {
709 err = nf_setsockopt(sk, PF_INET6, optname, optval,
717 EXPORT_SYMBOL(ipv6_setsockopt);
720 int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
721 char __user *optval, int optlen)
725 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
726 if (udp_prot.compat_setsockopt != NULL)
727 return udp_prot.compat_setsockopt(sk, level, optname,
729 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
732 if (level != SOL_IPV6)
735 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
736 #ifdef CONFIG_NETFILTER
737 /* we need to exclude all possible ENOPROTOOPTs except default case */
738 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
739 optname != IPV6_XFRM_POLICY) {
741 err = compat_nf_setsockopt(sk, PF_INET6, optname,
749 EXPORT_SYMBOL(compat_ipv6_setsockopt);
752 static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
753 int optname, char __user *optval, int len)
755 struct ipv6_opt_hdr *hdr;
764 case IPV6_RTHDRDSTOPTS:
768 hdr = (struct ipv6_opt_hdr *)opt->srcrt;
774 return -EINVAL; /* should not happen */
780 len = min_t(unsigned int, len, ipv6_optlen(hdr));
781 if (copy_to_user(optval, hdr, len))
783 return ipv6_optlen(hdr);
786 static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
787 char __user *optval, int __user *optlen)
789 struct ipv6_pinfo *np = inet6_sk(sk);
793 if (get_user(len, optlen))
797 if (sk->sk_protocol != IPPROTO_UDP &&
798 sk->sk_protocol != IPPROTO_UDPLITE &&
799 sk->sk_protocol != IPPROTO_TCP)
801 if (sk->sk_state != TCP_ESTABLISHED)
807 struct group_filter gsf;
810 if (len < GROUP_FILTER_SIZE(0))
812 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
815 err = ip6_mc_msfget(sk, &gsf,
816 (struct group_filter __user *)optval, optlen);
821 case IPV6_2292PKTOPTIONS:
826 if (sk->sk_type != SOCK_STREAM)
829 msg.msg_control = optval;
830 msg.msg_controllen = len;
834 skb = np->pktoptions;
836 atomic_inc(&skb->users);
840 int err = datagram_recv_ctl(sk, &msg, skb);
845 if (np->rxopt.bits.rxinfo) {
846 struct in6_pktinfo src_info;
847 src_info.ipi6_ifindex = np->mcast_oif;
848 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
849 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
851 if (np->rxopt.bits.rxhlim) {
852 int hlim = np->mcast_hops;
853 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
855 if (np->rxopt.bits.rxoinfo) {
856 struct in6_pktinfo src_info;
857 src_info.ipi6_ifindex = np->mcast_oif;
858 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
859 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
861 if (np->rxopt.bits.rxohlim) {
862 int hlim = np->mcast_hops;
863 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
866 len -= msg.msg_controllen;
867 return put_user(len, optlen);
871 struct dst_entry *dst;
874 dst = sk_dst_get(sk);
889 case IPV6_RECVPKTINFO:
890 val = np->rxopt.bits.rxinfo;
893 case IPV6_2292PKTINFO:
894 val = np->rxopt.bits.rxoinfo;
897 case IPV6_RECVHOPLIMIT:
898 val = np->rxopt.bits.rxhlim;
901 case IPV6_2292HOPLIMIT:
902 val = np->rxopt.bits.rxohlim;
906 val = np->rxopt.bits.srcrt;
910 val = np->rxopt.bits.osrcrt;
914 case IPV6_RTHDRDSTOPTS:
920 len = ipv6_getsockopt_sticky(sk, np->opt,
921 optname, optval, len);
923 return put_user(len, optlen);
926 case IPV6_RECVHOPOPTS:
927 val = np->rxopt.bits.hopopts;
930 case IPV6_2292HOPOPTS:
931 val = np->rxopt.bits.ohopopts;
934 case IPV6_RECVDSTOPTS:
935 val = np->rxopt.bits.dstopts;
938 case IPV6_2292DSTOPTS:
939 val = np->rxopt.bits.odstopts;
948 case IPV6_RECVTCLASS:
949 val = np->rxopt.bits.rxtclass;
953 val = np->rxopt.bits.rxflow;
956 case IPV6_UNICAST_HOPS:
957 case IPV6_MULTICAST_HOPS:
959 struct dst_entry *dst;
961 if (optname == IPV6_UNICAST_HOPS)
964 val = np->mcast_hops;
966 dst = sk_dst_get(sk);
969 val = ip6_dst_hoplimit(dst);
973 val = ipv6_devconf.hop_limit;
977 case IPV6_MULTICAST_LOOP:
981 case IPV6_MULTICAST_IF:
985 case IPV6_MTU_DISCOVER:
993 case IPV6_FLOWINFO_SEND:
997 case IPV6_ADDR_PREFERENCES:
1000 if (np->srcprefs & IPV6_PREFER_SRC_TMP)
1001 val |= IPV6_PREFER_SRC_TMP;
1002 else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC)
1003 val |= IPV6_PREFER_SRC_PUBLIC;
1005 /* XXX: should we return system default? */
1006 val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT;
1009 if (np->srcprefs & IPV6_PREFER_SRC_COA)
1010 val |= IPV6_PREFER_SRC_COA;
1012 val |= IPV6_PREFER_SRC_HOME;
1016 return -ENOPROTOOPT;
1018 len = min_t(unsigned int, sizeof(int), len);
1019 if(put_user(len, optlen))
1021 if(copy_to_user(optval,&val,len))
1026 int ipv6_getsockopt(struct sock *sk, int level, int optname,
1027 char __user *optval, int __user *optlen)
1031 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
1032 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1034 if(level != SOL_IPV6)
1035 return -ENOPROTOOPT;
1037 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1038 #ifdef CONFIG_NETFILTER
1039 /* we need to exclude all possible ENOPROTOOPTs except default case */
1040 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
1043 if (get_user(len, optlen))
1047 err = nf_getsockopt(sk, PF_INET6, optname, optval,
1051 err = put_user(len, optlen);
1057 EXPORT_SYMBOL(ipv6_getsockopt);
1059 #ifdef CONFIG_COMPAT
1060 int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
1061 char __user *optval, int __user *optlen)
1065 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
1066 if (udp_prot.compat_getsockopt != NULL)
1067 return udp_prot.compat_getsockopt(sk, level, optname,
1069 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1072 if (level != SOL_IPV6)
1073 return -ENOPROTOOPT;
1075 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1076 #ifdef CONFIG_NETFILTER
1077 /* we need to exclude all possible ENOPROTOOPTs except default case */
1078 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
1081 if (get_user(len, optlen))
1085 err = compat_nf_getsockopt(sk, PF_INET6,
1086 optname, optval, &len);
1089 err = put_user(len, optlen);
1095 EXPORT_SYMBOL(compat_ipv6_getsockopt);