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 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
15 * FIXME: Make the setsockopt code POSIX compliant: That is
17 * o Truncate getsockopt returns
18 * o Return an optlen of the truncated length if need be
21 * David L Stevens <dlstevens@us.ibm.com>:
22 * - added multicast source filtering API for MLDv2
25 #include <linux/module.h>
26 #include <linux/capability.h>
27 #include <linux/errno.h>
28 #include <linux/types.h>
29 #include <linux/socket.h>
30 #include <linux/sockios.h>
31 #include <linux/net.h>
32 #include <linux/in6.h>
33 #include <linux/mroute6.h>
34 #include <linux/netdevice.h>
35 #include <linux/if_arp.h>
36 #include <linux/init.h>
37 #include <linux/sysctl.h>
38 #include <linux/netfilter.h>
39 #include <linux/slab.h>
44 #include <net/ndisc.h>
45 #include <net/protocol.h>
46 #include <net/transp_v6.h>
47 #include <net/ip6_route.h>
48 #include <net/addrconf.h>
49 #include <net/inet_common.h>
52 #include <net/udplite.h>
54 #include <net/compat.h>
56 #include <asm/uaccess.h>
58 struct ip6_ra_chain *ip6_ra_chain;
59 DEFINE_RWLOCK(ip6_ra_lock);
61 int ip6_ra_control(struct sock *sk, int sel)
63 struct ip6_ra_chain *ra, *new_ra, **rap;
65 /* RA packet may be delivered ONLY to IPPROTO_RAW socket */
66 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num != IPPROTO_RAW)
69 new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
71 write_lock_bh(&ip6_ra_lock);
72 for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
75 write_unlock_bh(&ip6_ra_lock);
81 write_unlock_bh(&ip6_ra_lock);
89 write_unlock_bh(&ip6_ra_lock);
97 write_unlock_bh(&ip6_ra_lock);
102 struct ipv6_txoptions *ipv6_update_options(struct sock *sk,
103 struct ipv6_txoptions *opt)
105 if (inet_sk(sk)->is_icsk) {
107 !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
108 inet_sk(sk)->inet_daddr != LOOPBACK4_IPV6) {
109 struct inet_connection_sock *icsk = inet_csk(sk);
110 icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen;
111 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
113 opt = xchg(&inet6_sk(sk)->opt, opt);
115 spin_lock(&sk->sk_dst_lock);
116 opt = xchg(&inet6_sk(sk)->opt, opt);
117 spin_unlock(&sk->sk_dst_lock);
124 static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
125 char __user *optval, unsigned int optlen)
127 struct ipv6_pinfo *np = inet6_sk(sk);
128 struct net *net = sock_net(sk);
130 int retv = -ENOPROTOOPT;
135 if (optlen >= sizeof(int)) {
136 if (get_user(val, (int __user *) optval))
144 if (ip6_mroute_opt(optname))
145 return ip6_mroute_setsockopt(sk, optname, optval, optlen);
152 if (optlen < sizeof(int))
154 if (val == PF_INET) {
155 struct ipv6_txoptions *opt;
156 struct sk_buff *pktopt;
158 if (sk->sk_type == SOCK_RAW)
161 if (sk->sk_protocol == IPPROTO_UDP ||
162 sk->sk_protocol == IPPROTO_UDPLITE) {
163 struct udp_sock *up = udp_sk(sk);
164 if (up->pending == AF_INET6) {
168 } else if (sk->sk_protocol != IPPROTO_TCP)
171 if (sk->sk_state != TCP_ESTABLISHED) {
176 if (ipv6_only_sock(sk) ||
177 !ipv6_addr_v4mapped(&np->daddr)) {
178 retv = -EADDRNOTAVAIL;
182 fl6_free_socklist(sk);
183 ipv6_sock_mc_close(sk);
186 * Sock is moving from IPv6 to IPv4 (sk_prot), so
187 * remove it from the refcnt debug socks count in the
190 sk_refcnt_debug_dec(sk);
192 if (sk->sk_protocol == IPPROTO_TCP) {
193 struct inet_connection_sock *icsk = inet_csk(sk);
195 sock_prot_inuse_add(net, sk->sk_prot, -1);
196 sock_prot_inuse_add(net, &tcp_prot, 1);
198 sk->sk_prot = &tcp_prot;
199 icsk->icsk_af_ops = &ipv4_specific;
200 sk->sk_socket->ops = &inet_stream_ops;
201 sk->sk_family = PF_INET;
202 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
204 struct proto *prot = &udp_prot;
206 if (sk->sk_protocol == IPPROTO_UDPLITE)
207 prot = &udplite_prot;
209 sock_prot_inuse_add(net, sk->sk_prot, -1);
210 sock_prot_inuse_add(net, prot, 1);
213 sk->sk_socket->ops = &inet_dgram_ops;
214 sk->sk_family = PF_INET;
216 opt = xchg(&np->opt, NULL);
218 sock_kfree_s(sk, opt, opt->tot_len);
219 pktopt = xchg(&np->pktoptions, NULL);
222 sk->sk_destruct = inet_sock_destruct;
224 * ... and add it to the refcnt debug socks count
225 * in the new family. -acme
227 sk_refcnt_debug_inc(sk);
228 module_put(THIS_MODULE);
235 if (optlen < sizeof(int) ||
236 inet_sk(sk)->inet_num)
238 np->ipv6only = valbool;
242 case IPV6_RECVPKTINFO:
243 if (optlen < sizeof(int))
245 np->rxopt.bits.rxinfo = valbool;
249 case IPV6_2292PKTINFO:
250 if (optlen < sizeof(int))
252 np->rxopt.bits.rxoinfo = valbool;
256 case IPV6_RECVHOPLIMIT:
257 if (optlen < sizeof(int))
259 np->rxopt.bits.rxhlim = valbool;
263 case IPV6_2292HOPLIMIT:
264 if (optlen < sizeof(int))
266 np->rxopt.bits.rxohlim = valbool;
271 if (optlen < sizeof(int))
273 np->rxopt.bits.srcrt = valbool;
278 if (optlen < sizeof(int))
280 np->rxopt.bits.osrcrt = valbool;
284 case IPV6_RECVHOPOPTS:
285 if (optlen < sizeof(int))
287 np->rxopt.bits.hopopts = valbool;
291 case IPV6_2292HOPOPTS:
292 if (optlen < sizeof(int))
294 np->rxopt.bits.ohopopts = valbool;
298 case IPV6_RECVDSTOPTS:
299 if (optlen < sizeof(int))
301 np->rxopt.bits.dstopts = valbool;
305 case IPV6_2292DSTOPTS:
306 if (optlen < sizeof(int))
308 np->rxopt.bits.odstopts = valbool;
313 if (optlen < sizeof(int))
315 if (val < -1 || val > 0xff)
317 /* RFC 3542, 6.5: default traffic class of 0x0 */
324 case IPV6_RECVTCLASS:
325 if (optlen < sizeof(int))
327 np->rxopt.bits.rxtclass = valbool;
332 if (optlen < sizeof(int))
334 np->rxopt.bits.rxflow = valbool;
338 case IPV6_RECVPATHMTU:
339 if (optlen < sizeof(int))
341 np->rxopt.bits.rxpmtu = valbool;
345 case IPV6_TRANSPARENT:
346 if (valbool && !capable(CAP_NET_ADMIN) && !capable(CAP_NET_RAW)) {
350 if (optlen < sizeof(int))
352 /* we don't have a separate transparent bit for IPV6 we use the one in the IPv4 socket */
353 inet_sk(sk)->transparent = valbool;
357 case IPV6_RECVORIGDSTADDR:
358 if (optlen < sizeof(int))
360 np->rxopt.bits.rxorigdstaddr = valbool;
365 case IPV6_RTHDRDSTOPTS:
369 struct ipv6_txoptions *opt;
371 /* remove any sticky options header with a zero option
372 * length, per RFC3542.
376 else if (optval == NULL)
378 else if (optlen < sizeof(struct ipv6_opt_hdr) ||
379 optlen & 0x7 || optlen > 8 * 255)
382 /* hop-by-hop / destination options are privileged option */
384 if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
387 opt = ipv6_renew_options(sk, np->opt, optname,
388 (struct ipv6_opt_hdr __user *)optval,
395 /* routing header option needs extra check */
397 if (optname == IPV6_RTHDR && opt && opt->srcrt) {
398 struct ipv6_rt_hdr *rthdr = opt->srcrt;
399 switch (rthdr->type) {
400 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
401 case IPV6_SRCRT_TYPE_2:
402 if (rthdr->hdrlen != 2 ||
403 rthdr->segments_left != 1)
414 opt = ipv6_update_options(sk, opt);
417 sock_kfree_s(sk, opt, opt->tot_len);
423 struct in6_pktinfo pkt;
427 else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL)
430 if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) {
434 if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if)
437 np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex;
438 np->sticky_pktinfo.ipi6_addr = pkt.ipi6_addr;
443 case IPV6_2292PKTOPTIONS:
445 struct ipv6_txoptions *opt = NULL;
450 memset(&fl6, 0, sizeof(fl6));
451 fl6.flowi6_oif = sk->sk_bound_dev_if;
452 fl6.flowi6_mark = sk->sk_mark;
457 /* 1K is probably excessive
458 * 1K is surely not enough, 2K per standard header is 16K.
461 if (optlen > 64*1024)
464 opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL);
469 memset(opt, 0, sizeof(*opt));
470 opt->tot_len = sizeof(*opt) + optlen;
472 if (copy_from_user(opt+1, optval, optlen))
475 msg.msg_controllen = optlen;
476 msg.msg_control = (void*)(opt+1);
478 retv = datagram_send_ctl(net, sk, &msg, &fl6, opt, &junk, &junk,
484 opt = ipv6_update_options(sk, opt);
487 sock_kfree_s(sk, opt, opt->tot_len);
490 case IPV6_UNICAST_HOPS:
491 if (optlen < sizeof(int))
493 if (val > 255 || val < -1)
499 case IPV6_MULTICAST_HOPS:
500 if (sk->sk_type == SOCK_STREAM)
502 if (optlen < sizeof(int))
504 if (val > 255 || val < -1)
506 np->mcast_hops = (val == -1 ? IPV6_DEFAULT_MCASTHOPS : val);
510 case IPV6_MULTICAST_LOOP:
511 if (optlen < sizeof(int))
515 np->mc_loop = valbool;
519 case IPV6_UNICAST_IF:
521 struct net_device *dev = NULL;
524 if (optlen != sizeof(int))
527 ifindex = (__force int)ntohl((__force __be32)val);
534 dev = dev_get_by_index(net, ifindex);
535 retv = -EADDRNOTAVAIL;
541 if (sk->sk_bound_dev_if)
544 np->ucast_oif = ifindex;
549 case IPV6_MULTICAST_IF:
550 if (sk->sk_type == SOCK_STREAM)
552 if (optlen < sizeof(int))
556 struct net_device *dev;
558 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val)
561 dev = dev_get_by_index(net, val);
571 case IPV6_ADD_MEMBERSHIP:
572 case IPV6_DROP_MEMBERSHIP:
574 struct ipv6_mreq mreq;
576 if (optlen < sizeof(struct ipv6_mreq))
580 if (inet_sk(sk)->is_icsk)
584 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
587 if (optname == IPV6_ADD_MEMBERSHIP)
588 retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
590 retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr);
593 case IPV6_JOIN_ANYCAST:
594 case IPV6_LEAVE_ANYCAST:
596 struct ipv6_mreq mreq;
598 if (optlen < sizeof(struct ipv6_mreq))
602 if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))
605 if (optname == IPV6_JOIN_ANYCAST)
606 retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
608 retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr);
611 case MCAST_JOIN_GROUP:
612 case MCAST_LEAVE_GROUP:
614 struct group_req greq;
615 struct sockaddr_in6 *psin6;
617 if (optlen < sizeof(struct group_req))
621 if (copy_from_user(&greq, optval, sizeof(struct group_req)))
623 if (greq.gr_group.ss_family != AF_INET6) {
624 retv = -EADDRNOTAVAIL;
627 psin6 = (struct sockaddr_in6 *)&greq.gr_group;
628 if (optname == MCAST_JOIN_GROUP)
629 retv = ipv6_sock_mc_join(sk, greq.gr_interface,
632 retv = ipv6_sock_mc_drop(sk, greq.gr_interface,
636 case MCAST_JOIN_SOURCE_GROUP:
637 case MCAST_LEAVE_SOURCE_GROUP:
638 case MCAST_BLOCK_SOURCE:
639 case MCAST_UNBLOCK_SOURCE:
641 struct group_source_req greqs;
644 if (optlen < sizeof(struct group_source_req))
646 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
650 if (greqs.gsr_group.ss_family != AF_INET6 ||
651 greqs.gsr_source.ss_family != AF_INET6) {
652 retv = -EADDRNOTAVAIL;
655 if (optname == MCAST_BLOCK_SOURCE) {
656 omode = MCAST_EXCLUDE;
658 } else if (optname == MCAST_UNBLOCK_SOURCE) {
659 omode = MCAST_EXCLUDE;
661 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
662 struct sockaddr_in6 *psin6;
664 psin6 = (struct sockaddr_in6 *)&greqs.gsr_group;
665 retv = ipv6_sock_mc_join(sk, greqs.gsr_interface,
667 /* prior join w/ different source is ok */
668 if (retv && retv != -EADDRINUSE)
670 omode = MCAST_INCLUDE;
672 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
673 omode = MCAST_INCLUDE;
676 retv = ip6_mc_source(add, omode, sk, &greqs);
681 extern int sysctl_mld_max_msf;
682 struct group_filter *gsf;
684 if (optlen < GROUP_FILTER_SIZE(0))
686 if (optlen > sysctl_optmem_max) {
690 gsf = kmalloc(optlen,GFP_KERNEL);
696 if (copy_from_user(gsf, optval, optlen)) {
700 /* numsrc >= (4G-140)/128 overflow in 32 bits */
701 if (gsf->gf_numsrc >= 0x1ffffffU ||
702 gsf->gf_numsrc > sysctl_mld_max_msf) {
707 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
712 retv = ip6_mc_msfilter(sk, gsf);
717 case IPV6_ROUTER_ALERT:
718 if (optlen < sizeof(int))
720 retv = ip6_ra_control(sk, val);
722 case IPV6_MTU_DISCOVER:
723 if (optlen < sizeof(int))
725 if (val < IP_PMTUDISC_DONT || val > IP_PMTUDISC_PROBE)
731 if (optlen < sizeof(int))
733 if (val && val < IPV6_MIN_MTU)
739 if (optlen < sizeof(int))
741 np->recverr = valbool;
743 skb_queue_purge(&sk->sk_error_queue);
746 case IPV6_FLOWINFO_SEND:
747 if (optlen < sizeof(int))
749 np->sndflow = valbool;
752 case IPV6_FLOWLABEL_MGR:
753 retv = ipv6_flowlabel_opt(sk, optval, optlen);
755 case IPV6_IPSEC_POLICY:
756 case IPV6_XFRM_POLICY:
758 if (!capable(CAP_NET_ADMIN))
760 retv = xfrm_user_policy(sk, optname, optval, optlen);
763 case IPV6_ADDR_PREFERENCES:
765 unsigned int pref = 0;
766 unsigned int prefmask = ~0;
768 if (optlen < sizeof(int))
773 /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */
774 switch (val & (IPV6_PREFER_SRC_PUBLIC|
776 IPV6_PREFER_SRC_PUBTMP_DEFAULT)) {
777 case IPV6_PREFER_SRC_PUBLIC:
778 pref |= IPV6_PREFER_SRC_PUBLIC;
780 case IPV6_PREFER_SRC_TMP:
781 pref |= IPV6_PREFER_SRC_TMP;
783 case IPV6_PREFER_SRC_PUBTMP_DEFAULT:
786 goto pref_skip_pubtmp;
791 prefmask &= ~(IPV6_PREFER_SRC_PUBLIC|
792 IPV6_PREFER_SRC_TMP);
795 /* check HOME/COA conflicts */
796 switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) {
797 case IPV6_PREFER_SRC_HOME:
799 case IPV6_PREFER_SRC_COA:
800 pref |= IPV6_PREFER_SRC_COA;
807 prefmask &= ~IPV6_PREFER_SRC_COA;
810 /* check CGA/NONCGA conflicts */
811 switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) {
812 case IPV6_PREFER_SRC_CGA:
813 case IPV6_PREFER_SRC_NONCGA:
820 np->srcprefs = (np->srcprefs & prefmask) | pref;
825 case IPV6_MINHOPCOUNT:
826 if (optlen < sizeof(int))
828 if (val < 0 || val > 255)
830 np->min_hopcount = val;
833 np->dontfrag = valbool;
847 int ipv6_setsockopt(struct sock *sk, int level, int optname,
848 char __user *optval, unsigned int optlen)
852 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
853 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
855 if (level != SOL_IPV6)
858 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
859 #ifdef CONFIG_NETFILTER
860 /* we need to exclude all possible ENOPROTOOPTs except default case */
861 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
862 optname != IPV6_XFRM_POLICY) {
864 err = nf_setsockopt(sk, PF_INET6, optname, optval,
872 EXPORT_SYMBOL(ipv6_setsockopt);
875 int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
876 char __user *optval, unsigned int optlen)
880 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
881 if (udp_prot.compat_setsockopt != NULL)
882 return udp_prot.compat_setsockopt(sk, level, optname,
884 return udp_prot.setsockopt(sk, level, optname, optval, optlen);
887 if (level != SOL_IPV6)
890 if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER)
891 return compat_mc_setsockopt(sk, level, optname, optval, optlen,
894 err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
895 #ifdef CONFIG_NETFILTER
896 /* we need to exclude all possible ENOPROTOOPTs except default case */
897 if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
898 optname != IPV6_XFRM_POLICY) {
900 err = compat_nf_setsockopt(sk, PF_INET6, optname,
908 EXPORT_SYMBOL(compat_ipv6_setsockopt);
911 static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
912 int optname, char __user *optval, int len)
914 struct ipv6_opt_hdr *hdr;
923 case IPV6_RTHDRDSTOPTS:
927 hdr = (struct ipv6_opt_hdr *)opt->srcrt;
933 return -EINVAL; /* should not happen */
939 len = min_t(unsigned int, len, ipv6_optlen(hdr));
940 if (copy_to_user(optval, hdr, len))
945 static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
946 char __user *optval, int __user *optlen, unsigned flags)
948 struct ipv6_pinfo *np = inet6_sk(sk);
952 if (ip6_mroute_opt(optname))
953 return ip6_mroute_getsockopt(sk, optname, optval, optlen);
955 if (get_user(len, optlen))
959 if (sk->sk_protocol != IPPROTO_UDP &&
960 sk->sk_protocol != IPPROTO_UDPLITE &&
961 sk->sk_protocol != IPPROTO_TCP)
963 if (sk->sk_state != TCP_ESTABLISHED)
969 struct group_filter gsf;
972 if (len < GROUP_FILTER_SIZE(0))
974 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0)))
976 if (gsf.gf_group.ss_family != AF_INET6)
977 return -EADDRNOTAVAIL;
979 err = ip6_mc_msfget(sk, &gsf,
980 (struct group_filter __user *)optval, optlen);
985 case IPV6_2292PKTOPTIONS:
990 if (sk->sk_type != SOCK_STREAM)
993 msg.msg_control = optval;
994 msg.msg_controllen = len;
995 msg.msg_flags = flags;
998 skb = np->pktoptions;
1000 atomic_inc(&skb->users);
1004 int err = datagram_recv_ctl(sk, &msg, skb);
1009 if (np->rxopt.bits.rxinfo) {
1010 struct in6_pktinfo src_info;
1011 src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif :
1012 np->sticky_pktinfo.ipi6_ifindex;
1013 src_info.ipi6_addr = np->mcast_oif ? np->daddr : np->sticky_pktinfo.ipi6_addr;
1014 put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info);
1016 if (np->rxopt.bits.rxhlim) {
1017 int hlim = np->mcast_hops;
1018 put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);
1020 if (np->rxopt.bits.rxtclass) {
1021 int tclass = np->rcv_tclass;
1022 put_cmsg(&msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass);
1024 if (np->rxopt.bits.rxoinfo) {
1025 struct in6_pktinfo src_info;
1026 src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif :
1027 np->sticky_pktinfo.ipi6_ifindex;
1028 src_info.ipi6_addr = np->mcast_oif ? np->daddr : np->sticky_pktinfo.ipi6_addr;
1029 put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info);
1031 if (np->rxopt.bits.rxohlim) {
1032 int hlim = np->mcast_hops;
1033 put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
1036 len -= msg.msg_controllen;
1037 return put_user(len, optlen);
1041 struct dst_entry *dst;
1045 dst = __sk_dst_get(sk);
1058 case IPV6_RECVPKTINFO:
1059 val = np->rxopt.bits.rxinfo;
1062 case IPV6_2292PKTINFO:
1063 val = np->rxopt.bits.rxoinfo;
1066 case IPV6_RECVHOPLIMIT:
1067 val = np->rxopt.bits.rxhlim;
1070 case IPV6_2292HOPLIMIT:
1071 val = np->rxopt.bits.rxohlim;
1074 case IPV6_RECVRTHDR:
1075 val = np->rxopt.bits.srcrt;
1078 case IPV6_2292RTHDR:
1079 val = np->rxopt.bits.osrcrt;
1083 case IPV6_RTHDRDSTOPTS:
1089 len = ipv6_getsockopt_sticky(sk, np->opt,
1090 optname, optval, len);
1092 /* check if ipv6_getsockopt_sticky() returns err code */
1095 return put_user(len, optlen);
1098 case IPV6_RECVHOPOPTS:
1099 val = np->rxopt.bits.hopopts;
1102 case IPV6_2292HOPOPTS:
1103 val = np->rxopt.bits.ohopopts;
1106 case IPV6_RECVDSTOPTS:
1107 val = np->rxopt.bits.dstopts;
1110 case IPV6_2292DSTOPTS:
1111 val = np->rxopt.bits.odstopts;
1118 case IPV6_RECVTCLASS:
1119 val = np->rxopt.bits.rxtclass;
1123 val = np->rxopt.bits.rxflow;
1126 case IPV6_RECVPATHMTU:
1127 val = np->rxopt.bits.rxpmtu;
1132 struct dst_entry *dst;
1133 struct ip6_mtuinfo mtuinfo;
1135 if (len < sizeof(mtuinfo))
1138 len = sizeof(mtuinfo);
1139 memset(&mtuinfo, 0, sizeof(mtuinfo));
1142 dst = __sk_dst_get(sk);
1144 mtuinfo.ip6m_mtu = dst_mtu(dst);
1146 if (!mtuinfo.ip6m_mtu)
1149 if (put_user(len, optlen))
1151 if (copy_to_user(optval, &mtuinfo, len))
1158 case IPV6_TRANSPARENT:
1159 val = inet_sk(sk)->transparent;
1162 case IPV6_RECVORIGDSTADDR:
1163 val = np->rxopt.bits.rxorigdstaddr;
1166 case IPV6_UNICAST_HOPS:
1167 case IPV6_MULTICAST_HOPS:
1169 struct dst_entry *dst;
1171 if (optname == IPV6_UNICAST_HOPS)
1172 val = np->hop_limit;
1174 val = np->mcast_hops;
1178 dst = __sk_dst_get(sk);
1180 val = ip6_dst_hoplimit(dst);
1185 val = sock_net(sk)->ipv6.devconf_all->hop_limit;
1189 case IPV6_MULTICAST_LOOP:
1193 case IPV6_MULTICAST_IF:
1194 val = np->mcast_oif;
1197 case IPV6_UNICAST_IF:
1198 val = (__force int)htonl((__u32) np->ucast_oif);
1201 case IPV6_MTU_DISCOVER:
1209 case IPV6_FLOWINFO_SEND:
1213 case IPV6_ADDR_PREFERENCES:
1216 if (np->srcprefs & IPV6_PREFER_SRC_TMP)
1217 val |= IPV6_PREFER_SRC_TMP;
1218 else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC)
1219 val |= IPV6_PREFER_SRC_PUBLIC;
1221 /* XXX: should we return system default? */
1222 val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT;
1225 if (np->srcprefs & IPV6_PREFER_SRC_COA)
1226 val |= IPV6_PREFER_SRC_COA;
1228 val |= IPV6_PREFER_SRC_HOME;
1231 case IPV6_MINHOPCOUNT:
1232 val = np->min_hopcount;
1240 return -ENOPROTOOPT;
1242 len = min_t(unsigned int, sizeof(int), len);
1243 if(put_user(len, optlen))
1245 if(copy_to_user(optval,&val,len))
1250 int ipv6_getsockopt(struct sock *sk, int level, int optname,
1251 char __user *optval, int __user *optlen)
1255 if (level == SOL_IP && sk->sk_type != SOCK_RAW)
1256 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1258 if(level != SOL_IPV6)
1259 return -ENOPROTOOPT;
1261 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 0);
1262 #ifdef CONFIG_NETFILTER
1263 /* we need to exclude all possible ENOPROTOOPTs except default case */
1264 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
1267 if (get_user(len, optlen))
1271 err = nf_getsockopt(sk, PF_INET6, optname, optval,
1275 err = put_user(len, optlen);
1281 EXPORT_SYMBOL(ipv6_getsockopt);
1283 #ifdef CONFIG_COMPAT
1284 int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
1285 char __user *optval, int __user *optlen)
1289 if (level == SOL_IP && sk->sk_type != SOCK_RAW) {
1290 if (udp_prot.compat_getsockopt != NULL)
1291 return udp_prot.compat_getsockopt(sk, level, optname,
1293 return udp_prot.getsockopt(sk, level, optname, optval, optlen);
1296 if (level != SOL_IPV6)
1297 return -ENOPROTOOPT;
1299 if (optname == MCAST_MSFILTER)
1300 return compat_mc_getsockopt(sk, level, optname, optval, optlen,
1303 err = do_ipv6_getsockopt(sk, level, optname, optval, optlen,
1305 #ifdef CONFIG_NETFILTER
1306 /* we need to exclude all possible ENOPROTOOPTs except default case */
1307 if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
1310 if (get_user(len, optlen))
1314 err = compat_nf_getsockopt(sk, PF_INET6,
1315 optname, optval, &len);
1318 err = put_user(len, optlen);
1324 EXPORT_SYMBOL(compat_ipv6_getsockopt);