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> 55a149e7c7SDavid Lebrun #include <net/seg6.h> 561da177e4SLinus Torvalds 577c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds struct ip6_ra_chain *ip6_ra_chain; 601da177e4SLinus Torvalds DEFINE_RWLOCK(ip6_ra_lock); 611da177e4SLinus Torvalds 62725a8ff0SDenis V. Lunev int ip6_ra_control(struct sock *sk, int sel) 631da177e4SLinus Torvalds { 641da177e4SLinus Torvalds struct ip6_ra_chain *ra, *new_ra, **rap; 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds /* RA packet may be delivered ONLY to IPPROTO_RAW socket */ 67c720c7e8SEric Dumazet if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num != IPPROTO_RAW) 681717699cSYOSHIFUJI Hideaki return -ENOPROTOOPT; 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds new_ra = (sel >= 0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds write_lock_bh(&ip6_ra_lock); 731da177e4SLinus Torvalds for (rap = &ip6_ra_chain; (ra = *rap) != NULL; rap = &ra->next) { 741da177e4SLinus Torvalds if (ra->sk == sk) { 751da177e4SLinus Torvalds if (sel >= 0) { 761da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 771da177e4SLinus Torvalds kfree(new_ra); 781da177e4SLinus Torvalds return -EADDRINUSE; 791da177e4SLinus Torvalds } 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds *rap = ra->next; 821da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds sock_put(sk); 851da177e4SLinus Torvalds kfree(ra); 861da177e4SLinus Torvalds return 0; 871da177e4SLinus Torvalds } 881da177e4SLinus Torvalds } 8963159f29SIan Morris if (!new_ra) { 901da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 911da177e4SLinus Torvalds return -ENOBUFS; 921da177e4SLinus Torvalds } 931da177e4SLinus Torvalds new_ra->sk = sk; 941da177e4SLinus Torvalds new_ra->sel = sel; 951da177e4SLinus Torvalds new_ra->next = ra; 961da177e4SLinus Torvalds *rap = new_ra; 971da177e4SLinus Torvalds sock_hold(sk); 981da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 991da177e4SLinus Torvalds return 0; 1001da177e4SLinus Torvalds } 1011da177e4SLinus Torvalds 102e7712f1aSYOSHIFUJI Hideaki struct ipv6_txoptions *ipv6_update_options(struct sock *sk, 103e7712f1aSYOSHIFUJI Hideaki struct ipv6_txoptions *opt) 104e7712f1aSYOSHIFUJI Hideaki { 105e7712f1aSYOSHIFUJI Hideaki if (inet_sk(sk)->is_icsk) { 106e7712f1aSYOSHIFUJI Hideaki if (opt && 107e7712f1aSYOSHIFUJI Hideaki !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) && 108c720c7e8SEric Dumazet inet_sk(sk)->inet_daddr != LOOPBACK4_IPV6) { 109e7712f1aSYOSHIFUJI Hideaki struct inet_connection_sock *icsk = inet_csk(sk); 110e7712f1aSYOSHIFUJI Hideaki icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen; 111e7712f1aSYOSHIFUJI Hideaki icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); 112e7712f1aSYOSHIFUJI Hideaki } 113e7712f1aSYOSHIFUJI Hideaki } 11445f6fad8SEric Dumazet opt = xchg((__force struct ipv6_txoptions **)&inet6_sk(sk)->opt, 11545f6fad8SEric Dumazet opt); 116e7712f1aSYOSHIFUJI Hideaki sk_dst_reset(sk); 117e7712f1aSYOSHIFUJI Hideaki 118e7712f1aSYOSHIFUJI Hideaki return opt; 119e7712f1aSYOSHIFUJI Hideaki } 120e7712f1aSYOSHIFUJI Hideaki 121baf606d9SMarcelo Ricardo Leitner static bool setsockopt_needs_rtnl(int optname) 122baf606d9SMarcelo Ricardo Leitner { 123baf606d9SMarcelo Ricardo Leitner switch (optname) { 1248651be8fSWANG Cong case IPV6_ADDRFORM: 125baf606d9SMarcelo Ricardo Leitner case IPV6_ADD_MEMBERSHIP: 126baf606d9SMarcelo Ricardo Leitner case IPV6_DROP_MEMBERSHIP: 127c4a6853dSMarcelo Ricardo Leitner case IPV6_JOIN_ANYCAST: 128c4a6853dSMarcelo Ricardo Leitner case IPV6_LEAVE_ANYCAST: 129baf606d9SMarcelo Ricardo Leitner case MCAST_JOIN_GROUP: 130baf606d9SMarcelo Ricardo Leitner case MCAST_LEAVE_GROUP: 13154ff9ef3SMarcelo Ricardo Leitner case MCAST_JOIN_SOURCE_GROUP: 13254ff9ef3SMarcelo Ricardo Leitner case MCAST_LEAVE_SOURCE_GROUP: 13354ff9ef3SMarcelo Ricardo Leitner case MCAST_BLOCK_SOURCE: 13454ff9ef3SMarcelo Ricardo Leitner case MCAST_UNBLOCK_SOURCE: 13554ff9ef3SMarcelo Ricardo Leitner case MCAST_MSFILTER: 136baf606d9SMarcelo Ricardo Leitner return true; 137baf606d9SMarcelo Ricardo Leitner } 138baf606d9SMarcelo Ricardo Leitner return false; 139baf606d9SMarcelo Ricardo Leitner } 140baf606d9SMarcelo Ricardo Leitner 1413fdadf7dSDmitry Mishin static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, 142b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 1431da177e4SLinus Torvalds { 1441da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 1453b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(sk); 1461da177e4SLinus Torvalds int val, valbool; 1471da177e4SLinus Torvalds int retv = -ENOPROTOOPT; 148baf606d9SMarcelo Ricardo Leitner bool needs_rtnl = setsockopt_needs_rtnl(optname); 1491da177e4SLinus Torvalds 15063159f29SIan Morris if (!optval) 1511da177e4SLinus Torvalds val = 0; 152b2a9d7c2SYOSHIFUJI Hideaki else { 153b2a9d7c2SYOSHIFUJI Hideaki if (optlen >= sizeof(int)) { 154b2a9d7c2SYOSHIFUJI Hideaki if (get_user(val, (int __user *) optval)) 1551da177e4SLinus Torvalds return -EFAULT; 156b2a9d7c2SYOSHIFUJI Hideaki } else 157b2a9d7c2SYOSHIFUJI Hideaki val = 0; 158b2a9d7c2SYOSHIFUJI Hideaki } 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds valbool = (val != 0); 1611da177e4SLinus Torvalds 1627bc570c8SYOSHIFUJI Hideaki if (ip6_mroute_opt(optname)) 1637bc570c8SYOSHIFUJI Hideaki return ip6_mroute_setsockopt(sk, optname, optval, optlen); 1647bc570c8SYOSHIFUJI Hideaki 165baf606d9SMarcelo Ricardo Leitner if (needs_rtnl) 166baf606d9SMarcelo Ricardo Leitner rtnl_lock(); 1671da177e4SLinus Torvalds lock_sock(sk); 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds switch (optname) { 1701da177e4SLinus Torvalds 1711da177e4SLinus Torvalds case IPV6_ADDRFORM: 172b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 173b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 1741da177e4SLinus Torvalds if (val == PF_INET) { 1751da177e4SLinus Torvalds struct ipv6_txoptions *opt; 1761da177e4SLinus Torvalds struct sk_buff *pktopt; 1771da177e4SLinus Torvalds 17849d074f4SDenis V. Lunev if (sk->sk_type == SOCK_RAW) 17949d074f4SDenis V. Lunev break; 18049d074f4SDenis V. Lunev 1819596cc82SDenis V. Lunev if (sk->sk_protocol == IPPROTO_UDP || 1829596cc82SDenis V. Lunev sk->sk_protocol == IPPROTO_UDPLITE) { 1839596cc82SDenis V. Lunev struct udp_sock *up = udp_sk(sk); 1849596cc82SDenis V. Lunev if (up->pending == AF_INET6) { 1859596cc82SDenis V. Lunev retv = -EBUSY; 1869596cc82SDenis V. Lunev break; 1879596cc82SDenis V. Lunev } 1889596cc82SDenis V. Lunev } else if (sk->sk_protocol != IPPROTO_TCP) 1891da177e4SLinus Torvalds break; 1901da177e4SLinus Torvalds 1911da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) { 1921da177e4SLinus Torvalds retv = -ENOTCONN; 1931da177e4SLinus Torvalds break; 1941da177e4SLinus Torvalds } 1951da177e4SLinus Torvalds 1961da177e4SLinus Torvalds if (ipv6_only_sock(sk) || 197efe4208fSEric Dumazet !ipv6_addr_v4mapped(&sk->sk_v6_daddr)) { 1981da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 1991da177e4SLinus Torvalds break; 2001da177e4SLinus Torvalds } 2011da177e4SLinus Torvalds 2021da177e4SLinus Torvalds fl6_free_socklist(sk); 2038651be8fSWANG Cong __ipv6_sock_mc_close(sk); 2041da177e4SLinus Torvalds 205e6848976SArnaldo Carvalho de Melo /* 206e6848976SArnaldo Carvalho de Melo * Sock is moving from IPv6 to IPv4 (sk_prot), so 207e6848976SArnaldo Carvalho de Melo * remove it from the refcnt debug socks count in the 208e6848976SArnaldo Carvalho de Melo * original family... 209e6848976SArnaldo Carvalho de Melo */ 210e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_dec(sk); 211e6848976SArnaldo Carvalho de Melo 2121da177e4SLinus Torvalds if (sk->sk_protocol == IPPROTO_TCP) { 213d83d8461SArnaldo Carvalho de Melo struct inet_connection_sock *icsk = inet_csk(sk); 2141da177e4SLinus Torvalds local_bh_disable(); 215c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, sk->sk_prot, -1); 216c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, &tcp_prot, 1); 2171da177e4SLinus Torvalds local_bh_enable(); 2181da177e4SLinus Torvalds sk->sk_prot = &tcp_prot; 219d83d8461SArnaldo Carvalho de Melo icsk->icsk_af_ops = &ipv4_specific; 2201da177e4SLinus Torvalds sk->sk_socket->ops = &inet_stream_ops; 2211da177e4SLinus Torvalds sk->sk_family = PF_INET; 222d83d8461SArnaldo Carvalho de Melo tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); 2231da177e4SLinus Torvalds } else { 224ba4e58ecSGerrit Renker struct proto *prot = &udp_prot; 225ba4e58ecSGerrit Renker 226db8dac20SDavid S. Miller if (sk->sk_protocol == IPPROTO_UDPLITE) 227ba4e58ecSGerrit Renker prot = &udplite_prot; 2281da177e4SLinus Torvalds local_bh_disable(); 229c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, sk->sk_prot, -1); 230c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, prot, 1); 2311da177e4SLinus Torvalds local_bh_enable(); 232ba4e58ecSGerrit Renker sk->sk_prot = prot; 2331da177e4SLinus Torvalds sk->sk_socket->ops = &inet_dgram_ops; 2341da177e4SLinus Torvalds sk->sk_family = PF_INET; 2351da177e4SLinus Torvalds } 23645f6fad8SEric Dumazet opt = xchg((__force struct ipv6_txoptions **)&np->opt, 23745f6fad8SEric Dumazet NULL); 23845f6fad8SEric Dumazet if (opt) { 23945f6fad8SEric Dumazet atomic_sub(opt->tot_len, &sk->sk_omem_alloc); 24045f6fad8SEric Dumazet txopt_put(opt); 24145f6fad8SEric Dumazet } 2421da177e4SLinus Torvalds pktopt = xchg(&np->pktoptions, NULL); 2431da177e4SLinus Torvalds kfree_skb(pktopt); 2441da177e4SLinus Torvalds 2451da177e4SLinus Torvalds sk->sk_destruct = inet_sock_destruct; 246e6848976SArnaldo Carvalho de Melo /* 247e6848976SArnaldo Carvalho de Melo * ... and add it to the refcnt debug socks count 248e6848976SArnaldo Carvalho de Melo * in the new family. -acme 249e6848976SArnaldo Carvalho de Melo */ 250e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_inc(sk); 2511da177e4SLinus Torvalds module_put(THIS_MODULE); 2521da177e4SLinus Torvalds retv = 0; 2531da177e4SLinus Torvalds break; 2541da177e4SLinus Torvalds } 2551da177e4SLinus Torvalds goto e_inval; 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds case IPV6_V6ONLY: 258b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int) || 259c720c7e8SEric Dumazet inet_sk(sk)->inet_num) 2601da177e4SLinus Torvalds goto e_inval; 2619fe516baSEric Dumazet sk->sk_ipv6only = valbool; 2621da177e4SLinus Torvalds retv = 0; 2631da177e4SLinus Torvalds break; 2641da177e4SLinus Torvalds 265333fad53SYOSHIFUJI Hideaki case IPV6_RECVPKTINFO: 266b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 267b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2681da177e4SLinus Torvalds np->rxopt.bits.rxinfo = valbool; 2691da177e4SLinus Torvalds retv = 0; 2701da177e4SLinus Torvalds break; 2711da177e4SLinus Torvalds 272333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 273b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 274b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 275333fad53SYOSHIFUJI Hideaki np->rxopt.bits.rxoinfo = valbool; 276333fad53SYOSHIFUJI Hideaki retv = 0; 277333fad53SYOSHIFUJI Hideaki break; 278333fad53SYOSHIFUJI Hideaki 279333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPLIMIT: 280b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 281b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2821da177e4SLinus Torvalds np->rxopt.bits.rxhlim = valbool; 2831da177e4SLinus Torvalds retv = 0; 2841da177e4SLinus Torvalds break; 2851da177e4SLinus Torvalds 286333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 287b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 288b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 289333fad53SYOSHIFUJI Hideaki np->rxopt.bits.rxohlim = valbool; 290333fad53SYOSHIFUJI Hideaki retv = 0; 291333fad53SYOSHIFUJI Hideaki break; 292333fad53SYOSHIFUJI Hideaki 293333fad53SYOSHIFUJI Hideaki case IPV6_RECVRTHDR: 294b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 295b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 2964c752098SYOSHIFUJI Hideaki np->rxopt.bits.srcrt = valbool; 2971da177e4SLinus Torvalds retv = 0; 2981da177e4SLinus Torvalds break; 2991da177e4SLinus Torvalds 300333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 301b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 302b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 3034c752098SYOSHIFUJI Hideaki np->rxopt.bits.osrcrt = valbool; 304333fad53SYOSHIFUJI Hideaki retv = 0; 305333fad53SYOSHIFUJI Hideaki break; 306333fad53SYOSHIFUJI Hideaki 307333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPOPTS: 308b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 309b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 3101da177e4SLinus Torvalds np->rxopt.bits.hopopts = valbool; 3111da177e4SLinus Torvalds retv = 0; 3121da177e4SLinus Torvalds break; 3131da177e4SLinus Torvalds 314333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 315b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 316b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 317333fad53SYOSHIFUJI Hideaki np->rxopt.bits.ohopopts = valbool; 318333fad53SYOSHIFUJI Hideaki retv = 0; 319333fad53SYOSHIFUJI Hideaki break; 320333fad53SYOSHIFUJI Hideaki 321333fad53SYOSHIFUJI Hideaki case IPV6_RECVDSTOPTS: 322b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 323b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 3241da177e4SLinus Torvalds np->rxopt.bits.dstopts = valbool; 3251da177e4SLinus Torvalds retv = 0; 3261da177e4SLinus Torvalds break; 3271da177e4SLinus Torvalds 328333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 329b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 330b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 331333fad53SYOSHIFUJI Hideaki np->rxopt.bits.odstopts = valbool; 332333fad53SYOSHIFUJI Hideaki retv = 0; 333333fad53SYOSHIFUJI Hideaki break; 334333fad53SYOSHIFUJI Hideaki 33541a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 336b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 337b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 338d0ee011fSRemi Denis-Courmont if (val < -1 || val > 0xff) 33941a1f8eaSYOSHIFUJI Hideaki goto e_inval; 34026ced1e4SGerrit Renker /* RFC 3542, 6.5: default traffic class of 0x0 */ 34126ced1e4SGerrit Renker if (val == -1) 34226ced1e4SGerrit Renker val = 0; 34341a1f8eaSYOSHIFUJI Hideaki np->tclass = val; 34441a1f8eaSYOSHIFUJI Hideaki retv = 0; 34541a1f8eaSYOSHIFUJI Hideaki break; 34641a1f8eaSYOSHIFUJI Hideaki 34741a1f8eaSYOSHIFUJI Hideaki case IPV6_RECVTCLASS: 348b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 349b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 35041a1f8eaSYOSHIFUJI Hideaki np->rxopt.bits.rxtclass = valbool; 35141a1f8eaSYOSHIFUJI Hideaki retv = 0; 35241a1f8eaSYOSHIFUJI Hideaki break; 35341a1f8eaSYOSHIFUJI Hideaki 3541da177e4SLinus Torvalds case IPV6_FLOWINFO: 355b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 356b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 3571da177e4SLinus Torvalds np->rxopt.bits.rxflow = valbool; 3581da177e4SLinus Torvalds retv = 0; 3591da177e4SLinus Torvalds break; 3601da177e4SLinus Torvalds 361793b1473SBrian Haley case IPV6_RECVPATHMTU: 362793b1473SBrian Haley if (optlen < sizeof(int)) 363793b1473SBrian Haley goto e_inval; 364793b1473SBrian Haley np->rxopt.bits.rxpmtu = valbool; 365793b1473SBrian Haley retv = 0; 366793b1473SBrian Haley break; 367793b1473SBrian Haley 3686c468622SBalazs Scheidler case IPV6_TRANSPARENT: 369af31f412SEric W. Biederman if (valbool && !ns_capable(net->user_ns, CAP_NET_ADMIN) && 370af31f412SEric W. Biederman !ns_capable(net->user_ns, CAP_NET_RAW)) { 371b889416bSBalazs Scheidler retv = -EPERM; 372b889416bSBalazs Scheidler break; 373b889416bSBalazs Scheidler } 3746c468622SBalazs Scheidler if (optlen < sizeof(int)) 3756c468622SBalazs Scheidler goto e_inval; 3766c468622SBalazs Scheidler /* we don't have a separate transparent bit for IPV6 we use the one in the IPv4 socket */ 3776c468622SBalazs Scheidler inet_sk(sk)->transparent = valbool; 3786c468622SBalazs Scheidler retv = 0; 3796c468622SBalazs Scheidler break; 3806c468622SBalazs Scheidler 3816c468622SBalazs Scheidler case IPV6_RECVORIGDSTADDR: 3826c468622SBalazs Scheidler if (optlen < sizeof(int)) 3836c468622SBalazs Scheidler goto e_inval; 3846c468622SBalazs Scheidler np->rxopt.bits.rxorigdstaddr = valbool; 3856c468622SBalazs Scheidler retv = 0; 3866c468622SBalazs Scheidler break; 3876c468622SBalazs Scheidler 388333fad53SYOSHIFUJI Hideaki case IPV6_HOPOPTS: 389333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 390333fad53SYOSHIFUJI Hideaki case IPV6_RTHDR: 391333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 392333fad53SYOSHIFUJI Hideaki { 393333fad53SYOSHIFUJI Hideaki struct ipv6_txoptions *opt; 394aea7427fSShan Wei 395aea7427fSShan Wei /* remove any sticky options header with a zero option 396aea7427fSShan Wei * length, per RFC3542. 397aea7427fSShan Wei */ 398333fad53SYOSHIFUJI Hideaki if (optlen == 0) 399cb422c46SLuiz Capitulino optval = NULL; 40063159f29SIan Morris else if (!optval) 401cfb266c0SYang Hongyang goto e_inval; 402aea7427fSShan Wei else if (optlen < sizeof(struct ipv6_opt_hdr) || 403aea7427fSShan Wei optlen & 0x7 || optlen > 8 * 255) 404aea7427fSShan Wei goto e_inval; 405333fad53SYOSHIFUJI Hideaki 406333fad53SYOSHIFUJI Hideaki /* hop-by-hop / destination options are privileged option */ 407333fad53SYOSHIFUJI Hideaki retv = -EPERM; 408af31f412SEric W. Biederman if (optname != IPV6_RTHDR && !ns_capable(net->user_ns, CAP_NET_RAW)) 409333fad53SYOSHIFUJI Hideaki break; 410333fad53SYOSHIFUJI Hideaki 4111e1d04e6SHannes Frederic Sowa opt = rcu_dereference_protected(np->opt, 4121e1d04e6SHannes Frederic Sowa lockdep_sock_is_held(sk)); 41345f6fad8SEric Dumazet opt = ipv6_renew_options(sk, opt, optname, 414333fad53SYOSHIFUJI Hideaki (struct ipv6_opt_hdr __user *)optval, 415333fad53SYOSHIFUJI Hideaki optlen); 416333fad53SYOSHIFUJI Hideaki if (IS_ERR(opt)) { 417333fad53SYOSHIFUJI Hideaki retv = PTR_ERR(opt); 418333fad53SYOSHIFUJI Hideaki break; 419333fad53SYOSHIFUJI Hideaki } 420333fad53SYOSHIFUJI Hideaki 421333fad53SYOSHIFUJI Hideaki /* routing header option needs extra check */ 4226e093d9dSBrian Haley retv = -EINVAL; 423dfee0a72SOlaf Kirch if (optname == IPV6_RTHDR && opt && opt->srcrt) { 424333fad53SYOSHIFUJI Hideaki struct ipv6_rt_hdr *rthdr = opt->srcrt; 425280a9d34SMasahide NAKAMURA switch (rthdr->type) { 42607a93626SAmerigo Wang #if IS_ENABLED(CONFIG_IPV6_MIP6) 427280a9d34SMasahide NAKAMURA case IPV6_SRCRT_TYPE_2: 4286e093d9dSBrian Haley if (rthdr->hdrlen != 2 || 4296e093d9dSBrian Haley rthdr->segments_left != 1) 4306e093d9dSBrian Haley goto sticky_done; 4316e093d9dSBrian Haley 432280a9d34SMasahide NAKAMURA break; 433bb4dbf9eSYOSHIFUJI Hideaki #endif 434a149e7c7SDavid Lebrun case IPV6_SRCRT_TYPE_4: 435a149e7c7SDavid Lebrun { 436a149e7c7SDavid Lebrun struct ipv6_sr_hdr *srh = (struct ipv6_sr_hdr *) 437a149e7c7SDavid Lebrun opt->srcrt; 438a149e7c7SDavid Lebrun 439a149e7c7SDavid Lebrun if (!seg6_validate_srh(srh, optlen)) 440a149e7c7SDavid Lebrun goto sticky_done; 441a149e7c7SDavid Lebrun break; 442a149e7c7SDavid Lebrun } 443280a9d34SMasahide NAKAMURA default: 444333fad53SYOSHIFUJI Hideaki goto sticky_done; 445280a9d34SMasahide NAKAMURA } 446333fad53SYOSHIFUJI Hideaki } 447333fad53SYOSHIFUJI Hideaki 448333fad53SYOSHIFUJI Hideaki retv = 0; 449e7712f1aSYOSHIFUJI Hideaki opt = ipv6_update_options(sk, opt); 450333fad53SYOSHIFUJI Hideaki sticky_done: 45145f6fad8SEric Dumazet if (opt) { 45245f6fad8SEric Dumazet atomic_sub(opt->tot_len, &sk->sk_omem_alloc); 45345f6fad8SEric Dumazet txopt_put(opt); 45445f6fad8SEric Dumazet } 455333fad53SYOSHIFUJI Hideaki break; 456333fad53SYOSHIFUJI Hideaki } 457333fad53SYOSHIFUJI Hideaki 458b24a2516SYang Hongyang case IPV6_PKTINFO: 459b24a2516SYang Hongyang { 460b24a2516SYang Hongyang struct in6_pktinfo pkt; 461b24a2516SYang Hongyang 462b24a2516SYang Hongyang if (optlen == 0) 463b24a2516SYang Hongyang goto e_inval; 46463159f29SIan Morris else if (optlen < sizeof(struct in6_pktinfo) || !optval) 465b24a2516SYang Hongyang goto e_inval; 466b24a2516SYang Hongyang 467914d1164SIlpo Järvinen if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) { 468b24a2516SYang Hongyang retv = -EFAULT; 469b24a2516SYang Hongyang break; 470b24a2516SYang Hongyang } 471b24a2516SYang Hongyang if (sk->sk_bound_dev_if && pkt.ipi6_ifindex != sk->sk_bound_dev_if) 472b24a2516SYang Hongyang goto e_inval; 473b24a2516SYang Hongyang 474b24a2516SYang Hongyang np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex; 4754e3fd7a0SAlexey Dobriyan np->sticky_pktinfo.ipi6_addr = pkt.ipi6_addr; 476b24a2516SYang Hongyang retv = 0; 477b24a2516SYang Hongyang break; 478b24a2516SYang Hongyang } 479b24a2516SYang Hongyang 480333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTOPTIONS: 4811da177e4SLinus Torvalds { 4821da177e4SLinus Torvalds struct ipv6_txoptions *opt = NULL; 4831da177e4SLinus Torvalds struct msghdr msg; 4844c9483b2SDavid S. Miller struct flowi6 fl6; 485ad1e46a8SSoheil Hassas Yeganeh struct sockcm_cookie sockc_junk; 48626879da5SWei Wang struct ipcm6_cookie ipc6; 4871da177e4SLinus Torvalds 4884c9483b2SDavid S. Miller memset(&fl6, 0, sizeof(fl6)); 4894c9483b2SDavid S. Miller fl6.flowi6_oif = sk->sk_bound_dev_if; 4904c9483b2SDavid S. Miller fl6.flowi6_mark = sk->sk_mark; 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvalds if (optlen == 0) 4931da177e4SLinus Torvalds goto update; 4941da177e4SLinus Torvalds 4951da177e4SLinus Torvalds /* 1K is probably excessive 4961da177e4SLinus Torvalds * 1K is surely not enough, 2K per standard header is 16K. 4971da177e4SLinus Torvalds */ 4981da177e4SLinus Torvalds retv = -EINVAL; 4991da177e4SLinus Torvalds if (optlen > 64*1024) 5001da177e4SLinus Torvalds break; 5011da177e4SLinus Torvalds 5021da177e4SLinus Torvalds opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); 5031da177e4SLinus Torvalds retv = -ENOBUFS; 50463159f29SIan Morris if (!opt) 5051da177e4SLinus Torvalds break; 5061da177e4SLinus Torvalds 5071da177e4SLinus Torvalds memset(opt, 0, sizeof(*opt)); 50845f6fad8SEric Dumazet atomic_set(&opt->refcnt, 1); 5091da177e4SLinus Torvalds opt->tot_len = sizeof(*opt) + optlen; 5101da177e4SLinus Torvalds retv = -EFAULT; 5111da177e4SLinus Torvalds if (copy_from_user(opt+1, optval, optlen)) 5121da177e4SLinus Torvalds goto done; 5131da177e4SLinus Torvalds 5141da177e4SLinus Torvalds msg.msg_controllen = optlen; 5151da177e4SLinus Torvalds msg.msg_control = (void *)(opt+1); 51626879da5SWei Wang ipc6.opt = opt; 5171da177e4SLinus Torvalds 51826879da5SWei Wang retv = ip6_datagram_send_ctl(net, sk, &msg, &fl6, &ipc6, &sockc_junk); 5191da177e4SLinus Torvalds if (retv) 5201da177e4SLinus Torvalds goto done; 5211da177e4SLinus Torvalds update: 5221da177e4SLinus Torvalds retv = 0; 523e7712f1aSYOSHIFUJI Hideaki opt = ipv6_update_options(sk, opt); 5241da177e4SLinus Torvalds done: 52545f6fad8SEric Dumazet if (opt) { 52645f6fad8SEric Dumazet atomic_sub(opt->tot_len, &sk->sk_omem_alloc); 52745f6fad8SEric Dumazet txopt_put(opt); 52845f6fad8SEric Dumazet } 5291da177e4SLinus Torvalds break; 5301da177e4SLinus Torvalds } 5311da177e4SLinus Torvalds case IPV6_UNICAST_HOPS: 532b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 533b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 5341da177e4SLinus Torvalds if (val > 255 || val < -1) 5351da177e4SLinus Torvalds goto e_inval; 5361da177e4SLinus Torvalds np->hop_limit = val; 5371da177e4SLinus Torvalds retv = 0; 5381da177e4SLinus Torvalds break; 5391da177e4SLinus Torvalds 5401da177e4SLinus Torvalds case IPV6_MULTICAST_HOPS: 5411da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM) 5421717699cSYOSHIFUJI Hideaki break; 543b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 544b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 5451da177e4SLinus Torvalds if (val > 255 || val < -1) 5461da177e4SLinus Torvalds goto e_inval; 5472a38e6d5SLi Wei np->mcast_hops = (val == -1 ? IPV6_DEFAULT_MCASTHOPS : val); 5481da177e4SLinus Torvalds retv = 0; 5491da177e4SLinus Torvalds break; 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds case IPV6_MULTICAST_LOOP: 552b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 553b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 55428d44882SYOSHIFUJI Hideaki if (val != valbool) 55528d44882SYOSHIFUJI Hideaki goto e_inval; 5561da177e4SLinus Torvalds np->mc_loop = valbool; 5571da177e4SLinus Torvalds retv = 0; 5581da177e4SLinus Torvalds break; 5591da177e4SLinus Torvalds 560c4062dfcSErich E. Hoover case IPV6_UNICAST_IF: 561c4062dfcSErich E. Hoover { 562c4062dfcSErich E. Hoover struct net_device *dev = NULL; 563c4062dfcSErich E. Hoover int ifindex; 564c4062dfcSErich E. Hoover 565c4062dfcSErich E. Hoover if (optlen != sizeof(int)) 566c4062dfcSErich E. Hoover goto e_inval; 567c4062dfcSErich E. Hoover 568c4062dfcSErich E. Hoover ifindex = (__force int)ntohl((__force __be32)val); 569c4062dfcSErich E. Hoover if (ifindex == 0) { 570c4062dfcSErich E. Hoover np->ucast_oif = 0; 571c4062dfcSErich E. Hoover retv = 0; 572c4062dfcSErich E. Hoover break; 573c4062dfcSErich E. Hoover } 574c4062dfcSErich E. Hoover 575c4062dfcSErich E. Hoover dev = dev_get_by_index(net, ifindex); 576c4062dfcSErich E. Hoover retv = -EADDRNOTAVAIL; 577c4062dfcSErich E. Hoover if (!dev) 578c4062dfcSErich E. Hoover break; 579c4062dfcSErich E. Hoover dev_put(dev); 580c4062dfcSErich E. Hoover 581c4062dfcSErich E. Hoover retv = -EINVAL; 582c4062dfcSErich E. Hoover if (sk->sk_bound_dev_if) 583c4062dfcSErich E. Hoover break; 584c4062dfcSErich E. Hoover 585c4062dfcSErich E. Hoover np->ucast_oif = ifindex; 586c4062dfcSErich E. Hoover retv = 0; 587c4062dfcSErich E. Hoover break; 588c4062dfcSErich E. Hoover } 589c4062dfcSErich E. Hoover 5901da177e4SLinus Torvalds case IPV6_MULTICAST_IF: 5911da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM) 5921717699cSYOSHIFUJI Hideaki break; 593b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 594b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 5954953f0fcSBrian Haley 5964953f0fcSBrian Haley if (val) { 59755b80503SEric Dumazet struct net_device *dev; 59855b80503SEric Dumazet 5991da177e4SLinus Torvalds if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) 6001da177e4SLinus Torvalds goto e_inval; 6011da177e4SLinus Torvalds 60255b80503SEric Dumazet dev = dev_get_by_index(net, val); 60355b80503SEric Dumazet if (!dev) { 6041da177e4SLinus Torvalds retv = -ENODEV; 6051da177e4SLinus Torvalds break; 6061da177e4SLinus Torvalds } 60755b80503SEric Dumazet dev_put(dev); 6084953f0fcSBrian Haley } 6091da177e4SLinus Torvalds np->mcast_oif = val; 6101da177e4SLinus Torvalds retv = 0; 6111da177e4SLinus Torvalds break; 6121da177e4SLinus Torvalds case IPV6_ADD_MEMBERSHIP: 6131da177e4SLinus Torvalds case IPV6_DROP_MEMBERSHIP: 6141da177e4SLinus Torvalds { 6151da177e4SLinus Torvalds struct ipv6_mreq mreq; 6161da177e4SLinus Torvalds 617a28398baSWang Chen if (optlen < sizeof(struct ipv6_mreq)) 618a28398baSWang Chen goto e_inval; 619a28398baSWang Chen 620a96fb49bSFlavio Leitner retv = -EPROTO; 621a96fb49bSFlavio Leitner if (inet_sk(sk)->is_icsk) 622a96fb49bSFlavio Leitner break; 623a96fb49bSFlavio Leitner 6241da177e4SLinus Torvalds retv = -EFAULT; 6251da177e4SLinus Torvalds if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) 6261da177e4SLinus Torvalds break; 6271da177e4SLinus Torvalds 6281da177e4SLinus Torvalds if (optname == IPV6_ADD_MEMBERSHIP) 62954ff9ef3SMarcelo Ricardo Leitner retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); 6301da177e4SLinus Torvalds else 63154ff9ef3SMarcelo Ricardo Leitner retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); 6321da177e4SLinus Torvalds break; 6331da177e4SLinus Torvalds } 6341da177e4SLinus Torvalds case IPV6_JOIN_ANYCAST: 6351da177e4SLinus Torvalds case IPV6_LEAVE_ANYCAST: 6361da177e4SLinus Torvalds { 6371da177e4SLinus Torvalds struct ipv6_mreq mreq; 6381da177e4SLinus Torvalds 639a28398baSWang Chen if (optlen < sizeof(struct ipv6_mreq)) 6401da177e4SLinus Torvalds goto e_inval; 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds retv = -EFAULT; 6431da177e4SLinus Torvalds if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) 6441da177e4SLinus Torvalds break; 6451da177e4SLinus Torvalds 6461da177e4SLinus Torvalds if (optname == IPV6_JOIN_ANYCAST) 6471da177e4SLinus Torvalds retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); 6481da177e4SLinus Torvalds else 6491da177e4SLinus Torvalds retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); 6501da177e4SLinus Torvalds break; 6511da177e4SLinus Torvalds } 6521da177e4SLinus Torvalds case MCAST_JOIN_GROUP: 6531da177e4SLinus Torvalds case MCAST_LEAVE_GROUP: 6541da177e4SLinus Torvalds { 6551da177e4SLinus Torvalds struct group_req greq; 6561da177e4SLinus Torvalds struct sockaddr_in6 *psin6; 6571da177e4SLinus Torvalds 658a28398baSWang Chen if (optlen < sizeof(struct group_req)) 659a28398baSWang Chen goto e_inval; 660a28398baSWang Chen 6611da177e4SLinus Torvalds retv = -EFAULT; 6621da177e4SLinus Torvalds if (copy_from_user(&greq, optval, sizeof(struct group_req))) 6631da177e4SLinus Torvalds break; 6641da177e4SLinus Torvalds if (greq.gr_group.ss_family != AF_INET6) { 6651da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 6661da177e4SLinus Torvalds break; 6671da177e4SLinus Torvalds } 6681da177e4SLinus Torvalds psin6 = (struct sockaddr_in6 *)&greq.gr_group; 6691da177e4SLinus Torvalds if (optname == MCAST_JOIN_GROUP) 67054ff9ef3SMarcelo Ricardo Leitner retv = ipv6_sock_mc_join(sk, greq.gr_interface, 6711da177e4SLinus Torvalds &psin6->sin6_addr); 6721da177e4SLinus Torvalds else 67354ff9ef3SMarcelo Ricardo Leitner retv = ipv6_sock_mc_drop(sk, greq.gr_interface, 6741da177e4SLinus Torvalds &psin6->sin6_addr); 6751da177e4SLinus Torvalds break; 6761da177e4SLinus Torvalds } 6771da177e4SLinus Torvalds case MCAST_JOIN_SOURCE_GROUP: 6781da177e4SLinus Torvalds case MCAST_LEAVE_SOURCE_GROUP: 6791da177e4SLinus Torvalds case MCAST_BLOCK_SOURCE: 6801da177e4SLinus Torvalds case MCAST_UNBLOCK_SOURCE: 6811da177e4SLinus Torvalds { 6821da177e4SLinus Torvalds struct group_source_req greqs; 6831da177e4SLinus Torvalds int omode, add; 6841da177e4SLinus Torvalds 685a28398baSWang Chen if (optlen < sizeof(struct group_source_req)) 6861da177e4SLinus Torvalds goto e_inval; 6871da177e4SLinus Torvalds if (copy_from_user(&greqs, optval, sizeof(greqs))) { 6881da177e4SLinus Torvalds retv = -EFAULT; 6891da177e4SLinus Torvalds break; 6901da177e4SLinus Torvalds } 6911da177e4SLinus Torvalds if (greqs.gsr_group.ss_family != AF_INET6 || 6921da177e4SLinus Torvalds greqs.gsr_source.ss_family != AF_INET6) { 6931da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 6941da177e4SLinus Torvalds break; 6951da177e4SLinus Torvalds } 6961da177e4SLinus Torvalds if (optname == MCAST_BLOCK_SOURCE) { 6971da177e4SLinus Torvalds omode = MCAST_EXCLUDE; 6981da177e4SLinus Torvalds add = 1; 6991da177e4SLinus Torvalds } else if (optname == MCAST_UNBLOCK_SOURCE) { 7001da177e4SLinus Torvalds omode = MCAST_EXCLUDE; 7011da177e4SLinus Torvalds add = 0; 7021da177e4SLinus Torvalds } else if (optname == MCAST_JOIN_SOURCE_GROUP) { 7031da177e4SLinus Torvalds struct sockaddr_in6 *psin6; 7041da177e4SLinus Torvalds 7051da177e4SLinus Torvalds psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; 70654ff9ef3SMarcelo Ricardo Leitner retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, 7071da177e4SLinus Torvalds &psin6->sin6_addr); 708c9e3e8b6SDavid L Stevens /* prior join w/ different source is ok */ 709c9e3e8b6SDavid L Stevens if (retv && retv != -EADDRINUSE) 7101da177e4SLinus Torvalds break; 7111da177e4SLinus Torvalds omode = MCAST_INCLUDE; 7121da177e4SLinus Torvalds add = 1; 713c9e3e8b6SDavid L Stevens } else /* MCAST_LEAVE_SOURCE_GROUP */ { 7141da177e4SLinus Torvalds omode = MCAST_INCLUDE; 7151da177e4SLinus Torvalds add = 0; 7161da177e4SLinus Torvalds } 7171da177e4SLinus Torvalds retv = ip6_mc_source(add, omode, sk, &greqs); 7181da177e4SLinus Torvalds break; 7191da177e4SLinus Torvalds } 7201da177e4SLinus Torvalds case MCAST_MSFILTER: 7211da177e4SLinus Torvalds { 7221da177e4SLinus Torvalds struct group_filter *gsf; 7231da177e4SLinus Torvalds 7241da177e4SLinus Torvalds if (optlen < GROUP_FILTER_SIZE(0)) 7251da177e4SLinus Torvalds goto e_inval; 7261da177e4SLinus Torvalds if (optlen > sysctl_optmem_max) { 7271da177e4SLinus Torvalds retv = -ENOBUFS; 7281da177e4SLinus Torvalds break; 7291da177e4SLinus Torvalds } 7308b3a7005SKris Katterjohn gsf = kmalloc(optlen, GFP_KERNEL); 731cfcabdccSStephen Hemminger if (!gsf) { 7321da177e4SLinus Torvalds retv = -ENOBUFS; 7331da177e4SLinus Torvalds break; 7341da177e4SLinus Torvalds } 7351da177e4SLinus Torvalds retv = -EFAULT; 7361da177e4SLinus Torvalds if (copy_from_user(gsf, optval, optlen)) { 7371da177e4SLinus Torvalds kfree(gsf); 7381da177e4SLinus Torvalds break; 7391da177e4SLinus Torvalds } 7401da177e4SLinus Torvalds /* numsrc >= (4G-140)/128 overflow in 32 bits */ 7411da177e4SLinus Torvalds if (gsf->gf_numsrc >= 0x1ffffffU || 7421da177e4SLinus Torvalds gsf->gf_numsrc > sysctl_mld_max_msf) { 7431da177e4SLinus Torvalds kfree(gsf); 7441da177e4SLinus Torvalds retv = -ENOBUFS; 7451da177e4SLinus Torvalds break; 7461da177e4SLinus Torvalds } 7471da177e4SLinus Torvalds if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { 7481da177e4SLinus Torvalds kfree(gsf); 7491da177e4SLinus Torvalds retv = -EINVAL; 7501da177e4SLinus Torvalds break; 7511da177e4SLinus Torvalds } 7521da177e4SLinus Torvalds retv = ip6_mc_msfilter(sk, gsf); 7531da177e4SLinus Torvalds kfree(gsf); 7541da177e4SLinus Torvalds 7551da177e4SLinus Torvalds break; 7561da177e4SLinus Torvalds } 7571da177e4SLinus Torvalds case IPV6_ROUTER_ALERT: 758b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 759b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 760725a8ff0SDenis V. Lunev retv = ip6_ra_control(sk, val); 7611da177e4SLinus Torvalds break; 7621da177e4SLinus Torvalds case IPV6_MTU_DISCOVER: 763b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 764b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 7650b95227aSHannes Frederic Sowa if (val < IPV6_PMTUDISC_DONT || val > IPV6_PMTUDISC_OMIT) 7661da177e4SLinus Torvalds goto e_inval; 7671da177e4SLinus Torvalds np->pmtudisc = val; 7681da177e4SLinus Torvalds retv = 0; 7691da177e4SLinus Torvalds break; 7701da177e4SLinus Torvalds case IPV6_MTU: 771b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 772b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 7731da177e4SLinus Torvalds if (val && val < IPV6_MIN_MTU) 7741da177e4SLinus Torvalds goto e_inval; 7751da177e4SLinus Torvalds np->frag_size = val; 7761da177e4SLinus Torvalds retv = 0; 7771da177e4SLinus Torvalds break; 7781da177e4SLinus Torvalds case IPV6_RECVERR: 779b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 780b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 7811da177e4SLinus Torvalds np->recverr = valbool; 7821da177e4SLinus Torvalds if (!val) 7831da177e4SLinus Torvalds skb_queue_purge(&sk->sk_error_queue); 7841da177e4SLinus Torvalds retv = 0; 7851da177e4SLinus Torvalds break; 7861da177e4SLinus Torvalds case IPV6_FLOWINFO_SEND: 787b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 788b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 7891da177e4SLinus Torvalds np->sndflow = valbool; 7901da177e4SLinus Torvalds retv = 0; 7911da177e4SLinus Torvalds break; 7921da177e4SLinus Torvalds case IPV6_FLOWLABEL_MGR: 7931da177e4SLinus Torvalds retv = ipv6_flowlabel_opt(sk, optval, optlen); 7941da177e4SLinus Torvalds break; 7951da177e4SLinus Torvalds case IPV6_IPSEC_POLICY: 7961da177e4SLinus Torvalds case IPV6_XFRM_POLICY: 7976fc0b4a7SHerbert Xu retv = -EPERM; 798af31f412SEric W. Biederman if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 7996fc0b4a7SHerbert Xu break; 8001da177e4SLinus Torvalds retv = xfrm_user_policy(sk, optname, optval, optlen); 8011da177e4SLinus Torvalds break; 8021da177e4SLinus Torvalds 8037cbca67cSYOSHIFUJI Hideaki case IPV6_ADDR_PREFERENCES: 8047cbca67cSYOSHIFUJI Hideaki { 8057cbca67cSYOSHIFUJI Hideaki unsigned int pref = 0; 8067cbca67cSYOSHIFUJI Hideaki unsigned int prefmask = ~0; 8077cbca67cSYOSHIFUJI Hideaki 808b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 809b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 810b2a9d7c2SYOSHIFUJI Hideaki 8117cbca67cSYOSHIFUJI Hideaki retv = -EINVAL; 8127cbca67cSYOSHIFUJI Hideaki 8137cbca67cSYOSHIFUJI Hideaki /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ 8147cbca67cSYOSHIFUJI Hideaki switch (val & (IPV6_PREFER_SRC_PUBLIC| 8157cbca67cSYOSHIFUJI Hideaki IPV6_PREFER_SRC_TMP| 8167cbca67cSYOSHIFUJI Hideaki IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { 8177cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_PUBLIC: 8187cbca67cSYOSHIFUJI Hideaki pref |= IPV6_PREFER_SRC_PUBLIC; 8197cbca67cSYOSHIFUJI Hideaki break; 8207cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_TMP: 8217cbca67cSYOSHIFUJI Hideaki pref |= IPV6_PREFER_SRC_TMP; 8227cbca67cSYOSHIFUJI Hideaki break; 8237cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_PUBTMP_DEFAULT: 8247cbca67cSYOSHIFUJI Hideaki break; 8257cbca67cSYOSHIFUJI Hideaki case 0: 8267cbca67cSYOSHIFUJI Hideaki goto pref_skip_pubtmp; 8277cbca67cSYOSHIFUJI Hideaki default: 8287cbca67cSYOSHIFUJI Hideaki goto e_inval; 8291da177e4SLinus Torvalds } 8307cbca67cSYOSHIFUJI Hideaki 8317cbca67cSYOSHIFUJI Hideaki prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| 8327cbca67cSYOSHIFUJI Hideaki IPV6_PREFER_SRC_TMP); 8337cbca67cSYOSHIFUJI Hideaki pref_skip_pubtmp: 8347cbca67cSYOSHIFUJI Hideaki 8357cbca67cSYOSHIFUJI Hideaki /* check HOME/COA conflicts */ 8367cbca67cSYOSHIFUJI Hideaki switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { 8377cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_HOME: 8387cbca67cSYOSHIFUJI Hideaki break; 8397cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_COA: 8407cbca67cSYOSHIFUJI Hideaki pref |= IPV6_PREFER_SRC_COA; 8417cbca67cSYOSHIFUJI Hideaki case 0: 8427cbca67cSYOSHIFUJI Hideaki goto pref_skip_coa; 8437cbca67cSYOSHIFUJI Hideaki default: 8447cbca67cSYOSHIFUJI Hideaki goto e_inval; 8457cbca67cSYOSHIFUJI Hideaki } 8467cbca67cSYOSHIFUJI Hideaki 8477cbca67cSYOSHIFUJI Hideaki prefmask &= ~IPV6_PREFER_SRC_COA; 8487cbca67cSYOSHIFUJI Hideaki pref_skip_coa: 8497cbca67cSYOSHIFUJI Hideaki 8507cbca67cSYOSHIFUJI Hideaki /* check CGA/NONCGA conflicts */ 8517cbca67cSYOSHIFUJI Hideaki switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { 8527cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_CGA: 8537cbca67cSYOSHIFUJI Hideaki case IPV6_PREFER_SRC_NONCGA: 8547cbca67cSYOSHIFUJI Hideaki case 0: 8557cbca67cSYOSHIFUJI Hideaki break; 8567cbca67cSYOSHIFUJI Hideaki default: 8577cbca67cSYOSHIFUJI Hideaki goto e_inval; 8587cbca67cSYOSHIFUJI Hideaki } 8597cbca67cSYOSHIFUJI Hideaki 8607cbca67cSYOSHIFUJI Hideaki np->srcprefs = (np->srcprefs & prefmask) | pref; 8617cbca67cSYOSHIFUJI Hideaki retv = 0; 8627cbca67cSYOSHIFUJI Hideaki 8637cbca67cSYOSHIFUJI Hideaki break; 8647cbca67cSYOSHIFUJI Hideaki } 865e802af9cSStephen Hemminger case IPV6_MINHOPCOUNT: 866e802af9cSStephen Hemminger if (optlen < sizeof(int)) 867e802af9cSStephen Hemminger goto e_inval; 868e802af9cSStephen Hemminger if (val < 0 || val > 255) 869e802af9cSStephen Hemminger goto e_inval; 870e802af9cSStephen Hemminger np->min_hopcount = val; 871d4596badSHannes Frederic Sowa retv = 0; 872793b1473SBrian Haley break; 873793b1473SBrian Haley case IPV6_DONTFRAG: 874793b1473SBrian Haley np->dontfrag = valbool; 875e802af9cSStephen Hemminger retv = 0; 876e802af9cSStephen Hemminger break; 877cb1ce2efSTom Herbert case IPV6_AUTOFLOWLABEL: 878cb1ce2efSTom Herbert np->autoflowlabel = valbool; 879cb1ce2efSTom Herbert retv = 0; 880cb1ce2efSTom Herbert break; 8810cc0aa61SWillem de Bruijn case IPV6_RECVFRAGSIZE: 8820cc0aa61SWillem de Bruijn np->rxopt.bits.recvfragsize = valbool; 8830cc0aa61SWillem de Bruijn retv = 0; 8840cc0aa61SWillem de Bruijn break; 8857cbca67cSYOSHIFUJI Hideaki } 8867cbca67cSYOSHIFUJI Hideaki 8871da177e4SLinus Torvalds release_sock(sk); 888baf606d9SMarcelo Ricardo Leitner if (needs_rtnl) 889baf606d9SMarcelo Ricardo Leitner rtnl_unlock(); 8901da177e4SLinus Torvalds 8911da177e4SLinus Torvalds return retv; 8921da177e4SLinus Torvalds 8931da177e4SLinus Torvalds e_inval: 8941da177e4SLinus Torvalds release_sock(sk); 895baf606d9SMarcelo Ricardo Leitner if (needs_rtnl) 896baf606d9SMarcelo Ricardo Leitner rtnl_unlock(); 8971da177e4SLinus Torvalds return -EINVAL; 8981da177e4SLinus Torvalds } 8991da177e4SLinus Torvalds 9003fdadf7dSDmitry Mishin int ipv6_setsockopt(struct sock *sk, int level, int optname, 901b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 9023fdadf7dSDmitry Mishin { 9033fdadf7dSDmitry Mishin int err; 9043fdadf7dSDmitry Mishin 9053fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) 9063fdadf7dSDmitry Mishin return udp_prot.setsockopt(sk, level, optname, optval, optlen); 9073fdadf7dSDmitry Mishin 9083fdadf7dSDmitry Mishin if (level != SOL_IPV6) 9093fdadf7dSDmitry Mishin return -ENOPROTOOPT; 9103fdadf7dSDmitry Mishin 9113fdadf7dSDmitry Mishin err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); 9123fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 9133fdadf7dSDmitry Mishin /* we need to exclude all possible ENOPROTOOPTs except default case */ 9143fdadf7dSDmitry Mishin if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && 9153fdadf7dSDmitry Mishin optname != IPV6_XFRM_POLICY) { 9163fdadf7dSDmitry Mishin lock_sock(sk); 9173fdadf7dSDmitry Mishin err = nf_setsockopt(sk, PF_INET6, optname, optval, 9183fdadf7dSDmitry Mishin optlen); 9193fdadf7dSDmitry Mishin release_sock(sk); 9203fdadf7dSDmitry Mishin } 9213fdadf7dSDmitry Mishin #endif 9223fdadf7dSDmitry Mishin return err; 9233fdadf7dSDmitry Mishin } 9247159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_setsockopt); 9253fdadf7dSDmitry Mishin 9263fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 9273fdadf7dSDmitry Mishin int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, 928b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 9293fdadf7dSDmitry Mishin { 9303fdadf7dSDmitry Mishin int err; 9313fdadf7dSDmitry Mishin 9323fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) { 933543d9cfeSArnaldo Carvalho de Melo if (udp_prot.compat_setsockopt != NULL) 934543d9cfeSArnaldo Carvalho de Melo return udp_prot.compat_setsockopt(sk, level, optname, 935543d9cfeSArnaldo Carvalho de Melo optval, optlen); 936543d9cfeSArnaldo Carvalho de Melo return udp_prot.setsockopt(sk, level, optname, optval, optlen); 9373fdadf7dSDmitry Mishin } 9383fdadf7dSDmitry Mishin 9393fdadf7dSDmitry Mishin if (level != SOL_IPV6) 9403fdadf7dSDmitry Mishin return -ENOPROTOOPT; 9413fdadf7dSDmitry Mishin 942dae50295SDavid L Stevens if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) 943dae50295SDavid L Stevens return compat_mc_setsockopt(sk, level, optname, optval, optlen, 944dae50295SDavid L Stevens ipv6_setsockopt); 945dae50295SDavid L Stevens 9463fdadf7dSDmitry Mishin err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); 9473fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 9483fdadf7dSDmitry Mishin /* we need to exclude all possible ENOPROTOOPTs except default case */ 9493fdadf7dSDmitry Mishin if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && 9503fdadf7dSDmitry Mishin optname != IPV6_XFRM_POLICY) { 9513fdadf7dSDmitry Mishin lock_sock(sk); 952543d9cfeSArnaldo Carvalho de Melo err = compat_nf_setsockopt(sk, PF_INET6, optname, 953543d9cfeSArnaldo Carvalho de Melo optval, optlen); 9543fdadf7dSDmitry Mishin release_sock(sk); 9553fdadf7dSDmitry Mishin } 9563fdadf7dSDmitry Mishin #endif 9573fdadf7dSDmitry Mishin return err; 9583fdadf7dSDmitry Mishin } 959543d9cfeSArnaldo Carvalho de Melo EXPORT_SYMBOL(compat_ipv6_setsockopt); 9603fdadf7dSDmitry Mishin #endif 9613fdadf7dSDmitry Mishin 96228693079SDavid S. Miller static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, 9634c6510a7SYOSHIFUJI Hideaki int optname, char __user *optval, int len) 964333fad53SYOSHIFUJI Hideaki { 96528693079SDavid S. Miller struct ipv6_opt_hdr *hdr; 96628693079SDavid S. Miller 9674c6510a7SYOSHIFUJI Hideaki if (!opt) 968333fad53SYOSHIFUJI Hideaki return 0; 9694c6510a7SYOSHIFUJI Hideaki 9704c6510a7SYOSHIFUJI Hideaki switch (optname) { 9714c6510a7SYOSHIFUJI Hideaki case IPV6_HOPOPTS: 97228693079SDavid S. Miller hdr = opt->hopopt; 9734c6510a7SYOSHIFUJI Hideaki break; 9744c6510a7SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 9754c6510a7SYOSHIFUJI Hideaki hdr = opt->dst0opt; 9764c6510a7SYOSHIFUJI Hideaki break; 9774c6510a7SYOSHIFUJI Hideaki case IPV6_RTHDR: 9784c6510a7SYOSHIFUJI Hideaki hdr = (struct ipv6_opt_hdr *)opt->srcrt; 9794c6510a7SYOSHIFUJI Hideaki break; 9804c6510a7SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 9814c6510a7SYOSHIFUJI Hideaki hdr = opt->dst1opt; 9824c6510a7SYOSHIFUJI Hideaki break; 9834c6510a7SYOSHIFUJI Hideaki default: 9844c6510a7SYOSHIFUJI Hideaki return -EINVAL; /* should not happen */ 9854c6510a7SYOSHIFUJI Hideaki } 9864c6510a7SYOSHIFUJI Hideaki 9874c6510a7SYOSHIFUJI Hideaki if (!hdr) 9884c6510a7SYOSHIFUJI Hideaki return 0; 98928693079SDavid S. Miller 990d2b02ed9SChris Wright len = min_t(unsigned int, len, ipv6_optlen(hdr)); 991660adc6eSIlpo Järvinen if (copy_to_user(optval, hdr, len)) 992333fad53SYOSHIFUJI Hideaki return -EFAULT; 99395b496b6SYang Hongyang return len; 994333fad53SYOSHIFUJI Hideaki } 995333fad53SYOSHIFUJI Hideaki 9963fdadf7dSDmitry Mishin static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, 99795c96174SEric Dumazet char __user *optval, int __user *optlen, unsigned int flags) 9981da177e4SLinus Torvalds { 9991da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 10001da177e4SLinus Torvalds int len; 10011da177e4SLinus Torvalds int val; 10021da177e4SLinus Torvalds 10037bc570c8SYOSHIFUJI Hideaki if (ip6_mroute_opt(optname)) 10047bc570c8SYOSHIFUJI Hideaki return ip6_mroute_getsockopt(sk, optname, optval, optlen); 10057bc570c8SYOSHIFUJI Hideaki 10061da177e4SLinus Torvalds if (get_user(len, optlen)) 10071da177e4SLinus Torvalds return -EFAULT; 10081da177e4SLinus Torvalds switch (optname) { 10091da177e4SLinus Torvalds case IPV6_ADDRFORM: 10101da177e4SLinus Torvalds if (sk->sk_protocol != IPPROTO_UDP && 1011ba4e58ecSGerrit Renker sk->sk_protocol != IPPROTO_UDPLITE && 10121da177e4SLinus Torvalds sk->sk_protocol != IPPROTO_TCP) 10131717699cSYOSHIFUJI Hideaki return -ENOPROTOOPT; 10141da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) 10151da177e4SLinus Torvalds return -ENOTCONN; 10161da177e4SLinus Torvalds val = sk->sk_family; 10171da177e4SLinus Torvalds break; 10181da177e4SLinus Torvalds case MCAST_MSFILTER: 10191da177e4SLinus Torvalds { 10201da177e4SLinus Torvalds struct group_filter gsf; 10211da177e4SLinus Torvalds int err; 10221da177e4SLinus Torvalds 10231da177e4SLinus Torvalds if (len < GROUP_FILTER_SIZE(0)) 10241da177e4SLinus Torvalds return -EINVAL; 10251da177e4SLinus Torvalds if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) 10261da177e4SLinus Torvalds return -EFAULT; 102720c61fbdSYOSHIFUJI Hideaki if (gsf.gf_group.ss_family != AF_INET6) 102820c61fbdSYOSHIFUJI Hideaki return -EADDRNOTAVAIL; 10291da177e4SLinus Torvalds lock_sock(sk); 10301da177e4SLinus Torvalds err = ip6_mc_msfget(sk, &gsf, 10311da177e4SLinus Torvalds (struct group_filter __user *)optval, optlen); 10321da177e4SLinus Torvalds release_sock(sk); 10331da177e4SLinus Torvalds return err; 10341da177e4SLinus Torvalds } 10351da177e4SLinus Torvalds 1036333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTOPTIONS: 10371da177e4SLinus Torvalds { 10381da177e4SLinus Torvalds struct msghdr msg; 10391da177e4SLinus Torvalds struct sk_buff *skb; 10401da177e4SLinus Torvalds 10411da177e4SLinus Torvalds if (sk->sk_type != SOCK_STREAM) 10421da177e4SLinus Torvalds return -ENOPROTOOPT; 10431da177e4SLinus Torvalds 10441da177e4SLinus Torvalds msg.msg_control = optval; 10451da177e4SLinus Torvalds msg.msg_controllen = len; 104698e77438SDaniel Baluta msg.msg_flags = flags; 10471da177e4SLinus Torvalds 10481da177e4SLinus Torvalds lock_sock(sk); 10491da177e4SLinus Torvalds skb = np->pktoptions; 10501da177e4SLinus Torvalds if (skb) 10514b261c75SHannes Frederic Sowa ip6_datagram_recv_ctl(sk, &msg, skb); 10521dc7b90fSEric Dumazet release_sock(sk); 10531dc7b90fSEric Dumazet if (!skb) { 10541da177e4SLinus Torvalds if (np->rxopt.bits.rxinfo) { 10551da177e4SLinus Torvalds struct in6_pktinfo src_info; 1056f250dcdaSYang Hongyang src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : 1057f250dcdaSYang Hongyang np->sticky_pktinfo.ipi6_ifindex; 1058efe4208fSEric Dumazet src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : np->sticky_pktinfo.ipi6_addr; 10591da177e4SLinus Torvalds put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); 10601da177e4SLinus Torvalds } 10611da177e4SLinus Torvalds if (np->rxopt.bits.rxhlim) { 10621da177e4SLinus Torvalds int hlim = np->mcast_hops; 10631da177e4SLinus Torvalds put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); 10641da177e4SLinus Torvalds } 10654c507d28SJiri Benc if (np->rxopt.bits.rxtclass) { 1066d76ed22bSLi RongQing int tclass = (int)ip6_tclass(np->rcv_flowinfo); 1067d76ed22bSLi RongQing 10684c507d28SJiri Benc put_cmsg(&msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass); 10694c507d28SJiri Benc } 1070333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxoinfo) { 1071333fad53SYOSHIFUJI Hideaki struct in6_pktinfo src_info; 1072f250dcdaSYang Hongyang src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : 1073f250dcdaSYang Hongyang np->sticky_pktinfo.ipi6_ifindex; 1074efe4208fSEric Dumazet src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : 1075efe4208fSEric Dumazet np->sticky_pktinfo.ipi6_addr; 1076333fad53SYOSHIFUJI Hideaki put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); 1077333fad53SYOSHIFUJI Hideaki } 1078333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxohlim) { 1079333fad53SYOSHIFUJI Hideaki int hlim = np->mcast_hops; 1080333fad53SYOSHIFUJI Hideaki put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); 1081333fad53SYOSHIFUJI Hideaki } 10821397ed35SFlorent Fourcot if (np->rxopt.bits.rxflow) { 108368536053SFlorent Fourcot __be32 flowinfo = np->rcv_flowinfo; 108468536053SFlorent Fourcot 10851397ed35SFlorent Fourcot put_cmsg(&msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo); 10861397ed35SFlorent Fourcot } 10871da177e4SLinus Torvalds } 10881da177e4SLinus Torvalds len -= msg.msg_controllen; 10891da177e4SLinus Torvalds return put_user(len, optlen); 10901da177e4SLinus Torvalds } 10911da177e4SLinus Torvalds case IPV6_MTU: 10921da177e4SLinus Torvalds { 10931da177e4SLinus Torvalds struct dst_entry *dst; 1094b6c6712aSEric Dumazet 10951da177e4SLinus Torvalds val = 0; 1096b6c6712aSEric Dumazet rcu_read_lock(); 1097b6c6712aSEric Dumazet dst = __sk_dst_get(sk); 1098b6c6712aSEric Dumazet if (dst) 10991da177e4SLinus Torvalds val = dst_mtu(dst); 1100b6c6712aSEric Dumazet rcu_read_unlock(); 11011da177e4SLinus Torvalds if (!val) 11021da177e4SLinus Torvalds return -ENOTCONN; 11031da177e4SLinus Torvalds break; 11041da177e4SLinus Torvalds } 11051da177e4SLinus Torvalds 11061da177e4SLinus Torvalds case IPV6_V6ONLY: 11079fe516baSEric Dumazet val = sk->sk_ipv6only; 11081da177e4SLinus Torvalds break; 11091da177e4SLinus Torvalds 1110333fad53SYOSHIFUJI Hideaki case IPV6_RECVPKTINFO: 11111da177e4SLinus Torvalds val = np->rxopt.bits.rxinfo; 11121da177e4SLinus Torvalds break; 11131da177e4SLinus Torvalds 1114333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 1115333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.rxoinfo; 1116333fad53SYOSHIFUJI Hideaki break; 1117333fad53SYOSHIFUJI Hideaki 1118333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPLIMIT: 11191da177e4SLinus Torvalds val = np->rxopt.bits.rxhlim; 11201da177e4SLinus Torvalds break; 11211da177e4SLinus Torvalds 1122333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 1123333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.rxohlim; 1124333fad53SYOSHIFUJI Hideaki break; 1125333fad53SYOSHIFUJI Hideaki 1126333fad53SYOSHIFUJI Hideaki case IPV6_RECVRTHDR: 11271da177e4SLinus Torvalds val = np->rxopt.bits.srcrt; 11281da177e4SLinus Torvalds break; 11291da177e4SLinus Torvalds 1130333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 1131333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.osrcrt; 1132333fad53SYOSHIFUJI Hideaki break; 1133333fad53SYOSHIFUJI Hideaki 11341da177e4SLinus Torvalds case IPV6_HOPOPTS: 1135333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 1136333fad53SYOSHIFUJI Hideaki case IPV6_RTHDR: 1137333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 1138333fad53SYOSHIFUJI Hideaki { 113945f6fad8SEric Dumazet struct ipv6_txoptions *opt; 1140333fad53SYOSHIFUJI Hideaki 1141333fad53SYOSHIFUJI Hideaki lock_sock(sk); 11421e1d04e6SHannes Frederic Sowa opt = rcu_dereference_protected(np->opt, 11431e1d04e6SHannes Frederic Sowa lockdep_sock_is_held(sk)); 114445f6fad8SEric Dumazet len = ipv6_getsockopt_sticky(sk, opt, optname, optval, len); 1145333fad53SYOSHIFUJI Hideaki release_sock(sk); 114605335c22SYang Hongyang /* check if ipv6_getsockopt_sticky() returns err code */ 114705335c22SYang Hongyang if (len < 0) 114805335c22SYang Hongyang return len; 1149333fad53SYOSHIFUJI Hideaki return put_user(len, optlen); 1150333fad53SYOSHIFUJI Hideaki } 1151333fad53SYOSHIFUJI Hideaki 1152333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPOPTS: 11531da177e4SLinus Torvalds val = np->rxopt.bits.hopopts; 11541da177e4SLinus Torvalds break; 11551da177e4SLinus Torvalds 1156333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 1157333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.ohopopts; 1158333fad53SYOSHIFUJI Hideaki break; 1159333fad53SYOSHIFUJI Hideaki 1160333fad53SYOSHIFUJI Hideaki case IPV6_RECVDSTOPTS: 11611da177e4SLinus Torvalds val = np->rxopt.bits.dstopts; 11621da177e4SLinus Torvalds break; 11631da177e4SLinus Torvalds 1164333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 1165333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.odstopts; 1166333fad53SYOSHIFUJI Hideaki break; 1167333fad53SYOSHIFUJI Hideaki 116841a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 116941a1f8eaSYOSHIFUJI Hideaki val = np->tclass; 117041a1f8eaSYOSHIFUJI Hideaki break; 117141a1f8eaSYOSHIFUJI Hideaki 117241a1f8eaSYOSHIFUJI Hideaki case IPV6_RECVTCLASS: 117341a1f8eaSYOSHIFUJI Hideaki val = np->rxopt.bits.rxtclass; 117441a1f8eaSYOSHIFUJI Hideaki break; 117541a1f8eaSYOSHIFUJI Hideaki 11761da177e4SLinus Torvalds case IPV6_FLOWINFO: 11771da177e4SLinus Torvalds val = np->rxopt.bits.rxflow; 11781da177e4SLinus Torvalds break; 11791da177e4SLinus Torvalds 1180793b1473SBrian Haley case IPV6_RECVPATHMTU: 1181793b1473SBrian Haley val = np->rxopt.bits.rxpmtu; 1182793b1473SBrian Haley break; 1183793b1473SBrian Haley 1184793b1473SBrian Haley case IPV6_PATHMTU: 1185793b1473SBrian Haley { 1186793b1473SBrian Haley struct dst_entry *dst; 1187793b1473SBrian Haley struct ip6_mtuinfo mtuinfo; 1188793b1473SBrian Haley 1189793b1473SBrian Haley if (len < sizeof(mtuinfo)) 1190793b1473SBrian Haley return -EINVAL; 1191793b1473SBrian Haley 1192793b1473SBrian Haley len = sizeof(mtuinfo); 1193793b1473SBrian Haley memset(&mtuinfo, 0, sizeof(mtuinfo)); 1194793b1473SBrian Haley 1195793b1473SBrian Haley rcu_read_lock(); 1196793b1473SBrian Haley dst = __sk_dst_get(sk); 1197793b1473SBrian Haley if (dst) 1198793b1473SBrian Haley mtuinfo.ip6m_mtu = dst_mtu(dst); 1199793b1473SBrian Haley rcu_read_unlock(); 1200793b1473SBrian Haley if (!mtuinfo.ip6m_mtu) 1201793b1473SBrian Haley return -ENOTCONN; 1202793b1473SBrian Haley 1203793b1473SBrian Haley if (put_user(len, optlen)) 1204793b1473SBrian Haley return -EFAULT; 1205793b1473SBrian Haley if (copy_to_user(optval, &mtuinfo, len)) 1206793b1473SBrian Haley return -EFAULT; 1207793b1473SBrian Haley 1208793b1473SBrian Haley return 0; 1209793b1473SBrian Haley } 1210793b1473SBrian Haley 12116c468622SBalazs Scheidler case IPV6_TRANSPARENT: 12126c468622SBalazs Scheidler val = inet_sk(sk)->transparent; 12136c468622SBalazs Scheidler break; 12146c468622SBalazs Scheidler 12156c468622SBalazs Scheidler case IPV6_RECVORIGDSTADDR: 12166c468622SBalazs Scheidler val = np->rxopt.bits.rxorigdstaddr; 12176c468622SBalazs Scheidler break; 12186c468622SBalazs Scheidler 12191da177e4SLinus Torvalds case IPV6_UNICAST_HOPS: 12201da177e4SLinus Torvalds case IPV6_MULTICAST_HOPS: 1221befffe90SBrian Haley { 1222befffe90SBrian Haley struct dst_entry *dst; 1223befffe90SBrian Haley 1224befffe90SBrian Haley if (optname == IPV6_UNICAST_HOPS) 1225befffe90SBrian Haley val = np->hop_limit; 1226befffe90SBrian Haley else 12271da177e4SLinus Torvalds val = np->mcast_hops; 1228befffe90SBrian Haley 1229b6c6712aSEric Dumazet if (val < 0) { 1230b6c6712aSEric Dumazet rcu_read_lock(); 1231b6c6712aSEric Dumazet dst = __sk_dst_get(sk); 1232b6c6712aSEric Dumazet if (dst) 12336b75d090SYOSHIFUJI Hideaki val = ip6_dst_hoplimit(dst); 1234b6c6712aSEric Dumazet rcu_read_unlock(); 1235befffe90SBrian Haley } 1236b6c6712aSEric Dumazet 1237befffe90SBrian Haley if (val < 0) 123853b7997fSYOSHIFUJI Hideaki val = sock_net(sk)->ipv6.devconf_all->hop_limit; 12391da177e4SLinus Torvalds break; 1240befffe90SBrian Haley } 12411da177e4SLinus Torvalds 12421da177e4SLinus Torvalds case IPV6_MULTICAST_LOOP: 12431da177e4SLinus Torvalds val = np->mc_loop; 12441da177e4SLinus Torvalds break; 12451da177e4SLinus Torvalds 12461da177e4SLinus Torvalds case IPV6_MULTICAST_IF: 12471da177e4SLinus Torvalds val = np->mcast_oif; 12481da177e4SLinus Torvalds break; 12491da177e4SLinus Torvalds 1250c4062dfcSErich E. Hoover case IPV6_UNICAST_IF: 1251c4062dfcSErich E. Hoover val = (__force int)htonl((__u32) np->ucast_oif); 1252c4062dfcSErich E. Hoover break; 1253c4062dfcSErich E. Hoover 12541da177e4SLinus Torvalds case IPV6_MTU_DISCOVER: 12551da177e4SLinus Torvalds val = np->pmtudisc; 12561da177e4SLinus Torvalds break; 12571da177e4SLinus Torvalds 12581da177e4SLinus Torvalds case IPV6_RECVERR: 12591da177e4SLinus Torvalds val = np->recverr; 12601da177e4SLinus Torvalds break; 12611da177e4SLinus Torvalds 12621da177e4SLinus Torvalds case IPV6_FLOWINFO_SEND: 12631da177e4SLinus Torvalds val = np->sndflow; 12641da177e4SLinus Torvalds break; 12651da177e4SLinus Torvalds 12663fdfa5ffSFlorent Fourcot case IPV6_FLOWLABEL_MGR: 12673fdfa5ffSFlorent Fourcot { 12683fdfa5ffSFlorent Fourcot struct in6_flowlabel_req freq; 126946e5f401SFlorent Fourcot int flags; 12703fdfa5ffSFlorent Fourcot 12713fdfa5ffSFlorent Fourcot if (len < sizeof(freq)) 12723fdfa5ffSFlorent Fourcot return -EINVAL; 12733fdfa5ffSFlorent Fourcot 12743fdfa5ffSFlorent Fourcot if (copy_from_user(&freq, optval, sizeof(freq))) 12753fdfa5ffSFlorent Fourcot return -EFAULT; 12763fdfa5ffSFlorent Fourcot 12773fdfa5ffSFlorent Fourcot if (freq.flr_action != IPV6_FL_A_GET) 12783fdfa5ffSFlorent Fourcot return -EINVAL; 12793fdfa5ffSFlorent Fourcot 12803fdfa5ffSFlorent Fourcot len = sizeof(freq); 128146e5f401SFlorent Fourcot flags = freq.flr_flags; 128246e5f401SFlorent Fourcot 12833fdfa5ffSFlorent Fourcot memset(&freq, 0, sizeof(freq)); 12843fdfa5ffSFlorent Fourcot 128546e5f401SFlorent Fourcot val = ipv6_flowlabel_opt_get(sk, &freq, flags); 12863fdfa5ffSFlorent Fourcot if (val < 0) 12873fdfa5ffSFlorent Fourcot return val; 12883fdfa5ffSFlorent Fourcot 12893fdfa5ffSFlorent Fourcot if (put_user(len, optlen)) 12903fdfa5ffSFlorent Fourcot return -EFAULT; 12913fdfa5ffSFlorent Fourcot if (copy_to_user(optval, &freq, len)) 12923fdfa5ffSFlorent Fourcot return -EFAULT; 12933fdfa5ffSFlorent Fourcot 12943fdfa5ffSFlorent Fourcot return 0; 12953fdfa5ffSFlorent Fourcot } 12963fdfa5ffSFlorent Fourcot 12977cbca67cSYOSHIFUJI Hideaki case IPV6_ADDR_PREFERENCES: 12987cbca67cSYOSHIFUJI Hideaki val = 0; 12997cbca67cSYOSHIFUJI Hideaki 13007cbca67cSYOSHIFUJI Hideaki if (np->srcprefs & IPV6_PREFER_SRC_TMP) 13017cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_TMP; 13027cbca67cSYOSHIFUJI Hideaki else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) 13037cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_PUBLIC; 13047cbca67cSYOSHIFUJI Hideaki else { 13057cbca67cSYOSHIFUJI Hideaki /* XXX: should we return system default? */ 13067cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; 13077cbca67cSYOSHIFUJI Hideaki } 13087cbca67cSYOSHIFUJI Hideaki 13097cbca67cSYOSHIFUJI Hideaki if (np->srcprefs & IPV6_PREFER_SRC_COA) 13107cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_COA; 13117cbca67cSYOSHIFUJI Hideaki else 13127cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_HOME; 13137cbca67cSYOSHIFUJI Hideaki break; 13147cbca67cSYOSHIFUJI Hideaki 1315e802af9cSStephen Hemminger case IPV6_MINHOPCOUNT: 1316e802af9cSStephen Hemminger val = np->min_hopcount; 1317e802af9cSStephen Hemminger break; 1318e802af9cSStephen Hemminger 1319793b1473SBrian Haley case IPV6_DONTFRAG: 1320793b1473SBrian Haley val = np->dontfrag; 1321793b1473SBrian Haley break; 1322793b1473SBrian Haley 1323cb1ce2efSTom Herbert case IPV6_AUTOFLOWLABEL: 1324cb1ce2efSTom Herbert val = np->autoflowlabel; 1325cb1ce2efSTom Herbert break; 1326cb1ce2efSTom Herbert 13270cc0aa61SWillem de Bruijn case IPV6_RECVFRAGSIZE: 13280cc0aa61SWillem de Bruijn val = np->rxopt.bits.recvfragsize; 13290cc0aa61SWillem de Bruijn break; 13300cc0aa61SWillem de Bruijn 13311da177e4SLinus Torvalds default: 1332cf6fc4a9SWei Yongjun return -ENOPROTOOPT; 13331da177e4SLinus Torvalds } 13341da177e4SLinus Torvalds len = min_t(unsigned int, sizeof(int), len); 13351da177e4SLinus Torvalds if (put_user(len, optlen)) 13361da177e4SLinus Torvalds return -EFAULT; 13371da177e4SLinus Torvalds if (copy_to_user(optval, &val, len)) 13381da177e4SLinus Torvalds return -EFAULT; 13391da177e4SLinus Torvalds return 0; 13401da177e4SLinus Torvalds } 13411da177e4SLinus Torvalds 13423fdadf7dSDmitry Mishin int ipv6_getsockopt(struct sock *sk, int level, int optname, 13433fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 13443fdadf7dSDmitry Mishin { 13453fdadf7dSDmitry Mishin int err; 13463fdadf7dSDmitry Mishin 13473fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) 13483fdadf7dSDmitry Mishin return udp_prot.getsockopt(sk, level, optname, optval, optlen); 13493fdadf7dSDmitry Mishin 13503fdadf7dSDmitry Mishin if (level != SOL_IPV6) 13513fdadf7dSDmitry Mishin return -ENOPROTOOPT; 13523fdadf7dSDmitry Mishin 135398e77438SDaniel Baluta err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 0); 13543fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 1355cf6fc4a9SWei Yongjun /* we need to exclude all possible ENOPROTOOPTs except default case */ 1356cf6fc4a9SWei Yongjun if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { 13573fdadf7dSDmitry Mishin int len; 13583fdadf7dSDmitry Mishin 13593fdadf7dSDmitry Mishin if (get_user(len, optlen)) 13603fdadf7dSDmitry Mishin return -EFAULT; 13613fdadf7dSDmitry Mishin 13623fdadf7dSDmitry Mishin lock_sock(sk); 13633fdadf7dSDmitry Mishin err = nf_getsockopt(sk, PF_INET6, optname, optval, 13643fdadf7dSDmitry Mishin &len); 13653fdadf7dSDmitry Mishin release_sock(sk); 13663fdadf7dSDmitry Mishin if (err >= 0) 13673fdadf7dSDmitry Mishin err = put_user(len, optlen); 13683fdadf7dSDmitry Mishin } 13693fdadf7dSDmitry Mishin #endif 13703fdadf7dSDmitry Mishin return err; 13713fdadf7dSDmitry Mishin } 13727159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_getsockopt); 13737159039aSYOSHIFUJI Hideaki 13743fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 13753fdadf7dSDmitry Mishin int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, 13763fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 13773fdadf7dSDmitry Mishin { 13783fdadf7dSDmitry Mishin int err; 13793fdadf7dSDmitry Mishin 13803fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) { 1381543d9cfeSArnaldo Carvalho de Melo if (udp_prot.compat_getsockopt != NULL) 1382543d9cfeSArnaldo Carvalho de Melo return udp_prot.compat_getsockopt(sk, level, optname, 1383543d9cfeSArnaldo Carvalho de Melo optval, optlen); 1384543d9cfeSArnaldo Carvalho de Melo return udp_prot.getsockopt(sk, level, optname, optval, optlen); 13853fdadf7dSDmitry Mishin } 13863fdadf7dSDmitry Mishin 13873fdadf7dSDmitry Mishin if (level != SOL_IPV6) 13883fdadf7dSDmitry Mishin return -ENOPROTOOPT; 13893fdadf7dSDmitry Mishin 139080991790SPavel Emelyanov if (optname == MCAST_MSFILTER) 139180991790SPavel Emelyanov return compat_mc_getsockopt(sk, level, optname, optval, optlen, 139280991790SPavel Emelyanov ipv6_getsockopt); 139380991790SPavel Emelyanov 139498e77438SDaniel Baluta err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 139598e77438SDaniel Baluta MSG_CMSG_COMPAT); 13963fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 1397cf6fc4a9SWei Yongjun /* we need to exclude all possible ENOPROTOOPTs except default case */ 1398cf6fc4a9SWei Yongjun if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { 13993fdadf7dSDmitry Mishin int len; 14003fdadf7dSDmitry Mishin 14013fdadf7dSDmitry Mishin if (get_user(len, optlen)) 14023fdadf7dSDmitry Mishin return -EFAULT; 14033fdadf7dSDmitry Mishin 14043fdadf7dSDmitry Mishin lock_sock(sk); 1405543d9cfeSArnaldo Carvalho de Melo err = compat_nf_getsockopt(sk, PF_INET6, 1406543d9cfeSArnaldo Carvalho de Melo optname, optval, &len); 14073fdadf7dSDmitry Mishin release_sock(sk); 14083fdadf7dSDmitry Mishin if (err >= 0) 14093fdadf7dSDmitry Mishin err = put_user(len, optlen); 14103fdadf7dSDmitry Mishin } 14113fdadf7dSDmitry Mishin #endif 14123fdadf7dSDmitry Mishin return err; 14133fdadf7dSDmitry Mishin } 1414543d9cfeSArnaldo Carvalho de Melo EXPORT_SYMBOL(compat_ipv6_getsockopt); 14153fdadf7dSDmitry Mishin #endif 14163fdadf7dSDmitry Mishin 1417