11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * IPv6 BSD socket options interface 31da177e4SLinus Torvalds * Linux INET6 implementation 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Authors: 61da177e4SLinus Torvalds * Pedro Roque <roque@di.fc.ul.pt> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * Based on linux/net/ipv4/ip_sockglue.c 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds * $Id: ipv6_sockglue.c,v 1.41 2002/02/01 22:01:04 davem Exp $ 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 131da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 141da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 151da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 161da177e4SLinus Torvalds * 171da177e4SLinus Torvalds * FIXME: Make the setsockopt code POSIX compliant: That is 181da177e4SLinus Torvalds * 191da177e4SLinus Torvalds * o Return -EINVAL for setsockopt of short lengths 201da177e4SLinus Torvalds * o Truncate getsockopt returns 211da177e4SLinus Torvalds * o Return an optlen of the truncated length if need be 221da177e4SLinus Torvalds * 231da177e4SLinus Torvalds * Changes: 241da177e4SLinus Torvalds * David L Stevens <dlstevens@us.ibm.com>: 251da177e4SLinus Torvalds * - added multicast source filtering API for MLDv2 261da177e4SLinus Torvalds */ 271da177e4SLinus Torvalds 281da177e4SLinus Torvalds #include <linux/module.h> 294fc268d2SRandy Dunlap #include <linux/capability.h> 301da177e4SLinus Torvalds #include <linux/errno.h> 311da177e4SLinus Torvalds #include <linux/types.h> 321da177e4SLinus Torvalds #include <linux/socket.h> 331da177e4SLinus Torvalds #include <linux/sockios.h> 341da177e4SLinus Torvalds #include <linux/net.h> 351da177e4SLinus Torvalds #include <linux/in6.h> 361da177e4SLinus Torvalds #include <linux/netdevice.h> 371da177e4SLinus Torvalds #include <linux/if_arp.h> 381da177e4SLinus Torvalds #include <linux/init.h> 391da177e4SLinus Torvalds #include <linux/sysctl.h> 401da177e4SLinus Torvalds #include <linux/netfilter.h> 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds #include <net/sock.h> 431da177e4SLinus Torvalds #include <net/snmp.h> 441da177e4SLinus Torvalds #include <net/ipv6.h> 451da177e4SLinus Torvalds #include <net/ndisc.h> 461da177e4SLinus Torvalds #include <net/protocol.h> 471da177e4SLinus Torvalds #include <net/transp_v6.h> 481da177e4SLinus Torvalds #include <net/ip6_route.h> 491da177e4SLinus Torvalds #include <net/addrconf.h> 501da177e4SLinus Torvalds #include <net/inet_common.h> 511da177e4SLinus Torvalds #include <net/tcp.h> 521da177e4SLinus Torvalds #include <net/udp.h> 53ba4e58ecSGerrit Renker #include <net/udplite.h> 541da177e4SLinus Torvalds #include <net/xfrm.h> 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds #include <asm/uaccess.h> 571da177e4SLinus Torvalds 58ba89966cSEric Dumazet DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly; 591da177e4SLinus Torvalds 601da177e4SLinus Torvalds struct ip6_ra_chain *ip6_ra_chain; 611da177e4SLinus Torvalds DEFINE_RWLOCK(ip6_ra_lock); 621da177e4SLinus Torvalds 631da177e4SLinus Torvalds int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *)) 641da177e4SLinus Torvalds { 651da177e4SLinus Torvalds struct ip6_ra_chain *ra, *new_ra, **rap; 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds /* RA packet may be delivered ONLY to IPPROTO_RAW socket */ 681da177e4SLinus Torvalds if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW) 691da177e4SLinus Torvalds return -EINVAL; 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds write_lock_bh(&ip6_ra_lock); 741da177e4SLinus Torvalds for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) { 751da177e4SLinus Torvalds if (ra->sk == sk) { 761da177e4SLinus Torvalds if (sel>=0) { 771da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 781da177e4SLinus Torvalds kfree(new_ra); 791da177e4SLinus Torvalds return -EADDRINUSE; 801da177e4SLinus Torvalds } 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds *rap = ra->next; 831da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds if (ra->destructor) 861da177e4SLinus Torvalds ra->destructor(sk); 871da177e4SLinus Torvalds sock_put(sk); 881da177e4SLinus Torvalds kfree(ra); 891da177e4SLinus Torvalds return 0; 901da177e4SLinus Torvalds } 911da177e4SLinus Torvalds } 921da177e4SLinus Torvalds if (new_ra == NULL) { 931da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 941da177e4SLinus Torvalds return -ENOBUFS; 951da177e4SLinus Torvalds } 961da177e4SLinus Torvalds new_ra->sk = sk; 971da177e4SLinus Torvalds new_ra->sel = sel; 981da177e4SLinus Torvalds new_ra->destructor = destructor; 991da177e4SLinus Torvalds new_ra->next = ra; 1001da177e4SLinus Torvalds *rap = new_ra; 1011da177e4SLinus Torvalds sock_hold(sk); 1021da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 1031da177e4SLinus Torvalds return 0; 1041da177e4SLinus Torvalds } 1051da177e4SLinus Torvalds 1063fdadf7dSDmitry Mishin static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, 1071da177e4SLinus Torvalds char __user *optval, int optlen) 1081da177e4SLinus Torvalds { 1091da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 1103b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(sk); 1111da177e4SLinus Torvalds int val, valbool; 1121da177e4SLinus Torvalds int retv = -ENOPROTOOPT; 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds if (optval == NULL) 1151da177e4SLinus Torvalds val=0; 1161da177e4SLinus Torvalds else if (get_user(val, (int __user *) optval)) 1171da177e4SLinus Torvalds return -EFAULT; 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds valbool = (val!=0); 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds lock_sock(sk); 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds switch (optname) { 1241da177e4SLinus Torvalds 1251da177e4SLinus Torvalds case IPV6_ADDRFORM: 1261da177e4SLinus Torvalds if (val == PF_INET) { 1271da177e4SLinus Torvalds struct ipv6_txoptions *opt; 1281da177e4SLinus Torvalds struct sk_buff *pktopt; 1291da177e4SLinus Torvalds 1301da177e4SLinus Torvalds if (sk->sk_protocol != IPPROTO_UDP && 131ba4e58ecSGerrit Renker sk->sk_protocol != IPPROTO_UDPLITE && 1321da177e4SLinus Torvalds sk->sk_protocol != IPPROTO_TCP) 1331da177e4SLinus Torvalds break; 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) { 1361da177e4SLinus Torvalds retv = -ENOTCONN; 1371da177e4SLinus Torvalds break; 1381da177e4SLinus Torvalds } 1391da177e4SLinus Torvalds 1401da177e4SLinus Torvalds if (ipv6_only_sock(sk) || 141e773e4faSBrian Haley !ipv6_addr_v4mapped(&np->daddr)) { 1421da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 1431da177e4SLinus Torvalds break; 1441da177e4SLinus Torvalds } 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds fl6_free_socklist(sk); 1471da177e4SLinus Torvalds ipv6_sock_mc_close(sk); 1481da177e4SLinus Torvalds 149e6848976SArnaldo Carvalho de Melo /* 150e6848976SArnaldo Carvalho de Melo * Sock is moving from IPv6 to IPv4 (sk_prot), so 151e6848976SArnaldo Carvalho de Melo * remove it from the refcnt debug socks count in the 152e6848976SArnaldo Carvalho de Melo * original family... 153e6848976SArnaldo Carvalho de Melo */ 154e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_dec(sk); 155e6848976SArnaldo Carvalho de Melo 1561da177e4SLinus Torvalds if (sk->sk_protocol == IPPROTO_TCP) { 157d83d8461SArnaldo Carvalho de Melo struct inet_connection_sock *icsk = inet_csk(sk); 1581da177e4SLinus Torvalds 1591da177e4SLinus Torvalds local_bh_disable(); 16065f76517SEric Dumazet sock_prot_inuse_add(sk->sk_prot, -1); 16165f76517SEric Dumazet sock_prot_inuse_add(&tcp_prot, 1); 1621da177e4SLinus Torvalds local_bh_enable(); 1631da177e4SLinus Torvalds sk->sk_prot = &tcp_prot; 164d83d8461SArnaldo Carvalho de Melo icsk->icsk_af_ops = &ipv4_specific; 1651da177e4SLinus Torvalds sk->sk_socket->ops = &inet_stream_ops; 1661da177e4SLinus Torvalds sk->sk_family = PF_INET; 167d83d8461SArnaldo Carvalho de Melo tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); 1681da177e4SLinus Torvalds } else { 169ba4e58ecSGerrit Renker struct proto *prot = &udp_prot; 170ba4e58ecSGerrit Renker 171db8dac20SDavid S. Miller if (sk->sk_protocol == IPPROTO_UDPLITE) 172ba4e58ecSGerrit Renker prot = &udplite_prot; 1731da177e4SLinus Torvalds local_bh_disable(); 17465f76517SEric Dumazet sock_prot_inuse_add(sk->sk_prot, -1); 17565f76517SEric Dumazet sock_prot_inuse_add(prot, 1); 1761da177e4SLinus Torvalds local_bh_enable(); 177ba4e58ecSGerrit Renker sk->sk_prot = prot; 1781da177e4SLinus Torvalds sk->sk_socket->ops = &inet_dgram_ops; 1791da177e4SLinus Torvalds sk->sk_family = PF_INET; 1801da177e4SLinus Torvalds } 1811da177e4SLinus Torvalds opt = xchg(&np->opt, NULL); 1821da177e4SLinus Torvalds if (opt) 1831da177e4SLinus Torvalds sock_kfree_s(sk, opt, opt->tot_len); 1841da177e4SLinus Torvalds pktopt = xchg(&np->pktoptions, NULL); 1851da177e4SLinus Torvalds if (pktopt) 1861da177e4SLinus Torvalds kfree_skb(pktopt); 1871da177e4SLinus Torvalds 1881da177e4SLinus Torvalds sk->sk_destruct = inet_sock_destruct; 189e6848976SArnaldo Carvalho de Melo /* 190e6848976SArnaldo Carvalho de Melo * ... and add it to the refcnt debug socks count 191e6848976SArnaldo Carvalho de Melo * in the new family. -acme 192e6848976SArnaldo Carvalho de Melo */ 193e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_inc(sk); 1941da177e4SLinus Torvalds module_put(THIS_MODULE); 1951da177e4SLinus Torvalds retv = 0; 1961da177e4SLinus Torvalds break; 1971da177e4SLinus Torvalds } 1981da177e4SLinus Torvalds goto e_inval; 1991da177e4SLinus Torvalds 2001da177e4SLinus Torvalds case IPV6_V6ONLY: 2011da177e4SLinus Torvalds if (inet_sk(sk)->num) 2021da177e4SLinus Torvalds goto e_inval; 2031da177e4SLinus Torvalds np->ipv6only = valbool; 2041da177e4SLinus Torvalds retv = 0; 2051da177e4SLinus Torvalds break; 2061da177e4SLinus Torvalds 207333fad53SYOSHIFUJI Hideaki case IPV6_RECVPKTINFO: 2081da177e4SLinus Torvalds np->rxopt.bits.rxinfo = valbool; 2091da177e4SLinus Torvalds retv = 0; 2101da177e4SLinus Torvalds break; 2111da177e4SLinus Torvalds 212333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 213333fad53SYOSHIFUJI Hideaki np->rxopt.bits.rxoinfo = valbool; 214333fad53SYOSHIFUJI Hideaki retv = 0; 215333fad53SYOSHIFUJI Hideaki break; 216333fad53SYOSHIFUJI Hideaki 217333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPLIMIT: 2181da177e4SLinus Torvalds np->rxopt.bits.rxhlim = valbool; 2191da177e4SLinus Torvalds retv = 0; 2201da177e4SLinus Torvalds break; 2211da177e4SLinus Torvalds 222333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 223333fad53SYOSHIFUJI Hideaki np->rxopt.bits.rxohlim = valbool; 224333fad53SYOSHIFUJI Hideaki retv = 0; 225333fad53SYOSHIFUJI Hideaki break; 226333fad53SYOSHIFUJI Hideaki 227333fad53SYOSHIFUJI Hideaki case IPV6_RECVRTHDR: 2284c752098SYOSHIFUJI Hideaki np->rxopt.bits.srcrt = valbool; 2291da177e4SLinus Torvalds retv = 0; 2301da177e4SLinus Torvalds break; 2311da177e4SLinus Torvalds 232333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 2334c752098SYOSHIFUJI Hideaki np->rxopt.bits.osrcrt = valbool; 234333fad53SYOSHIFUJI Hideaki retv = 0; 235333fad53SYOSHIFUJI Hideaki break; 236333fad53SYOSHIFUJI Hideaki 237333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPOPTS: 2381da177e4SLinus Torvalds np->rxopt.bits.hopopts = valbool; 2391da177e4SLinus Torvalds retv = 0; 2401da177e4SLinus Torvalds break; 2411da177e4SLinus Torvalds 242333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 243333fad53SYOSHIFUJI Hideaki np->rxopt.bits.ohopopts = valbool; 244333fad53SYOSHIFUJI Hideaki retv = 0; 245333fad53SYOSHIFUJI Hideaki break; 246333fad53SYOSHIFUJI Hideaki 247333fad53SYOSHIFUJI Hideaki case IPV6_RECVDSTOPTS: 2481da177e4SLinus Torvalds np->rxopt.bits.dstopts = valbool; 2491da177e4SLinus Torvalds retv = 0; 2501da177e4SLinus Torvalds break; 2511da177e4SLinus Torvalds 252333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 253333fad53SYOSHIFUJI Hideaki np->rxopt.bits.odstopts = valbool; 254333fad53SYOSHIFUJI Hideaki retv = 0; 255333fad53SYOSHIFUJI Hideaki break; 256333fad53SYOSHIFUJI Hideaki 25741a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 258d0ee011fSRemi Denis-Courmont if (val < -1 || val > 0xff) 25941a1f8eaSYOSHIFUJI Hideaki goto e_inval; 26041a1f8eaSYOSHIFUJI Hideaki np->tclass = val; 26141a1f8eaSYOSHIFUJI Hideaki retv = 0; 26241a1f8eaSYOSHIFUJI Hideaki break; 26341a1f8eaSYOSHIFUJI Hideaki 26441a1f8eaSYOSHIFUJI Hideaki case IPV6_RECVTCLASS: 26541a1f8eaSYOSHIFUJI Hideaki np->rxopt.bits.rxtclass = valbool; 26641a1f8eaSYOSHIFUJI Hideaki retv = 0; 26741a1f8eaSYOSHIFUJI Hideaki break; 26841a1f8eaSYOSHIFUJI Hideaki 2691da177e4SLinus Torvalds case IPV6_FLOWINFO: 2701da177e4SLinus Torvalds np->rxopt.bits.rxflow = valbool; 2711da177e4SLinus Torvalds retv = 0; 2721da177e4SLinus Torvalds break; 2731da177e4SLinus Torvalds 274333fad53SYOSHIFUJI Hideaki case IPV6_HOPOPTS: 275333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 276333fad53SYOSHIFUJI Hideaki case IPV6_RTHDR: 277333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 278333fad53SYOSHIFUJI Hideaki { 279333fad53SYOSHIFUJI Hideaki struct ipv6_txoptions *opt; 280333fad53SYOSHIFUJI Hideaki if (optlen == 0) 281cb422c46SLuiz Capitulino optval = NULL; 282333fad53SYOSHIFUJI Hideaki 283333fad53SYOSHIFUJI Hideaki /* hop-by-hop / destination options are privileged option */ 284333fad53SYOSHIFUJI Hideaki retv = -EPERM; 285333fad53SYOSHIFUJI Hideaki if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW)) 286333fad53SYOSHIFUJI Hideaki break; 287333fad53SYOSHIFUJI Hideaki 288333fad53SYOSHIFUJI Hideaki retv = -EINVAL; 289333fad53SYOSHIFUJI Hideaki if (optlen & 0x7 || optlen > 8 * 255) 290333fad53SYOSHIFUJI Hideaki break; 291333fad53SYOSHIFUJI Hideaki 292333fad53SYOSHIFUJI Hideaki opt = ipv6_renew_options(sk, np->opt, optname, 293333fad53SYOSHIFUJI Hideaki (struct ipv6_opt_hdr __user *)optval, 294333fad53SYOSHIFUJI Hideaki optlen); 295333fad53SYOSHIFUJI Hideaki if (IS_ERR(opt)) { 296333fad53SYOSHIFUJI Hideaki retv = PTR_ERR(opt); 297333fad53SYOSHIFUJI Hideaki break; 298333fad53SYOSHIFUJI Hideaki } 299333fad53SYOSHIFUJI Hideaki 300333fad53SYOSHIFUJI Hideaki /* routing header option needs extra check */ 301dfee0a72SOlaf Kirch if (optname == IPV6_RTHDR && opt && opt->srcrt) { 302333fad53SYOSHIFUJI Hideaki struct ipv6_rt_hdr *rthdr = opt->srcrt; 303280a9d34SMasahide NAKAMURA switch (rthdr->type) { 30459fbb3a6SMasahide NAKAMURA #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 305280a9d34SMasahide NAKAMURA case IPV6_SRCRT_TYPE_2: 306280a9d34SMasahide NAKAMURA break; 307bb4dbf9eSYOSHIFUJI Hideaki #endif 308280a9d34SMasahide NAKAMURA default: 309333fad53SYOSHIFUJI Hideaki goto sticky_done; 310280a9d34SMasahide NAKAMURA } 311280a9d34SMasahide NAKAMURA 312333fad53SYOSHIFUJI Hideaki if ((rthdr->hdrlen & 1) || 313333fad53SYOSHIFUJI Hideaki (rthdr->hdrlen >> 1) != rthdr->segments_left) 314333fad53SYOSHIFUJI Hideaki goto sticky_done; 315333fad53SYOSHIFUJI Hideaki } 316333fad53SYOSHIFUJI Hideaki 317333fad53SYOSHIFUJI Hideaki retv = 0; 318d83d8461SArnaldo Carvalho de Melo if (inet_sk(sk)->is_icsk) { 319333fad53SYOSHIFUJI Hideaki if (opt) { 320d83d8461SArnaldo Carvalho de Melo struct inet_connection_sock *icsk = inet_csk(sk); 321333fad53SYOSHIFUJI Hideaki if (!((1 << sk->sk_state) & 322333fad53SYOSHIFUJI Hideaki (TCPF_LISTEN | TCPF_CLOSE)) 323333fad53SYOSHIFUJI Hideaki && inet_sk(sk)->daddr != LOOPBACK4_IPV6) { 324d83d8461SArnaldo Carvalho de Melo icsk->icsk_ext_hdr_len = 325d83d8461SArnaldo Carvalho de Melo opt->opt_flen + opt->opt_nflen; 326d83d8461SArnaldo Carvalho de Melo icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); 327333fad53SYOSHIFUJI Hideaki } 328333fad53SYOSHIFUJI Hideaki } 329333fad53SYOSHIFUJI Hideaki opt = xchg(&np->opt, opt); 330333fad53SYOSHIFUJI Hideaki sk_dst_reset(sk); 331333fad53SYOSHIFUJI Hideaki } else { 332333fad53SYOSHIFUJI Hideaki write_lock(&sk->sk_dst_lock); 333333fad53SYOSHIFUJI Hideaki opt = xchg(&np->opt, opt); 334333fad53SYOSHIFUJI Hideaki write_unlock(&sk->sk_dst_lock); 335333fad53SYOSHIFUJI Hideaki sk_dst_reset(sk); 336333fad53SYOSHIFUJI Hideaki } 337333fad53SYOSHIFUJI Hideaki sticky_done: 338333fad53SYOSHIFUJI Hideaki if (opt) 339333fad53SYOSHIFUJI Hideaki sock_kfree_s(sk, opt, opt->tot_len); 340333fad53SYOSHIFUJI Hideaki break; 341333fad53SYOSHIFUJI Hideaki } 342333fad53SYOSHIFUJI Hideaki 343333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTOPTIONS: 3441da177e4SLinus Torvalds { 3451da177e4SLinus Torvalds struct ipv6_txoptions *opt = NULL; 3461da177e4SLinus Torvalds struct msghdr msg; 3471da177e4SLinus Torvalds struct flowi fl; 3481da177e4SLinus Torvalds int junk; 3491da177e4SLinus Torvalds 3501da177e4SLinus Torvalds fl.fl6_flowlabel = 0; 3511da177e4SLinus Torvalds fl.oif = sk->sk_bound_dev_if; 3521da177e4SLinus Torvalds 3531da177e4SLinus Torvalds if (optlen == 0) 3541da177e4SLinus Torvalds goto update; 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds /* 1K is probably excessive 3571da177e4SLinus Torvalds * 1K is surely not enough, 2K per standard header is 16K. 3581da177e4SLinus Torvalds */ 3591da177e4SLinus Torvalds retv = -EINVAL; 3601da177e4SLinus Torvalds if (optlen > 64*1024) 3611da177e4SLinus Torvalds break; 3621da177e4SLinus Torvalds 3631da177e4SLinus Torvalds opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); 3641da177e4SLinus Torvalds retv = -ENOBUFS; 3651da177e4SLinus Torvalds if (opt == NULL) 3661da177e4SLinus Torvalds break; 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds memset(opt, 0, sizeof(*opt)); 3691da177e4SLinus Torvalds opt->tot_len = sizeof(*opt) + optlen; 3701da177e4SLinus Torvalds retv = -EFAULT; 3711da177e4SLinus Torvalds if (copy_from_user(opt+1, optval, optlen)) 3721da177e4SLinus Torvalds goto done; 3731da177e4SLinus Torvalds 3741da177e4SLinus Torvalds msg.msg_controllen = optlen; 3751da177e4SLinus Torvalds msg.msg_control = (void*)(opt+1); 3761da177e4SLinus Torvalds 37741a1f8eaSYOSHIFUJI Hideaki retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk); 3781da177e4SLinus Torvalds if (retv) 3791da177e4SLinus Torvalds goto done; 3801da177e4SLinus Torvalds update: 3811da177e4SLinus Torvalds retv = 0; 382d83d8461SArnaldo Carvalho de Melo if (inet_sk(sk)->is_icsk) { 3831da177e4SLinus Torvalds if (opt) { 384d83d8461SArnaldo Carvalho de Melo struct inet_connection_sock *icsk = inet_csk(sk); 3851da177e4SLinus Torvalds if (!((1 << sk->sk_state) & 3861da177e4SLinus Torvalds (TCPF_LISTEN | TCPF_CLOSE)) 3871da177e4SLinus Torvalds && inet_sk(sk)->daddr != LOOPBACK4_IPV6) { 388d83d8461SArnaldo Carvalho de Melo icsk->icsk_ext_hdr_len = 389d83d8461SArnaldo Carvalho de Melo opt->opt_flen + opt->opt_nflen; 390d83d8461SArnaldo Carvalho de Melo icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); 3911da177e4SLinus Torvalds } 3921da177e4SLinus Torvalds } 3931da177e4SLinus Torvalds opt = xchg(&np->opt, opt); 3941da177e4SLinus Torvalds sk_dst_reset(sk); 3951da177e4SLinus Torvalds } else { 3961da177e4SLinus Torvalds write_lock(&sk->sk_dst_lock); 3971da177e4SLinus Torvalds opt = xchg(&np->opt, opt); 3981da177e4SLinus Torvalds write_unlock(&sk->sk_dst_lock); 3991da177e4SLinus Torvalds sk_dst_reset(sk); 4001da177e4SLinus Torvalds } 4011da177e4SLinus Torvalds 4021da177e4SLinus Torvalds done: 4031da177e4SLinus Torvalds if (opt) 4041da177e4SLinus Torvalds sock_kfree_s(sk, opt, opt->tot_len); 4051da177e4SLinus Torvalds break; 4061da177e4SLinus Torvalds } 4071da177e4SLinus Torvalds case IPV6_UNICAST_HOPS: 4081da177e4SLinus Torvalds if (val > 255 || val < -1) 4091da177e4SLinus Torvalds goto e_inval; 4101da177e4SLinus Torvalds np->hop_limit = val; 4111da177e4SLinus Torvalds retv = 0; 4121da177e4SLinus Torvalds break; 4131da177e4SLinus Torvalds 4141da177e4SLinus Torvalds case IPV6_MULTICAST_HOPS: 4151da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM) 4161da177e4SLinus Torvalds goto e_inval; 4171da177e4SLinus Torvalds if (val > 255 || val < -1) 4181da177e4SLinus Torvalds goto e_inval; 4191da177e4SLinus Torvalds np->mcast_hops = val; 4201da177e4SLinus Torvalds retv = 0; 4211da177e4SLinus Torvalds break; 4221da177e4SLinus Torvalds 4231da177e4SLinus Torvalds case IPV6_MULTICAST_LOOP: 4241da177e4SLinus Torvalds np->mc_loop = valbool; 4251da177e4SLinus Torvalds retv = 0; 4261da177e4SLinus Torvalds break; 4271da177e4SLinus Torvalds 4281da177e4SLinus Torvalds case IPV6_MULTICAST_IF: 4291da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM) 4301da177e4SLinus Torvalds goto e_inval; 4314953f0fcSBrian Haley 4324953f0fcSBrian Haley if (val) { 4331da177e4SLinus Torvalds if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) 4341da177e4SLinus Torvalds goto e_inval; 4351da177e4SLinus Torvalds 4368a3edd80SDaniel Lezcano if (__dev_get_by_index(net, val) == NULL) { 4371da177e4SLinus Torvalds retv = -ENODEV; 4381da177e4SLinus Torvalds break; 4391da177e4SLinus Torvalds } 4404953f0fcSBrian Haley } 4411da177e4SLinus Torvalds np->mcast_oif = val; 4421da177e4SLinus Torvalds retv = 0; 4431da177e4SLinus Torvalds break; 4441da177e4SLinus Torvalds case IPV6_ADD_MEMBERSHIP: 4451da177e4SLinus Torvalds case IPV6_DROP_MEMBERSHIP: 4461da177e4SLinus Torvalds { 4471da177e4SLinus Torvalds struct ipv6_mreq mreq; 4481da177e4SLinus Torvalds 449a96fb49bSFlavio Leitner retv = -EPROTO; 450a96fb49bSFlavio Leitner if (inet_sk(sk)->is_icsk) 451a96fb49bSFlavio Leitner break; 452a96fb49bSFlavio Leitner 4531da177e4SLinus Torvalds retv = -EFAULT; 4541da177e4SLinus Torvalds if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) 4551da177e4SLinus Torvalds break; 4561da177e4SLinus Torvalds 4571da177e4SLinus Torvalds if (optname == IPV6_ADD_MEMBERSHIP) 4581da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); 4591da177e4SLinus Torvalds else 4601da177e4SLinus Torvalds retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); 4611da177e4SLinus Torvalds break; 4621da177e4SLinus Torvalds } 4631da177e4SLinus Torvalds case IPV6_JOIN_ANYCAST: 4641da177e4SLinus Torvalds case IPV6_LEAVE_ANYCAST: 4651da177e4SLinus Torvalds { 4661da177e4SLinus Torvalds struct ipv6_mreq mreq; 4671da177e4SLinus Torvalds 4681da177e4SLinus Torvalds if (optlen != sizeof(struct ipv6_mreq)) 4691da177e4SLinus Torvalds goto e_inval; 4701da177e4SLinus Torvalds 4711da177e4SLinus Torvalds retv = -EFAULT; 4721da177e4SLinus Torvalds if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) 4731da177e4SLinus Torvalds break; 4741da177e4SLinus Torvalds 4751da177e4SLinus Torvalds if (optname == IPV6_JOIN_ANYCAST) 4761da177e4SLinus Torvalds retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); 4771da177e4SLinus Torvalds else 4781da177e4SLinus Torvalds retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); 4791da177e4SLinus Torvalds break; 4801da177e4SLinus Torvalds } 4811da177e4SLinus Torvalds case MCAST_JOIN_GROUP: 4821da177e4SLinus Torvalds case MCAST_LEAVE_GROUP: 4831da177e4SLinus Torvalds { 4841da177e4SLinus Torvalds struct group_req greq; 4851da177e4SLinus Torvalds struct sockaddr_in6 *psin6; 4861da177e4SLinus Torvalds 4871da177e4SLinus Torvalds retv = -EFAULT; 4881da177e4SLinus Torvalds if (copy_from_user(&greq, optval, sizeof(struct group_req))) 4891da177e4SLinus Torvalds break; 4901da177e4SLinus Torvalds if (greq.gr_group.ss_family != AF_INET6) { 4911da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 4921da177e4SLinus Torvalds break; 4931da177e4SLinus Torvalds } 4941da177e4SLinus Torvalds psin6 = (struct sockaddr_in6 *)&greq.gr_group; 4951da177e4SLinus Torvalds if (optname == MCAST_JOIN_GROUP) 4961da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, greq.gr_interface, 4971da177e4SLinus Torvalds &psin6->sin6_addr); 4981da177e4SLinus Torvalds else 4991da177e4SLinus Torvalds retv = ipv6_sock_mc_drop(sk, greq.gr_interface, 5001da177e4SLinus Torvalds &psin6->sin6_addr); 5011da177e4SLinus Torvalds break; 5021da177e4SLinus Torvalds } 5031da177e4SLinus Torvalds case MCAST_JOIN_SOURCE_GROUP: 5041da177e4SLinus Torvalds case MCAST_LEAVE_SOURCE_GROUP: 5051da177e4SLinus Torvalds case MCAST_BLOCK_SOURCE: 5061da177e4SLinus Torvalds case MCAST_UNBLOCK_SOURCE: 5071da177e4SLinus Torvalds { 5081da177e4SLinus Torvalds struct group_source_req greqs; 5091da177e4SLinus Torvalds int omode, add; 5101da177e4SLinus Torvalds 5111da177e4SLinus Torvalds if (optlen != sizeof(struct group_source_req)) 5121da177e4SLinus Torvalds goto e_inval; 5131da177e4SLinus Torvalds if (copy_from_user(&greqs, optval, sizeof(greqs))) { 5141da177e4SLinus Torvalds retv = -EFAULT; 5151da177e4SLinus Torvalds break; 5161da177e4SLinus Torvalds } 5171da177e4SLinus Torvalds if (greqs.gsr_group.ss_family != AF_INET6 || 5181da177e4SLinus Torvalds greqs.gsr_source.ss_family != AF_INET6) { 5191da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 5201da177e4SLinus Torvalds break; 5211da177e4SLinus Torvalds } 5221da177e4SLinus Torvalds if (optname == MCAST_BLOCK_SOURCE) { 5231da177e4SLinus Torvalds omode = MCAST_EXCLUDE; 5241da177e4SLinus Torvalds add = 1; 5251da177e4SLinus Torvalds } else if (optname == MCAST_UNBLOCK_SOURCE) { 5261da177e4SLinus Torvalds omode = MCAST_EXCLUDE; 5271da177e4SLinus Torvalds add = 0; 5281da177e4SLinus Torvalds } else if (optname == MCAST_JOIN_SOURCE_GROUP) { 5291da177e4SLinus Torvalds struct sockaddr_in6 *psin6; 5301da177e4SLinus Torvalds 5311da177e4SLinus Torvalds psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; 5321da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, 5331da177e4SLinus Torvalds &psin6->sin6_addr); 534c9e3e8b6SDavid L Stevens /* prior join w/ different source is ok */ 535c9e3e8b6SDavid L Stevens if (retv && retv != -EADDRINUSE) 5361da177e4SLinus Torvalds break; 5371da177e4SLinus Torvalds omode = MCAST_INCLUDE; 5381da177e4SLinus Torvalds add = 1; 539c9e3e8b6SDavid L Stevens } else /* MCAST_LEAVE_SOURCE_GROUP */ { 5401da177e4SLinus Torvalds omode = MCAST_INCLUDE; 5411da177e4SLinus Torvalds add = 0; 5421da177e4SLinus Torvalds } 5431da177e4SLinus Torvalds retv = ip6_mc_source(add, omode, sk, &greqs); 5441da177e4SLinus Torvalds break; 5451da177e4SLinus Torvalds } 5461da177e4SLinus Torvalds case MCAST_MSFILTER: 5471da177e4SLinus Torvalds { 5481da177e4SLinus Torvalds extern int sysctl_mld_max_msf; 5491da177e4SLinus Torvalds struct group_filter *gsf; 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds if (optlen < GROUP_FILTER_SIZE(0)) 5521da177e4SLinus Torvalds goto e_inval; 5531da177e4SLinus Torvalds if (optlen > sysctl_optmem_max) { 5541da177e4SLinus Torvalds retv = -ENOBUFS; 5551da177e4SLinus Torvalds break; 5561da177e4SLinus Torvalds } 5578b3a7005SKris Katterjohn gsf = kmalloc(optlen,GFP_KERNEL); 558cfcabdccSStephen Hemminger if (!gsf) { 5591da177e4SLinus Torvalds retv = -ENOBUFS; 5601da177e4SLinus Torvalds break; 5611da177e4SLinus Torvalds } 5621da177e4SLinus Torvalds retv = -EFAULT; 5631da177e4SLinus Torvalds if (copy_from_user(gsf, optval, optlen)) { 5641da177e4SLinus Torvalds kfree(gsf); 5651da177e4SLinus Torvalds break; 5661da177e4SLinus Torvalds } 5671da177e4SLinus Torvalds /* numsrc >= (4G-140)/128 overflow in 32 bits */ 5681da177e4SLinus Torvalds if (gsf->gf_numsrc >= 0x1ffffffU || 5691da177e4SLinus Torvalds gsf->gf_numsrc > sysctl_mld_max_msf) { 5701da177e4SLinus Torvalds kfree(gsf); 5711da177e4SLinus Torvalds retv = -ENOBUFS; 5721da177e4SLinus Torvalds break; 5731da177e4SLinus Torvalds } 5741da177e4SLinus Torvalds if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { 5751da177e4SLinus Torvalds kfree(gsf); 5761da177e4SLinus Torvalds retv = -EINVAL; 5771da177e4SLinus Torvalds break; 5781da177e4SLinus Torvalds } 5791da177e4SLinus Torvalds retv = ip6_mc_msfilter(sk, gsf); 5801da177e4SLinus Torvalds kfree(gsf); 5811da177e4SLinus Torvalds 5821da177e4SLinus Torvalds break; 5831da177e4SLinus Torvalds } 5841da177e4SLinus Torvalds case IPV6_ROUTER_ALERT: 5851da177e4SLinus Torvalds retv = ip6_ra_control(sk, val, NULL); 5861da177e4SLinus Torvalds break; 5871da177e4SLinus Torvalds case IPV6_MTU_DISCOVER: 588628a5c56SJohn Heffner if (val<0 || val>3) 5891da177e4SLinus Torvalds goto e_inval; 5901da177e4SLinus Torvalds np->pmtudisc = val; 5911da177e4SLinus Torvalds retv = 0; 5921da177e4SLinus Torvalds break; 5931da177e4SLinus Torvalds case IPV6_MTU: 5941da177e4SLinus Torvalds if (val && val < IPV6_MIN_MTU) 5951da177e4SLinus Torvalds goto e_inval; 5961da177e4SLinus Torvalds np->frag_size = val; 5971da177e4SLinus Torvalds retv = 0; 5981da177e4SLinus Torvalds break; 5991da177e4SLinus Torvalds case IPV6_RECVERR: 6001da177e4SLinus Torvalds np->recverr = valbool; 6011da177e4SLinus Torvalds if (!val) 6021da177e4SLinus Torvalds skb_queue_purge(&sk->sk_error_queue); 6031da177e4SLinus Torvalds retv = 0; 6041da177e4SLinus Torvalds break; 6051da177e4SLinus Torvalds case IPV6_FLOWINFO_SEND: 6061da177e4SLinus Torvalds np->sndflow = valbool; 6071da177e4SLinus Torvalds retv = 0; 6081da177e4SLinus Torvalds break; 6091da177e4SLinus Torvalds case IPV6_FLOWLABEL_MGR: 6101da177e4SLinus Torvalds retv = ipv6_flowlabel_opt(sk, optval, optlen); 6111da177e4SLinus Torvalds break; 6121da177e4SLinus Torvalds case IPV6_IPSEC_POLICY: 6131da177e4SLinus Torvalds case IPV6_XFRM_POLICY: 6146fc0b4a7SHerbert Xu retv = -EPERM; 6156fc0b4a7SHerbert Xu if (!capable(CAP_NET_ADMIN)) 6166fc0b4a7SHerbert Xu break; 6171da177e4SLinus Torvalds retv = xfrm_user_policy(sk, optname, optval, optlen); 6181da177e4SLinus Torvalds break; 6191da177e4SLinus Torvalds 6207cbca67cSYOSHIFUJI Hideaki case IPV6_ADDR_PREFERENCES: 6217cbca67cSYOSHIFUJI Hideaki { 6227cbca67cSYOSHIFUJI Hideaki unsigned int pref = 0; 6237cbca67cSYOSHIFUJI Hideaki unsigned int prefmask = ~0; 6247cbca67cSYOSHIFUJI Hideaki 6257cbca67cSYOSHIFUJI Hideaki retv = -EINVAL; 6267cbca67cSYOSHIFUJI Hideaki 6277cbca67cSYOSHIFUJI Hideaki /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ 6287cbca67cSYOSHIFUJI Hideaki switch (val & (IPV6_PREFER_SRC_PUBLIC| 6297cbca67cSYOSHIFUJI Hideaki IPV6_PREFER_SRC_TMP| 6307cbca67cSYOSHIFUJI Hideaki IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { 6317cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_PUBLIC: 6327cbca67cSYOSHIFUJI Hideaki pref |= IPV6_PREFER_SRC_PUBLIC; 6337cbca67cSYOSHIFUJI Hideaki break; 6347cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_TMP: 6357cbca67cSYOSHIFUJI Hideaki pref |= IPV6_PREFER_SRC_TMP; 6367cbca67cSYOSHIFUJI Hideaki break; 6377cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_PUBTMP_DEFAULT: 6387cbca67cSYOSHIFUJI Hideaki break; 6397cbca67cSYOSHIFUJI Hideaki case 0: 6407cbca67cSYOSHIFUJI Hideaki goto pref_skip_pubtmp; 6417cbca67cSYOSHIFUJI Hideaki default: 6427cbca67cSYOSHIFUJI Hideaki goto e_inval; 6431da177e4SLinus Torvalds } 6447cbca67cSYOSHIFUJI Hideaki 6457cbca67cSYOSHIFUJI Hideaki prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| 6467cbca67cSYOSHIFUJI Hideaki IPV6_PREFER_SRC_TMP); 6477cbca67cSYOSHIFUJI Hideaki pref_skip_pubtmp: 6487cbca67cSYOSHIFUJI Hideaki 6497cbca67cSYOSHIFUJI Hideaki /* check HOME/COA conflicts */ 6507cbca67cSYOSHIFUJI Hideaki switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { 6517cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_HOME: 6527cbca67cSYOSHIFUJI Hideaki break; 6537cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_COA: 6547cbca67cSYOSHIFUJI Hideaki pref |= IPV6_PREFER_SRC_COA; 6557cbca67cSYOSHIFUJI Hideaki case 0: 6567cbca67cSYOSHIFUJI Hideaki goto pref_skip_coa; 6577cbca67cSYOSHIFUJI Hideaki default: 6587cbca67cSYOSHIFUJI Hideaki goto e_inval; 6597cbca67cSYOSHIFUJI Hideaki } 6607cbca67cSYOSHIFUJI Hideaki 6617cbca67cSYOSHIFUJI Hideaki prefmask &= ~IPV6_PREFER_SRC_COA; 6627cbca67cSYOSHIFUJI Hideaki pref_skip_coa: 6637cbca67cSYOSHIFUJI Hideaki 6647cbca67cSYOSHIFUJI Hideaki /* check CGA/NONCGA conflicts */ 6657cbca67cSYOSHIFUJI Hideaki switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { 6667cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_CGA: 6677cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_NONCGA: 6687cbca67cSYOSHIFUJI Hideaki case 0: 6697cbca67cSYOSHIFUJI Hideaki break; 6707cbca67cSYOSHIFUJI Hideaki default: 6717cbca67cSYOSHIFUJI Hideaki goto e_inval; 6727cbca67cSYOSHIFUJI Hideaki } 6737cbca67cSYOSHIFUJI Hideaki 6747cbca67cSYOSHIFUJI Hideaki np->srcprefs = (np->srcprefs & prefmask) | pref; 6757cbca67cSYOSHIFUJI Hideaki retv = 0; 6767cbca67cSYOSHIFUJI Hideaki 6777cbca67cSYOSHIFUJI Hideaki break; 6787cbca67cSYOSHIFUJI Hideaki } 6797cbca67cSYOSHIFUJI Hideaki } 6807cbca67cSYOSHIFUJI Hideaki 6811da177e4SLinus Torvalds release_sock(sk); 6821da177e4SLinus Torvalds 6831da177e4SLinus Torvalds return retv; 6841da177e4SLinus Torvalds 6851da177e4SLinus Torvalds e_inval: 6861da177e4SLinus Torvalds release_sock(sk); 6871da177e4SLinus Torvalds return -EINVAL; 6881da177e4SLinus Torvalds } 6891da177e4SLinus Torvalds 6903fdadf7dSDmitry Mishin int ipv6_setsockopt(struct sock *sk, int level, int optname, 6913fdadf7dSDmitry Mishin char __user *optval, int optlen) 6923fdadf7dSDmitry Mishin { 6933fdadf7dSDmitry Mishin int err; 6943fdadf7dSDmitry Mishin 6953fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) 6963fdadf7dSDmitry Mishin return udp_prot.setsockopt(sk, level, optname, optval, optlen); 6973fdadf7dSDmitry Mishin 6983fdadf7dSDmitry Mishin if (level != SOL_IPV6) 6993fdadf7dSDmitry Mishin return -ENOPROTOOPT; 7003fdadf7dSDmitry Mishin 7013fdadf7dSDmitry Mishin err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); 7023fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 7033fdadf7dSDmitry Mishin /* we need to exclude all possible ENOPROTOOPTs except default case */ 7043fdadf7dSDmitry Mishin if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && 7053fdadf7dSDmitry Mishin optname != IPV6_XFRM_POLICY) { 7063fdadf7dSDmitry Mishin lock_sock(sk); 7073fdadf7dSDmitry Mishin err = nf_setsockopt(sk, PF_INET6, optname, optval, 7083fdadf7dSDmitry Mishin optlen); 7093fdadf7dSDmitry Mishin release_sock(sk); 7103fdadf7dSDmitry Mishin } 7113fdadf7dSDmitry Mishin #endif 7123fdadf7dSDmitry Mishin return err; 7133fdadf7dSDmitry Mishin } 7143fdadf7dSDmitry Mishin 7157159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_setsockopt); 7163fdadf7dSDmitry Mishin 7173fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 7183fdadf7dSDmitry Mishin int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, 7193fdadf7dSDmitry Mishin char __user *optval, int optlen) 7203fdadf7dSDmitry Mishin { 7213fdadf7dSDmitry Mishin int err; 7223fdadf7dSDmitry Mishin 7233fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) { 724543d9cfeSArnaldo Carvalho de Melo if (udp_prot.compat_setsockopt != NULL) 725543d9cfeSArnaldo Carvalho de Melo return udp_prot.compat_setsockopt(sk, level, optname, 726543d9cfeSArnaldo Carvalho de Melo optval, optlen); 727543d9cfeSArnaldo Carvalho de Melo return udp_prot.setsockopt(sk, level, optname, optval, optlen); 7283fdadf7dSDmitry Mishin } 7293fdadf7dSDmitry Mishin 7303fdadf7dSDmitry Mishin if (level != SOL_IPV6) 7313fdadf7dSDmitry Mishin return -ENOPROTOOPT; 7323fdadf7dSDmitry Mishin 7333fdadf7dSDmitry Mishin err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); 7343fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 7353fdadf7dSDmitry Mishin /* we need to exclude all possible ENOPROTOOPTs except default case */ 7363fdadf7dSDmitry Mishin if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && 7373fdadf7dSDmitry Mishin optname != IPV6_XFRM_POLICY) { 7383fdadf7dSDmitry Mishin lock_sock(sk); 739543d9cfeSArnaldo Carvalho de Melo err = compat_nf_setsockopt(sk, PF_INET6, optname, 740543d9cfeSArnaldo Carvalho de Melo optval, optlen); 7413fdadf7dSDmitry Mishin release_sock(sk); 7423fdadf7dSDmitry Mishin } 7433fdadf7dSDmitry Mishin #endif 7443fdadf7dSDmitry Mishin return err; 7453fdadf7dSDmitry Mishin } 746543d9cfeSArnaldo Carvalho de Melo 747543d9cfeSArnaldo Carvalho de Melo EXPORT_SYMBOL(compat_ipv6_setsockopt); 7483fdadf7dSDmitry Mishin #endif 7493fdadf7dSDmitry Mishin 75028693079SDavid S. Miller static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, 7514c6510a7SYOSHIFUJI Hideaki int optname, char __user *optval, int len) 752333fad53SYOSHIFUJI Hideaki { 75328693079SDavid S. Miller struct ipv6_opt_hdr *hdr; 75428693079SDavid S. Miller 7554c6510a7SYOSHIFUJI Hideaki if (!opt) 756333fad53SYOSHIFUJI Hideaki return 0; 7574c6510a7SYOSHIFUJI Hideaki 7584c6510a7SYOSHIFUJI Hideaki switch(optname) { 7594c6510a7SYOSHIFUJI Hideaki case IPV6_HOPOPTS: 76028693079SDavid S. Miller hdr = opt->hopopt; 7614c6510a7SYOSHIFUJI Hideaki break; 7624c6510a7SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 7634c6510a7SYOSHIFUJI Hideaki hdr = opt->dst0opt; 7644c6510a7SYOSHIFUJI Hideaki break; 7654c6510a7SYOSHIFUJI Hideaki case IPV6_RTHDR: 7664c6510a7SYOSHIFUJI Hideaki hdr = (struct ipv6_opt_hdr *)opt->srcrt; 7674c6510a7SYOSHIFUJI Hideaki break; 7684c6510a7SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 7694c6510a7SYOSHIFUJI Hideaki hdr = opt->dst1opt; 7704c6510a7SYOSHIFUJI Hideaki break; 7714c6510a7SYOSHIFUJI Hideaki default: 7724c6510a7SYOSHIFUJI Hideaki return -EINVAL; /* should not happen */ 7734c6510a7SYOSHIFUJI Hideaki } 7744c6510a7SYOSHIFUJI Hideaki 7754c6510a7SYOSHIFUJI Hideaki if (!hdr) 7764c6510a7SYOSHIFUJI Hideaki return 0; 77728693079SDavid S. Miller 778d2b02ed9SChris Wright len = min_t(unsigned int, len, ipv6_optlen(hdr)); 779660adc6eSIlpo Järvinen if (copy_to_user(optval, hdr, len)) 780333fad53SYOSHIFUJI Hideaki return -EFAULT; 781e5268f12SYOSHIFUJI Hideaki return ipv6_optlen(hdr); 782333fad53SYOSHIFUJI Hideaki } 783333fad53SYOSHIFUJI Hideaki 7843fdadf7dSDmitry Mishin static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, 7851da177e4SLinus Torvalds char __user *optval, int __user *optlen) 7861da177e4SLinus Torvalds { 7871da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 7881da177e4SLinus Torvalds int len; 7891da177e4SLinus Torvalds int val; 7901da177e4SLinus Torvalds 7911da177e4SLinus Torvalds if (get_user(len, optlen)) 7921da177e4SLinus Torvalds return -EFAULT; 7931da177e4SLinus Torvalds switch (optname) { 7941da177e4SLinus Torvalds case IPV6_ADDRFORM: 7951da177e4SLinus Torvalds if (sk->sk_protocol != IPPROTO_UDP && 796ba4e58ecSGerrit Renker sk->sk_protocol != IPPROTO_UDPLITE && 7971da177e4SLinus Torvalds sk->sk_protocol != IPPROTO_TCP) 7981da177e4SLinus Torvalds return -EINVAL; 7991da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) 8001da177e4SLinus Torvalds return -ENOTCONN; 8011da177e4SLinus Torvalds val = sk->sk_family; 8021da177e4SLinus Torvalds break; 8031da177e4SLinus Torvalds case MCAST_MSFILTER: 8041da177e4SLinus Torvalds { 8051da177e4SLinus Torvalds struct group_filter gsf; 8061da177e4SLinus Torvalds int err; 8071da177e4SLinus Torvalds 8081da177e4SLinus Torvalds if (len < GROUP_FILTER_SIZE(0)) 8091da177e4SLinus Torvalds return -EINVAL; 8101da177e4SLinus Torvalds if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) 8111da177e4SLinus Torvalds return -EFAULT; 8121da177e4SLinus Torvalds lock_sock(sk); 8131da177e4SLinus Torvalds err = ip6_mc_msfget(sk, &gsf, 8141da177e4SLinus Torvalds (struct group_filter __user *)optval, optlen); 8151da177e4SLinus Torvalds release_sock(sk); 8161da177e4SLinus Torvalds return err; 8171da177e4SLinus Torvalds } 8181da177e4SLinus Torvalds 819333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTOPTIONS: 8201da177e4SLinus Torvalds { 8211da177e4SLinus Torvalds struct msghdr msg; 8221da177e4SLinus Torvalds struct sk_buff *skb; 8231da177e4SLinus Torvalds 8241da177e4SLinus Torvalds if (sk->sk_type != SOCK_STREAM) 8251da177e4SLinus Torvalds return -ENOPROTOOPT; 8261da177e4SLinus Torvalds 8271da177e4SLinus Torvalds msg.msg_control = optval; 8281da177e4SLinus Torvalds msg.msg_controllen = len; 8291da177e4SLinus Torvalds msg.msg_flags = 0; 8301da177e4SLinus Torvalds 8311da177e4SLinus Torvalds lock_sock(sk); 8321da177e4SLinus Torvalds skb = np->pktoptions; 8331da177e4SLinus Torvalds if (skb) 8341da177e4SLinus Torvalds atomic_inc(&skb->users); 8351da177e4SLinus Torvalds release_sock(sk); 8361da177e4SLinus Torvalds 8371da177e4SLinus Torvalds if (skb) { 8381da177e4SLinus Torvalds int err = datagram_recv_ctl(sk, &msg, skb); 8391da177e4SLinus Torvalds kfree_skb(skb); 8401da177e4SLinus Torvalds if (err) 8411da177e4SLinus Torvalds return err; 8421da177e4SLinus Torvalds } else { 8431da177e4SLinus Torvalds if (np->rxopt.bits.rxinfo) { 8441da177e4SLinus Torvalds struct in6_pktinfo src_info; 8451da177e4SLinus Torvalds src_info.ipi6_ifindex = np->mcast_oif; 8461da177e4SLinus Torvalds ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); 8471da177e4SLinus Torvalds put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); 8481da177e4SLinus Torvalds } 8491da177e4SLinus Torvalds if (np->rxopt.bits.rxhlim) { 8501da177e4SLinus Torvalds int hlim = np->mcast_hops; 8511da177e4SLinus Torvalds put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); 8521da177e4SLinus Torvalds } 853333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxoinfo) { 854333fad53SYOSHIFUJI Hideaki struct in6_pktinfo src_info; 855333fad53SYOSHIFUJI Hideaki src_info.ipi6_ifindex = np->mcast_oif; 856333fad53SYOSHIFUJI Hideaki ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); 857333fad53SYOSHIFUJI Hideaki put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); 858333fad53SYOSHIFUJI Hideaki } 859333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxohlim) { 860333fad53SYOSHIFUJI Hideaki int hlim = np->mcast_hops; 861333fad53SYOSHIFUJI Hideaki put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); 862333fad53SYOSHIFUJI Hideaki } 8631da177e4SLinus Torvalds } 8641da177e4SLinus Torvalds len -= msg.msg_controllen; 8651da177e4SLinus Torvalds return put_user(len, optlen); 8661da177e4SLinus Torvalds } 8671da177e4SLinus Torvalds case IPV6_MTU: 8681da177e4SLinus Torvalds { 8691da177e4SLinus Torvalds struct dst_entry *dst; 8701da177e4SLinus Torvalds val = 0; 8711da177e4SLinus Torvalds lock_sock(sk); 8721da177e4SLinus Torvalds dst = sk_dst_get(sk); 8731da177e4SLinus Torvalds if (dst) { 8741da177e4SLinus Torvalds val = dst_mtu(dst); 8751da177e4SLinus Torvalds dst_release(dst); 8761da177e4SLinus Torvalds } 8771da177e4SLinus Torvalds release_sock(sk); 8781da177e4SLinus Torvalds if (!val) 8791da177e4SLinus Torvalds return -ENOTCONN; 8801da177e4SLinus Torvalds break; 8811da177e4SLinus Torvalds } 8821da177e4SLinus Torvalds 8831da177e4SLinus Torvalds case IPV6_V6ONLY: 8841da177e4SLinus Torvalds val = np->ipv6only; 8851da177e4SLinus Torvalds break; 8861da177e4SLinus Torvalds 887333fad53SYOSHIFUJI Hideaki case IPV6_RECVPKTINFO: 8881da177e4SLinus Torvalds val = np->rxopt.bits.rxinfo; 8891da177e4SLinus Torvalds break; 8901da177e4SLinus Torvalds 891333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 892333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.rxoinfo; 893333fad53SYOSHIFUJI Hideaki break; 894333fad53SYOSHIFUJI Hideaki 895333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPLIMIT: 8961da177e4SLinus Torvalds val = np->rxopt.bits.rxhlim; 8971da177e4SLinus Torvalds break; 8981da177e4SLinus Torvalds 899333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 900333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.rxohlim; 901333fad53SYOSHIFUJI Hideaki break; 902333fad53SYOSHIFUJI Hideaki 903333fad53SYOSHIFUJI Hideaki case IPV6_RECVRTHDR: 9041da177e4SLinus Torvalds val = np->rxopt.bits.srcrt; 9051da177e4SLinus Torvalds break; 9061da177e4SLinus Torvalds 907333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 908333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.osrcrt; 909333fad53SYOSHIFUJI Hideaki break; 910333fad53SYOSHIFUJI Hideaki 9111da177e4SLinus Torvalds case IPV6_HOPOPTS: 912333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 913333fad53SYOSHIFUJI Hideaki case IPV6_RTHDR: 914333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 915333fad53SYOSHIFUJI Hideaki { 916333fad53SYOSHIFUJI Hideaki 917333fad53SYOSHIFUJI Hideaki lock_sock(sk); 91828693079SDavid S. Miller len = ipv6_getsockopt_sticky(sk, np->opt, 9194c6510a7SYOSHIFUJI Hideaki optname, optval, len); 920333fad53SYOSHIFUJI Hideaki release_sock(sk); 921333fad53SYOSHIFUJI Hideaki return put_user(len, optlen); 922333fad53SYOSHIFUJI Hideaki } 923333fad53SYOSHIFUJI Hideaki 924333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPOPTS: 9251da177e4SLinus Torvalds val = np->rxopt.bits.hopopts; 9261da177e4SLinus Torvalds break; 9271da177e4SLinus Torvalds 928333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 929333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.ohopopts; 930333fad53SYOSHIFUJI Hideaki break; 931333fad53SYOSHIFUJI Hideaki 932333fad53SYOSHIFUJI Hideaki case IPV6_RECVDSTOPTS: 9331da177e4SLinus Torvalds val = np->rxopt.bits.dstopts; 9341da177e4SLinus Torvalds break; 9351da177e4SLinus Torvalds 936333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 937333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.odstopts; 938333fad53SYOSHIFUJI Hideaki break; 939333fad53SYOSHIFUJI Hideaki 94041a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 94141a1f8eaSYOSHIFUJI Hideaki val = np->tclass; 942d0ee011fSRemi Denis-Courmont if (val < 0) 943d0ee011fSRemi Denis-Courmont val = 0; 94441a1f8eaSYOSHIFUJI Hideaki break; 94541a1f8eaSYOSHIFUJI Hideaki 94641a1f8eaSYOSHIFUJI Hideaki case IPV6_RECVTCLASS: 94741a1f8eaSYOSHIFUJI Hideaki val = np->rxopt.bits.rxtclass; 94841a1f8eaSYOSHIFUJI Hideaki break; 94941a1f8eaSYOSHIFUJI Hideaki 9501da177e4SLinus Torvalds case IPV6_FLOWINFO: 9511da177e4SLinus Torvalds val = np->rxopt.bits.rxflow; 9521da177e4SLinus Torvalds break; 9531da177e4SLinus Torvalds 9541da177e4SLinus Torvalds case IPV6_UNICAST_HOPS: 9551da177e4SLinus Torvalds case IPV6_MULTICAST_HOPS: 956befffe90SBrian Haley { 957befffe90SBrian Haley struct dst_entry *dst; 958befffe90SBrian Haley 959befffe90SBrian Haley if (optname == IPV6_UNICAST_HOPS) 960befffe90SBrian Haley val = np->hop_limit; 961befffe90SBrian Haley else 9621da177e4SLinus Torvalds val = np->mcast_hops; 963befffe90SBrian Haley 964befffe90SBrian Haley dst = sk_dst_get(sk); 965befffe90SBrian Haley if (dst) { 966befffe90SBrian Haley if (val < 0) 9676b75d090SYOSHIFUJI Hideaki val = ip6_dst_hoplimit(dst); 968befffe90SBrian Haley dst_release(dst); 969befffe90SBrian Haley } 970befffe90SBrian Haley if (val < 0) 971befffe90SBrian Haley val = ipv6_devconf.hop_limit; 9721da177e4SLinus Torvalds break; 973befffe90SBrian Haley } 9741da177e4SLinus Torvalds 9751da177e4SLinus Torvalds case IPV6_MULTICAST_LOOP: 9761da177e4SLinus Torvalds val = np->mc_loop; 9771da177e4SLinus Torvalds break; 9781da177e4SLinus Torvalds 9791da177e4SLinus Torvalds case IPV6_MULTICAST_IF: 9801da177e4SLinus Torvalds val = np->mcast_oif; 9811da177e4SLinus Torvalds break; 9821da177e4SLinus Torvalds 9831da177e4SLinus Torvalds case IPV6_MTU_DISCOVER: 9841da177e4SLinus Torvalds val = np->pmtudisc; 9851da177e4SLinus Torvalds break; 9861da177e4SLinus Torvalds 9871da177e4SLinus Torvalds case IPV6_RECVERR: 9881da177e4SLinus Torvalds val = np->recverr; 9891da177e4SLinus Torvalds break; 9901da177e4SLinus Torvalds 9911da177e4SLinus Torvalds case IPV6_FLOWINFO_SEND: 9921da177e4SLinus Torvalds val = np->sndflow; 9931da177e4SLinus Torvalds break; 9941da177e4SLinus Torvalds 9957cbca67cSYOSHIFUJI Hideaki case IPV6_ADDR_PREFERENCES: 9967cbca67cSYOSHIFUJI Hideaki val = 0; 9977cbca67cSYOSHIFUJI Hideaki 9987cbca67cSYOSHIFUJI Hideaki if (np->srcprefs & IPV6_PREFER_SRC_TMP) 9997cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_TMP; 10007cbca67cSYOSHIFUJI Hideaki else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) 10017cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_PUBLIC; 10027cbca67cSYOSHIFUJI Hideaki else { 10037cbca67cSYOSHIFUJI Hideaki /* XXX: should we return system default? */ 10047cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; 10057cbca67cSYOSHIFUJI Hideaki } 10067cbca67cSYOSHIFUJI Hideaki 10077cbca67cSYOSHIFUJI Hideaki if (np->srcprefs & IPV6_PREFER_SRC_COA) 10087cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_COA; 10097cbca67cSYOSHIFUJI Hideaki else 10107cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_HOME; 10117cbca67cSYOSHIFUJI Hideaki break; 10127cbca67cSYOSHIFUJI Hideaki 10131da177e4SLinus Torvalds default: 1014cf6fc4a9SWei Yongjun return -ENOPROTOOPT; 10151da177e4SLinus Torvalds } 10161da177e4SLinus Torvalds len = min_t(unsigned int, sizeof(int), len); 10171da177e4SLinus Torvalds if(put_user(len, optlen)) 10181da177e4SLinus Torvalds return -EFAULT; 10191da177e4SLinus Torvalds if(copy_to_user(optval,&val,len)) 10201da177e4SLinus Torvalds return -EFAULT; 10211da177e4SLinus Torvalds return 0; 10221da177e4SLinus Torvalds } 10231da177e4SLinus Torvalds 10243fdadf7dSDmitry Mishin int ipv6_getsockopt(struct sock *sk, int level, int optname, 10253fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 10263fdadf7dSDmitry Mishin { 10273fdadf7dSDmitry Mishin int err; 10283fdadf7dSDmitry Mishin 10293fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) 10303fdadf7dSDmitry Mishin return udp_prot.getsockopt(sk, level, optname, optval, optlen); 10313fdadf7dSDmitry Mishin 10323fdadf7dSDmitry Mishin if(level != SOL_IPV6) 10333fdadf7dSDmitry Mishin return -ENOPROTOOPT; 10343fdadf7dSDmitry Mishin 10353fdadf7dSDmitry Mishin err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); 10363fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 1037cf6fc4a9SWei Yongjun /* we need to exclude all possible ENOPROTOOPTs except default case */ 1038cf6fc4a9SWei Yongjun if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { 10393fdadf7dSDmitry Mishin int len; 10403fdadf7dSDmitry Mishin 10413fdadf7dSDmitry Mishin if (get_user(len, optlen)) 10423fdadf7dSDmitry Mishin return -EFAULT; 10433fdadf7dSDmitry Mishin 10443fdadf7dSDmitry Mishin lock_sock(sk); 10453fdadf7dSDmitry Mishin err = nf_getsockopt(sk, PF_INET6, optname, optval, 10463fdadf7dSDmitry Mishin &len); 10473fdadf7dSDmitry Mishin release_sock(sk); 10483fdadf7dSDmitry Mishin if (err >= 0) 10493fdadf7dSDmitry Mishin err = put_user(len, optlen); 10503fdadf7dSDmitry Mishin } 10513fdadf7dSDmitry Mishin #endif 10523fdadf7dSDmitry Mishin return err; 10533fdadf7dSDmitry Mishin } 10543fdadf7dSDmitry Mishin 10557159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_getsockopt); 10567159039aSYOSHIFUJI Hideaki 10573fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 10583fdadf7dSDmitry Mishin int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, 10593fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 10603fdadf7dSDmitry Mishin { 10613fdadf7dSDmitry Mishin int err; 10623fdadf7dSDmitry Mishin 10633fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) { 1064543d9cfeSArnaldo Carvalho de Melo if (udp_prot.compat_getsockopt != NULL) 1065543d9cfeSArnaldo Carvalho de Melo return udp_prot.compat_getsockopt(sk, level, optname, 1066543d9cfeSArnaldo Carvalho de Melo optval, optlen); 1067543d9cfeSArnaldo Carvalho de Melo return udp_prot.getsockopt(sk, level, optname, optval, optlen); 10683fdadf7dSDmitry Mishin } 10693fdadf7dSDmitry Mishin 10703fdadf7dSDmitry Mishin if (level != SOL_IPV6) 10713fdadf7dSDmitry Mishin return -ENOPROTOOPT; 10723fdadf7dSDmitry Mishin 10733fdadf7dSDmitry Mishin err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); 10743fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 1075cf6fc4a9SWei Yongjun /* we need to exclude all possible ENOPROTOOPTs except default case */ 1076cf6fc4a9SWei Yongjun if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { 10773fdadf7dSDmitry Mishin int len; 10783fdadf7dSDmitry Mishin 10793fdadf7dSDmitry Mishin if (get_user(len, optlen)) 10803fdadf7dSDmitry Mishin return -EFAULT; 10813fdadf7dSDmitry Mishin 10823fdadf7dSDmitry Mishin lock_sock(sk); 1083543d9cfeSArnaldo Carvalho de Melo err = compat_nf_getsockopt(sk, PF_INET6, 1084543d9cfeSArnaldo Carvalho de Melo optname, optval, &len); 10853fdadf7dSDmitry Mishin release_sock(sk); 10863fdadf7dSDmitry Mishin if (err >= 0) 10873fdadf7dSDmitry Mishin err = put_user(len, optlen); 10883fdadf7dSDmitry Mishin } 10893fdadf7dSDmitry Mishin #endif 10903fdadf7dSDmitry Mishin return err; 10913fdadf7dSDmitry Mishin } 1092543d9cfeSArnaldo Carvalho de Melo 1093543d9cfeSArnaldo Carvalho de Melo EXPORT_SYMBOL(compat_ipv6_getsockopt); 10943fdadf7dSDmitry Mishin #endif 10953fdadf7dSDmitry Mishin 1096