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 58ba89966cSEric Dumazet DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly; 591da177e4SLinus Torvalds 601da177e4SLinus Torvalds struct ip6_ra_chain *ip6_ra_chain; 611da177e4SLinus Torvalds DEFINE_RWLOCK(ip6_ra_lock); 621da177e4SLinus Torvalds 63725a8ff0SDenis V. Lunev int ip6_ra_control(struct sock *sk, int sel) 641da177e4SLinus Torvalds { 651da177e4SLinus Torvalds struct ip6_ra_chain *ra, *new_ra, **rap; 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds /* RA packet may be delivered ONLY to IPPROTO_RAW socket */ 68c720c7e8SEric Dumazet if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num != IPPROTO_RAW) 691717699cSYOSHIFUJI Hideaki return -ENOPROTOOPT; 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds write_lock_bh(&ip6_ra_lock); 741da177e4SLinus Torvalds for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) { 751da177e4SLinus Torvalds if (ra->sk == sk) { 761da177e4SLinus Torvalds if (sel>=0) { 771da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 781da177e4SLinus Torvalds kfree(new_ra); 791da177e4SLinus Torvalds return -EADDRINUSE; 801da177e4SLinus Torvalds } 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds *rap = ra->next; 831da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds sock_put(sk); 861da177e4SLinus Torvalds kfree(ra); 871da177e4SLinus Torvalds return 0; 881da177e4SLinus Torvalds } 891da177e4SLinus Torvalds } 901da177e4SLinus Torvalds if (new_ra == NULL) { 911da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 921da177e4SLinus Torvalds return -ENOBUFS; 931da177e4SLinus Torvalds } 941da177e4SLinus Torvalds new_ra->sk = sk; 951da177e4SLinus Torvalds new_ra->sel = sel; 961da177e4SLinus Torvalds new_ra->next = ra; 971da177e4SLinus Torvalds *rap = new_ra; 981da177e4SLinus Torvalds sock_hold(sk); 991da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 1001da177e4SLinus Torvalds return 0; 1011da177e4SLinus Torvalds } 1021da177e4SLinus Torvalds 103e7712f1aSYOSHIFUJI Hideaki static 104e7712f1aSYOSHIFUJI Hideaki struct ipv6_txoptions *ipv6_update_options(struct sock *sk, 105e7712f1aSYOSHIFUJI Hideaki struct ipv6_txoptions *opt) 106e7712f1aSYOSHIFUJI Hideaki { 107e7712f1aSYOSHIFUJI Hideaki if (inet_sk(sk)->is_icsk) { 108e7712f1aSYOSHIFUJI Hideaki if (opt && 109e7712f1aSYOSHIFUJI Hideaki !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) && 110c720c7e8SEric Dumazet inet_sk(sk)->inet_daddr != LOOPBACK4_IPV6) { 111e7712f1aSYOSHIFUJI Hideaki struct inet_connection_sock *icsk = inet_csk(sk); 112e7712f1aSYOSHIFUJI Hideaki icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen; 113e7712f1aSYOSHIFUJI Hideaki icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); 114e7712f1aSYOSHIFUJI Hideaki } 115e7712f1aSYOSHIFUJI Hideaki opt = xchg(&inet6_sk(sk)->opt, opt); 116e7712f1aSYOSHIFUJI Hideaki } else { 117b6c6712aSEric Dumazet spin_lock(&sk->sk_dst_lock); 118e7712f1aSYOSHIFUJI Hideaki opt = xchg(&inet6_sk(sk)->opt, opt); 119b6c6712aSEric Dumazet spin_unlock(&sk->sk_dst_lock); 120e7712f1aSYOSHIFUJI Hideaki } 121e7712f1aSYOSHIFUJI Hideaki sk_dst_reset(sk); 122e7712f1aSYOSHIFUJI Hideaki 123e7712f1aSYOSHIFUJI Hideaki return opt; 124e7712f1aSYOSHIFUJI Hideaki } 125e7712f1aSYOSHIFUJI Hideaki 1263fdadf7dSDmitry Mishin static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, 127b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1281da177e4SLinus Torvalds { 1291da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 1303b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(sk); 1311da177e4SLinus Torvalds int val, valbool; 1321da177e4SLinus Torvalds int retv = -ENOPROTOOPT; 1331da177e4SLinus Torvalds 1341da177e4SLinus Torvalds if (optval == NULL) 1351da177e4SLinus Torvalds val=0; 136b2a9d7c2SYOSHIFUJI Hideaki else { 137b2a9d7c2SYOSHIFUJI Hideaki if (optlen >= sizeof(int)) { 138b2a9d7c2SYOSHIFUJI Hideaki if (get_user(val, (int __user *) optval)) 1391da177e4SLinus Torvalds return -EFAULT; 140b2a9d7c2SYOSHIFUJI Hideaki } else 141b2a9d7c2SYOSHIFUJI Hideaki val = 0; 142b2a9d7c2SYOSHIFUJI Hideaki } 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds valbool = (val!=0); 1451da177e4SLinus Torvalds 1467bc570c8SYOSHIFUJI Hideaki if (ip6_mroute_opt(optname)) 1477bc570c8SYOSHIFUJI Hideaki return ip6_mroute_setsockopt(sk, optname, optval, optlen); 1487bc570c8SYOSHIFUJI Hideaki 1491da177e4SLinus Torvalds lock_sock(sk); 1501da177e4SLinus Torvalds 1511da177e4SLinus Torvalds switch (optname) { 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds case IPV6_ADDRFORM: 154b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 155b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 1561da177e4SLinus Torvalds if (val == PF_INET) { 1571da177e4SLinus Torvalds struct ipv6_txoptions *opt; 1581da177e4SLinus Torvalds struct sk_buff *pktopt; 1591da177e4SLinus Torvalds 16049d074f4SDenis V. Lunev if (sk->sk_type == SOCK_RAW) 16149d074f4SDenis V. Lunev break; 16249d074f4SDenis V. Lunev 1639596cc82SDenis V. Lunev if (sk->sk_protocol == IPPROTO_UDP || 1649596cc82SDenis V. Lunev sk->sk_protocol == IPPROTO_UDPLITE) { 1659596cc82SDenis V. Lunev struct udp_sock *up = udp_sk(sk); 1669596cc82SDenis V. Lunev if (up->pending == AF_INET6) { 1679596cc82SDenis V. Lunev retv = -EBUSY; 1689596cc82SDenis V. Lunev break; 1699596cc82SDenis V. Lunev } 1709596cc82SDenis V. Lunev } else if (sk->sk_protocol != IPPROTO_TCP) 1711da177e4SLinus Torvalds break; 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) { 1741da177e4SLinus Torvalds retv = -ENOTCONN; 1751da177e4SLinus Torvalds break; 1761da177e4SLinus Torvalds } 1771da177e4SLinus Torvalds 1781da177e4SLinus Torvalds if (ipv6_only_sock(sk) || 179e773e4faSBrian Haley !ipv6_addr_v4mapped(&np->daddr)) { 1801da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 1811da177e4SLinus Torvalds break; 1821da177e4SLinus Torvalds } 1831da177e4SLinus Torvalds 1841da177e4SLinus Torvalds fl6_free_socklist(sk); 1851da177e4SLinus Torvalds ipv6_sock_mc_close(sk); 1861da177e4SLinus Torvalds 187e6848976SArnaldo Carvalho de Melo /* 188e6848976SArnaldo Carvalho de Melo * Sock is moving from IPv6 to IPv4 (sk_prot), so 189e6848976SArnaldo Carvalho de Melo * remove it from the refcnt debug socks count in the 190e6848976SArnaldo Carvalho de Melo * original family... 191e6848976SArnaldo Carvalho de Melo */ 192e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_dec(sk); 193e6848976SArnaldo Carvalho de Melo 1941da177e4SLinus Torvalds if (sk->sk_protocol == IPPROTO_TCP) { 195d83d8461SArnaldo Carvalho de Melo struct inet_connection_sock *icsk = inet_csk(sk); 1961da177e4SLinus Torvalds local_bh_disable(); 197c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, sk->sk_prot, -1); 198c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, &tcp_prot, 1); 1991da177e4SLinus Torvalds local_bh_enable(); 2001da177e4SLinus Torvalds sk->sk_prot = &tcp_prot; 201d83d8461SArnaldo Carvalho de Melo icsk->icsk_af_ops = &ipv4_specific; 2021da177e4SLinus Torvalds sk->sk_socket->ops = &inet_stream_ops; 2031da177e4SLinus Torvalds sk->sk_family = PF_INET; 204d83d8461SArnaldo Carvalho de Melo tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); 2051da177e4SLinus Torvalds } else { 206ba4e58ecSGerrit Renker struct proto *prot = &udp_prot; 207ba4e58ecSGerrit Renker 208db8dac20SDavid S. Miller if (sk->sk_protocol == IPPROTO_UDPLITE) 209ba4e58ecSGerrit Renker prot = &udplite_prot; 2101da177e4SLinus Torvalds local_bh_disable(); 211c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, sk->sk_prot, -1); 212c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, prot, 1); 2131da177e4SLinus Torvalds local_bh_enable(); 214ba4e58ecSGerrit Renker sk->sk_prot = prot; 2151da177e4SLinus Torvalds sk->sk_socket->ops = &inet_dgram_ops; 2161da177e4SLinus Torvalds sk->sk_family = PF_INET; 2171da177e4SLinus Torvalds } 2181da177e4SLinus Torvalds opt = xchg(&np->opt, NULL); 2191da177e4SLinus Torvalds if (opt) 2201da177e4SLinus Torvalds sock_kfree_s(sk, opt, opt->tot_len); 2211da177e4SLinus Torvalds pktopt = xchg(&np->pktoptions, NULL); 2221da177e4SLinus Torvalds kfree_skb(pktopt); 2231da177e4SLinus Torvalds 2241da177e4SLinus Torvalds sk->sk_destruct = inet_sock_destruct; 225e6848976SArnaldo Carvalho de Melo /* 226e6848976SArnaldo Carvalho de Melo * ... and add it to the refcnt debug socks count 227e6848976SArnaldo Carvalho de Melo * in the new family. -acme 228e6848976SArnaldo Carvalho de Melo */ 229e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_inc(sk); 2301da177e4SLinus Torvalds module_put(THIS_MODULE); 2311da177e4SLinus Torvalds retv = 0; 2321da177e4SLinus Torvalds break; 2331da177e4SLinus Torvalds } 2341da177e4SLinus Torvalds goto e_inval; 2351da177e4SLinus Torvalds 2361da177e4SLinus Torvalds case IPV6_V6ONLY: 237b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int) || 238c720c7e8SEric Dumazet inet_sk(sk)->inet_num) 2391da177e4SLinus Torvalds goto e_inval; 2401da177e4SLinus Torvalds np->ipv6only = valbool; 2411da177e4SLinus Torvalds retv = 0; 2421da177e4SLinus Torvalds break; 2431da177e4SLinus Torvalds 244333fad53SYOSHIFUJI Hideaki case IPV6_RECVPKTINFO: 245b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 246b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2471da177e4SLinus Torvalds np->rxopt.bits.rxinfo = valbool; 2481da177e4SLinus Torvalds retv = 0; 2491da177e4SLinus Torvalds break; 2501da177e4SLinus Torvalds 251333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 252b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 253b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 254333fad53SYOSHIFUJI Hideaki np->rxopt.bits.rxoinfo = valbool; 255333fad53SYOSHIFUJI Hideaki retv = 0; 256333fad53SYOSHIFUJI Hideaki break; 257333fad53SYOSHIFUJI Hideaki 258333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPLIMIT: 259b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 260b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2611da177e4SLinus Torvalds np->rxopt.bits.rxhlim = valbool; 2621da177e4SLinus Torvalds retv = 0; 2631da177e4SLinus Torvalds break; 2641da177e4SLinus Torvalds 265333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 266b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 267b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 268333fad53SYOSHIFUJI Hideaki np->rxopt.bits.rxohlim = valbool; 269333fad53SYOSHIFUJI Hideaki retv = 0; 270333fad53SYOSHIFUJI Hideaki break; 271333fad53SYOSHIFUJI Hideaki 272333fad53SYOSHIFUJI Hideaki case IPV6_RECVRTHDR: 273b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 274b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2754c752098SYOSHIFUJI Hideaki np->rxopt.bits.srcrt = valbool; 2761da177e4SLinus Torvalds retv = 0; 2771da177e4SLinus Torvalds break; 2781da177e4SLinus Torvalds 279333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 280b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 281b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2824c752098SYOSHIFUJI Hideaki np->rxopt.bits.osrcrt = valbool; 283333fad53SYOSHIFUJI Hideaki retv = 0; 284333fad53SYOSHIFUJI Hideaki break; 285333fad53SYOSHIFUJI Hideaki 286333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPOPTS: 287b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 288b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2891da177e4SLinus Torvalds np->rxopt.bits.hopopts = valbool; 2901da177e4SLinus Torvalds retv = 0; 2911da177e4SLinus Torvalds break; 2921da177e4SLinus Torvalds 293333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 294b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 295b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 296333fad53SYOSHIFUJI Hideaki np->rxopt.bits.ohopopts = valbool; 297333fad53SYOSHIFUJI Hideaki retv = 0; 298333fad53SYOSHIFUJI Hideaki break; 299333fad53SYOSHIFUJI Hideaki 300333fad53SYOSHIFUJI Hideaki case IPV6_RECVDSTOPTS: 301b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 302b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 3031da177e4SLinus Torvalds np->rxopt.bits.dstopts = valbool; 3041da177e4SLinus Torvalds retv = 0; 3051da177e4SLinus Torvalds break; 3061da177e4SLinus Torvalds 307333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 308b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 309b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 310333fad53SYOSHIFUJI Hideaki np->rxopt.bits.odstopts = valbool; 311333fad53SYOSHIFUJI Hideaki retv = 0; 312333fad53SYOSHIFUJI Hideaki break; 313333fad53SYOSHIFUJI Hideaki 31441a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 315b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 316b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 317d0ee011fSRemi Denis-Courmont if (val < -1 || val > 0xff) 31841a1f8eaSYOSHIFUJI Hideaki goto e_inval; 31926ced1e4SGerrit Renker /* RFC 3542, 6.5: default traffic class of 0x0 */ 32026ced1e4SGerrit Renker if (val == -1) 32126ced1e4SGerrit Renker val = 0; 32241a1f8eaSYOSHIFUJI Hideaki np->tclass = val; 32341a1f8eaSYOSHIFUJI Hideaki retv = 0; 32441a1f8eaSYOSHIFUJI Hideaki break; 32541a1f8eaSYOSHIFUJI Hideaki 32641a1f8eaSYOSHIFUJI Hideaki case IPV6_RECVTCLASS: 327b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 328b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 32941a1f8eaSYOSHIFUJI Hideaki np->rxopt.bits.rxtclass = valbool; 33041a1f8eaSYOSHIFUJI Hideaki retv = 0; 33141a1f8eaSYOSHIFUJI Hideaki break; 33241a1f8eaSYOSHIFUJI Hideaki 3331da177e4SLinus Torvalds case IPV6_FLOWINFO: 334b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 335b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 3361da177e4SLinus Torvalds np->rxopt.bits.rxflow = valbool; 3371da177e4SLinus Torvalds retv = 0; 3381da177e4SLinus Torvalds break; 3391da177e4SLinus Torvalds 340793b1473SBrian Haley case IPV6_RECVPATHMTU: 341793b1473SBrian Haley if (optlen < sizeof(int)) 342793b1473SBrian Haley goto e_inval; 343793b1473SBrian Haley np->rxopt.bits.rxpmtu = valbool; 344793b1473SBrian Haley retv = 0; 345793b1473SBrian Haley break; 346793b1473SBrian Haley 347333fad53SYOSHIFUJI Hideaki case IPV6_HOPOPTS: 348333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 349333fad53SYOSHIFUJI Hideaki case IPV6_RTHDR: 350333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 351333fad53SYOSHIFUJI Hideaki { 352333fad53SYOSHIFUJI Hideaki struct ipv6_txoptions *opt; 353aea7427fSShan Wei 354aea7427fSShan Wei /* remove any sticky options header with a zero option 355aea7427fSShan Wei * length, per RFC3542. 356aea7427fSShan Wei */ 357333fad53SYOSHIFUJI Hideaki if (optlen == 0) 358cb422c46SLuiz Capitulino optval = NULL; 359cfb266c0SYang Hongyang else if (optval == NULL) 360cfb266c0SYang Hongyang goto e_inval; 361aea7427fSShan Wei else if (optlen < sizeof(struct ipv6_opt_hdr) || 362aea7427fSShan Wei optlen & 0x7 || optlen > 8 * 255) 363aea7427fSShan Wei goto e_inval; 364333fad53SYOSHIFUJI Hideaki 365333fad53SYOSHIFUJI Hideaki /* hop-by-hop / destination options are privileged option */ 366333fad53SYOSHIFUJI Hideaki retv = -EPERM; 367333fad53SYOSHIFUJI Hideaki if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW)) 368333fad53SYOSHIFUJI Hideaki break; 369333fad53SYOSHIFUJI Hideaki 370333fad53SYOSHIFUJI Hideaki opt = ipv6_renew_options(sk, np->opt, optname, 371333fad53SYOSHIFUJI Hideaki (struct ipv6_opt_hdr __user *)optval, 372333fad53SYOSHIFUJI Hideaki optlen); 373333fad53SYOSHIFUJI Hideaki if (IS_ERR(opt)) { 374333fad53SYOSHIFUJI Hideaki retv = PTR_ERR(opt); 375333fad53SYOSHIFUJI Hideaki break; 376333fad53SYOSHIFUJI Hideaki } 377333fad53SYOSHIFUJI Hideaki 378333fad53SYOSHIFUJI Hideaki /* routing header option needs extra check */ 3796e093d9dSBrian Haley retv = -EINVAL; 380dfee0a72SOlaf Kirch if (optname == IPV6_RTHDR && opt && opt->srcrt) { 381333fad53SYOSHIFUJI Hideaki struct ipv6_rt_hdr *rthdr = opt->srcrt; 382280a9d34SMasahide NAKAMURA switch (rthdr->type) { 38359fbb3a6SMasahide NAKAMURA #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 384280a9d34SMasahide NAKAMURA case IPV6_SRCRT_TYPE_2: 3856e093d9dSBrian Haley if (rthdr->hdrlen != 2 || 3866e093d9dSBrian Haley rthdr->segments_left != 1) 3876e093d9dSBrian Haley goto sticky_done; 3886e093d9dSBrian Haley 389280a9d34SMasahide NAKAMURA break; 390bb4dbf9eSYOSHIFUJI Hideaki #endif 391280a9d34SMasahide NAKAMURA default: 392333fad53SYOSHIFUJI Hideaki goto sticky_done; 393280a9d34SMasahide NAKAMURA } 394333fad53SYOSHIFUJI Hideaki } 395333fad53SYOSHIFUJI Hideaki 396333fad53SYOSHIFUJI Hideaki retv = 0; 397e7712f1aSYOSHIFUJI Hideaki opt = ipv6_update_options(sk, opt); 398333fad53SYOSHIFUJI Hideaki sticky_done: 399333fad53SYOSHIFUJI Hideaki if (opt) 400333fad53SYOSHIFUJI Hideaki sock_kfree_s(sk, opt, opt->tot_len); 401333fad53SYOSHIFUJI Hideaki break; 402333fad53SYOSHIFUJI Hideaki } 403333fad53SYOSHIFUJI Hideaki 404b24a2516SYang Hongyang case IPV6_PKTINFO: 405b24a2516SYang Hongyang { 406b24a2516SYang Hongyang struct in6_pktinfo pkt; 407b24a2516SYang Hongyang 408b24a2516SYang Hongyang if (optlen == 0) 409b24a2516SYang Hongyang goto e_inval; 410b24a2516SYang Hongyang else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL) 411b24a2516SYang Hongyang goto e_inval; 412b24a2516SYang Hongyang 413914d1164SIlpo Järvinen if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) { 414b24a2516SYang Hongyang retv = -EFAULT; 415b24a2516SYang Hongyang break; 416b24a2516SYang Hongyang } 417b24a2516SYang Hongyang if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if) 418b24a2516SYang Hongyang goto e_inval; 419b24a2516SYang Hongyang 420b24a2516SYang Hongyang np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex; 421b24a2516SYang Hongyang ipv6_addr_copy(&np->sticky_pktinfo.ipi6_addr, &pkt.ipi6_addr); 422b24a2516SYang Hongyang retv = 0; 423b24a2516SYang Hongyang break; 424b24a2516SYang Hongyang } 425b24a2516SYang Hongyang 426333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTOPTIONS: 4271da177e4SLinus Torvalds { 4281da177e4SLinus Torvalds struct ipv6_txoptions *opt = NULL; 4291da177e4SLinus Torvalds struct msghdr msg; 4301da177e4SLinus Torvalds struct flowi fl; 4311da177e4SLinus Torvalds int junk; 4321da177e4SLinus Torvalds 4331da177e4SLinus Torvalds fl.fl6_flowlabel = 0; 4341da177e4SLinus Torvalds fl.oif = sk->sk_bound_dev_if; 43551953d5bSBrian Haley fl.mark = sk->sk_mark; 4361da177e4SLinus Torvalds 4371da177e4SLinus Torvalds if (optlen == 0) 4381da177e4SLinus Torvalds goto update; 4391da177e4SLinus Torvalds 4401da177e4SLinus Torvalds /* 1K is probably excessive 4411da177e4SLinus Torvalds * 1K is surely not enough, 2K per standard header is 16K. 4421da177e4SLinus Torvalds */ 4431da177e4SLinus Torvalds retv = -EINVAL; 4441da177e4SLinus Torvalds if (optlen > 64*1024) 4451da177e4SLinus Torvalds break; 4461da177e4SLinus Torvalds 4471da177e4SLinus Torvalds opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); 4481da177e4SLinus Torvalds retv = -ENOBUFS; 4491da177e4SLinus Torvalds if (opt == NULL) 4501da177e4SLinus Torvalds break; 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds memset(opt, 0, sizeof(*opt)); 4531da177e4SLinus Torvalds opt->tot_len = sizeof(*opt) + optlen; 4541da177e4SLinus Torvalds retv = -EFAULT; 4551da177e4SLinus Torvalds if (copy_from_user(opt+1, optval, optlen)) 4561da177e4SLinus Torvalds goto done; 4571da177e4SLinus Torvalds 4581da177e4SLinus Torvalds msg.msg_controllen = optlen; 4591da177e4SLinus Torvalds msg.msg_control = (void*)(opt+1); 4601da177e4SLinus Torvalds 46113b52cd4SBrian Haley retv = datagram_send_ctl(net, &msg, &fl, opt, &junk, &junk, 46213b52cd4SBrian Haley &junk); 4631da177e4SLinus Torvalds if (retv) 4641da177e4SLinus Torvalds goto done; 4651da177e4SLinus Torvalds update: 4661da177e4SLinus Torvalds retv = 0; 467e7712f1aSYOSHIFUJI Hideaki opt = ipv6_update_options(sk, opt); 4681da177e4SLinus Torvalds done: 4691da177e4SLinus Torvalds if (opt) 4701da177e4SLinus Torvalds sock_kfree_s(sk, opt, opt->tot_len); 4711da177e4SLinus Torvalds break; 4721da177e4SLinus Torvalds } 4731da177e4SLinus Torvalds case IPV6_UNICAST_HOPS: 474b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 475b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 4761da177e4SLinus Torvalds if (val > 255 || val < -1) 4771da177e4SLinus Torvalds goto e_inval; 4781da177e4SLinus Torvalds np->hop_limit = val; 4791da177e4SLinus Torvalds retv = 0; 4801da177e4SLinus Torvalds break; 4811da177e4SLinus Torvalds 4821da177e4SLinus Torvalds case IPV6_MULTICAST_HOPS: 4831da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM) 4841717699cSYOSHIFUJI Hideaki break; 485b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 486b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 4871da177e4SLinus Torvalds if (val > 255 || val < -1) 4881da177e4SLinus Torvalds goto e_inval; 4891da177e4SLinus Torvalds np->mcast_hops = val; 4901da177e4SLinus Torvalds retv = 0; 4911da177e4SLinus Torvalds break; 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds case IPV6_MULTICAST_LOOP: 494b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 495b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 49628d44882SYOSHIFUJI Hideaki if (val != valbool) 49728d44882SYOSHIFUJI Hideaki goto e_inval; 4981da177e4SLinus Torvalds np->mc_loop = valbool; 4991da177e4SLinus Torvalds retv = 0; 5001da177e4SLinus Torvalds break; 5011da177e4SLinus Torvalds 5021da177e4SLinus Torvalds case IPV6_MULTICAST_IF: 5031da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM) 5041717699cSYOSHIFUJI Hideaki break; 505b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 506b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 5074953f0fcSBrian Haley 5084953f0fcSBrian Haley if (val) { 50955b80503SEric Dumazet struct net_device *dev; 51055b80503SEric Dumazet 5111da177e4SLinus Torvalds if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) 5121da177e4SLinus Torvalds goto e_inval; 5131da177e4SLinus Torvalds 51455b80503SEric Dumazet dev = dev_get_by_index(net, val); 51555b80503SEric Dumazet if (!dev) { 5161da177e4SLinus Torvalds retv = -ENODEV; 5171da177e4SLinus Torvalds break; 5181da177e4SLinus Torvalds } 51955b80503SEric Dumazet dev_put(dev); 5204953f0fcSBrian Haley } 5211da177e4SLinus Torvalds np->mcast_oif = val; 5221da177e4SLinus Torvalds retv = 0; 5231da177e4SLinus Torvalds break; 5241da177e4SLinus Torvalds case IPV6_ADD_MEMBERSHIP: 5251da177e4SLinus Torvalds case IPV6_DROP_MEMBERSHIP: 5261da177e4SLinus Torvalds { 5271da177e4SLinus Torvalds struct ipv6_mreq mreq; 5281da177e4SLinus Torvalds 529a28398baSWang Chen if (optlen < sizeof(struct ipv6_mreq)) 530a28398baSWang Chen goto e_inval; 531a28398baSWang Chen 532a96fb49bSFlavio Leitner retv = -EPROTO; 533a96fb49bSFlavio Leitner if (inet_sk(sk)->is_icsk) 534a96fb49bSFlavio Leitner break; 535a96fb49bSFlavio Leitner 5361da177e4SLinus Torvalds retv = -EFAULT; 5371da177e4SLinus Torvalds if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) 5381da177e4SLinus Torvalds break; 5391da177e4SLinus Torvalds 5401da177e4SLinus Torvalds if (optname == IPV6_ADD_MEMBERSHIP) 5411da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); 5421da177e4SLinus Torvalds else 5431da177e4SLinus Torvalds retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); 5441da177e4SLinus Torvalds break; 5451da177e4SLinus Torvalds } 5461da177e4SLinus Torvalds case IPV6_JOIN_ANYCAST: 5471da177e4SLinus Torvalds case IPV6_LEAVE_ANYCAST: 5481da177e4SLinus Torvalds { 5491da177e4SLinus Torvalds struct ipv6_mreq mreq; 5501da177e4SLinus Torvalds 551a28398baSWang Chen if (optlen < sizeof(struct ipv6_mreq)) 5521da177e4SLinus Torvalds goto e_inval; 5531da177e4SLinus Torvalds 5541da177e4SLinus Torvalds retv = -EFAULT; 5551da177e4SLinus Torvalds if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) 5561da177e4SLinus Torvalds break; 5571da177e4SLinus Torvalds 5581da177e4SLinus Torvalds if (optname == IPV6_JOIN_ANYCAST) 5591da177e4SLinus Torvalds retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); 5601da177e4SLinus Torvalds else 5611da177e4SLinus Torvalds retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); 5621da177e4SLinus Torvalds break; 5631da177e4SLinus Torvalds } 5641da177e4SLinus Torvalds case MCAST_JOIN_GROUP: 5651da177e4SLinus Torvalds case MCAST_LEAVE_GROUP: 5661da177e4SLinus Torvalds { 5671da177e4SLinus Torvalds struct group_req greq; 5681da177e4SLinus Torvalds struct sockaddr_in6 *psin6; 5691da177e4SLinus Torvalds 570a28398baSWang Chen if (optlen < sizeof(struct group_req)) 571a28398baSWang Chen goto e_inval; 572a28398baSWang Chen 5731da177e4SLinus Torvalds retv = -EFAULT; 5741da177e4SLinus Torvalds if (copy_from_user(&greq, optval, sizeof(struct group_req))) 5751da177e4SLinus Torvalds break; 5761da177e4SLinus Torvalds if (greq.gr_group.ss_family != AF_INET6) { 5771da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 5781da177e4SLinus Torvalds break; 5791da177e4SLinus Torvalds } 5801da177e4SLinus Torvalds psin6 = (struct sockaddr_in6 *)&greq.gr_group; 5811da177e4SLinus Torvalds if (optname == MCAST_JOIN_GROUP) 5821da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, greq.gr_interface, 5831da177e4SLinus Torvalds &psin6->sin6_addr); 5841da177e4SLinus Torvalds else 5851da177e4SLinus Torvalds retv = ipv6_sock_mc_drop(sk, greq.gr_interface, 5861da177e4SLinus Torvalds &psin6->sin6_addr); 5871da177e4SLinus Torvalds break; 5881da177e4SLinus Torvalds } 5891da177e4SLinus Torvalds case MCAST_JOIN_SOURCE_GROUP: 5901da177e4SLinus Torvalds case MCAST_LEAVE_SOURCE_GROUP: 5911da177e4SLinus Torvalds case MCAST_BLOCK_SOURCE: 5921da177e4SLinus Torvalds case MCAST_UNBLOCK_SOURCE: 5931da177e4SLinus Torvalds { 5941da177e4SLinus Torvalds struct group_source_req greqs; 5951da177e4SLinus Torvalds int omode, add; 5961da177e4SLinus Torvalds 597a28398baSWang Chen if (optlen < sizeof(struct group_source_req)) 5981da177e4SLinus Torvalds goto e_inval; 5991da177e4SLinus Torvalds if (copy_from_user(&greqs, optval, sizeof(greqs))) { 6001da177e4SLinus Torvalds retv = -EFAULT; 6011da177e4SLinus Torvalds break; 6021da177e4SLinus Torvalds } 6031da177e4SLinus Torvalds if (greqs.gsr_group.ss_family != AF_INET6 || 6041da177e4SLinus Torvalds greqs.gsr_source.ss_family != AF_INET6) { 6051da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 6061da177e4SLinus Torvalds break; 6071da177e4SLinus Torvalds } 6081da177e4SLinus Torvalds if (optname == MCAST_BLOCK_SOURCE) { 6091da177e4SLinus Torvalds omode = MCAST_EXCLUDE; 6101da177e4SLinus Torvalds add = 1; 6111da177e4SLinus Torvalds } else if (optname == MCAST_UNBLOCK_SOURCE) { 6121da177e4SLinus Torvalds omode = MCAST_EXCLUDE; 6131da177e4SLinus Torvalds add = 0; 6141da177e4SLinus Torvalds } else if (optname == MCAST_JOIN_SOURCE_GROUP) { 6151da177e4SLinus Torvalds struct sockaddr_in6 *psin6; 6161da177e4SLinus Torvalds 6171da177e4SLinus Torvalds psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; 6181da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, 6191da177e4SLinus Torvalds &psin6->sin6_addr); 620c9e3e8b6SDavid L Stevens /* prior join w/ different source is ok */ 621c9e3e8b6SDavid L Stevens if (retv && retv != -EADDRINUSE) 6221da177e4SLinus Torvalds break; 6231da177e4SLinus Torvalds omode = MCAST_INCLUDE; 6241da177e4SLinus Torvalds add = 1; 625c9e3e8b6SDavid L Stevens } else /* MCAST_LEAVE_SOURCE_GROUP */ { 6261da177e4SLinus Torvalds omode = MCAST_INCLUDE; 6271da177e4SLinus Torvalds add = 0; 6281da177e4SLinus Torvalds } 6291da177e4SLinus Torvalds retv = ip6_mc_source(add, omode, sk, &greqs); 6301da177e4SLinus Torvalds break; 6311da177e4SLinus Torvalds } 6321da177e4SLinus Torvalds case MCAST_MSFILTER: 6331da177e4SLinus Torvalds { 6341da177e4SLinus Torvalds extern int sysctl_mld_max_msf; 6351da177e4SLinus Torvalds struct group_filter *gsf; 6361da177e4SLinus Torvalds 6371da177e4SLinus Torvalds if (optlen < GROUP_FILTER_SIZE(0)) 6381da177e4SLinus Torvalds goto e_inval; 6391da177e4SLinus Torvalds if (optlen > sysctl_optmem_max) { 6401da177e4SLinus Torvalds retv = -ENOBUFS; 6411da177e4SLinus Torvalds break; 6421da177e4SLinus Torvalds } 6438b3a7005SKris Katterjohn gsf = kmalloc(optlen,GFP_KERNEL); 644cfcabdccSStephen Hemminger if (!gsf) { 6451da177e4SLinus Torvalds retv = -ENOBUFS; 6461da177e4SLinus Torvalds break; 6471da177e4SLinus Torvalds } 6481da177e4SLinus Torvalds retv = -EFAULT; 6491da177e4SLinus Torvalds if (copy_from_user(gsf, optval, optlen)) { 6501da177e4SLinus Torvalds kfree(gsf); 6511da177e4SLinus Torvalds break; 6521da177e4SLinus Torvalds } 6531da177e4SLinus Torvalds /* numsrc >= (4G-140)/128 overflow in 32 bits */ 6541da177e4SLinus Torvalds if (gsf->gf_numsrc >= 0x1ffffffU || 6551da177e4SLinus Torvalds gsf->gf_numsrc > sysctl_mld_max_msf) { 6561da177e4SLinus Torvalds kfree(gsf); 6571da177e4SLinus Torvalds retv = -ENOBUFS; 6581da177e4SLinus Torvalds break; 6591da177e4SLinus Torvalds } 6601da177e4SLinus Torvalds if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { 6611da177e4SLinus Torvalds kfree(gsf); 6621da177e4SLinus Torvalds retv = -EINVAL; 6631da177e4SLinus Torvalds break; 6641da177e4SLinus Torvalds } 6651da177e4SLinus Torvalds retv = ip6_mc_msfilter(sk, gsf); 6661da177e4SLinus Torvalds kfree(gsf); 6671da177e4SLinus Torvalds 6681da177e4SLinus Torvalds break; 6691da177e4SLinus Torvalds } 6701da177e4SLinus Torvalds case IPV6_ROUTER_ALERT: 671b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 672b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 673725a8ff0SDenis V. Lunev retv = ip6_ra_control(sk, val); 6741da177e4SLinus Torvalds break; 6751da177e4SLinus Torvalds case IPV6_MTU_DISCOVER: 676b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 677b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 6780eae750eSJohn Dykstra if (val < IP_PMTUDISC_DONT || val > IP_PMTUDISC_PROBE) 6791da177e4SLinus Torvalds goto e_inval; 6801da177e4SLinus Torvalds np->pmtudisc = val; 6811da177e4SLinus Torvalds retv = 0; 6821da177e4SLinus Torvalds break; 6831da177e4SLinus Torvalds case IPV6_MTU: 684b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 685b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 6861da177e4SLinus Torvalds if (val && val < IPV6_MIN_MTU) 6871da177e4SLinus Torvalds goto e_inval; 6881da177e4SLinus Torvalds np->frag_size = val; 6891da177e4SLinus Torvalds retv = 0; 6901da177e4SLinus Torvalds break; 6911da177e4SLinus Torvalds case IPV6_RECVERR: 692b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 693b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 6941da177e4SLinus Torvalds np->recverr = valbool; 6951da177e4SLinus Torvalds if (!val) 6961da177e4SLinus Torvalds skb_queue_purge(&sk->sk_error_queue); 6971da177e4SLinus Torvalds retv = 0; 6981da177e4SLinus Torvalds break; 6991da177e4SLinus Torvalds case IPV6_FLOWINFO_SEND: 700b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 701b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 7021da177e4SLinus Torvalds np->sndflow = valbool; 7031da177e4SLinus Torvalds retv = 0; 7041da177e4SLinus Torvalds break; 7051da177e4SLinus Torvalds case IPV6_FLOWLABEL_MGR: 7061da177e4SLinus Torvalds retv = ipv6_flowlabel_opt(sk, optval, optlen); 7071da177e4SLinus Torvalds break; 7081da177e4SLinus Torvalds case IPV6_IPSEC_POLICY: 7091da177e4SLinus Torvalds case IPV6_XFRM_POLICY: 7106fc0b4a7SHerbert Xu retv = -EPERM; 7116fc0b4a7SHerbert Xu if (!capable(CAP_NET_ADMIN)) 7126fc0b4a7SHerbert Xu break; 7131da177e4SLinus Torvalds retv = xfrm_user_policy(sk, optname, optval, optlen); 7141da177e4SLinus Torvalds break; 7151da177e4SLinus Torvalds 7167cbca67cSYOSHIFUJI Hideaki case IPV6_ADDR_PREFERENCES: 7177cbca67cSYOSHIFUJI Hideaki { 7187cbca67cSYOSHIFUJI Hideaki unsigned int pref = 0; 7197cbca67cSYOSHIFUJI Hideaki unsigned int prefmask = ~0; 7207cbca67cSYOSHIFUJI Hideaki 721b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 722b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 723b2a9d7c2SYOSHIFUJI Hideaki 7247cbca67cSYOSHIFUJI Hideaki retv = -EINVAL; 7257cbca67cSYOSHIFUJI Hideaki 7267cbca67cSYOSHIFUJI Hideaki /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ 7277cbca67cSYOSHIFUJI Hideaki switch (val & (IPV6_PREFER_SRC_PUBLIC| 7287cbca67cSYOSHIFUJI Hideaki IPV6_PREFER_SRC_TMP| 7297cbca67cSYOSHIFUJI Hideaki IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { 7307cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_PUBLIC: 7317cbca67cSYOSHIFUJI Hideaki pref |= IPV6_PREFER_SRC_PUBLIC; 7327cbca67cSYOSHIFUJI Hideaki break; 7337cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_TMP: 7347cbca67cSYOSHIFUJI Hideaki pref |= IPV6_PREFER_SRC_TMP; 7357cbca67cSYOSHIFUJI Hideaki break; 7367cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_PUBTMP_DEFAULT: 7377cbca67cSYOSHIFUJI Hideaki break; 7387cbca67cSYOSHIFUJI Hideaki case 0: 7397cbca67cSYOSHIFUJI Hideaki goto pref_skip_pubtmp; 7407cbca67cSYOSHIFUJI Hideaki default: 7417cbca67cSYOSHIFUJI Hideaki goto e_inval; 7421da177e4SLinus Torvalds } 7437cbca67cSYOSHIFUJI Hideaki 7447cbca67cSYOSHIFUJI Hideaki prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| 7457cbca67cSYOSHIFUJI Hideaki IPV6_PREFER_SRC_TMP); 7467cbca67cSYOSHIFUJI Hideaki pref_skip_pubtmp: 7477cbca67cSYOSHIFUJI Hideaki 7487cbca67cSYOSHIFUJI Hideaki /* check HOME/COA conflicts */ 7497cbca67cSYOSHIFUJI Hideaki switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { 7507cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_HOME: 7517cbca67cSYOSHIFUJI Hideaki break; 7527cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_COA: 7537cbca67cSYOSHIFUJI Hideaki pref |= IPV6_PREFER_SRC_COA; 7547cbca67cSYOSHIFUJI Hideaki case 0: 7557cbca67cSYOSHIFUJI Hideaki goto pref_skip_coa; 7567cbca67cSYOSHIFUJI Hideaki default: 7577cbca67cSYOSHIFUJI Hideaki goto e_inval; 7587cbca67cSYOSHIFUJI Hideaki } 7597cbca67cSYOSHIFUJI Hideaki 7607cbca67cSYOSHIFUJI Hideaki prefmask &= ~IPV6_PREFER_SRC_COA; 7617cbca67cSYOSHIFUJI Hideaki pref_skip_coa: 7627cbca67cSYOSHIFUJI Hideaki 7637cbca67cSYOSHIFUJI Hideaki /* check CGA/NONCGA conflicts */ 7647cbca67cSYOSHIFUJI Hideaki switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { 7657cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_CGA: 7667cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_NONCGA: 7677cbca67cSYOSHIFUJI Hideaki case 0: 7687cbca67cSYOSHIFUJI Hideaki break; 7697cbca67cSYOSHIFUJI Hideaki default: 7707cbca67cSYOSHIFUJI Hideaki goto e_inval; 7717cbca67cSYOSHIFUJI Hideaki } 7727cbca67cSYOSHIFUJI Hideaki 7737cbca67cSYOSHIFUJI Hideaki np->srcprefs = (np->srcprefs & prefmask) | pref; 7747cbca67cSYOSHIFUJI Hideaki retv = 0; 7757cbca67cSYOSHIFUJI Hideaki 7767cbca67cSYOSHIFUJI Hideaki break; 7777cbca67cSYOSHIFUJI Hideaki } 778e802af9cSStephen Hemminger case IPV6_MINHOPCOUNT: 779e802af9cSStephen Hemminger if (optlen < sizeof(int)) 780e802af9cSStephen Hemminger goto e_inval; 781e802af9cSStephen Hemminger if (val < 0 || val > 255) 782e802af9cSStephen Hemminger goto e_inval; 783e802af9cSStephen Hemminger np->min_hopcount = val; 784793b1473SBrian Haley break; 785793b1473SBrian Haley case IPV6_DONTFRAG: 786793b1473SBrian Haley np->dontfrag = valbool; 787e802af9cSStephen Hemminger retv = 0; 788e802af9cSStephen Hemminger break; 7897cbca67cSYOSHIFUJI Hideaki } 7907cbca67cSYOSHIFUJI Hideaki 7911da177e4SLinus Torvalds release_sock(sk); 7921da177e4SLinus Torvalds 7931da177e4SLinus Torvalds return retv; 7941da177e4SLinus Torvalds 7951da177e4SLinus Torvalds e_inval: 7961da177e4SLinus Torvalds release_sock(sk); 7971da177e4SLinus Torvalds return -EINVAL; 7981da177e4SLinus Torvalds } 7991da177e4SLinus Torvalds 8003fdadf7dSDmitry Mishin int ipv6_setsockopt(struct sock *sk, int level, int optname, 801b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 8023fdadf7dSDmitry Mishin { 8033fdadf7dSDmitry Mishin int err; 8043fdadf7dSDmitry Mishin 8053fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) 8063fdadf7dSDmitry Mishin return udp_prot.setsockopt(sk, level, optname, optval, optlen); 8073fdadf7dSDmitry Mishin 8083fdadf7dSDmitry Mishin if (level != SOL_IPV6) 8093fdadf7dSDmitry Mishin return -ENOPROTOOPT; 8103fdadf7dSDmitry Mishin 8113fdadf7dSDmitry Mishin err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); 8123fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 8133fdadf7dSDmitry Mishin /* we need to exclude all possible ENOPROTOOPTs except default case */ 8143fdadf7dSDmitry Mishin if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && 8153fdadf7dSDmitry Mishin optname != IPV6_XFRM_POLICY) { 8163fdadf7dSDmitry Mishin lock_sock(sk); 8173fdadf7dSDmitry Mishin err = nf_setsockopt(sk, PF_INET6, optname, optval, 8183fdadf7dSDmitry Mishin optlen); 8193fdadf7dSDmitry Mishin release_sock(sk); 8203fdadf7dSDmitry Mishin } 8213fdadf7dSDmitry Mishin #endif 8223fdadf7dSDmitry Mishin return err; 8233fdadf7dSDmitry Mishin } 8243fdadf7dSDmitry Mishin 8257159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_setsockopt); 8263fdadf7dSDmitry Mishin 8273fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 8283fdadf7dSDmitry Mishin int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, 829b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 8303fdadf7dSDmitry Mishin { 8313fdadf7dSDmitry Mishin int err; 8323fdadf7dSDmitry Mishin 8333fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) { 834543d9cfeSArnaldo Carvalho de Melo if (udp_prot.compat_setsockopt != NULL) 835543d9cfeSArnaldo Carvalho de Melo return udp_prot.compat_setsockopt(sk, level, optname, 836543d9cfeSArnaldo Carvalho de Melo optval, optlen); 837543d9cfeSArnaldo Carvalho de Melo return udp_prot.setsockopt(sk, level, optname, optval, optlen); 8383fdadf7dSDmitry Mishin } 8393fdadf7dSDmitry Mishin 8403fdadf7dSDmitry Mishin if (level != SOL_IPV6) 8413fdadf7dSDmitry Mishin return -ENOPROTOOPT; 8423fdadf7dSDmitry Mishin 843dae50295SDavid L Stevens if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) 844dae50295SDavid L Stevens return compat_mc_setsockopt(sk, level, optname, optval, optlen, 845dae50295SDavid L Stevens ipv6_setsockopt); 846dae50295SDavid L Stevens 8473fdadf7dSDmitry Mishin err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); 8483fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 8493fdadf7dSDmitry Mishin /* we need to exclude all possible ENOPROTOOPTs except default case */ 8503fdadf7dSDmitry Mishin if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && 8513fdadf7dSDmitry Mishin optname != IPV6_XFRM_POLICY) { 8523fdadf7dSDmitry Mishin lock_sock(sk); 853543d9cfeSArnaldo Carvalho de Melo err = compat_nf_setsockopt(sk, PF_INET6, optname, 854543d9cfeSArnaldo Carvalho de Melo optval, optlen); 8553fdadf7dSDmitry Mishin release_sock(sk); 8563fdadf7dSDmitry Mishin } 8573fdadf7dSDmitry Mishin #endif 8583fdadf7dSDmitry Mishin return err; 8593fdadf7dSDmitry Mishin } 860543d9cfeSArnaldo Carvalho de Melo 861543d9cfeSArnaldo Carvalho de Melo EXPORT_SYMBOL(compat_ipv6_setsockopt); 8623fdadf7dSDmitry Mishin #endif 8633fdadf7dSDmitry Mishin 86428693079SDavid S. Miller static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, 8654c6510a7SYOSHIFUJI Hideaki int optname, char __user *optval, int len) 866333fad53SYOSHIFUJI Hideaki { 86728693079SDavid S. Miller struct ipv6_opt_hdr *hdr; 86828693079SDavid S. Miller 8694c6510a7SYOSHIFUJI Hideaki if (!opt) 870333fad53SYOSHIFUJI Hideaki return 0; 8714c6510a7SYOSHIFUJI Hideaki 8724c6510a7SYOSHIFUJI Hideaki switch(optname) { 8734c6510a7SYOSHIFUJI Hideaki case IPV6_HOPOPTS: 87428693079SDavid S. Miller hdr = opt->hopopt; 8754c6510a7SYOSHIFUJI Hideaki break; 8764c6510a7SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 8774c6510a7SYOSHIFUJI Hideaki hdr = opt->dst0opt; 8784c6510a7SYOSHIFUJI Hideaki break; 8794c6510a7SYOSHIFUJI Hideaki case IPV6_RTHDR: 8804c6510a7SYOSHIFUJI Hideaki hdr = (struct ipv6_opt_hdr *)opt->srcrt; 8814c6510a7SYOSHIFUJI Hideaki break; 8824c6510a7SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 8834c6510a7SYOSHIFUJI Hideaki hdr = opt->dst1opt; 8844c6510a7SYOSHIFUJI Hideaki break; 8854c6510a7SYOSHIFUJI Hideaki default: 8864c6510a7SYOSHIFUJI Hideaki return -EINVAL; /* should not happen */ 8874c6510a7SYOSHIFUJI Hideaki } 8884c6510a7SYOSHIFUJI Hideaki 8894c6510a7SYOSHIFUJI Hideaki if (!hdr) 8904c6510a7SYOSHIFUJI Hideaki return 0; 89128693079SDavid S. Miller 892d2b02ed9SChris Wright len = min_t(unsigned int, len, ipv6_optlen(hdr)); 893660adc6eSIlpo Järvinen if (copy_to_user(optval, hdr, len)) 894333fad53SYOSHIFUJI Hideaki return -EFAULT; 89595b496b6SYang Hongyang return len; 896333fad53SYOSHIFUJI Hideaki } 897333fad53SYOSHIFUJI Hideaki 8983fdadf7dSDmitry Mishin static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, 8991da177e4SLinus Torvalds char __user *optval, int __user *optlen) 9001da177e4SLinus Torvalds { 9011da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 9021da177e4SLinus Torvalds int len; 9031da177e4SLinus Torvalds int val; 9041da177e4SLinus Torvalds 9057bc570c8SYOSHIFUJI Hideaki if (ip6_mroute_opt(optname)) 9067bc570c8SYOSHIFUJI Hideaki return ip6_mroute_getsockopt(sk, optname, optval, optlen); 9077bc570c8SYOSHIFUJI Hideaki 9081da177e4SLinus Torvalds if (get_user(len, optlen)) 9091da177e4SLinus Torvalds return -EFAULT; 9101da177e4SLinus Torvalds switch (optname) { 9111da177e4SLinus Torvalds case IPV6_ADDRFORM: 9121da177e4SLinus Torvalds if (sk->sk_protocol != IPPROTO_UDP && 913ba4e58ecSGerrit Renker sk->sk_protocol != IPPROTO_UDPLITE && 9141da177e4SLinus Torvalds sk->sk_protocol != IPPROTO_TCP) 9151717699cSYOSHIFUJI Hideaki return -ENOPROTOOPT; 9161da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) 9171da177e4SLinus Torvalds return -ENOTCONN; 9181da177e4SLinus Torvalds val = sk->sk_family; 9191da177e4SLinus Torvalds break; 9201da177e4SLinus Torvalds case MCAST_MSFILTER: 9211da177e4SLinus Torvalds { 9221da177e4SLinus Torvalds struct group_filter gsf; 9231da177e4SLinus Torvalds int err; 9241da177e4SLinus Torvalds 9251da177e4SLinus Torvalds if (len < GROUP_FILTER_SIZE(0)) 9261da177e4SLinus Torvalds return -EINVAL; 9271da177e4SLinus Torvalds if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) 9281da177e4SLinus Torvalds return -EFAULT; 92920c61fbdSYOSHIFUJI Hideaki if (gsf.gf_group.ss_family != AF_INET6) 93020c61fbdSYOSHIFUJI Hideaki return -EADDRNOTAVAIL; 9311da177e4SLinus Torvalds lock_sock(sk); 9321da177e4SLinus Torvalds err = ip6_mc_msfget(sk, &gsf, 9331da177e4SLinus Torvalds (struct group_filter __user *)optval, optlen); 9341da177e4SLinus Torvalds release_sock(sk); 9351da177e4SLinus Torvalds return err; 9361da177e4SLinus Torvalds } 9371da177e4SLinus Torvalds 938333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTOPTIONS: 9391da177e4SLinus Torvalds { 9401da177e4SLinus Torvalds struct msghdr msg; 9411da177e4SLinus Torvalds struct sk_buff *skb; 9421da177e4SLinus Torvalds 9431da177e4SLinus Torvalds if (sk->sk_type != SOCK_STREAM) 9441da177e4SLinus Torvalds return -ENOPROTOOPT; 9451da177e4SLinus Torvalds 9461da177e4SLinus Torvalds msg.msg_control = optval; 9471da177e4SLinus Torvalds msg.msg_controllen = len; 9481da177e4SLinus Torvalds msg.msg_flags = 0; 9491da177e4SLinus Torvalds 9501da177e4SLinus Torvalds lock_sock(sk); 9511da177e4SLinus Torvalds skb = np->pktoptions; 9521da177e4SLinus Torvalds if (skb) 9531da177e4SLinus Torvalds atomic_inc(&skb->users); 9541da177e4SLinus Torvalds release_sock(sk); 9551da177e4SLinus Torvalds 9561da177e4SLinus Torvalds if (skb) { 9571da177e4SLinus Torvalds int err = datagram_recv_ctl(sk, &msg, skb); 9581da177e4SLinus Torvalds kfree_skb(skb); 9591da177e4SLinus Torvalds if (err) 9601da177e4SLinus Torvalds return err; 9611da177e4SLinus Torvalds } else { 9621da177e4SLinus Torvalds if (np->rxopt.bits.rxinfo) { 9631da177e4SLinus Torvalds struct in6_pktinfo src_info; 964f250dcdaSYang Hongyang src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : 965f250dcdaSYang Hongyang np->sticky_pktinfo.ipi6_ifindex; 966f250dcdaSYang Hongyang np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) : 967f250dcdaSYang Hongyang ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr)); 9681da177e4SLinus Torvalds put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); 9691da177e4SLinus Torvalds } 9701da177e4SLinus Torvalds if (np->rxopt.bits.rxhlim) { 9711da177e4SLinus Torvalds int hlim = np->mcast_hops; 9721da177e4SLinus Torvalds put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); 9731da177e4SLinus Torvalds } 974333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxoinfo) { 975333fad53SYOSHIFUJI Hideaki struct in6_pktinfo src_info; 976f250dcdaSYang Hongyang src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : 977f250dcdaSYang Hongyang np->sticky_pktinfo.ipi6_ifindex; 978f250dcdaSYang Hongyang np->mcast_oif? ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr) : 979f250dcdaSYang Hongyang ipv6_addr_copy(&src_info.ipi6_addr, &(np->sticky_pktinfo.ipi6_addr)); 980333fad53SYOSHIFUJI Hideaki put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); 981333fad53SYOSHIFUJI Hideaki } 982333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxohlim) { 983333fad53SYOSHIFUJI Hideaki int hlim = np->mcast_hops; 984333fad53SYOSHIFUJI Hideaki put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); 985333fad53SYOSHIFUJI Hideaki } 9861da177e4SLinus Torvalds } 9871da177e4SLinus Torvalds len -= msg.msg_controllen; 9881da177e4SLinus Torvalds return put_user(len, optlen); 9891da177e4SLinus Torvalds } 9901da177e4SLinus Torvalds case IPV6_MTU: 9911da177e4SLinus Torvalds { 9921da177e4SLinus Torvalds struct dst_entry *dst; 993b6c6712aSEric Dumazet 9941da177e4SLinus Torvalds val = 0; 995b6c6712aSEric Dumazet rcu_read_lock(); 996b6c6712aSEric Dumazet dst = __sk_dst_get(sk); 997b6c6712aSEric Dumazet if (dst) 9981da177e4SLinus Torvalds val = dst_mtu(dst); 999b6c6712aSEric Dumazet rcu_read_unlock(); 10001da177e4SLinus Torvalds if (!val) 10011da177e4SLinus Torvalds return -ENOTCONN; 10021da177e4SLinus Torvalds break; 10031da177e4SLinus Torvalds } 10041da177e4SLinus Torvalds 10051da177e4SLinus Torvalds case IPV6_V6ONLY: 10061da177e4SLinus Torvalds val = np->ipv6only; 10071da177e4SLinus Torvalds break; 10081da177e4SLinus Torvalds 1009333fad53SYOSHIFUJI Hideaki case IPV6_RECVPKTINFO: 10101da177e4SLinus Torvalds val = np->rxopt.bits.rxinfo; 10111da177e4SLinus Torvalds break; 10121da177e4SLinus Torvalds 1013333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 1014333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.rxoinfo; 1015333fad53SYOSHIFUJI Hideaki break; 1016333fad53SYOSHIFUJI Hideaki 1017333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPLIMIT: 10181da177e4SLinus Torvalds val = np->rxopt.bits.rxhlim; 10191da177e4SLinus Torvalds break; 10201da177e4SLinus Torvalds 1021333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 1022333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.rxohlim; 1023333fad53SYOSHIFUJI Hideaki break; 1024333fad53SYOSHIFUJI Hideaki 1025333fad53SYOSHIFUJI Hideaki case IPV6_RECVRTHDR: 10261da177e4SLinus Torvalds val = np->rxopt.bits.srcrt; 10271da177e4SLinus Torvalds break; 10281da177e4SLinus Torvalds 1029333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 1030333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.osrcrt; 1031333fad53SYOSHIFUJI Hideaki break; 1032333fad53SYOSHIFUJI Hideaki 10331da177e4SLinus Torvalds case IPV6_HOPOPTS: 1034333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 1035333fad53SYOSHIFUJI Hideaki case IPV6_RTHDR: 1036333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 1037333fad53SYOSHIFUJI Hideaki { 1038333fad53SYOSHIFUJI Hideaki 1039333fad53SYOSHIFUJI Hideaki lock_sock(sk); 104028693079SDavid S. Miller len = ipv6_getsockopt_sticky(sk, np->opt, 10414c6510a7SYOSHIFUJI Hideaki optname, optval, len); 1042333fad53SYOSHIFUJI Hideaki release_sock(sk); 104305335c22SYang Hongyang /* check if ipv6_getsockopt_sticky() returns err code */ 104405335c22SYang Hongyang if (len < 0) 104505335c22SYang Hongyang return len; 1046333fad53SYOSHIFUJI Hideaki return put_user(len, optlen); 1047333fad53SYOSHIFUJI Hideaki } 1048333fad53SYOSHIFUJI Hideaki 1049333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPOPTS: 10501da177e4SLinus Torvalds val = np->rxopt.bits.hopopts; 10511da177e4SLinus Torvalds break; 10521da177e4SLinus Torvalds 1053333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 1054333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.ohopopts; 1055333fad53SYOSHIFUJI Hideaki break; 1056333fad53SYOSHIFUJI Hideaki 1057333fad53SYOSHIFUJI Hideaki case IPV6_RECVDSTOPTS: 10581da177e4SLinus Torvalds val = np->rxopt.bits.dstopts; 10591da177e4SLinus Torvalds break; 10601da177e4SLinus Torvalds 1061333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 1062333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.odstopts; 1063333fad53SYOSHIFUJI Hideaki break; 1064333fad53SYOSHIFUJI Hideaki 106541a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 106641a1f8eaSYOSHIFUJI Hideaki val = np->tclass; 106741a1f8eaSYOSHIFUJI Hideaki break; 106841a1f8eaSYOSHIFUJI Hideaki 106941a1f8eaSYOSHIFUJI Hideaki case IPV6_RECVTCLASS: 107041a1f8eaSYOSHIFUJI Hideaki val = np->rxopt.bits.rxtclass; 107141a1f8eaSYOSHIFUJI Hideaki break; 107241a1f8eaSYOSHIFUJI Hideaki 10731da177e4SLinus Torvalds case IPV6_FLOWINFO: 10741da177e4SLinus Torvalds val = np->rxopt.bits.rxflow; 10751da177e4SLinus Torvalds break; 10761da177e4SLinus Torvalds 1077793b1473SBrian Haley case IPV6_RECVPATHMTU: 1078793b1473SBrian Haley val = np->rxopt.bits.rxpmtu; 1079793b1473SBrian Haley break; 1080793b1473SBrian Haley 1081793b1473SBrian Haley case IPV6_PATHMTU: 1082793b1473SBrian Haley { 1083793b1473SBrian Haley struct dst_entry *dst; 1084793b1473SBrian Haley struct ip6_mtuinfo mtuinfo; 1085793b1473SBrian Haley 1086793b1473SBrian Haley if (len < sizeof(mtuinfo)) 1087793b1473SBrian Haley return -EINVAL; 1088793b1473SBrian Haley 1089793b1473SBrian Haley len = sizeof(mtuinfo); 1090793b1473SBrian Haley memset(&mtuinfo, 0, sizeof(mtuinfo)); 1091793b1473SBrian Haley 1092793b1473SBrian Haley rcu_read_lock(); 1093793b1473SBrian Haley dst = __sk_dst_get(sk); 1094793b1473SBrian Haley if (dst) 1095793b1473SBrian Haley mtuinfo.ip6m_mtu = dst_mtu(dst); 1096793b1473SBrian Haley rcu_read_unlock(); 1097793b1473SBrian Haley if (!mtuinfo.ip6m_mtu) 1098793b1473SBrian Haley return -ENOTCONN; 1099793b1473SBrian Haley 1100793b1473SBrian Haley if (put_user(len, optlen)) 1101793b1473SBrian Haley return -EFAULT; 1102793b1473SBrian Haley if (copy_to_user(optval, &mtuinfo, len)) 1103793b1473SBrian Haley return -EFAULT; 1104793b1473SBrian Haley 1105793b1473SBrian Haley return 0; 1106793b1473SBrian Haley break; 1107793b1473SBrian Haley } 1108793b1473SBrian Haley 11091da177e4SLinus Torvalds case IPV6_UNICAST_HOPS: 11101da177e4SLinus Torvalds case IPV6_MULTICAST_HOPS: 1111befffe90SBrian Haley { 1112befffe90SBrian Haley struct dst_entry *dst; 1113befffe90SBrian Haley 1114befffe90SBrian Haley if (optname == IPV6_UNICAST_HOPS) 1115befffe90SBrian Haley val = np->hop_limit; 1116befffe90SBrian Haley else 11171da177e4SLinus Torvalds val = np->mcast_hops; 1118befffe90SBrian Haley 1119b6c6712aSEric Dumazet if (val < 0) { 1120b6c6712aSEric Dumazet rcu_read_lock(); 1121b6c6712aSEric Dumazet dst = __sk_dst_get(sk); 1122b6c6712aSEric Dumazet if (dst) 11236b75d090SYOSHIFUJI Hideaki val = ip6_dst_hoplimit(dst); 1124b6c6712aSEric Dumazet rcu_read_unlock(); 1125befffe90SBrian Haley } 1126b6c6712aSEric Dumazet 1127befffe90SBrian Haley if (val < 0) 112853b7997fSYOSHIFUJI Hideaki val = sock_net(sk)->ipv6.devconf_all->hop_limit; 11291da177e4SLinus Torvalds break; 1130befffe90SBrian Haley } 11311da177e4SLinus Torvalds 11321da177e4SLinus Torvalds case IPV6_MULTICAST_LOOP: 11331da177e4SLinus Torvalds val = np->mc_loop; 11341da177e4SLinus Torvalds break; 11351da177e4SLinus Torvalds 11361da177e4SLinus Torvalds case IPV6_MULTICAST_IF: 11371da177e4SLinus Torvalds val = np->mcast_oif; 11381da177e4SLinus Torvalds break; 11391da177e4SLinus Torvalds 11401da177e4SLinus Torvalds case IPV6_MTU_DISCOVER: 11411da177e4SLinus Torvalds val = np->pmtudisc; 11421da177e4SLinus Torvalds break; 11431da177e4SLinus Torvalds 11441da177e4SLinus Torvalds case IPV6_RECVERR: 11451da177e4SLinus Torvalds val = np->recverr; 11461da177e4SLinus Torvalds break; 11471da177e4SLinus Torvalds 11481da177e4SLinus Torvalds case IPV6_FLOWINFO_SEND: 11491da177e4SLinus Torvalds val = np->sndflow; 11501da177e4SLinus Torvalds break; 11511da177e4SLinus Torvalds 11527cbca67cSYOSHIFUJI Hideaki case IPV6_ADDR_PREFERENCES: 11537cbca67cSYOSHIFUJI Hideaki val = 0; 11547cbca67cSYOSHIFUJI Hideaki 11557cbca67cSYOSHIFUJI Hideaki if (np->srcprefs & IPV6_PREFER_SRC_TMP) 11567cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_TMP; 11577cbca67cSYOSHIFUJI Hideaki else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) 11587cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_PUBLIC; 11597cbca67cSYOSHIFUJI Hideaki else { 11607cbca67cSYOSHIFUJI Hideaki /* XXX: should we return system default? */ 11617cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; 11627cbca67cSYOSHIFUJI Hideaki } 11637cbca67cSYOSHIFUJI Hideaki 11647cbca67cSYOSHIFUJI Hideaki if (np->srcprefs & IPV6_PREFER_SRC_COA) 11657cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_COA; 11667cbca67cSYOSHIFUJI Hideaki else 11677cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_HOME; 11687cbca67cSYOSHIFUJI Hideaki break; 11697cbca67cSYOSHIFUJI Hideaki 1170e802af9cSStephen Hemminger case IPV6_MINHOPCOUNT: 1171e802af9cSStephen Hemminger val = np->min_hopcount; 1172e802af9cSStephen Hemminger break; 1173e802af9cSStephen Hemminger 1174793b1473SBrian Haley case IPV6_DONTFRAG: 1175793b1473SBrian Haley val = np->dontfrag; 1176793b1473SBrian Haley break; 1177793b1473SBrian Haley 11781da177e4SLinus Torvalds default: 1179cf6fc4a9SWei Yongjun return -ENOPROTOOPT; 11801da177e4SLinus Torvalds } 11811da177e4SLinus Torvalds len = min_t(unsigned int, sizeof(int), len); 11821da177e4SLinus Torvalds if(put_user(len, optlen)) 11831da177e4SLinus Torvalds return -EFAULT; 11841da177e4SLinus Torvalds if(copy_to_user(optval,&val,len)) 11851da177e4SLinus Torvalds return -EFAULT; 11861da177e4SLinus Torvalds return 0; 11871da177e4SLinus Torvalds } 11881da177e4SLinus Torvalds 11893fdadf7dSDmitry Mishin int ipv6_getsockopt(struct sock *sk, int level, int optname, 11903fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 11913fdadf7dSDmitry Mishin { 11923fdadf7dSDmitry Mishin int err; 11933fdadf7dSDmitry Mishin 11943fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) 11953fdadf7dSDmitry Mishin return udp_prot.getsockopt(sk, level, optname, optval, optlen); 11963fdadf7dSDmitry Mishin 11973fdadf7dSDmitry Mishin if(level != SOL_IPV6) 11983fdadf7dSDmitry Mishin return -ENOPROTOOPT; 11993fdadf7dSDmitry Mishin 12003fdadf7dSDmitry Mishin err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); 12013fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 1202cf6fc4a9SWei Yongjun /* we need to exclude all possible ENOPROTOOPTs except default case */ 1203cf6fc4a9SWei Yongjun if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { 12043fdadf7dSDmitry Mishin int len; 12053fdadf7dSDmitry Mishin 12063fdadf7dSDmitry Mishin if (get_user(len, optlen)) 12073fdadf7dSDmitry Mishin return -EFAULT; 12083fdadf7dSDmitry Mishin 12093fdadf7dSDmitry Mishin lock_sock(sk); 12103fdadf7dSDmitry Mishin err = nf_getsockopt(sk, PF_INET6, optname, optval, 12113fdadf7dSDmitry Mishin &len); 12123fdadf7dSDmitry Mishin release_sock(sk); 12133fdadf7dSDmitry Mishin if (err >= 0) 12143fdadf7dSDmitry Mishin err = put_user(len, optlen); 12153fdadf7dSDmitry Mishin } 12163fdadf7dSDmitry Mishin #endif 12173fdadf7dSDmitry Mishin return err; 12183fdadf7dSDmitry Mishin } 12193fdadf7dSDmitry Mishin 12207159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_getsockopt); 12217159039aSYOSHIFUJI Hideaki 12223fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 12233fdadf7dSDmitry Mishin int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, 12243fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 12253fdadf7dSDmitry Mishin { 12263fdadf7dSDmitry Mishin int err; 12273fdadf7dSDmitry Mishin 12283fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) { 1229543d9cfeSArnaldo Carvalho de Melo if (udp_prot.compat_getsockopt != NULL) 1230543d9cfeSArnaldo Carvalho de Melo return udp_prot.compat_getsockopt(sk, level, optname, 1231543d9cfeSArnaldo Carvalho de Melo optval, optlen); 1232543d9cfeSArnaldo Carvalho de Melo return udp_prot.getsockopt(sk, level, optname, optval, optlen); 12333fdadf7dSDmitry Mishin } 12343fdadf7dSDmitry Mishin 12353fdadf7dSDmitry Mishin if (level != SOL_IPV6) 12363fdadf7dSDmitry Mishin return -ENOPROTOOPT; 12373fdadf7dSDmitry Mishin 123880991790SPavel Emelyanov if (optname == MCAST_MSFILTER) 123980991790SPavel Emelyanov return compat_mc_getsockopt(sk, level, optname, optval, optlen, 124080991790SPavel Emelyanov ipv6_getsockopt); 124180991790SPavel Emelyanov 12423fdadf7dSDmitry Mishin err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); 12433fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 1244cf6fc4a9SWei Yongjun /* we need to exclude all possible ENOPROTOOPTs except default case */ 1245cf6fc4a9SWei Yongjun if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { 12463fdadf7dSDmitry Mishin int len; 12473fdadf7dSDmitry Mishin 12483fdadf7dSDmitry Mishin if (get_user(len, optlen)) 12493fdadf7dSDmitry Mishin return -EFAULT; 12503fdadf7dSDmitry Mishin 12513fdadf7dSDmitry Mishin lock_sock(sk); 1252543d9cfeSArnaldo Carvalho de Melo err = compat_nf_getsockopt(sk, PF_INET6, 1253543d9cfeSArnaldo Carvalho de Melo optname, optval, &len); 12543fdadf7dSDmitry Mishin release_sock(sk); 12553fdadf7dSDmitry Mishin if (err >= 0) 12563fdadf7dSDmitry Mishin err = put_user(len, optlen); 12573fdadf7dSDmitry Mishin } 12583fdadf7dSDmitry Mishin #endif 12593fdadf7dSDmitry Mishin return err; 12603fdadf7dSDmitry Mishin } 1261543d9cfeSArnaldo Carvalho de Melo 1262543d9cfeSArnaldo Carvalho de Melo EXPORT_SYMBOL(compat_ipv6_getsockopt); 12633fdadf7dSDmitry Mishin #endif 12643fdadf7dSDmitry Mishin 1265