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 1123fdadf7dSDmitry Mishin static int do_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 (optval == NULL) 1201da177e4SLinus Torvalds val=0; 1211da177e4SLinus Torvalds else if (get_user(val, (int __user *) optval)) 1221da177e4SLinus Torvalds return -EFAULT; 1231da177e4SLinus Torvalds 1241da177e4SLinus Torvalds valbool = (val!=0); 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds lock_sock(sk); 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds switch (optname) { 1291da177e4SLinus Torvalds 1301da177e4SLinus Torvalds case IPV6_ADDRFORM: 1311da177e4SLinus Torvalds if (val == PF_INET) { 1321da177e4SLinus Torvalds struct ipv6_txoptions *opt; 1331da177e4SLinus Torvalds struct sk_buff *pktopt; 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds if (sk->sk_protocol != IPPROTO_UDP && 1361da177e4SLinus Torvalds sk->sk_protocol != IPPROTO_TCP) 1371da177e4SLinus Torvalds break; 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) { 1401da177e4SLinus Torvalds retv = -ENOTCONN; 1411da177e4SLinus Torvalds break; 1421da177e4SLinus Torvalds } 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds if (ipv6_only_sock(sk) || 1451da177e4SLinus Torvalds !(ipv6_addr_type(&np->daddr) & IPV6_ADDR_MAPPED)) { 1461da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 1471da177e4SLinus Torvalds break; 1481da177e4SLinus Torvalds } 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds fl6_free_socklist(sk); 1511da177e4SLinus Torvalds ipv6_sock_mc_close(sk); 1521da177e4SLinus Torvalds 153e6848976SArnaldo Carvalho de Melo /* 154e6848976SArnaldo Carvalho de Melo * Sock is moving from IPv6 to IPv4 (sk_prot), so 155e6848976SArnaldo Carvalho de Melo * remove it from the refcnt debug socks count in the 156e6848976SArnaldo Carvalho de Melo * original family... 157e6848976SArnaldo Carvalho de Melo */ 158e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_dec(sk); 159e6848976SArnaldo Carvalho de Melo 1601da177e4SLinus Torvalds if (sk->sk_protocol == IPPROTO_TCP) { 161d83d8461SArnaldo Carvalho de Melo struct inet_connection_sock *icsk = inet_csk(sk); 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds local_bh_disable(); 1641da177e4SLinus Torvalds sock_prot_dec_use(sk->sk_prot); 1651da177e4SLinus Torvalds sock_prot_inc_use(&tcp_prot); 1661da177e4SLinus Torvalds local_bh_enable(); 1671da177e4SLinus Torvalds sk->sk_prot = &tcp_prot; 168d83d8461SArnaldo Carvalho de Melo icsk->icsk_af_ops = &ipv4_specific; 1691da177e4SLinus Torvalds sk->sk_socket->ops = &inet_stream_ops; 1701da177e4SLinus Torvalds sk->sk_family = PF_INET; 171d83d8461SArnaldo Carvalho de Melo tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); 1721da177e4SLinus Torvalds } else { 1731da177e4SLinus Torvalds local_bh_disable(); 1741da177e4SLinus Torvalds sock_prot_dec_use(sk->sk_prot); 1751da177e4SLinus Torvalds sock_prot_inc_use(&udp_prot); 1761da177e4SLinus Torvalds local_bh_enable(); 1771da177e4SLinus Torvalds sk->sk_prot = &udp_prot; 1781da177e4SLinus Torvalds sk->sk_socket->ops = &inet_dgram_ops; 1791da177e4SLinus Torvalds sk->sk_family = PF_INET; 1801da177e4SLinus Torvalds } 1811da177e4SLinus Torvalds opt = xchg(&np->opt, NULL); 1821da177e4SLinus Torvalds if (opt) 1831da177e4SLinus Torvalds sock_kfree_s(sk, opt, opt->tot_len); 1841da177e4SLinus Torvalds pktopt = xchg(&np->pktoptions, NULL); 1851da177e4SLinus Torvalds if (pktopt) 1861da177e4SLinus Torvalds kfree_skb(pktopt); 1871da177e4SLinus Torvalds 1881da177e4SLinus Torvalds sk->sk_destruct = inet_sock_destruct; 189e6848976SArnaldo Carvalho de Melo /* 190e6848976SArnaldo Carvalho de Melo * ... and add it to the refcnt debug socks count 191e6848976SArnaldo Carvalho de Melo * in the new family. -acme 192e6848976SArnaldo Carvalho de Melo */ 193e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_inc(sk); 1941da177e4SLinus Torvalds module_put(THIS_MODULE); 1951da177e4SLinus Torvalds retv = 0; 1961da177e4SLinus Torvalds break; 1971da177e4SLinus Torvalds } 1981da177e4SLinus Torvalds goto e_inval; 1991da177e4SLinus Torvalds 2001da177e4SLinus Torvalds case IPV6_V6ONLY: 2011da177e4SLinus Torvalds if (inet_sk(sk)->num) 2021da177e4SLinus Torvalds goto e_inval; 2031da177e4SLinus Torvalds np->ipv6only = valbool; 2041da177e4SLinus Torvalds retv = 0; 2051da177e4SLinus Torvalds break; 2061da177e4SLinus Torvalds 207333fad53SYOSHIFUJI Hideaki case IPV6_RECVPKTINFO: 2081da177e4SLinus Torvalds np->rxopt.bits.rxinfo = valbool; 2091da177e4SLinus Torvalds retv = 0; 2101da177e4SLinus Torvalds break; 2111da177e4SLinus Torvalds 212333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 213333fad53SYOSHIFUJI Hideaki np->rxopt.bits.rxoinfo = valbool; 214333fad53SYOSHIFUJI Hideaki retv = 0; 215333fad53SYOSHIFUJI Hideaki break; 216333fad53SYOSHIFUJI Hideaki 217333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPLIMIT: 2181da177e4SLinus Torvalds np->rxopt.bits.rxhlim = valbool; 2191da177e4SLinus Torvalds retv = 0; 2201da177e4SLinus Torvalds break; 2211da177e4SLinus Torvalds 222333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 223333fad53SYOSHIFUJI Hideaki np->rxopt.bits.rxohlim = valbool; 224333fad53SYOSHIFUJI Hideaki retv = 0; 225333fad53SYOSHIFUJI Hideaki break; 226333fad53SYOSHIFUJI Hideaki 227333fad53SYOSHIFUJI Hideaki case IPV6_RECVRTHDR: 2281da177e4SLinus Torvalds if (val < 0 || val > 2) 2291da177e4SLinus Torvalds goto e_inval; 2301da177e4SLinus Torvalds np->rxopt.bits.srcrt = val; 2311da177e4SLinus Torvalds retv = 0; 2321da177e4SLinus Torvalds break; 2331da177e4SLinus Torvalds 234333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 235333fad53SYOSHIFUJI Hideaki if (val < 0 || val > 2) 236333fad53SYOSHIFUJI Hideaki goto e_inval; 237333fad53SYOSHIFUJI Hideaki np->rxopt.bits.osrcrt = val; 238333fad53SYOSHIFUJI Hideaki retv = 0; 239333fad53SYOSHIFUJI Hideaki break; 240333fad53SYOSHIFUJI Hideaki 241333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPOPTS: 2421da177e4SLinus Torvalds np->rxopt.bits.hopopts = valbool; 2431da177e4SLinus Torvalds retv = 0; 2441da177e4SLinus Torvalds break; 2451da177e4SLinus Torvalds 246333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 247333fad53SYOSHIFUJI Hideaki np->rxopt.bits.ohopopts = valbool; 248333fad53SYOSHIFUJI Hideaki retv = 0; 249333fad53SYOSHIFUJI Hideaki break; 250333fad53SYOSHIFUJI Hideaki 251333fad53SYOSHIFUJI Hideaki case IPV6_RECVDSTOPTS: 2521da177e4SLinus Torvalds np->rxopt.bits.dstopts = valbool; 2531da177e4SLinus Torvalds retv = 0; 2541da177e4SLinus Torvalds break; 2551da177e4SLinus Torvalds 256333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 257333fad53SYOSHIFUJI Hideaki np->rxopt.bits.odstopts = valbool; 258333fad53SYOSHIFUJI Hideaki retv = 0; 259333fad53SYOSHIFUJI Hideaki break; 260333fad53SYOSHIFUJI Hideaki 26141a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 26241a1f8eaSYOSHIFUJI Hideaki if (val < 0 || val > 0xff) 26341a1f8eaSYOSHIFUJI Hideaki goto e_inval; 26441a1f8eaSYOSHIFUJI Hideaki np->tclass = val; 26541a1f8eaSYOSHIFUJI Hideaki retv = 0; 26641a1f8eaSYOSHIFUJI Hideaki break; 26741a1f8eaSYOSHIFUJI Hideaki 26841a1f8eaSYOSHIFUJI Hideaki case IPV6_RECVTCLASS: 26941a1f8eaSYOSHIFUJI Hideaki np->rxopt.bits.rxtclass = valbool; 27041a1f8eaSYOSHIFUJI Hideaki retv = 0; 27141a1f8eaSYOSHIFUJI Hideaki break; 27241a1f8eaSYOSHIFUJI Hideaki 2731da177e4SLinus Torvalds case IPV6_FLOWINFO: 2741da177e4SLinus Torvalds np->rxopt.bits.rxflow = valbool; 2751da177e4SLinus Torvalds retv = 0; 2761da177e4SLinus Torvalds break; 2771da177e4SLinus Torvalds 278333fad53SYOSHIFUJI Hideaki case IPV6_HOPOPTS: 279333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 280333fad53SYOSHIFUJI Hideaki case IPV6_RTHDR: 281333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 282333fad53SYOSHIFUJI Hideaki { 283333fad53SYOSHIFUJI Hideaki struct ipv6_txoptions *opt; 284333fad53SYOSHIFUJI Hideaki if (optlen == 0) 285cb422c46SLuiz Capitulino optval = NULL; 286333fad53SYOSHIFUJI Hideaki 287333fad53SYOSHIFUJI Hideaki /* hop-by-hop / destination options are privileged option */ 288333fad53SYOSHIFUJI Hideaki retv = -EPERM; 289333fad53SYOSHIFUJI Hideaki if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW)) 290333fad53SYOSHIFUJI Hideaki break; 291333fad53SYOSHIFUJI Hideaki 292333fad53SYOSHIFUJI Hideaki retv = -EINVAL; 293333fad53SYOSHIFUJI Hideaki if (optlen & 0x7 || optlen > 8 * 255) 294333fad53SYOSHIFUJI Hideaki break; 295333fad53SYOSHIFUJI Hideaki 296333fad53SYOSHIFUJI Hideaki opt = ipv6_renew_options(sk, np->opt, optname, 297333fad53SYOSHIFUJI Hideaki (struct ipv6_opt_hdr __user *)optval, 298333fad53SYOSHIFUJI Hideaki optlen); 299333fad53SYOSHIFUJI Hideaki if (IS_ERR(opt)) { 300333fad53SYOSHIFUJI Hideaki retv = PTR_ERR(opt); 301333fad53SYOSHIFUJI Hideaki break; 302333fad53SYOSHIFUJI Hideaki } 303333fad53SYOSHIFUJI Hideaki 304333fad53SYOSHIFUJI Hideaki /* routing header option needs extra check */ 305333fad53SYOSHIFUJI Hideaki if (optname == IPV6_RTHDR && opt->srcrt) { 306333fad53SYOSHIFUJI Hideaki struct ipv6_rt_hdr *rthdr = opt->srcrt; 307333fad53SYOSHIFUJI Hideaki if (rthdr->type) 308333fad53SYOSHIFUJI Hideaki goto sticky_done; 309333fad53SYOSHIFUJI Hideaki if ((rthdr->hdrlen & 1) || 310333fad53SYOSHIFUJI Hideaki (rthdr->hdrlen >> 1) != rthdr->segments_left) 311333fad53SYOSHIFUJI Hideaki goto sticky_done; 312333fad53SYOSHIFUJI Hideaki } 313333fad53SYOSHIFUJI Hideaki 314333fad53SYOSHIFUJI Hideaki retv = 0; 315d83d8461SArnaldo Carvalho de Melo if (inet_sk(sk)->is_icsk) { 316333fad53SYOSHIFUJI Hideaki if (opt) { 317d83d8461SArnaldo Carvalho de Melo struct inet_connection_sock *icsk = inet_csk(sk); 318333fad53SYOSHIFUJI Hideaki if (!((1 << sk->sk_state) & 319333fad53SYOSHIFUJI Hideaki (TCPF_LISTEN | TCPF_CLOSE)) 320333fad53SYOSHIFUJI Hideaki && inet_sk(sk)->daddr != LOOPBACK4_IPV6) { 321d83d8461SArnaldo Carvalho de Melo icsk->icsk_ext_hdr_len = 322d83d8461SArnaldo Carvalho de Melo opt->opt_flen + opt->opt_nflen; 323d83d8461SArnaldo Carvalho de Melo icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); 324333fad53SYOSHIFUJI Hideaki } 325333fad53SYOSHIFUJI Hideaki } 326333fad53SYOSHIFUJI Hideaki opt = xchg(&np->opt, opt); 327333fad53SYOSHIFUJI Hideaki sk_dst_reset(sk); 328333fad53SYOSHIFUJI Hideaki } else { 329333fad53SYOSHIFUJI Hideaki write_lock(&sk->sk_dst_lock); 330333fad53SYOSHIFUJI Hideaki opt = xchg(&np->opt, opt); 331333fad53SYOSHIFUJI Hideaki write_unlock(&sk->sk_dst_lock); 332333fad53SYOSHIFUJI Hideaki sk_dst_reset(sk); 333333fad53SYOSHIFUJI Hideaki } 334333fad53SYOSHIFUJI Hideaki sticky_done: 335333fad53SYOSHIFUJI Hideaki if (opt) 336333fad53SYOSHIFUJI Hideaki sock_kfree_s(sk, opt, opt->tot_len); 337333fad53SYOSHIFUJI Hideaki break; 338333fad53SYOSHIFUJI Hideaki } 339333fad53SYOSHIFUJI Hideaki 340333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTOPTIONS: 3411da177e4SLinus Torvalds { 3421da177e4SLinus Torvalds struct ipv6_txoptions *opt = NULL; 3431da177e4SLinus Torvalds struct msghdr msg; 3441da177e4SLinus Torvalds struct flowi fl; 3451da177e4SLinus Torvalds int junk; 3461da177e4SLinus Torvalds 3471da177e4SLinus Torvalds fl.fl6_flowlabel = 0; 3481da177e4SLinus Torvalds fl.oif = sk->sk_bound_dev_if; 3491da177e4SLinus Torvalds 3501da177e4SLinus Torvalds if (optlen == 0) 3511da177e4SLinus Torvalds goto update; 3521da177e4SLinus Torvalds 3531da177e4SLinus Torvalds /* 1K is probably excessive 3541da177e4SLinus Torvalds * 1K is surely not enough, 2K per standard header is 16K. 3551da177e4SLinus Torvalds */ 3561da177e4SLinus Torvalds retv = -EINVAL; 3571da177e4SLinus Torvalds if (optlen > 64*1024) 3581da177e4SLinus Torvalds break; 3591da177e4SLinus Torvalds 3601da177e4SLinus Torvalds opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); 3611da177e4SLinus Torvalds retv = -ENOBUFS; 3621da177e4SLinus Torvalds if (opt == NULL) 3631da177e4SLinus Torvalds break; 3641da177e4SLinus Torvalds 3651da177e4SLinus Torvalds memset(opt, 0, sizeof(*opt)); 3661da177e4SLinus Torvalds opt->tot_len = sizeof(*opt) + optlen; 3671da177e4SLinus Torvalds retv = -EFAULT; 3681da177e4SLinus Torvalds if (copy_from_user(opt+1, optval, optlen)) 3691da177e4SLinus Torvalds goto done; 3701da177e4SLinus Torvalds 3711da177e4SLinus Torvalds msg.msg_controllen = optlen; 3721da177e4SLinus Torvalds msg.msg_control = (void*)(opt+1); 3731da177e4SLinus Torvalds 37441a1f8eaSYOSHIFUJI Hideaki retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk); 3751da177e4SLinus Torvalds if (retv) 3761da177e4SLinus Torvalds goto done; 3771da177e4SLinus Torvalds update: 3781da177e4SLinus Torvalds retv = 0; 379d83d8461SArnaldo Carvalho de Melo if (inet_sk(sk)->is_icsk) { 3801da177e4SLinus Torvalds if (opt) { 381d83d8461SArnaldo Carvalho de Melo struct inet_connection_sock *icsk = inet_csk(sk); 3821da177e4SLinus Torvalds if (!((1 << sk->sk_state) & 3831da177e4SLinus Torvalds (TCPF_LISTEN | TCPF_CLOSE)) 3841da177e4SLinus Torvalds && inet_sk(sk)->daddr != LOOPBACK4_IPV6) { 385d83d8461SArnaldo Carvalho de Melo icsk->icsk_ext_hdr_len = 386d83d8461SArnaldo Carvalho de Melo opt->opt_flen + opt->opt_nflen; 387d83d8461SArnaldo Carvalho de Melo icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); 3881da177e4SLinus Torvalds } 3891da177e4SLinus Torvalds } 3901da177e4SLinus Torvalds opt = xchg(&np->opt, opt); 3911da177e4SLinus Torvalds sk_dst_reset(sk); 3921da177e4SLinus Torvalds } else { 3931da177e4SLinus Torvalds write_lock(&sk->sk_dst_lock); 3941da177e4SLinus Torvalds opt = xchg(&np->opt, opt); 3951da177e4SLinus Torvalds write_unlock(&sk->sk_dst_lock); 3961da177e4SLinus Torvalds sk_dst_reset(sk); 3971da177e4SLinus Torvalds } 3981da177e4SLinus Torvalds 3991da177e4SLinus Torvalds done: 4001da177e4SLinus Torvalds if (opt) 4011da177e4SLinus Torvalds sock_kfree_s(sk, opt, opt->tot_len); 4021da177e4SLinus Torvalds break; 4031da177e4SLinus Torvalds } 4041da177e4SLinus Torvalds case IPV6_UNICAST_HOPS: 4051da177e4SLinus Torvalds if (val > 255 || val < -1) 4061da177e4SLinus Torvalds goto e_inval; 4071da177e4SLinus Torvalds np->hop_limit = val; 4081da177e4SLinus Torvalds retv = 0; 4091da177e4SLinus Torvalds break; 4101da177e4SLinus Torvalds 4111da177e4SLinus Torvalds case IPV6_MULTICAST_HOPS: 4121da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM) 4131da177e4SLinus Torvalds goto e_inval; 4141da177e4SLinus Torvalds if (val > 255 || val < -1) 4151da177e4SLinus Torvalds goto e_inval; 4161da177e4SLinus Torvalds np->mcast_hops = val; 4171da177e4SLinus Torvalds retv = 0; 4181da177e4SLinus Torvalds break; 4191da177e4SLinus Torvalds 4201da177e4SLinus Torvalds case IPV6_MULTICAST_LOOP: 4211da177e4SLinus Torvalds np->mc_loop = valbool; 4221da177e4SLinus Torvalds retv = 0; 4231da177e4SLinus Torvalds break; 4241da177e4SLinus Torvalds 4251da177e4SLinus Torvalds case IPV6_MULTICAST_IF: 4261da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM) 4271da177e4SLinus Torvalds goto e_inval; 4281da177e4SLinus Torvalds if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) 4291da177e4SLinus Torvalds goto e_inval; 4301da177e4SLinus Torvalds 4311da177e4SLinus Torvalds if (__dev_get_by_index(val) == NULL) { 4321da177e4SLinus Torvalds retv = -ENODEV; 4331da177e4SLinus Torvalds break; 4341da177e4SLinus Torvalds } 4351da177e4SLinus Torvalds np->mcast_oif = val; 4361da177e4SLinus Torvalds retv = 0; 4371da177e4SLinus Torvalds break; 4381da177e4SLinus Torvalds case IPV6_ADD_MEMBERSHIP: 4391da177e4SLinus Torvalds case IPV6_DROP_MEMBERSHIP: 4401da177e4SLinus Torvalds { 4411da177e4SLinus Torvalds struct ipv6_mreq mreq; 4421da177e4SLinus Torvalds 4431da177e4SLinus Torvalds retv = -EFAULT; 4441da177e4SLinus Torvalds if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) 4451da177e4SLinus Torvalds break; 4461da177e4SLinus Torvalds 4471da177e4SLinus Torvalds if (optname == IPV6_ADD_MEMBERSHIP) 4481da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); 4491da177e4SLinus Torvalds else 4501da177e4SLinus Torvalds retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); 4511da177e4SLinus Torvalds break; 4521da177e4SLinus Torvalds } 4531da177e4SLinus Torvalds case IPV6_JOIN_ANYCAST: 4541da177e4SLinus Torvalds case IPV6_LEAVE_ANYCAST: 4551da177e4SLinus Torvalds { 4561da177e4SLinus Torvalds struct ipv6_mreq mreq; 4571da177e4SLinus Torvalds 4581da177e4SLinus Torvalds if (optlen != sizeof(struct ipv6_mreq)) 4591da177e4SLinus Torvalds goto e_inval; 4601da177e4SLinus Torvalds 4611da177e4SLinus Torvalds retv = -EFAULT; 4621da177e4SLinus Torvalds if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) 4631da177e4SLinus Torvalds break; 4641da177e4SLinus Torvalds 4651da177e4SLinus Torvalds if (optname == IPV6_JOIN_ANYCAST) 4661da177e4SLinus Torvalds retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); 4671da177e4SLinus Torvalds else 4681da177e4SLinus Torvalds retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); 4691da177e4SLinus Torvalds break; 4701da177e4SLinus Torvalds } 4711da177e4SLinus Torvalds case MCAST_JOIN_GROUP: 4721da177e4SLinus Torvalds case MCAST_LEAVE_GROUP: 4731da177e4SLinus Torvalds { 4741da177e4SLinus Torvalds struct group_req greq; 4751da177e4SLinus Torvalds struct sockaddr_in6 *psin6; 4761da177e4SLinus Torvalds 4771da177e4SLinus Torvalds retv = -EFAULT; 4781da177e4SLinus Torvalds if (copy_from_user(&greq, optval, sizeof(struct group_req))) 4791da177e4SLinus Torvalds break; 4801da177e4SLinus Torvalds if (greq.gr_group.ss_family != AF_INET6) { 4811da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 4821da177e4SLinus Torvalds break; 4831da177e4SLinus Torvalds } 4841da177e4SLinus Torvalds psin6 = (struct sockaddr_in6 *)&greq.gr_group; 4851da177e4SLinus Torvalds if (optname == MCAST_JOIN_GROUP) 4861da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, greq.gr_interface, 4871da177e4SLinus Torvalds &psin6->sin6_addr); 4881da177e4SLinus Torvalds else 4891da177e4SLinus Torvalds retv = ipv6_sock_mc_drop(sk, greq.gr_interface, 4901da177e4SLinus Torvalds &psin6->sin6_addr); 4911da177e4SLinus Torvalds break; 4921da177e4SLinus Torvalds } 4931da177e4SLinus Torvalds case MCAST_JOIN_SOURCE_GROUP: 4941da177e4SLinus Torvalds case MCAST_LEAVE_SOURCE_GROUP: 4951da177e4SLinus Torvalds case MCAST_BLOCK_SOURCE: 4961da177e4SLinus Torvalds case MCAST_UNBLOCK_SOURCE: 4971da177e4SLinus Torvalds { 4981da177e4SLinus Torvalds struct group_source_req greqs; 4991da177e4SLinus Torvalds int omode, add; 5001da177e4SLinus Torvalds 5011da177e4SLinus Torvalds if (optlen != sizeof(struct group_source_req)) 5021da177e4SLinus Torvalds goto e_inval; 5031da177e4SLinus Torvalds if (copy_from_user(&greqs, optval, sizeof(greqs))) { 5041da177e4SLinus Torvalds retv = -EFAULT; 5051da177e4SLinus Torvalds break; 5061da177e4SLinus Torvalds } 5071da177e4SLinus Torvalds if (greqs.gsr_group.ss_family != AF_INET6 || 5081da177e4SLinus Torvalds greqs.gsr_source.ss_family != AF_INET6) { 5091da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 5101da177e4SLinus Torvalds break; 5111da177e4SLinus Torvalds } 5121da177e4SLinus Torvalds if (optname == MCAST_BLOCK_SOURCE) { 5131da177e4SLinus Torvalds omode = MCAST_EXCLUDE; 5141da177e4SLinus Torvalds add = 1; 5151da177e4SLinus Torvalds } else if (optname == MCAST_UNBLOCK_SOURCE) { 5161da177e4SLinus Torvalds omode = MCAST_EXCLUDE; 5171da177e4SLinus Torvalds add = 0; 5181da177e4SLinus Torvalds } else if (optname == MCAST_JOIN_SOURCE_GROUP) { 5191da177e4SLinus Torvalds struct sockaddr_in6 *psin6; 5201da177e4SLinus Torvalds 5211da177e4SLinus Torvalds psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; 5221da177e4SLinus Torvalds retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, 5231da177e4SLinus Torvalds &psin6->sin6_addr); 524c9e3e8b6SDavid L Stevens /* prior join w/ different source is ok */ 525c9e3e8b6SDavid L Stevens if (retv && retv != -EADDRINUSE) 5261da177e4SLinus Torvalds break; 5271da177e4SLinus Torvalds omode = MCAST_INCLUDE; 5281da177e4SLinus Torvalds add = 1; 529c9e3e8b6SDavid L Stevens } else /* MCAST_LEAVE_SOURCE_GROUP */ { 5301da177e4SLinus Torvalds omode = MCAST_INCLUDE; 5311da177e4SLinus Torvalds add = 0; 5321da177e4SLinus Torvalds } 5331da177e4SLinus Torvalds retv = ip6_mc_source(add, omode, sk, &greqs); 5341da177e4SLinus Torvalds break; 5351da177e4SLinus Torvalds } 5361da177e4SLinus Torvalds case MCAST_MSFILTER: 5371da177e4SLinus Torvalds { 5381da177e4SLinus Torvalds extern int sysctl_mld_max_msf; 5391da177e4SLinus Torvalds struct group_filter *gsf; 5401da177e4SLinus Torvalds 5411da177e4SLinus Torvalds if (optlen < GROUP_FILTER_SIZE(0)) 5421da177e4SLinus Torvalds goto e_inval; 5431da177e4SLinus Torvalds if (optlen > sysctl_optmem_max) { 5441da177e4SLinus Torvalds retv = -ENOBUFS; 5451da177e4SLinus Torvalds break; 5461da177e4SLinus Torvalds } 5478b3a7005SKris Katterjohn gsf = kmalloc(optlen,GFP_KERNEL); 5481da177e4SLinus Torvalds if (gsf == 0) { 5491da177e4SLinus Torvalds retv = -ENOBUFS; 5501da177e4SLinus Torvalds break; 5511da177e4SLinus Torvalds } 5521da177e4SLinus Torvalds retv = -EFAULT; 5531da177e4SLinus Torvalds if (copy_from_user(gsf, optval, optlen)) { 5541da177e4SLinus Torvalds kfree(gsf); 5551da177e4SLinus Torvalds break; 5561da177e4SLinus Torvalds } 5571da177e4SLinus Torvalds /* numsrc >= (4G-140)/128 overflow in 32 bits */ 5581da177e4SLinus Torvalds if (gsf->gf_numsrc >= 0x1ffffffU || 5591da177e4SLinus Torvalds gsf->gf_numsrc > sysctl_mld_max_msf) { 5601da177e4SLinus Torvalds kfree(gsf); 5611da177e4SLinus Torvalds retv = -ENOBUFS; 5621da177e4SLinus Torvalds break; 5631da177e4SLinus Torvalds } 5641da177e4SLinus Torvalds if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { 5651da177e4SLinus Torvalds kfree(gsf); 5661da177e4SLinus Torvalds retv = -EINVAL; 5671da177e4SLinus Torvalds break; 5681da177e4SLinus Torvalds } 5691da177e4SLinus Torvalds retv = ip6_mc_msfilter(sk, gsf); 5701da177e4SLinus Torvalds kfree(gsf); 5711da177e4SLinus Torvalds 5721da177e4SLinus Torvalds break; 5731da177e4SLinus Torvalds } 5741da177e4SLinus Torvalds case IPV6_ROUTER_ALERT: 5751da177e4SLinus Torvalds retv = ip6_ra_control(sk, val, NULL); 5761da177e4SLinus Torvalds break; 5771da177e4SLinus Torvalds case IPV6_MTU_DISCOVER: 5781da177e4SLinus Torvalds if (val<0 || val>2) 5791da177e4SLinus Torvalds goto e_inval; 5801da177e4SLinus Torvalds np->pmtudisc = val; 5811da177e4SLinus Torvalds retv = 0; 5821da177e4SLinus Torvalds break; 5831da177e4SLinus Torvalds case IPV6_MTU: 5841da177e4SLinus Torvalds if (val && val < IPV6_MIN_MTU) 5851da177e4SLinus Torvalds goto e_inval; 5861da177e4SLinus Torvalds np->frag_size = val; 5871da177e4SLinus Torvalds retv = 0; 5881da177e4SLinus Torvalds break; 5891da177e4SLinus Torvalds case IPV6_RECVERR: 5901da177e4SLinus Torvalds np->recverr = valbool; 5911da177e4SLinus Torvalds if (!val) 5921da177e4SLinus Torvalds skb_queue_purge(&sk->sk_error_queue); 5931da177e4SLinus Torvalds retv = 0; 5941da177e4SLinus Torvalds break; 5951da177e4SLinus Torvalds case IPV6_FLOWINFO_SEND: 5961da177e4SLinus Torvalds np->sndflow = valbool; 5971da177e4SLinus Torvalds retv = 0; 5981da177e4SLinus Torvalds break; 5991da177e4SLinus Torvalds case IPV6_FLOWLABEL_MGR: 6001da177e4SLinus Torvalds retv = ipv6_flowlabel_opt(sk, optval, optlen); 6011da177e4SLinus Torvalds break; 6021da177e4SLinus Torvalds case IPV6_IPSEC_POLICY: 6031da177e4SLinus Torvalds case IPV6_XFRM_POLICY: 6046fc0b4a7SHerbert Xu retv = -EPERM; 6056fc0b4a7SHerbert Xu if (!capable(CAP_NET_ADMIN)) 6066fc0b4a7SHerbert Xu break; 6071da177e4SLinus Torvalds retv = xfrm_user_policy(sk, optname, optval, optlen); 6081da177e4SLinus Torvalds break; 6091da177e4SLinus Torvalds 6101da177e4SLinus Torvalds } 6111da177e4SLinus Torvalds release_sock(sk); 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds return retv; 6141da177e4SLinus Torvalds 6151da177e4SLinus Torvalds e_inval: 6161da177e4SLinus Torvalds release_sock(sk); 6171da177e4SLinus Torvalds return -EINVAL; 6181da177e4SLinus Torvalds } 6191da177e4SLinus Torvalds 6203fdadf7dSDmitry Mishin int ipv6_setsockopt(struct sock *sk, int level, int optname, 6213fdadf7dSDmitry Mishin char __user *optval, int optlen) 6223fdadf7dSDmitry Mishin { 6233fdadf7dSDmitry Mishin int err; 6243fdadf7dSDmitry Mishin 6253fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) 6263fdadf7dSDmitry Mishin return udp_prot.setsockopt(sk, level, optname, optval, optlen); 6273fdadf7dSDmitry Mishin 6283fdadf7dSDmitry Mishin if (level != SOL_IPV6) 6293fdadf7dSDmitry Mishin return -ENOPROTOOPT; 6303fdadf7dSDmitry Mishin 6313fdadf7dSDmitry Mishin err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); 6323fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 6333fdadf7dSDmitry Mishin /* we need to exclude all possible ENOPROTOOPTs except default case */ 6343fdadf7dSDmitry Mishin if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && 6353fdadf7dSDmitry Mishin optname != IPV6_XFRM_POLICY) { 6363fdadf7dSDmitry Mishin lock_sock(sk); 6373fdadf7dSDmitry Mishin err = nf_setsockopt(sk, PF_INET6, optname, optval, 6383fdadf7dSDmitry Mishin optlen); 6393fdadf7dSDmitry Mishin release_sock(sk); 6403fdadf7dSDmitry Mishin } 6413fdadf7dSDmitry Mishin #endif 6423fdadf7dSDmitry Mishin return err; 6433fdadf7dSDmitry Mishin } 6443fdadf7dSDmitry Mishin 6453fdadf7dSDmitry Mishin 6463fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 6473fdadf7dSDmitry Mishin int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, 6483fdadf7dSDmitry Mishin char __user *optval, int optlen) 6493fdadf7dSDmitry Mishin { 6503fdadf7dSDmitry Mishin int err; 6513fdadf7dSDmitry Mishin 6523fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) { 653543d9cfeSArnaldo Carvalho de Melo if (udp_prot.compat_setsockopt != NULL) 654543d9cfeSArnaldo Carvalho de Melo return udp_prot.compat_setsockopt(sk, level, optname, 655543d9cfeSArnaldo Carvalho de Melo optval, optlen); 656543d9cfeSArnaldo Carvalho de Melo return udp_prot.setsockopt(sk, level, optname, optval, optlen); 6573fdadf7dSDmitry Mishin } 6583fdadf7dSDmitry Mishin 6593fdadf7dSDmitry Mishin if (level != SOL_IPV6) 6603fdadf7dSDmitry Mishin return -ENOPROTOOPT; 6613fdadf7dSDmitry Mishin 6623fdadf7dSDmitry Mishin err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); 6633fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 6643fdadf7dSDmitry Mishin /* we need to exclude all possible ENOPROTOOPTs except default case */ 6653fdadf7dSDmitry Mishin if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && 6663fdadf7dSDmitry Mishin optname != IPV6_XFRM_POLICY) { 6673fdadf7dSDmitry Mishin lock_sock(sk); 668543d9cfeSArnaldo Carvalho de Melo err = compat_nf_setsockopt(sk, PF_INET6, optname, 669543d9cfeSArnaldo Carvalho de Melo optval, optlen); 6703fdadf7dSDmitry Mishin release_sock(sk); 6713fdadf7dSDmitry Mishin } 6723fdadf7dSDmitry Mishin #endif 6733fdadf7dSDmitry Mishin return err; 6743fdadf7dSDmitry Mishin } 675543d9cfeSArnaldo Carvalho de Melo 676543d9cfeSArnaldo Carvalho de Melo EXPORT_SYMBOL(compat_ipv6_setsockopt); 6773fdadf7dSDmitry Mishin #endif 6783fdadf7dSDmitry Mishin 67934a0b3cdSAdrian Bunk static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_opt_hdr *hdr, 680333fad53SYOSHIFUJI Hideaki char __user *optval, int len) 681333fad53SYOSHIFUJI Hideaki { 682333fad53SYOSHIFUJI Hideaki if (!hdr) 683333fad53SYOSHIFUJI Hideaki return 0; 684333fad53SYOSHIFUJI Hideaki len = min_t(int, len, ipv6_optlen(hdr)); 685333fad53SYOSHIFUJI Hideaki if (copy_to_user(optval, hdr, ipv6_optlen(hdr))) 686333fad53SYOSHIFUJI Hideaki return -EFAULT; 687333fad53SYOSHIFUJI Hideaki return len; 688333fad53SYOSHIFUJI Hideaki } 689333fad53SYOSHIFUJI Hideaki 6903fdadf7dSDmitry Mishin static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, 6911da177e4SLinus Torvalds char __user *optval, int __user *optlen) 6921da177e4SLinus Torvalds { 6931da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 6941da177e4SLinus Torvalds int len; 6951da177e4SLinus Torvalds int val; 6961da177e4SLinus Torvalds 6971da177e4SLinus Torvalds if (get_user(len, optlen)) 6981da177e4SLinus Torvalds return -EFAULT; 6991da177e4SLinus Torvalds switch (optname) { 7001da177e4SLinus Torvalds case IPV6_ADDRFORM: 7011da177e4SLinus Torvalds if (sk->sk_protocol != IPPROTO_UDP && 7021da177e4SLinus Torvalds sk->sk_protocol != IPPROTO_TCP) 7031da177e4SLinus Torvalds return -EINVAL; 7041da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) 7051da177e4SLinus Torvalds return -ENOTCONN; 7061da177e4SLinus Torvalds val = sk->sk_family; 7071da177e4SLinus Torvalds break; 7081da177e4SLinus Torvalds case MCAST_MSFILTER: 7091da177e4SLinus Torvalds { 7101da177e4SLinus Torvalds struct group_filter gsf; 7111da177e4SLinus Torvalds int err; 7121da177e4SLinus Torvalds 7131da177e4SLinus Torvalds if (len < GROUP_FILTER_SIZE(0)) 7141da177e4SLinus Torvalds return -EINVAL; 7151da177e4SLinus Torvalds if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) 7161da177e4SLinus Torvalds return -EFAULT; 7171da177e4SLinus Torvalds lock_sock(sk); 7181da177e4SLinus Torvalds err = ip6_mc_msfget(sk, &gsf, 7191da177e4SLinus Torvalds (struct group_filter __user *)optval, optlen); 7201da177e4SLinus Torvalds release_sock(sk); 7211da177e4SLinus Torvalds return err; 7221da177e4SLinus Torvalds } 7231da177e4SLinus Torvalds 724333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTOPTIONS: 7251da177e4SLinus Torvalds { 7261da177e4SLinus Torvalds struct msghdr msg; 7271da177e4SLinus Torvalds struct sk_buff *skb; 7281da177e4SLinus Torvalds 7291da177e4SLinus Torvalds if (sk->sk_type != SOCK_STREAM) 7301da177e4SLinus Torvalds return -ENOPROTOOPT; 7311da177e4SLinus Torvalds 7321da177e4SLinus Torvalds msg.msg_control = optval; 7331da177e4SLinus Torvalds msg.msg_controllen = len; 7341da177e4SLinus Torvalds msg.msg_flags = 0; 7351da177e4SLinus Torvalds 7361da177e4SLinus Torvalds lock_sock(sk); 7371da177e4SLinus Torvalds skb = np->pktoptions; 7381da177e4SLinus Torvalds if (skb) 7391da177e4SLinus Torvalds atomic_inc(&skb->users); 7401da177e4SLinus Torvalds release_sock(sk); 7411da177e4SLinus Torvalds 7421da177e4SLinus Torvalds if (skb) { 7431da177e4SLinus Torvalds int err = datagram_recv_ctl(sk, &msg, skb); 7441da177e4SLinus Torvalds kfree_skb(skb); 7451da177e4SLinus Torvalds if (err) 7461da177e4SLinus Torvalds return err; 7471da177e4SLinus Torvalds } else { 7481da177e4SLinus Torvalds if (np->rxopt.bits.rxinfo) { 7491da177e4SLinus Torvalds struct in6_pktinfo src_info; 7501da177e4SLinus Torvalds src_info.ipi6_ifindex = np->mcast_oif; 7511da177e4SLinus Torvalds ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); 7521da177e4SLinus Torvalds put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); 7531da177e4SLinus Torvalds } 7541da177e4SLinus Torvalds if (np->rxopt.bits.rxhlim) { 7551da177e4SLinus Torvalds int hlim = np->mcast_hops; 7561da177e4SLinus Torvalds put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); 7571da177e4SLinus Torvalds } 758333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxoinfo) { 759333fad53SYOSHIFUJI Hideaki struct in6_pktinfo src_info; 760333fad53SYOSHIFUJI Hideaki src_info.ipi6_ifindex = np->mcast_oif; 761333fad53SYOSHIFUJI Hideaki ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); 762333fad53SYOSHIFUJI Hideaki put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); 763333fad53SYOSHIFUJI Hideaki } 764333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxohlim) { 765333fad53SYOSHIFUJI Hideaki int hlim = np->mcast_hops; 766333fad53SYOSHIFUJI Hideaki put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); 767333fad53SYOSHIFUJI Hideaki } 7681da177e4SLinus Torvalds } 7691da177e4SLinus Torvalds len -= msg.msg_controllen; 7701da177e4SLinus Torvalds return put_user(len, optlen); 7711da177e4SLinus Torvalds } 7721da177e4SLinus Torvalds case IPV6_MTU: 7731da177e4SLinus Torvalds { 7741da177e4SLinus Torvalds struct dst_entry *dst; 7751da177e4SLinus Torvalds val = 0; 7761da177e4SLinus Torvalds lock_sock(sk); 7771da177e4SLinus Torvalds dst = sk_dst_get(sk); 7781da177e4SLinus Torvalds if (dst) { 7791da177e4SLinus Torvalds val = dst_mtu(dst); 7801da177e4SLinus Torvalds dst_release(dst); 7811da177e4SLinus Torvalds } 7821da177e4SLinus Torvalds release_sock(sk); 7831da177e4SLinus Torvalds if (!val) 7841da177e4SLinus Torvalds return -ENOTCONN; 7851da177e4SLinus Torvalds break; 7861da177e4SLinus Torvalds } 7871da177e4SLinus Torvalds 7881da177e4SLinus Torvalds case IPV6_V6ONLY: 7891da177e4SLinus Torvalds val = np->ipv6only; 7901da177e4SLinus Torvalds break; 7911da177e4SLinus Torvalds 792333fad53SYOSHIFUJI Hideaki case IPV6_RECVPKTINFO: 7931da177e4SLinus Torvalds val = np->rxopt.bits.rxinfo; 7941da177e4SLinus Torvalds break; 7951da177e4SLinus Torvalds 796333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 797333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.rxoinfo; 798333fad53SYOSHIFUJI Hideaki break; 799333fad53SYOSHIFUJI Hideaki 800333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPLIMIT: 8011da177e4SLinus Torvalds val = np->rxopt.bits.rxhlim; 8021da177e4SLinus Torvalds break; 8031da177e4SLinus Torvalds 804333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 805333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.rxohlim; 806333fad53SYOSHIFUJI Hideaki break; 807333fad53SYOSHIFUJI Hideaki 808333fad53SYOSHIFUJI Hideaki case IPV6_RECVRTHDR: 8091da177e4SLinus Torvalds val = np->rxopt.bits.srcrt; 8101da177e4SLinus Torvalds break; 8111da177e4SLinus Torvalds 812333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 813333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.osrcrt; 814333fad53SYOSHIFUJI Hideaki break; 815333fad53SYOSHIFUJI Hideaki 8161da177e4SLinus Torvalds case IPV6_HOPOPTS: 817333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 818333fad53SYOSHIFUJI Hideaki case IPV6_RTHDR: 819333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 820333fad53SYOSHIFUJI Hideaki { 821333fad53SYOSHIFUJI Hideaki 822333fad53SYOSHIFUJI Hideaki lock_sock(sk); 823333fad53SYOSHIFUJI Hideaki len = ipv6_getsockopt_sticky(sk, np->opt->hopopt, 824333fad53SYOSHIFUJI Hideaki optval, len); 825333fad53SYOSHIFUJI Hideaki release_sock(sk); 826333fad53SYOSHIFUJI Hideaki return put_user(len, optlen); 827333fad53SYOSHIFUJI Hideaki } 828333fad53SYOSHIFUJI Hideaki 829333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPOPTS: 8301da177e4SLinus Torvalds val = np->rxopt.bits.hopopts; 8311da177e4SLinus Torvalds break; 8321da177e4SLinus Torvalds 833333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 834333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.ohopopts; 835333fad53SYOSHIFUJI Hideaki break; 836333fad53SYOSHIFUJI Hideaki 837333fad53SYOSHIFUJI Hideaki case IPV6_RECVDSTOPTS: 8381da177e4SLinus Torvalds val = np->rxopt.bits.dstopts; 8391da177e4SLinus Torvalds break; 8401da177e4SLinus Torvalds 841333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 842333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.odstopts; 843333fad53SYOSHIFUJI Hideaki break; 844333fad53SYOSHIFUJI Hideaki 84541a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 84641a1f8eaSYOSHIFUJI Hideaki val = np->tclass; 84741a1f8eaSYOSHIFUJI Hideaki break; 84841a1f8eaSYOSHIFUJI Hideaki 84941a1f8eaSYOSHIFUJI Hideaki case IPV6_RECVTCLASS: 85041a1f8eaSYOSHIFUJI Hideaki val = np->rxopt.bits.rxtclass; 85141a1f8eaSYOSHIFUJI Hideaki break; 85241a1f8eaSYOSHIFUJI Hideaki 8531da177e4SLinus Torvalds case IPV6_FLOWINFO: 8541da177e4SLinus Torvalds val = np->rxopt.bits.rxflow; 8551da177e4SLinus Torvalds break; 8561da177e4SLinus Torvalds 8571da177e4SLinus Torvalds case IPV6_UNICAST_HOPS: 8581da177e4SLinus Torvalds val = np->hop_limit; 8591da177e4SLinus Torvalds break; 8601da177e4SLinus Torvalds 8611da177e4SLinus Torvalds case IPV6_MULTICAST_HOPS: 8621da177e4SLinus Torvalds val = np->mcast_hops; 8631da177e4SLinus Torvalds break; 8641da177e4SLinus Torvalds 8651da177e4SLinus Torvalds case IPV6_MULTICAST_LOOP: 8661da177e4SLinus Torvalds val = np->mc_loop; 8671da177e4SLinus Torvalds break; 8681da177e4SLinus Torvalds 8691da177e4SLinus Torvalds case IPV6_MULTICAST_IF: 8701da177e4SLinus Torvalds val = np->mcast_oif; 8711da177e4SLinus Torvalds break; 8721da177e4SLinus Torvalds 8731da177e4SLinus Torvalds case IPV6_MTU_DISCOVER: 8741da177e4SLinus Torvalds val = np->pmtudisc; 8751da177e4SLinus Torvalds break; 8761da177e4SLinus Torvalds 8771da177e4SLinus Torvalds case IPV6_RECVERR: 8781da177e4SLinus Torvalds val = np->recverr; 8791da177e4SLinus Torvalds break; 8801da177e4SLinus Torvalds 8811da177e4SLinus Torvalds case IPV6_FLOWINFO_SEND: 8821da177e4SLinus Torvalds val = np->sndflow; 8831da177e4SLinus Torvalds break; 8841da177e4SLinus Torvalds 8851da177e4SLinus Torvalds default: 8861da177e4SLinus Torvalds return -EINVAL; 8871da177e4SLinus Torvalds } 8881da177e4SLinus Torvalds len = min_t(unsigned int, sizeof(int), len); 8891da177e4SLinus Torvalds if(put_user(len, optlen)) 8901da177e4SLinus Torvalds return -EFAULT; 8911da177e4SLinus Torvalds if(copy_to_user(optval,&val,len)) 8921da177e4SLinus Torvalds return -EFAULT; 8931da177e4SLinus Torvalds return 0; 8941da177e4SLinus Torvalds } 8951da177e4SLinus Torvalds 8963fdadf7dSDmitry Mishin int ipv6_getsockopt(struct sock *sk, int level, int optname, 8973fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 8983fdadf7dSDmitry Mishin { 8993fdadf7dSDmitry Mishin int err; 9003fdadf7dSDmitry Mishin 9013fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) 9023fdadf7dSDmitry Mishin return udp_prot.getsockopt(sk, level, optname, optval, optlen); 9033fdadf7dSDmitry Mishin 9043fdadf7dSDmitry Mishin if(level != SOL_IPV6) 9053fdadf7dSDmitry Mishin return -ENOPROTOOPT; 9063fdadf7dSDmitry Mishin 9073fdadf7dSDmitry Mishin err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); 9083fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 9093fdadf7dSDmitry Mishin /* we need to exclude all possible EINVALs except default case */ 910443da0d5SPatrick McHardy if (err == -EINVAL && optname != IPV6_ADDRFORM && 9113fdadf7dSDmitry Mishin optname != MCAST_MSFILTER) { 9123fdadf7dSDmitry Mishin int len; 9133fdadf7dSDmitry Mishin 9143fdadf7dSDmitry Mishin if (get_user(len, optlen)) 9153fdadf7dSDmitry Mishin return -EFAULT; 9163fdadf7dSDmitry Mishin 9173fdadf7dSDmitry Mishin lock_sock(sk); 9183fdadf7dSDmitry Mishin err = nf_getsockopt(sk, PF_INET6, optname, optval, 9193fdadf7dSDmitry Mishin &len); 9203fdadf7dSDmitry Mishin release_sock(sk); 9213fdadf7dSDmitry Mishin if (err >= 0) 9223fdadf7dSDmitry Mishin err = put_user(len, optlen); 9233fdadf7dSDmitry Mishin } 9243fdadf7dSDmitry Mishin #endif 9253fdadf7dSDmitry Mishin return err; 9263fdadf7dSDmitry Mishin } 9273fdadf7dSDmitry Mishin 9283fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 9293fdadf7dSDmitry Mishin int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, 9303fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 9313fdadf7dSDmitry Mishin { 9323fdadf7dSDmitry Mishin int err; 9333fdadf7dSDmitry Mishin 9343fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) { 935543d9cfeSArnaldo Carvalho de Melo if (udp_prot.compat_getsockopt != NULL) 936543d9cfeSArnaldo Carvalho de Melo return udp_prot.compat_getsockopt(sk, level, optname, 937543d9cfeSArnaldo Carvalho de Melo optval, optlen); 938543d9cfeSArnaldo Carvalho de Melo return udp_prot.getsockopt(sk, level, optname, optval, optlen); 9393fdadf7dSDmitry Mishin } 9403fdadf7dSDmitry Mishin 9413fdadf7dSDmitry Mishin if (level != SOL_IPV6) 9423fdadf7dSDmitry Mishin return -ENOPROTOOPT; 9433fdadf7dSDmitry Mishin 9443fdadf7dSDmitry Mishin err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); 9453fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 9463fdadf7dSDmitry Mishin /* we need to exclude all possible EINVALs except default case */ 947443da0d5SPatrick McHardy if (err == -EINVAL && optname != IPV6_ADDRFORM && 9483fdadf7dSDmitry Mishin optname != MCAST_MSFILTER) { 9493fdadf7dSDmitry Mishin int len; 9503fdadf7dSDmitry Mishin 9513fdadf7dSDmitry Mishin if (get_user(len, optlen)) 9523fdadf7dSDmitry Mishin return -EFAULT; 9533fdadf7dSDmitry Mishin 9543fdadf7dSDmitry Mishin lock_sock(sk); 955543d9cfeSArnaldo Carvalho de Melo err = compat_nf_getsockopt(sk, PF_INET6, 956543d9cfeSArnaldo Carvalho de Melo optname, optval, &len); 9573fdadf7dSDmitry Mishin release_sock(sk); 9583fdadf7dSDmitry Mishin if (err >= 0) 9593fdadf7dSDmitry Mishin err = put_user(len, optlen); 9603fdadf7dSDmitry Mishin } 9613fdadf7dSDmitry Mishin #endif 9623fdadf7dSDmitry Mishin return err; 9633fdadf7dSDmitry Mishin } 964543d9cfeSArnaldo Carvalho de Melo 965543d9cfeSArnaldo Carvalho de Melo EXPORT_SYMBOL(compat_ipv6_getsockopt); 9663fdadf7dSDmitry Mishin #endif 9673fdadf7dSDmitry Mishin 9681da177e4SLinus Torvalds void __init ipv6_packet_init(void) 9691da177e4SLinus Torvalds { 9701da177e4SLinus Torvalds dev_add_pack(&ipv6_packet_type); 9711da177e4SLinus Torvalds } 9721da177e4SLinus Torvalds 9731da177e4SLinus Torvalds void ipv6_packet_cleanup(void) 9741da177e4SLinus Torvalds { 9751da177e4SLinus Torvalds dev_remove_pack(&ipv6_packet_type); 9761da177e4SLinus Torvalds } 977