12874c5fdSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 21da177e4SLinus Torvalds /* 31da177e4SLinus Torvalds * IPv6 BSD socket options interface 41da177e4SLinus Torvalds * Linux INET6 implementation 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Authors: 71da177e4SLinus Torvalds * Pedro Roque <roque@di.fc.ul.pt> 81da177e4SLinus Torvalds * 91da177e4SLinus Torvalds * Based on linux/net/ipv4/ip_sockglue.c 101da177e4SLinus Torvalds * 111da177e4SLinus Torvalds * FIXME: Make the setsockopt code POSIX compliant: That is 121da177e4SLinus Torvalds * 131da177e4SLinus Torvalds * o Truncate getsockopt returns 141da177e4SLinus Torvalds * o Return an optlen of the truncated length if need be 151da177e4SLinus Torvalds * 161da177e4SLinus Torvalds * Changes: 171da177e4SLinus Torvalds * David L Stevens <dlstevens@us.ibm.com>: 181da177e4SLinus Torvalds * - added multicast source filtering API for MLDv2 191da177e4SLinus Torvalds */ 201da177e4SLinus Torvalds 211da177e4SLinus Torvalds #include <linux/module.h> 224fc268d2SRandy Dunlap #include <linux/capability.h> 231da177e4SLinus Torvalds #include <linux/errno.h> 241da177e4SLinus Torvalds #include <linux/types.h> 251da177e4SLinus Torvalds #include <linux/socket.h> 261da177e4SLinus Torvalds #include <linux/sockios.h> 271da177e4SLinus Torvalds #include <linux/net.h> 281da177e4SLinus Torvalds #include <linux/in6.h> 297bc570c8SYOSHIFUJI Hideaki #include <linux/mroute6.h> 301da177e4SLinus Torvalds #include <linux/netdevice.h> 311da177e4SLinus Torvalds #include <linux/if_arp.h> 321da177e4SLinus Torvalds #include <linux/init.h> 331da177e4SLinus Torvalds #include <linux/sysctl.h> 341da177e4SLinus Torvalds #include <linux/netfilter.h> 355a0e3ad6STejun Heo #include <linux/slab.h> 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds #include <net/sock.h> 381da177e4SLinus Torvalds #include <net/snmp.h> 391da177e4SLinus Torvalds #include <net/ipv6.h> 401da177e4SLinus Torvalds #include <net/ndisc.h> 411da177e4SLinus Torvalds #include <net/protocol.h> 421da177e4SLinus Torvalds #include <net/transp_v6.h> 431da177e4SLinus Torvalds #include <net/ip6_route.h> 441da177e4SLinus Torvalds #include <net/addrconf.h> 451da177e4SLinus Torvalds #include <net/inet_common.h> 461da177e4SLinus Torvalds #include <net/tcp.h> 471da177e4SLinus Torvalds #include <net/udp.h> 48ba4e58ecSGerrit Renker #include <net/udplite.h> 491da177e4SLinus Torvalds #include <net/xfrm.h> 50dae50295SDavid L Stevens #include <net/compat.h> 51a149e7c7SDavid Lebrun #include <net/seg6.h> 521da177e4SLinus Torvalds 537c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds struct ip6_ra_chain *ip6_ra_chain; 561da177e4SLinus Torvalds DEFINE_RWLOCK(ip6_ra_lock); 571da177e4SLinus Torvalds 58790eb673SEric Dumazet DEFINE_STATIC_KEY_FALSE(ip6_min_hopcount); 59790eb673SEric Dumazet 60725a8ff0SDenis V. Lunev int ip6_ra_control(struct sock *sk, int sel) 611da177e4SLinus Torvalds { 621da177e4SLinus Torvalds struct ip6_ra_chain *ra, *new_ra, **rap; 631da177e4SLinus Torvalds 641da177e4SLinus Torvalds /* RA packet may be delivered ONLY to IPPROTO_RAW socket */ 65c720c7e8SEric Dumazet if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num != IPPROTO_RAW) 661717699cSYOSHIFUJI Hideaki return -ENOPROTOOPT; 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds new_ra = (sel >= 0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; 6995baa60aSGen Zhang if (sel >= 0 && !new_ra) 7095baa60aSGen Zhang return -ENOMEM; 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 141894cfbc0SChristoph Hellwig static int copy_group_source_from_sockptr(struct group_source_req *greqs, 142894cfbc0SChristoph Hellwig sockptr_t optval, int optlen) 143fcfa0b09SAl Viro { 1443021ad52SChristoph Hellwig if (in_compat_syscall()) { 1453021ad52SChristoph Hellwig struct compat_group_source_req gr32; 146fcfa0b09SAl Viro 1473021ad52SChristoph Hellwig if (optlen < sizeof(gr32)) 1483021ad52SChristoph Hellwig return -EINVAL; 149894cfbc0SChristoph Hellwig if (copy_from_sockptr(&gr32, optval, sizeof(gr32))) 1503021ad52SChristoph Hellwig return -EFAULT; 1513021ad52SChristoph Hellwig greqs->gsr_interface = gr32.gsr_interface; 1523021ad52SChristoph Hellwig greqs->gsr_group = gr32.gsr_group; 1533021ad52SChristoph Hellwig greqs->gsr_source = gr32.gsr_source; 1543021ad52SChristoph Hellwig } else { 1553021ad52SChristoph Hellwig if (optlen < sizeof(*greqs)) 1563021ad52SChristoph Hellwig return -EINVAL; 157894cfbc0SChristoph Hellwig if (copy_from_sockptr(greqs, optval, sizeof(*greqs))) 1583021ad52SChristoph Hellwig return -EFAULT; 1593021ad52SChristoph Hellwig } 1603021ad52SChristoph Hellwig 1613021ad52SChristoph Hellwig return 0; 1623021ad52SChristoph Hellwig } 1633021ad52SChristoph Hellwig 1643021ad52SChristoph Hellwig static int do_ipv6_mcast_group_source(struct sock *sk, int optname, 165894cfbc0SChristoph Hellwig sockptr_t optval, int optlen) 1663021ad52SChristoph Hellwig { 1673021ad52SChristoph Hellwig struct group_source_req greqs; 1683021ad52SChristoph Hellwig int omode, add; 1693021ad52SChristoph Hellwig int ret; 1703021ad52SChristoph Hellwig 171894cfbc0SChristoph Hellwig ret = copy_group_source_from_sockptr(&greqs, optval, optlen); 1723021ad52SChristoph Hellwig if (ret) 1733021ad52SChristoph Hellwig return ret; 1743021ad52SChristoph Hellwig 1753021ad52SChristoph Hellwig if (greqs.gsr_group.ss_family != AF_INET6 || 1763021ad52SChristoph Hellwig greqs.gsr_source.ss_family != AF_INET6) 177fcfa0b09SAl Viro return -EADDRNOTAVAIL; 178fcfa0b09SAl Viro 179fcfa0b09SAl Viro if (optname == MCAST_BLOCK_SOURCE) { 180fcfa0b09SAl Viro omode = MCAST_EXCLUDE; 181fcfa0b09SAl Viro add = 1; 182fcfa0b09SAl Viro } else if (optname == MCAST_UNBLOCK_SOURCE) { 183fcfa0b09SAl Viro omode = MCAST_EXCLUDE; 184fcfa0b09SAl Viro add = 0; 185fcfa0b09SAl Viro } else if (optname == MCAST_JOIN_SOURCE_GROUP) { 186fcfa0b09SAl Viro struct sockaddr_in6 *psin6; 187fcfa0b09SAl Viro int retv; 188fcfa0b09SAl Viro 1893021ad52SChristoph Hellwig psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; 1903021ad52SChristoph Hellwig retv = ipv6_sock_mc_join_ssm(sk, greqs.gsr_interface, 191fcfa0b09SAl Viro &psin6->sin6_addr, 192fcfa0b09SAl Viro MCAST_INCLUDE); 193fcfa0b09SAl Viro /* prior join w/ different source is ok */ 194fcfa0b09SAl Viro if (retv && retv != -EADDRINUSE) 195fcfa0b09SAl Viro return retv; 196fcfa0b09SAl Viro omode = MCAST_INCLUDE; 197fcfa0b09SAl Viro add = 1; 198fcfa0b09SAl Viro } else /* MCAST_LEAVE_SOURCE_GROUP */ { 199fcfa0b09SAl Viro omode = MCAST_INCLUDE; 200fcfa0b09SAl Viro add = 0; 201fcfa0b09SAl Viro } 2023021ad52SChristoph Hellwig return ip6_mc_source(add, omode, sk, &greqs); 203fcfa0b09SAl Viro } 204fcfa0b09SAl Viro 205894cfbc0SChristoph Hellwig static int ipv6_set_mcast_msfilter(struct sock *sk, sockptr_t optval, 206ca0e65ebSChristoph Hellwig int optlen) 207ca0e65ebSChristoph Hellwig { 208ca0e65ebSChristoph Hellwig struct group_filter *gsf; 209ca0e65ebSChristoph Hellwig int ret; 210ca0e65ebSChristoph Hellwig 211ca0e65ebSChristoph Hellwig if (optlen < GROUP_FILTER_SIZE(0)) 212ca0e65ebSChristoph Hellwig return -EINVAL; 213ca0e65ebSChristoph Hellwig if (optlen > sysctl_optmem_max) 214ca0e65ebSChristoph Hellwig return -ENOBUFS; 215ca0e65ebSChristoph Hellwig 216894cfbc0SChristoph Hellwig gsf = memdup_sockptr(optval, optlen); 217ca0e65ebSChristoph Hellwig if (IS_ERR(gsf)) 218ca0e65ebSChristoph Hellwig return PTR_ERR(gsf); 219ca0e65ebSChristoph Hellwig 220ca0e65ebSChristoph Hellwig /* numsrc >= (4G-140)/128 overflow in 32 bits */ 221ca0e65ebSChristoph Hellwig ret = -ENOBUFS; 222ca0e65ebSChristoph Hellwig if (gsf->gf_numsrc >= 0x1ffffffU || 223ca0e65ebSChristoph Hellwig gsf->gf_numsrc > sysctl_mld_max_msf) 224ca0e65ebSChristoph Hellwig goto out_free_gsf; 225ca0e65ebSChristoph Hellwig 226ca0e65ebSChristoph Hellwig ret = -EINVAL; 227ca0e65ebSChristoph Hellwig if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) 228ca0e65ebSChristoph Hellwig goto out_free_gsf; 229ca0e65ebSChristoph Hellwig 230db243b79SGustavo A. R. Silva ret = ip6_mc_msfilter(sk, gsf, gsf->gf_slist_flex); 231ca0e65ebSChristoph Hellwig out_free_gsf: 232ca0e65ebSChristoph Hellwig kfree(gsf); 233ca0e65ebSChristoph Hellwig return ret; 234ca0e65ebSChristoph Hellwig } 235ca0e65ebSChristoph Hellwig 236894cfbc0SChristoph Hellwig static int compat_ipv6_set_mcast_msfilter(struct sock *sk, sockptr_t optval, 237ca0e65ebSChristoph Hellwig int optlen) 238ca0e65ebSChristoph Hellwig { 239db243b79SGustavo A. R. Silva const int size0 = offsetof(struct compat_group_filter, gf_slist_flex); 240ca0e65ebSChristoph Hellwig struct compat_group_filter *gf32; 241ca0e65ebSChristoph Hellwig void *p; 242ca0e65ebSChristoph Hellwig int ret; 243ca0e65ebSChristoph Hellwig int n; 244ca0e65ebSChristoph Hellwig 245ca0e65ebSChristoph Hellwig if (optlen < size0) 246ca0e65ebSChristoph Hellwig return -EINVAL; 247ca0e65ebSChristoph Hellwig if (optlen > sysctl_optmem_max - 4) 248ca0e65ebSChristoph Hellwig return -ENOBUFS; 249ca0e65ebSChristoph Hellwig 250ca0e65ebSChristoph Hellwig p = kmalloc(optlen + 4, GFP_KERNEL); 251ca0e65ebSChristoph Hellwig if (!p) 252ca0e65ebSChristoph Hellwig return -ENOMEM; 253ca0e65ebSChristoph Hellwig 254db243b79SGustavo A. R. Silva gf32 = p + 4; /* we want ->gf_group and ->gf_slist_flex aligned */ 255ca0e65ebSChristoph Hellwig ret = -EFAULT; 256894cfbc0SChristoph Hellwig if (copy_from_sockptr(gf32, optval, optlen)) 257ca0e65ebSChristoph Hellwig goto out_free_p; 258ca0e65ebSChristoph Hellwig 259ca0e65ebSChristoph Hellwig /* numsrc >= (4G-140)/128 overflow in 32 bits */ 260ca0e65ebSChristoph Hellwig ret = -ENOBUFS; 261ca0e65ebSChristoph Hellwig n = gf32->gf_numsrc; 262ca0e65ebSChristoph Hellwig if (n >= 0x1ffffffU || n > sysctl_mld_max_msf) 263ca0e65ebSChristoph Hellwig goto out_free_p; 264ca0e65ebSChristoph Hellwig 265ca0e65ebSChristoph Hellwig ret = -EINVAL; 266db243b79SGustavo A. R. Silva if (offsetof(struct compat_group_filter, gf_slist_flex[n]) > optlen) 267ca0e65ebSChristoph Hellwig goto out_free_p; 268ca0e65ebSChristoph Hellwig 269ca0e65ebSChristoph Hellwig ret = ip6_mc_msfilter(sk, &(struct group_filter){ 270ca0e65ebSChristoph Hellwig .gf_interface = gf32->gf_interface, 271ca0e65ebSChristoph Hellwig .gf_group = gf32->gf_group, 272ca0e65ebSChristoph Hellwig .gf_fmode = gf32->gf_fmode, 273db243b79SGustavo A. R. Silva .gf_numsrc = gf32->gf_numsrc}, gf32->gf_slist_flex); 274ca0e65ebSChristoph Hellwig 275ca0e65ebSChristoph Hellwig out_free_p: 276ca0e65ebSChristoph Hellwig kfree(p); 277ca0e65ebSChristoph Hellwig return ret; 278ca0e65ebSChristoph Hellwig } 279ca0e65ebSChristoph Hellwig 280fdf5bdd8SChristoph Hellwig static int ipv6_mcast_join_leave(struct sock *sk, int optname, 281894cfbc0SChristoph Hellwig sockptr_t optval, int optlen) 282fdf5bdd8SChristoph Hellwig { 283fdf5bdd8SChristoph Hellwig struct sockaddr_in6 *psin6; 284fdf5bdd8SChristoph Hellwig struct group_req greq; 285fdf5bdd8SChristoph Hellwig 286fdf5bdd8SChristoph Hellwig if (optlen < sizeof(greq)) 287fdf5bdd8SChristoph Hellwig return -EINVAL; 288894cfbc0SChristoph Hellwig if (copy_from_sockptr(&greq, optval, sizeof(greq))) 289fdf5bdd8SChristoph Hellwig return -EFAULT; 290fdf5bdd8SChristoph Hellwig 291fdf5bdd8SChristoph Hellwig if (greq.gr_group.ss_family != AF_INET6) 292fdf5bdd8SChristoph Hellwig return -EADDRNOTAVAIL; 293fdf5bdd8SChristoph Hellwig psin6 = (struct sockaddr_in6 *)&greq.gr_group; 294fdf5bdd8SChristoph Hellwig if (optname == MCAST_JOIN_GROUP) 295fdf5bdd8SChristoph Hellwig return ipv6_sock_mc_join(sk, greq.gr_interface, 296fdf5bdd8SChristoph Hellwig &psin6->sin6_addr); 297fdf5bdd8SChristoph Hellwig return ipv6_sock_mc_drop(sk, greq.gr_interface, &psin6->sin6_addr); 298fdf5bdd8SChristoph Hellwig } 299fdf5bdd8SChristoph Hellwig 300fdf5bdd8SChristoph Hellwig static int compat_ipv6_mcast_join_leave(struct sock *sk, int optname, 301894cfbc0SChristoph Hellwig sockptr_t optval, int optlen) 302fdf5bdd8SChristoph Hellwig { 303fdf5bdd8SChristoph Hellwig struct compat_group_req gr32; 304fdf5bdd8SChristoph Hellwig struct sockaddr_in6 *psin6; 305fdf5bdd8SChristoph Hellwig 306fdf5bdd8SChristoph Hellwig if (optlen < sizeof(gr32)) 307fdf5bdd8SChristoph Hellwig return -EINVAL; 308894cfbc0SChristoph Hellwig if (copy_from_sockptr(&gr32, optval, sizeof(gr32))) 309fdf5bdd8SChristoph Hellwig return -EFAULT; 310fdf5bdd8SChristoph Hellwig 311fdf5bdd8SChristoph Hellwig if (gr32.gr_group.ss_family != AF_INET6) 312fdf5bdd8SChristoph Hellwig return -EADDRNOTAVAIL; 313fdf5bdd8SChristoph Hellwig psin6 = (struct sockaddr_in6 *)&gr32.gr_group; 314fdf5bdd8SChristoph Hellwig if (optname == MCAST_JOIN_GROUP) 3153021ad52SChristoph Hellwig return ipv6_sock_mc_join(sk, gr32.gr_interface, 316fdf5bdd8SChristoph Hellwig &psin6->sin6_addr); 3173021ad52SChristoph Hellwig return ipv6_sock_mc_drop(sk, gr32.gr_interface, &psin6->sin6_addr); 318fdf5bdd8SChristoph Hellwig } 319fdf5bdd8SChristoph Hellwig 320894cfbc0SChristoph Hellwig static int ipv6_set_opt_hdr(struct sock *sk, int optname, sockptr_t optval, 321b84d2b73SChristoph Hellwig int optlen) 322b84d2b73SChristoph Hellwig { 323b84d2b73SChristoph Hellwig struct ipv6_pinfo *np = inet6_sk(sk); 324b84d2b73SChristoph Hellwig struct ipv6_opt_hdr *new = NULL; 325b84d2b73SChristoph Hellwig struct net *net = sock_net(sk); 326b84d2b73SChristoph Hellwig struct ipv6_txoptions *opt; 327b84d2b73SChristoph Hellwig int err; 328b84d2b73SChristoph Hellwig 329b84d2b73SChristoph Hellwig /* hop-by-hop / destination options are privileged option */ 330b84d2b73SChristoph Hellwig if (optname != IPV6_RTHDR && !ns_capable(net->user_ns, CAP_NET_RAW)) 331b84d2b73SChristoph Hellwig return -EPERM; 332b84d2b73SChristoph Hellwig 333b84d2b73SChristoph Hellwig /* remove any sticky options header with a zero option 334b84d2b73SChristoph Hellwig * length, per RFC3542. 335b84d2b73SChristoph Hellwig */ 336b84d2b73SChristoph Hellwig if (optlen > 0) { 337894cfbc0SChristoph Hellwig if (sockptr_is_null(optval)) 338b84d2b73SChristoph Hellwig return -EINVAL; 339b84d2b73SChristoph Hellwig if (optlen < sizeof(struct ipv6_opt_hdr) || 340b84d2b73SChristoph Hellwig optlen & 0x7 || 341b84d2b73SChristoph Hellwig optlen > 8 * 255) 342b84d2b73SChristoph Hellwig return -EINVAL; 343b84d2b73SChristoph Hellwig 344894cfbc0SChristoph Hellwig new = memdup_sockptr(optval, optlen); 345b84d2b73SChristoph Hellwig if (IS_ERR(new)) 346b84d2b73SChristoph Hellwig return PTR_ERR(new); 347b84d2b73SChristoph Hellwig if (unlikely(ipv6_optlen(new) > optlen)) { 348b84d2b73SChristoph Hellwig kfree(new); 349b84d2b73SChristoph Hellwig return -EINVAL; 350b84d2b73SChristoph Hellwig } 351b84d2b73SChristoph Hellwig } 352b84d2b73SChristoph Hellwig 353b84d2b73SChristoph Hellwig opt = rcu_dereference_protected(np->opt, lockdep_sock_is_held(sk)); 354b84d2b73SChristoph Hellwig opt = ipv6_renew_options(sk, opt, optname, new); 355b84d2b73SChristoph Hellwig kfree(new); 356b84d2b73SChristoph Hellwig if (IS_ERR(opt)) 357b84d2b73SChristoph Hellwig return PTR_ERR(opt); 358b84d2b73SChristoph Hellwig 359b84d2b73SChristoph Hellwig /* routing header option needs extra check */ 360b84d2b73SChristoph Hellwig err = -EINVAL; 361b84d2b73SChristoph Hellwig if (optname == IPV6_RTHDR && opt && opt->srcrt) { 362b84d2b73SChristoph Hellwig struct ipv6_rt_hdr *rthdr = opt->srcrt; 363b84d2b73SChristoph Hellwig switch (rthdr->type) { 364b84d2b73SChristoph Hellwig #if IS_ENABLED(CONFIG_IPV6_MIP6) 365b84d2b73SChristoph Hellwig case IPV6_SRCRT_TYPE_2: 366b84d2b73SChristoph Hellwig if (rthdr->hdrlen != 2 || rthdr->segments_left != 1) 367b84d2b73SChristoph Hellwig goto sticky_done; 368b84d2b73SChristoph Hellwig break; 369b84d2b73SChristoph Hellwig #endif 370b84d2b73SChristoph Hellwig case IPV6_SRCRT_TYPE_4: 371b84d2b73SChristoph Hellwig { 372b84d2b73SChristoph Hellwig struct ipv6_sr_hdr *srh = 373b84d2b73SChristoph Hellwig (struct ipv6_sr_hdr *)opt->srcrt; 374b84d2b73SChristoph Hellwig 375b84d2b73SChristoph Hellwig if (!seg6_validate_srh(srh, optlen, false)) 376b84d2b73SChristoph Hellwig goto sticky_done; 377b84d2b73SChristoph Hellwig break; 378b84d2b73SChristoph Hellwig } 379b84d2b73SChristoph Hellwig default: 380b84d2b73SChristoph Hellwig goto sticky_done; 381b84d2b73SChristoph Hellwig } 382b84d2b73SChristoph Hellwig } 383b84d2b73SChristoph Hellwig 384b84d2b73SChristoph Hellwig err = 0; 385b84d2b73SChristoph Hellwig opt = ipv6_update_options(sk, opt); 386b84d2b73SChristoph Hellwig sticky_done: 387b84d2b73SChristoph Hellwig if (opt) { 388b84d2b73SChristoph Hellwig atomic_sub(opt->tot_len, &sk->sk_omem_alloc); 389b84d2b73SChristoph Hellwig txopt_put(opt); 390b84d2b73SChristoph Hellwig } 391b84d2b73SChristoph Hellwig return err; 392b84d2b73SChristoph Hellwig } 393b84d2b73SChristoph Hellwig 3943fdadf7dSDmitry Mishin static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, 395894cfbc0SChristoph Hellwig sockptr_t optval, unsigned int optlen) 3961da177e4SLinus Torvalds { 3971da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 3983b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(sk); 3991da177e4SLinus Torvalds int val, valbool; 4001da177e4SLinus Torvalds int retv = -ENOPROTOOPT; 401baf606d9SMarcelo Ricardo Leitner bool needs_rtnl = setsockopt_needs_rtnl(optname); 4021da177e4SLinus Torvalds 403894cfbc0SChristoph Hellwig if (sockptr_is_null(optval)) 4041da177e4SLinus Torvalds val = 0; 405b2a9d7c2SYOSHIFUJI Hideaki else { 406b2a9d7c2SYOSHIFUJI Hideaki if (optlen >= sizeof(int)) { 407894cfbc0SChristoph Hellwig if (copy_from_sockptr(&val, optval, sizeof(val))) 4081da177e4SLinus Torvalds return -EFAULT; 409b2a9d7c2SYOSHIFUJI Hideaki } else 410b2a9d7c2SYOSHIFUJI Hideaki val = 0; 411b2a9d7c2SYOSHIFUJI Hideaki } 4121da177e4SLinus Torvalds 4131da177e4SLinus Torvalds valbool = (val != 0); 4141da177e4SLinus Torvalds 4157bc570c8SYOSHIFUJI Hideaki if (ip6_mroute_opt(optname)) 416894cfbc0SChristoph Hellwig return ip6_mroute_setsockopt(sk, optname, optval, optlen); 4177bc570c8SYOSHIFUJI Hideaki 418baf606d9SMarcelo Ricardo Leitner if (needs_rtnl) 419baf606d9SMarcelo Ricardo Leitner rtnl_lock(); 4201da177e4SLinus Torvalds lock_sock(sk); 4211da177e4SLinus Torvalds 4221da177e4SLinus Torvalds switch (optname) { 4231da177e4SLinus Torvalds 4241da177e4SLinus Torvalds case IPV6_ADDRFORM: 425b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 426b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 4271da177e4SLinus Torvalds if (val == PF_INET) { 4281da177e4SLinus Torvalds struct ipv6_txoptions *opt; 4291da177e4SLinus Torvalds struct sk_buff *pktopt; 4301da177e4SLinus Torvalds 43149d074f4SDenis V. Lunev if (sk->sk_type == SOCK_RAW) 43249d074f4SDenis V. Lunev break; 43349d074f4SDenis V. Lunev 4349596cc82SDenis V. Lunev if (sk->sk_protocol == IPPROTO_UDP || 4359596cc82SDenis V. Lunev sk->sk_protocol == IPPROTO_UDPLITE) { 4369596cc82SDenis V. Lunev struct udp_sock *up = udp_sk(sk); 4379596cc82SDenis V. Lunev if (up->pending == AF_INET6) { 4389596cc82SDenis V. Lunev retv = -EBUSY; 4399596cc82SDenis V. Lunev break; 4409596cc82SDenis V. Lunev } 44179a1f0ccSHangbin Liu } else if (sk->sk_protocol == IPPROTO_TCP) { 44279a1f0ccSHangbin Liu if (sk->sk_prot != &tcpv6_prot) { 443b6f61189SEric Dumazet retv = -EBUSY; 4441da177e4SLinus Torvalds break; 445b6f61189SEric Dumazet } 44679a1f0ccSHangbin Liu } else { 447b6f61189SEric Dumazet break; 44879a1f0ccSHangbin Liu } 44979a1f0ccSHangbin Liu 4501da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) { 4511da177e4SLinus Torvalds retv = -ENOTCONN; 4521da177e4SLinus Torvalds break; 4531da177e4SLinus Torvalds } 4541da177e4SLinus Torvalds 4551da177e4SLinus Torvalds if (ipv6_only_sock(sk) || 456efe4208fSEric Dumazet !ipv6_addr_v4mapped(&sk->sk_v6_daddr)) { 4571da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 4581da177e4SLinus Torvalds break; 4591da177e4SLinus Torvalds } 4601da177e4SLinus Torvalds 4611da177e4SLinus Torvalds fl6_free_socklist(sk); 4628651be8fSWANG Cong __ipv6_sock_mc_close(sk); 4638c0de6e9SCong Wang __ipv6_sock_ac_close(sk); 4641da177e4SLinus Torvalds 465e6848976SArnaldo Carvalho de Melo /* 466e6848976SArnaldo Carvalho de Melo * Sock is moving from IPv6 to IPv4 (sk_prot), so 467e6848976SArnaldo Carvalho de Melo * remove it from the refcnt debug socks count in the 468e6848976SArnaldo Carvalho de Melo * original family... 469e6848976SArnaldo Carvalho de Melo */ 470e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_dec(sk); 471e6848976SArnaldo Carvalho de Melo 4721da177e4SLinus Torvalds if (sk->sk_protocol == IPPROTO_TCP) { 473d83d8461SArnaldo Carvalho de Melo struct inet_connection_sock *icsk = inet_csk(sk); 474b3cb764aSEric Dumazet 475c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, sk->sk_prot, -1); 476c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, &tcp_prot, 1); 477b3cb764aSEric Dumazet 478*086d4905SEric Dumazet /* Paired with READ_ONCE(sk->sk_prot) in net/ipv6/af_inet6.c */ 479*086d4905SEric Dumazet WRITE_ONCE(sk->sk_prot, &tcp_prot); 480d83d8461SArnaldo Carvalho de Melo icsk->icsk_af_ops = &ipv4_specific; 4811da177e4SLinus Torvalds sk->sk_socket->ops = &inet_stream_ops; 4821da177e4SLinus Torvalds sk->sk_family = PF_INET; 483d83d8461SArnaldo Carvalho de Melo tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); 4841da177e4SLinus Torvalds } else { 485ba4e58ecSGerrit Renker struct proto *prot = &udp_prot; 486ba4e58ecSGerrit Renker 487db8dac20SDavid S. Miller if (sk->sk_protocol == IPPROTO_UDPLITE) 488ba4e58ecSGerrit Renker prot = &udplite_prot; 489b3cb764aSEric Dumazet 490c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, sk->sk_prot, -1); 491c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, prot, 1); 492b3cb764aSEric Dumazet 493*086d4905SEric Dumazet /* Paired with READ_ONCE(sk->sk_prot) in net/ipv6/af_inet6.c */ 494*086d4905SEric Dumazet WRITE_ONCE(sk->sk_prot, prot); 4951da177e4SLinus Torvalds sk->sk_socket->ops = &inet_dgram_ops; 4961da177e4SLinus Torvalds sk->sk_family = PF_INET; 4971da177e4SLinus Torvalds } 49845f6fad8SEric Dumazet opt = xchg((__force struct ipv6_txoptions **)&np->opt, 49945f6fad8SEric Dumazet NULL); 50045f6fad8SEric Dumazet if (opt) { 50145f6fad8SEric Dumazet atomic_sub(opt->tot_len, &sk->sk_omem_alloc); 50245f6fad8SEric Dumazet txopt_put(opt); 50345f6fad8SEric Dumazet } 5041da177e4SLinus Torvalds pktopt = xchg(&np->pktoptions, NULL); 5051da177e4SLinus Torvalds kfree_skb(pktopt); 5061da177e4SLinus Torvalds 507e6848976SArnaldo Carvalho de Melo /* 508e6848976SArnaldo Carvalho de Melo * ... and add it to the refcnt debug socks count 509e6848976SArnaldo Carvalho de Melo * in the new family. -acme 510e6848976SArnaldo Carvalho de Melo */ 511e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_inc(sk); 5121da177e4SLinus Torvalds module_put(THIS_MODULE); 5131da177e4SLinus Torvalds retv = 0; 5141da177e4SLinus Torvalds break; 5151da177e4SLinus Torvalds } 5161da177e4SLinus Torvalds goto e_inval; 5171da177e4SLinus Torvalds 5181da177e4SLinus Torvalds case IPV6_V6ONLY: 519b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int) || 520c720c7e8SEric Dumazet inet_sk(sk)->inet_num) 5211da177e4SLinus Torvalds goto e_inval; 5229fe516baSEric Dumazet sk->sk_ipv6only = valbool; 5231da177e4SLinus Torvalds retv = 0; 5241da177e4SLinus Torvalds break; 5251da177e4SLinus Torvalds 526333fad53SYOSHIFUJI Hideaki case IPV6_RECVPKTINFO: 527b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 528b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 5291da177e4SLinus Torvalds np->rxopt.bits.rxinfo = valbool; 5301da177e4SLinus Torvalds retv = 0; 5311da177e4SLinus Torvalds break; 5321da177e4SLinus Torvalds 533333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 534b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 535b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 536333fad53SYOSHIFUJI Hideaki np->rxopt.bits.rxoinfo = valbool; 537333fad53SYOSHIFUJI Hideaki retv = 0; 538333fad53SYOSHIFUJI Hideaki break; 539333fad53SYOSHIFUJI Hideaki 540333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPLIMIT: 541b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 542b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 5431da177e4SLinus Torvalds np->rxopt.bits.rxhlim = valbool; 5441da177e4SLinus Torvalds retv = 0; 5451da177e4SLinus Torvalds break; 5461da177e4SLinus Torvalds 547333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 548b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 549b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 550333fad53SYOSHIFUJI Hideaki np->rxopt.bits.rxohlim = valbool; 551333fad53SYOSHIFUJI Hideaki retv = 0; 552333fad53SYOSHIFUJI Hideaki break; 553333fad53SYOSHIFUJI Hideaki 554333fad53SYOSHIFUJI Hideaki case IPV6_RECVRTHDR: 555b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 556b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 5574c752098SYOSHIFUJI Hideaki np->rxopt.bits.srcrt = valbool; 5581da177e4SLinus Torvalds retv = 0; 5591da177e4SLinus Torvalds break; 5601da177e4SLinus Torvalds 561333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 562b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 563b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 5644c752098SYOSHIFUJI Hideaki np->rxopt.bits.osrcrt = valbool; 565333fad53SYOSHIFUJI Hideaki retv = 0; 566333fad53SYOSHIFUJI Hideaki break; 567333fad53SYOSHIFUJI Hideaki 568333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPOPTS: 569b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 570b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 5711da177e4SLinus Torvalds np->rxopt.bits.hopopts = valbool; 5721da177e4SLinus Torvalds retv = 0; 5731da177e4SLinus Torvalds break; 5741da177e4SLinus Torvalds 575333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 576b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 577b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 578333fad53SYOSHIFUJI Hideaki np->rxopt.bits.ohopopts = valbool; 579333fad53SYOSHIFUJI Hideaki retv = 0; 580333fad53SYOSHIFUJI Hideaki break; 581333fad53SYOSHIFUJI Hideaki 582333fad53SYOSHIFUJI Hideaki case IPV6_RECVDSTOPTS: 583b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 584b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 5851da177e4SLinus Torvalds np->rxopt.bits.dstopts = valbool; 5861da177e4SLinus Torvalds retv = 0; 5871da177e4SLinus Torvalds break; 5881da177e4SLinus Torvalds 589333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 590b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 591b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 592333fad53SYOSHIFUJI Hideaki np->rxopt.bits.odstopts = valbool; 593333fad53SYOSHIFUJI Hideaki retv = 0; 594333fad53SYOSHIFUJI Hideaki break; 595333fad53SYOSHIFUJI Hideaki 59641a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 597b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 598b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 599d0ee011fSRemi Denis-Courmont if (val < -1 || val > 0xff) 60041a1f8eaSYOSHIFUJI Hideaki goto e_inval; 60126ced1e4SGerrit Renker /* RFC 3542, 6.5: default traffic class of 0x0 */ 60226ced1e4SGerrit Renker if (val == -1) 60326ced1e4SGerrit Renker val = 0; 6049f7b3a69SMaciej Żenczykowski if (sk->sk_type == SOCK_STREAM) { 6059f7b3a69SMaciej Żenczykowski val &= ~INET_ECN_MASK; 6069f7b3a69SMaciej Żenczykowski val |= np->tclass & INET_ECN_MASK; 6079f7b3a69SMaciej Żenczykowski } 608305e95bbSMaciej Żenczykowski if (np->tclass != val) { 60941a1f8eaSYOSHIFUJI Hideaki np->tclass = val; 610305e95bbSMaciej Żenczykowski sk_dst_reset(sk); 611305e95bbSMaciej Żenczykowski } 61241a1f8eaSYOSHIFUJI Hideaki retv = 0; 61341a1f8eaSYOSHIFUJI Hideaki break; 61441a1f8eaSYOSHIFUJI Hideaki 61541a1f8eaSYOSHIFUJI Hideaki case IPV6_RECVTCLASS: 616b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 617b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 61841a1f8eaSYOSHIFUJI Hideaki np->rxopt.bits.rxtclass = valbool; 61941a1f8eaSYOSHIFUJI Hideaki retv = 0; 62041a1f8eaSYOSHIFUJI Hideaki break; 62141a1f8eaSYOSHIFUJI Hideaki 6221da177e4SLinus Torvalds case IPV6_FLOWINFO: 623b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 624b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 6251da177e4SLinus Torvalds np->rxopt.bits.rxflow = valbool; 6261da177e4SLinus Torvalds retv = 0; 6271da177e4SLinus Torvalds break; 6281da177e4SLinus Torvalds 629793b1473SBrian Haley case IPV6_RECVPATHMTU: 630793b1473SBrian Haley if (optlen < sizeof(int)) 631793b1473SBrian Haley goto e_inval; 632793b1473SBrian Haley np->rxopt.bits.rxpmtu = valbool; 633793b1473SBrian Haley retv = 0; 634793b1473SBrian Haley break; 635793b1473SBrian Haley 6366c468622SBalazs Scheidler case IPV6_TRANSPARENT: 63735fc59c9SMaciej Żenczykowski if (valbool && !ns_capable(net->user_ns, CAP_NET_RAW) && 63835fc59c9SMaciej Żenczykowski !ns_capable(net->user_ns, CAP_NET_ADMIN)) { 639b889416bSBalazs Scheidler retv = -EPERM; 640b889416bSBalazs Scheidler break; 641b889416bSBalazs Scheidler } 6426c468622SBalazs Scheidler if (optlen < sizeof(int)) 6436c468622SBalazs Scheidler goto e_inval; 6446c468622SBalazs Scheidler /* we don't have a separate transparent bit for IPV6 we use the one in the IPv4 socket */ 6456c468622SBalazs Scheidler inet_sk(sk)->transparent = valbool; 6466c468622SBalazs Scheidler retv = 0; 6476c468622SBalazs Scheidler break; 6486c468622SBalazs Scheidler 64984e14fe3SMaciej Żenczykowski case IPV6_FREEBIND: 65084e14fe3SMaciej Żenczykowski if (optlen < sizeof(int)) 65184e14fe3SMaciej Żenczykowski goto e_inval; 65284e14fe3SMaciej Żenczykowski /* we also don't have a separate freebind bit for IPV6 */ 65384e14fe3SMaciej Żenczykowski inet_sk(sk)->freebind = valbool; 65484e14fe3SMaciej Żenczykowski retv = 0; 65584e14fe3SMaciej Żenczykowski break; 65684e14fe3SMaciej Żenczykowski 6576c468622SBalazs Scheidler case IPV6_RECVORIGDSTADDR: 6586c468622SBalazs Scheidler if (optlen < sizeof(int)) 6596c468622SBalazs Scheidler goto e_inval; 6606c468622SBalazs Scheidler np->rxopt.bits.rxorigdstaddr = valbool; 6616c468622SBalazs Scheidler retv = 0; 6626c468622SBalazs Scheidler break; 6636c468622SBalazs Scheidler 664333fad53SYOSHIFUJI Hideaki case IPV6_HOPOPTS: 665333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 666333fad53SYOSHIFUJI Hideaki case IPV6_RTHDR: 667333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 668b84d2b73SChristoph Hellwig retv = ipv6_set_opt_hdr(sk, optname, optval, optlen); 669a9ba23d4SPaul Moore break; 670aea7427fSShan Wei 671b24a2516SYang Hongyang case IPV6_PKTINFO: 672b24a2516SYang Hongyang { 673b24a2516SYang Hongyang struct in6_pktinfo pkt; 674b24a2516SYang Hongyang 675b24a2516SYang Hongyang if (optlen == 0) 676b24a2516SYang Hongyang goto e_inval; 677894cfbc0SChristoph Hellwig else if (optlen < sizeof(struct in6_pktinfo) || 678894cfbc0SChristoph Hellwig sockptr_is_null(optval)) 679b24a2516SYang Hongyang goto e_inval; 680b24a2516SYang Hongyang 681894cfbc0SChristoph Hellwig if (copy_from_sockptr(&pkt, optval, sizeof(pkt))) { 682b24a2516SYang Hongyang retv = -EFAULT; 683b24a2516SYang Hongyang break; 684b24a2516SYang Hongyang } 685d839a0ebSMike Manning if (!sk_dev_equal_l3scope(sk, pkt.ipi6_ifindex)) 686b24a2516SYang Hongyang goto e_inval; 687b24a2516SYang Hongyang 688b24a2516SYang Hongyang np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex; 6894e3fd7a0SAlexey Dobriyan np->sticky_pktinfo.ipi6_addr = pkt.ipi6_addr; 690b24a2516SYang Hongyang retv = 0; 691b24a2516SYang Hongyang break; 692b24a2516SYang Hongyang } 693b24a2516SYang Hongyang 694333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTOPTIONS: 6951da177e4SLinus Torvalds { 6961da177e4SLinus Torvalds struct ipv6_txoptions *opt = NULL; 6971da177e4SLinus Torvalds struct msghdr msg; 6984c9483b2SDavid S. Miller struct flowi6 fl6; 69926879da5SWei Wang struct ipcm6_cookie ipc6; 7001da177e4SLinus Torvalds 7014c9483b2SDavid S. Miller memset(&fl6, 0, sizeof(fl6)); 7024c9483b2SDavid S. Miller fl6.flowi6_oif = sk->sk_bound_dev_if; 7034c9483b2SDavid S. Miller fl6.flowi6_mark = sk->sk_mark; 7041da177e4SLinus Torvalds 7051da177e4SLinus Torvalds if (optlen == 0) 7061da177e4SLinus Torvalds goto update; 7071da177e4SLinus Torvalds 7081da177e4SLinus Torvalds /* 1K is probably excessive 7091da177e4SLinus Torvalds * 1K is surely not enough, 2K per standard header is 16K. 7101da177e4SLinus Torvalds */ 7111da177e4SLinus Torvalds retv = -EINVAL; 7121da177e4SLinus Torvalds if (optlen > 64*1024) 7131da177e4SLinus Torvalds break; 7141da177e4SLinus Torvalds 7151da177e4SLinus Torvalds opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); 7161da177e4SLinus Torvalds retv = -ENOBUFS; 71763159f29SIan Morris if (!opt) 7181da177e4SLinus Torvalds break; 7191da177e4SLinus Torvalds 7201da177e4SLinus Torvalds memset(opt, 0, sizeof(*opt)); 7210aeea21aSReshetova, Elena refcount_set(&opt->refcnt, 1); 7221da177e4SLinus Torvalds opt->tot_len = sizeof(*opt) + optlen; 7231da177e4SLinus Torvalds retv = -EFAULT; 724894cfbc0SChristoph Hellwig if (copy_from_sockptr(opt + 1, optval, optlen)) 7251da177e4SLinus Torvalds goto done; 7261da177e4SLinus Torvalds 7271da177e4SLinus Torvalds msg.msg_controllen = optlen; 7281da177e4SLinus Torvalds msg.msg_control = (void *)(opt+1); 72926879da5SWei Wang ipc6.opt = opt; 7301da177e4SLinus Torvalds 7315fdaa88dSWillem de Bruijn retv = ip6_datagram_send_ctl(net, sk, &msg, &fl6, &ipc6); 7321da177e4SLinus Torvalds if (retv) 7331da177e4SLinus Torvalds goto done; 7341da177e4SLinus Torvalds update: 7351da177e4SLinus Torvalds retv = 0; 736e7712f1aSYOSHIFUJI Hideaki opt = ipv6_update_options(sk, opt); 7371da177e4SLinus Torvalds done: 73845f6fad8SEric Dumazet if (opt) { 73945f6fad8SEric Dumazet atomic_sub(opt->tot_len, &sk->sk_omem_alloc); 74045f6fad8SEric Dumazet txopt_put(opt); 74145f6fad8SEric Dumazet } 7421da177e4SLinus Torvalds break; 7431da177e4SLinus Torvalds } 7441da177e4SLinus Torvalds case IPV6_UNICAST_HOPS: 745b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 746b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 7471da177e4SLinus Torvalds if (val > 255 || val < -1) 7481da177e4SLinus Torvalds goto e_inval; 7491da177e4SLinus Torvalds np->hop_limit = val; 7501da177e4SLinus Torvalds retv = 0; 7511da177e4SLinus Torvalds break; 7521da177e4SLinus Torvalds 7531da177e4SLinus Torvalds case IPV6_MULTICAST_HOPS: 7541da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM) 7551717699cSYOSHIFUJI Hideaki break; 756b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 757b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 7581da177e4SLinus Torvalds if (val > 255 || val < -1) 7591da177e4SLinus Torvalds goto e_inval; 7602a38e6d5SLi Wei np->mcast_hops = (val == -1 ? IPV6_DEFAULT_MCASTHOPS : val); 7611da177e4SLinus Torvalds retv = 0; 7621da177e4SLinus Torvalds break; 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvalds case IPV6_MULTICAST_LOOP: 765b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 766b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 76728d44882SYOSHIFUJI Hideaki if (val != valbool) 76828d44882SYOSHIFUJI Hideaki goto e_inval; 7691da177e4SLinus Torvalds np->mc_loop = valbool; 7701da177e4SLinus Torvalds retv = 0; 7711da177e4SLinus Torvalds break; 7721da177e4SLinus Torvalds 773c4062dfcSErich E. Hoover case IPV6_UNICAST_IF: 774c4062dfcSErich E. Hoover { 775c4062dfcSErich E. Hoover struct net_device *dev = NULL; 776c4062dfcSErich E. Hoover int ifindex; 777c4062dfcSErich E. Hoover 778c4062dfcSErich E. Hoover if (optlen != sizeof(int)) 779c4062dfcSErich E. Hoover goto e_inval; 780c4062dfcSErich E. Hoover 781c4062dfcSErich E. Hoover ifindex = (__force int)ntohl((__force __be32)val); 782c4062dfcSErich E. Hoover if (ifindex == 0) { 783c4062dfcSErich E. Hoover np->ucast_oif = 0; 784c4062dfcSErich E. Hoover retv = 0; 785c4062dfcSErich E. Hoover break; 786c4062dfcSErich E. Hoover } 787c4062dfcSErich E. Hoover 788c4062dfcSErich E. Hoover dev = dev_get_by_index(net, ifindex); 789c4062dfcSErich E. Hoover retv = -EADDRNOTAVAIL; 790c4062dfcSErich E. Hoover if (!dev) 791c4062dfcSErich E. Hoover break; 792c4062dfcSErich E. Hoover dev_put(dev); 793c4062dfcSErich E. Hoover 794c4062dfcSErich E. Hoover retv = -EINVAL; 795c4062dfcSErich E. Hoover if (sk->sk_bound_dev_if) 796c4062dfcSErich E. Hoover break; 797c4062dfcSErich E. Hoover 798c4062dfcSErich E. Hoover np->ucast_oif = ifindex; 799c4062dfcSErich E. Hoover retv = 0; 800c4062dfcSErich E. Hoover break; 801c4062dfcSErich E. Hoover } 802c4062dfcSErich E. Hoover 8031da177e4SLinus Torvalds case IPV6_MULTICAST_IF: 8041da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM) 8051717699cSYOSHIFUJI Hideaki break; 806b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 807b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 8084953f0fcSBrian Haley 8094953f0fcSBrian Haley if (val) { 81055b80503SEric Dumazet struct net_device *dev; 8117bb387c5SDavid Ahern int midx; 81255b80503SEric Dumazet 8137bb387c5SDavid Ahern rcu_read_lock(); 8141da177e4SLinus Torvalds 8157bb387c5SDavid Ahern dev = dev_get_by_index_rcu(net, val); 81655b80503SEric Dumazet if (!dev) { 8177bb387c5SDavid Ahern rcu_read_unlock(); 8181da177e4SLinus Torvalds retv = -ENODEV; 8191da177e4SLinus Torvalds break; 8201da177e4SLinus Torvalds } 8217bb387c5SDavid Ahern midx = l3mdev_master_ifindex_rcu(dev); 8227bb387c5SDavid Ahern 8237bb387c5SDavid Ahern rcu_read_unlock(); 8247bb387c5SDavid Ahern 8257bb387c5SDavid Ahern if (sk->sk_bound_dev_if && 8267bb387c5SDavid Ahern sk->sk_bound_dev_if != val && 8277bb387c5SDavid Ahern (!midx || midx != sk->sk_bound_dev_if)) 8287bb387c5SDavid Ahern goto e_inval; 8294953f0fcSBrian Haley } 8301da177e4SLinus Torvalds np->mcast_oif = val; 8311da177e4SLinus Torvalds retv = 0; 8321da177e4SLinus Torvalds break; 8331da177e4SLinus Torvalds case IPV6_ADD_MEMBERSHIP: 8341da177e4SLinus Torvalds case IPV6_DROP_MEMBERSHIP: 8351da177e4SLinus Torvalds { 8361da177e4SLinus Torvalds struct ipv6_mreq mreq; 8371da177e4SLinus Torvalds 838a28398baSWang Chen if (optlen < sizeof(struct ipv6_mreq)) 839a28398baSWang Chen goto e_inval; 840a28398baSWang Chen 841a96fb49bSFlavio Leitner retv = -EPROTO; 842a96fb49bSFlavio Leitner if (inet_sk(sk)->is_icsk) 843a96fb49bSFlavio Leitner break; 844a96fb49bSFlavio Leitner 8451da177e4SLinus Torvalds retv = -EFAULT; 846894cfbc0SChristoph Hellwig if (copy_from_sockptr(&mreq, optval, sizeof(struct ipv6_mreq))) 8471da177e4SLinus Torvalds break; 8481da177e4SLinus Torvalds 8491da177e4SLinus Torvalds if (optname == IPV6_ADD_MEMBERSHIP) 85054ff9ef3SMarcelo Ricardo Leitner retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); 8511da177e4SLinus Torvalds else 85254ff9ef3SMarcelo Ricardo Leitner retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); 8531da177e4SLinus Torvalds break; 8541da177e4SLinus Torvalds } 8551da177e4SLinus Torvalds case IPV6_JOIN_ANYCAST: 8561da177e4SLinus Torvalds case IPV6_LEAVE_ANYCAST: 8571da177e4SLinus Torvalds { 8581da177e4SLinus Torvalds struct ipv6_mreq mreq; 8591da177e4SLinus Torvalds 860a28398baSWang Chen if (optlen < sizeof(struct ipv6_mreq)) 8611da177e4SLinus Torvalds goto e_inval; 8621da177e4SLinus Torvalds 8631da177e4SLinus Torvalds retv = -EFAULT; 864894cfbc0SChristoph Hellwig if (copy_from_sockptr(&mreq, optval, sizeof(struct ipv6_mreq))) 8651da177e4SLinus Torvalds break; 8661da177e4SLinus Torvalds 8671da177e4SLinus Torvalds if (optname == IPV6_JOIN_ANYCAST) 8681da177e4SLinus Torvalds retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); 8691da177e4SLinus Torvalds else 8701da177e4SLinus Torvalds retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); 8711da177e4SLinus Torvalds break; 8721da177e4SLinus Torvalds } 87315033f04SAndre Naujoks case IPV6_MULTICAST_ALL: 87415033f04SAndre Naujoks if (optlen < sizeof(int)) 87515033f04SAndre Naujoks goto e_inval; 87615033f04SAndre Naujoks np->mc_all = valbool; 87715033f04SAndre Naujoks retv = 0; 87815033f04SAndre Naujoks break; 87915033f04SAndre Naujoks 8801da177e4SLinus Torvalds case MCAST_JOIN_GROUP: 8811da177e4SLinus Torvalds case MCAST_LEAVE_GROUP: 8823021ad52SChristoph Hellwig if (in_compat_syscall()) 8833021ad52SChristoph Hellwig retv = compat_ipv6_mcast_join_leave(sk, optname, optval, 8843021ad52SChristoph Hellwig optlen); 8853021ad52SChristoph Hellwig else 8863021ad52SChristoph Hellwig retv = ipv6_mcast_join_leave(sk, optname, optval, 8873021ad52SChristoph Hellwig optlen); 8881da177e4SLinus Torvalds break; 8891da177e4SLinus Torvalds case MCAST_JOIN_SOURCE_GROUP: 8901da177e4SLinus Torvalds case MCAST_LEAVE_SOURCE_GROUP: 8911da177e4SLinus Torvalds case MCAST_BLOCK_SOURCE: 8921da177e4SLinus Torvalds case MCAST_UNBLOCK_SOURCE: 8933021ad52SChristoph Hellwig retv = do_ipv6_mcast_group_source(sk, optname, optval, optlen); 8941da177e4SLinus Torvalds break; 8951da177e4SLinus Torvalds case MCAST_MSFILTER: 8963021ad52SChristoph Hellwig if (in_compat_syscall()) 8973021ad52SChristoph Hellwig retv = compat_ipv6_set_mcast_msfilter(sk, optval, 8983021ad52SChristoph Hellwig optlen); 8993021ad52SChristoph Hellwig else 900ca0e65ebSChristoph Hellwig retv = ipv6_set_mcast_msfilter(sk, optval, optlen); 9011da177e4SLinus Torvalds break; 9021da177e4SLinus Torvalds case IPV6_ROUTER_ALERT: 903b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 904b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 905725a8ff0SDenis V. Lunev retv = ip6_ra_control(sk, val); 9061da177e4SLinus Torvalds break; 9079036b2feSFrancesco Ruggeri case IPV6_ROUTER_ALERT_ISOLATE: 9089036b2feSFrancesco Ruggeri if (optlen < sizeof(int)) 9099036b2feSFrancesco Ruggeri goto e_inval; 9109036b2feSFrancesco Ruggeri np->rtalert_isolate = valbool; 9119036b2feSFrancesco Ruggeri retv = 0; 9129036b2feSFrancesco Ruggeri break; 9131da177e4SLinus Torvalds case IPV6_MTU_DISCOVER: 914b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 915b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 9160b95227aSHannes Frederic Sowa if (val < IPV6_PMTUDISC_DONT || val > IPV6_PMTUDISC_OMIT) 9171da177e4SLinus Torvalds goto e_inval; 9181da177e4SLinus Torvalds np->pmtudisc = val; 9191da177e4SLinus Torvalds retv = 0; 9201da177e4SLinus Torvalds break; 9211da177e4SLinus Torvalds case IPV6_MTU: 922b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 923b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 9241da177e4SLinus Torvalds if (val && val < IPV6_MIN_MTU) 9251da177e4SLinus Torvalds goto e_inval; 9261da177e4SLinus Torvalds np->frag_size = val; 9271da177e4SLinus Torvalds retv = 0; 9281da177e4SLinus Torvalds break; 9291da177e4SLinus Torvalds case IPV6_RECVERR: 930b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 931b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 9321da177e4SLinus Torvalds np->recverr = valbool; 9331da177e4SLinus Torvalds if (!val) 9341da177e4SLinus Torvalds skb_queue_purge(&sk->sk_error_queue); 9351da177e4SLinus Torvalds retv = 0; 9361da177e4SLinus Torvalds break; 9371da177e4SLinus Torvalds case IPV6_FLOWINFO_SEND: 938b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 939b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 9401da177e4SLinus Torvalds np->sndflow = valbool; 9411da177e4SLinus Torvalds retv = 0; 9421da177e4SLinus Torvalds break; 9431da177e4SLinus Torvalds case IPV6_FLOWLABEL_MGR: 944894cfbc0SChristoph Hellwig retv = ipv6_flowlabel_opt(sk, optval, optlen); 9451da177e4SLinus Torvalds break; 9461da177e4SLinus Torvalds case IPV6_IPSEC_POLICY: 9471da177e4SLinus Torvalds case IPV6_XFRM_POLICY: 9486fc0b4a7SHerbert Xu retv = -EPERM; 949af31f412SEric W. Biederman if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 9506fc0b4a7SHerbert Xu break; 951894cfbc0SChristoph Hellwig retv = xfrm_user_policy(sk, optname, optval, optlen); 9521da177e4SLinus Torvalds break; 9531da177e4SLinus Torvalds 9547cbca67cSYOSHIFUJI Hideaki case IPV6_ADDR_PREFERENCES: 955b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 956b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 95718d5ad62SChristoph Hellwig retv = __ip6_sock_set_addr_preferences(sk, val); 9587cbca67cSYOSHIFUJI Hideaki break; 959e802af9cSStephen Hemminger case IPV6_MINHOPCOUNT: 960e802af9cSStephen Hemminger if (optlen < sizeof(int)) 961e802af9cSStephen Hemminger goto e_inval; 962e802af9cSStephen Hemminger if (val < 0 || val > 255) 963e802af9cSStephen Hemminger goto e_inval; 964790eb673SEric Dumazet 965790eb673SEric Dumazet if (val) 966790eb673SEric Dumazet static_branch_enable(&ip6_min_hopcount); 967790eb673SEric Dumazet 968cc17c3c8SEric Dumazet /* tcp_v6_err() and tcp_v6_rcv() might read min_hopcount 969cc17c3c8SEric Dumazet * while we are changing it. 970cc17c3c8SEric Dumazet */ 971cc17c3c8SEric Dumazet WRITE_ONCE(np->min_hopcount, val); 972d4596badSHannes Frederic Sowa retv = 0; 973793b1473SBrian Haley break; 974793b1473SBrian Haley case IPV6_DONTFRAG: 975793b1473SBrian Haley np->dontfrag = valbool; 976e802af9cSStephen Hemminger retv = 0; 977e802af9cSStephen Hemminger break; 978cb1ce2efSTom Herbert case IPV6_AUTOFLOWLABEL: 979cb1ce2efSTom Herbert np->autoflowlabel = valbool; 980513674b5SShaohua Li np->autoflowlabel_set = 1; 981cb1ce2efSTom Herbert retv = 0; 982cb1ce2efSTom Herbert break; 9830cc0aa61SWillem de Bruijn case IPV6_RECVFRAGSIZE: 9840cc0aa61SWillem de Bruijn np->rxopt.bits.recvfragsize = valbool; 9850cc0aa61SWillem de Bruijn retv = 0; 9860cc0aa61SWillem de Bruijn break; 98701370434SWillem de Bruijn case IPV6_RECVERR_RFC4884: 98801370434SWillem de Bruijn if (optlen < sizeof(int)) 98901370434SWillem de Bruijn goto e_inval; 99001370434SWillem de Bruijn if (val < 0 || val > 1) 99101370434SWillem de Bruijn goto e_inval; 99201370434SWillem de Bruijn np->recverr_rfc4884 = valbool; 99301370434SWillem de Bruijn retv = 0; 99401370434SWillem de Bruijn break; 9957cbca67cSYOSHIFUJI Hideaki } 9967cbca67cSYOSHIFUJI Hideaki 9971da177e4SLinus Torvalds release_sock(sk); 998baf606d9SMarcelo Ricardo Leitner if (needs_rtnl) 999baf606d9SMarcelo Ricardo Leitner rtnl_unlock(); 10001da177e4SLinus Torvalds 10011da177e4SLinus Torvalds return retv; 10021da177e4SLinus Torvalds 10031da177e4SLinus Torvalds e_inval: 10041da177e4SLinus Torvalds release_sock(sk); 1005baf606d9SMarcelo Ricardo Leitner if (needs_rtnl) 1006baf606d9SMarcelo Ricardo Leitner rtnl_unlock(); 10071da177e4SLinus Torvalds return -EINVAL; 10081da177e4SLinus Torvalds } 10091da177e4SLinus Torvalds 1010a7b75c5aSChristoph Hellwig int ipv6_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval, 1011a7b75c5aSChristoph Hellwig unsigned int optlen) 10123fdadf7dSDmitry Mishin { 10133fdadf7dSDmitry Mishin int err; 10143fdadf7dSDmitry Mishin 10153fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) 10163fdadf7dSDmitry Mishin return udp_prot.setsockopt(sk, level, optname, optval, optlen); 10173fdadf7dSDmitry Mishin 10183fdadf7dSDmitry Mishin if (level != SOL_IPV6) 10193fdadf7dSDmitry Mishin return -ENOPROTOOPT; 10203fdadf7dSDmitry Mishin 1021a7b75c5aSChristoph Hellwig err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); 10223fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 10233fdadf7dSDmitry Mishin /* we need to exclude all possible ENOPROTOOPTs except default case */ 10243fdadf7dSDmitry Mishin if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && 10253f34cfaeSPaolo Abeni optname != IPV6_XFRM_POLICY) 1026a7b75c5aSChristoph Hellwig err = nf_setsockopt(sk, PF_INET6, optname, optval, optlen); 10273fdadf7dSDmitry Mishin #endif 10283fdadf7dSDmitry Mishin return err; 10293fdadf7dSDmitry Mishin } 10307159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_setsockopt); 10313fdadf7dSDmitry Mishin 103228693079SDavid S. Miller static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, 10334c6510a7SYOSHIFUJI Hideaki int optname, char __user *optval, int len) 1034333fad53SYOSHIFUJI Hideaki { 103528693079SDavid S. Miller struct ipv6_opt_hdr *hdr; 103628693079SDavid S. Miller 10374c6510a7SYOSHIFUJI Hideaki if (!opt) 1038333fad53SYOSHIFUJI Hideaki return 0; 10394c6510a7SYOSHIFUJI Hideaki 10404c6510a7SYOSHIFUJI Hideaki switch (optname) { 10414c6510a7SYOSHIFUJI Hideaki case IPV6_HOPOPTS: 104228693079SDavid S. Miller hdr = opt->hopopt; 10434c6510a7SYOSHIFUJI Hideaki break; 10444c6510a7SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 10454c6510a7SYOSHIFUJI Hideaki hdr = opt->dst0opt; 10464c6510a7SYOSHIFUJI Hideaki break; 10474c6510a7SYOSHIFUJI Hideaki case IPV6_RTHDR: 10484c6510a7SYOSHIFUJI Hideaki hdr = (struct ipv6_opt_hdr *)opt->srcrt; 10494c6510a7SYOSHIFUJI Hideaki break; 10504c6510a7SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 10514c6510a7SYOSHIFUJI Hideaki hdr = opt->dst1opt; 10524c6510a7SYOSHIFUJI Hideaki break; 10534c6510a7SYOSHIFUJI Hideaki default: 10544c6510a7SYOSHIFUJI Hideaki return -EINVAL; /* should not happen */ 10554c6510a7SYOSHIFUJI Hideaki } 10564c6510a7SYOSHIFUJI Hideaki 10574c6510a7SYOSHIFUJI Hideaki if (!hdr) 10584c6510a7SYOSHIFUJI Hideaki return 0; 105928693079SDavid S. Miller 1060d2b02ed9SChris Wright len = min_t(unsigned int, len, ipv6_optlen(hdr)); 1061660adc6eSIlpo Järvinen if (copy_to_user(optval, hdr, len)) 1062333fad53SYOSHIFUJI Hideaki return -EFAULT; 106395b496b6SYang Hongyang return len; 1064333fad53SYOSHIFUJI Hideaki } 1065333fad53SYOSHIFUJI Hideaki 1066d5541e85SChristoph Hellwig static int ipv6_get_msfilter(struct sock *sk, void __user *optval, 1067d5541e85SChristoph Hellwig int __user *optlen, int len) 10681da177e4SLinus Torvalds { 1069db243b79SGustavo A. R. Silva const int size0 = offsetof(struct group_filter, gf_slist_flex); 1070d5541e85SChristoph Hellwig struct group_filter __user *p = optval; 1071d5541e85SChristoph Hellwig struct group_filter gsf; 1072931ca7abSAl Viro int num; 10731da177e4SLinus Torvalds int err; 10741da177e4SLinus Torvalds 1075931ca7abSAl Viro if (len < size0) 10761da177e4SLinus Torvalds return -EINVAL; 1077931ca7abSAl Viro if (copy_from_user(&gsf, p, size0)) 10781da177e4SLinus Torvalds return -EFAULT; 107920c61fbdSYOSHIFUJI Hideaki if (gsf.gf_group.ss_family != AF_INET6) 108020c61fbdSYOSHIFUJI Hideaki return -EADDRNOTAVAIL; 1081931ca7abSAl Viro num = gsf.gf_numsrc; 10821da177e4SLinus Torvalds lock_sock(sk); 1083db243b79SGustavo A. R. Silva err = ip6_mc_msfget(sk, &gsf, p->gf_slist_flex); 1084931ca7abSAl Viro if (!err) { 1085931ca7abSAl Viro if (num > gsf.gf_numsrc) 1086931ca7abSAl Viro num = gsf.gf_numsrc; 1087931ca7abSAl Viro if (put_user(GROUP_FILTER_SIZE(num), optlen) || 1088931ca7abSAl Viro copy_to_user(p, &gsf, size0)) 1089931ca7abSAl Viro err = -EFAULT; 1090931ca7abSAl Viro } 10911da177e4SLinus Torvalds release_sock(sk); 10921da177e4SLinus Torvalds return err; 10931da177e4SLinus Torvalds } 10941da177e4SLinus Torvalds 1095d5541e85SChristoph Hellwig static int compat_ipv6_get_msfilter(struct sock *sk, void __user *optval, 1096d5541e85SChristoph Hellwig int __user *optlen) 1097d5541e85SChristoph Hellwig { 1098db243b79SGustavo A. R. Silva const int size0 = offsetof(struct compat_group_filter, gf_slist_flex); 1099d5541e85SChristoph Hellwig struct compat_group_filter __user *p = optval; 1100d5541e85SChristoph Hellwig struct compat_group_filter gf32; 1101d5541e85SChristoph Hellwig struct group_filter gf; 1102d5541e85SChristoph Hellwig int len, err; 1103d5541e85SChristoph Hellwig int num; 1104d5541e85SChristoph Hellwig 1105d5541e85SChristoph Hellwig if (get_user(len, optlen)) 1106d5541e85SChristoph Hellwig return -EFAULT; 1107d5541e85SChristoph Hellwig if (len < size0) 1108d5541e85SChristoph Hellwig return -EINVAL; 1109d5541e85SChristoph Hellwig 1110d5541e85SChristoph Hellwig if (copy_from_user(&gf32, p, size0)) 1111d5541e85SChristoph Hellwig return -EFAULT; 1112d5541e85SChristoph Hellwig gf.gf_interface = gf32.gf_interface; 1113d5541e85SChristoph Hellwig gf.gf_fmode = gf32.gf_fmode; 1114d5541e85SChristoph Hellwig num = gf.gf_numsrc = gf32.gf_numsrc; 1115d5541e85SChristoph Hellwig gf.gf_group = gf32.gf_group; 1116d5541e85SChristoph Hellwig 1117d5541e85SChristoph Hellwig if (gf.gf_group.ss_family != AF_INET6) 1118d5541e85SChristoph Hellwig return -EADDRNOTAVAIL; 1119d5541e85SChristoph Hellwig 1120d5541e85SChristoph Hellwig lock_sock(sk); 1121db243b79SGustavo A. R. Silva err = ip6_mc_msfget(sk, &gf, p->gf_slist_flex); 1122d5541e85SChristoph Hellwig release_sock(sk); 1123d5541e85SChristoph Hellwig if (err) 1124d5541e85SChristoph Hellwig return err; 1125d5541e85SChristoph Hellwig if (num > gf.gf_numsrc) 1126d5541e85SChristoph Hellwig num = gf.gf_numsrc; 1127d5541e85SChristoph Hellwig len = GROUP_FILTER_SIZE(num) - (sizeof(gf)-sizeof(gf32)); 1128d5541e85SChristoph Hellwig if (put_user(len, optlen) || 1129d5541e85SChristoph Hellwig put_user(gf.gf_fmode, &p->gf_fmode) || 1130d5541e85SChristoph Hellwig put_user(gf.gf_numsrc, &p->gf_numsrc)) 1131d5541e85SChristoph Hellwig return -EFAULT; 1132d5541e85SChristoph Hellwig return 0; 1133d5541e85SChristoph Hellwig } 1134d5541e85SChristoph Hellwig 1135d5541e85SChristoph Hellwig static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, 1136d5541e85SChristoph Hellwig char __user *optval, int __user *optlen, unsigned int flags) 1137d5541e85SChristoph Hellwig { 1138d5541e85SChristoph Hellwig struct ipv6_pinfo *np = inet6_sk(sk); 1139d5541e85SChristoph Hellwig int len; 1140d5541e85SChristoph Hellwig int val; 1141d5541e85SChristoph Hellwig 1142d5541e85SChristoph Hellwig if (ip6_mroute_opt(optname)) 1143d5541e85SChristoph Hellwig return ip6_mroute_getsockopt(sk, optname, optval, optlen); 1144d5541e85SChristoph Hellwig 1145d5541e85SChristoph Hellwig if (get_user(len, optlen)) 1146d5541e85SChristoph Hellwig return -EFAULT; 1147d5541e85SChristoph Hellwig switch (optname) { 1148d5541e85SChristoph Hellwig case IPV6_ADDRFORM: 1149d5541e85SChristoph Hellwig if (sk->sk_protocol != IPPROTO_UDP && 1150d5541e85SChristoph Hellwig sk->sk_protocol != IPPROTO_UDPLITE && 1151d5541e85SChristoph Hellwig sk->sk_protocol != IPPROTO_TCP) 1152d5541e85SChristoph Hellwig return -ENOPROTOOPT; 1153d5541e85SChristoph Hellwig if (sk->sk_state != TCP_ESTABLISHED) 1154d5541e85SChristoph Hellwig return -ENOTCONN; 1155d5541e85SChristoph Hellwig val = sk->sk_family; 1156d5541e85SChristoph Hellwig break; 1157d5541e85SChristoph Hellwig case MCAST_MSFILTER: 11583021ad52SChristoph Hellwig if (in_compat_syscall()) 11593021ad52SChristoph Hellwig return compat_ipv6_get_msfilter(sk, optval, optlen); 1160d5541e85SChristoph Hellwig return ipv6_get_msfilter(sk, optval, optlen, len); 1161333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTOPTIONS: 11621da177e4SLinus Torvalds { 11631da177e4SLinus Torvalds struct msghdr msg; 11641da177e4SLinus Torvalds struct sk_buff *skb; 11651da177e4SLinus Torvalds 11661da177e4SLinus Torvalds if (sk->sk_type != SOCK_STREAM) 11671da177e4SLinus Torvalds return -ENOPROTOOPT; 11681da177e4SLinus Torvalds 11699e39394fSLukas Bulwahn msg.msg_control_user = optval; 11701da177e4SLinus Torvalds msg.msg_controllen = len; 117198e77438SDaniel Baluta msg.msg_flags = flags; 11721b2f08dfSChristoph Hellwig msg.msg_control_is_user = true; 11731da177e4SLinus Torvalds 11741da177e4SLinus Torvalds lock_sock(sk); 11751da177e4SLinus Torvalds skb = np->pktoptions; 11761da177e4SLinus Torvalds if (skb) 11774b261c75SHannes Frederic Sowa ip6_datagram_recv_ctl(sk, &msg, skb); 11781dc7b90fSEric Dumazet release_sock(sk); 11791dc7b90fSEric Dumazet if (!skb) { 11801da177e4SLinus Torvalds if (np->rxopt.bits.rxinfo) { 11811da177e4SLinus Torvalds struct in6_pktinfo src_info; 1182f250dcdaSYang Hongyang src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : 1183f250dcdaSYang Hongyang np->sticky_pktinfo.ipi6_ifindex; 1184efe4208fSEric Dumazet src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : np->sticky_pktinfo.ipi6_addr; 11851da177e4SLinus Torvalds put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); 11861da177e4SLinus Torvalds } 11871da177e4SLinus Torvalds if (np->rxopt.bits.rxhlim) { 11881da177e4SLinus Torvalds int hlim = np->mcast_hops; 11891da177e4SLinus Torvalds put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); 11901da177e4SLinus Torvalds } 11914c507d28SJiri Benc if (np->rxopt.bits.rxtclass) { 1192d76ed22bSLi RongQing int tclass = (int)ip6_tclass(np->rcv_flowinfo); 1193d76ed22bSLi RongQing 11944c507d28SJiri Benc put_cmsg(&msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass); 11954c507d28SJiri Benc } 1196333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxoinfo) { 1197333fad53SYOSHIFUJI Hideaki struct in6_pktinfo src_info; 1198f250dcdaSYang Hongyang src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : 1199f250dcdaSYang Hongyang np->sticky_pktinfo.ipi6_ifindex; 1200efe4208fSEric Dumazet src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : 1201efe4208fSEric Dumazet np->sticky_pktinfo.ipi6_addr; 1202333fad53SYOSHIFUJI Hideaki put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); 1203333fad53SYOSHIFUJI Hideaki } 1204333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxohlim) { 1205333fad53SYOSHIFUJI Hideaki int hlim = np->mcast_hops; 1206333fad53SYOSHIFUJI Hideaki put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); 1207333fad53SYOSHIFUJI Hideaki } 12081397ed35SFlorent Fourcot if (np->rxopt.bits.rxflow) { 120968536053SFlorent Fourcot __be32 flowinfo = np->rcv_flowinfo; 121068536053SFlorent Fourcot 12111397ed35SFlorent Fourcot put_cmsg(&msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo); 12121397ed35SFlorent Fourcot } 12131da177e4SLinus Torvalds } 12141da177e4SLinus Torvalds len -= msg.msg_controllen; 12151da177e4SLinus Torvalds return put_user(len, optlen); 12161da177e4SLinus Torvalds } 12171da177e4SLinus Torvalds case IPV6_MTU: 12181da177e4SLinus Torvalds { 12191da177e4SLinus Torvalds struct dst_entry *dst; 1220b6c6712aSEric Dumazet 12211da177e4SLinus Torvalds val = 0; 1222b6c6712aSEric Dumazet rcu_read_lock(); 1223b6c6712aSEric Dumazet dst = __sk_dst_get(sk); 1224b6c6712aSEric Dumazet if (dst) 12251da177e4SLinus Torvalds val = dst_mtu(dst); 1226b6c6712aSEric Dumazet rcu_read_unlock(); 12271da177e4SLinus Torvalds if (!val) 12281da177e4SLinus Torvalds return -ENOTCONN; 12291da177e4SLinus Torvalds break; 12301da177e4SLinus Torvalds } 12311da177e4SLinus Torvalds 12321da177e4SLinus Torvalds case IPV6_V6ONLY: 12339fe516baSEric Dumazet val = sk->sk_ipv6only; 12341da177e4SLinus Torvalds break; 12351da177e4SLinus Torvalds 1236333fad53SYOSHIFUJI Hideaki case IPV6_RECVPKTINFO: 12371da177e4SLinus Torvalds val = np->rxopt.bits.rxinfo; 12381da177e4SLinus Torvalds break; 12391da177e4SLinus Torvalds 1240333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 1241333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.rxoinfo; 1242333fad53SYOSHIFUJI Hideaki break; 1243333fad53SYOSHIFUJI Hideaki 1244333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPLIMIT: 12451da177e4SLinus Torvalds val = np->rxopt.bits.rxhlim; 12461da177e4SLinus Torvalds break; 12471da177e4SLinus Torvalds 1248333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 1249333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.rxohlim; 1250333fad53SYOSHIFUJI Hideaki break; 1251333fad53SYOSHIFUJI Hideaki 1252333fad53SYOSHIFUJI Hideaki case IPV6_RECVRTHDR: 12531da177e4SLinus Torvalds val = np->rxopt.bits.srcrt; 12541da177e4SLinus Torvalds break; 12551da177e4SLinus Torvalds 1256333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 1257333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.osrcrt; 1258333fad53SYOSHIFUJI Hideaki break; 1259333fad53SYOSHIFUJI Hideaki 12601da177e4SLinus Torvalds case IPV6_HOPOPTS: 1261333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 1262333fad53SYOSHIFUJI Hideaki case IPV6_RTHDR: 1263333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 1264333fad53SYOSHIFUJI Hideaki { 126545f6fad8SEric Dumazet struct ipv6_txoptions *opt; 1266333fad53SYOSHIFUJI Hideaki 1267333fad53SYOSHIFUJI Hideaki lock_sock(sk); 12681e1d04e6SHannes Frederic Sowa opt = rcu_dereference_protected(np->opt, 12691e1d04e6SHannes Frederic Sowa lockdep_sock_is_held(sk)); 127045f6fad8SEric Dumazet len = ipv6_getsockopt_sticky(sk, opt, optname, optval, len); 1271333fad53SYOSHIFUJI Hideaki release_sock(sk); 127205335c22SYang Hongyang /* check if ipv6_getsockopt_sticky() returns err code */ 127305335c22SYang Hongyang if (len < 0) 127405335c22SYang Hongyang return len; 1275333fad53SYOSHIFUJI Hideaki return put_user(len, optlen); 1276333fad53SYOSHIFUJI Hideaki } 1277333fad53SYOSHIFUJI Hideaki 1278333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPOPTS: 12791da177e4SLinus Torvalds val = np->rxopt.bits.hopopts; 12801da177e4SLinus Torvalds break; 12811da177e4SLinus Torvalds 1282333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 1283333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.ohopopts; 1284333fad53SYOSHIFUJI Hideaki break; 1285333fad53SYOSHIFUJI Hideaki 1286333fad53SYOSHIFUJI Hideaki case IPV6_RECVDSTOPTS: 12871da177e4SLinus Torvalds val = np->rxopt.bits.dstopts; 12881da177e4SLinus Torvalds break; 12891da177e4SLinus Torvalds 1290333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 1291333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.odstopts; 1292333fad53SYOSHIFUJI Hideaki break; 1293333fad53SYOSHIFUJI Hideaki 129441a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 129541a1f8eaSYOSHIFUJI Hideaki val = np->tclass; 129641a1f8eaSYOSHIFUJI Hideaki break; 129741a1f8eaSYOSHIFUJI Hideaki 129841a1f8eaSYOSHIFUJI Hideaki case IPV6_RECVTCLASS: 129941a1f8eaSYOSHIFUJI Hideaki val = np->rxopt.bits.rxtclass; 130041a1f8eaSYOSHIFUJI Hideaki break; 130141a1f8eaSYOSHIFUJI Hideaki 13021da177e4SLinus Torvalds case IPV6_FLOWINFO: 13031da177e4SLinus Torvalds val = np->rxopt.bits.rxflow; 13041da177e4SLinus Torvalds break; 13051da177e4SLinus Torvalds 1306793b1473SBrian Haley case IPV6_RECVPATHMTU: 1307793b1473SBrian Haley val = np->rxopt.bits.rxpmtu; 1308793b1473SBrian Haley break; 1309793b1473SBrian Haley 1310793b1473SBrian Haley case IPV6_PATHMTU: 1311793b1473SBrian Haley { 1312793b1473SBrian Haley struct dst_entry *dst; 1313793b1473SBrian Haley struct ip6_mtuinfo mtuinfo; 1314793b1473SBrian Haley 1315793b1473SBrian Haley if (len < sizeof(mtuinfo)) 1316793b1473SBrian Haley return -EINVAL; 1317793b1473SBrian Haley 1318793b1473SBrian Haley len = sizeof(mtuinfo); 1319793b1473SBrian Haley memset(&mtuinfo, 0, sizeof(mtuinfo)); 1320793b1473SBrian Haley 1321793b1473SBrian Haley rcu_read_lock(); 1322793b1473SBrian Haley dst = __sk_dst_get(sk); 1323793b1473SBrian Haley if (dst) 1324793b1473SBrian Haley mtuinfo.ip6m_mtu = dst_mtu(dst); 1325793b1473SBrian Haley rcu_read_unlock(); 1326793b1473SBrian Haley if (!mtuinfo.ip6m_mtu) 1327793b1473SBrian Haley return -ENOTCONN; 1328793b1473SBrian Haley 1329793b1473SBrian Haley if (put_user(len, optlen)) 1330793b1473SBrian Haley return -EFAULT; 1331793b1473SBrian Haley if (copy_to_user(optval, &mtuinfo, len)) 1332793b1473SBrian Haley return -EFAULT; 1333793b1473SBrian Haley 1334793b1473SBrian Haley return 0; 1335793b1473SBrian Haley } 1336793b1473SBrian Haley 13376c468622SBalazs Scheidler case IPV6_TRANSPARENT: 13386c468622SBalazs Scheidler val = inet_sk(sk)->transparent; 13396c468622SBalazs Scheidler break; 13406c468622SBalazs Scheidler 134184e14fe3SMaciej Żenczykowski case IPV6_FREEBIND: 134284e14fe3SMaciej Żenczykowski val = inet_sk(sk)->freebind; 134384e14fe3SMaciej Żenczykowski break; 134484e14fe3SMaciej Żenczykowski 13456c468622SBalazs Scheidler case IPV6_RECVORIGDSTADDR: 13466c468622SBalazs Scheidler val = np->rxopt.bits.rxorigdstaddr; 13476c468622SBalazs Scheidler break; 13486c468622SBalazs Scheidler 13491da177e4SLinus Torvalds case IPV6_UNICAST_HOPS: 13501da177e4SLinus Torvalds case IPV6_MULTICAST_HOPS: 1351befffe90SBrian Haley { 1352befffe90SBrian Haley struct dst_entry *dst; 1353befffe90SBrian Haley 1354befffe90SBrian Haley if (optname == IPV6_UNICAST_HOPS) 1355befffe90SBrian Haley val = np->hop_limit; 1356befffe90SBrian Haley else 13571da177e4SLinus Torvalds val = np->mcast_hops; 1358befffe90SBrian Haley 1359b6c6712aSEric Dumazet if (val < 0) { 1360b6c6712aSEric Dumazet rcu_read_lock(); 1361b6c6712aSEric Dumazet dst = __sk_dst_get(sk); 1362b6c6712aSEric Dumazet if (dst) 13636b75d090SYOSHIFUJI Hideaki val = ip6_dst_hoplimit(dst); 1364b6c6712aSEric Dumazet rcu_read_unlock(); 1365befffe90SBrian Haley } 1366b6c6712aSEric Dumazet 1367befffe90SBrian Haley if (val < 0) 136853b7997fSYOSHIFUJI Hideaki val = sock_net(sk)->ipv6.devconf_all->hop_limit; 13691da177e4SLinus Torvalds break; 1370befffe90SBrian Haley } 13711da177e4SLinus Torvalds 13721da177e4SLinus Torvalds case IPV6_MULTICAST_LOOP: 13731da177e4SLinus Torvalds val = np->mc_loop; 13741da177e4SLinus Torvalds break; 13751da177e4SLinus Torvalds 13761da177e4SLinus Torvalds case IPV6_MULTICAST_IF: 13771da177e4SLinus Torvalds val = np->mcast_oif; 13781da177e4SLinus Torvalds break; 13791da177e4SLinus Torvalds 138015033f04SAndre Naujoks case IPV6_MULTICAST_ALL: 138115033f04SAndre Naujoks val = np->mc_all; 138215033f04SAndre Naujoks break; 138315033f04SAndre Naujoks 1384c4062dfcSErich E. Hoover case IPV6_UNICAST_IF: 1385c4062dfcSErich E. Hoover val = (__force int)htonl((__u32) np->ucast_oif); 1386c4062dfcSErich E. Hoover break; 1387c4062dfcSErich E. Hoover 13881da177e4SLinus Torvalds case IPV6_MTU_DISCOVER: 13891da177e4SLinus Torvalds val = np->pmtudisc; 13901da177e4SLinus Torvalds break; 13911da177e4SLinus Torvalds 13921da177e4SLinus Torvalds case IPV6_RECVERR: 13931da177e4SLinus Torvalds val = np->recverr; 13941da177e4SLinus Torvalds break; 13951da177e4SLinus Torvalds 13961da177e4SLinus Torvalds case IPV6_FLOWINFO_SEND: 13971da177e4SLinus Torvalds val = np->sndflow; 13981da177e4SLinus Torvalds break; 13991da177e4SLinus Torvalds 14003fdfa5ffSFlorent Fourcot case IPV6_FLOWLABEL_MGR: 14013fdfa5ffSFlorent Fourcot { 14023fdfa5ffSFlorent Fourcot struct in6_flowlabel_req freq; 140346e5f401SFlorent Fourcot int flags; 14043fdfa5ffSFlorent Fourcot 14053fdfa5ffSFlorent Fourcot if (len < sizeof(freq)) 14063fdfa5ffSFlorent Fourcot return -EINVAL; 14073fdfa5ffSFlorent Fourcot 14083fdfa5ffSFlorent Fourcot if (copy_from_user(&freq, optval, sizeof(freq))) 14093fdfa5ffSFlorent Fourcot return -EFAULT; 14103fdfa5ffSFlorent Fourcot 14113fdfa5ffSFlorent Fourcot if (freq.flr_action != IPV6_FL_A_GET) 14123fdfa5ffSFlorent Fourcot return -EINVAL; 14133fdfa5ffSFlorent Fourcot 14143fdfa5ffSFlorent Fourcot len = sizeof(freq); 141546e5f401SFlorent Fourcot flags = freq.flr_flags; 141646e5f401SFlorent Fourcot 14173fdfa5ffSFlorent Fourcot memset(&freq, 0, sizeof(freq)); 14183fdfa5ffSFlorent Fourcot 141946e5f401SFlorent Fourcot val = ipv6_flowlabel_opt_get(sk, &freq, flags); 14203fdfa5ffSFlorent Fourcot if (val < 0) 14213fdfa5ffSFlorent Fourcot return val; 14223fdfa5ffSFlorent Fourcot 14233fdfa5ffSFlorent Fourcot if (put_user(len, optlen)) 14243fdfa5ffSFlorent Fourcot return -EFAULT; 14253fdfa5ffSFlorent Fourcot if (copy_to_user(optval, &freq, len)) 14263fdfa5ffSFlorent Fourcot return -EFAULT; 14273fdfa5ffSFlorent Fourcot 14283fdfa5ffSFlorent Fourcot return 0; 14293fdfa5ffSFlorent Fourcot } 14303fdfa5ffSFlorent Fourcot 14317cbca67cSYOSHIFUJI Hideaki case IPV6_ADDR_PREFERENCES: 14327cbca67cSYOSHIFUJI Hideaki val = 0; 14337cbca67cSYOSHIFUJI Hideaki 14347cbca67cSYOSHIFUJI Hideaki if (np->srcprefs & IPV6_PREFER_SRC_TMP) 14357cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_TMP; 14367cbca67cSYOSHIFUJI Hideaki else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) 14377cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_PUBLIC; 14387cbca67cSYOSHIFUJI Hideaki else { 14397cbca67cSYOSHIFUJI Hideaki /* XXX: should we return system default? */ 14407cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; 14417cbca67cSYOSHIFUJI Hideaki } 14427cbca67cSYOSHIFUJI Hideaki 14437cbca67cSYOSHIFUJI Hideaki if (np->srcprefs & IPV6_PREFER_SRC_COA) 14447cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_COA; 14457cbca67cSYOSHIFUJI Hideaki else 14467cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_HOME; 14477cbca67cSYOSHIFUJI Hideaki break; 14487cbca67cSYOSHIFUJI Hideaki 1449e802af9cSStephen Hemminger case IPV6_MINHOPCOUNT: 1450e802af9cSStephen Hemminger val = np->min_hopcount; 1451e802af9cSStephen Hemminger break; 1452e802af9cSStephen Hemminger 1453793b1473SBrian Haley case IPV6_DONTFRAG: 1454793b1473SBrian Haley val = np->dontfrag; 1455793b1473SBrian Haley break; 1456793b1473SBrian Haley 1457cb1ce2efSTom Herbert case IPV6_AUTOFLOWLABEL: 1458e9191ffbSBen Hutchings val = ip6_autoflowlabel(sock_net(sk), np); 1459cb1ce2efSTom Herbert break; 1460cb1ce2efSTom Herbert 14610cc0aa61SWillem de Bruijn case IPV6_RECVFRAGSIZE: 14620cc0aa61SWillem de Bruijn val = np->rxopt.bits.recvfragsize; 14630cc0aa61SWillem de Bruijn break; 14640cc0aa61SWillem de Bruijn 14659036b2feSFrancesco Ruggeri case IPV6_ROUTER_ALERT_ISOLATE: 14669036b2feSFrancesco Ruggeri val = np->rtalert_isolate; 14679036b2feSFrancesco Ruggeri break; 14689036b2feSFrancesco Ruggeri 146901370434SWillem de Bruijn case IPV6_RECVERR_RFC4884: 147001370434SWillem de Bruijn val = np->recverr_rfc4884; 147101370434SWillem de Bruijn break; 147201370434SWillem de Bruijn 14731da177e4SLinus Torvalds default: 1474cf6fc4a9SWei Yongjun return -ENOPROTOOPT; 14751da177e4SLinus Torvalds } 14761da177e4SLinus Torvalds len = min_t(unsigned int, sizeof(int), len); 14771da177e4SLinus Torvalds if (put_user(len, optlen)) 14781da177e4SLinus Torvalds return -EFAULT; 14791da177e4SLinus Torvalds if (copy_to_user(optval, &val, len)) 14801da177e4SLinus Torvalds return -EFAULT; 14811da177e4SLinus Torvalds return 0; 14821da177e4SLinus Torvalds } 14831da177e4SLinus Torvalds 14843fdadf7dSDmitry Mishin int ipv6_getsockopt(struct sock *sk, int level, int optname, 14853fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 14863fdadf7dSDmitry Mishin { 14873fdadf7dSDmitry Mishin int err; 14883fdadf7dSDmitry Mishin 14893fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) 14903fdadf7dSDmitry Mishin return udp_prot.getsockopt(sk, level, optname, optval, optlen); 14913fdadf7dSDmitry Mishin 14923fdadf7dSDmitry Mishin if (level != SOL_IPV6) 14933fdadf7dSDmitry Mishin return -ENOPROTOOPT; 14943fdadf7dSDmitry Mishin 149598e77438SDaniel Baluta err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 0); 14963fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 1497cf6fc4a9SWei Yongjun /* we need to exclude all possible ENOPROTOOPTs except default case */ 1498cf6fc4a9SWei Yongjun if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { 14993fdadf7dSDmitry Mishin int len; 15003fdadf7dSDmitry Mishin 15013fdadf7dSDmitry Mishin if (get_user(len, optlen)) 15023fdadf7dSDmitry Mishin return -EFAULT; 15033fdadf7dSDmitry Mishin 150401ea306fSPaolo Abeni err = nf_getsockopt(sk, PF_INET6, optname, optval, &len); 15053fdadf7dSDmitry Mishin if (err >= 0) 15063fdadf7dSDmitry Mishin err = put_user(len, optlen); 15073fdadf7dSDmitry Mishin } 15083fdadf7dSDmitry Mishin #endif 15093fdadf7dSDmitry Mishin return err; 15103fdadf7dSDmitry Mishin } 15117159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_getsockopt); 1512