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 static struct inet6_protocol *ipv6_gso_pull_exthdrs(struct sk_buff *skb,
63 struct inet6_protocol *ops = NULL;
66 struct ipv6_opt_hdr *opth;
69 if (proto != NEXTHDR_HOP) {
70 ops = rcu_dereference(inet6_protos[proto]);
75 if (!(ops->flags & INET6_PROTO_GSO_EXTHDR))
79 if (unlikely(!pskb_may_pull(skb, 8)))
82 opth = (void *)skb->data;
83 len = opth->hdrlen * 8 + 8;
85 if (unlikely(!pskb_may_pull(skb, len)))
88 proto = opth->nexthdr;
95 static int ipv6_gso_send_check(struct sk_buff *skb)
97 struct ipv6hdr *ipv6h;
98 struct inet6_protocol *ops;
101 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
104 ipv6h = ipv6_hdr(skb);
105 __skb_pull(skb, sizeof(*ipv6h));
106 err = -EPROTONOSUPPORT;
109 ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
110 if (likely(ops && ops->gso_send_check)) {
111 skb_reset_transport_header(skb);
112 err = ops->gso_send_check(skb);
120 static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features)
122 struct sk_buff *segs = ERR_PTR(-EINVAL);
123 struct ipv6hdr *ipv6h;
124 struct inet6_protocol *ops;
126 if (!(features & NETIF_F_V6_CSUM))
127 features &= ~NETIF_F_SG;
129 if (unlikely(skb_shinfo(skb)->gso_type &
137 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
140 ipv6h = ipv6_hdr(skb);
141 __skb_pull(skb, sizeof(*ipv6h));
142 segs = ERR_PTR(-EPROTONOSUPPORT);
145 ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
146 if (likely(ops && ops->gso_segment)) {
147 skb_reset_transport_header(skb);
148 segs = ops->gso_segment(skb, features);
152 if (unlikely(IS_ERR(segs)))
155 for (skb = segs; skb; skb = skb->next) {
156 ipv6h = ipv6_hdr(skb);
157 ipv6h->payload_len = htons(skb->len - skb->mac_len -
165 static struct packet_type ipv6_packet_type = {
166 .type = __constant_htons(ETH_P_IPV6),
168 .gso_send_check = ipv6_gso_send_check,
169 .gso_segment = ipv6_gso_segment,
172 struct ip6_ra_chain *ip6_ra_chain;
173 DEFINE_RWLOCK(ip6_ra_lock);
175 int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *))
177 struct ip6_ra_chain *ra, *new_ra, **rap;
179 /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
180 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW)
183 new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
185 write_lock_bh(&ip6_ra_lock);
186 for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
189 write_unlock_bh(&ip6_ra_lock);
195 write_unlock_bh(&ip6_ra_lock);
204 if (new_ra == NULL) {
205 write_unlock_bh(&ip6_ra_lock);
210 new_ra->destructor = destructor;
214 write_unlock_bh(&ip6_ra_lock);
218 static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
219 char __user *optval, int optlen)
221 struct ipv6_pinfo *np = inet6_sk(sk);
223 int retv = -ENOPROTOOPT;
227 else if (get_user(val, (int __user *) optval))
237 if (val == PF_INET) {
238 struct ipv6_txoptions *opt;
239 struct sk_buff *pktopt;
241 if (sk->sk_protocol != IPPROTO_UDP &&
242 #ifdef CONFIG_IP_UDPLITE
243 sk->sk_protocol != IPPROTO_UDPLITE &&
245 sk->sk_protocol != IPPROTO_TCP)
248 if (sk->sk_state != TCP_ESTABLISHED) {
253 if (ipv6_only_sock(sk) ||
254 !ipv6_addr_v4mapped(&np->daddr)) {
255 retv = -EADDRNOTAVAIL;
259 fl6_free_socklist(sk);
260 ipv6_sock_mc_close(sk);
263 * Sock is moving from IPv6 to IPv4 (sk_prot), so
264 * remove it from the refcnt debug socks count in the
267 sk_refcnt_debug_dec(sk);
269 if (sk->sk_protocol == IPPROTO_TCP) {
270 struct inet_connection_sock *icsk = inet_csk(sk);
273 sock_prot_inuse_add(sk->sk_prot, -1);
274 sock_prot_inuse_add(&tcp_prot, 1);
276 sk->sk_prot = &tcp_prot;
277 icsk->icsk_af_ops = &ipv4_specific;
278 sk->sk_socket->ops = &inet_stream_ops;
279 sk->sk_family = PF_INET;
280 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
282 struct proto *prot = &udp_prot;
284 if (IS_PROTO_UDPLITE(sk->sk_protocol))
285 prot = &udplite_prot;
287 sock_prot_inuse_add(sk->sk_prot, -1);
288 sock_prot_inuse_add(prot, 1);
291 sk->sk_socket->ops = &inet_dgram_ops;
292 sk->sk_family = PF_INET;
294 opt = xchg(&np->opt, NULL);
296 sock_kfree_s(sk, opt, opt->tot_len);
297 pktopt = xchg(&np->pktoptions, NULL);
301 sk->sk_destruct = inet_sock_destruct;
303 * ... and add it to the refcnt debug socks count
304 * in the new family. -acme
306 sk_refcnt_debug_inc(sk);
307 module_put(THIS_MODULE);
314 if (inet_sk(sk)->num)
316 np->ipv6only = valbool;
320 case IPV6_RECVPKTINFO:
321 np->rxopt.bits.rxinfo = valbool;
325 case IPV6_2292PKTINFO:
326 np->rxopt.bits.rxoinfo = valbool;
330 case IPV6_RECVHOPLIMIT:
331 np->rxopt.bits.rxhlim = valbool;
335 case IPV6_2292HOPLIMIT:
336 np->rxopt.bits.rxohlim = valbool;
341 np->rxopt.bits.srcrt = valbool;
346 np->rxopt.bits.osrcrt = valbool;
350 case IPV6_RECVHOPOPTS:
351 np->rxopt.bits.hopopts = valbool;
355 case IPV6_2292HOPOPTS:
356 np->rxopt.bits.ohopopts = valbool;
360 case IPV6_RECVDSTOPTS:
361 np->rxopt.bits.dstopts = valbool;
365 case IPV6_2292DSTOPTS:
366 np->rxopt.bits.odstopts = valbool;
371 if (val < -1 || val > 0xff)
377 case IPV6_RECVTCLASS:
378 np->rxopt.bits.rxtclass = valbool;
383 np->rxopt.bits.rxflow = valbool;
388 case IPV6_RTHDRDSTOPTS:
392 struct ipv6_txoptions *opt;
396 /* hop-by-hop / destination options are privileged option */
398 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
402 if (optlen & 0x7 || optlen > 8 * 255)
405 opt = ipv6_renew_options(sk, np->opt, optname,
406 (struct ipv6_opt_hdr __user *)optval,
413 /* routing header option needs extra check */
414 if (optname == IPV6_RTHDR && opt && opt->srcrt) {
415 struct ipv6_rt_hdr *rthdr = opt->srcrt;
416 switch (rthdr->type) {
417 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
418 case IPV6_SRCRT_TYPE_2:
425 if ((rthdr->hdrlen & 1) ||
426 (rthdr->hdrlen >> 1) != rthdr->segments_left)
431 if (inet_sk(sk)->is_icsk) {
433 struct inet_connection_sock *icsk = inet_csk(sk);
434 if (!((1 << sk->sk_state) &
435 (TCPF_LISTEN | TCPF_CLOSE))
436 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
437 icsk->icsk_ext_hdr_len =
438 opt->opt_flen + opt->opt_nflen;
439 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
442 opt = xchg(&np->opt, opt);
445 write_lock(&sk->sk_dst_lock);
446 opt = xchg(&np->opt, opt);
447 write_unlock(&sk->sk_dst_lock);
452 sock_kfree_s(sk, opt, opt->tot_len);
456 case IPV6_2292PKTOPTIONS:
458 struct ipv6_txoptions *opt = NULL;
463 fl.fl6_flowlabel = 0;
464 fl.oif = sk->sk_bound_dev_if;
469 /* 1K is probably excessive
470 * 1K is surely not enough, 2K per standard header is 16K.
473 if (optlen > 64*1024)
476 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
481 memset(opt, 0, sizeof(*opt));
482 opt->tot_len = sizeof(*opt) + optlen;
484 if (copy_from_user(opt+1, optval, optlen))
487 msg.msg_controllen = optlen;
488 msg.msg_control = (void*)(opt+1);
490 retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk);
495 if (inet_sk(sk)->is_icsk) {
497 struct inet_connection_sock *icsk = inet_csk(sk);
498 if (!((1 << sk->sk_state) &
499 (TCPF_LISTEN | TCPF_CLOSE))
500 && inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
501 icsk->icsk_ext_hdr_len =
502 opt->opt_flen + opt->opt_nflen;
503 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
506 opt = xchg(&np->opt, opt);
509 write_lock(&sk->sk_dst_lock);
510 opt = xchg(&np->opt, opt);
511 write_unlock(&sk->sk_dst_lock);
517 sock_kfree_s(sk, opt, opt->tot_len);
520 case IPV6_UNICAST_HOPS:
521 if (val > 255 || val < -1)
527 case IPV6_MULTICAST_HOPS:
528 if (sk->sk_type == SOCK_STREAM)
530 if (val > 255 || val < -1)
532 np->mcast_hops = val;
536 case IPV6_MULTICAST_LOOP:
537 np->mc_loop = valbool;
541 case IPV6_MULTICAST_IF:
542 if (sk->sk_type == SOCK_STREAM)
546 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
549 if (__dev_get_by_index(&init_net, val) == NULL) {
557 case IPV6_ADD_MEMBERSHIP:
558 case IPV6_DROP_MEMBERSHIP:
560 struct ipv6_mreq mreq;
563 if (inet_sk(sk)->is_icsk)
567 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
570 if (optname == IPV6_ADD_MEMBERSHIP)
571 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
573 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
576 case IPV6_JOIN_ANYCAST:
577 case IPV6_LEAVE_ANYCAST:
579 struct ipv6_mreq mreq;
581 if (optlen != sizeof(struct ipv6_mreq))
585 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
588 if (optname == IPV6_JOIN_ANYCAST)
589 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
591 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
594 case MCAST_JOIN_GROUP:
595 case MCAST_LEAVE_GROUP:
597 struct group_req greq;
598 struct sockaddr_in6 *psin6;
601 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
603 if (greq.gr_group.ss_family != AF_INET6) {
604 retv = -EADDRNOTAVAIL;
607 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
608 if (optname == MCAST_JOIN_GROUP)
609 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
612 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
616 case MCAST_JOIN_SOURCE_GROUP:
617 case MCAST_LEAVE_SOURCE_GROUP:
618 case MCAST_BLOCK_SOURCE:
619 case MCAST_UNBLOCK_SOURCE:
621 struct group_source_req greqs;
624 if (optlen != sizeof(struct group_source_req))
626 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
630 if (greqs.gsr_group.ss_family != AF_INET6 ||
631 greqs.gsr_source.ss_family != AF_INET6) {
632 retv = -EADDRNOTAVAIL;
635 if (optname == MCAST_BLOCK_SOURCE) {
636 omode = MCAST_EXCLUDE;
638 } else if (optname == MCAST_UNBLOCK_SOURCE) {
639 omode = MCAST_EXCLUDE;
641 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
642 struct sockaddr_in6 *psin6;
644 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
645 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
647 /* prior join w/ different source is ok */
648 if (retv && retv != -EADDRINUSE)
650 omode = MCAST_INCLUDE;
652 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
653 omode = MCAST_INCLUDE;
656 retv = ip6_mc_source(add, omode, sk, &greqs);
661 extern int sysctl_mld_max_msf;
662 struct group_filter *gsf;
664 if (optlen < GROUP_FILTER_SIZE(0))
666 if (optlen > sysctl_optmem_max) {
670 gsf = kmalloc(optlen,GFP_KERNEL);
676 if (copy_from_user(gsf, optval, optlen)) {
680 /* numsrc >= (4G-140)/128 overflow in 32 bits */
681 if (gsf->gf_numsrc >= 0x1ffffffU ||
682 gsf->gf_numsrc > sysctl_mld_max_msf) {
687 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
692 retv = ip6_mc_msfilter(sk, gsf);
697 case IPV6_ROUTER_ALERT:
698 retv = ip6_ra_control(sk, val, NULL);
700 case IPV6_MTU_DISCOVER:
707 if (val && val < IPV6_MIN_MTU)
713 np->recverr = valbool;
715 skb_queue_purge(&sk->sk_error_queue);
718 case IPV6_FLOWINFO_SEND:
719 np->sndflow = valbool;
722 case IPV6_FLOWLABEL_MGR:
723 retv = ipv6_flowlabel_opt(sk, optval, optlen);
725 case IPV6_IPSEC_POLICY:
726 case IPV6_XFRM_POLICY:
728 if (!capable(CAP_NET_ADMIN))
730 retv = xfrm_user_policy(sk, optname, optval, optlen);
743 int ipv6_setsockopt(struct sock *sk, int level, int optname,
744 char __user *optval, int optlen)
748 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
749 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
751 if (level != SOL_IPV6)
754 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
755 #ifdef CONFIG_NETFILTER
756 /* we need to exclude all possible ENOPROTOOPTs except default case */
757 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
758 optname != IPV6_XFRM_POLICY) {
760 err = nf_setsockopt(sk, PF_INET6, optname, optval,
768 EXPORT_SYMBOL(ipv6_setsockopt);
771 int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
772 char __user *optval, int optlen)
776 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
777 if (udp_prot.compat_setsockopt != NULL)
778 return udp_prot.compat_setsockopt(sk, level, optname,
780 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
783 if (level != SOL_IPV6)
786 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
787 #ifdef CONFIG_NETFILTER
788 /* we need to exclude all possible ENOPROTOOPTs except default case */
789 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
790 optname != IPV6_XFRM_POLICY) {
792 err = compat_nf_setsockopt(sk, PF_INET6, optname,
800 EXPORT_SYMBOL(compat_ipv6_setsockopt);
803 static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
804 int optname, char __user *optval, int len)
806 struct ipv6_opt_hdr *hdr;
815 case IPV6_RTHDRDSTOPTS:
819 hdr = (struct ipv6_opt_hdr *)opt->srcrt;
825 return -EINVAL; /* should not happen */
831 len = min_t(unsigned int, len, ipv6_optlen(hdr));
832 if (copy_to_user(optval, hdr, len))
834 return ipv6_optlen(hdr);
837 static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
838 char __user *optval, int __user *optlen)
840 struct ipv6_pinfo *np = inet6_sk(sk);
844 if (get_user(len, optlen))
848 if (sk->sk_protocol != IPPROTO_UDP &&
849 #ifdef CONFIG_IP_UDPLITE
850 sk->sk_protocol != IPPROTO_UDPLITE &&
852 sk->sk_protocol != IPPROTO_TCP)
854 if (sk->sk_state != TCP_ESTABLISHED)
860 struct group_filter gsf;
863 if (len < GROUP_FILTER_SIZE(0))
865 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
868 err = ip6_mc_msfget(sk, &gsf,
869 (struct group_filter __user *)optval, optlen);
874 case IPV6_2292PKTOPTIONS:
879 if (sk->sk_type != SOCK_STREAM)
882 msg.msg_control = optval;
883 msg.msg_controllen = len;
887 skb = np->pktoptions;
889 atomic_inc(&skb->users);
893 int err = datagram_recv_ctl(sk, &msg, skb);
898 if (np->rxopt.bits.rxinfo) {
899 struct in6_pktinfo src_info;
900 src_info.ipi6_ifindex = np->mcast_oif;
901 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
902 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
904 if (np->rxopt.bits.rxhlim) {
905 int hlim = np->mcast_hops;
906 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
908 if (np->rxopt.bits.rxoinfo) {
909 struct in6_pktinfo src_info;
910 src_info.ipi6_ifindex = np->mcast_oif;
911 ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr);
912 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
914 if (np->rxopt.bits.rxohlim) {
915 int hlim = np->mcast_hops;
916 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
919 len -= msg.msg_controllen;
920 return put_user(len, optlen);
924 struct dst_entry *dst;
927 dst = sk_dst_get(sk);
942 case IPV6_RECVPKTINFO:
943 val = np->rxopt.bits.rxinfo;
946 case IPV6_2292PKTINFO:
947 val = np->rxopt.bits.rxoinfo;
950 case IPV6_RECVHOPLIMIT:
951 val = np->rxopt.bits.rxhlim;
954 case IPV6_2292HOPLIMIT:
955 val = np->rxopt.bits.rxohlim;
959 val = np->rxopt.bits.srcrt;
963 val = np->rxopt.bits.osrcrt;
967 case IPV6_RTHDRDSTOPTS:
973 len = ipv6_getsockopt_sticky(sk, np->opt,
974 optname, optval, len);
976 return put_user(len, optlen);
979 case IPV6_RECVHOPOPTS:
980 val = np->rxopt.bits.hopopts;
983 case IPV6_2292HOPOPTS:
984 val = np->rxopt.bits.ohopopts;
987 case IPV6_RECVDSTOPTS:
988 val = np->rxopt.bits.dstopts;
991 case IPV6_2292DSTOPTS:
992 val = np->rxopt.bits.odstopts;
1001 case IPV6_RECVTCLASS:
1002 val = np->rxopt.bits.rxtclass;
1006 val = np->rxopt.bits.rxflow;
1009 case IPV6_UNICAST_HOPS:
1010 case IPV6_MULTICAST_HOPS:
1012 struct dst_entry *dst;
1014 if (optname == IPV6_UNICAST_HOPS)
1015 val = np->hop_limit;
1017 val = np->mcast_hops;
1019 dst = sk_dst_get(sk);
1022 val = dst_metric(dst, RTAX_HOPLIMIT);
1024 val = ipv6_get_hoplimit(dst->dev);
1028 val = ipv6_devconf.hop_limit;
1032 case IPV6_MULTICAST_LOOP:
1036 case IPV6_MULTICAST_IF:
1037 val = np->mcast_oif;
1040 case IPV6_MTU_DISCOVER:
1048 case IPV6_FLOWINFO_SEND:
1053 return -ENOPROTOOPT;
1055 len = min_t(unsigned int, sizeof(int), len);
1056 if(put_user(len, optlen))
1058 if(copy_to_user(optval,&val,len))
1063 int ipv6_getsockopt(struct sock *sk, int level, int optname,
1064 char __user *optval, int __user *optlen)
1068 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
1069 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1071 if(level != SOL_IPV6)
1072 return -ENOPROTOOPT;
1074 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1075 #ifdef CONFIG_NETFILTER
1076 /* we need to exclude all possible ENOPROTOOPTs except default case */
1077 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
1080 if (get_user(len, optlen))
1084 err = nf_getsockopt(sk, PF_INET6, optname, optval,
1088 err = put_user(len, optlen);
1094 EXPORT_SYMBOL(ipv6_getsockopt);
1096 #ifdef CONFIG_COMPAT
1097 int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
1098 char __user *optval, int __user *optlen)
1102 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
1103 if (udp_prot.compat_getsockopt != NULL)
1104 return udp_prot.compat_getsockopt(sk, level, optname,
1106 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1109 if (level != SOL_IPV6)
1110 return -ENOPROTOOPT;
1112 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
1113 #ifdef CONFIG_NETFILTER
1114 /* we need to exclude all possible ENOPROTOOPTs except default case */
1115 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
1118 if (get_user(len, optlen))
1122 err = compat_nf_getsockopt(sk, PF_INET6,
1123 optname, optval, &len);
1126 err = put_user(len, optlen);
1132 EXPORT_SYMBOL(compat_ipv6_getsockopt);
1135 int __init ipv6_packet_init(void)
1137 dev_add_pack(&ipv6_packet_type);
1141 void ipv6_packet_cleanup(void)
1143 dev_remove_pack(&ipv6_packet_type);