11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * IPv6 BSD socket options interface 31da177e4SLinus Torvalds * Linux INET6 implementation 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Authors: 61da177e4SLinus Torvalds * Pedro Roque <roque@di.fc.ul.pt> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * Based on linux/net/ipv4/ip_sockglue.c 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds * $Id: ipv6_sockglue.c,v 1.41 2002/02/01 22:01:04 davem Exp $ 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 131da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 141da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 151da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 161da177e4SLinus Torvalds * 171da177e4SLinus Torvalds * FIXME: Make the setsockopt code POSIX compliant: That is 181da177e4SLinus Torvalds * 191da177e4SLinus Torvalds * o Truncate getsockopt returns 201da177e4SLinus Torvalds * o Return an optlen of the truncated length if need be 211da177e4SLinus Torvalds * 221da177e4SLinus Torvalds * Changes: 231da177e4SLinus Torvalds * David L Stevens <dlstevens@us.ibm.com>: 241da177e4SLinus Torvalds * - added multicast source filtering API for MLDv2 251da177e4SLinus Torvalds */ 261da177e4SLinus Torvalds 271da177e4SLinus Torvalds #include <linux/module.h> 284fc268d2SRandy Dunlap #include <linux/capability.h> 291da177e4SLinus Torvalds #include <linux/errno.h> 301da177e4SLinus Torvalds #include <linux/types.h> 311da177e4SLinus Torvalds #include <linux/socket.h> 321da177e4SLinus Torvalds #include <linux/sockios.h> 331da177e4SLinus Torvalds #include <linux/net.h> 341da177e4SLinus Torvalds #include <linux/in6.h> 357bc570c8SYOSHIFUJI Hideaki #include <linux/mroute6.h> 361da177e4SLinus Torvalds #include <linux/netdevice.h> 371da177e4SLinus Torvalds #include <linux/if_arp.h> 381da177e4SLinus Torvalds #include <linux/init.h> 391da177e4SLinus Torvalds #include <linux/sysctl.h> 401da177e4SLinus Torvalds #include <linux/netfilter.h> 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds #include <net/sock.h> 431da177e4SLinus Torvalds #include <net/snmp.h> 441da177e4SLinus Torvalds #include <net/ipv6.h> 451da177e4SLinus Torvalds #include <net/ndisc.h> 461da177e4SLinus Torvalds #include <net/protocol.h> 471da177e4SLinus Torvalds #include <net/transp_v6.h> 481da177e4SLinus Torvalds #include <net/ip6_route.h> 491da177e4SLinus Torvalds #include <net/addrconf.h> 501da177e4SLinus Torvalds #include <net/inet_common.h> 511da177e4SLinus Torvalds #include <net/tcp.h> 521da177e4SLinus Torvalds #include <net/udp.h> 53ba4e58ecSGerrit Renker #include <net/udplite.h> 541da177e4SLinus Torvalds #include <net/xfrm.h> 55dae50295SDavid L Stevens #include <net/compat.h> 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds #include <asm/uaccess.h> 581da177e4SLinus Torvalds 59ba89966cSEric Dumazet DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly; 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds struct ip6_ra_chain *ip6_ra_chain; 621da177e4SLinus Torvalds DEFINE_RWLOCK(ip6_ra_lock); 631da177e4SLinus Torvalds 641da177e4SLinus Torvalds int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *)) 651da177e4SLinus Torvalds { 661da177e4SLinus Torvalds struct ip6_ra_chain *ra, *new_ra, **rap; 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds /* RA packet may be delivered ONLY to IPPROTO_RAW socket */ 691da177e4SLinus Torvalds if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW) 701da177e4SLinus Torvalds return -EINVAL; 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds write_lock_bh(&ip6_ra_lock); 751da177e4SLinus Torvalds for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) { 761da177e4SLinus Torvalds if (ra->sk == sk) { 771da177e4SLinus Torvalds if (sel>=0) { 781da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 791da177e4SLinus Torvalds kfree(new_ra); 801da177e4SLinus Torvalds return -EADDRINUSE; 811da177e4SLinus Torvalds } 821da177e4SLinus Torvalds 831da177e4SLinus Torvalds *rap = ra->next; 841da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds if (ra->destructor) 871da177e4SLinus Torvalds ra->destructor(sk); 881da177e4SLinus Torvalds sock_put(sk); 891da177e4SLinus Torvalds kfree(ra); 901da177e4SLinus Torvalds return 0; 911da177e4SLinus Torvalds } 921da177e4SLinus Torvalds } 931da177e4SLinus Torvalds if (new_ra == NULL) { 941da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 951da177e4SLinus Torvalds return -ENOBUFS; 961da177e4SLinus Torvalds } 971da177e4SLinus Torvalds new_ra->sk = sk; 981da177e4SLinus Torvalds new_ra->sel = sel; 991da177e4SLinus Torvalds new_ra->destructor = destructor; 1001da177e4SLinus Torvalds new_ra->next = ra; 1011da177e4SLinus Torvalds *rap = new_ra; 1021da177e4SLinus Torvalds sock_hold(sk); 1031da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 1041da177e4SLinus Torvalds return 0; 1051da177e4SLinus Torvalds } 1061da177e4SLinus Torvalds 107e7712f1aSYOSHIFUJI Hideaki static 108e7712f1aSYOSHIFUJI Hideaki struct ipv6_txoptions *ipv6_update_options(struct sock *sk, 109e7712f1aSYOSHIFUJI Hideaki struct ipv6_txoptions *opt) 110e7712f1aSYOSHIFUJI Hideaki { 111e7712f1aSYOSHIFUJI Hideaki if (inet_sk(sk)->is_icsk) { 112e7712f1aSYOSHIFUJI Hideaki if (opt && 113e7712f1aSYOSHIFUJI Hideaki !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) && 114e7712f1aSYOSHIFUJI Hideaki inet_sk(sk)->daddr != LOOPBACK4_IPV6) { 115e7712f1aSYOSHIFUJI Hideaki struct inet_connection_sock *icsk = inet_csk(sk); 116e7712f1aSYOSHIFUJI Hideaki icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen; 117e7712f1aSYOSHIFUJI Hideaki icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); 118e7712f1aSYOSHIFUJI Hideaki } 119e7712f1aSYOSHIFUJI Hideaki opt = xchg(&inet6_sk(sk)->opt, opt); 120e7712f1aSYOSHIFUJI Hideaki } else { 121e7712f1aSYOSHIFUJI Hideaki write_lock(&sk->sk_dst_lock); 122e7712f1aSYOSHIFUJI Hideaki opt = xchg(&inet6_sk(sk)->opt, opt); 123e7712f1aSYOSHIFUJI Hideaki write_unlock(&sk->sk_dst_lock); 124e7712f1aSYOSHIFUJI Hideaki } 125e7712f1aSYOSHIFUJI Hideaki sk_dst_reset(sk); 126e7712f1aSYOSHIFUJI Hideaki 127e7712f1aSYOSHIFUJI Hideaki return opt; 128e7712f1aSYOSHIFUJI Hideaki } 129e7712f1aSYOSHIFUJI Hideaki 1303fdadf7dSDmitry Mishin static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, 1311da177e4SLinus Torvalds char __user *optval, int optlen) 1321da177e4SLinus Torvalds { 1331da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 1343b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(sk); 1351da177e4SLinus Torvalds int val, valbool; 1361da177e4SLinus Torvalds int retv = -ENOPROTOOPT; 1371da177e4SLinus Torvalds 1381da177e4SLinus Torvalds if (optval == NULL) 1391da177e4SLinus Torvalds val=0; 140b2a9d7c2SYOSHIFUJI Hideaki else { 141b2a9d7c2SYOSHIFUJI Hideaki if (optlen >= sizeof(int)) { 142b2a9d7c2SYOSHIFUJI Hideaki if (get_user(val, (int __user *) optval)) 1431da177e4SLinus Torvalds return -EFAULT; 144b2a9d7c2SYOSHIFUJI Hideaki } else 145b2a9d7c2SYOSHIFUJI Hideaki val = 0; 146b2a9d7c2SYOSHIFUJI Hideaki } 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds valbool = (val!=0); 1491da177e4SLinus Torvalds 1507bc570c8SYOSHIFUJI Hideaki if (ip6_mroute_opt(optname)) 1517bc570c8SYOSHIFUJI Hideaki return ip6_mroute_setsockopt(sk, optname, optval, optlen); 1527bc570c8SYOSHIFUJI Hideaki 1531da177e4SLinus Torvalds lock_sock(sk); 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvalds switch (optname) { 1561da177e4SLinus Torvalds 1571da177e4SLinus Torvalds case IPV6_ADDRFORM: 158b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 159b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 1601da177e4SLinus Torvalds if (val == PF_INET) { 1611da177e4SLinus Torvalds struct ipv6_txoptions *opt; 1621da177e4SLinus Torvalds struct sk_buff *pktopt; 1631da177e4SLinus Torvalds 16449d074f4SDenis V. Lunev if (sk->sk_type == SOCK_RAW) 16549d074f4SDenis V. Lunev break; 16649d074f4SDenis V. Lunev 1679596cc82SDenis V. Lunev if (sk->sk_protocol == IPPROTO_UDP || 1689596cc82SDenis V. Lunev sk->sk_protocol == IPPROTO_UDPLITE) { 1699596cc82SDenis V. Lunev struct udp_sock *up = udp_sk(sk); 1709596cc82SDenis V. Lunev if (up->pending == AF_INET6) { 1719596cc82SDenis V. Lunev retv = -EBUSY; 1729596cc82SDenis V. Lunev break; 1739596cc82SDenis V. Lunev } 1749596cc82SDenis V. Lunev } else if (sk->sk_protocol != IPPROTO_TCP) 1751da177e4SLinus Torvalds break; 1761da177e4SLinus Torvalds 1771da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) { 1781da177e4SLinus Torvalds retv = -ENOTCONN; 1791da177e4SLinus Torvalds break; 1801da177e4SLinus Torvalds } 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvalds if (ipv6_only_sock(sk) || 183e773e4faSBrian Haley !ipv6_addr_v4mapped(&np->daddr)) { 1841da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 1851da177e4SLinus Torvalds break; 1861da177e4SLinus Torvalds } 1871da177e4SLinus Torvalds 1881da177e4SLinus Torvalds fl6_free_socklist(sk); 1891da177e4SLinus Torvalds ipv6_sock_mc_close(sk); 1901da177e4SLinus Torvalds 191e6848976SArnaldo Carvalho de Melo /* 192e6848976SArnaldo Carvalho de Melo * Sock is moving from IPv6 to IPv4 (sk_prot), so 193e6848976SArnaldo Carvalho de Melo * remove it from the refcnt debug socks count in the 194e6848976SArnaldo Carvalho de Melo * original family... 195e6848976SArnaldo Carvalho de Melo */ 196e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_dec(sk); 197e6848976SArnaldo Carvalho de Melo 1981da177e4SLinus Torvalds if (sk->sk_protocol == IPPROTO_TCP) { 199d83d8461SArnaldo Carvalho de Melo struct inet_connection_sock *icsk = inet_csk(sk); 2001da177e4SLinus Torvalds local_bh_disable(); 201c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, sk->sk_prot, -1); 202c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, &tcp_prot, 1); 2031da177e4SLinus Torvalds local_bh_enable(); 2041da177e4SLinus Torvalds sk->sk_prot = &tcp_prot; 205d83d8461SArnaldo Carvalho de Melo icsk->icsk_af_ops = &ipv4_specific; 2061da177e4SLinus Torvalds sk->sk_socket->ops = &inet_stream_ops; 2071da177e4SLinus Torvalds sk->sk_family = PF_INET; 208d83d8461SArnaldo Carvalho de Melo tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); 2091da177e4SLinus Torvalds } else { 210ba4e58ecSGerrit Renker struct proto *prot = &udp_prot; 211ba4e58ecSGerrit Renker 212db8dac20SDavid S. Miller if (sk->sk_protocol == IPPROTO_UDPLITE) 213ba4e58ecSGerrit Renker prot = &udplite_prot; 2141da177e4SLinus Torvalds local_bh_disable(); 215c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, sk->sk_prot, -1); 216c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, prot, 1); 2171da177e4SLinus Torvalds local_bh_enable(); 218ba4e58ecSGerrit Renker sk->sk_prot = prot; 2191da177e4SLinus Torvalds sk->sk_socket->ops = &inet_dgram_ops; 2201da177e4SLinus Torvalds sk->sk_family = PF_INET; 2211da177e4SLinus Torvalds } 2221da177e4SLinus Torvalds opt = xchg(&np->opt, NULL); 2231da177e4SLinus Torvalds if (opt) 2241da177e4SLinus Torvalds sock_kfree_s(sk, opt, opt->tot_len); 2251da177e4SLinus Torvalds pktopt = xchg(&np->pktoptions, NULL); 2261da177e4SLinus Torvalds if (pktopt) 2271da177e4SLinus Torvalds kfree_skb(pktopt); 2281da177e4SLinus Torvalds 2291da177e4SLinus Torvalds sk->sk_destruct = inet_sock_destruct; 230e6848976SArnaldo Carvalho de Melo /* 231e6848976SArnaldo Carvalho de Melo * ... and add it to the refcnt debug socks count 232e6848976SArnaldo Carvalho de Melo * in the new family. -acme 233e6848976SArnaldo Carvalho de Melo */ 234e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_inc(sk); 2351da177e4SLinus Torvalds module_put(THIS_MODULE); 2361da177e4SLinus Torvalds retv = 0; 2371da177e4SLinus Torvalds break; 2381da177e4SLinus Torvalds } 2391da177e4SLinus Torvalds goto e_inval; 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds case IPV6_V6ONLY: 242b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int) || 243b2a9d7c2SYOSHIFUJI Hideaki inet_sk(sk)->num) 2441da177e4SLinus Torvalds goto e_inval; 2451da177e4SLinus Torvalds np->ipv6only = valbool; 2461da177e4SLinus Torvalds retv = 0; 2471da177e4SLinus Torvalds break; 2481da177e4SLinus Torvalds 249333fad53SYOSHIFUJI Hideaki case IPV6_RECVPKTINFO: 250b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 251b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2521da177e4SLinus Torvalds np->rxopt.bits.rxinfo = valbool; 2531da177e4SLinus Torvalds retv = 0; 2541da177e4SLinus Torvalds break; 2551da177e4SLinus Torvalds 256333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 257b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 258b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 259333fad53SYOSHIFUJI Hideaki np->rxopt.bits.rxoinfo = valbool; 260333fad53SYOSHIFUJI Hideaki retv = 0; 261333fad53SYOSHIFUJI Hideaki break; 262333fad53SYOSHIFUJI Hideaki 263333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPLIMIT: 264b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 265b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2661da177e4SLinus Torvalds np->rxopt.bits.rxhlim = valbool; 2671da177e4SLinus Torvalds retv = 0; 2681da177e4SLinus Torvalds break; 2691da177e4SLinus Torvalds 270333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 271b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 272b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 273333fad53SYOSHIFUJI Hideaki np->rxopt.bits.rxohlim = valbool; 274333fad53SYOSHIFUJI Hideaki retv = 0; 275333fad53SYOSHIFUJI Hideaki break; 276333fad53SYOSHIFUJI Hideaki 277333fad53SYOSHIFUJI Hideaki case IPV6_RECVRTHDR: 278b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 279b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2804c752098SYOSHIFUJI Hideaki np->rxopt.bits.srcrt = valbool; 2811da177e4SLinus Torvalds retv = 0; 2821da177e4SLinus Torvalds break; 2831da177e4SLinus Torvalds 284333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 285b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 286b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2874c752098SYOSHIFUJI Hideaki np->rxopt.bits.osrcrt = valbool; 288333fad53SYOSHIFUJI Hideaki retv = 0; 289333fad53SYOSHIFUJI Hideaki break; 290333fad53SYOSHIFUJI Hideaki 291333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPOPTS: 292b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 293b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2941da177e4SLinus Torvalds np->rxopt.bits.hopopts = valbool; 2951da177e4SLinus Torvalds retv = 0; 2961da177e4SLinus Torvalds break; 2971da177e4SLinus Torvalds 298333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 299b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 300b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 301333fad53SYOSHIFUJI Hideaki np->rxopt.bits.ohopopts = valbool; 302333fad53SYOSHIFUJI Hideaki retv = 0; 303333fad53SYOSHIFUJI Hideaki break; 304333fad53SYOSHIFUJI Hideaki 305333fad53SYOSHIFUJI Hideaki case IPV6_RECVDSTOPTS: 306b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 307b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 3081da177e4SLinus Torvalds np->rxopt.bits.dstopts = valbool; 3091da177e4SLinus Torvalds retv = 0; 3101da177e4SLinus Torvalds break; 3111da177e4SLinus Torvalds 312333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 313b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 314b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 315333fad53SYOSHIFUJI Hideaki np->rxopt.bits.odstopts = valbool; 316333fad53SYOSHIFUJI Hideaki retv = 0; 317333fad53SYOSHIFUJI Hideaki break; 318333fad53SYOSHIFUJI Hideaki 31941a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 320b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 321b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 322d0ee011fSRemi Denis-Courmont if (val < -1 || val > 0xff) 32341a1f8eaSYOSHIFUJI Hideaki goto e_inval; 32441a1f8eaSYOSHIFUJI Hideaki np->tclass = val; 32541a1f8eaSYOSHIFUJI Hideaki retv = 0; 32641a1f8eaSYOSHIFUJI Hideaki break; 32741a1f8eaSYOSHIFUJI Hideaki 32841a1f8eaSYOSHIFUJI Hideaki case IPV6_RECVTCLASS: 329b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 330b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 33141a1f8eaSYOSHIFUJI Hideaki np->rxopt.bits.rxtclass = valbool; 33241a1f8eaSYOSHIFUJI Hideaki retv = 0; 33341a1f8eaSYOSHIFUJI Hideaki break; 33441a1f8eaSYOSHIFUJI Hideaki 3351da177e4SLinus Torvalds case IPV6_FLOWINFO: 336b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 337b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 3381da177e4SLinus Torvalds np->rxopt.bits.rxflow = valbool; 3391da177e4SLinus Torvalds retv = 0; 3401da177e4SLinus Torvalds break; 3411da177e4SLinus Torvalds 342333fad53SYOSHIFUJI Hideaki case IPV6_HOPOPTS: 343333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 344333fad53SYOSHIFUJI Hideaki case IPV6_RTHDR: 345333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 346333fad53SYOSHIFUJI Hideaki { 347333fad53SYOSHIFUJI Hideaki struct ipv6_txoptions *opt; 348333fad53SYOSHIFUJI Hideaki if (optlen == 0) 349cb422c46SLuiz Capitulino optval = NULL; 350333fad53SYOSHIFUJI Hideaki 351333fad53SYOSHIFUJI Hideaki /* hop-by-hop / destination options are privileged option */ 352333fad53SYOSHIFUJI Hideaki retv = -EPERM; 353333fad53SYOSHIFUJI Hideaki if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW)) 354333fad53SYOSHIFUJI Hideaki break; 355333fad53SYOSHIFUJI Hideaki 356b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(struct ipv6_opt_hdr) || 357b2a9d7c2SYOSHIFUJI Hideaki optlen & 0x7 || optlen > 8 * 255) 358b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 359333fad53SYOSHIFUJI Hideaki 360333fad53SYOSHIFUJI Hideaki opt = ipv6_renew_options(sk, np->opt, optname, 361333fad53SYOSHIFUJI Hideaki (struct ipv6_opt_hdr __user *)optval, 362333fad53SYOSHIFUJI Hideaki optlen); 363333fad53SYOSHIFUJI Hideaki if (IS_ERR(opt)) { 364333fad53SYOSHIFUJI Hideaki retv = PTR_ERR(opt); 365333fad53SYOSHIFUJI Hideaki break; 366333fad53SYOSHIFUJI Hideaki } 367333fad53SYOSHIFUJI Hideaki 368333fad53SYOSHIFUJI Hideaki /* routing header option needs extra check */ 369dfee0a72SOlaf Kirch if (optname == IPV6_RTHDR && opt && opt->srcrt) { 370333fad53SYOSHIFUJI Hideaki struct ipv6_rt_hdr *rthdr = opt->srcrt; 371280a9d34SMasahide NAKAMURA switch (rthdr->type) { 37259fbb3a6SMasahide NAKAMURA #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 373280a9d34SMasahide NAKAMURA case IPV6_SRCRT_TYPE_2: 374280a9d34SMasahide NAKAMURA break; 375bb4dbf9eSYOSHIFUJI Hideaki #endif 376280a9d34SMasahide NAKAMURA default: 377333fad53SYOSHIFUJI Hideaki goto sticky_done; 378280a9d34SMasahide NAKAMURA } 379280a9d34SMasahide NAKAMURA 380333fad53SYOSHIFUJI Hideaki if ((rthdr->hdrlen & 1) || 381333fad53SYOSHIFUJI Hideaki (rthdr->hdrlen >> 1) != rthdr->segments_left) 382333fad53SYOSHIFUJI Hideaki goto sticky_done; 383333fad53SYOSHIFUJI Hideaki } 384333fad53SYOSHIFUJI Hideaki 385333fad53SYOSHIFUJI Hideaki retv = 0; 386e7712f1aSYOSHIFUJI Hideaki opt = ipv6_update_options(sk, opt); 387333fad53SYOSHIFUJI Hideaki sticky_done: 388333fad53SYOSHIFUJI Hideaki if (opt) 389333fad53SYOSHIFUJI Hideaki sock_kfree_s(sk, opt, opt->tot_len); 390333fad53SYOSHIFUJI Hideaki break; 391333fad53SYOSHIFUJI Hideaki } 392333fad53SYOSHIFUJI Hideaki 393333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTOPTIONS: 3941da177e4SLinus Torvalds { 3951da177e4SLinus Torvalds struct ipv6_txoptions *opt = NULL; 3961da177e4SLinus Torvalds struct msghdr msg; 3971da177e4SLinus Torvalds struct flowi fl; 3981da177e4SLinus Torvalds int junk; 3991da177e4SLinus Torvalds 4001da177e4SLinus Torvalds fl.fl6_flowlabel = 0; 4011da177e4SLinus Torvalds fl.oif = sk->sk_bound_dev_if; 4021da177e4SLinus Torvalds 4031da177e4SLinus Torvalds if (optlen == 0) 4041da177e4SLinus Torvalds goto update; 4051da177e4SLinus Torvalds 4061da177e4SLinus Torvalds /* 1K is probably excessive 4071da177e4SLinus Torvalds * 1K is surely not enough, 2K per standard header is 16K. 4081da177e4SLinus Torvalds */ 4091da177e4SLinus Torvalds retv = -EINVAL; 4101da177e4SLinus Torvalds if (optlen > 64*1024) 4111da177e4SLinus Torvalds break; 4121da177e4SLinus Torvalds 4131da177e4SLinus Torvalds opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); 4141da177e4SLinus Torvalds retv = -ENOBUFS; 4151da177e4SLinus Torvalds if (opt == NULL) 4161da177e4SLinus Torvalds break; 4171da177e4SLinus Torvalds 4181da177e4SLinus Torvalds memset(opt, 0, sizeof(*opt)); 4191da177e4SLinus Torvalds opt->tot_len = sizeof(*opt) + optlen; 4201da177e4SLinus Torvalds retv = -EFAULT; 4211da177e4SLinus Torvalds if (copy_from_user(opt+1, optval, optlen)) 4221da177e4SLinus Torvalds goto done; 4231da177e4SLinus Torvalds 4241da177e4SLinus Torvalds msg.msg_controllen = optlen; 4251da177e4SLinus Torvalds msg.msg_control = (void*)(opt+1); 4261da177e4SLinus Torvalds 42791e1908fSYOSHIFUJI Hideaki retv = datagram_send_ctl(net, &msg, &fl, opt, &junk, &junk); 4281da177e4SLinus Torvalds if (retv) 4291da177e4SLinus Torvalds goto done; 4301da177e4SLinus Torvalds update: 4311da177e4SLinus Torvalds retv = 0; 432e7712f1aSYOSHIFUJI Hideaki opt = ipv6_update_options(sk, opt); 4331da177e4SLinus Torvalds done: 4341da177e4SLinus Torvalds if (opt) 4351da177e4SLinus Torvalds sock_kfree_s(sk, opt, opt->tot_len); 4361da177e4SLinus Torvalds break; 4371da177e4SLinus Torvalds } 4381da177e4SLinus Torvalds case IPV6_UNICAST_HOPS: 439b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 440b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 4411da177e4SLinus Torvalds if (val > 255 || val < -1) 4421da177e4SLinus Torvalds goto e_inval; 4431da177e4SLinus Torvalds np->hop_limit = val; 4441da177e4SLinus Torvalds retv = 0; 4451da177e4SLinus Torvalds break; 4461da177e4SLinus Torvalds 4471da177e4SLinus Torvalds case IPV6_MULTICAST_HOPS: 4481da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM) 4491da177e4SLinus Torvalds goto e_inval; 450b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 451b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 4521da177e4SLinus Torvalds if (val > 255 || val < -1) 4531da177e4SLinus Torvalds goto e_inval; 4541da177e4SLinus Torvalds np->mcast_hops = val; 4551da177e4SLinus Torvalds retv = 0; 4561da177e4SLinus Torvalds break; 4571da177e4SLinus Torvalds 4581da177e4SLinus Torvalds case IPV6_MULTICAST_LOOP: 459b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 460b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 4611da177e4SLinus Torvalds np->mc_loop = valbool; 4621da177e4SLinus Torvalds retv = 0; 4631da177e4SLinus Torvalds break; 4641da177e4SLinus Torvalds 4651da177e4SLinus Torvalds case IPV6_MULTICAST_IF: 4661da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM) 4671da177e4SLinus Torvalds goto e_inval; 468b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 469b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 4704953f0fcSBrian Haley 4714953f0fcSBrian Haley if (val) { 4721da177e4SLinus Torvalds if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) 4731da177e4SLinus Torvalds goto e_inval; 4741da177e4SLinus Torvalds 4758a3edd80SDaniel Lezcano if (__dev_get_by_index(net, val) == NULL) { 4761da177e4SLinus Torvalds retv = -ENODEV; 4771da177e4SLinus Torvalds break; 4781da177e4SLinus Torvalds } 4794953f0fcSBrian Haley } 4801da177e4SLinus Torvalds np->mcast_oif = val; 4811da177e4SLinus Torvalds retv = 0; 4821da177e4SLinus Torvalds break; 4831da177e4SLinus Torvalds case IPV6_ADD_MEMBERSHIP: 4841da177e4SLinus Torvalds case IPV6_DROP_MEMBERSHIP: 4851da177e4SLinus Torvalds { 4861da177e4SLinus Torvalds struct ipv6_mreq mreq; 4871da177e4SLinus Torvalds 488a28398baSWang Chen if (optlen < sizeof(struct ipv6_mreq)) 489a28398baSWang Chen goto e_inval; 490a28398baSWang Chen 491a96fb49bSFlavio Leitner retv = -EPROTO; 492a96fb49bSFlavio Leitner if (inet_sk(sk)->is_icsk) 493a96fb49bSFlavio Leitner break; 494a96fb49bSFlavio Leitner 4951da177e4SLinus Torvalds retv = -EFAULT; 4961da177e4SLinus Torvalds if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) 4971da177e4SLinus Torvalds break; 4981da177e4SLinus Torvalds 4991da177e4SLinus Torvalds if (optname == IPV6_ADD_MEMBERSHIP) 5001da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); 5011da177e4SLinus Torvalds else 5021da177e4SLinus Torvalds retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); 5031da177e4SLinus Torvalds break; 5041da177e4SLinus Torvalds } 5051da177e4SLinus Torvalds case IPV6_JOIN_ANYCAST: 5061da177e4SLinus Torvalds case IPV6_LEAVE_ANYCAST: 5071da177e4SLinus Torvalds { 5081da177e4SLinus Torvalds struct ipv6_mreq mreq; 5091da177e4SLinus Torvalds 510a28398baSWang Chen if (optlen < sizeof(struct ipv6_mreq)) 5111da177e4SLinus Torvalds goto e_inval; 5121da177e4SLinus Torvalds 5131da177e4SLinus Torvalds retv = -EFAULT; 5141da177e4SLinus Torvalds if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) 5151da177e4SLinus Torvalds break; 5161da177e4SLinus Torvalds 5171da177e4SLinus Torvalds if (optname == IPV6_JOIN_ANYCAST) 5181da177e4SLinus Torvalds retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); 5191da177e4SLinus Torvalds else 5201da177e4SLinus Torvalds retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); 5211da177e4SLinus Torvalds break; 5221da177e4SLinus Torvalds } 5231da177e4SLinus Torvalds case MCAST_JOIN_GROUP: 5241da177e4SLinus Torvalds case MCAST_LEAVE_GROUP: 5251da177e4SLinus Torvalds { 5261da177e4SLinus Torvalds struct group_req greq; 5271da177e4SLinus Torvalds struct sockaddr_in6 *psin6; 5281da177e4SLinus Torvalds 529a28398baSWang Chen if (optlen < sizeof(struct group_req)) 530a28398baSWang Chen goto e_inval; 531a28398baSWang Chen 5321da177e4SLinus Torvalds retv = -EFAULT; 5331da177e4SLinus Torvalds if (copy_from_user(&greq, optval, sizeof(struct group_req))) 5341da177e4SLinus Torvalds break; 5351da177e4SLinus Torvalds if (greq.gr_group.ss_family != AF_INET6) { 5361da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 5371da177e4SLinus Torvalds break; 5381da177e4SLinus Torvalds } 5391da177e4SLinus Torvalds psin6 = (struct sockaddr_in6 *)&greq.gr_group; 5401da177e4SLinus Torvalds if (optname == MCAST_JOIN_GROUP) 5411da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, greq.gr_interface, 5421da177e4SLinus Torvalds &psin6->sin6_addr); 5431da177e4SLinus Torvalds else 5441da177e4SLinus Torvalds retv = ipv6_sock_mc_drop(sk, greq.gr_interface, 5451da177e4SLinus Torvalds &psin6->sin6_addr); 5461da177e4SLinus Torvalds break; 5471da177e4SLinus Torvalds } 5481da177e4SLinus Torvalds case MCAST_JOIN_SOURCE_GROUP: 5491da177e4SLinus Torvalds case MCAST_LEAVE_SOURCE_GROUP: 5501da177e4SLinus Torvalds case MCAST_BLOCK_SOURCE: 5511da177e4SLinus Torvalds case MCAST_UNBLOCK_SOURCE: 5521da177e4SLinus Torvalds { 5531da177e4SLinus Torvalds struct group_source_req greqs; 5541da177e4SLinus Torvalds int omode, add; 5551da177e4SLinus Torvalds 556a28398baSWang Chen if (optlen < sizeof(struct group_source_req)) 5571da177e4SLinus Torvalds goto e_inval; 5581da177e4SLinus Torvalds if (copy_from_user(&greqs, optval, sizeof(greqs))) { 5591da177e4SLinus Torvalds retv = -EFAULT; 5601da177e4SLinus Torvalds break; 5611da177e4SLinus Torvalds } 5621da177e4SLinus Torvalds if (greqs.gsr_group.ss_family != AF_INET6 || 5631da177e4SLinus Torvalds greqs.gsr_source.ss_family != AF_INET6) { 5641da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 5651da177e4SLinus Torvalds break; 5661da177e4SLinus Torvalds } 5671da177e4SLinus Torvalds if (optname == MCAST_BLOCK_SOURCE) { 5681da177e4SLinus Torvalds omode = MCAST_EXCLUDE; 5691da177e4SLinus Torvalds add = 1; 5701da177e4SLinus Torvalds } else if (optname == MCAST_UNBLOCK_SOURCE) { 5711da177e4SLinus Torvalds omode = MCAST_EXCLUDE; 5721da177e4SLinus Torvalds add = 0; 5731da177e4SLinus Torvalds } else if (optname == MCAST_JOIN_SOURCE_GROUP) { 5741da177e4SLinus Torvalds struct sockaddr_in6 *psin6; 5751da177e4SLinus Torvalds 5761da177e4SLinus Torvalds psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; 5771da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, 5781da177e4SLinus Torvalds &psin6->sin6_addr); 579c9e3e8b6SDavid L Stevens /* prior join w/ different source is ok */ 580c9e3e8b6SDavid L Stevens if (retv && retv != -EADDRINUSE) 5811da177e4SLinus Torvalds break; 5821da177e4SLinus Torvalds omode = MCAST_INCLUDE; 5831da177e4SLinus Torvalds add = 1; 584c9e3e8b6SDavid L Stevens } else /* MCAST_LEAVE_SOURCE_GROUP */ { 5851da177e4SLinus Torvalds omode = MCAST_INCLUDE; 5861da177e4SLinus Torvalds add = 0; 5871da177e4SLinus Torvalds } 5881da177e4SLinus Torvalds retv = ip6_mc_source(add, omode, sk, &greqs); 5891da177e4SLinus Torvalds break; 5901da177e4SLinus Torvalds } 5911da177e4SLinus Torvalds case MCAST_MSFILTER: 5921da177e4SLinus Torvalds { 5931da177e4SLinus Torvalds extern int sysctl_mld_max_msf; 5941da177e4SLinus Torvalds struct group_filter *gsf; 5951da177e4SLinus Torvalds 5961da177e4SLinus Torvalds if (optlen < GROUP_FILTER_SIZE(0)) 5971da177e4SLinus Torvalds goto e_inval; 5981da177e4SLinus Torvalds if (optlen > sysctl_optmem_max) { 5991da177e4SLinus Torvalds retv = -ENOBUFS; 6001da177e4SLinus Torvalds break; 6011da177e4SLinus Torvalds } 6028b3a7005SKris Katterjohn gsf = kmalloc(optlen,GFP_KERNEL); 603cfcabdccSStephen Hemminger if (!gsf) { 6041da177e4SLinus Torvalds retv = -ENOBUFS; 6051da177e4SLinus Torvalds break; 6061da177e4SLinus Torvalds } 6071da177e4SLinus Torvalds retv = -EFAULT; 6081da177e4SLinus Torvalds if (copy_from_user(gsf, optval, optlen)) { 6091da177e4SLinus Torvalds kfree(gsf); 6101da177e4SLinus Torvalds break; 6111da177e4SLinus Torvalds } 6121da177e4SLinus Torvalds /* numsrc >= (4G-140)/128 overflow in 32 bits */ 6131da177e4SLinus Torvalds if (gsf->gf_numsrc >= 0x1ffffffU || 6141da177e4SLinus Torvalds gsf->gf_numsrc > sysctl_mld_max_msf) { 6151da177e4SLinus Torvalds kfree(gsf); 6161da177e4SLinus Torvalds retv = -ENOBUFS; 6171da177e4SLinus Torvalds break; 6181da177e4SLinus Torvalds } 6191da177e4SLinus Torvalds if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { 6201da177e4SLinus Torvalds kfree(gsf); 6211da177e4SLinus Torvalds retv = -EINVAL; 6221da177e4SLinus Torvalds break; 6231da177e4SLinus Torvalds } 6241da177e4SLinus Torvalds retv = ip6_mc_msfilter(sk, gsf); 6251da177e4SLinus Torvalds kfree(gsf); 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds break; 6281da177e4SLinus Torvalds } 6291da177e4SLinus Torvalds case IPV6_ROUTER_ALERT: 630b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 631b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 6321da177e4SLinus Torvalds retv = ip6_ra_control(sk, val, NULL); 6331da177e4SLinus Torvalds break; 6341da177e4SLinus Torvalds case IPV6_MTU_DISCOVER: 635b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 636b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 637628a5c56SJohn Heffner if (val<0 || val>3) 6381da177e4SLinus Torvalds goto e_inval; 6391da177e4SLinus Torvalds np->pmtudisc = val; 6401da177e4SLinus Torvalds retv = 0; 6411da177e4SLinus Torvalds break; 6421da177e4SLinus Torvalds case IPV6_MTU: 643b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 644b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 6451da177e4SLinus Torvalds if (val && val < IPV6_MIN_MTU) 6461da177e4SLinus Torvalds goto e_inval; 6471da177e4SLinus Torvalds np->frag_size = val; 6481da177e4SLinus Torvalds retv = 0; 6491da177e4SLinus Torvalds break; 6501da177e4SLinus Torvalds case IPV6_RECVERR: 651b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 652b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 6531da177e4SLinus Torvalds np->recverr = valbool; 6541da177e4SLinus Torvalds if (!val) 6551da177e4SLinus Torvalds skb_queue_purge(&sk->sk_error_queue); 6561da177e4SLinus Torvalds retv = 0; 6571da177e4SLinus Torvalds break; 6581da177e4SLinus Torvalds case IPV6_FLOWINFO_SEND: 659b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 660b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 6611da177e4SLinus Torvalds np->sndflow = valbool; 6621da177e4SLinus Torvalds retv = 0; 6631da177e4SLinus Torvalds break; 6641da177e4SLinus Torvalds case IPV6_FLOWLABEL_MGR: 6651da177e4SLinus Torvalds retv = ipv6_flowlabel_opt(sk, optval, optlen); 6661da177e4SLinus Torvalds break; 6671da177e4SLinus Torvalds case IPV6_IPSEC_POLICY: 6681da177e4SLinus Torvalds case IPV6_XFRM_POLICY: 6696fc0b4a7SHerbert Xu retv = -EPERM; 6706fc0b4a7SHerbert Xu if (!capable(CAP_NET_ADMIN)) 6716fc0b4a7SHerbert Xu break; 6721da177e4SLinus Torvalds retv = xfrm_user_policy(sk, optname, optval, optlen); 6731da177e4SLinus Torvalds break; 6741da177e4SLinus Torvalds 6757cbca67cSYOSHIFUJI Hideaki case IPV6_ADDR_PREFERENCES: 6767cbca67cSYOSHIFUJI Hideaki { 6777cbca67cSYOSHIFUJI Hideaki unsigned int pref = 0; 6787cbca67cSYOSHIFUJI Hideaki unsigned int prefmask = ~0; 6797cbca67cSYOSHIFUJI Hideaki 680b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 681b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 682b2a9d7c2SYOSHIFUJI Hideaki 6837cbca67cSYOSHIFUJI Hideaki retv = -EINVAL; 6847cbca67cSYOSHIFUJI Hideaki 6857cbca67cSYOSHIFUJI Hideaki /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ 6867cbca67cSYOSHIFUJI Hideaki switch (val & (IPV6_PREFER_SRC_PUBLIC| 6877cbca67cSYOSHIFUJI Hideaki IPV6_PREFER_SRC_TMP| 6887cbca67cSYOSHIFUJI Hideaki IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { 6897cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_PUBLIC: 6907cbca67cSYOSHIFUJI Hideaki pref |= IPV6_PREFER_SRC_PUBLIC; 6917cbca67cSYOSHIFUJI Hideaki break; 6927cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_TMP: 6937cbca67cSYOSHIFUJI Hideaki pref |= IPV6_PREFER_SRC_TMP; 6947cbca67cSYOSHIFUJI Hideaki break; 6957cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_PUBTMP_DEFAULT: 6967cbca67cSYOSHIFUJI Hideaki break; 6977cbca67cSYOSHIFUJI Hideaki case 0: 6987cbca67cSYOSHIFUJI Hideaki goto pref_skip_pubtmp; 6997cbca67cSYOSHIFUJI Hideaki default: 7007cbca67cSYOSHIFUJI Hideaki goto e_inval; 7011da177e4SLinus Torvalds } 7027cbca67cSYOSHIFUJI Hideaki 7037cbca67cSYOSHIFUJI Hideaki prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| 7047cbca67cSYOSHIFUJI Hideaki IPV6_PREFER_SRC_TMP); 7057cbca67cSYOSHIFUJI Hideaki pref_skip_pubtmp: 7067cbca67cSYOSHIFUJI Hideaki 7077cbca67cSYOSHIFUJI Hideaki /* check HOME/COA conflicts */ 7087cbca67cSYOSHIFUJI Hideaki switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { 7097cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_HOME: 7107cbca67cSYOSHIFUJI Hideaki break; 7117cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_COA: 7127cbca67cSYOSHIFUJI Hideaki pref |= IPV6_PREFER_SRC_COA; 7137cbca67cSYOSHIFUJI Hideaki case 0: 7147cbca67cSYOSHIFUJI Hideaki goto pref_skip_coa; 7157cbca67cSYOSHIFUJI Hideaki default: 7167cbca67cSYOSHIFUJI Hideaki goto e_inval; 7177cbca67cSYOSHIFUJI Hideaki } 7187cbca67cSYOSHIFUJI Hideaki 7197cbca67cSYOSHIFUJI Hideaki prefmask &= ~IPV6_PREFER_SRC_COA; 7207cbca67cSYOSHIFUJI Hideaki pref_skip_coa: 7217cbca67cSYOSHIFUJI Hideaki 7227cbca67cSYOSHIFUJI Hideaki /* check CGA/NONCGA conflicts */ 7237cbca67cSYOSHIFUJI Hideaki switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { 7247cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_CGA: 7257cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_NONCGA: 7267cbca67cSYOSHIFUJI Hideaki case 0: 7277cbca67cSYOSHIFUJI Hideaki break; 7287cbca67cSYOSHIFUJI Hideaki default: 7297cbca67cSYOSHIFUJI Hideaki goto e_inval; 7307cbca67cSYOSHIFUJI Hideaki } 7317cbca67cSYOSHIFUJI Hideaki 7327cbca67cSYOSHIFUJI Hideaki np->srcprefs = (np->srcprefs & prefmask) | pref; 7337cbca67cSYOSHIFUJI Hideaki retv = 0; 7347cbca67cSYOSHIFUJI Hideaki 7357cbca67cSYOSHIFUJI Hideaki break; 7367cbca67cSYOSHIFUJI Hideaki } 7377cbca67cSYOSHIFUJI Hideaki } 7387cbca67cSYOSHIFUJI Hideaki 7391da177e4SLinus Torvalds release_sock(sk); 7401da177e4SLinus Torvalds 7411da177e4SLinus Torvalds return retv; 7421da177e4SLinus Torvalds 7431da177e4SLinus Torvalds e_inval: 7441da177e4SLinus Torvalds release_sock(sk); 7451da177e4SLinus Torvalds return -EINVAL; 7461da177e4SLinus Torvalds } 7471da177e4SLinus Torvalds 7483fdadf7dSDmitry Mishin int ipv6_setsockopt(struct sock *sk, int level, int optname, 7493fdadf7dSDmitry Mishin char __user *optval, int optlen) 7503fdadf7dSDmitry Mishin { 7513fdadf7dSDmitry Mishin int err; 7523fdadf7dSDmitry Mishin 7533fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) 7543fdadf7dSDmitry Mishin return udp_prot.setsockopt(sk, level, optname, optval, optlen); 7553fdadf7dSDmitry Mishin 7563fdadf7dSDmitry Mishin if (level != SOL_IPV6) 7573fdadf7dSDmitry Mishin return -ENOPROTOOPT; 7583fdadf7dSDmitry Mishin 7593fdadf7dSDmitry Mishin err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); 7603fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 7613fdadf7dSDmitry Mishin /* we need to exclude all possible ENOPROTOOPTs except default case */ 7623fdadf7dSDmitry Mishin if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && 7633fdadf7dSDmitry Mishin optname != IPV6_XFRM_POLICY) { 7643fdadf7dSDmitry Mishin lock_sock(sk); 7653fdadf7dSDmitry Mishin err = nf_setsockopt(sk, PF_INET6, optname, optval, 7663fdadf7dSDmitry Mishin optlen); 7673fdadf7dSDmitry Mishin release_sock(sk); 7683fdadf7dSDmitry Mishin } 7693fdadf7dSDmitry Mishin #endif 7703fdadf7dSDmitry Mishin return err; 7713fdadf7dSDmitry Mishin } 7723fdadf7dSDmitry Mishin 7737159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_setsockopt); 7743fdadf7dSDmitry Mishin 7753fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 7763fdadf7dSDmitry Mishin int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, 7773fdadf7dSDmitry Mishin char __user *optval, int optlen) 7783fdadf7dSDmitry Mishin { 7793fdadf7dSDmitry Mishin int err; 7803fdadf7dSDmitry Mishin 7813fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) { 782543d9cfeSArnaldo Carvalho de Melo if (udp_prot.compat_setsockopt != NULL) 783543d9cfeSArnaldo Carvalho de Melo return udp_prot.compat_setsockopt(sk, level, optname, 784543d9cfeSArnaldo Carvalho de Melo optval, optlen); 785543d9cfeSArnaldo Carvalho de Melo return udp_prot.setsockopt(sk, level, optname, optval, optlen); 7863fdadf7dSDmitry Mishin } 7873fdadf7dSDmitry Mishin 7883fdadf7dSDmitry Mishin if (level != SOL_IPV6) 7893fdadf7dSDmitry Mishin return -ENOPROTOOPT; 7903fdadf7dSDmitry Mishin 791dae50295SDavid L Stevens if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) 792dae50295SDavid L Stevens return compat_mc_setsockopt(sk, level, optname, optval, optlen, 793dae50295SDavid L Stevens ipv6_setsockopt); 794dae50295SDavid L Stevens 7953fdadf7dSDmitry Mishin err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); 7963fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 7973fdadf7dSDmitry Mishin /* we need to exclude all possible ENOPROTOOPTs except default case */ 7983fdadf7dSDmitry Mishin if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && 7993fdadf7dSDmitry Mishin optname != IPV6_XFRM_POLICY) { 8003fdadf7dSDmitry Mishin lock_sock(sk); 801543d9cfeSArnaldo Carvalho de Melo err = compat_nf_setsockopt(sk, PF_INET6, optname, 802543d9cfeSArnaldo Carvalho de Melo optval, optlen); 8033fdadf7dSDmitry Mishin release_sock(sk); 8043fdadf7dSDmitry Mishin } 8053fdadf7dSDmitry Mishin #endif 8063fdadf7dSDmitry Mishin return err; 8073fdadf7dSDmitry Mishin } 808543d9cfeSArnaldo Carvalho de Melo 809543d9cfeSArnaldo Carvalho de Melo EXPORT_SYMBOL(compat_ipv6_setsockopt); 8103fdadf7dSDmitry Mishin #endif 8113fdadf7dSDmitry Mishin 81228693079SDavid S. Miller static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, 8134c6510a7SYOSHIFUJI Hideaki int optname, char __user *optval, int len) 814333fad53SYOSHIFUJI Hideaki { 81528693079SDavid S. Miller struct ipv6_opt_hdr *hdr; 81628693079SDavid S. Miller 8174c6510a7SYOSHIFUJI Hideaki if (!opt) 818333fad53SYOSHIFUJI Hideaki return 0; 8194c6510a7SYOSHIFUJI Hideaki 8204c6510a7SYOSHIFUJI Hideaki switch(optname) { 8214c6510a7SYOSHIFUJI Hideaki case IPV6_HOPOPTS: 82228693079SDavid S. Miller hdr = opt->hopopt; 8234c6510a7SYOSHIFUJI Hideaki break; 8244c6510a7SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 8254c6510a7SYOSHIFUJI Hideaki hdr = opt->dst0opt; 8264c6510a7SYOSHIFUJI Hideaki break; 8274c6510a7SYOSHIFUJI Hideaki case IPV6_RTHDR: 8284c6510a7SYOSHIFUJI Hideaki hdr = (struct ipv6_opt_hdr *)opt->srcrt; 8294c6510a7SYOSHIFUJI Hideaki break; 8304c6510a7SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 8314c6510a7SYOSHIFUJI Hideaki hdr = opt->dst1opt; 8324c6510a7SYOSHIFUJI Hideaki break; 8334c6510a7SYOSHIFUJI Hideaki default: 8344c6510a7SYOSHIFUJI Hideaki return -EINVAL; /* should not happen */ 8354c6510a7SYOSHIFUJI Hideaki } 8364c6510a7SYOSHIFUJI Hideaki 8374c6510a7SYOSHIFUJI Hideaki if (!hdr) 8384c6510a7SYOSHIFUJI Hideaki return 0; 83928693079SDavid S. Miller 840d2b02ed9SChris Wright len = min_t(unsigned int, len, ipv6_optlen(hdr)); 841660adc6eSIlpo Järvinen if (copy_to_user(optval, hdr, len)) 842333fad53SYOSHIFUJI Hideaki return -EFAULT; 84395b496b6SYang Hongyang return len; 844333fad53SYOSHIFUJI Hideaki } 845333fad53SYOSHIFUJI Hideaki 8463fdadf7dSDmitry Mishin static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, 8471da177e4SLinus Torvalds char __user *optval, int __user *optlen) 8481da177e4SLinus Torvalds { 8491da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 8501da177e4SLinus Torvalds int len; 8511da177e4SLinus Torvalds int val; 8521da177e4SLinus Torvalds 8537bc570c8SYOSHIFUJI Hideaki if (ip6_mroute_opt(optname)) 8547bc570c8SYOSHIFUJI Hideaki return ip6_mroute_getsockopt(sk, optname, optval, optlen); 8557bc570c8SYOSHIFUJI Hideaki 8561da177e4SLinus Torvalds if (get_user(len, optlen)) 8571da177e4SLinus Torvalds return -EFAULT; 8581da177e4SLinus Torvalds switch (optname) { 8591da177e4SLinus Torvalds case IPV6_ADDRFORM: 8601da177e4SLinus Torvalds if (sk->sk_protocol != IPPROTO_UDP && 861ba4e58ecSGerrit Renker sk->sk_protocol != IPPROTO_UDPLITE && 8621da177e4SLinus Torvalds sk->sk_protocol != IPPROTO_TCP) 8631da177e4SLinus Torvalds return -EINVAL; 8641da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) 8651da177e4SLinus Torvalds return -ENOTCONN; 8661da177e4SLinus Torvalds val = sk->sk_family; 8671da177e4SLinus Torvalds break; 8681da177e4SLinus Torvalds case MCAST_MSFILTER: 8691da177e4SLinus Torvalds { 8701da177e4SLinus Torvalds struct group_filter gsf; 8711da177e4SLinus Torvalds int err; 8721da177e4SLinus Torvalds 8731da177e4SLinus Torvalds if (len < GROUP_FILTER_SIZE(0)) 8741da177e4SLinus Torvalds return -EINVAL; 8751da177e4SLinus Torvalds if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) 8761da177e4SLinus Torvalds return -EFAULT; 87720c61fbdSYOSHIFUJI Hideaki if (gsf.gf_group.ss_family != AF_INET6) 87820c61fbdSYOSHIFUJI Hideaki return -EADDRNOTAVAIL; 8791da177e4SLinus Torvalds lock_sock(sk); 8801da177e4SLinus Torvalds err = ip6_mc_msfget(sk, &gsf, 8811da177e4SLinus Torvalds (struct group_filter __user *)optval, optlen); 8821da177e4SLinus Torvalds release_sock(sk); 8831da177e4SLinus Torvalds return err; 8841da177e4SLinus Torvalds } 8851da177e4SLinus Torvalds 886333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTOPTIONS: 8871da177e4SLinus Torvalds { 8881da177e4SLinus Torvalds struct msghdr msg; 8891da177e4SLinus Torvalds struct sk_buff *skb; 8901da177e4SLinus Torvalds 8911da177e4SLinus Torvalds if (sk->sk_type != SOCK_STREAM) 8921da177e4SLinus Torvalds return -ENOPROTOOPT; 8931da177e4SLinus Torvalds 8941da177e4SLinus Torvalds msg.msg_control = optval; 8951da177e4SLinus Torvalds msg.msg_controllen = len; 8961da177e4SLinus Torvalds msg.msg_flags = 0; 8971da177e4SLinus Torvalds 8981da177e4SLinus Torvalds lock_sock(sk); 8991da177e4SLinus Torvalds skb = np->pktoptions; 9001da177e4SLinus Torvalds if (skb) 9011da177e4SLinus Torvalds atomic_inc(&skb->users); 9021da177e4SLinus Torvalds release_sock(sk); 9031da177e4SLinus Torvalds 9041da177e4SLinus Torvalds if (skb) { 9051da177e4SLinus Torvalds int err = datagram_recv_ctl(sk, &msg, skb); 9061da177e4SLinus Torvalds kfree_skb(skb); 9071da177e4SLinus Torvalds if (err) 9081da177e4SLinus Torvalds return err; 9091da177e4SLinus Torvalds } else { 9101da177e4SLinus Torvalds if (np->rxopt.bits.rxinfo) { 9111da177e4SLinus Torvalds struct in6_pktinfo src_info; 9121da177e4SLinus Torvalds src_info.ipi6_ifindex = np->mcast_oif; 9131da177e4SLinus Torvalds ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); 9141da177e4SLinus Torvalds put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); 9151da177e4SLinus Torvalds } 9161da177e4SLinus Torvalds if (np->rxopt.bits.rxhlim) { 9171da177e4SLinus Torvalds int hlim = np->mcast_hops; 9181da177e4SLinus Torvalds put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); 9191da177e4SLinus Torvalds } 920333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxoinfo) { 921333fad53SYOSHIFUJI Hideaki struct in6_pktinfo src_info; 922333fad53SYOSHIFUJI Hideaki src_info.ipi6_ifindex = np->mcast_oif; 923333fad53SYOSHIFUJI Hideaki ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); 924333fad53SYOSHIFUJI Hideaki put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); 925333fad53SYOSHIFUJI Hideaki } 926333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxohlim) { 927333fad53SYOSHIFUJI Hideaki int hlim = np->mcast_hops; 928333fad53SYOSHIFUJI Hideaki put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); 929333fad53SYOSHIFUJI Hideaki } 9301da177e4SLinus Torvalds } 9311da177e4SLinus Torvalds len -= msg.msg_controllen; 9321da177e4SLinus Torvalds return put_user(len, optlen); 9331da177e4SLinus Torvalds } 9341da177e4SLinus Torvalds case IPV6_MTU: 9351da177e4SLinus Torvalds { 9361da177e4SLinus Torvalds struct dst_entry *dst; 9371da177e4SLinus Torvalds val = 0; 9381da177e4SLinus Torvalds lock_sock(sk); 9391da177e4SLinus Torvalds dst = sk_dst_get(sk); 9401da177e4SLinus Torvalds if (dst) { 9411da177e4SLinus Torvalds val = dst_mtu(dst); 9421da177e4SLinus Torvalds dst_release(dst); 9431da177e4SLinus Torvalds } 9441da177e4SLinus Torvalds release_sock(sk); 9451da177e4SLinus Torvalds if (!val) 9461da177e4SLinus Torvalds return -ENOTCONN; 9471da177e4SLinus Torvalds break; 9481da177e4SLinus Torvalds } 9491da177e4SLinus Torvalds 9501da177e4SLinus Torvalds case IPV6_V6ONLY: 9511da177e4SLinus Torvalds val = np->ipv6only; 9521da177e4SLinus Torvalds break; 9531da177e4SLinus Torvalds 954333fad53SYOSHIFUJI Hideaki case IPV6_RECVPKTINFO: 9551da177e4SLinus Torvalds val = np->rxopt.bits.rxinfo; 9561da177e4SLinus Torvalds break; 9571da177e4SLinus Torvalds 958333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 959333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.rxoinfo; 960333fad53SYOSHIFUJI Hideaki break; 961333fad53SYOSHIFUJI Hideaki 962333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPLIMIT: 9631da177e4SLinus Torvalds val = np->rxopt.bits.rxhlim; 9641da177e4SLinus Torvalds break; 9651da177e4SLinus Torvalds 966333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 967333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.rxohlim; 968333fad53SYOSHIFUJI Hideaki break; 969333fad53SYOSHIFUJI Hideaki 970333fad53SYOSHIFUJI Hideaki case IPV6_RECVRTHDR: 9711da177e4SLinus Torvalds val = np->rxopt.bits.srcrt; 9721da177e4SLinus Torvalds break; 9731da177e4SLinus Torvalds 974333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 975333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.osrcrt; 976333fad53SYOSHIFUJI Hideaki break; 977333fad53SYOSHIFUJI Hideaki 9781da177e4SLinus Torvalds case IPV6_HOPOPTS: 979333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 980333fad53SYOSHIFUJI Hideaki case IPV6_RTHDR: 981333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 982333fad53SYOSHIFUJI Hideaki { 983333fad53SYOSHIFUJI Hideaki 984333fad53SYOSHIFUJI Hideaki lock_sock(sk); 98528693079SDavid S. Miller len = ipv6_getsockopt_sticky(sk, np->opt, 9864c6510a7SYOSHIFUJI Hideaki optname, optval, len); 987333fad53SYOSHIFUJI Hideaki release_sock(sk); 98805335c22SYang Hongyang /* check if ipv6_getsockopt_sticky() returns err code */ 98905335c22SYang Hongyang if (len < 0) 99005335c22SYang Hongyang return len; 991333fad53SYOSHIFUJI Hideaki return put_user(len, optlen); 992333fad53SYOSHIFUJI Hideaki } 993333fad53SYOSHIFUJI Hideaki 994333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPOPTS: 9951da177e4SLinus Torvalds val = np->rxopt.bits.hopopts; 9961da177e4SLinus Torvalds break; 9971da177e4SLinus Torvalds 998333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 999333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.ohopopts; 1000333fad53SYOSHIFUJI Hideaki break; 1001333fad53SYOSHIFUJI Hideaki 1002333fad53SYOSHIFUJI Hideaki case IPV6_RECVDSTOPTS: 10031da177e4SLinus Torvalds val = np->rxopt.bits.dstopts; 10041da177e4SLinus Torvalds break; 10051da177e4SLinus Torvalds 1006333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 1007333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.odstopts; 1008333fad53SYOSHIFUJI Hideaki break; 1009333fad53SYOSHIFUJI Hideaki 101041a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 101141a1f8eaSYOSHIFUJI Hideaki val = np->tclass; 1012d0ee011fSRemi Denis-Courmont if (val < 0) 1013d0ee011fSRemi Denis-Courmont val = 0; 101441a1f8eaSYOSHIFUJI Hideaki break; 101541a1f8eaSYOSHIFUJI Hideaki 101641a1f8eaSYOSHIFUJI Hideaki case IPV6_RECVTCLASS: 101741a1f8eaSYOSHIFUJI Hideaki val = np->rxopt.bits.rxtclass; 101841a1f8eaSYOSHIFUJI Hideaki break; 101941a1f8eaSYOSHIFUJI Hideaki 10201da177e4SLinus Torvalds case IPV6_FLOWINFO: 10211da177e4SLinus Torvalds val = np->rxopt.bits.rxflow; 10221da177e4SLinus Torvalds break; 10231da177e4SLinus Torvalds 10241da177e4SLinus Torvalds case IPV6_UNICAST_HOPS: 10251da177e4SLinus Torvalds case IPV6_MULTICAST_HOPS: 1026befffe90SBrian Haley { 1027befffe90SBrian Haley struct dst_entry *dst; 1028befffe90SBrian Haley 1029befffe90SBrian Haley if (optname == IPV6_UNICAST_HOPS) 1030befffe90SBrian Haley val = np->hop_limit; 1031befffe90SBrian Haley else 10321da177e4SLinus Torvalds val = np->mcast_hops; 1033befffe90SBrian Haley 1034befffe90SBrian Haley dst = sk_dst_get(sk); 1035befffe90SBrian Haley if (dst) { 1036befffe90SBrian Haley if (val < 0) 10376b75d090SYOSHIFUJI Hideaki val = ip6_dst_hoplimit(dst); 1038befffe90SBrian Haley dst_release(dst); 1039befffe90SBrian Haley } 1040befffe90SBrian Haley if (val < 0) 1041befffe90SBrian Haley val = ipv6_devconf.hop_limit; 10421da177e4SLinus Torvalds break; 1043befffe90SBrian Haley } 10441da177e4SLinus Torvalds 10451da177e4SLinus Torvalds case IPV6_MULTICAST_LOOP: 10461da177e4SLinus Torvalds val = np->mc_loop; 10471da177e4SLinus Torvalds break; 10481da177e4SLinus Torvalds 10491da177e4SLinus Torvalds case IPV6_MULTICAST_IF: 10501da177e4SLinus Torvalds val = np->mcast_oif; 10511da177e4SLinus Torvalds break; 10521da177e4SLinus Torvalds 10531da177e4SLinus Torvalds case IPV6_MTU_DISCOVER: 10541da177e4SLinus Torvalds val = np->pmtudisc; 10551da177e4SLinus Torvalds break; 10561da177e4SLinus Torvalds 10571da177e4SLinus Torvalds case IPV6_RECVERR: 10581da177e4SLinus Torvalds val = np->recverr; 10591da177e4SLinus Torvalds break; 10601da177e4SLinus Torvalds 10611da177e4SLinus Torvalds case IPV6_FLOWINFO_SEND: 10621da177e4SLinus Torvalds val = np->sndflow; 10631da177e4SLinus Torvalds break; 10641da177e4SLinus Torvalds 10657cbca67cSYOSHIFUJI Hideaki case IPV6_ADDR_PREFERENCES: 10667cbca67cSYOSHIFUJI Hideaki val = 0; 10677cbca67cSYOSHIFUJI Hideaki 10687cbca67cSYOSHIFUJI Hideaki if (np->srcprefs & IPV6_PREFER_SRC_TMP) 10697cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_TMP; 10707cbca67cSYOSHIFUJI Hideaki else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) 10717cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_PUBLIC; 10727cbca67cSYOSHIFUJI Hideaki else { 10737cbca67cSYOSHIFUJI Hideaki /* XXX: should we return system default? */ 10747cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; 10757cbca67cSYOSHIFUJI Hideaki } 10767cbca67cSYOSHIFUJI Hideaki 10777cbca67cSYOSHIFUJI Hideaki if (np->srcprefs & IPV6_PREFER_SRC_COA) 10787cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_COA; 10797cbca67cSYOSHIFUJI Hideaki else 10807cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_HOME; 10817cbca67cSYOSHIFUJI Hideaki break; 10827cbca67cSYOSHIFUJI Hideaki 10831da177e4SLinus Torvalds default: 1084cf6fc4a9SWei Yongjun return -ENOPROTOOPT; 10851da177e4SLinus Torvalds } 10861da177e4SLinus Torvalds len = min_t(unsigned int, sizeof(int), len); 10871da177e4SLinus Torvalds if(put_user(len, optlen)) 10881da177e4SLinus Torvalds return -EFAULT; 10891da177e4SLinus Torvalds if(copy_to_user(optval,&val,len)) 10901da177e4SLinus Torvalds return -EFAULT; 10911da177e4SLinus Torvalds return 0; 10921da177e4SLinus Torvalds } 10931da177e4SLinus Torvalds 10943fdadf7dSDmitry Mishin int ipv6_getsockopt(struct sock *sk, int level, int optname, 10953fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 10963fdadf7dSDmitry Mishin { 10973fdadf7dSDmitry Mishin int err; 10983fdadf7dSDmitry Mishin 10993fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) 11003fdadf7dSDmitry Mishin return udp_prot.getsockopt(sk, level, optname, optval, optlen); 11013fdadf7dSDmitry Mishin 11023fdadf7dSDmitry Mishin if(level != SOL_IPV6) 11033fdadf7dSDmitry Mishin return -ENOPROTOOPT; 11043fdadf7dSDmitry Mishin 11053fdadf7dSDmitry Mishin err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); 11063fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 1107cf6fc4a9SWei Yongjun /* we need to exclude all possible ENOPROTOOPTs except default case */ 1108cf6fc4a9SWei Yongjun if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { 11093fdadf7dSDmitry Mishin int len; 11103fdadf7dSDmitry Mishin 11113fdadf7dSDmitry Mishin if (get_user(len, optlen)) 11123fdadf7dSDmitry Mishin return -EFAULT; 11133fdadf7dSDmitry Mishin 11143fdadf7dSDmitry Mishin lock_sock(sk); 11153fdadf7dSDmitry Mishin err = nf_getsockopt(sk, PF_INET6, optname, optval, 11163fdadf7dSDmitry Mishin &len); 11173fdadf7dSDmitry Mishin release_sock(sk); 11183fdadf7dSDmitry Mishin if (err >= 0) 11193fdadf7dSDmitry Mishin err = put_user(len, optlen); 11203fdadf7dSDmitry Mishin } 11213fdadf7dSDmitry Mishin #endif 11223fdadf7dSDmitry Mishin return err; 11233fdadf7dSDmitry Mishin } 11243fdadf7dSDmitry Mishin 11257159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_getsockopt); 11267159039aSYOSHIFUJI Hideaki 11273fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 11283fdadf7dSDmitry Mishin int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, 11293fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 11303fdadf7dSDmitry Mishin { 11313fdadf7dSDmitry Mishin int err; 11323fdadf7dSDmitry Mishin 11333fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) { 1134543d9cfeSArnaldo Carvalho de Melo if (udp_prot.compat_getsockopt != NULL) 1135543d9cfeSArnaldo Carvalho de Melo return udp_prot.compat_getsockopt(sk, level, optname, 1136543d9cfeSArnaldo Carvalho de Melo optval, optlen); 1137543d9cfeSArnaldo Carvalho de Melo return udp_prot.getsockopt(sk, level, optname, optval, optlen); 11383fdadf7dSDmitry Mishin } 11393fdadf7dSDmitry Mishin 11403fdadf7dSDmitry Mishin if (level != SOL_IPV6) 11413fdadf7dSDmitry Mishin return -ENOPROTOOPT; 11423fdadf7dSDmitry Mishin 114380991790SPavel Emelyanov if (optname == MCAST_MSFILTER) 114480991790SPavel Emelyanov return compat_mc_getsockopt(sk, level, optname, optval, optlen, 114580991790SPavel Emelyanov ipv6_getsockopt); 114680991790SPavel Emelyanov 11473fdadf7dSDmitry Mishin err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); 11483fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 1149cf6fc4a9SWei Yongjun /* we need to exclude all possible ENOPROTOOPTs except default case */ 1150cf6fc4a9SWei Yongjun if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { 11513fdadf7dSDmitry Mishin int len; 11523fdadf7dSDmitry Mishin 11533fdadf7dSDmitry Mishin if (get_user(len, optlen)) 11543fdadf7dSDmitry Mishin return -EFAULT; 11553fdadf7dSDmitry Mishin 11563fdadf7dSDmitry Mishin lock_sock(sk); 1157543d9cfeSArnaldo Carvalho de Melo err = compat_nf_getsockopt(sk, PF_INET6, 1158543d9cfeSArnaldo Carvalho de Melo optname, optval, &len); 11593fdadf7dSDmitry Mishin release_sock(sk); 11603fdadf7dSDmitry Mishin if (err >= 0) 11613fdadf7dSDmitry Mishin err = put_user(len, optlen); 11623fdadf7dSDmitry Mishin } 11633fdadf7dSDmitry Mishin #endif 11643fdadf7dSDmitry Mishin return err; 11653fdadf7dSDmitry Mishin } 1166543d9cfeSArnaldo Carvalho de Melo 1167543d9cfeSArnaldo Carvalho de Melo EXPORT_SYMBOL(compat_ipv6_getsockopt); 11683fdadf7dSDmitry Mishin #endif 11693fdadf7dSDmitry Mishin 1170