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> 391da177e4SLinus Torvalds 401da177e4SLinus Torvalds #include <net/sock.h> 411da177e4SLinus Torvalds #include <net/snmp.h> 421da177e4SLinus Torvalds #include <net/ipv6.h> 431da177e4SLinus Torvalds #include <net/ndisc.h> 441da177e4SLinus Torvalds #include <net/protocol.h> 451da177e4SLinus Torvalds #include <net/transp_v6.h> 461da177e4SLinus Torvalds #include <net/ip6_route.h> 471da177e4SLinus Torvalds #include <net/addrconf.h> 481da177e4SLinus Torvalds #include <net/inet_common.h> 491da177e4SLinus Torvalds #include <net/tcp.h> 501da177e4SLinus Torvalds #include <net/udp.h> 51ba4e58ecSGerrit Renker #include <net/udplite.h> 521da177e4SLinus Torvalds #include <net/xfrm.h> 53dae50295SDavid L Stevens #include <net/compat.h> 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds #include <asm/uaccess.h> 561da177e4SLinus Torvalds 57ba89966cSEric Dumazet DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly; 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds struct ip6_ra_chain *ip6_ra_chain; 601da177e4SLinus Torvalds DEFINE_RWLOCK(ip6_ra_lock); 611da177e4SLinus Torvalds 62725a8ff0SDenis V. Lunev int ip6_ra_control(struct sock *sk, int sel) 631da177e4SLinus Torvalds { 641da177e4SLinus Torvalds struct ip6_ra_chain *ra, *new_ra, **rap; 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds /* RA packet may be delivered ONLY to IPPROTO_RAW socket */ 671da177e4SLinus Torvalds if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW) 681717699cSYOSHIFUJI Hideaki return -ENOPROTOOPT; 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds write_lock_bh(&ip6_ra_lock); 731da177e4SLinus Torvalds for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) { 741da177e4SLinus Torvalds if (ra->sk == sk) { 751da177e4SLinus Torvalds if (sel>=0) { 761da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 771da177e4SLinus Torvalds kfree(new_ra); 781da177e4SLinus Torvalds return -EADDRINUSE; 791da177e4SLinus Torvalds } 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds *rap = ra->next; 821da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds sock_put(sk); 851da177e4SLinus Torvalds kfree(ra); 861da177e4SLinus Torvalds return 0; 871da177e4SLinus Torvalds } 881da177e4SLinus Torvalds } 891da177e4SLinus Torvalds if (new_ra == NULL) { 901da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 911da177e4SLinus Torvalds return -ENOBUFS; 921da177e4SLinus Torvalds } 931da177e4SLinus Torvalds new_ra->sk = sk; 941da177e4SLinus Torvalds new_ra->sel = sel; 951da177e4SLinus Torvalds new_ra->next = ra; 961da177e4SLinus Torvalds *rap = new_ra; 971da177e4SLinus Torvalds sock_hold(sk); 981da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 991da177e4SLinus Torvalds return 0; 1001da177e4SLinus Torvalds } 1011da177e4SLinus Torvalds 102e7712f1aSYOSHIFUJI Hideaki static 103e7712f1aSYOSHIFUJI Hideaki struct ipv6_txoptions *ipv6_update_options(struct sock *sk, 104e7712f1aSYOSHIFUJI Hideaki struct ipv6_txoptions *opt) 105e7712f1aSYOSHIFUJI Hideaki { 106e7712f1aSYOSHIFUJI Hideaki if (inet_sk(sk)->is_icsk) { 107e7712f1aSYOSHIFUJI Hideaki if (opt && 108e7712f1aSYOSHIFUJI Hideaki !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) && 109e7712f1aSYOSHIFUJI Hideaki inet_sk(sk)->daddr != LOOPBACK4_IPV6) { 110e7712f1aSYOSHIFUJI Hideaki struct inet_connection_sock *icsk = inet_csk(sk); 111e7712f1aSYOSHIFUJI Hideaki icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen; 112e7712f1aSYOSHIFUJI Hideaki icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); 113e7712f1aSYOSHIFUJI Hideaki } 114e7712f1aSYOSHIFUJI Hideaki opt = xchg(&inet6_sk(sk)->opt, opt); 115e7712f1aSYOSHIFUJI Hideaki } else { 116e7712f1aSYOSHIFUJI Hideaki write_lock(&sk->sk_dst_lock); 117e7712f1aSYOSHIFUJI Hideaki opt = xchg(&inet6_sk(sk)->opt, opt); 118e7712f1aSYOSHIFUJI Hideaki write_unlock(&sk->sk_dst_lock); 119e7712f1aSYOSHIFUJI Hideaki } 120e7712f1aSYOSHIFUJI Hideaki sk_dst_reset(sk); 121e7712f1aSYOSHIFUJI Hideaki 122e7712f1aSYOSHIFUJI Hideaki return opt; 123e7712f1aSYOSHIFUJI Hideaki } 124e7712f1aSYOSHIFUJI Hideaki 1253fdadf7dSDmitry Mishin static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, 126b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1271da177e4SLinus Torvalds { 1281da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 1293b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(sk); 1301da177e4SLinus Torvalds int val, valbool; 1311da177e4SLinus Torvalds int retv = -ENOPROTOOPT; 1321da177e4SLinus Torvalds 1331da177e4SLinus Torvalds if (optval == NULL) 1341da177e4SLinus Torvalds val=0; 135b2a9d7c2SYOSHIFUJI Hideaki else { 136b2a9d7c2SYOSHIFUJI Hideaki if (optlen >= sizeof(int)) { 137b2a9d7c2SYOSHIFUJI Hideaki if (get_user(val, (int __user *) optval)) 1381da177e4SLinus Torvalds return -EFAULT; 139b2a9d7c2SYOSHIFUJI Hideaki } else 140b2a9d7c2SYOSHIFUJI Hideaki val = 0; 141b2a9d7c2SYOSHIFUJI Hideaki } 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds valbool = (val!=0); 1441da177e4SLinus Torvalds 1457bc570c8SYOSHIFUJI Hideaki if (ip6_mroute_opt(optname)) 1467bc570c8SYOSHIFUJI Hideaki return ip6_mroute_setsockopt(sk, optname, optval, optlen); 1477bc570c8SYOSHIFUJI Hideaki 1481da177e4SLinus Torvalds lock_sock(sk); 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds switch (optname) { 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvalds case IPV6_ADDRFORM: 153b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 154b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 1551da177e4SLinus Torvalds if (val == PF_INET) { 1561da177e4SLinus Torvalds struct ipv6_txoptions *opt; 1571da177e4SLinus Torvalds struct sk_buff *pktopt; 1581da177e4SLinus Torvalds 15949d074f4SDenis V. Lunev if (sk->sk_type == SOCK_RAW) 16049d074f4SDenis V. Lunev break; 16149d074f4SDenis V. Lunev 1629596cc82SDenis V. Lunev if (sk->sk_protocol == IPPROTO_UDP || 1639596cc82SDenis V. Lunev sk->sk_protocol == IPPROTO_UDPLITE) { 1649596cc82SDenis V. Lunev struct udp_sock *up = udp_sk(sk); 1659596cc82SDenis V. Lunev if (up->pending == AF_INET6) { 1669596cc82SDenis V. Lunev retv = -EBUSY; 1679596cc82SDenis V. Lunev break; 1689596cc82SDenis V. Lunev } 1699596cc82SDenis V. Lunev } else if (sk->sk_protocol != IPPROTO_TCP) 1701da177e4SLinus Torvalds break; 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) { 1731da177e4SLinus Torvalds retv = -ENOTCONN; 1741da177e4SLinus Torvalds break; 1751da177e4SLinus Torvalds } 1761da177e4SLinus Torvalds 1771da177e4SLinus Torvalds if (ipv6_only_sock(sk) || 178e773e4faSBrian Haley !ipv6_addr_v4mapped(&np->daddr)) { 1791da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 1801da177e4SLinus Torvalds break; 1811da177e4SLinus Torvalds } 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds fl6_free_socklist(sk); 1841da177e4SLinus Torvalds ipv6_sock_mc_close(sk); 1851da177e4SLinus Torvalds 186e6848976SArnaldo Carvalho de Melo /* 187e6848976SArnaldo Carvalho de Melo * Sock is moving from IPv6 to IPv4 (sk_prot), so 188e6848976SArnaldo Carvalho de Melo * remove it from the refcnt debug socks count in the 189e6848976SArnaldo Carvalho de Melo * original family... 190e6848976SArnaldo Carvalho de Melo */ 191e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_dec(sk); 192e6848976SArnaldo Carvalho de Melo 1931da177e4SLinus Torvalds if (sk->sk_protocol == IPPROTO_TCP) { 194d83d8461SArnaldo Carvalho de Melo struct inet_connection_sock *icsk = inet_csk(sk); 1951da177e4SLinus Torvalds local_bh_disable(); 196c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, sk->sk_prot, -1); 197c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, &tcp_prot, 1); 1981da177e4SLinus Torvalds local_bh_enable(); 1991da177e4SLinus Torvalds sk->sk_prot = &tcp_prot; 200d83d8461SArnaldo Carvalho de Melo icsk->icsk_af_ops = &ipv4_specific; 2011da177e4SLinus Torvalds sk->sk_socket->ops = &inet_stream_ops; 2021da177e4SLinus Torvalds sk->sk_family = PF_INET; 203d83d8461SArnaldo Carvalho de Melo tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); 2041da177e4SLinus Torvalds } else { 205ba4e58ecSGerrit Renker struct proto *prot = &udp_prot; 206ba4e58ecSGerrit Renker 207db8dac20SDavid S. Miller if (sk->sk_protocol == IPPROTO_UDPLITE) 208ba4e58ecSGerrit Renker prot = &udplite_prot; 2091da177e4SLinus Torvalds local_bh_disable(); 210c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, sk->sk_prot, -1); 211c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, prot, 1); 2121da177e4SLinus Torvalds local_bh_enable(); 213ba4e58ecSGerrit Renker sk->sk_prot = prot; 2141da177e4SLinus Torvalds sk->sk_socket->ops = &inet_dgram_ops; 2151da177e4SLinus Torvalds sk->sk_family = PF_INET; 2161da177e4SLinus Torvalds } 2171da177e4SLinus Torvalds opt = xchg(&np->opt, NULL); 2181da177e4SLinus Torvalds if (opt) 2191da177e4SLinus Torvalds sock_kfree_s(sk, opt, opt->tot_len); 2201da177e4SLinus Torvalds pktopt = xchg(&np->pktoptions, NULL); 2211da177e4SLinus Torvalds kfree_skb(pktopt); 2221da177e4SLinus Torvalds 2231da177e4SLinus Torvalds sk->sk_destruct = inet_sock_destruct; 224e6848976SArnaldo Carvalho de Melo /* 225e6848976SArnaldo Carvalho de Melo * ... and add it to the refcnt debug socks count 226e6848976SArnaldo Carvalho de Melo * in the new family. -acme 227e6848976SArnaldo Carvalho de Melo */ 228e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_inc(sk); 2291da177e4SLinus Torvalds module_put(THIS_MODULE); 2301da177e4SLinus Torvalds retv = 0; 2311da177e4SLinus Torvalds break; 2321da177e4SLinus Torvalds } 2331da177e4SLinus Torvalds goto e_inval; 2341da177e4SLinus Torvalds 2351da177e4SLinus Torvalds case IPV6_V6ONLY: 236b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int) || 237b2a9d7c2SYOSHIFUJI Hideaki inet_sk(sk)->num) 2381da177e4SLinus Torvalds goto e_inval; 2391da177e4SLinus Torvalds np->ipv6only = valbool; 2401da177e4SLinus Torvalds retv = 0; 2411da177e4SLinus Torvalds break; 2421da177e4SLinus Torvalds 243333fad53SYOSHIFUJI Hideaki case IPV6_RECVPKTINFO: 244b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 245b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2461da177e4SLinus Torvalds np->rxopt.bits.rxinfo = valbool; 2471da177e4SLinus Torvalds retv = 0; 2481da177e4SLinus Torvalds break; 2491da177e4SLinus Torvalds 250333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 251b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 252b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 253333fad53SYOSHIFUJI Hideaki np->rxopt.bits.rxoinfo = valbool; 254333fad53SYOSHIFUJI Hideaki retv = 0; 255333fad53SYOSHIFUJI Hideaki break; 256333fad53SYOSHIFUJI Hideaki 257333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPLIMIT: 258b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 259b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2601da177e4SLinus Torvalds np->rxopt.bits.rxhlim = valbool; 2611da177e4SLinus Torvalds retv = 0; 2621da177e4SLinus Torvalds break; 2631da177e4SLinus Torvalds 264333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 265b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 266b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 267333fad53SYOSHIFUJI Hideaki np->rxopt.bits.rxohlim = valbool; 268333fad53SYOSHIFUJI Hideaki retv = 0; 269333fad53SYOSHIFUJI Hideaki break; 270333fad53SYOSHIFUJI Hideaki 271333fad53SYOSHIFUJI Hideaki case IPV6_RECVRTHDR: 272b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 273b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2744c752098SYOSHIFUJI Hideaki np->rxopt.bits.srcrt = valbool; 2751da177e4SLinus Torvalds retv = 0; 2761da177e4SLinus Torvalds break; 2771da177e4SLinus Torvalds 278333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 279b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 280b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2814c752098SYOSHIFUJI Hideaki np->rxopt.bits.osrcrt = valbool; 282333fad53SYOSHIFUJI Hideaki retv = 0; 283333fad53SYOSHIFUJI Hideaki break; 284333fad53SYOSHIFUJI Hideaki 285333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPOPTS: 286b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 287b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2881da177e4SLinus Torvalds np->rxopt.bits.hopopts = valbool; 2891da177e4SLinus Torvalds retv = 0; 2901da177e4SLinus Torvalds break; 2911da177e4SLinus Torvalds 292333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 293b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 294b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 295333fad53SYOSHIFUJI Hideaki np->rxopt.bits.ohopopts = valbool; 296333fad53SYOSHIFUJI Hideaki retv = 0; 297333fad53SYOSHIFUJI Hideaki break; 298333fad53SYOSHIFUJI Hideaki 299333fad53SYOSHIFUJI Hideaki case IPV6_RECVDSTOPTS: 300b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 301b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 3021da177e4SLinus Torvalds np->rxopt.bits.dstopts = valbool; 3031da177e4SLinus Torvalds retv = 0; 3041da177e4SLinus Torvalds break; 3051da177e4SLinus Torvalds 306333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 307b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 308b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 309333fad53SYOSHIFUJI Hideaki np->rxopt.bits.odstopts = valbool; 310333fad53SYOSHIFUJI Hideaki retv = 0; 311333fad53SYOSHIFUJI Hideaki break; 312333fad53SYOSHIFUJI Hideaki 31341a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 314b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 315b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 316d0ee011fSRemi Denis-Courmont if (val < -1 || val > 0xff) 31741a1f8eaSYOSHIFUJI Hideaki goto e_inval; 31826ced1e4SGerrit Renker /* RFC 3542, 6.5: default traffic class of 0x0 */ 31926ced1e4SGerrit Renker if (val == -1) 32026ced1e4SGerrit Renker val = 0; 32141a1f8eaSYOSHIFUJI Hideaki np->tclass = val; 32241a1f8eaSYOSHIFUJI Hideaki retv = 0; 32341a1f8eaSYOSHIFUJI Hideaki break; 32441a1f8eaSYOSHIFUJI Hideaki 32541a1f8eaSYOSHIFUJI Hideaki case IPV6_RECVTCLASS: 326b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 327b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 32841a1f8eaSYOSHIFUJI Hideaki np->rxopt.bits.rxtclass = valbool; 32941a1f8eaSYOSHIFUJI Hideaki retv = 0; 33041a1f8eaSYOSHIFUJI Hideaki break; 33141a1f8eaSYOSHIFUJI Hideaki 3321da177e4SLinus Torvalds case IPV6_FLOWINFO: 333b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 334b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 3351da177e4SLinus Torvalds np->rxopt.bits.rxflow = valbool; 3361da177e4SLinus Torvalds retv = 0; 3371da177e4SLinus Torvalds break; 3381da177e4SLinus Torvalds 339333fad53SYOSHIFUJI Hideaki case IPV6_HOPOPTS: 340333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 341333fad53SYOSHIFUJI Hideaki case IPV6_RTHDR: 342333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 343333fad53SYOSHIFUJI Hideaki { 344333fad53SYOSHIFUJI Hideaki struct ipv6_txoptions *opt; 345aea7427fSShan Wei 346aea7427fSShan Wei /* remove any sticky options header with a zero option 347aea7427fSShan Wei * length, per RFC3542. 348aea7427fSShan Wei */ 349333fad53SYOSHIFUJI Hideaki if (optlen == 0) 350cb422c46SLuiz Capitulino optval = NULL; 351cfb266c0SYang Hongyang else if (optval == NULL) 352cfb266c0SYang Hongyang goto e_inval; 353aea7427fSShan Wei else if (optlen < sizeof(struct ipv6_opt_hdr) || 354aea7427fSShan Wei optlen & 0x7 || optlen > 8 * 255) 355aea7427fSShan Wei goto e_inval; 356333fad53SYOSHIFUJI Hideaki 357333fad53SYOSHIFUJI Hideaki /* hop-by-hop / destination options are privileged option */ 358333fad53SYOSHIFUJI Hideaki retv = -EPERM; 359333fad53SYOSHIFUJI Hideaki if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW)) 360333fad53SYOSHIFUJI Hideaki break; 361333fad53SYOSHIFUJI Hideaki 362333fad53SYOSHIFUJI Hideaki opt = ipv6_renew_options(sk, np->opt, optname, 363333fad53SYOSHIFUJI Hideaki (struct ipv6_opt_hdr __user *)optval, 364333fad53SYOSHIFUJI Hideaki optlen); 365333fad53SYOSHIFUJI Hideaki if (IS_ERR(opt)) { 366333fad53SYOSHIFUJI Hideaki retv = PTR_ERR(opt); 367333fad53SYOSHIFUJI Hideaki break; 368333fad53SYOSHIFUJI Hideaki } 369333fad53SYOSHIFUJI Hideaki 370333fad53SYOSHIFUJI Hideaki /* routing header option needs extra check */ 3716e093d9dSBrian Haley retv = -EINVAL; 372dfee0a72SOlaf Kirch if (optname == IPV6_RTHDR && opt && opt->srcrt) { 373333fad53SYOSHIFUJI Hideaki struct ipv6_rt_hdr *rthdr = opt->srcrt; 374280a9d34SMasahide NAKAMURA switch (rthdr->type) { 37559fbb3a6SMasahide NAKAMURA #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 376280a9d34SMasahide NAKAMURA case IPV6_SRCRT_TYPE_2: 3776e093d9dSBrian Haley if (rthdr->hdrlen != 2 || 3786e093d9dSBrian Haley rthdr->segments_left != 1) 3796e093d9dSBrian Haley goto sticky_done; 3806e093d9dSBrian Haley 381280a9d34SMasahide NAKAMURA break; 382bb4dbf9eSYOSHIFUJI Hideaki #endif 383280a9d34SMasahide NAKAMURA default: 384333fad53SYOSHIFUJI Hideaki goto sticky_done; 385280a9d34SMasahide NAKAMURA } 386333fad53SYOSHIFUJI Hideaki } 387333fad53SYOSHIFUJI Hideaki 388333fad53SYOSHIFUJI Hideaki retv = 0; 389e7712f1aSYOSHIFUJI Hideaki opt = ipv6_update_options(sk, opt); 390333fad53SYOSHIFUJI Hideaki sticky_done: 391333fad53SYOSHIFUJI Hideaki if (opt) 392333fad53SYOSHIFUJI Hideaki sock_kfree_s(sk, opt, opt->tot_len); 393333fad53SYOSHIFUJI Hideaki break; 394333fad53SYOSHIFUJI Hideaki } 395333fad53SYOSHIFUJI Hideaki 396b24a2516SYang Hongyang case IPV6_PKTINFO: 397b24a2516SYang Hongyang { 398b24a2516SYang Hongyang struct in6_pktinfo pkt; 399b24a2516SYang Hongyang 400b24a2516SYang Hongyang if (optlen == 0) 401b24a2516SYang Hongyang goto e_inval; 402b24a2516SYang Hongyang else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL) 403b24a2516SYang Hongyang goto e_inval; 404b24a2516SYang Hongyang 405914d1164SIlpo Järvinen if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) { 406b24a2516SYang Hongyang retv = -EFAULT; 407b24a2516SYang Hongyang break; 408b24a2516SYang Hongyang } 409b24a2516SYang Hongyang if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if) 410b24a2516SYang Hongyang goto e_inval; 411b24a2516SYang Hongyang 412b24a2516SYang Hongyang np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex; 413b24a2516SYang Hongyang ipv6_addr_copy(&np->sticky_pktinfo.ipi6_addr, &pkt.ipi6_addr); 414b24a2516SYang Hongyang retv = 0; 415b24a2516SYang Hongyang break; 416b24a2516SYang Hongyang } 417b24a2516SYang Hongyang 418333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTOPTIONS: 4191da177e4SLinus Torvalds { 4201da177e4SLinus Torvalds struct ipv6_txoptions *opt = NULL; 4211da177e4SLinus Torvalds struct msghdr msg; 4221da177e4SLinus Torvalds struct flowi fl; 4231da177e4SLinus Torvalds int junk; 4241da177e4SLinus Torvalds 4251da177e4SLinus Torvalds fl.fl6_flowlabel = 0; 4261da177e4SLinus Torvalds fl.oif = sk->sk_bound_dev_if; 42751953d5bSBrian Haley fl.mark = sk->sk_mark; 4281da177e4SLinus Torvalds 4291da177e4SLinus Torvalds if (optlen == 0) 4301da177e4SLinus Torvalds goto update; 4311da177e4SLinus Torvalds 4321da177e4SLinus Torvalds /* 1K is probably excessive 4331da177e4SLinus Torvalds * 1K is surely not enough, 2K per standard header is 16K. 4341da177e4SLinus Torvalds */ 4351da177e4SLinus Torvalds retv = -EINVAL; 4361da177e4SLinus Torvalds if (optlen > 64*1024) 4371da177e4SLinus Torvalds break; 4381da177e4SLinus Torvalds 4391da177e4SLinus Torvalds opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); 4401da177e4SLinus Torvalds retv = -ENOBUFS; 4411da177e4SLinus Torvalds if (opt == NULL) 4421da177e4SLinus Torvalds break; 4431da177e4SLinus Torvalds 4441da177e4SLinus Torvalds memset(opt, 0, sizeof(*opt)); 4451da177e4SLinus Torvalds opt->tot_len = sizeof(*opt) + optlen; 4461da177e4SLinus Torvalds retv = -EFAULT; 4471da177e4SLinus Torvalds if (copy_from_user(opt+1, optval, optlen)) 4481da177e4SLinus Torvalds goto done; 4491da177e4SLinus Torvalds 4501da177e4SLinus Torvalds msg.msg_controllen = optlen; 4511da177e4SLinus Torvalds msg.msg_control = (void*)(opt+1); 4521da177e4SLinus Torvalds 45391e1908fSYOSHIFUJI Hideaki retv = datagram_send_ctl(net, &msg, &fl, opt, &junk, &junk); 4541da177e4SLinus Torvalds if (retv) 4551da177e4SLinus Torvalds goto done; 4561da177e4SLinus Torvalds update: 4571da177e4SLinus Torvalds retv = 0; 458e7712f1aSYOSHIFUJI Hideaki opt = ipv6_update_options(sk, opt); 4591da177e4SLinus Torvalds done: 4601da177e4SLinus Torvalds if (opt) 4611da177e4SLinus Torvalds sock_kfree_s(sk, opt, opt->tot_len); 4621da177e4SLinus Torvalds break; 4631da177e4SLinus Torvalds } 4641da177e4SLinus Torvalds case IPV6_UNICAST_HOPS: 465b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 466b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 4671da177e4SLinus Torvalds if (val > 255 || val < -1) 4681da177e4SLinus Torvalds goto e_inval; 4691da177e4SLinus Torvalds np->hop_limit = val; 4701da177e4SLinus Torvalds retv = 0; 4711da177e4SLinus Torvalds break; 4721da177e4SLinus Torvalds 4731da177e4SLinus Torvalds case IPV6_MULTICAST_HOPS: 4741da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM) 4751717699cSYOSHIFUJI Hideaki break; 476b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 477b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 4781da177e4SLinus Torvalds if (val > 255 || val < -1) 4791da177e4SLinus Torvalds goto e_inval; 4801da177e4SLinus Torvalds np->mcast_hops = val; 4811da177e4SLinus Torvalds retv = 0; 4821da177e4SLinus Torvalds break; 4831da177e4SLinus Torvalds 4841da177e4SLinus Torvalds case IPV6_MULTICAST_LOOP: 485b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 486b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 48728d44882SYOSHIFUJI Hideaki if (val != valbool) 48828d44882SYOSHIFUJI Hideaki goto e_inval; 4891da177e4SLinus Torvalds np->mc_loop = valbool; 4901da177e4SLinus Torvalds retv = 0; 4911da177e4SLinus Torvalds break; 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds case IPV6_MULTICAST_IF: 4941da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM) 4951717699cSYOSHIFUJI Hideaki break; 496b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 497b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 4984953f0fcSBrian Haley 4994953f0fcSBrian Haley if (val) { 5001da177e4SLinus Torvalds if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) 5011da177e4SLinus Torvalds goto e_inval; 5021da177e4SLinus Torvalds 5038a3edd80SDaniel Lezcano if (__dev_get_by_index(net, val) == NULL) { 5041da177e4SLinus Torvalds retv = -ENODEV; 5051da177e4SLinus Torvalds break; 5061da177e4SLinus Torvalds } 5074953f0fcSBrian Haley } 5081da177e4SLinus Torvalds np->mcast_oif = val; 5091da177e4SLinus Torvalds retv = 0; 5101da177e4SLinus Torvalds break; 5111da177e4SLinus Torvalds case IPV6_ADD_MEMBERSHIP: 5121da177e4SLinus Torvalds case IPV6_DROP_MEMBERSHIP: 5131da177e4SLinus Torvalds { 5141da177e4SLinus Torvalds struct ipv6_mreq mreq; 5151da177e4SLinus Torvalds 516a28398baSWang Chen if (optlen < sizeof(struct ipv6_mreq)) 517a28398baSWang Chen goto e_inval; 518a28398baSWang Chen 519a96fb49bSFlavio Leitner retv = -EPROTO; 520a96fb49bSFlavio Leitner if (inet_sk(sk)->is_icsk) 521a96fb49bSFlavio Leitner break; 522a96fb49bSFlavio Leitner 5231da177e4SLinus Torvalds retv = -EFAULT; 5241da177e4SLinus Torvalds if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) 5251da177e4SLinus Torvalds break; 5261da177e4SLinus Torvalds 5271da177e4SLinus Torvalds if (optname == IPV6_ADD_MEMBERSHIP) 5281da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); 5291da177e4SLinus Torvalds else 5301da177e4SLinus Torvalds retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); 5311da177e4SLinus Torvalds break; 5321da177e4SLinus Torvalds } 5331da177e4SLinus Torvalds case IPV6_JOIN_ANYCAST: 5341da177e4SLinus Torvalds case IPV6_LEAVE_ANYCAST: 5351da177e4SLinus Torvalds { 5361da177e4SLinus Torvalds struct ipv6_mreq mreq; 5371da177e4SLinus Torvalds 538a28398baSWang Chen if (optlen < sizeof(struct ipv6_mreq)) 5391da177e4SLinus Torvalds goto e_inval; 5401da177e4SLinus Torvalds 5411da177e4SLinus Torvalds retv = -EFAULT; 5421da177e4SLinus Torvalds if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) 5431da177e4SLinus Torvalds break; 5441da177e4SLinus Torvalds 5451da177e4SLinus Torvalds if (optname == IPV6_JOIN_ANYCAST) 5461da177e4SLinus Torvalds retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); 5471da177e4SLinus Torvalds else 5481da177e4SLinus Torvalds retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); 5491da177e4SLinus Torvalds break; 5501da177e4SLinus Torvalds } 5511da177e4SLinus Torvalds case MCAST_JOIN_GROUP: 5521da177e4SLinus Torvalds case MCAST_LEAVE_GROUP: 5531da177e4SLinus Torvalds { 5541da177e4SLinus Torvalds struct group_req greq; 5551da177e4SLinus Torvalds struct sockaddr_in6 *psin6; 5561da177e4SLinus Torvalds 557a28398baSWang Chen if (optlen < sizeof(struct group_req)) 558a28398baSWang Chen goto e_inval; 559a28398baSWang Chen 5601da177e4SLinus Torvalds retv = -EFAULT; 5611da177e4SLinus Torvalds if (copy_from_user(&greq, optval, sizeof(struct group_req))) 5621da177e4SLinus Torvalds break; 5631da177e4SLinus Torvalds if (greq.gr_group.ss_family != AF_INET6) { 5641da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 5651da177e4SLinus Torvalds break; 5661da177e4SLinus Torvalds } 5671da177e4SLinus Torvalds psin6 = (struct sockaddr_in6 *)&greq.gr_group; 5681da177e4SLinus Torvalds if (optname == MCAST_JOIN_GROUP) 5691da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, greq.gr_interface, 5701da177e4SLinus Torvalds &psin6->sin6_addr); 5711da177e4SLinus Torvalds else 5721da177e4SLinus Torvalds retv = ipv6_sock_mc_drop(sk, greq.gr_interface, 5731da177e4SLinus Torvalds &psin6->sin6_addr); 5741da177e4SLinus Torvalds break; 5751da177e4SLinus Torvalds } 5761da177e4SLinus Torvalds case MCAST_JOIN_SOURCE_GROUP: 5771da177e4SLinus Torvalds case MCAST_LEAVE_SOURCE_GROUP: 5781da177e4SLinus Torvalds case MCAST_BLOCK_SOURCE: 5791da177e4SLinus Torvalds case MCAST_UNBLOCK_SOURCE: 5801da177e4SLinus Torvalds { 5811da177e4SLinus Torvalds struct group_source_req greqs; 5821da177e4SLinus Torvalds int omode, add; 5831da177e4SLinus Torvalds 584a28398baSWang Chen if (optlen < sizeof(struct group_source_req)) 5851da177e4SLinus Torvalds goto e_inval; 5861da177e4SLinus Torvalds if (copy_from_user(&greqs, optval, sizeof(greqs))) { 5871da177e4SLinus Torvalds retv = -EFAULT; 5881da177e4SLinus Torvalds break; 5891da177e4SLinus Torvalds } 5901da177e4SLinus Torvalds if (greqs.gsr_group.ss_family != AF_INET6 || 5911da177e4SLinus Torvalds greqs.gsr_source.ss_family != AF_INET6) { 5921da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 5931da177e4SLinus Torvalds break; 5941da177e4SLinus Torvalds } 5951da177e4SLinus Torvalds if (optname == MCAST_BLOCK_SOURCE) { 5961da177e4SLinus Torvalds omode = MCAST_EXCLUDE; 5971da177e4SLinus Torvalds add = 1; 5981da177e4SLinus Torvalds } else if (optname == MCAST_UNBLOCK_SOURCE) { 5991da177e4SLinus Torvalds omode = MCAST_EXCLUDE; 6001da177e4SLinus Torvalds add = 0; 6011da177e4SLinus Torvalds } else if (optname == MCAST_JOIN_SOURCE_GROUP) { 6021da177e4SLinus Torvalds struct sockaddr_in6 *psin6; 6031da177e4SLinus Torvalds 6041da177e4SLinus Torvalds psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; 6051da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, 6061da177e4SLinus Torvalds &psin6->sin6_addr); 607c9e3e8b6SDavid L Stevens /* prior join w/ different source is ok */ 608c9e3e8b6SDavid L Stevens if (retv && retv != -EADDRINUSE) 6091da177e4SLinus Torvalds break; 6101da177e4SLinus Torvalds omode = MCAST_INCLUDE; 6111da177e4SLinus Torvalds add = 1; 612c9e3e8b6SDavid L Stevens } else /* MCAST_LEAVE_SOURCE_GROUP */ { 6131da177e4SLinus Torvalds omode = MCAST_INCLUDE; 6141da177e4SLinus Torvalds add = 0; 6151da177e4SLinus Torvalds } 6161da177e4SLinus Torvalds retv = ip6_mc_source(add, omode, sk, &greqs); 6171da177e4SLinus Torvalds break; 6181da177e4SLinus Torvalds } 6191da177e4SLinus Torvalds case MCAST_MSFILTER: 6201da177e4SLinus Torvalds { 6211da177e4SLinus Torvalds extern int sysctl_mld_max_msf; 6221da177e4SLinus Torvalds struct group_filter *gsf; 6231da177e4SLinus Torvalds 6241da177e4SLinus Torvalds if (optlen < GROUP_FILTER_SIZE(0)) 6251da177e4SLinus Torvalds goto e_inval; 6261da177e4SLinus Torvalds if (optlen > sysctl_optmem_max) { 6271da177e4SLinus Torvalds retv = -ENOBUFS; 6281da177e4SLinus Torvalds break; 6291da177e4SLinus Torvalds } 6308b3a7005SKris Katterjohn gsf = kmalloc(optlen,GFP_KERNEL); 631cfcabdccSStephen Hemminger if (!gsf) { 6321da177e4SLinus Torvalds retv = -ENOBUFS; 6331da177e4SLinus Torvalds break; 6341da177e4SLinus Torvalds } 6351da177e4SLinus Torvalds retv = -EFAULT; 6361da177e4SLinus Torvalds if (copy_from_user(gsf, optval, optlen)) { 6371da177e4SLinus Torvalds kfree(gsf); 6381da177e4SLinus Torvalds break; 6391da177e4SLinus Torvalds } 6401da177e4SLinus Torvalds /* numsrc >= (4G-140)/128 overflow in 32 bits */ 6411da177e4SLinus Torvalds if (gsf->gf_numsrc >= 0x1ffffffU || 6421da177e4SLinus Torvalds gsf->gf_numsrc > sysctl_mld_max_msf) { 6431da177e4SLinus Torvalds kfree(gsf); 6441da177e4SLinus Torvalds retv = -ENOBUFS; 6451da177e4SLinus Torvalds break; 6461da177e4SLinus Torvalds } 6471da177e4SLinus Torvalds if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { 6481da177e4SLinus Torvalds kfree(gsf); 6491da177e4SLinus Torvalds retv = -EINVAL; 6501da177e4SLinus Torvalds break; 6511da177e4SLinus Torvalds } 6521da177e4SLinus Torvalds retv = ip6_mc_msfilter(sk, gsf); 6531da177e4SLinus Torvalds kfree(gsf); 6541da177e4SLinus Torvalds 6551da177e4SLinus Torvalds break; 6561da177e4SLinus Torvalds } 6571da177e4SLinus Torvalds case IPV6_ROUTER_ALERT: 658b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 659b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 660725a8ff0SDenis V. Lunev retv = ip6_ra_control(sk, val); 6611da177e4SLinus Torvalds break; 6621da177e4SLinus Torvalds case IPV6_MTU_DISCOVER: 663b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 664b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 665628a5c56SJohn Heffner if (val<0 || val>3) 6661da177e4SLinus Torvalds goto e_inval; 6671da177e4SLinus Torvalds np->pmtudisc = val; 6681da177e4SLinus Torvalds retv = 0; 6691da177e4SLinus Torvalds break; 6701da177e4SLinus Torvalds case IPV6_MTU: 671b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 672b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 6731da177e4SLinus Torvalds if (val && val < IPV6_MIN_MTU) 6741da177e4SLinus Torvalds goto e_inval; 6751da177e4SLinus Torvalds np->frag_size = val; 6761da177e4SLinus Torvalds retv = 0; 6771da177e4SLinus Torvalds break; 6781da177e4SLinus Torvalds case IPV6_RECVERR: 679b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 680b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 6811da177e4SLinus Torvalds np->recverr = valbool; 6821da177e4SLinus Torvalds if (!val) 6831da177e4SLinus Torvalds skb_queue_purge(&sk->sk_error_queue); 6841da177e4SLinus Torvalds retv = 0; 6851da177e4SLinus Torvalds break; 6861da177e4SLinus Torvalds case IPV6_FLOWINFO_SEND: 687b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 688b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 6891da177e4SLinus Torvalds np->sndflow = valbool; 6901da177e4SLinus Torvalds retv = 0; 6911da177e4SLinus Torvalds break; 6921da177e4SLinus Torvalds case IPV6_FLOWLABEL_MGR: 6931da177e4SLinus Torvalds retv = ipv6_flowlabel_opt(sk, optval, optlen); 6941da177e4SLinus Torvalds break; 6951da177e4SLinus Torvalds case IPV6_IPSEC_POLICY: 6961da177e4SLinus Torvalds case IPV6_XFRM_POLICY: 6976fc0b4a7SHerbert Xu retv = -EPERM; 6986fc0b4a7SHerbert Xu if (!capable(CAP_NET_ADMIN)) 6996fc0b4a7SHerbert Xu break; 7001da177e4SLinus Torvalds retv = xfrm_user_policy(sk, optname, optval, optlen); 7011da177e4SLinus Torvalds break; 7021da177e4SLinus Torvalds 7037cbca67cSYOSHIFUJI Hideaki case IPV6_ADDR_PREFERENCES: 7047cbca67cSYOSHIFUJI Hideaki { 7057cbca67cSYOSHIFUJI Hideaki unsigned int pref = 0; 7067cbca67cSYOSHIFUJI Hideaki unsigned int prefmask = ~0; 7077cbca67cSYOSHIFUJI Hideaki 708b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 709b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 710b2a9d7c2SYOSHIFUJI Hideaki 7117cbca67cSYOSHIFUJI Hideaki retv = -EINVAL; 7127cbca67cSYOSHIFUJI Hideaki 7137cbca67cSYOSHIFUJI Hideaki /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ 7147cbca67cSYOSHIFUJI Hideaki switch (val & (IPV6_PREFER_SRC_PUBLIC| 7157cbca67cSYOSHIFUJI Hideaki IPV6_PREFER_SRC_TMP| 7167cbca67cSYOSHIFUJI Hideaki IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { 7177cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_PUBLIC: 7187cbca67cSYOSHIFUJI Hideaki pref |= IPV6_PREFER_SRC_PUBLIC; 7197cbca67cSYOSHIFUJI Hideaki break; 7207cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_TMP: 7217cbca67cSYOSHIFUJI Hideaki pref |= IPV6_PREFER_SRC_TMP; 7227cbca67cSYOSHIFUJI Hideaki break; 7237cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_PUBTMP_DEFAULT: 7247cbca67cSYOSHIFUJI Hideaki break; 7257cbca67cSYOSHIFUJI Hideaki case 0: 7267cbca67cSYOSHIFUJI Hideaki goto pref_skip_pubtmp; 7277cbca67cSYOSHIFUJI Hideaki default: 7287cbca67cSYOSHIFUJI Hideaki goto e_inval; 7291da177e4SLinus Torvalds } 7307cbca67cSYOSHIFUJI Hideaki 7317cbca67cSYOSHIFUJI Hideaki prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| 7327cbca67cSYOSHIFUJI Hideaki IPV6_PREFER_SRC_TMP); 7337cbca67cSYOSHIFUJI Hideaki pref_skip_pubtmp: 7347cbca67cSYOSHIFUJI Hideaki 7357cbca67cSYOSHIFUJI Hideaki /* check HOME/COA conflicts */ 7367cbca67cSYOSHIFUJI Hideaki switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { 7377cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_HOME: 7387cbca67cSYOSHIFUJI Hideaki break; 7397cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_COA: 7407cbca67cSYOSHIFUJI Hideaki pref |= IPV6_PREFER_SRC_COA; 7417cbca67cSYOSHIFUJI Hideaki case 0: 7427cbca67cSYOSHIFUJI Hideaki goto pref_skip_coa; 7437cbca67cSYOSHIFUJI Hideaki default: 7447cbca67cSYOSHIFUJI Hideaki goto e_inval; 7457cbca67cSYOSHIFUJI Hideaki } 7467cbca67cSYOSHIFUJI Hideaki 7477cbca67cSYOSHIFUJI Hideaki prefmask &= ~IPV6_PREFER_SRC_COA; 7487cbca67cSYOSHIFUJI Hideaki pref_skip_coa: 7497cbca67cSYOSHIFUJI Hideaki 7507cbca67cSYOSHIFUJI Hideaki /* check CGA/NONCGA conflicts */ 7517cbca67cSYOSHIFUJI Hideaki switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { 7527cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_CGA: 7537cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_NONCGA: 7547cbca67cSYOSHIFUJI Hideaki case 0: 7557cbca67cSYOSHIFUJI Hideaki break; 7567cbca67cSYOSHIFUJI Hideaki default: 7577cbca67cSYOSHIFUJI Hideaki goto e_inval; 7587cbca67cSYOSHIFUJI Hideaki } 7597cbca67cSYOSHIFUJI Hideaki 7607cbca67cSYOSHIFUJI Hideaki np->srcprefs = (np->srcprefs & prefmask) | pref; 7617cbca67cSYOSHIFUJI Hideaki retv = 0; 7627cbca67cSYOSHIFUJI Hideaki 7637cbca67cSYOSHIFUJI Hideaki break; 7647cbca67cSYOSHIFUJI Hideaki } 7657cbca67cSYOSHIFUJI Hideaki } 7667cbca67cSYOSHIFUJI Hideaki 7671da177e4SLinus Torvalds release_sock(sk); 7681da177e4SLinus Torvalds 7691da177e4SLinus Torvalds return retv; 7701da177e4SLinus Torvalds 7711da177e4SLinus Torvalds e_inval: 7721da177e4SLinus Torvalds release_sock(sk); 7731da177e4SLinus Torvalds return -EINVAL; 7741da177e4SLinus Torvalds } 7751da177e4SLinus Torvalds 7763fdadf7dSDmitry Mishin int ipv6_setsockopt(struct sock *sk, int level, int optname, 777b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 7783fdadf7dSDmitry Mishin { 7793fdadf7dSDmitry Mishin int err; 7803fdadf7dSDmitry Mishin 7813fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) 7823fdadf7dSDmitry Mishin return udp_prot.setsockopt(sk, level, optname, optval, optlen); 7833fdadf7dSDmitry Mishin 7843fdadf7dSDmitry Mishin if (level != SOL_IPV6) 7853fdadf7dSDmitry Mishin return -ENOPROTOOPT; 7863fdadf7dSDmitry Mishin 7873fdadf7dSDmitry Mishin err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); 7883fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 7893fdadf7dSDmitry Mishin /* we need to exclude all possible ENOPROTOOPTs except default case */ 7903fdadf7dSDmitry Mishin if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && 7913fdadf7dSDmitry Mishin optname != IPV6_XFRM_POLICY) { 7923fdadf7dSDmitry Mishin lock_sock(sk); 7933fdadf7dSDmitry Mishin err = nf_setsockopt(sk, PF_INET6, optname, optval, 7943fdadf7dSDmitry Mishin optlen); 7953fdadf7dSDmitry Mishin release_sock(sk); 7963fdadf7dSDmitry Mishin } 7973fdadf7dSDmitry Mishin #endif 7983fdadf7dSDmitry Mishin return err; 7993fdadf7dSDmitry Mishin } 8003fdadf7dSDmitry Mishin 8017159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_setsockopt); 8023fdadf7dSDmitry Mishin 8033fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 8043fdadf7dSDmitry Mishin int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, 805b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 8063fdadf7dSDmitry Mishin { 8073fdadf7dSDmitry Mishin int err; 8083fdadf7dSDmitry Mishin 8093fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) { 810543d9cfeSArnaldo Carvalho de Melo if (udp_prot.compat_setsockopt != NULL) 811543d9cfeSArnaldo Carvalho de Melo return udp_prot.compat_setsockopt(sk, level, optname, 812543d9cfeSArnaldo Carvalho de Melo optval, optlen); 813543d9cfeSArnaldo Carvalho de Melo return udp_prot.setsockopt(sk, level, optname, optval, optlen); 8143fdadf7dSDmitry Mishin } 8153fdadf7dSDmitry Mishin 8163fdadf7dSDmitry Mishin if (level != SOL_IPV6) 8173fdadf7dSDmitry Mishin return -ENOPROTOOPT; 8183fdadf7dSDmitry Mishin 819dae50295SDavid L Stevens if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) 820dae50295SDavid L Stevens return compat_mc_setsockopt(sk, level, optname, optval, optlen, 821dae50295SDavid L Stevens ipv6_setsockopt); 822dae50295SDavid L Stevens 8233fdadf7dSDmitry Mishin err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); 8243fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 8253fdadf7dSDmitry Mishin /* we need to exclude all possible ENOPROTOOPTs except default case */ 8263fdadf7dSDmitry Mishin if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && 8273fdadf7dSDmitry Mishin optname != IPV6_XFRM_POLICY) { 8283fdadf7dSDmitry Mishin lock_sock(sk); 829543d9cfeSArnaldo Carvalho de Melo err = compat_nf_setsockopt(sk, PF_INET6, optname, 830543d9cfeSArnaldo Carvalho de Melo optval, optlen); 8313fdadf7dSDmitry Mishin release_sock(sk); 8323fdadf7dSDmitry Mishin } 8333fdadf7dSDmitry Mishin #endif 8343fdadf7dSDmitry Mishin return err; 8353fdadf7dSDmitry Mishin } 836543d9cfeSArnaldo Carvalho de Melo 837543d9cfeSArnaldo Carvalho de Melo EXPORT_SYMBOL(compat_ipv6_setsockopt); 8383fdadf7dSDmitry Mishin #endif 8393fdadf7dSDmitry Mishin 84028693079SDavid S. Miller static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, 8414c6510a7SYOSHIFUJI Hideaki int optname, char __user *optval, int len) 842333fad53SYOSHIFUJI Hideaki { 84328693079SDavid S. Miller struct ipv6_opt_hdr *hdr; 84428693079SDavid S. Miller 8454c6510a7SYOSHIFUJI Hideaki if (!opt) 846333fad53SYOSHIFUJI Hideaki return 0; 8474c6510a7SYOSHIFUJI Hideaki 8484c6510a7SYOSHIFUJI Hideaki switch(optname) { 8494c6510a7SYOSHIFUJI Hideaki case IPV6_HOPOPTS: 85028693079SDavid S. Miller hdr = opt->hopopt; 8514c6510a7SYOSHIFUJI Hideaki break; 8524c6510a7SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 8534c6510a7SYOSHIFUJI Hideaki hdr = opt->dst0opt; 8544c6510a7SYOSHIFUJI Hideaki break; 8554c6510a7SYOSHIFUJI Hideaki case IPV6_RTHDR: 8564c6510a7SYOSHIFUJI Hideaki hdr = (struct ipv6_opt_hdr *)opt->srcrt; 8574c6510a7SYOSHIFUJI Hideaki break; 8584c6510a7SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 8594c6510a7SYOSHIFUJI Hideaki hdr = opt->dst1opt; 8604c6510a7SYOSHIFUJI Hideaki break; 8614c6510a7SYOSHIFUJI Hideaki default: 8624c6510a7SYOSHIFUJI Hideaki return -EINVAL; /* should not happen */ 8634c6510a7SYOSHIFUJI Hideaki } 8644c6510a7SYOSHIFUJI Hideaki 8654c6510a7SYOSHIFUJI Hideaki if (!hdr) 8664c6510a7SYOSHIFUJI Hideaki return 0; 86728693079SDavid S. Miller 868d2b02ed9SChris Wright len = min_t(unsigned int, len, ipv6_optlen(hdr)); 869660adc6eSIlpo Järvinen if (copy_to_user(optval, hdr, len)) 870333fad53SYOSHIFUJI Hideaki return -EFAULT; 87195b496b6SYang Hongyang return len; 872333fad53SYOSHIFUJI Hideaki } 873333fad53SYOSHIFUJI Hideaki 8743fdadf7dSDmitry Mishin static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, 8751da177e4SLinus Torvalds char __user *optval, int __user *optlen) 8761da177e4SLinus Torvalds { 8771da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 8781da177e4SLinus Torvalds int len; 8791da177e4SLinus Torvalds int val; 8801da177e4SLinus Torvalds 8817bc570c8SYOSHIFUJI Hideaki if (ip6_mroute_opt(optname)) 8827bc570c8SYOSHIFUJI Hideaki return ip6_mroute_getsockopt(sk, optname, optval, optlen); 8837bc570c8SYOSHIFUJI Hideaki 8841da177e4SLinus Torvalds if (get_user(len, optlen)) 8851da177e4SLinus Torvalds return -EFAULT; 8861da177e4SLinus Torvalds switch (optname) { 8871da177e4SLinus Torvalds case IPV6_ADDRFORM: 8881da177e4SLinus Torvalds if (sk->sk_protocol != IPPROTO_UDP && 889ba4e58ecSGerrit Renker sk->sk_protocol != IPPROTO_UDPLITE && 8901da177e4SLinus Torvalds sk->sk_protocol != IPPROTO_TCP) 8911717699cSYOSHIFUJI Hideaki return -ENOPROTOOPT; 8921da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) 8931da177e4SLinus Torvalds return -ENOTCONN; 8941da177e4SLinus Torvalds val = sk->sk_family; 8951da177e4SLinus Torvalds break; 8961da177e4SLinus Torvalds case MCAST_MSFILTER: 8971da177e4SLinus Torvalds { 8981da177e4SLinus Torvalds struct group_filter gsf; 8991da177e4SLinus Torvalds int err; 9001da177e4SLinus Torvalds 9011da177e4SLinus Torvalds if (len < GROUP_FILTER_SIZE(0)) 9021da177e4SLinus Torvalds return -EINVAL; 9031da177e4SLinus Torvalds if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) 9041da177e4SLinus Torvalds return -EFAULT; 90520c61fbdSYOSHIFUJI Hideaki if (gsf.gf_group.ss_family != AF_INET6) 90620c61fbdSYOSHIFUJI Hideaki return -EADDRNOTAVAIL; 9071da177e4SLinus Torvalds lock_sock(sk); 9081da177e4SLinus Torvalds err = ip6_mc_msfget(sk, &gsf, 9091da177e4SLinus Torvalds (struct group_filter __user *)optval, optlen); 9101da177e4SLinus Torvalds release_sock(sk); 9111da177e4SLinus Torvalds return err; 9121da177e4SLinus Torvalds } 9131da177e4SLinus Torvalds 914333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTOPTIONS: 9151da177e4SLinus Torvalds { 9161da177e4SLinus Torvalds struct msghdr msg; 9171da177e4SLinus Torvalds struct sk_buff *skb; 9181da177e4SLinus Torvalds 9191da177e4SLinus Torvalds if (sk->sk_type != SOCK_STREAM) 9201da177e4SLinus Torvalds return -ENOPROTOOPT; 9211da177e4SLinus Torvalds 9221da177e4SLinus Torvalds msg.msg_control = optval; 9231da177e4SLinus Torvalds msg.msg_controllen = len; 9241da177e4SLinus Torvalds msg.msg_flags = 0; 9251da177e4SLinus Torvalds 9261da177e4SLinus Torvalds lock_sock(sk); 9271da177e4SLinus Torvalds skb = np->pktoptions; 9281da177e4SLinus Torvalds if (skb) 9291da177e4SLinus Torvalds atomic_inc(&skb->users); 9301da177e4SLinus Torvalds release_sock(sk); 9311da177e4SLinus Torvalds 9321da177e4SLinus Torvalds if (skb) { 9331da177e4SLinus Torvalds int err = datagram_recv_ctl(sk, &msg, skb); 9341da177e4SLinus Torvalds kfree_skb(skb); 9351da177e4SLinus Torvalds if (err) 9361da177e4SLinus Torvalds return err; 9371da177e4SLinus Torvalds } else { 9381da177e4SLinus Torvalds if (np->rxopt.bits.rxinfo) { 9391da177e4SLinus Torvalds struct in6_pktinfo src_info; 940f250dcdaSYang Hongyang src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : 941f250dcdaSYang Hongyang np->sticky_pktinfo.ipi6_ifindex; 942f250dcdaSYang Hongyang np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) : 943f250dcdaSYang Hongyang ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr)); 9441da177e4SLinus Torvalds put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); 9451da177e4SLinus Torvalds } 9461da177e4SLinus Torvalds if (np->rxopt.bits.rxhlim) { 9471da177e4SLinus Torvalds int hlim = np->mcast_hops; 9481da177e4SLinus Torvalds put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); 9491da177e4SLinus Torvalds } 950333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxoinfo) { 951333fad53SYOSHIFUJI Hideaki struct in6_pktinfo src_info; 952f250dcdaSYang Hongyang src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : 953f250dcdaSYang Hongyang np->sticky_pktinfo.ipi6_ifindex; 954f250dcdaSYang Hongyang np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) : 955f250dcdaSYang Hongyang ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr)); 956333fad53SYOSHIFUJI Hideaki put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); 957333fad53SYOSHIFUJI Hideaki } 958333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxohlim) { 959333fad53SYOSHIFUJI Hideaki int hlim = np->mcast_hops; 960333fad53SYOSHIFUJI Hideaki put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); 961333fad53SYOSHIFUJI Hideaki } 9621da177e4SLinus Torvalds } 9631da177e4SLinus Torvalds len -= msg.msg_controllen; 9641da177e4SLinus Torvalds return put_user(len, optlen); 9651da177e4SLinus Torvalds } 9661da177e4SLinus Torvalds case IPV6_MTU: 9671da177e4SLinus Torvalds { 9681da177e4SLinus Torvalds struct dst_entry *dst; 9691da177e4SLinus Torvalds val = 0; 9701da177e4SLinus Torvalds lock_sock(sk); 9711da177e4SLinus Torvalds dst = sk_dst_get(sk); 9721da177e4SLinus Torvalds if (dst) { 9731da177e4SLinus Torvalds val = dst_mtu(dst); 9741da177e4SLinus Torvalds dst_release(dst); 9751da177e4SLinus Torvalds } 9761da177e4SLinus Torvalds release_sock(sk); 9771da177e4SLinus Torvalds if (!val) 9781da177e4SLinus Torvalds return -ENOTCONN; 9791da177e4SLinus Torvalds break; 9801da177e4SLinus Torvalds } 9811da177e4SLinus Torvalds 9821da177e4SLinus Torvalds case IPV6_V6ONLY: 9831da177e4SLinus Torvalds val = np->ipv6only; 9841da177e4SLinus Torvalds break; 9851da177e4SLinus Torvalds 986333fad53SYOSHIFUJI Hideaki case IPV6_RECVPKTINFO: 9871da177e4SLinus Torvalds val = np->rxopt.bits.rxinfo; 9881da177e4SLinus Torvalds break; 9891da177e4SLinus Torvalds 990333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 991333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.rxoinfo; 992333fad53SYOSHIFUJI Hideaki break; 993333fad53SYOSHIFUJI Hideaki 994333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPLIMIT: 9951da177e4SLinus Torvalds val = np->rxopt.bits.rxhlim; 9961da177e4SLinus Torvalds break; 9971da177e4SLinus Torvalds 998333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 999333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.rxohlim; 1000333fad53SYOSHIFUJI Hideaki break; 1001333fad53SYOSHIFUJI Hideaki 1002333fad53SYOSHIFUJI Hideaki case IPV6_RECVRTHDR: 10031da177e4SLinus Torvalds val = np->rxopt.bits.srcrt; 10041da177e4SLinus Torvalds break; 10051da177e4SLinus Torvalds 1006333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 1007333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.osrcrt; 1008333fad53SYOSHIFUJI Hideaki break; 1009333fad53SYOSHIFUJI Hideaki 10101da177e4SLinus Torvalds case IPV6_HOPOPTS: 1011333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 1012333fad53SYOSHIFUJI Hideaki case IPV6_RTHDR: 1013333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 1014333fad53SYOSHIFUJI Hideaki { 1015333fad53SYOSHIFUJI Hideaki 1016333fad53SYOSHIFUJI Hideaki lock_sock(sk); 101728693079SDavid S. Miller len = ipv6_getsockopt_sticky(sk, np->opt, 10184c6510a7SYOSHIFUJI Hideaki optname, optval, len); 1019333fad53SYOSHIFUJI Hideaki release_sock(sk); 102005335c22SYang Hongyang /* check if ipv6_getsockopt_sticky() returns err code */ 102105335c22SYang Hongyang if (len < 0) 102205335c22SYang Hongyang return len; 1023333fad53SYOSHIFUJI Hideaki return put_user(len, optlen); 1024333fad53SYOSHIFUJI Hideaki } 1025333fad53SYOSHIFUJI Hideaki 1026333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPOPTS: 10271da177e4SLinus Torvalds val = np->rxopt.bits.hopopts; 10281da177e4SLinus Torvalds break; 10291da177e4SLinus Torvalds 1030333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 1031333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.ohopopts; 1032333fad53SYOSHIFUJI Hideaki break; 1033333fad53SYOSHIFUJI Hideaki 1034333fad53SYOSHIFUJI Hideaki case IPV6_RECVDSTOPTS: 10351da177e4SLinus Torvalds val = np->rxopt.bits.dstopts; 10361da177e4SLinus Torvalds break; 10371da177e4SLinus Torvalds 1038333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 1039333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.odstopts; 1040333fad53SYOSHIFUJI Hideaki break; 1041333fad53SYOSHIFUJI Hideaki 104241a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 104341a1f8eaSYOSHIFUJI Hideaki val = np->tclass; 104441a1f8eaSYOSHIFUJI Hideaki break; 104541a1f8eaSYOSHIFUJI Hideaki 104641a1f8eaSYOSHIFUJI Hideaki case IPV6_RECVTCLASS: 104741a1f8eaSYOSHIFUJI Hideaki val = np->rxopt.bits.rxtclass; 104841a1f8eaSYOSHIFUJI Hideaki break; 104941a1f8eaSYOSHIFUJI Hideaki 10501da177e4SLinus Torvalds case IPV6_FLOWINFO: 10511da177e4SLinus Torvalds val = np->rxopt.bits.rxflow; 10521da177e4SLinus Torvalds break; 10531da177e4SLinus Torvalds 10541da177e4SLinus Torvalds case IPV6_UNICAST_HOPS: 10551da177e4SLinus Torvalds case IPV6_MULTICAST_HOPS: 1056befffe90SBrian Haley { 1057befffe90SBrian Haley struct dst_entry *dst; 1058befffe90SBrian Haley 1059befffe90SBrian Haley if (optname == IPV6_UNICAST_HOPS) 1060befffe90SBrian Haley val = np->hop_limit; 1061befffe90SBrian Haley else 10621da177e4SLinus Torvalds val = np->mcast_hops; 1063befffe90SBrian Haley 1064befffe90SBrian Haley dst = sk_dst_get(sk); 1065befffe90SBrian Haley if (dst) { 1066befffe90SBrian Haley if (val < 0) 10676b75d090SYOSHIFUJI Hideaki val = ip6_dst_hoplimit(dst); 1068befffe90SBrian Haley dst_release(dst); 1069befffe90SBrian Haley } 1070befffe90SBrian Haley if (val < 0) 107153b7997fSYOSHIFUJI Hideaki val = sock_net(sk)->ipv6.devconf_all->hop_limit; 10721da177e4SLinus Torvalds break; 1073befffe90SBrian Haley } 10741da177e4SLinus Torvalds 10751da177e4SLinus Torvalds case IPV6_MULTICAST_LOOP: 10761da177e4SLinus Torvalds val = np->mc_loop; 10771da177e4SLinus Torvalds break; 10781da177e4SLinus Torvalds 10791da177e4SLinus Torvalds case IPV6_MULTICAST_IF: 10801da177e4SLinus Torvalds val = np->mcast_oif; 10811da177e4SLinus Torvalds break; 10821da177e4SLinus Torvalds 10831da177e4SLinus Torvalds case IPV6_MTU_DISCOVER: 10841da177e4SLinus Torvalds val = np->pmtudisc; 10851da177e4SLinus Torvalds break; 10861da177e4SLinus Torvalds 10871da177e4SLinus Torvalds case IPV6_RECVERR: 10881da177e4SLinus Torvalds val = np->recverr; 10891da177e4SLinus Torvalds break; 10901da177e4SLinus Torvalds 10911da177e4SLinus Torvalds case IPV6_FLOWINFO_SEND: 10921da177e4SLinus Torvalds val = np->sndflow; 10931da177e4SLinus Torvalds break; 10941da177e4SLinus Torvalds 10957cbca67cSYOSHIFUJI Hideaki case IPV6_ADDR_PREFERENCES: 10967cbca67cSYOSHIFUJI Hideaki val = 0; 10977cbca67cSYOSHIFUJI Hideaki 10987cbca67cSYOSHIFUJI Hideaki if (np->srcprefs & IPV6_PREFER_SRC_TMP) 10997cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_TMP; 11007cbca67cSYOSHIFUJI Hideaki else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) 11017cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_PUBLIC; 11027cbca67cSYOSHIFUJI Hideaki else { 11037cbca67cSYOSHIFUJI Hideaki /* XXX: should we return system default? */ 11047cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; 11057cbca67cSYOSHIFUJI Hideaki } 11067cbca67cSYOSHIFUJI Hideaki 11077cbca67cSYOSHIFUJI Hideaki if (np->srcprefs & IPV6_PREFER_SRC_COA) 11087cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_COA; 11097cbca67cSYOSHIFUJI Hideaki else 11107cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_HOME; 11117cbca67cSYOSHIFUJI Hideaki break; 11127cbca67cSYOSHIFUJI Hideaki 11131da177e4SLinus Torvalds default: 1114cf6fc4a9SWei Yongjun return -ENOPROTOOPT; 11151da177e4SLinus Torvalds } 11161da177e4SLinus Torvalds len = min_t(unsigned int, sizeof(int), len); 11171da177e4SLinus Torvalds if(put_user(len, optlen)) 11181da177e4SLinus Torvalds return -EFAULT; 11191da177e4SLinus Torvalds if(copy_to_user(optval,&val,len)) 11201da177e4SLinus Torvalds return -EFAULT; 11211da177e4SLinus Torvalds return 0; 11221da177e4SLinus Torvalds } 11231da177e4SLinus Torvalds 11243fdadf7dSDmitry Mishin int ipv6_getsockopt(struct sock *sk, int level, int optname, 11253fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 11263fdadf7dSDmitry Mishin { 11273fdadf7dSDmitry Mishin int err; 11283fdadf7dSDmitry Mishin 11293fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) 11303fdadf7dSDmitry Mishin return udp_prot.getsockopt(sk, level, optname, optval, optlen); 11313fdadf7dSDmitry Mishin 11323fdadf7dSDmitry Mishin if(level != SOL_IPV6) 11333fdadf7dSDmitry Mishin return -ENOPROTOOPT; 11343fdadf7dSDmitry Mishin 11353fdadf7dSDmitry Mishin err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); 11363fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 1137cf6fc4a9SWei Yongjun /* we need to exclude all possible ENOPROTOOPTs except default case */ 1138cf6fc4a9SWei Yongjun if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { 11393fdadf7dSDmitry Mishin int len; 11403fdadf7dSDmitry Mishin 11413fdadf7dSDmitry Mishin if (get_user(len, optlen)) 11423fdadf7dSDmitry Mishin return -EFAULT; 11433fdadf7dSDmitry Mishin 11443fdadf7dSDmitry Mishin lock_sock(sk); 11453fdadf7dSDmitry Mishin err = nf_getsockopt(sk, PF_INET6, optname, optval, 11463fdadf7dSDmitry Mishin &len); 11473fdadf7dSDmitry Mishin release_sock(sk); 11483fdadf7dSDmitry Mishin if (err >= 0) 11493fdadf7dSDmitry Mishin err = put_user(len, optlen); 11503fdadf7dSDmitry Mishin } 11513fdadf7dSDmitry Mishin #endif 11523fdadf7dSDmitry Mishin return err; 11533fdadf7dSDmitry Mishin } 11543fdadf7dSDmitry Mishin 11557159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_getsockopt); 11567159039aSYOSHIFUJI Hideaki 11573fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 11583fdadf7dSDmitry Mishin int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, 11593fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 11603fdadf7dSDmitry Mishin { 11613fdadf7dSDmitry Mishin int err; 11623fdadf7dSDmitry Mishin 11633fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) { 1164543d9cfeSArnaldo Carvalho de Melo if (udp_prot.compat_getsockopt != NULL) 1165543d9cfeSArnaldo Carvalho de Melo return udp_prot.compat_getsockopt(sk, level, optname, 1166543d9cfeSArnaldo Carvalho de Melo optval, optlen); 1167543d9cfeSArnaldo Carvalho de Melo return udp_prot.getsockopt(sk, level, optname, optval, optlen); 11683fdadf7dSDmitry Mishin } 11693fdadf7dSDmitry Mishin 11703fdadf7dSDmitry Mishin if (level != SOL_IPV6) 11713fdadf7dSDmitry Mishin return -ENOPROTOOPT; 11723fdadf7dSDmitry Mishin 117380991790SPavel Emelyanov if (optname == MCAST_MSFILTER) 117480991790SPavel Emelyanov return compat_mc_getsockopt(sk, level, optname, optval, optlen, 117580991790SPavel Emelyanov ipv6_getsockopt); 117680991790SPavel Emelyanov 11773fdadf7dSDmitry Mishin err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); 11783fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 1179cf6fc4a9SWei Yongjun /* we need to exclude all possible ENOPROTOOPTs except default case */ 1180cf6fc4a9SWei Yongjun if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { 11813fdadf7dSDmitry Mishin int len; 11823fdadf7dSDmitry Mishin 11833fdadf7dSDmitry Mishin if (get_user(len, optlen)) 11843fdadf7dSDmitry Mishin return -EFAULT; 11853fdadf7dSDmitry Mishin 11863fdadf7dSDmitry Mishin lock_sock(sk); 1187543d9cfeSArnaldo Carvalho de Melo err = compat_nf_getsockopt(sk, PF_INET6, 1188543d9cfeSArnaldo Carvalho de Melo optname, optval, &len); 11893fdadf7dSDmitry Mishin release_sock(sk); 11903fdadf7dSDmitry Mishin if (err >= 0) 11913fdadf7dSDmitry Mishin err = put_user(len, optlen); 11923fdadf7dSDmitry Mishin } 11933fdadf7dSDmitry Mishin #endif 11943fdadf7dSDmitry Mishin return err; 11953fdadf7dSDmitry Mishin } 1196543d9cfeSArnaldo Carvalho de Melo 1197543d9cfeSArnaldo Carvalho de Melo EXPORT_SYMBOL(compat_ipv6_getsockopt); 11983fdadf7dSDmitry Mishin #endif 11993fdadf7dSDmitry Mishin 1200