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/sched.h>
35 #include <linux/net.h>
36 #include <linux/in6.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 static struct inet6_protocol *ipv6_gso_pull_exthdrs(struct sk_buff *skb,
64 struct inet6_protocol *ops = NULL;
67 struct ipv6_opt_hdr *opth;
70 if (proto != NEXTHDR_HOP) {
71 ops = rcu_dereference(inet6_protos[proto]);
76 if (!(ops->flags & INET6_PROTO_GSO_EXTHDR))
80 if (unlikely(!pskb_may_pull(skb, 8)))
83 opth = (void *)skb->data;
84 len = opth->hdrlen * 8 + 8;
86 if (unlikely(!pskb_may_pull(skb, len)))
89 proto = opth->nexthdr;
96 static int ipv6_gso_send_check(struct sk_buff *skb)
98 struct ipv6hdr *ipv6h;
99 struct inet6_protocol *ops;
102 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
105 ipv6h = skb->nh.ipv6h;
106 __skb_pull(skb, sizeof(*ipv6h));
107 err = -EPROTONOSUPPORT;
110 ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
111 if (likely(ops && ops->gso_send_check)) {
112 skb->h.raw = skb->data;
113 err = ops->gso_send_check(skb);
121 static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features)
123 struct sk_buff *segs = ERR_PTR(-EINVAL);
124 struct ipv6hdr *ipv6h;
125 struct inet6_protocol *ops;
127 if (!(features & NETIF_F_HW_CSUM))
128 features &= ~NETIF_F_SG;
130 if (unlikely(skb_shinfo(skb)->gso_type &
138 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
141 ipv6h = skb->nh.ipv6h;
142 __skb_pull(skb, sizeof(*ipv6h));
143 segs = ERR_PTR(-EPROTONOSUPPORT);
146 ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
147 if (likely(ops && ops->gso_segment)) {
148 skb->h.raw = skb->data;
149 segs = ops->gso_segment(skb, features);
153 if (unlikely(IS_ERR(segs)))
156 for (skb = segs; skb; skb = skb->next) {
157 ipv6h = skb->nh.ipv6h;
158 ipv6h->payload_len = htons(skb->len - skb->mac_len -
166 static struct packet_type ipv6_packet_type = {
167 .type = __constant_htons(ETH_P_IPV6),
169 .gso_send_check = ipv6_gso_send_check,
170 .gso_segment = ipv6_gso_segment,
173 struct ip6_ra_chain *ip6_ra_chain;
174 DEFINE_RWLOCK(ip6_ra_lock);
176 int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *))
178 struct ip6_ra_chain *ra, *new_ra, **rap;
180 /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
181 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW)
184 new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
186 write_lock_bh(&ip6_ra_lock);
187 for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
190 write_unlock_bh(&ip6_ra_lock);
196 write_unlock_bh(&ip6_ra_lock);
205 if (new_ra == NULL) {
206 write_unlock_bh(&ip6_ra_lock);
211 new_ra->destructor = destructor;
215 write_unlock_bh(&ip6_ra_lock);
219 static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
220 char __user *optval, int optlen)
222 struct ipv6_pinfo *np = inet6_sk(sk);
224 int retv = -ENOPROTOOPT;
228 else if (get_user(val, (int __user *) optval))
238 if (val == PF_INET) {
239 struct ipv6_txoptions *opt;
240 struct sk_buff *pktopt;
242 if (sk->sk_protocol != IPPROTO_UDP &&
243 sk->sk_protocol != IPPROTO_UDPLITE &&
244 sk->sk_protocol != IPPROTO_TCP)
247 if (sk->sk_state != TCP_ESTABLISHED) {
252 if (ipv6_only_sock(sk) ||
253 !(ipv6_addr_type(&np->daddr) & IPV6_ADDR_MAPPED)) {
254 retv = -EADDRNOTAVAIL;
258 fl6_free_socklist(sk);
259 ipv6_sock_mc_close(sk);
262 * Sock is moving from IPv6 to IPv4 (sk_prot), so
263 * remove it from the refcnt debug socks count in the
266 sk_refcnt_debug_dec(sk);
268 if (sk->sk_protocol == IPPROTO_TCP) {
269 struct inet_connection_sock *icsk = inet_csk(sk);
272 sock_prot_dec_use(sk->sk_prot);
273 sock_prot_inc_use(&tcp_prot);
275 sk->sk_prot = &tcp_prot;
276 icsk->icsk_af_ops = &ipv4_specific;
277 sk->sk_socket->ops = &inet_stream_ops;
278 sk->sk_family = PF_INET;
279 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
281 struct proto *prot = &udp_prot;
283 if (sk->sk_protocol == IPPROTO_UDPLITE)
284 prot = &udplite_prot;
286 sock_prot_dec_use(sk->sk_prot);
287 sock_prot_inc_use(prot);
290 sk->sk_socket->ops = &inet_dgram_ops;
291 sk->sk_family = PF_INET;
293 opt = xchg(&np->opt, NULL);
295 sock_kfree_s(sk, opt, opt->tot_len);
296 pktopt = xchg(&np->pktoptions, NULL);
300 sk->sk_destruct = inet_sock_destruct;
302 * ... and add it to the refcnt debug socks count
303 * in the new family. -acme
305 sk_refcnt_debug_inc(sk);
306 module_put(THIS_MODULE);
313 if (inet_sk(sk)->num)
315 np->ipv6only = valbool;
319 case IPV6_RECVPKTINFO:
320 np->rxopt.bits.rxinfo = valbool;
324 case IPV6_2292PKTINFO:
325 np->rxopt.bits.rxoinfo = valbool;
329 case IPV6_RECVHOPLIMIT:
330 np->rxopt.bits.rxhlim = valbool;
334 case IPV6_2292HOPLIMIT:
335 np->rxopt.bits.rxohlim = valbool;
340 if (val < 0 || val > 2)
342 np->rxopt.bits.srcrt = val;
347 if (val < 0 || val > 2)
349 np->rxopt.bits.osrcrt = val;
353 case IPV6_RECVHOPOPTS:
354 np->rxopt.bits.hopopts = valbool;
358 case IPV6_2292HOPOPTS:
359 np->rxopt.bits.ohopopts = valbool;
363 case IPV6_RECVDSTOPTS:
364 np->rxopt.bits.dstopts = valbool;
368 case IPV6_2292DSTOPTS:
369 np->rxopt.bits.odstopts = valbool;
374 if (val < -1 || val > 0xff)
380 case IPV6_RECVTCLASS:
381 np->rxopt.bits.rxtclass = valbool;
386 np->rxopt.bits.rxflow = valbool;
391 case IPV6_RTHDRDSTOPTS:
395 struct ipv6_txoptions *opt;
399 /* hop-by-hop / destination options are privileged option */
401 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
405 if (optlen & 0x7 || optlen > 8 * 255)
408 opt = ipv6_renew_options(sk, np->opt, optname,
409 (struct ipv6_opt_hdr __user *)optval,
416 /* routing header option needs extra check */
417 if (optname == IPV6_RTHDR && opt->srcrt) {
418 struct ipv6_rt_hdr *rthdr = opt->srcrt;
419 switch (rthdr->type) {
420 case IPV6_SRCRT_TYPE_0:
421 #ifdef CONFIG_IPV6_MIP6
422 case IPV6_SRCRT_TYPE_2:
429 if ((rthdr->hdrlen & 1) ||
430 (rthdr->hdrlen >> 1) != rthdr->segments_left)
435 if (inet_sk(sk)->is_icsk) {
437 struct inet_connection_sock *icsk = inet_csk(sk);
438 if (!((1 << sk->sk_state) &
439 (TCPF_LISTEN | TCPF_CLOSE))
440 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
441 icsk->icsk_ext_hdr_len =
442 opt->opt_flen + opt->opt_nflen;
443 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
446 opt = xchg(&np->opt, opt);
449 write_lock(&sk->sk_dst_lock);
450 opt = xchg(&np->opt, opt);
451 write_unlock(&sk->sk_dst_lock);
456 sock_kfree_s(sk, opt, opt->tot_len);
460 case IPV6_2292PKTOPTIONS:
462 struct ipv6_txoptions *opt = NULL;
467 fl.fl6_flowlabel = 0;
468 fl.oif = sk->sk_bound_dev_if;
473 /* 1K is probably excessive
474 * 1K is surely not enough, 2K per standard header is 16K.
477 if (optlen > 64*1024)
480 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
485 memset(opt, 0, sizeof(*opt));
486 opt->tot_len = sizeof(*opt) + optlen;
488 if (copy_from_user(opt+1, optval, optlen))
491 msg.msg_controllen = optlen;
492 msg.msg_control = (void*)(opt+1);
494 retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk);
499 if (inet_sk(sk)->is_icsk) {
501 struct inet_connection_sock *icsk = inet_csk(sk);
502 if (!((1 << sk->sk_state) &
503 (TCPF_LISTEN | TCPF_CLOSE))
504 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
505 icsk->icsk_ext_hdr_len =
506 opt->opt_flen + opt->opt_nflen;
507 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
510 opt = xchg(&np->opt, opt);
513 write_lock(&sk->sk_dst_lock);
514 opt = xchg(&np->opt, opt);
515 write_unlock(&sk->sk_dst_lock);
521 sock_kfree_s(sk, opt, opt->tot_len);
524 case IPV6_UNICAST_HOPS:
525 if (val > 255 || val < -1)
531 case IPV6_MULTICAST_HOPS:
532 if (sk->sk_type == SOCK_STREAM)
534 if (val > 255 || val < -1)
536 np->mcast_hops = val;
540 case IPV6_MULTICAST_LOOP:
541 np->mc_loop = valbool;
545 case IPV6_MULTICAST_IF:
546 if (sk->sk_type == SOCK_STREAM)
548 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
551 if (__dev_get_by_index(val) == NULL) {
558 case IPV6_ADD_MEMBERSHIP:
559 case IPV6_DROP_MEMBERSHIP:
561 struct ipv6_mreq mreq;
564 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
567 if (optname == IPV6_ADD_MEMBERSHIP)
568 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
570 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
573 case IPV6_JOIN_ANYCAST:
574 case IPV6_LEAVE_ANYCAST:
576 struct ipv6_mreq mreq;
578 if (optlen != sizeof(struct ipv6_mreq))
582 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
585 if (optname == IPV6_JOIN_ANYCAST)
586 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
588 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
591 case MCAST_JOIN_GROUP:
592 case MCAST_LEAVE_GROUP:
594 struct group_req greq;
595 struct sockaddr_in6 *psin6;
598 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
600 if (greq.gr_group.ss_family != AF_INET6) {
601 retv = -EADDRNOTAVAIL;
604 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
605 if (optname == MCAST_JOIN_GROUP)
606 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
609 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
613 case MCAST_JOIN_SOURCE_GROUP:
614 case MCAST_LEAVE_SOURCE_GROUP:
615 case MCAST_BLOCK_SOURCE:
616 case MCAST_UNBLOCK_SOURCE:
618 struct group_source_req greqs;
621 if (optlen != sizeof(struct group_source_req))
623 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
627 if (greqs.gsr_group.ss_family != AF_INET6 ||
628 greqs.gsr_source.ss_family != AF_INET6) {
629 retv = -EADDRNOTAVAIL;
632 if (optname == MCAST_BLOCK_SOURCE) {
633 omode = MCAST_EXCLUDE;
635 } else if (optname == MCAST_UNBLOCK_SOURCE) {
636 omode = MCAST_EXCLUDE;
638 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
639 struct sockaddr_in6 *psin6;
641 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
642 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
644 /* prior join w/ different source is ok */
645 if (retv && retv != -EADDRINUSE)
647 omode = MCAST_INCLUDE;
649 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
650 omode = MCAST_INCLUDE;
653 retv = ip6_mc_source(add, omode, sk, &greqs);
658 extern int sysctl_mld_max_msf;
659 struct group_filter *gsf;
661 if (optlen < GROUP_FILTER_SIZE(0))
663 if (optlen > sysctl_optmem_max) {
667 gsf = kmalloc(optlen,GFP_KERNEL);
673 if (copy_from_user(gsf, optval, optlen)) {
677 /* numsrc >= (4G-140)/128 overflow in 32 bits */
678 if (gsf->gf_numsrc >= 0x1ffffffU ||
679 gsf->gf_numsrc > sysctl_mld_max_msf) {
684 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
689 retv = ip6_mc_msfilter(sk, gsf);
694 case IPV6_ROUTER_ALERT:
695 retv = ip6_ra_control(sk, val, NULL);
697 case IPV6_MTU_DISCOVER:
704 if (val && val < IPV6_MIN_MTU)
710 np->recverr = valbool;
712 skb_queue_purge(&sk->sk_error_queue);
715 case IPV6_FLOWINFO_SEND:
716 np->sndflow = valbool;
719 case IPV6_FLOWLABEL_MGR:
720 retv = ipv6_flowlabel_opt(sk, optval, optlen);
722 case IPV6_IPSEC_POLICY:
723 case IPV6_XFRM_POLICY:
725 if (!capable(CAP_NET_ADMIN))
727 retv = xfrm_user_policy(sk, optname, optval, optlen);
740 int ipv6_setsockopt(struct sock *sk, int level, int optname,
741 char __user *optval, int optlen)
745 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
746 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
748 if (level != SOL_IPV6)
751 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
752 #ifdef CONFIG_NETFILTER
753 /* we need to exclude all possible ENOPROTOOPTs except default case */
754 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
755 optname != IPV6_XFRM_POLICY) {
757 err = nf_setsockopt(sk, PF_INET6, optname, optval,
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_opt_hdr *hdr,
800 char __user *optval, int len)
804 len = min_t(int, len, ipv6_optlen(hdr));
805 if (copy_to_user(optval, hdr, ipv6_optlen(hdr)))
810 static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
811 char __user *optval, int __user *optlen)
813 struct ipv6_pinfo *np = inet6_sk(sk);
817 if (get_user(len, optlen))
821 if (sk->sk_protocol != IPPROTO_UDP &&
822 sk->sk_protocol != IPPROTO_UDPLITE &&
823 sk->sk_protocol != IPPROTO_TCP)
825 if (sk->sk_state != TCP_ESTABLISHED)
831 struct group_filter gsf;
834 if (len < GROUP_FILTER_SIZE(0))
836 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
839 err = ip6_mc_msfget(sk, &gsf,
840 (struct group_filter __user *)optval, optlen);
845 case IPV6_2292PKTOPTIONS:
850 if (sk->sk_type != SOCK_STREAM)
853 msg.msg_control = optval;
854 msg.msg_controllen = len;
858 skb = np->pktoptions;
860 atomic_inc(&skb->users);
864 int err = datagram_recv_ctl(sk, &msg, skb);
869 if (np->rxopt.bits.rxinfo) {
870 struct in6_pktinfo src_info;
871 src_info.ipi6_ifindex = np->mcast_oif;
872 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
873 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
875 if (np->rxopt.bits.rxhlim) {
876 int hlim = np->mcast_hops;
877 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
879 if (np->rxopt.bits.rxoinfo) {
880 struct in6_pktinfo src_info;
881 src_info.ipi6_ifindex = np->mcast_oif;
882 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
883 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
885 if (np->rxopt.bits.rxohlim) {
886 int hlim = np->mcast_hops;
887 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
890 len -= msg.msg_controllen;
891 return put_user(len, optlen);
895 struct dst_entry *dst;
898 dst = sk_dst_get(sk);
913 case IPV6_RECVPKTINFO:
914 val = np->rxopt.bits.rxinfo;
917 case IPV6_2292PKTINFO:
918 val = np->rxopt.bits.rxoinfo;
921 case IPV6_RECVHOPLIMIT:
922 val = np->rxopt.bits.rxhlim;
925 case IPV6_2292HOPLIMIT:
926 val = np->rxopt.bits.rxohlim;
930 val = np->rxopt.bits.srcrt;
934 val = np->rxopt.bits.osrcrt;
938 case IPV6_RTHDRDSTOPTS:
944 len = ipv6_getsockopt_sticky(sk, np->opt->hopopt,
947 return put_user(len, optlen);
950 case IPV6_RECVHOPOPTS:
951 val = np->rxopt.bits.hopopts;
954 case IPV6_2292HOPOPTS:
955 val = np->rxopt.bits.ohopopts;
958 case IPV6_RECVDSTOPTS:
959 val = np->rxopt.bits.dstopts;
962 case IPV6_2292DSTOPTS:
963 val = np->rxopt.bits.odstopts;
972 case IPV6_RECVTCLASS:
973 val = np->rxopt.bits.rxtclass;
977 val = np->rxopt.bits.rxflow;
980 case IPV6_UNICAST_HOPS:
984 case IPV6_MULTICAST_HOPS:
985 val = np->mcast_hops;
988 case IPV6_MULTICAST_LOOP:
992 case IPV6_MULTICAST_IF:
996 case IPV6_MTU_DISCOVER:
1004 case IPV6_FLOWINFO_SEND:
1011 len = min_t(unsigned int, sizeof(int), len);
1012 if(put_user(len, optlen))
1014 if(copy_to_user(optval,&val,len))
1019 int ipv6_getsockopt(struct sock *sk, int level, int optname,
1020 char __user *optval, int __user *optlen)
1024 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
1025 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1027 if(level != SOL_IPV6)
1028 return -ENOPROTOOPT;
1030 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1031 #ifdef CONFIG_NETFILTER
1032 /* we need to exclude all possible EINVALs except default case */
1033 if (err == -EINVAL && optname != IPV6_ADDRFORM &&
1034 optname != MCAST_MSFILTER) {
1037 if (get_user(len, optlen))
1041 err = nf_getsockopt(sk, PF_INET6, optname, optval,
1045 err = put_user(len, optlen);
1051 #ifdef CONFIG_COMPAT
1052 int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
1053 char __user *optval, int __user *optlen)
1057 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
1058 if (udp_prot.compat_getsockopt != NULL)
1059 return udp_prot.compat_getsockopt(sk, level, optname,
1061 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1064 if (level != SOL_IPV6)
1065 return -ENOPROTOOPT;
1067 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1068 #ifdef CONFIG_NETFILTER
1069 /* we need to exclude all possible EINVALs except default case */
1070 if (err == -EINVAL && optname != IPV6_ADDRFORM &&
1071 optname != MCAST_MSFILTER) {
1074 if (get_user(len, optlen))
1078 err = compat_nf_getsockopt(sk, PF_INET6,
1079 optname, optval, &len);
1082 err = put_user(len, optlen);
1088 EXPORT_SYMBOL(compat_ipv6_getsockopt);
1091 void __init ipv6_packet_init(void)
1093 dev_add_pack(&ipv6_packet_type);
1096 void ipv6_packet_cleanup(void)
1098 dev_remove_pack(&ipv6_packet_type);