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 Return -EINVAL for setsockopt of short lengths 201da177e4SLinus Torvalds * o Truncate getsockopt returns 211da177e4SLinus Torvalds * o Return an optlen of the truncated length if need be 221da177e4SLinus Torvalds * 231da177e4SLinus Torvalds * Changes: 241da177e4SLinus Torvalds * David L Stevens <dlstevens@us.ibm.com>: 251da177e4SLinus Torvalds * - added multicast source filtering API for MLDv2 261da177e4SLinus Torvalds */ 271da177e4SLinus Torvalds 281da177e4SLinus Torvalds #include <linux/module.h> 294fc268d2SRandy Dunlap #include <linux/capability.h> 301da177e4SLinus Torvalds #include <linux/config.h> 311da177e4SLinus Torvalds #include <linux/errno.h> 321da177e4SLinus Torvalds #include <linux/types.h> 331da177e4SLinus Torvalds #include <linux/socket.h> 341da177e4SLinus Torvalds #include <linux/sockios.h> 351da177e4SLinus Torvalds #include <linux/sched.h> 361da177e4SLinus Torvalds #include <linux/net.h> 371da177e4SLinus Torvalds #include <linux/in6.h> 381da177e4SLinus Torvalds #include <linux/netdevice.h> 391da177e4SLinus Torvalds #include <linux/if_arp.h> 401da177e4SLinus Torvalds #include <linux/init.h> 411da177e4SLinus Torvalds #include <linux/sysctl.h> 421da177e4SLinus Torvalds #include <linux/netfilter.h> 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds #include <net/sock.h> 451da177e4SLinus Torvalds #include <net/snmp.h> 461da177e4SLinus Torvalds #include <net/ipv6.h> 471da177e4SLinus Torvalds #include <net/ndisc.h> 481da177e4SLinus Torvalds #include <net/protocol.h> 491da177e4SLinus Torvalds #include <net/transp_v6.h> 501da177e4SLinus Torvalds #include <net/ip6_route.h> 511da177e4SLinus Torvalds #include <net/addrconf.h> 521da177e4SLinus Torvalds #include <net/inet_common.h> 531da177e4SLinus Torvalds #include <net/tcp.h> 541da177e4SLinus Torvalds #include <net/udp.h> 551da177e4SLinus Torvalds #include <net/xfrm.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 static struct packet_type ipv6_packet_type = { 621da177e4SLinus Torvalds .type = __constant_htons(ETH_P_IPV6), 631da177e4SLinus Torvalds .func = ipv6_rcv, 641da177e4SLinus Torvalds }; 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds struct ip6_ra_chain *ip6_ra_chain; 671da177e4SLinus Torvalds DEFINE_RWLOCK(ip6_ra_lock); 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *)) 701da177e4SLinus Torvalds { 711da177e4SLinus Torvalds struct ip6_ra_chain *ra, *new_ra, **rap; 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds /* RA packet may be delivered ONLY to IPPROTO_RAW socket */ 741da177e4SLinus Torvalds if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW) 751da177e4SLinus Torvalds return -EINVAL; 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; 781da177e4SLinus Torvalds 791da177e4SLinus Torvalds write_lock_bh(&ip6_ra_lock); 801da177e4SLinus Torvalds for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) { 811da177e4SLinus Torvalds if (ra->sk == sk) { 821da177e4SLinus Torvalds if (sel>=0) { 831da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 841da177e4SLinus Torvalds kfree(new_ra); 851da177e4SLinus Torvalds return -EADDRINUSE; 861da177e4SLinus Torvalds } 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds *rap = ra->next; 891da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 901da177e4SLinus Torvalds 911da177e4SLinus Torvalds if (ra->destructor) 921da177e4SLinus Torvalds ra->destructor(sk); 931da177e4SLinus Torvalds sock_put(sk); 941da177e4SLinus Torvalds kfree(ra); 951da177e4SLinus Torvalds return 0; 961da177e4SLinus Torvalds } 971da177e4SLinus Torvalds } 981da177e4SLinus Torvalds if (new_ra == NULL) { 991da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 1001da177e4SLinus Torvalds return -ENOBUFS; 1011da177e4SLinus Torvalds } 1021da177e4SLinus Torvalds new_ra->sk = sk; 1031da177e4SLinus Torvalds new_ra->sel = sel; 1041da177e4SLinus Torvalds new_ra->destructor = destructor; 1051da177e4SLinus Torvalds new_ra->next = ra; 1061da177e4SLinus Torvalds *rap = new_ra; 1071da177e4SLinus Torvalds sock_hold(sk); 1081da177e4SLinus Torvalds write_unlock_bh(&ip6_ra_lock); 1091da177e4SLinus Torvalds return 0; 1101da177e4SLinus Torvalds } 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds int ipv6_setsockopt(struct sock *sk, int level, int optname, 1131da177e4SLinus Torvalds char __user *optval, int optlen) 1141da177e4SLinus Torvalds { 1151da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 1161da177e4SLinus Torvalds int val, valbool; 1171da177e4SLinus Torvalds int retv = -ENOPROTOOPT; 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds if (level == SOL_IP && sk->sk_type != SOCK_RAW) 1201da177e4SLinus Torvalds return udp_prot.setsockopt(sk, level, optname, optval, optlen); 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds if(level!=SOL_IPV6) 1231da177e4SLinus Torvalds goto out; 1241da177e4SLinus Torvalds 1251da177e4SLinus Torvalds if (optval == NULL) 1261da177e4SLinus Torvalds val=0; 1271da177e4SLinus Torvalds else if (get_user(val, (int __user *) optval)) 1281da177e4SLinus Torvalds return -EFAULT; 1291da177e4SLinus Torvalds 1301da177e4SLinus Torvalds valbool = (val!=0); 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvalds lock_sock(sk); 1331da177e4SLinus Torvalds 1341da177e4SLinus Torvalds switch (optname) { 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds case IPV6_ADDRFORM: 1371da177e4SLinus Torvalds if (val == PF_INET) { 1381da177e4SLinus Torvalds struct ipv6_txoptions *opt; 1391da177e4SLinus Torvalds struct sk_buff *pktopt; 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds if (sk->sk_protocol != IPPROTO_UDP && 1421da177e4SLinus Torvalds sk->sk_protocol != IPPROTO_TCP) 1431da177e4SLinus Torvalds break; 1441da177e4SLinus Torvalds 1451da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) { 1461da177e4SLinus Torvalds retv = -ENOTCONN; 1471da177e4SLinus Torvalds break; 1481da177e4SLinus Torvalds } 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds if (ipv6_only_sock(sk) || 1511da177e4SLinus Torvalds !(ipv6_addr_type(&np->daddr) & IPV6_ADDR_MAPPED)) { 1521da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 1531da177e4SLinus Torvalds break; 1541da177e4SLinus Torvalds } 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds fl6_free_socklist(sk); 1571da177e4SLinus Torvalds ipv6_sock_mc_close(sk); 1581da177e4SLinus Torvalds 159e6848976SArnaldo Carvalho de Melo /* 160e6848976SArnaldo Carvalho de Melo * Sock is moving from IPv6 to IPv4 (sk_prot), so 161e6848976SArnaldo Carvalho de Melo * remove it from the refcnt debug socks count in the 162e6848976SArnaldo Carvalho de Melo * original family... 163e6848976SArnaldo Carvalho de Melo */ 164e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_dec(sk); 165e6848976SArnaldo Carvalho de Melo 1661da177e4SLinus Torvalds if (sk->sk_protocol == IPPROTO_TCP) { 167d83d8461SArnaldo Carvalho de Melo struct inet_connection_sock *icsk = inet_csk(sk); 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds local_bh_disable(); 1701da177e4SLinus Torvalds sock_prot_dec_use(sk->sk_prot); 1711da177e4SLinus Torvalds sock_prot_inc_use(&tcp_prot); 1721da177e4SLinus Torvalds local_bh_enable(); 1731da177e4SLinus Torvalds sk->sk_prot = &tcp_prot; 174d83d8461SArnaldo Carvalho de Melo icsk->icsk_af_ops = &ipv4_specific; 1751da177e4SLinus Torvalds sk->sk_socket->ops = &inet_stream_ops; 1761da177e4SLinus Torvalds sk->sk_family = PF_INET; 177d83d8461SArnaldo Carvalho de Melo tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); 1781da177e4SLinus Torvalds } else { 1791da177e4SLinus Torvalds local_bh_disable(); 1801da177e4SLinus Torvalds sock_prot_dec_use(sk->sk_prot); 1811da177e4SLinus Torvalds sock_prot_inc_use(&udp_prot); 1821da177e4SLinus Torvalds local_bh_enable(); 1831da177e4SLinus Torvalds sk->sk_prot = &udp_prot; 1841da177e4SLinus Torvalds sk->sk_socket->ops = &inet_dgram_ops; 1851da177e4SLinus Torvalds sk->sk_family = PF_INET; 1861da177e4SLinus Torvalds } 1871da177e4SLinus Torvalds opt = xchg(&np->opt, NULL); 1881da177e4SLinus Torvalds if (opt) 1891da177e4SLinus Torvalds sock_kfree_s(sk, opt, opt->tot_len); 1901da177e4SLinus Torvalds pktopt = xchg(&np->pktoptions, NULL); 1911da177e4SLinus Torvalds if (pktopt) 1921da177e4SLinus Torvalds kfree_skb(pktopt); 1931da177e4SLinus Torvalds 1941da177e4SLinus Torvalds sk->sk_destruct = inet_sock_destruct; 195e6848976SArnaldo Carvalho de Melo /* 196e6848976SArnaldo Carvalho de Melo * ... and add it to the refcnt debug socks count 197e6848976SArnaldo Carvalho de Melo * in the new family. -acme 198e6848976SArnaldo Carvalho de Melo */ 199e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_inc(sk); 2001da177e4SLinus Torvalds module_put(THIS_MODULE); 2011da177e4SLinus Torvalds retv = 0; 2021da177e4SLinus Torvalds break; 2031da177e4SLinus Torvalds } 2041da177e4SLinus Torvalds goto e_inval; 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds case IPV6_V6ONLY: 2071da177e4SLinus Torvalds if (inet_sk(sk)->num) 2081da177e4SLinus Torvalds goto e_inval; 2091da177e4SLinus Torvalds np->ipv6only = valbool; 2101da177e4SLinus Torvalds retv = 0; 2111da177e4SLinus Torvalds break; 2121da177e4SLinus Torvalds 213333fad53SYOSHIFUJI Hideaki case IPV6_RECVPKTINFO: 2141da177e4SLinus Torvalds np->rxopt.bits.rxinfo = valbool; 2151da177e4SLinus Torvalds retv = 0; 2161da177e4SLinus Torvalds break; 2171da177e4SLinus Torvalds 218333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 219333fad53SYOSHIFUJI Hideaki np->rxopt.bits.rxoinfo = valbool; 220333fad53SYOSHIFUJI Hideaki retv = 0; 221333fad53SYOSHIFUJI Hideaki break; 222333fad53SYOSHIFUJI Hideaki 223333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPLIMIT: 2241da177e4SLinus Torvalds np->rxopt.bits.rxhlim = valbool; 2251da177e4SLinus Torvalds retv = 0; 2261da177e4SLinus Torvalds break; 2271da177e4SLinus Torvalds 228333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 229333fad53SYOSHIFUJI Hideaki np->rxopt.bits.rxohlim = valbool; 230333fad53SYOSHIFUJI Hideaki retv = 0; 231333fad53SYOSHIFUJI Hideaki break; 232333fad53SYOSHIFUJI Hideaki 233333fad53SYOSHIFUJI Hideaki case IPV6_RECVRTHDR: 2341da177e4SLinus Torvalds if (val < 0 || val > 2) 2351da177e4SLinus Torvalds goto e_inval; 2361da177e4SLinus Torvalds np->rxopt.bits.srcrt = val; 2371da177e4SLinus Torvalds retv = 0; 2381da177e4SLinus Torvalds break; 2391da177e4SLinus Torvalds 240333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 241333fad53SYOSHIFUJI Hideaki if (val < 0 || val > 2) 242333fad53SYOSHIFUJI Hideaki goto e_inval; 243333fad53SYOSHIFUJI Hideaki np->rxopt.bits.osrcrt = val; 244333fad53SYOSHIFUJI Hideaki retv = 0; 245333fad53SYOSHIFUJI Hideaki break; 246333fad53SYOSHIFUJI Hideaki 247333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPOPTS: 2481da177e4SLinus Torvalds np->rxopt.bits.hopopts = valbool; 2491da177e4SLinus Torvalds retv = 0; 2501da177e4SLinus Torvalds break; 2511da177e4SLinus Torvalds 252333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 253333fad53SYOSHIFUJI Hideaki np->rxopt.bits.ohopopts = valbool; 254333fad53SYOSHIFUJI Hideaki retv = 0; 255333fad53SYOSHIFUJI Hideaki break; 256333fad53SYOSHIFUJI Hideaki 257333fad53SYOSHIFUJI Hideaki case IPV6_RECVDSTOPTS: 2581da177e4SLinus Torvalds np->rxopt.bits.dstopts = valbool; 2591da177e4SLinus Torvalds retv = 0; 2601da177e4SLinus Torvalds break; 2611da177e4SLinus Torvalds 262333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 263333fad53SYOSHIFUJI Hideaki np->rxopt.bits.odstopts = valbool; 264333fad53SYOSHIFUJI Hideaki retv = 0; 265333fad53SYOSHIFUJI Hideaki break; 266333fad53SYOSHIFUJI Hideaki 26741a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 26841a1f8eaSYOSHIFUJI Hideaki if (val < 0 || val > 0xff) 26941a1f8eaSYOSHIFUJI Hideaki goto e_inval; 27041a1f8eaSYOSHIFUJI Hideaki np->tclass = val; 27141a1f8eaSYOSHIFUJI Hideaki retv = 0; 27241a1f8eaSYOSHIFUJI Hideaki break; 27341a1f8eaSYOSHIFUJI Hideaki 27441a1f8eaSYOSHIFUJI Hideaki case IPV6_RECVTCLASS: 27541a1f8eaSYOSHIFUJI Hideaki np->rxopt.bits.rxtclass = valbool; 27641a1f8eaSYOSHIFUJI Hideaki retv = 0; 27741a1f8eaSYOSHIFUJI Hideaki break; 27841a1f8eaSYOSHIFUJI Hideaki 2791da177e4SLinus Torvalds case IPV6_FLOWINFO: 2801da177e4SLinus Torvalds np->rxopt.bits.rxflow = valbool; 2811da177e4SLinus Torvalds retv = 0; 2821da177e4SLinus Torvalds break; 2831da177e4SLinus Torvalds 284333fad53SYOSHIFUJI Hideaki case IPV6_HOPOPTS: 285333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 286333fad53SYOSHIFUJI Hideaki case IPV6_RTHDR: 287333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 288333fad53SYOSHIFUJI Hideaki { 289333fad53SYOSHIFUJI Hideaki struct ipv6_txoptions *opt; 290333fad53SYOSHIFUJI Hideaki if (optlen == 0) 291cb422c46SLuiz Capitulino optval = NULL; 292333fad53SYOSHIFUJI Hideaki 293333fad53SYOSHIFUJI Hideaki /* hop-by-hop / destination options are privileged option */ 294333fad53SYOSHIFUJI Hideaki retv = -EPERM; 295333fad53SYOSHIFUJI Hideaki if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW)) 296333fad53SYOSHIFUJI Hideaki break; 297333fad53SYOSHIFUJI Hideaki 298333fad53SYOSHIFUJI Hideaki retv = -EINVAL; 299333fad53SYOSHIFUJI Hideaki if (optlen & 0x7 || optlen > 8 * 255) 300333fad53SYOSHIFUJI Hideaki break; 301333fad53SYOSHIFUJI Hideaki 302333fad53SYOSHIFUJI Hideaki opt = ipv6_renew_options(sk, np->opt, optname, 303333fad53SYOSHIFUJI Hideaki (struct ipv6_opt_hdr __user *)optval, 304333fad53SYOSHIFUJI Hideaki optlen); 305333fad53SYOSHIFUJI Hideaki if (IS_ERR(opt)) { 306333fad53SYOSHIFUJI Hideaki retv = PTR_ERR(opt); 307333fad53SYOSHIFUJI Hideaki break; 308333fad53SYOSHIFUJI Hideaki } 309333fad53SYOSHIFUJI Hideaki 310333fad53SYOSHIFUJI Hideaki /* routing header option needs extra check */ 311333fad53SYOSHIFUJI Hideaki if (optname == IPV6_RTHDR && opt->srcrt) { 312333fad53SYOSHIFUJI Hideaki struct ipv6_rt_hdr *rthdr = opt->srcrt; 313333fad53SYOSHIFUJI Hideaki if (rthdr->type) 314333fad53SYOSHIFUJI Hideaki goto sticky_done; 315333fad53SYOSHIFUJI Hideaki if ((rthdr->hdrlen & 1) || 316333fad53SYOSHIFUJI Hideaki (rthdr->hdrlen >> 1) != rthdr->segments_left) 317333fad53SYOSHIFUJI Hideaki goto sticky_done; 318333fad53SYOSHIFUJI Hideaki } 319333fad53SYOSHIFUJI Hideaki 320333fad53SYOSHIFUJI Hideaki retv = 0; 321d83d8461SArnaldo Carvalho de Melo if (inet_sk(sk)->is_icsk) { 322333fad53SYOSHIFUJI Hideaki if (opt) { 323d83d8461SArnaldo Carvalho de Melo struct inet_connection_sock *icsk = inet_csk(sk); 324333fad53SYOSHIFUJI Hideaki if (!((1 << sk->sk_state) & 325333fad53SYOSHIFUJI Hideaki (TCPF_LISTEN | TCPF_CLOSE)) 326333fad53SYOSHIFUJI Hideaki && inet_sk(sk)->daddr != LOOPBACK4_IPV6) { 327d83d8461SArnaldo Carvalho de Melo icsk->icsk_ext_hdr_len = 328d83d8461SArnaldo Carvalho de Melo opt->opt_flen + opt->opt_nflen; 329d83d8461SArnaldo Carvalho de Melo icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); 330333fad53SYOSHIFUJI Hideaki } 331333fad53SYOSHIFUJI Hideaki } 332333fad53SYOSHIFUJI Hideaki opt = xchg(&np->opt, opt); 333333fad53SYOSHIFUJI Hideaki sk_dst_reset(sk); 334333fad53SYOSHIFUJI Hideaki } else { 335333fad53SYOSHIFUJI Hideaki write_lock(&sk->sk_dst_lock); 336333fad53SYOSHIFUJI Hideaki opt = xchg(&np->opt, opt); 337333fad53SYOSHIFUJI Hideaki write_unlock(&sk->sk_dst_lock); 338333fad53SYOSHIFUJI Hideaki sk_dst_reset(sk); 339333fad53SYOSHIFUJI Hideaki } 340333fad53SYOSHIFUJI Hideaki sticky_done: 341333fad53SYOSHIFUJI Hideaki if (opt) 342333fad53SYOSHIFUJI Hideaki sock_kfree_s(sk, opt, opt->tot_len); 343333fad53SYOSHIFUJI Hideaki break; 344333fad53SYOSHIFUJI Hideaki } 345333fad53SYOSHIFUJI Hideaki 346333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTOPTIONS: 3471da177e4SLinus Torvalds { 3481da177e4SLinus Torvalds struct ipv6_txoptions *opt = NULL; 3491da177e4SLinus Torvalds struct msghdr msg; 3501da177e4SLinus Torvalds struct flowi fl; 3511da177e4SLinus Torvalds int junk; 3521da177e4SLinus Torvalds 3531da177e4SLinus Torvalds fl.fl6_flowlabel = 0; 3541da177e4SLinus Torvalds fl.oif = sk->sk_bound_dev_if; 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds if (optlen == 0) 3571da177e4SLinus Torvalds goto update; 3581da177e4SLinus Torvalds 3591da177e4SLinus Torvalds /* 1K is probably excessive 3601da177e4SLinus Torvalds * 1K is surely not enough, 2K per standard header is 16K. 3611da177e4SLinus Torvalds */ 3621da177e4SLinus Torvalds retv = -EINVAL; 3631da177e4SLinus Torvalds if (optlen > 64*1024) 3641da177e4SLinus Torvalds break; 3651da177e4SLinus Torvalds 3661da177e4SLinus Torvalds opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); 3671da177e4SLinus Torvalds retv = -ENOBUFS; 3681da177e4SLinus Torvalds if (opt == NULL) 3691da177e4SLinus Torvalds break; 3701da177e4SLinus Torvalds 3711da177e4SLinus Torvalds memset(opt, 0, sizeof(*opt)); 3721da177e4SLinus Torvalds opt->tot_len = sizeof(*opt) + optlen; 3731da177e4SLinus Torvalds retv = -EFAULT; 3741da177e4SLinus Torvalds if (copy_from_user(opt+1, optval, optlen)) 3751da177e4SLinus Torvalds goto done; 3761da177e4SLinus Torvalds 3771da177e4SLinus Torvalds msg.msg_controllen = optlen; 3781da177e4SLinus Torvalds msg.msg_control = (void*)(opt+1); 3791da177e4SLinus Torvalds 38041a1f8eaSYOSHIFUJI Hideaki retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk); 3811da177e4SLinus Torvalds if (retv) 3821da177e4SLinus Torvalds goto done; 3831da177e4SLinus Torvalds update: 3841da177e4SLinus Torvalds retv = 0; 385d83d8461SArnaldo Carvalho de Melo if (inet_sk(sk)->is_icsk) { 3861da177e4SLinus Torvalds if (opt) { 387d83d8461SArnaldo Carvalho de Melo struct inet_connection_sock *icsk = inet_csk(sk); 3881da177e4SLinus Torvalds if (!((1 << sk->sk_state) & 3891da177e4SLinus Torvalds (TCPF_LISTEN | TCPF_CLOSE)) 3901da177e4SLinus Torvalds && inet_sk(sk)->daddr != LOOPBACK4_IPV6) { 391d83d8461SArnaldo Carvalho de Melo icsk->icsk_ext_hdr_len = 392d83d8461SArnaldo Carvalho de Melo opt->opt_flen + opt->opt_nflen; 393d83d8461SArnaldo Carvalho de Melo icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); 3941da177e4SLinus Torvalds } 3951da177e4SLinus Torvalds } 3961da177e4SLinus Torvalds opt = xchg(&np->opt, opt); 3971da177e4SLinus Torvalds sk_dst_reset(sk); 3981da177e4SLinus Torvalds } else { 3991da177e4SLinus Torvalds write_lock(&sk->sk_dst_lock); 4001da177e4SLinus Torvalds opt = xchg(&np->opt, opt); 4011da177e4SLinus Torvalds write_unlock(&sk->sk_dst_lock); 4021da177e4SLinus Torvalds sk_dst_reset(sk); 4031da177e4SLinus Torvalds } 4041da177e4SLinus Torvalds 4051da177e4SLinus Torvalds done: 4061da177e4SLinus Torvalds if (opt) 4071da177e4SLinus Torvalds sock_kfree_s(sk, opt, opt->tot_len); 4081da177e4SLinus Torvalds break; 4091da177e4SLinus Torvalds } 4101da177e4SLinus Torvalds case IPV6_UNICAST_HOPS: 4111da177e4SLinus Torvalds if (val > 255 || val < -1) 4121da177e4SLinus Torvalds goto e_inval; 4131da177e4SLinus Torvalds np->hop_limit = val; 4141da177e4SLinus Torvalds retv = 0; 4151da177e4SLinus Torvalds break; 4161da177e4SLinus Torvalds 4171da177e4SLinus Torvalds case IPV6_MULTICAST_HOPS: 4181da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM) 4191da177e4SLinus Torvalds goto e_inval; 4201da177e4SLinus Torvalds if (val > 255 || val < -1) 4211da177e4SLinus Torvalds goto e_inval; 4221da177e4SLinus Torvalds np->mcast_hops = val; 4231da177e4SLinus Torvalds retv = 0; 4241da177e4SLinus Torvalds break; 4251da177e4SLinus Torvalds 4261da177e4SLinus Torvalds case IPV6_MULTICAST_LOOP: 4271da177e4SLinus Torvalds np->mc_loop = valbool; 4281da177e4SLinus Torvalds retv = 0; 4291da177e4SLinus Torvalds break; 4301da177e4SLinus Torvalds 4311da177e4SLinus Torvalds case IPV6_MULTICAST_IF: 4321da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM) 4331da177e4SLinus Torvalds goto e_inval; 4341da177e4SLinus Torvalds if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) 4351da177e4SLinus Torvalds goto e_inval; 4361da177e4SLinus Torvalds 4371da177e4SLinus Torvalds if (__dev_get_by_index(val) == NULL) { 4381da177e4SLinus Torvalds retv = -ENODEV; 4391da177e4SLinus Torvalds break; 4401da177e4SLinus Torvalds } 4411da177e4SLinus Torvalds np->mcast_oif = val; 4421da177e4SLinus Torvalds retv = 0; 4431da177e4SLinus Torvalds break; 4441da177e4SLinus Torvalds case IPV6_ADD_MEMBERSHIP: 4451da177e4SLinus Torvalds case IPV6_DROP_MEMBERSHIP: 4461da177e4SLinus Torvalds { 4471da177e4SLinus Torvalds struct ipv6_mreq mreq; 4481da177e4SLinus Torvalds 4491da177e4SLinus Torvalds retv = -EFAULT; 4501da177e4SLinus Torvalds if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) 4511da177e4SLinus Torvalds break; 4521da177e4SLinus Torvalds 4531da177e4SLinus Torvalds if (optname == IPV6_ADD_MEMBERSHIP) 4541da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); 4551da177e4SLinus Torvalds else 4561da177e4SLinus Torvalds retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); 4571da177e4SLinus Torvalds break; 4581da177e4SLinus Torvalds } 4591da177e4SLinus Torvalds case IPV6_JOIN_ANYCAST: 4601da177e4SLinus Torvalds case IPV6_LEAVE_ANYCAST: 4611da177e4SLinus Torvalds { 4621da177e4SLinus Torvalds struct ipv6_mreq mreq; 4631da177e4SLinus Torvalds 4641da177e4SLinus Torvalds if (optlen != sizeof(struct ipv6_mreq)) 4651da177e4SLinus Torvalds goto e_inval; 4661da177e4SLinus Torvalds 4671da177e4SLinus Torvalds retv = -EFAULT; 4681da177e4SLinus Torvalds if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) 4691da177e4SLinus Torvalds break; 4701da177e4SLinus Torvalds 4711da177e4SLinus Torvalds if (optname == IPV6_JOIN_ANYCAST) 4721da177e4SLinus Torvalds retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); 4731da177e4SLinus Torvalds else 4741da177e4SLinus Torvalds retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); 4751da177e4SLinus Torvalds break; 4761da177e4SLinus Torvalds } 4771da177e4SLinus Torvalds case MCAST_JOIN_GROUP: 4781da177e4SLinus Torvalds case MCAST_LEAVE_GROUP: 4791da177e4SLinus Torvalds { 4801da177e4SLinus Torvalds struct group_req greq; 4811da177e4SLinus Torvalds struct sockaddr_in6 *psin6; 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds retv = -EFAULT; 4841da177e4SLinus Torvalds if (copy_from_user(&greq, optval, sizeof(struct group_req))) 4851da177e4SLinus Torvalds break; 4861da177e4SLinus Torvalds if (greq.gr_group.ss_family != AF_INET6) { 4871da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 4881da177e4SLinus Torvalds break; 4891da177e4SLinus Torvalds } 4901da177e4SLinus Torvalds psin6 = (struct sockaddr_in6 *)&greq.gr_group; 4911da177e4SLinus Torvalds if (optname == MCAST_JOIN_GROUP) 4921da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, greq.gr_interface, 4931da177e4SLinus Torvalds &psin6->sin6_addr); 4941da177e4SLinus Torvalds else 4951da177e4SLinus Torvalds retv = ipv6_sock_mc_drop(sk, greq.gr_interface, 4961da177e4SLinus Torvalds &psin6->sin6_addr); 4971da177e4SLinus Torvalds break; 4981da177e4SLinus Torvalds } 4991da177e4SLinus Torvalds case MCAST_JOIN_SOURCE_GROUP: 5001da177e4SLinus Torvalds case MCAST_LEAVE_SOURCE_GROUP: 5011da177e4SLinus Torvalds case MCAST_BLOCK_SOURCE: 5021da177e4SLinus Torvalds case MCAST_UNBLOCK_SOURCE: 5031da177e4SLinus Torvalds { 5041da177e4SLinus Torvalds struct group_source_req greqs; 5051da177e4SLinus Torvalds int omode, add; 5061da177e4SLinus Torvalds 5071da177e4SLinus Torvalds if (optlen != sizeof(struct group_source_req)) 5081da177e4SLinus Torvalds goto e_inval; 5091da177e4SLinus Torvalds if (copy_from_user(&greqs, optval, sizeof(greqs))) { 5101da177e4SLinus Torvalds retv = -EFAULT; 5111da177e4SLinus Torvalds break; 5121da177e4SLinus Torvalds } 5131da177e4SLinus Torvalds if (greqs.gsr_group.ss_family != AF_INET6 || 5141da177e4SLinus Torvalds greqs.gsr_source.ss_family != AF_INET6) { 5151da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 5161da177e4SLinus Torvalds break; 5171da177e4SLinus Torvalds } 5181da177e4SLinus Torvalds if (optname == MCAST_BLOCK_SOURCE) { 5191da177e4SLinus Torvalds omode = MCAST_EXCLUDE; 5201da177e4SLinus Torvalds add = 1; 5211da177e4SLinus Torvalds } else if (optname == MCAST_UNBLOCK_SOURCE) { 5221da177e4SLinus Torvalds omode = MCAST_EXCLUDE; 5231da177e4SLinus Torvalds add = 0; 5241da177e4SLinus Torvalds } else if (optname == MCAST_JOIN_SOURCE_GROUP) { 5251da177e4SLinus Torvalds struct sockaddr_in6 *psin6; 5261da177e4SLinus Torvalds 5271da177e4SLinus Torvalds psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; 5281da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, 5291da177e4SLinus Torvalds &psin6->sin6_addr); 530c9e3e8b6SDavid L Stevens /* prior join w/ different source is ok */ 531c9e3e8b6SDavid L Stevens if (retv && retv != -EADDRINUSE) 5321da177e4SLinus Torvalds break; 5331da177e4SLinus Torvalds omode = MCAST_INCLUDE; 5341da177e4SLinus Torvalds add = 1; 535c9e3e8b6SDavid L Stevens } else /* MCAST_LEAVE_SOURCE_GROUP */ { 5361da177e4SLinus Torvalds omode = MCAST_INCLUDE; 5371da177e4SLinus Torvalds add = 0; 5381da177e4SLinus Torvalds } 5391da177e4SLinus Torvalds retv = ip6_mc_source(add, omode, sk, &greqs); 5401da177e4SLinus Torvalds break; 5411da177e4SLinus Torvalds } 5421da177e4SLinus Torvalds case MCAST_MSFILTER: 5431da177e4SLinus Torvalds { 5441da177e4SLinus Torvalds extern int sysctl_mld_max_msf; 5451da177e4SLinus Torvalds struct group_filter *gsf; 5461da177e4SLinus Torvalds 5471da177e4SLinus Torvalds if (optlen < GROUP_FILTER_SIZE(0)) 5481da177e4SLinus Torvalds goto e_inval; 5491da177e4SLinus Torvalds if (optlen > sysctl_optmem_max) { 5501da177e4SLinus Torvalds retv = -ENOBUFS; 5511da177e4SLinus Torvalds break; 5521da177e4SLinus Torvalds } 5538b3a7005SKris Katterjohn gsf = kmalloc(optlen,GFP_KERNEL); 5541da177e4SLinus Torvalds if (gsf == 0) { 5551da177e4SLinus Torvalds retv = -ENOBUFS; 5561da177e4SLinus Torvalds break; 5571da177e4SLinus Torvalds } 5581da177e4SLinus Torvalds retv = -EFAULT; 5591da177e4SLinus Torvalds if (copy_from_user(gsf, optval, optlen)) { 5601da177e4SLinus Torvalds kfree(gsf); 5611da177e4SLinus Torvalds break; 5621da177e4SLinus Torvalds } 5631da177e4SLinus Torvalds /* numsrc >= (4G-140)/128 overflow in 32 bits */ 5641da177e4SLinus Torvalds if (gsf->gf_numsrc >= 0x1ffffffU || 5651da177e4SLinus Torvalds gsf->gf_numsrc > sysctl_mld_max_msf) { 5661da177e4SLinus Torvalds kfree(gsf); 5671da177e4SLinus Torvalds retv = -ENOBUFS; 5681da177e4SLinus Torvalds break; 5691da177e4SLinus Torvalds } 5701da177e4SLinus Torvalds if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { 5711da177e4SLinus Torvalds kfree(gsf); 5721da177e4SLinus Torvalds retv = -EINVAL; 5731da177e4SLinus Torvalds break; 5741da177e4SLinus Torvalds } 5751da177e4SLinus Torvalds retv = ip6_mc_msfilter(sk, gsf); 5761da177e4SLinus Torvalds kfree(gsf); 5771da177e4SLinus Torvalds 5781da177e4SLinus Torvalds break; 5791da177e4SLinus Torvalds } 5801da177e4SLinus Torvalds case IPV6_ROUTER_ALERT: 5811da177e4SLinus Torvalds retv = ip6_ra_control(sk, val, NULL); 5821da177e4SLinus Torvalds break; 5831da177e4SLinus Torvalds case IPV6_MTU_DISCOVER: 5841da177e4SLinus Torvalds if (val<0 || val>2) 5851da177e4SLinus Torvalds goto e_inval; 5861da177e4SLinus Torvalds np->pmtudisc = val; 5871da177e4SLinus Torvalds retv = 0; 5881da177e4SLinus Torvalds break; 5891da177e4SLinus Torvalds case IPV6_MTU: 5901da177e4SLinus Torvalds if (val && val < IPV6_MIN_MTU) 5911da177e4SLinus Torvalds goto e_inval; 5921da177e4SLinus Torvalds np->frag_size = val; 5931da177e4SLinus Torvalds retv = 0; 5941da177e4SLinus Torvalds break; 5951da177e4SLinus Torvalds case IPV6_RECVERR: 5961da177e4SLinus Torvalds np->recverr = valbool; 5971da177e4SLinus Torvalds if (!val) 5981da177e4SLinus Torvalds skb_queue_purge(&sk->sk_error_queue); 5991da177e4SLinus Torvalds retv = 0; 6001da177e4SLinus Torvalds break; 6011da177e4SLinus Torvalds case IPV6_FLOWINFO_SEND: 6021da177e4SLinus Torvalds np->sndflow = valbool; 6031da177e4SLinus Torvalds retv = 0; 6041da177e4SLinus Torvalds break; 6051da177e4SLinus Torvalds case IPV6_FLOWLABEL_MGR: 6061da177e4SLinus Torvalds retv = ipv6_flowlabel_opt(sk, optval, optlen); 6071da177e4SLinus Torvalds break; 6081da177e4SLinus Torvalds case IPV6_IPSEC_POLICY: 6091da177e4SLinus Torvalds case IPV6_XFRM_POLICY: 6106fc0b4a7SHerbert Xu retv = -EPERM; 6116fc0b4a7SHerbert Xu if (!capable(CAP_NET_ADMIN)) 6126fc0b4a7SHerbert Xu break; 6131da177e4SLinus Torvalds retv = xfrm_user_policy(sk, optname, optval, optlen); 6141da177e4SLinus Torvalds break; 6151da177e4SLinus Torvalds 6161da177e4SLinus Torvalds #ifdef CONFIG_NETFILTER 6171da177e4SLinus Torvalds default: 6181da177e4SLinus Torvalds retv = nf_setsockopt(sk, PF_INET6, optname, optval, 6191da177e4SLinus Torvalds optlen); 6201da177e4SLinus Torvalds break; 6211da177e4SLinus Torvalds #endif 6221da177e4SLinus Torvalds 6231da177e4SLinus Torvalds } 6241da177e4SLinus Torvalds release_sock(sk); 6251da177e4SLinus Torvalds 6261da177e4SLinus Torvalds out: 6271da177e4SLinus Torvalds return retv; 6281da177e4SLinus Torvalds 6291da177e4SLinus Torvalds e_inval: 6301da177e4SLinus Torvalds release_sock(sk); 6311da177e4SLinus Torvalds return -EINVAL; 6321da177e4SLinus Torvalds } 6331da177e4SLinus Torvalds 63434a0b3cdSAdrian Bunk static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_opt_hdr *hdr, 635333fad53SYOSHIFUJI Hideaki char __user *optval, int len) 636333fad53SYOSHIFUJI Hideaki { 637333fad53SYOSHIFUJI Hideaki if (!hdr) 638333fad53SYOSHIFUJI Hideaki return 0; 639333fad53SYOSHIFUJI Hideaki len = min_t(int, len, ipv6_optlen(hdr)); 640333fad53SYOSHIFUJI Hideaki if (copy_to_user(optval, hdr, ipv6_optlen(hdr))) 641333fad53SYOSHIFUJI Hideaki return -EFAULT; 642333fad53SYOSHIFUJI Hideaki return len; 643333fad53SYOSHIFUJI Hideaki } 644333fad53SYOSHIFUJI Hideaki 6451da177e4SLinus Torvalds int ipv6_getsockopt(struct sock *sk, int level, int optname, 6461da177e4SLinus Torvalds char __user *optval, int __user *optlen) 6471da177e4SLinus Torvalds { 6481da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 6491da177e4SLinus Torvalds int len; 6501da177e4SLinus Torvalds int val; 6511da177e4SLinus Torvalds 6521da177e4SLinus Torvalds if (level == SOL_IP && sk->sk_type != SOCK_RAW) 6531da177e4SLinus Torvalds return udp_prot.getsockopt(sk, level, optname, optval, optlen); 6541da177e4SLinus Torvalds if(level!=SOL_IPV6) 6551da177e4SLinus Torvalds return -ENOPROTOOPT; 6561da177e4SLinus Torvalds if (get_user(len, optlen)) 6571da177e4SLinus Torvalds return -EFAULT; 6581da177e4SLinus Torvalds switch (optname) { 6591da177e4SLinus Torvalds case IPV6_ADDRFORM: 6601da177e4SLinus Torvalds if (sk->sk_protocol != IPPROTO_UDP && 6611da177e4SLinus Torvalds sk->sk_protocol != IPPROTO_TCP) 6621da177e4SLinus Torvalds return -EINVAL; 6631da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) 6641da177e4SLinus Torvalds return -ENOTCONN; 6651da177e4SLinus Torvalds val = sk->sk_family; 6661da177e4SLinus Torvalds break; 6671da177e4SLinus Torvalds case MCAST_MSFILTER: 6681da177e4SLinus Torvalds { 6691da177e4SLinus Torvalds struct group_filter gsf; 6701da177e4SLinus Torvalds int err; 6711da177e4SLinus Torvalds 6721da177e4SLinus Torvalds if (len < GROUP_FILTER_SIZE(0)) 6731da177e4SLinus Torvalds return -EINVAL; 6741da177e4SLinus Torvalds if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) 6751da177e4SLinus Torvalds return -EFAULT; 6761da177e4SLinus Torvalds lock_sock(sk); 6771da177e4SLinus Torvalds err = ip6_mc_msfget(sk, &gsf, 6781da177e4SLinus Torvalds (struct group_filter __user *)optval, optlen); 6791da177e4SLinus Torvalds release_sock(sk); 6801da177e4SLinus Torvalds return err; 6811da177e4SLinus Torvalds } 6821da177e4SLinus Torvalds 683333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTOPTIONS: 6841da177e4SLinus Torvalds { 6851da177e4SLinus Torvalds struct msghdr msg; 6861da177e4SLinus Torvalds struct sk_buff *skb; 6871da177e4SLinus Torvalds 6881da177e4SLinus Torvalds if (sk->sk_type != SOCK_STREAM) 6891da177e4SLinus Torvalds return -ENOPROTOOPT; 6901da177e4SLinus Torvalds 6911da177e4SLinus Torvalds msg.msg_control = optval; 6921da177e4SLinus Torvalds msg.msg_controllen = len; 6931da177e4SLinus Torvalds msg.msg_flags = 0; 6941da177e4SLinus Torvalds 6951da177e4SLinus Torvalds lock_sock(sk); 6961da177e4SLinus Torvalds skb = np->pktoptions; 6971da177e4SLinus Torvalds if (skb) 6981da177e4SLinus Torvalds atomic_inc(&skb->users); 6991da177e4SLinus Torvalds release_sock(sk); 7001da177e4SLinus Torvalds 7011da177e4SLinus Torvalds if (skb) { 7021da177e4SLinus Torvalds int err = datagram_recv_ctl(sk, &msg, skb); 7031da177e4SLinus Torvalds kfree_skb(skb); 7041da177e4SLinus Torvalds if (err) 7051da177e4SLinus Torvalds return err; 7061da177e4SLinus Torvalds } else { 7071da177e4SLinus Torvalds if (np->rxopt.bits.rxinfo) { 7081da177e4SLinus Torvalds struct in6_pktinfo src_info; 7091da177e4SLinus Torvalds src_info.ipi6_ifindex = np->mcast_oif; 7101da177e4SLinus Torvalds ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); 7111da177e4SLinus Torvalds put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); 7121da177e4SLinus Torvalds } 7131da177e4SLinus Torvalds if (np->rxopt.bits.rxhlim) { 7141da177e4SLinus Torvalds int hlim = np->mcast_hops; 7151da177e4SLinus Torvalds put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); 7161da177e4SLinus Torvalds } 717333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxoinfo) { 718333fad53SYOSHIFUJI Hideaki struct in6_pktinfo src_info; 719333fad53SYOSHIFUJI Hideaki src_info.ipi6_ifindex = np->mcast_oif; 720333fad53SYOSHIFUJI Hideaki ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); 721333fad53SYOSHIFUJI Hideaki put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); 722333fad53SYOSHIFUJI Hideaki } 723333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxohlim) { 724333fad53SYOSHIFUJI Hideaki int hlim = np->mcast_hops; 725333fad53SYOSHIFUJI Hideaki put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); 726333fad53SYOSHIFUJI Hideaki } 7271da177e4SLinus Torvalds } 7281da177e4SLinus Torvalds len -= msg.msg_controllen; 7291da177e4SLinus Torvalds return put_user(len, optlen); 7301da177e4SLinus Torvalds } 7311da177e4SLinus Torvalds case IPV6_MTU: 7321da177e4SLinus Torvalds { 7331da177e4SLinus Torvalds struct dst_entry *dst; 7341da177e4SLinus Torvalds val = 0; 7351da177e4SLinus Torvalds lock_sock(sk); 7361da177e4SLinus Torvalds dst = sk_dst_get(sk); 7371da177e4SLinus Torvalds if (dst) { 7381da177e4SLinus Torvalds val = dst_mtu(dst); 7391da177e4SLinus Torvalds dst_release(dst); 7401da177e4SLinus Torvalds } 7411da177e4SLinus Torvalds release_sock(sk); 7421da177e4SLinus Torvalds if (!val) 7431da177e4SLinus Torvalds return -ENOTCONN; 7441da177e4SLinus Torvalds break; 7451da177e4SLinus Torvalds } 7461da177e4SLinus Torvalds 7471da177e4SLinus Torvalds case IPV6_V6ONLY: 7481da177e4SLinus Torvalds val = np->ipv6only; 7491da177e4SLinus Torvalds break; 7501da177e4SLinus Torvalds 751333fad53SYOSHIFUJI Hideaki case IPV6_RECVPKTINFO: 7521da177e4SLinus Torvalds val = np->rxopt.bits.rxinfo; 7531da177e4SLinus Torvalds break; 7541da177e4SLinus Torvalds 755333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 756333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.rxoinfo; 757333fad53SYOSHIFUJI Hideaki break; 758333fad53SYOSHIFUJI Hideaki 759333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPLIMIT: 7601da177e4SLinus Torvalds val = np->rxopt.bits.rxhlim; 7611da177e4SLinus Torvalds break; 7621da177e4SLinus Torvalds 763333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 764333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.rxohlim; 765333fad53SYOSHIFUJI Hideaki break; 766333fad53SYOSHIFUJI Hideaki 767333fad53SYOSHIFUJI Hideaki case IPV6_RECVRTHDR: 7681da177e4SLinus Torvalds val = np->rxopt.bits.srcrt; 7691da177e4SLinus Torvalds break; 7701da177e4SLinus Torvalds 771333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 772333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.osrcrt; 773333fad53SYOSHIFUJI Hideaki break; 774333fad53SYOSHIFUJI Hideaki 7751da177e4SLinus Torvalds case IPV6_HOPOPTS: 776333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 777333fad53SYOSHIFUJI Hideaki case IPV6_RTHDR: 778333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 779333fad53SYOSHIFUJI Hideaki { 780333fad53SYOSHIFUJI Hideaki 781333fad53SYOSHIFUJI Hideaki lock_sock(sk); 782333fad53SYOSHIFUJI Hideaki len = ipv6_getsockopt_sticky(sk, np->opt->hopopt, 783333fad53SYOSHIFUJI Hideaki optval, len); 784333fad53SYOSHIFUJI Hideaki release_sock(sk); 785333fad53SYOSHIFUJI Hideaki return put_user(len, optlen); 786333fad53SYOSHIFUJI Hideaki } 787333fad53SYOSHIFUJI Hideaki 788333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPOPTS: 7891da177e4SLinus Torvalds val = np->rxopt.bits.hopopts; 7901da177e4SLinus Torvalds break; 7911da177e4SLinus Torvalds 792333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 793333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.ohopopts; 794333fad53SYOSHIFUJI Hideaki break; 795333fad53SYOSHIFUJI Hideaki 796333fad53SYOSHIFUJI Hideaki case IPV6_RECVDSTOPTS: 7971da177e4SLinus Torvalds val = np->rxopt.bits.dstopts; 7981da177e4SLinus Torvalds break; 7991da177e4SLinus Torvalds 800333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 801333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.odstopts; 802333fad53SYOSHIFUJI Hideaki break; 803333fad53SYOSHIFUJI Hideaki 80441a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 80541a1f8eaSYOSHIFUJI Hideaki val = np->tclass; 80641a1f8eaSYOSHIFUJI Hideaki break; 80741a1f8eaSYOSHIFUJI Hideaki 80841a1f8eaSYOSHIFUJI Hideaki case IPV6_RECVTCLASS: 80941a1f8eaSYOSHIFUJI Hideaki val = np->rxopt.bits.rxtclass; 81041a1f8eaSYOSHIFUJI Hideaki break; 81141a1f8eaSYOSHIFUJI Hideaki 8121da177e4SLinus Torvalds case IPV6_FLOWINFO: 8131da177e4SLinus Torvalds val = np->rxopt.bits.rxflow; 8141da177e4SLinus Torvalds break; 8151da177e4SLinus Torvalds 8161da177e4SLinus Torvalds case IPV6_UNICAST_HOPS: 8171da177e4SLinus Torvalds val = np->hop_limit; 8181da177e4SLinus Torvalds break; 8191da177e4SLinus Torvalds 8201da177e4SLinus Torvalds case IPV6_MULTICAST_HOPS: 8211da177e4SLinus Torvalds val = np->mcast_hops; 8221da177e4SLinus Torvalds break; 8231da177e4SLinus Torvalds 8241da177e4SLinus Torvalds case IPV6_MULTICAST_LOOP: 8251da177e4SLinus Torvalds val = np->mc_loop; 8261da177e4SLinus Torvalds break; 8271da177e4SLinus Torvalds 8281da177e4SLinus Torvalds case IPV6_MULTICAST_IF: 8291da177e4SLinus Torvalds val = np->mcast_oif; 8301da177e4SLinus Torvalds break; 8311da177e4SLinus Torvalds 8321da177e4SLinus Torvalds case IPV6_MTU_DISCOVER: 8331da177e4SLinus Torvalds val = np->pmtudisc; 8341da177e4SLinus Torvalds break; 8351da177e4SLinus Torvalds 8361da177e4SLinus Torvalds case IPV6_RECVERR: 8371da177e4SLinus Torvalds val = np->recverr; 8381da177e4SLinus Torvalds break; 8391da177e4SLinus Torvalds 8401da177e4SLinus Torvalds case IPV6_FLOWINFO_SEND: 8411da177e4SLinus Torvalds val = np->sndflow; 8421da177e4SLinus Torvalds break; 8431da177e4SLinus Torvalds 8441da177e4SLinus Torvalds default: 8451da177e4SLinus Torvalds #ifdef CONFIG_NETFILTER 8461da177e4SLinus Torvalds lock_sock(sk); 8471da177e4SLinus Torvalds val = nf_getsockopt(sk, PF_INET6, optname, optval, 8481da177e4SLinus Torvalds &len); 8491da177e4SLinus Torvalds release_sock(sk); 8501da177e4SLinus Torvalds if (val >= 0) 8511da177e4SLinus Torvalds val = put_user(len, optlen); 8521da177e4SLinus Torvalds return val; 8531da177e4SLinus Torvalds #else 8541da177e4SLinus Torvalds return -EINVAL; 8551da177e4SLinus Torvalds #endif 8561da177e4SLinus Torvalds } 8571da177e4SLinus Torvalds len = min_t(unsigned int, sizeof(int), len); 8581da177e4SLinus Torvalds if(put_user(len, optlen)) 8591da177e4SLinus Torvalds return -EFAULT; 8601da177e4SLinus Torvalds if(copy_to_user(optval,&val,len)) 8611da177e4SLinus Torvalds return -EFAULT; 8621da177e4SLinus Torvalds return 0; 8631da177e4SLinus Torvalds } 8641da177e4SLinus Torvalds 8651da177e4SLinus Torvalds void __init ipv6_packet_init(void) 8661da177e4SLinus Torvalds { 8671da177e4SLinus Torvalds dev_add_pack(&ipv6_packet_type); 8681da177e4SLinus Torvalds } 8691da177e4SLinus Torvalds 8701da177e4SLinus Torvalds void ipv6_packet_cleanup(void) 8711da177e4SLinus Torvalds { 8721da177e4SLinus Torvalds dev_remove_pack(&ipv6_packet_type); 8731da177e4SLinus Torvalds } 874