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 * This program is free software; you can redistribute it and/or 111da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 121da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 131da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 141da177e4SLinus Torvalds * 151da177e4SLinus Torvalds * FIXME: Make the setsockopt code POSIX compliant: That is 161da177e4SLinus Torvalds * 171da177e4SLinus Torvalds * o Truncate getsockopt returns 181da177e4SLinus Torvalds * o Return an optlen of the truncated length if need be 191da177e4SLinus Torvalds * 201da177e4SLinus Torvalds * Changes: 211da177e4SLinus Torvalds * David L Stevens <dlstevens@us.ibm.com>: 221da177e4SLinus Torvalds * - added multicast source filtering API for MLDv2 231da177e4SLinus Torvalds */ 241da177e4SLinus Torvalds 251da177e4SLinus Torvalds #include <linux/module.h> 264fc268d2SRandy Dunlap #include <linux/capability.h> 271da177e4SLinus Torvalds #include <linux/errno.h> 281da177e4SLinus Torvalds #include <linux/types.h> 291da177e4SLinus Torvalds #include <linux/socket.h> 301da177e4SLinus Torvalds #include <linux/sockios.h> 311da177e4SLinus Torvalds #include <linux/net.h> 321da177e4SLinus Torvalds #include <linux/in6.h> 337bc570c8SYOSHIFUJI Hideaki #include <linux/mroute6.h> 341da177e4SLinus Torvalds #include <linux/netdevice.h> 351da177e4SLinus Torvalds #include <linux/if_arp.h> 361da177e4SLinus Torvalds #include <linux/init.h> 371da177e4SLinus Torvalds #include <linux/sysctl.h> 381da177e4SLinus Torvalds #include <linux/netfilter.h> 395a0e3ad6STejun Heo #include <linux/slab.h> 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds #include <net/sock.h> 421da177e4SLinus Torvalds #include <net/snmp.h> 431da177e4SLinus Torvalds #include <net/ipv6.h> 441da177e4SLinus Torvalds #include <net/ndisc.h> 451da177e4SLinus Torvalds #include <net/protocol.h> 461da177e4SLinus Torvalds #include <net/transp_v6.h> 471da177e4SLinus Torvalds #include <net/ip6_route.h> 481da177e4SLinus Torvalds #include <net/addrconf.h> 491da177e4SLinus Torvalds #include <net/inet_common.h> 501da177e4SLinus Torvalds #include <net/tcp.h> 511da177e4SLinus Torvalds #include <net/udp.h> 52ba4e58ecSGerrit Renker #include <net/udplite.h> 531da177e4SLinus Torvalds #include <net/xfrm.h> 54dae50295SDavid L Stevens #include <net/compat.h> 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds #include <asm/uaccess.h> 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds struct ip6_ra_chain *ip6_ra_chain; 591da177e4SLinus Torvalds DEFINE_RWLOCK(ip6_ra_lock); 601da177e4SLinus Torvalds 61725a8ff0SDenis V. Lunev int ip6_ra_control(struct sock *sk, int sel) 621da177e4SLinus Torvalds { 631da177e4SLinus Torvalds struct ip6_ra_chain *ra, *new_ra, **rap; 641da177e4SLinus Torvalds 651da177e4SLinus Torvalds /* RA packet may be delivered ONLY to IPPROTO_RAW socket */ 66c720c7e8SEric Dumazet if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num != IPPROTO_RAW) 671717699cSYOSHIFUJI Hideaki return -ENOPROTOOPT; 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds write_lock_bh(&ip6_ra_lock); 721da177e4SLinus Torvalds for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) { 731da177e4SLinus Torvalds if (ra->sk == sk) { 741da177e4SLinus Torvalds if (sel>=0) { 751da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 761da177e4SLinus Torvalds kfree(new_ra); 771da177e4SLinus Torvalds return -EADDRINUSE; 781da177e4SLinus Torvalds } 791da177e4SLinus Torvalds 801da177e4SLinus Torvalds *rap = ra->next; 811da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 821da177e4SLinus Torvalds 831da177e4SLinus Torvalds sock_put(sk); 841da177e4SLinus Torvalds kfree(ra); 851da177e4SLinus Torvalds return 0; 861da177e4SLinus Torvalds } 871da177e4SLinus Torvalds } 881da177e4SLinus Torvalds if (new_ra == NULL) { 891da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 901da177e4SLinus Torvalds return -ENOBUFS; 911da177e4SLinus Torvalds } 921da177e4SLinus Torvalds new_ra->sk = sk; 931da177e4SLinus Torvalds new_ra->sel = sel; 941da177e4SLinus Torvalds new_ra->next = ra; 951da177e4SLinus Torvalds *rap = new_ra; 961da177e4SLinus Torvalds sock_hold(sk); 971da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 981da177e4SLinus Torvalds return 0; 991da177e4SLinus Torvalds } 1001da177e4SLinus Torvalds 101e7712f1aSYOSHIFUJI Hideaki static 102e7712f1aSYOSHIFUJI Hideaki struct ipv6_txoptions *ipv6_update_options(struct sock *sk, 103e7712f1aSYOSHIFUJI Hideaki struct ipv6_txoptions *opt) 104e7712f1aSYOSHIFUJI Hideaki { 105e7712f1aSYOSHIFUJI Hideaki if (inet_sk(sk)->is_icsk) { 106e7712f1aSYOSHIFUJI Hideaki if (opt && 107e7712f1aSYOSHIFUJI Hideaki !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) && 108c720c7e8SEric Dumazet inet_sk(sk)->inet_daddr != LOOPBACK4_IPV6) { 109e7712f1aSYOSHIFUJI Hideaki struct inet_connection_sock *icsk = inet_csk(sk); 110e7712f1aSYOSHIFUJI Hideaki icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen; 111e7712f1aSYOSHIFUJI Hideaki icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); 112e7712f1aSYOSHIFUJI Hideaki } 113e7712f1aSYOSHIFUJI Hideaki opt = xchg(&inet6_sk(sk)->opt, opt); 114e7712f1aSYOSHIFUJI Hideaki } else { 115b6c6712aSEric Dumazet spin_lock(&sk->sk_dst_lock); 116e7712f1aSYOSHIFUJI Hideaki opt = xchg(&inet6_sk(sk)->opt, opt); 117b6c6712aSEric Dumazet spin_unlock(&sk->sk_dst_lock); 118e7712f1aSYOSHIFUJI Hideaki } 119e7712f1aSYOSHIFUJI Hideaki sk_dst_reset(sk); 120e7712f1aSYOSHIFUJI Hideaki 121e7712f1aSYOSHIFUJI Hideaki return opt; 122e7712f1aSYOSHIFUJI Hideaki } 123e7712f1aSYOSHIFUJI Hideaki 1243fdadf7dSDmitry Mishin static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, 125b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1261da177e4SLinus Torvalds { 1271da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 1283b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(sk); 1291da177e4SLinus Torvalds int val, valbool; 1301da177e4SLinus Torvalds int retv = -ENOPROTOOPT; 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvalds if (optval == NULL) 1331da177e4SLinus Torvalds val=0; 134b2a9d7c2SYOSHIFUJI Hideaki else { 135b2a9d7c2SYOSHIFUJI Hideaki if (optlen >= sizeof(int)) { 136b2a9d7c2SYOSHIFUJI Hideaki if (get_user(val, (int __user *) optval)) 1371da177e4SLinus Torvalds return -EFAULT; 138b2a9d7c2SYOSHIFUJI Hideaki } else 139b2a9d7c2SYOSHIFUJI Hideaki val = 0; 140b2a9d7c2SYOSHIFUJI Hideaki } 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds valbool = (val!=0); 1431da177e4SLinus Torvalds 1447bc570c8SYOSHIFUJI Hideaki if (ip6_mroute_opt(optname)) 1457bc570c8SYOSHIFUJI Hideaki return ip6_mroute_setsockopt(sk, optname, optval, optlen); 1467bc570c8SYOSHIFUJI Hideaki 1471da177e4SLinus Torvalds lock_sock(sk); 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds switch (optname) { 1501da177e4SLinus Torvalds 1511da177e4SLinus Torvalds case IPV6_ADDRFORM: 152b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 153b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 1541da177e4SLinus Torvalds if (val == PF_INET) { 1551da177e4SLinus Torvalds struct ipv6_txoptions *opt; 1561da177e4SLinus Torvalds struct sk_buff *pktopt; 1571da177e4SLinus Torvalds 15849d074f4SDenis V. Lunev if (sk->sk_type == SOCK_RAW) 15949d074f4SDenis V. Lunev break; 16049d074f4SDenis V. Lunev 1619596cc82SDenis V. Lunev if (sk->sk_protocol == IPPROTO_UDP || 1629596cc82SDenis V. Lunev sk->sk_protocol == IPPROTO_UDPLITE) { 1639596cc82SDenis V. Lunev struct udp_sock *up = udp_sk(sk); 1649596cc82SDenis V. Lunev if (up->pending == AF_INET6) { 1659596cc82SDenis V. Lunev retv = -EBUSY; 1669596cc82SDenis V. Lunev break; 1679596cc82SDenis V. Lunev } 1689596cc82SDenis V. Lunev } else if (sk->sk_protocol != IPPROTO_TCP) 1691da177e4SLinus Torvalds break; 1701da177e4SLinus Torvalds 1711da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) { 1721da177e4SLinus Torvalds retv = -ENOTCONN; 1731da177e4SLinus Torvalds break; 1741da177e4SLinus Torvalds } 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds if (ipv6_only_sock(sk) || 177e773e4faSBrian Haley !ipv6_addr_v4mapped(&np->daddr)) { 1781da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 1791da177e4SLinus Torvalds break; 1801da177e4SLinus Torvalds } 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvalds fl6_free_socklist(sk); 1831da177e4SLinus Torvalds ipv6_sock_mc_close(sk); 1841da177e4SLinus Torvalds 185e6848976SArnaldo Carvalho de Melo /* 186e6848976SArnaldo Carvalho de Melo * Sock is moving from IPv6 to IPv4 (sk_prot), so 187e6848976SArnaldo Carvalho de Melo * remove it from the refcnt debug socks count in the 188e6848976SArnaldo Carvalho de Melo * original family... 189e6848976SArnaldo Carvalho de Melo */ 190e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_dec(sk); 191e6848976SArnaldo Carvalho de Melo 1921da177e4SLinus Torvalds if (sk->sk_protocol == IPPROTO_TCP) { 193d83d8461SArnaldo Carvalho de Melo struct inet_connection_sock *icsk = inet_csk(sk); 1941da177e4SLinus Torvalds local_bh_disable(); 195c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, sk->sk_prot, -1); 196c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, &tcp_prot, 1); 1971da177e4SLinus Torvalds local_bh_enable(); 1981da177e4SLinus Torvalds sk->sk_prot = &tcp_prot; 199d83d8461SArnaldo Carvalho de Melo icsk->icsk_af_ops = &ipv4_specific; 2001da177e4SLinus Torvalds sk->sk_socket->ops = &inet_stream_ops; 2011da177e4SLinus Torvalds sk->sk_family = PF_INET; 202d83d8461SArnaldo Carvalho de Melo tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); 2031da177e4SLinus Torvalds } else { 204ba4e58ecSGerrit Renker struct proto *prot = &udp_prot; 205ba4e58ecSGerrit Renker 206db8dac20SDavid S. Miller if (sk->sk_protocol == IPPROTO_UDPLITE) 207ba4e58ecSGerrit Renker prot = &udplite_prot; 2081da177e4SLinus Torvalds local_bh_disable(); 209c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, sk->sk_prot, -1); 210c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, prot, 1); 2111da177e4SLinus Torvalds local_bh_enable(); 212ba4e58ecSGerrit Renker sk->sk_prot = prot; 2131da177e4SLinus Torvalds sk->sk_socket->ops = &inet_dgram_ops; 2141da177e4SLinus Torvalds sk->sk_family = PF_INET; 2151da177e4SLinus Torvalds } 2161da177e4SLinus Torvalds opt = xchg(&np->opt, NULL); 2171da177e4SLinus Torvalds if (opt) 2181da177e4SLinus Torvalds sock_kfree_s(sk, opt, opt->tot_len); 2191da177e4SLinus Torvalds pktopt = xchg(&np->pktoptions, NULL); 2201da177e4SLinus Torvalds kfree_skb(pktopt); 2211da177e4SLinus Torvalds 2221da177e4SLinus Torvalds sk->sk_destruct = inet_sock_destruct; 223e6848976SArnaldo Carvalho de Melo /* 224e6848976SArnaldo Carvalho de Melo * ... and add it to the refcnt debug socks count 225e6848976SArnaldo Carvalho de Melo * in the new family. -acme 226e6848976SArnaldo Carvalho de Melo */ 227e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_inc(sk); 2281da177e4SLinus Torvalds module_put(THIS_MODULE); 2291da177e4SLinus Torvalds retv = 0; 2301da177e4SLinus Torvalds break; 2311da177e4SLinus Torvalds } 2321da177e4SLinus Torvalds goto e_inval; 2331da177e4SLinus Torvalds 2341da177e4SLinus Torvalds case IPV6_V6ONLY: 235b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int) || 236c720c7e8SEric Dumazet inet_sk(sk)->inet_num) 2371da177e4SLinus Torvalds goto e_inval; 2381da177e4SLinus Torvalds np->ipv6only = valbool; 2391da177e4SLinus Torvalds retv = 0; 2401da177e4SLinus Torvalds break; 2411da177e4SLinus Torvalds 242333fad53SYOSHIFUJI Hideaki case IPV6_RECVPKTINFO: 243b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 244b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2451da177e4SLinus Torvalds np->rxopt.bits.rxinfo = valbool; 2461da177e4SLinus Torvalds retv = 0; 2471da177e4SLinus Torvalds break; 2481da177e4SLinus Torvalds 249333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 250b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 251b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 252333fad53SYOSHIFUJI Hideaki np->rxopt.bits.rxoinfo = valbool; 253333fad53SYOSHIFUJI Hideaki retv = 0; 254333fad53SYOSHIFUJI Hideaki break; 255333fad53SYOSHIFUJI Hideaki 256333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPLIMIT: 257b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 258b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2591da177e4SLinus Torvalds np->rxopt.bits.rxhlim = valbool; 2601da177e4SLinus Torvalds retv = 0; 2611da177e4SLinus Torvalds break; 2621da177e4SLinus Torvalds 263333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 264b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 265b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 266333fad53SYOSHIFUJI Hideaki np->rxopt.bits.rxohlim = valbool; 267333fad53SYOSHIFUJI Hideaki retv = 0; 268333fad53SYOSHIFUJI Hideaki break; 269333fad53SYOSHIFUJI Hideaki 270333fad53SYOSHIFUJI Hideaki case IPV6_RECVRTHDR: 271b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 272b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2734c752098SYOSHIFUJI Hideaki np->rxopt.bits.srcrt = valbool; 2741da177e4SLinus Torvalds retv = 0; 2751da177e4SLinus Torvalds break; 2761da177e4SLinus Torvalds 277333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 278b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 279b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2804c752098SYOSHIFUJI Hideaki np->rxopt.bits.osrcrt = valbool; 281333fad53SYOSHIFUJI Hideaki retv = 0; 282333fad53SYOSHIFUJI Hideaki break; 283333fad53SYOSHIFUJI Hideaki 284333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPOPTS: 285b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 286b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2871da177e4SLinus Torvalds np->rxopt.bits.hopopts = valbool; 2881da177e4SLinus Torvalds retv = 0; 2891da177e4SLinus Torvalds break; 2901da177e4SLinus Torvalds 291333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 292b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 293b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 294333fad53SYOSHIFUJI Hideaki np->rxopt.bits.ohopopts = valbool; 295333fad53SYOSHIFUJI Hideaki retv = 0; 296333fad53SYOSHIFUJI Hideaki break; 297333fad53SYOSHIFUJI Hideaki 298333fad53SYOSHIFUJI Hideaki case IPV6_RECVDSTOPTS: 299b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 300b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 3011da177e4SLinus Torvalds np->rxopt.bits.dstopts = valbool; 3021da177e4SLinus Torvalds retv = 0; 3031da177e4SLinus Torvalds break; 3041da177e4SLinus Torvalds 305333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 306b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 307b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 308333fad53SYOSHIFUJI Hideaki np->rxopt.bits.odstopts = valbool; 309333fad53SYOSHIFUJI Hideaki retv = 0; 310333fad53SYOSHIFUJI Hideaki break; 311333fad53SYOSHIFUJI Hideaki 31241a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 313b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 314b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 315d0ee011fSRemi Denis-Courmont if (val < -1 || val > 0xff) 31641a1f8eaSYOSHIFUJI Hideaki goto e_inval; 31726ced1e4SGerrit Renker /* RFC 3542, 6.5: default traffic class of 0x0 */ 31826ced1e4SGerrit Renker if (val == -1) 31926ced1e4SGerrit Renker val = 0; 32041a1f8eaSYOSHIFUJI Hideaki np->tclass = val; 32141a1f8eaSYOSHIFUJI Hideaki retv = 0; 32241a1f8eaSYOSHIFUJI Hideaki break; 32341a1f8eaSYOSHIFUJI Hideaki 32441a1f8eaSYOSHIFUJI Hideaki case IPV6_RECVTCLASS: 325b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 326b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 32741a1f8eaSYOSHIFUJI Hideaki np->rxopt.bits.rxtclass = valbool; 32841a1f8eaSYOSHIFUJI Hideaki retv = 0; 32941a1f8eaSYOSHIFUJI Hideaki break; 33041a1f8eaSYOSHIFUJI Hideaki 3311da177e4SLinus Torvalds case IPV6_FLOWINFO: 332b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 333b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 3341da177e4SLinus Torvalds np->rxopt.bits.rxflow = valbool; 3351da177e4SLinus Torvalds retv = 0; 3361da177e4SLinus Torvalds break; 3371da177e4SLinus Torvalds 338793b1473SBrian Haley case IPV6_RECVPATHMTU: 339793b1473SBrian Haley if (optlen < sizeof(int)) 340793b1473SBrian Haley goto e_inval; 341793b1473SBrian Haley np->rxopt.bits.rxpmtu = valbool; 342793b1473SBrian Haley retv = 0; 343793b1473SBrian Haley break; 344793b1473SBrian Haley 3456c468622SBalazs Scheidler case IPV6_TRANSPARENT: 346b889416bSBalazs Scheidler if (!capable(CAP_NET_ADMIN)) { 347b889416bSBalazs Scheidler retv = -EPERM; 348b889416bSBalazs Scheidler break; 349b889416bSBalazs Scheidler } 3506c468622SBalazs Scheidler if (optlen < sizeof(int)) 3516c468622SBalazs Scheidler goto e_inval; 3526c468622SBalazs Scheidler /* we don't have a separate transparent bit for IPV6 we use the one in the IPv4 socket */ 3536c468622SBalazs Scheidler inet_sk(sk)->transparent = valbool; 3546c468622SBalazs Scheidler retv = 0; 3556c468622SBalazs Scheidler break; 3566c468622SBalazs Scheidler 3576c468622SBalazs Scheidler case IPV6_RECVORIGDSTADDR: 3586c468622SBalazs Scheidler if (optlen < sizeof(int)) 3596c468622SBalazs Scheidler goto e_inval; 3606c468622SBalazs Scheidler np->rxopt.bits.rxorigdstaddr = valbool; 3616c468622SBalazs Scheidler retv = 0; 3626c468622SBalazs Scheidler break; 3636c468622SBalazs Scheidler 364333fad53SYOSHIFUJI Hideaki case IPV6_HOPOPTS: 365333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 366333fad53SYOSHIFUJI Hideaki case IPV6_RTHDR: 367333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 368333fad53SYOSHIFUJI Hideaki { 369333fad53SYOSHIFUJI Hideaki struct ipv6_txoptions *opt; 370aea7427fSShan Wei 371aea7427fSShan Wei /* remove any sticky options header with a zero option 372aea7427fSShan Wei * length, per RFC3542. 373aea7427fSShan Wei */ 374333fad53SYOSHIFUJI Hideaki if (optlen == 0) 375cb422c46SLuiz Capitulino optval = NULL; 376cfb266c0SYang Hongyang else if (optval == NULL) 377cfb266c0SYang Hongyang goto e_inval; 378aea7427fSShan Wei else if (optlen < sizeof(struct ipv6_opt_hdr) || 379aea7427fSShan Wei optlen & 0x7 || optlen > 8 * 255) 380aea7427fSShan Wei goto e_inval; 381333fad53SYOSHIFUJI Hideaki 382333fad53SYOSHIFUJI Hideaki /* hop-by-hop / destination options are privileged option */ 383333fad53SYOSHIFUJI Hideaki retv = -EPERM; 384333fad53SYOSHIFUJI Hideaki if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW)) 385333fad53SYOSHIFUJI Hideaki break; 386333fad53SYOSHIFUJI Hideaki 387333fad53SYOSHIFUJI Hideaki opt = ipv6_renew_options(sk, np->opt, optname, 388333fad53SYOSHIFUJI Hideaki (struct ipv6_opt_hdr __user *)optval, 389333fad53SYOSHIFUJI Hideaki optlen); 390333fad53SYOSHIFUJI Hideaki if (IS_ERR(opt)) { 391333fad53SYOSHIFUJI Hideaki retv = PTR_ERR(opt); 392333fad53SYOSHIFUJI Hideaki break; 393333fad53SYOSHIFUJI Hideaki } 394333fad53SYOSHIFUJI Hideaki 395333fad53SYOSHIFUJI Hideaki /* routing header option needs extra check */ 3966e093d9dSBrian Haley retv = -EINVAL; 397dfee0a72SOlaf Kirch if (optname == IPV6_RTHDR && opt && opt->srcrt) { 398333fad53SYOSHIFUJI Hideaki struct ipv6_rt_hdr *rthdr = opt->srcrt; 399280a9d34SMasahide NAKAMURA switch (rthdr->type) { 40059fbb3a6SMasahide NAKAMURA #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 401280a9d34SMasahide NAKAMURA case IPV6_SRCRT_TYPE_2: 4026e093d9dSBrian Haley if (rthdr->hdrlen != 2 || 4036e093d9dSBrian Haley rthdr->segments_left != 1) 4046e093d9dSBrian Haley goto sticky_done; 4056e093d9dSBrian Haley 406280a9d34SMasahide NAKAMURA break; 407bb4dbf9eSYOSHIFUJI Hideaki #endif 408280a9d34SMasahide NAKAMURA default: 409333fad53SYOSHIFUJI Hideaki goto sticky_done; 410280a9d34SMasahide NAKAMURA } 411333fad53SYOSHIFUJI Hideaki } 412333fad53SYOSHIFUJI Hideaki 413333fad53SYOSHIFUJI Hideaki retv = 0; 414e7712f1aSYOSHIFUJI Hideaki opt = ipv6_update_options(sk, opt); 415333fad53SYOSHIFUJI Hideaki sticky_done: 416333fad53SYOSHIFUJI Hideaki if (opt) 417333fad53SYOSHIFUJI Hideaki sock_kfree_s(sk, opt, opt->tot_len); 418333fad53SYOSHIFUJI Hideaki break; 419333fad53SYOSHIFUJI Hideaki } 420333fad53SYOSHIFUJI Hideaki 421b24a2516SYang Hongyang case IPV6_PKTINFO: 422b24a2516SYang Hongyang { 423b24a2516SYang Hongyang struct in6_pktinfo pkt; 424b24a2516SYang Hongyang 425b24a2516SYang Hongyang if (optlen == 0) 426b24a2516SYang Hongyang goto e_inval; 427b24a2516SYang Hongyang else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL) 428b24a2516SYang Hongyang goto e_inval; 429b24a2516SYang Hongyang 430914d1164SIlpo Järvinen if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) { 431b24a2516SYang Hongyang retv = -EFAULT; 432b24a2516SYang Hongyang break; 433b24a2516SYang Hongyang } 434b24a2516SYang Hongyang if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if) 435b24a2516SYang Hongyang goto e_inval; 436b24a2516SYang Hongyang 437b24a2516SYang Hongyang np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex; 438b24a2516SYang Hongyang ipv6_addr_copy(&np->sticky_pktinfo.ipi6_addr, &pkt.ipi6_addr); 439b24a2516SYang Hongyang retv = 0; 440b24a2516SYang Hongyang break; 441b24a2516SYang Hongyang } 442b24a2516SYang Hongyang 443333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTOPTIONS: 4441da177e4SLinus Torvalds { 4451da177e4SLinus Torvalds struct ipv6_txoptions *opt = NULL; 4461da177e4SLinus Torvalds struct msghdr msg; 4474c9483b2SDavid S. Miller struct flowi6 fl6; 4481da177e4SLinus Torvalds int junk; 4491da177e4SLinus Torvalds 4504c9483b2SDavid S. Miller memset(&fl6, 0, sizeof(fl6)); 4514c9483b2SDavid S. Miller fl6.flowi6_oif = sk->sk_bound_dev_if; 4524c9483b2SDavid S. Miller fl6.flowi6_mark = sk->sk_mark; 4531da177e4SLinus Torvalds 4541da177e4SLinus Torvalds if (optlen == 0) 4551da177e4SLinus Torvalds goto update; 4561da177e4SLinus Torvalds 4571da177e4SLinus Torvalds /* 1K is probably excessive 4581da177e4SLinus Torvalds * 1K is surely not enough, 2K per standard header is 16K. 4591da177e4SLinus Torvalds */ 4601da177e4SLinus Torvalds retv = -EINVAL; 4611da177e4SLinus Torvalds if (optlen > 64*1024) 4621da177e4SLinus Torvalds break; 4631da177e4SLinus Torvalds 4641da177e4SLinus Torvalds opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); 4651da177e4SLinus Torvalds retv = -ENOBUFS; 4661da177e4SLinus Torvalds if (opt == NULL) 4671da177e4SLinus Torvalds break; 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds memset(opt, 0, sizeof(*opt)); 4701da177e4SLinus Torvalds opt->tot_len = sizeof(*opt) + optlen; 4711da177e4SLinus Torvalds retv = -EFAULT; 4721da177e4SLinus Torvalds if (copy_from_user(opt+1, optval, optlen)) 4731da177e4SLinus Torvalds goto done; 4741da177e4SLinus Torvalds 4751da177e4SLinus Torvalds msg.msg_controllen = optlen; 4761da177e4SLinus Torvalds msg.msg_control = (void*)(opt+1); 4771da177e4SLinus Torvalds 4784c9483b2SDavid S. Miller retv = datagram_send_ctl(net, &msg, &fl6, opt, &junk, &junk, 47913b52cd4SBrian Haley &junk); 4801da177e4SLinus Torvalds if (retv) 4811da177e4SLinus Torvalds goto done; 4821da177e4SLinus Torvalds update: 4831da177e4SLinus Torvalds retv = 0; 484e7712f1aSYOSHIFUJI Hideaki opt = ipv6_update_options(sk, opt); 4851da177e4SLinus Torvalds done: 4861da177e4SLinus Torvalds if (opt) 4871da177e4SLinus Torvalds sock_kfree_s(sk, opt, opt->tot_len); 4881da177e4SLinus Torvalds break; 4891da177e4SLinus Torvalds } 4901da177e4SLinus Torvalds case IPV6_UNICAST_HOPS: 491b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 492b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 4931da177e4SLinus Torvalds if (val > 255 || val < -1) 4941da177e4SLinus Torvalds goto e_inval; 4951da177e4SLinus Torvalds np->hop_limit = val; 4961da177e4SLinus Torvalds retv = 0; 4971da177e4SLinus Torvalds break; 4981da177e4SLinus Torvalds 4991da177e4SLinus Torvalds case IPV6_MULTICAST_HOPS: 5001da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM) 5011717699cSYOSHIFUJI Hideaki break; 502b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 503b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 5041da177e4SLinus Torvalds if (val > 255 || val < -1) 5051da177e4SLinus Torvalds goto e_inval; 5061da177e4SLinus Torvalds np->mcast_hops = val; 5071da177e4SLinus Torvalds retv = 0; 5081da177e4SLinus Torvalds break; 5091da177e4SLinus Torvalds 5101da177e4SLinus Torvalds case IPV6_MULTICAST_LOOP: 511b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 512b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 51328d44882SYOSHIFUJI Hideaki if (val != valbool) 51428d44882SYOSHIFUJI Hideaki goto e_inval; 5151da177e4SLinus Torvalds np->mc_loop = valbool; 5161da177e4SLinus Torvalds retv = 0; 5171da177e4SLinus Torvalds break; 5181da177e4SLinus Torvalds 5191da177e4SLinus Torvalds case IPV6_MULTICAST_IF: 5201da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM) 5211717699cSYOSHIFUJI Hideaki break; 522b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 523b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 5244953f0fcSBrian Haley 5254953f0fcSBrian Haley if (val) { 52655b80503SEric Dumazet struct net_device *dev; 52755b80503SEric Dumazet 5281da177e4SLinus Torvalds if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) 5291da177e4SLinus Torvalds goto e_inval; 5301da177e4SLinus Torvalds 53155b80503SEric Dumazet dev = dev_get_by_index(net, val); 53255b80503SEric Dumazet if (!dev) { 5331da177e4SLinus Torvalds retv = -ENODEV; 5341da177e4SLinus Torvalds break; 5351da177e4SLinus Torvalds } 53655b80503SEric Dumazet dev_put(dev); 5374953f0fcSBrian Haley } 5381da177e4SLinus Torvalds np->mcast_oif = val; 5391da177e4SLinus Torvalds retv = 0; 5401da177e4SLinus Torvalds break; 5411da177e4SLinus Torvalds case IPV6_ADD_MEMBERSHIP: 5421da177e4SLinus Torvalds case IPV6_DROP_MEMBERSHIP: 5431da177e4SLinus Torvalds { 5441da177e4SLinus Torvalds struct ipv6_mreq mreq; 5451da177e4SLinus Torvalds 546a28398baSWang Chen if (optlen < sizeof(struct ipv6_mreq)) 547a28398baSWang Chen goto e_inval; 548a28398baSWang Chen 549a96fb49bSFlavio Leitner retv = -EPROTO; 550a96fb49bSFlavio Leitner if (inet_sk(sk)->is_icsk) 551a96fb49bSFlavio Leitner break; 552a96fb49bSFlavio Leitner 5531da177e4SLinus Torvalds retv = -EFAULT; 5541da177e4SLinus Torvalds if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) 5551da177e4SLinus Torvalds break; 5561da177e4SLinus Torvalds 5571da177e4SLinus Torvalds if (optname == IPV6_ADD_MEMBERSHIP) 5581da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); 5591da177e4SLinus Torvalds else 5601da177e4SLinus Torvalds retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); 5611da177e4SLinus Torvalds break; 5621da177e4SLinus Torvalds } 5631da177e4SLinus Torvalds case IPV6_JOIN_ANYCAST: 5641da177e4SLinus Torvalds case IPV6_LEAVE_ANYCAST: 5651da177e4SLinus Torvalds { 5661da177e4SLinus Torvalds struct ipv6_mreq mreq; 5671da177e4SLinus Torvalds 568a28398baSWang Chen if (optlen < sizeof(struct ipv6_mreq)) 5691da177e4SLinus Torvalds goto e_inval; 5701da177e4SLinus Torvalds 5711da177e4SLinus Torvalds retv = -EFAULT; 5721da177e4SLinus Torvalds if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) 5731da177e4SLinus Torvalds break; 5741da177e4SLinus Torvalds 5751da177e4SLinus Torvalds if (optname == IPV6_JOIN_ANYCAST) 5761da177e4SLinus Torvalds retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); 5771da177e4SLinus Torvalds else 5781da177e4SLinus Torvalds retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); 5791da177e4SLinus Torvalds break; 5801da177e4SLinus Torvalds } 5811da177e4SLinus Torvalds case MCAST_JOIN_GROUP: 5821da177e4SLinus Torvalds case MCAST_LEAVE_GROUP: 5831da177e4SLinus Torvalds { 5841da177e4SLinus Torvalds struct group_req greq; 5851da177e4SLinus Torvalds struct sockaddr_in6 *psin6; 5861da177e4SLinus Torvalds 587a28398baSWang Chen if (optlen < sizeof(struct group_req)) 588a28398baSWang Chen goto e_inval; 589a28398baSWang Chen 5901da177e4SLinus Torvalds retv = -EFAULT; 5911da177e4SLinus Torvalds if (copy_from_user(&greq, optval, sizeof(struct group_req))) 5921da177e4SLinus Torvalds break; 5931da177e4SLinus Torvalds if (greq.gr_group.ss_family != AF_INET6) { 5941da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 5951da177e4SLinus Torvalds break; 5961da177e4SLinus Torvalds } 5971da177e4SLinus Torvalds psin6 = (struct sockaddr_in6 *)&greq.gr_group; 5981da177e4SLinus Torvalds if (optname == MCAST_JOIN_GROUP) 5991da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, greq.gr_interface, 6001da177e4SLinus Torvalds &psin6->sin6_addr); 6011da177e4SLinus Torvalds else 6021da177e4SLinus Torvalds retv = ipv6_sock_mc_drop(sk, greq.gr_interface, 6031da177e4SLinus Torvalds &psin6->sin6_addr); 6041da177e4SLinus Torvalds break; 6051da177e4SLinus Torvalds } 6061da177e4SLinus Torvalds case MCAST_JOIN_SOURCE_GROUP: 6071da177e4SLinus Torvalds case MCAST_LEAVE_SOURCE_GROUP: 6081da177e4SLinus Torvalds case MCAST_BLOCK_SOURCE: 6091da177e4SLinus Torvalds case MCAST_UNBLOCK_SOURCE: 6101da177e4SLinus Torvalds { 6111da177e4SLinus Torvalds struct group_source_req greqs; 6121da177e4SLinus Torvalds int omode, add; 6131da177e4SLinus Torvalds 614a28398baSWang Chen if (optlen < sizeof(struct group_source_req)) 6151da177e4SLinus Torvalds goto e_inval; 6161da177e4SLinus Torvalds if (copy_from_user(&greqs, optval, sizeof(greqs))) { 6171da177e4SLinus Torvalds retv = -EFAULT; 6181da177e4SLinus Torvalds break; 6191da177e4SLinus Torvalds } 6201da177e4SLinus Torvalds if (greqs.gsr_group.ss_family != AF_INET6 || 6211da177e4SLinus Torvalds greqs.gsr_source.ss_family != AF_INET6) { 6221da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 6231da177e4SLinus Torvalds break; 6241da177e4SLinus Torvalds } 6251da177e4SLinus Torvalds if (optname == MCAST_BLOCK_SOURCE) { 6261da177e4SLinus Torvalds omode = MCAST_EXCLUDE; 6271da177e4SLinus Torvalds add = 1; 6281da177e4SLinus Torvalds } else if (optname == MCAST_UNBLOCK_SOURCE) { 6291da177e4SLinus Torvalds omode = MCAST_EXCLUDE; 6301da177e4SLinus Torvalds add = 0; 6311da177e4SLinus Torvalds } else if (optname == MCAST_JOIN_SOURCE_GROUP) { 6321da177e4SLinus Torvalds struct sockaddr_in6 *psin6; 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; 6351da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, 6361da177e4SLinus Torvalds &psin6->sin6_addr); 637c9e3e8b6SDavid L Stevens /* prior join w/ different source is ok */ 638c9e3e8b6SDavid L Stevens if (retv && retv != -EADDRINUSE) 6391da177e4SLinus Torvalds break; 6401da177e4SLinus Torvalds omode = MCAST_INCLUDE; 6411da177e4SLinus Torvalds add = 1; 642c9e3e8b6SDavid L Stevens } else /* MCAST_LEAVE_SOURCE_GROUP */ { 6431da177e4SLinus Torvalds omode = MCAST_INCLUDE; 6441da177e4SLinus Torvalds add = 0; 6451da177e4SLinus Torvalds } 6461da177e4SLinus Torvalds retv = ip6_mc_source(add, omode, sk, &greqs); 6471da177e4SLinus Torvalds break; 6481da177e4SLinus Torvalds } 6491da177e4SLinus Torvalds case MCAST_MSFILTER: 6501da177e4SLinus Torvalds { 6511da177e4SLinus Torvalds extern int sysctl_mld_max_msf; 6521da177e4SLinus Torvalds struct group_filter *gsf; 6531da177e4SLinus Torvalds 6541da177e4SLinus Torvalds if (optlen < GROUP_FILTER_SIZE(0)) 6551da177e4SLinus Torvalds goto e_inval; 6561da177e4SLinus Torvalds if (optlen > sysctl_optmem_max) { 6571da177e4SLinus Torvalds retv = -ENOBUFS; 6581da177e4SLinus Torvalds break; 6591da177e4SLinus Torvalds } 6608b3a7005SKris Katterjohn gsf = kmalloc(optlen,GFP_KERNEL); 661cfcabdccSStephen Hemminger if (!gsf) { 6621da177e4SLinus Torvalds retv = -ENOBUFS; 6631da177e4SLinus Torvalds break; 6641da177e4SLinus Torvalds } 6651da177e4SLinus Torvalds retv = -EFAULT; 6661da177e4SLinus Torvalds if (copy_from_user(gsf, optval, optlen)) { 6671da177e4SLinus Torvalds kfree(gsf); 6681da177e4SLinus Torvalds break; 6691da177e4SLinus Torvalds } 6701da177e4SLinus Torvalds /* numsrc >= (4G-140)/128 overflow in 32 bits */ 6711da177e4SLinus Torvalds if (gsf->gf_numsrc >= 0x1ffffffU || 6721da177e4SLinus Torvalds gsf->gf_numsrc > sysctl_mld_max_msf) { 6731da177e4SLinus Torvalds kfree(gsf); 6741da177e4SLinus Torvalds retv = -ENOBUFS; 6751da177e4SLinus Torvalds break; 6761da177e4SLinus Torvalds } 6771da177e4SLinus Torvalds if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { 6781da177e4SLinus Torvalds kfree(gsf); 6791da177e4SLinus Torvalds retv = -EINVAL; 6801da177e4SLinus Torvalds break; 6811da177e4SLinus Torvalds } 6821da177e4SLinus Torvalds retv = ip6_mc_msfilter(sk, gsf); 6831da177e4SLinus Torvalds kfree(gsf); 6841da177e4SLinus Torvalds 6851da177e4SLinus Torvalds break; 6861da177e4SLinus Torvalds } 6871da177e4SLinus Torvalds case IPV6_ROUTER_ALERT: 688b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 689b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 690725a8ff0SDenis V. Lunev retv = ip6_ra_control(sk, val); 6911da177e4SLinus Torvalds break; 6921da177e4SLinus Torvalds case IPV6_MTU_DISCOVER: 693b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 694b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 6950eae750eSJohn Dykstra if (val < IP_PMTUDISC_DONT || val > IP_PMTUDISC_PROBE) 6961da177e4SLinus Torvalds goto e_inval; 6971da177e4SLinus Torvalds np->pmtudisc = val; 6981da177e4SLinus Torvalds retv = 0; 6991da177e4SLinus Torvalds break; 7001da177e4SLinus Torvalds case IPV6_MTU: 701b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 702b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 7031da177e4SLinus Torvalds if (val && val < IPV6_MIN_MTU) 7041da177e4SLinus Torvalds goto e_inval; 7051da177e4SLinus Torvalds np->frag_size = val; 7061da177e4SLinus Torvalds retv = 0; 7071da177e4SLinus Torvalds break; 7081da177e4SLinus Torvalds case IPV6_RECVERR: 709b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 710b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 7111da177e4SLinus Torvalds np->recverr = valbool; 7121da177e4SLinus Torvalds if (!val) 7131da177e4SLinus Torvalds skb_queue_purge(&sk->sk_error_queue); 7141da177e4SLinus Torvalds retv = 0; 7151da177e4SLinus Torvalds break; 7161da177e4SLinus Torvalds case IPV6_FLOWINFO_SEND: 717b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 718b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 7191da177e4SLinus Torvalds np->sndflow = valbool; 7201da177e4SLinus Torvalds retv = 0; 7211da177e4SLinus Torvalds break; 7221da177e4SLinus Torvalds case IPV6_FLOWLABEL_MGR: 7231da177e4SLinus Torvalds retv = ipv6_flowlabel_opt(sk, optval, optlen); 7241da177e4SLinus Torvalds break; 7251da177e4SLinus Torvalds case IPV6_IPSEC_POLICY: 7261da177e4SLinus Torvalds case IPV6_XFRM_POLICY: 7276fc0b4a7SHerbert Xu retv = -EPERM; 7286fc0b4a7SHerbert Xu if (!capable(CAP_NET_ADMIN)) 7296fc0b4a7SHerbert Xu break; 7301da177e4SLinus Torvalds retv = xfrm_user_policy(sk, optname, optval, optlen); 7311da177e4SLinus Torvalds break; 7321da177e4SLinus Torvalds 7337cbca67cSYOSHIFUJI Hideaki case IPV6_ADDR_PREFERENCES: 7347cbca67cSYOSHIFUJI Hideaki { 7357cbca67cSYOSHIFUJI Hideaki unsigned int pref = 0; 7367cbca67cSYOSHIFUJI Hideaki unsigned int prefmask = ~0; 7377cbca67cSYOSHIFUJI Hideaki 738b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 739b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 740b2a9d7c2SYOSHIFUJI Hideaki 7417cbca67cSYOSHIFUJI Hideaki retv = -EINVAL; 7427cbca67cSYOSHIFUJI Hideaki 7437cbca67cSYOSHIFUJI Hideaki /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ 7447cbca67cSYOSHIFUJI Hideaki switch (val & (IPV6_PREFER_SRC_PUBLIC| 7457cbca67cSYOSHIFUJI Hideaki IPV6_PREFER_SRC_TMP| 7467cbca67cSYOSHIFUJI Hideaki IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { 7477cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_PUBLIC: 7487cbca67cSYOSHIFUJI Hideaki pref |= IPV6_PREFER_SRC_PUBLIC; 7497cbca67cSYOSHIFUJI Hideaki break; 7507cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_TMP: 7517cbca67cSYOSHIFUJI Hideaki pref |= IPV6_PREFER_SRC_TMP; 7527cbca67cSYOSHIFUJI Hideaki break; 7537cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_PUBTMP_DEFAULT: 7547cbca67cSYOSHIFUJI Hideaki break; 7557cbca67cSYOSHIFUJI Hideaki case 0: 7567cbca67cSYOSHIFUJI Hideaki goto pref_skip_pubtmp; 7577cbca67cSYOSHIFUJI Hideaki default: 7587cbca67cSYOSHIFUJI Hideaki goto e_inval; 7591da177e4SLinus Torvalds } 7607cbca67cSYOSHIFUJI Hideaki 7617cbca67cSYOSHIFUJI Hideaki prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| 7627cbca67cSYOSHIFUJI Hideaki IPV6_PREFER_SRC_TMP); 7637cbca67cSYOSHIFUJI Hideaki pref_skip_pubtmp: 7647cbca67cSYOSHIFUJI Hideaki 7657cbca67cSYOSHIFUJI Hideaki /* check HOME/COA conflicts */ 7667cbca67cSYOSHIFUJI Hideaki switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { 7677cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_HOME: 7687cbca67cSYOSHIFUJI Hideaki break; 7697cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_COA: 7707cbca67cSYOSHIFUJI Hideaki pref |= IPV6_PREFER_SRC_COA; 7717cbca67cSYOSHIFUJI Hideaki case 0: 7727cbca67cSYOSHIFUJI Hideaki goto pref_skip_coa; 7737cbca67cSYOSHIFUJI Hideaki default: 7747cbca67cSYOSHIFUJI Hideaki goto e_inval; 7757cbca67cSYOSHIFUJI Hideaki } 7767cbca67cSYOSHIFUJI Hideaki 7777cbca67cSYOSHIFUJI Hideaki prefmask &= ~IPV6_PREFER_SRC_COA; 7787cbca67cSYOSHIFUJI Hideaki pref_skip_coa: 7797cbca67cSYOSHIFUJI Hideaki 7807cbca67cSYOSHIFUJI Hideaki /* check CGA/NONCGA conflicts */ 7817cbca67cSYOSHIFUJI Hideaki switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { 7827cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_CGA: 7837cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_NONCGA: 7847cbca67cSYOSHIFUJI Hideaki case 0: 7857cbca67cSYOSHIFUJI Hideaki break; 7867cbca67cSYOSHIFUJI Hideaki default: 7877cbca67cSYOSHIFUJI Hideaki goto e_inval; 7887cbca67cSYOSHIFUJI Hideaki } 7897cbca67cSYOSHIFUJI Hideaki 7907cbca67cSYOSHIFUJI Hideaki np->srcprefs = (np->srcprefs & prefmask) | pref; 7917cbca67cSYOSHIFUJI Hideaki retv = 0; 7927cbca67cSYOSHIFUJI Hideaki 7937cbca67cSYOSHIFUJI Hideaki break; 7947cbca67cSYOSHIFUJI Hideaki } 795e802af9cSStephen Hemminger case IPV6_MINHOPCOUNT: 796e802af9cSStephen Hemminger if (optlen < sizeof(int)) 797e802af9cSStephen Hemminger goto e_inval; 798e802af9cSStephen Hemminger if (val < 0 || val > 255) 799e802af9cSStephen Hemminger goto e_inval; 800e802af9cSStephen Hemminger np->min_hopcount = val; 801793b1473SBrian Haley break; 802793b1473SBrian Haley case IPV6_DONTFRAG: 803793b1473SBrian Haley np->dontfrag = valbool; 804e802af9cSStephen Hemminger retv = 0; 805e802af9cSStephen Hemminger break; 8067cbca67cSYOSHIFUJI Hideaki } 8077cbca67cSYOSHIFUJI Hideaki 8081da177e4SLinus Torvalds release_sock(sk); 8091da177e4SLinus Torvalds 8101da177e4SLinus Torvalds return retv; 8111da177e4SLinus Torvalds 8121da177e4SLinus Torvalds e_inval: 8131da177e4SLinus Torvalds release_sock(sk); 8141da177e4SLinus Torvalds return -EINVAL; 8151da177e4SLinus Torvalds } 8161da177e4SLinus Torvalds 8173fdadf7dSDmitry Mishin int ipv6_setsockopt(struct sock *sk, int level, int optname, 818b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 8193fdadf7dSDmitry Mishin { 8203fdadf7dSDmitry Mishin int err; 8213fdadf7dSDmitry Mishin 8223fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) 8233fdadf7dSDmitry Mishin return udp_prot.setsockopt(sk, level, optname, optval, optlen); 8243fdadf7dSDmitry Mishin 8253fdadf7dSDmitry Mishin if (level != SOL_IPV6) 8263fdadf7dSDmitry Mishin return -ENOPROTOOPT; 8273fdadf7dSDmitry Mishin 8283fdadf7dSDmitry Mishin err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); 8293fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 8303fdadf7dSDmitry Mishin /* we need to exclude all possible ENOPROTOOPTs except default case */ 8313fdadf7dSDmitry Mishin if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && 8323fdadf7dSDmitry Mishin optname != IPV6_XFRM_POLICY) { 8333fdadf7dSDmitry Mishin lock_sock(sk); 8343fdadf7dSDmitry Mishin err = nf_setsockopt(sk, PF_INET6, optname, optval, 8353fdadf7dSDmitry Mishin optlen); 8363fdadf7dSDmitry Mishin release_sock(sk); 8373fdadf7dSDmitry Mishin } 8383fdadf7dSDmitry Mishin #endif 8393fdadf7dSDmitry Mishin return err; 8403fdadf7dSDmitry Mishin } 8413fdadf7dSDmitry Mishin 8427159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_setsockopt); 8433fdadf7dSDmitry Mishin 8443fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 8453fdadf7dSDmitry Mishin int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, 846b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 8473fdadf7dSDmitry Mishin { 8483fdadf7dSDmitry Mishin int err; 8493fdadf7dSDmitry Mishin 8503fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) { 851543d9cfeSArnaldo Carvalho de Melo if (udp_prot.compat_setsockopt != NULL) 852543d9cfeSArnaldo Carvalho de Melo return udp_prot.compat_setsockopt(sk, level, optname, 853543d9cfeSArnaldo Carvalho de Melo optval, optlen); 854543d9cfeSArnaldo Carvalho de Melo return udp_prot.setsockopt(sk, level, optname, optval, optlen); 8553fdadf7dSDmitry Mishin } 8563fdadf7dSDmitry Mishin 8573fdadf7dSDmitry Mishin if (level != SOL_IPV6) 8583fdadf7dSDmitry Mishin return -ENOPROTOOPT; 8593fdadf7dSDmitry Mishin 860dae50295SDavid L Stevens if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) 861dae50295SDavid L Stevens return compat_mc_setsockopt(sk, level, optname, optval, optlen, 862dae50295SDavid L Stevens ipv6_setsockopt); 863dae50295SDavid L Stevens 8643fdadf7dSDmitry Mishin err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); 8653fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 8663fdadf7dSDmitry Mishin /* we need to exclude all possible ENOPROTOOPTs except default case */ 8673fdadf7dSDmitry Mishin if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && 8683fdadf7dSDmitry Mishin optname != IPV6_XFRM_POLICY) { 8693fdadf7dSDmitry Mishin lock_sock(sk); 870543d9cfeSArnaldo Carvalho de Melo err = compat_nf_setsockopt(sk, PF_INET6, optname, 871543d9cfeSArnaldo Carvalho de Melo optval, optlen); 8723fdadf7dSDmitry Mishin release_sock(sk); 8733fdadf7dSDmitry Mishin } 8743fdadf7dSDmitry Mishin #endif 8753fdadf7dSDmitry Mishin return err; 8763fdadf7dSDmitry Mishin } 877543d9cfeSArnaldo Carvalho de Melo 878543d9cfeSArnaldo Carvalho de Melo EXPORT_SYMBOL(compat_ipv6_setsockopt); 8793fdadf7dSDmitry Mishin #endif 8803fdadf7dSDmitry Mishin 88128693079SDavid S. Miller static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, 8824c6510a7SYOSHIFUJI Hideaki int optname, char __user *optval, int len) 883333fad53SYOSHIFUJI Hideaki { 88428693079SDavid S. Miller struct ipv6_opt_hdr *hdr; 88528693079SDavid S. Miller 8864c6510a7SYOSHIFUJI Hideaki if (!opt) 887333fad53SYOSHIFUJI Hideaki return 0; 8884c6510a7SYOSHIFUJI Hideaki 8894c6510a7SYOSHIFUJI Hideaki switch(optname) { 8904c6510a7SYOSHIFUJI Hideaki case IPV6_HOPOPTS: 89128693079SDavid S. Miller hdr = opt->hopopt; 8924c6510a7SYOSHIFUJI Hideaki break; 8934c6510a7SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 8944c6510a7SYOSHIFUJI Hideaki hdr = opt->dst0opt; 8954c6510a7SYOSHIFUJI Hideaki break; 8964c6510a7SYOSHIFUJI Hideaki case IPV6_RTHDR: 8974c6510a7SYOSHIFUJI Hideaki hdr = (struct ipv6_opt_hdr *)opt->srcrt; 8984c6510a7SYOSHIFUJI Hideaki break; 8994c6510a7SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 9004c6510a7SYOSHIFUJI Hideaki hdr = opt->dst1opt; 9014c6510a7SYOSHIFUJI Hideaki break; 9024c6510a7SYOSHIFUJI Hideaki default: 9034c6510a7SYOSHIFUJI Hideaki return -EINVAL; /* should not happen */ 9044c6510a7SYOSHIFUJI Hideaki } 9054c6510a7SYOSHIFUJI Hideaki 9064c6510a7SYOSHIFUJI Hideaki if (!hdr) 9074c6510a7SYOSHIFUJI Hideaki return 0; 90828693079SDavid S. Miller 909d2b02ed9SChris Wright len = min_t(unsigned int, len, ipv6_optlen(hdr)); 910660adc6eSIlpo Järvinen if (copy_to_user(optval, hdr, len)) 911333fad53SYOSHIFUJI Hideaki return -EFAULT; 91295b496b6SYang Hongyang return len; 913333fad53SYOSHIFUJI Hideaki } 914333fad53SYOSHIFUJI Hideaki 9153fdadf7dSDmitry Mishin static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, 91698e77438SDaniel Baluta char __user *optval, int __user *optlen, unsigned flags) 9171da177e4SLinus Torvalds { 9181da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 9191da177e4SLinus Torvalds int len; 9201da177e4SLinus Torvalds int val; 9211da177e4SLinus Torvalds 9227bc570c8SYOSHIFUJI Hideaki if (ip6_mroute_opt(optname)) 9237bc570c8SYOSHIFUJI Hideaki return ip6_mroute_getsockopt(sk, optname, optval, optlen); 9247bc570c8SYOSHIFUJI Hideaki 9251da177e4SLinus Torvalds if (get_user(len, optlen)) 9261da177e4SLinus Torvalds return -EFAULT; 9271da177e4SLinus Torvalds switch (optname) { 9281da177e4SLinus Torvalds case IPV6_ADDRFORM: 9291da177e4SLinus Torvalds if (sk->sk_protocol != IPPROTO_UDP && 930ba4e58ecSGerrit Renker sk->sk_protocol != IPPROTO_UDPLITE && 9311da177e4SLinus Torvalds sk->sk_protocol != IPPROTO_TCP) 9321717699cSYOSHIFUJI Hideaki return -ENOPROTOOPT; 9331da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) 9341da177e4SLinus Torvalds return -ENOTCONN; 9351da177e4SLinus Torvalds val = sk->sk_family; 9361da177e4SLinus Torvalds break; 9371da177e4SLinus Torvalds case MCAST_MSFILTER: 9381da177e4SLinus Torvalds { 9391da177e4SLinus Torvalds struct group_filter gsf; 9401da177e4SLinus Torvalds int err; 9411da177e4SLinus Torvalds 9421da177e4SLinus Torvalds if (len < GROUP_FILTER_SIZE(0)) 9431da177e4SLinus Torvalds return -EINVAL; 9441da177e4SLinus Torvalds if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) 9451da177e4SLinus Torvalds return -EFAULT; 94620c61fbdSYOSHIFUJI Hideaki if (gsf.gf_group.ss_family != AF_INET6) 94720c61fbdSYOSHIFUJI Hideaki return -EADDRNOTAVAIL; 9481da177e4SLinus Torvalds lock_sock(sk); 9491da177e4SLinus Torvalds err = ip6_mc_msfget(sk, &gsf, 9501da177e4SLinus Torvalds (struct group_filter __user *)optval, optlen); 9511da177e4SLinus Torvalds release_sock(sk); 9521da177e4SLinus Torvalds return err; 9531da177e4SLinus Torvalds } 9541da177e4SLinus Torvalds 955333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTOPTIONS: 9561da177e4SLinus Torvalds { 9571da177e4SLinus Torvalds struct msghdr msg; 9581da177e4SLinus Torvalds struct sk_buff *skb; 9591da177e4SLinus Torvalds 9601da177e4SLinus Torvalds if (sk->sk_type != SOCK_STREAM) 9611da177e4SLinus Torvalds return -ENOPROTOOPT; 9621da177e4SLinus Torvalds 9631da177e4SLinus Torvalds msg.msg_control = optval; 9641da177e4SLinus Torvalds msg.msg_controllen = len; 96598e77438SDaniel Baluta msg.msg_flags = flags; 9661da177e4SLinus Torvalds 9671da177e4SLinus Torvalds lock_sock(sk); 9681da177e4SLinus Torvalds skb = np->pktoptions; 9691da177e4SLinus Torvalds if (skb) 9701da177e4SLinus Torvalds atomic_inc(&skb->users); 9711da177e4SLinus Torvalds release_sock(sk); 9721da177e4SLinus Torvalds 9731da177e4SLinus Torvalds if (skb) { 9741da177e4SLinus Torvalds int err = datagram_recv_ctl(sk, &msg, skb); 9751da177e4SLinus Torvalds kfree_skb(skb); 9761da177e4SLinus Torvalds if (err) 9771da177e4SLinus Torvalds return err; 9781da177e4SLinus Torvalds } else { 9791da177e4SLinus Torvalds if (np->rxopt.bits.rxinfo) { 9801da177e4SLinus Torvalds struct in6_pktinfo src_info; 981f250dcdaSYang Hongyang src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : 982f250dcdaSYang Hongyang np->sticky_pktinfo.ipi6_ifindex; 983f250dcdaSYang Hongyang np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) : 984f250dcdaSYang Hongyang ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr)); 9851da177e4SLinus Torvalds put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); 9861da177e4SLinus Torvalds } 9871da177e4SLinus Torvalds if (np->rxopt.bits.rxhlim) { 9881da177e4SLinus Torvalds int hlim = np->mcast_hops; 9891da177e4SLinus Torvalds put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); 9901da177e4SLinus Torvalds } 991333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxoinfo) { 992333fad53SYOSHIFUJI Hideaki struct in6_pktinfo src_info; 993f250dcdaSYang Hongyang src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : 994f250dcdaSYang Hongyang np->sticky_pktinfo.ipi6_ifindex; 995f250dcdaSYang Hongyang np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) : 996f250dcdaSYang Hongyang ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr)); 997333fad53SYOSHIFUJI Hideaki put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); 998333fad53SYOSHIFUJI Hideaki } 999333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxohlim) { 1000333fad53SYOSHIFUJI Hideaki int hlim = np->mcast_hops; 1001333fad53SYOSHIFUJI Hideaki put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); 1002333fad53SYOSHIFUJI Hideaki } 10031da177e4SLinus Torvalds } 10041da177e4SLinus Torvalds len -= msg.msg_controllen; 10051da177e4SLinus Torvalds return put_user(len, optlen); 10061da177e4SLinus Torvalds } 10071da177e4SLinus Torvalds case IPV6_MTU: 10081da177e4SLinus Torvalds { 10091da177e4SLinus Torvalds struct dst_entry *dst; 1010b6c6712aSEric Dumazet 10111da177e4SLinus Torvalds val = 0; 1012b6c6712aSEric Dumazet rcu_read_lock(); 1013b6c6712aSEric Dumazet dst = __sk_dst_get(sk); 1014b6c6712aSEric Dumazet if (dst) 10151da177e4SLinus Torvalds val = dst_mtu(dst); 1016b6c6712aSEric Dumazet rcu_read_unlock(); 10171da177e4SLinus Torvalds if (!val) 10181da177e4SLinus Torvalds return -ENOTCONN; 10191da177e4SLinus Torvalds break; 10201da177e4SLinus Torvalds } 10211da177e4SLinus Torvalds 10221da177e4SLinus Torvalds case IPV6_V6ONLY: 10231da177e4SLinus Torvalds val = np->ipv6only; 10241da177e4SLinus Torvalds break; 10251da177e4SLinus Torvalds 1026333fad53SYOSHIFUJI Hideaki case IPV6_RECVPKTINFO: 10271da177e4SLinus Torvalds val = np->rxopt.bits.rxinfo; 10281da177e4SLinus Torvalds break; 10291da177e4SLinus Torvalds 1030333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 1031333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.rxoinfo; 1032333fad53SYOSHIFUJI Hideaki break; 1033333fad53SYOSHIFUJI Hideaki 1034333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPLIMIT: 10351da177e4SLinus Torvalds val = np->rxopt.bits.rxhlim; 10361da177e4SLinus Torvalds break; 10371da177e4SLinus Torvalds 1038333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 1039333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.rxohlim; 1040333fad53SYOSHIFUJI Hideaki break; 1041333fad53SYOSHIFUJI Hideaki 1042333fad53SYOSHIFUJI Hideaki case IPV6_RECVRTHDR: 10431da177e4SLinus Torvalds val = np->rxopt.bits.srcrt; 10441da177e4SLinus Torvalds break; 10451da177e4SLinus Torvalds 1046333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 1047333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.osrcrt; 1048333fad53SYOSHIFUJI Hideaki break; 1049333fad53SYOSHIFUJI Hideaki 10501da177e4SLinus Torvalds case IPV6_HOPOPTS: 1051333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 1052333fad53SYOSHIFUJI Hideaki case IPV6_RTHDR: 1053333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 1054333fad53SYOSHIFUJI Hideaki { 1055333fad53SYOSHIFUJI Hideaki 1056333fad53SYOSHIFUJI Hideaki lock_sock(sk); 105728693079SDavid S. Miller len = ipv6_getsockopt_sticky(sk, np->opt, 10584c6510a7SYOSHIFUJI Hideaki optname, optval, len); 1059333fad53SYOSHIFUJI Hideaki release_sock(sk); 106005335c22SYang Hongyang /* check if ipv6_getsockopt_sticky() returns err code */ 106105335c22SYang Hongyang if (len < 0) 106205335c22SYang Hongyang return len; 1063333fad53SYOSHIFUJI Hideaki return put_user(len, optlen); 1064333fad53SYOSHIFUJI Hideaki } 1065333fad53SYOSHIFUJI Hideaki 1066333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPOPTS: 10671da177e4SLinus Torvalds val = np->rxopt.bits.hopopts; 10681da177e4SLinus Torvalds break; 10691da177e4SLinus Torvalds 1070333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 1071333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.ohopopts; 1072333fad53SYOSHIFUJI Hideaki break; 1073333fad53SYOSHIFUJI Hideaki 1074333fad53SYOSHIFUJI Hideaki case IPV6_RECVDSTOPTS: 10751da177e4SLinus Torvalds val = np->rxopt.bits.dstopts; 10761da177e4SLinus Torvalds break; 10771da177e4SLinus Torvalds 1078333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 1079333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.odstopts; 1080333fad53SYOSHIFUJI Hideaki break; 1081333fad53SYOSHIFUJI Hideaki 108241a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 108341a1f8eaSYOSHIFUJI Hideaki val = np->tclass; 108441a1f8eaSYOSHIFUJI Hideaki break; 108541a1f8eaSYOSHIFUJI Hideaki 108641a1f8eaSYOSHIFUJI Hideaki case IPV6_RECVTCLASS: 108741a1f8eaSYOSHIFUJI Hideaki val = np->rxopt.bits.rxtclass; 108841a1f8eaSYOSHIFUJI Hideaki break; 108941a1f8eaSYOSHIFUJI Hideaki 10901da177e4SLinus Torvalds case IPV6_FLOWINFO: 10911da177e4SLinus Torvalds val = np->rxopt.bits.rxflow; 10921da177e4SLinus Torvalds break; 10931da177e4SLinus Torvalds 1094793b1473SBrian Haley case IPV6_RECVPATHMTU: 1095793b1473SBrian Haley val = np->rxopt.bits.rxpmtu; 1096793b1473SBrian Haley break; 1097793b1473SBrian Haley 1098793b1473SBrian Haley case IPV6_PATHMTU: 1099793b1473SBrian Haley { 1100793b1473SBrian Haley struct dst_entry *dst; 1101793b1473SBrian Haley struct ip6_mtuinfo mtuinfo; 1102793b1473SBrian Haley 1103793b1473SBrian Haley if (len < sizeof(mtuinfo)) 1104793b1473SBrian Haley return -EINVAL; 1105793b1473SBrian Haley 1106793b1473SBrian Haley len = sizeof(mtuinfo); 1107793b1473SBrian Haley memset(&mtuinfo, 0, sizeof(mtuinfo)); 1108793b1473SBrian Haley 1109793b1473SBrian Haley rcu_read_lock(); 1110793b1473SBrian Haley dst = __sk_dst_get(sk); 1111793b1473SBrian Haley if (dst) 1112793b1473SBrian Haley mtuinfo.ip6m_mtu = dst_mtu(dst); 1113793b1473SBrian Haley rcu_read_unlock(); 1114793b1473SBrian Haley if (!mtuinfo.ip6m_mtu) 1115793b1473SBrian Haley return -ENOTCONN; 1116793b1473SBrian Haley 1117793b1473SBrian Haley if (put_user(len, optlen)) 1118793b1473SBrian Haley return -EFAULT; 1119793b1473SBrian Haley if (copy_to_user(optval, &mtuinfo, len)) 1120793b1473SBrian Haley return -EFAULT; 1121793b1473SBrian Haley 1122793b1473SBrian Haley return 0; 1123793b1473SBrian Haley break; 1124793b1473SBrian Haley } 1125793b1473SBrian Haley 11266c468622SBalazs Scheidler case IPV6_TRANSPARENT: 11276c468622SBalazs Scheidler val = inet_sk(sk)->transparent; 11286c468622SBalazs Scheidler break; 11296c468622SBalazs Scheidler 11306c468622SBalazs Scheidler case IPV6_RECVORIGDSTADDR: 11316c468622SBalazs Scheidler val = np->rxopt.bits.rxorigdstaddr; 11326c468622SBalazs Scheidler break; 11336c468622SBalazs Scheidler 11341da177e4SLinus Torvalds case IPV6_UNICAST_HOPS: 11351da177e4SLinus Torvalds case IPV6_MULTICAST_HOPS: 1136befffe90SBrian Haley { 1137befffe90SBrian Haley struct dst_entry *dst; 1138befffe90SBrian Haley 1139befffe90SBrian Haley if (optname == IPV6_UNICAST_HOPS) 1140befffe90SBrian Haley val = np->hop_limit; 1141befffe90SBrian Haley else 11421da177e4SLinus Torvalds val = np->mcast_hops; 1143befffe90SBrian Haley 1144b6c6712aSEric Dumazet if (val < 0) { 1145b6c6712aSEric Dumazet rcu_read_lock(); 1146b6c6712aSEric Dumazet dst = __sk_dst_get(sk); 1147b6c6712aSEric Dumazet if (dst) 11486b75d090SYOSHIFUJI Hideaki val = ip6_dst_hoplimit(dst); 1149b6c6712aSEric Dumazet rcu_read_unlock(); 1150befffe90SBrian Haley } 1151b6c6712aSEric Dumazet 1152befffe90SBrian Haley if (val < 0) 115353b7997fSYOSHIFUJI Hideaki val = sock_net(sk)->ipv6.devconf_all->hop_limit; 11541da177e4SLinus Torvalds break; 1155befffe90SBrian Haley } 11561da177e4SLinus Torvalds 11571da177e4SLinus Torvalds case IPV6_MULTICAST_LOOP: 11581da177e4SLinus Torvalds val = np->mc_loop; 11591da177e4SLinus Torvalds break; 11601da177e4SLinus Torvalds 11611da177e4SLinus Torvalds case IPV6_MULTICAST_IF: 11621da177e4SLinus Torvalds val = np->mcast_oif; 11631da177e4SLinus Torvalds break; 11641da177e4SLinus Torvalds 11651da177e4SLinus Torvalds case IPV6_MTU_DISCOVER: 11661da177e4SLinus Torvalds val = np->pmtudisc; 11671da177e4SLinus Torvalds break; 11681da177e4SLinus Torvalds 11691da177e4SLinus Torvalds case IPV6_RECVERR: 11701da177e4SLinus Torvalds val = np->recverr; 11711da177e4SLinus Torvalds break; 11721da177e4SLinus Torvalds 11731da177e4SLinus Torvalds case IPV6_FLOWINFO_SEND: 11741da177e4SLinus Torvalds val = np->sndflow; 11751da177e4SLinus Torvalds break; 11761da177e4SLinus Torvalds 11777cbca67cSYOSHIFUJI Hideaki case IPV6_ADDR_PREFERENCES: 11787cbca67cSYOSHIFUJI Hideaki val = 0; 11797cbca67cSYOSHIFUJI Hideaki 11807cbca67cSYOSHIFUJI Hideaki if (np->srcprefs & IPV6_PREFER_SRC_TMP) 11817cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_TMP; 11827cbca67cSYOSHIFUJI Hideaki else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) 11837cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_PUBLIC; 11847cbca67cSYOSHIFUJI Hideaki else { 11857cbca67cSYOSHIFUJI Hideaki /* XXX: should we return system default? */ 11867cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; 11877cbca67cSYOSHIFUJI Hideaki } 11887cbca67cSYOSHIFUJI Hideaki 11897cbca67cSYOSHIFUJI Hideaki if (np->srcprefs & IPV6_PREFER_SRC_COA) 11907cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_COA; 11917cbca67cSYOSHIFUJI Hideaki else 11927cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_HOME; 11937cbca67cSYOSHIFUJI Hideaki break; 11947cbca67cSYOSHIFUJI Hideaki 1195e802af9cSStephen Hemminger case IPV6_MINHOPCOUNT: 1196e802af9cSStephen Hemminger val = np->min_hopcount; 1197e802af9cSStephen Hemminger break; 1198e802af9cSStephen Hemminger 1199793b1473SBrian Haley case IPV6_DONTFRAG: 1200793b1473SBrian Haley val = np->dontfrag; 1201793b1473SBrian Haley break; 1202793b1473SBrian Haley 12031da177e4SLinus Torvalds default: 1204cf6fc4a9SWei Yongjun return -ENOPROTOOPT; 12051da177e4SLinus Torvalds } 12061da177e4SLinus Torvalds len = min_t(unsigned int, sizeof(int), len); 12071da177e4SLinus Torvalds if(put_user(len, optlen)) 12081da177e4SLinus Torvalds return -EFAULT; 12091da177e4SLinus Torvalds if(copy_to_user(optval,&val,len)) 12101da177e4SLinus Torvalds return -EFAULT; 12111da177e4SLinus Torvalds return 0; 12121da177e4SLinus Torvalds } 12131da177e4SLinus Torvalds 12143fdadf7dSDmitry Mishin int ipv6_getsockopt(struct sock *sk, int level, int optname, 12153fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 12163fdadf7dSDmitry Mishin { 12173fdadf7dSDmitry Mishin int err; 12183fdadf7dSDmitry Mishin 12193fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) 12203fdadf7dSDmitry Mishin return udp_prot.getsockopt(sk, level, optname, optval, optlen); 12213fdadf7dSDmitry Mishin 12223fdadf7dSDmitry Mishin if(level != SOL_IPV6) 12233fdadf7dSDmitry Mishin return -ENOPROTOOPT; 12243fdadf7dSDmitry Mishin 122598e77438SDaniel Baluta err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 0); 12263fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 1227cf6fc4a9SWei Yongjun /* we need to exclude all possible ENOPROTOOPTs except default case */ 1228cf6fc4a9SWei Yongjun if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { 12293fdadf7dSDmitry Mishin int len; 12303fdadf7dSDmitry Mishin 12313fdadf7dSDmitry Mishin if (get_user(len, optlen)) 12323fdadf7dSDmitry Mishin return -EFAULT; 12333fdadf7dSDmitry Mishin 12343fdadf7dSDmitry Mishin lock_sock(sk); 12353fdadf7dSDmitry Mishin err = nf_getsockopt(sk, PF_INET6, optname, optval, 12363fdadf7dSDmitry Mishin &len); 12373fdadf7dSDmitry Mishin release_sock(sk); 12383fdadf7dSDmitry Mishin if (err >= 0) 12393fdadf7dSDmitry Mishin err = put_user(len, optlen); 12403fdadf7dSDmitry Mishin } 12413fdadf7dSDmitry Mishin #endif 12423fdadf7dSDmitry Mishin return err; 12433fdadf7dSDmitry Mishin } 12443fdadf7dSDmitry Mishin 12457159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_getsockopt); 12467159039aSYOSHIFUJI Hideaki 12473fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 12483fdadf7dSDmitry Mishin int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, 12493fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 12503fdadf7dSDmitry Mishin { 12513fdadf7dSDmitry Mishin int err; 12523fdadf7dSDmitry Mishin 12533fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) { 1254543d9cfeSArnaldo Carvalho de Melo if (udp_prot.compat_getsockopt != NULL) 1255543d9cfeSArnaldo Carvalho de Melo return udp_prot.compat_getsockopt(sk, level, optname, 1256543d9cfeSArnaldo Carvalho de Melo optval, optlen); 1257543d9cfeSArnaldo Carvalho de Melo return udp_prot.getsockopt(sk, level, optname, optval, optlen); 12583fdadf7dSDmitry Mishin } 12593fdadf7dSDmitry Mishin 12603fdadf7dSDmitry Mishin if (level != SOL_IPV6) 12613fdadf7dSDmitry Mishin return -ENOPROTOOPT; 12623fdadf7dSDmitry Mishin 126380991790SPavel Emelyanov if (optname == MCAST_MSFILTER) 126480991790SPavel Emelyanov return compat_mc_getsockopt(sk, level, optname, optval, optlen, 126580991790SPavel Emelyanov ipv6_getsockopt); 126680991790SPavel Emelyanov 126798e77438SDaniel Baluta err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 126898e77438SDaniel Baluta MSG_CMSG_COMPAT); 12693fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 1270cf6fc4a9SWei Yongjun /* we need to exclude all possible ENOPROTOOPTs except default case */ 1271cf6fc4a9SWei Yongjun if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { 12723fdadf7dSDmitry Mishin int len; 12733fdadf7dSDmitry Mishin 12743fdadf7dSDmitry Mishin if (get_user(len, optlen)) 12753fdadf7dSDmitry Mishin return -EFAULT; 12763fdadf7dSDmitry Mishin 12773fdadf7dSDmitry Mishin lock_sock(sk); 1278543d9cfeSArnaldo Carvalho de Melo err = compat_nf_getsockopt(sk, PF_INET6, 1279543d9cfeSArnaldo Carvalho de Melo optname, optval, &len); 12803fdadf7dSDmitry Mishin release_sock(sk); 12813fdadf7dSDmitry Mishin if (err >= 0) 12823fdadf7dSDmitry Mishin err = put_user(len, optlen); 12833fdadf7dSDmitry Mishin } 12843fdadf7dSDmitry Mishin #endif 12853fdadf7dSDmitry Mishin return err; 12863fdadf7dSDmitry Mishin } 1287543d9cfeSArnaldo Carvalho de Melo 1288543d9cfeSArnaldo Carvalho de Melo EXPORT_SYMBOL(compat_ipv6_getsockopt); 12893fdadf7dSDmitry Mishin #endif 12903fdadf7dSDmitry Mishin 1291