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; 2137de6d09fSKuniyuki Iwashima if (optlen > READ_ONCE(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; 2477de6d09fSKuniyuki Iwashima if (optlen > READ_ONCE(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 */ 33040cd308eSMartin KaFai Lau if (optname != IPV6_RTHDR && !sockopt_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 39475b64b68SMartin KaFai Lau 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(); 42040cd308eSMartin KaFai Lau sockopt_lock_sock(sk); 4211da177e4SLinus Torvalds 4223c52c6bbSKuniyuki Iwashima /* Another thread has converted the socket into IPv4 with 4233c52c6bbSKuniyuki Iwashima * IPV6_ADDRFORM concurrently. 4243c52c6bbSKuniyuki Iwashima */ 4253c52c6bbSKuniyuki Iwashima if (unlikely(sk->sk_family != AF_INET6)) 4263c52c6bbSKuniyuki Iwashima goto unlock; 4273c52c6bbSKuniyuki Iwashima 4281da177e4SLinus Torvalds switch (optname) { 4291da177e4SLinus Torvalds 4301da177e4SLinus Torvalds case IPV6_ADDRFORM: 431b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 432b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 4331da177e4SLinus Torvalds if (val == PF_INET) { 43449d074f4SDenis V. Lunev if (sk->sk_type == SOCK_RAW) 43549d074f4SDenis V. Lunev break; 43649d074f4SDenis V. Lunev 4379596cc82SDenis V. Lunev if (sk->sk_protocol == IPPROTO_UDP || 4389596cc82SDenis V. Lunev sk->sk_protocol == IPPROTO_UDPLITE) { 4399596cc82SDenis V. Lunev struct udp_sock *up = udp_sk(sk); 4409596cc82SDenis V. Lunev if (up->pending == AF_INET6) { 4419596cc82SDenis V. Lunev retv = -EBUSY; 4429596cc82SDenis V. Lunev break; 4439596cc82SDenis V. Lunev } 44479a1f0ccSHangbin Liu } else if (sk->sk_protocol == IPPROTO_TCP) { 44579a1f0ccSHangbin Liu if (sk->sk_prot != &tcpv6_prot) { 446b6f61189SEric Dumazet retv = -EBUSY; 4471da177e4SLinus Torvalds break; 448b6f61189SEric Dumazet } 44979a1f0ccSHangbin Liu } else { 450b6f61189SEric Dumazet break; 45179a1f0ccSHangbin Liu } 45279a1f0ccSHangbin Liu 4531da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) { 4541da177e4SLinus Torvalds retv = -ENOTCONN; 4551da177e4SLinus Torvalds break; 4561da177e4SLinus Torvalds } 4571da177e4SLinus Torvalds 4581da177e4SLinus Torvalds if (ipv6_only_sock(sk) || 459efe4208fSEric Dumazet !ipv6_addr_v4mapped(&sk->sk_v6_daddr)) { 4601da177e4SLinus Torvalds retv = -EADDRNOTAVAIL; 4611da177e4SLinus Torvalds break; 4621da177e4SLinus Torvalds } 4631da177e4SLinus Torvalds 4648651be8fSWANG Cong __ipv6_sock_mc_close(sk); 4658c0de6e9SCong Wang __ipv6_sock_ac_close(sk); 4661da177e4SLinus Torvalds 467e6848976SArnaldo Carvalho de Melo /* 468e6848976SArnaldo Carvalho de Melo * Sock is moving from IPv6 to IPv4 (sk_prot), so 469e6848976SArnaldo Carvalho de Melo * remove it from the refcnt debug socks count in the 470e6848976SArnaldo Carvalho de Melo * original family... 471e6848976SArnaldo Carvalho de Melo */ 472e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_dec(sk); 473e6848976SArnaldo Carvalho de Melo 4741da177e4SLinus Torvalds if (sk->sk_protocol == IPPROTO_TCP) { 475d83d8461SArnaldo Carvalho de Melo struct inet_connection_sock *icsk = inet_csk(sk); 476b3cb764aSEric Dumazet 477c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, sk->sk_prot, -1); 478c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, &tcp_prot, 1); 479b3cb764aSEric Dumazet 480364f997bSKuniyuki Iwashima /* Paired with READ_ONCE(sk->sk_prot) in inet6_stream_ops */ 481086d4905SEric Dumazet WRITE_ONCE(sk->sk_prot, &tcp_prot); 482f49cd2f4SKuniyuki Iwashima /* Paired with READ_ONCE() in tcp_(get|set)sockopt() */ 483f49cd2f4SKuniyuki Iwashima WRITE_ONCE(icsk->icsk_af_ops, &ipv4_specific); 4841da177e4SLinus Torvalds sk->sk_socket->ops = &inet_stream_ops; 4851da177e4SLinus Torvalds sk->sk_family = PF_INET; 486d83d8461SArnaldo Carvalho de Melo tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); 4871da177e4SLinus Torvalds } else { 488ba4e58ecSGerrit Renker struct proto *prot = &udp_prot; 489ba4e58ecSGerrit Renker 490db8dac20SDavid S. Miller if (sk->sk_protocol == IPPROTO_UDPLITE) 491ba4e58ecSGerrit Renker prot = &udplite_prot; 492b3cb764aSEric Dumazet 493c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, sk->sk_prot, -1); 494c29a0bc4SPavel Emelyanov sock_prot_inuse_add(net, prot, 1); 495b3cb764aSEric Dumazet 496364f997bSKuniyuki Iwashima /* Paired with READ_ONCE(sk->sk_prot) in inet6_dgram_ops */ 497086d4905SEric Dumazet WRITE_ONCE(sk->sk_prot, prot); 4981da177e4SLinus Torvalds sk->sk_socket->ops = &inet_dgram_ops; 4991da177e4SLinus Torvalds sk->sk_family = PF_INET; 5001da177e4SLinus Torvalds } 50121985f43SKuniyuki Iwashima 50221985f43SKuniyuki Iwashima /* Disable all options not to allocate memory anymore, 50321985f43SKuniyuki Iwashima * but there is still a race. See the lockless path 50421985f43SKuniyuki Iwashima * in udpv6_sendmsg() and ipv6_local_rxpmtu(). 50521985f43SKuniyuki Iwashima */ 50621985f43SKuniyuki Iwashima np->rxopt.all = 0; 50721985f43SKuniyuki Iwashima 50821985f43SKuniyuki Iwashima inet6_cleanup_sock(sk); 5091da177e4SLinus Torvalds 510e6848976SArnaldo Carvalho de Melo /* 511e6848976SArnaldo Carvalho de Melo * ... and add it to the refcnt debug socks count 512e6848976SArnaldo Carvalho de Melo * in the new family. -acme 513e6848976SArnaldo Carvalho de Melo */ 514e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_inc(sk); 5151da177e4SLinus Torvalds module_put(THIS_MODULE); 5161da177e4SLinus Torvalds retv = 0; 5171da177e4SLinus Torvalds break; 5181da177e4SLinus Torvalds } 5191da177e4SLinus Torvalds goto e_inval; 5201da177e4SLinus Torvalds 5211da177e4SLinus Torvalds case IPV6_V6ONLY: 522b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int) || 523c720c7e8SEric Dumazet inet_sk(sk)->inet_num) 5241da177e4SLinus Torvalds goto e_inval; 5259fe516baSEric Dumazet sk->sk_ipv6only = valbool; 5261da177e4SLinus Torvalds retv = 0; 5271da177e4SLinus Torvalds break; 5281da177e4SLinus Torvalds 529333fad53SYOSHIFUJI Hideaki case IPV6_RECVPKTINFO: 530b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 531b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 5321da177e4SLinus Torvalds np->rxopt.bits.rxinfo = valbool; 5331da177e4SLinus Torvalds retv = 0; 5341da177e4SLinus Torvalds break; 5351da177e4SLinus Torvalds 536333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 537b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 538b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 539333fad53SYOSHIFUJI Hideaki np->rxopt.bits.rxoinfo = valbool; 540333fad53SYOSHIFUJI Hideaki retv = 0; 541333fad53SYOSHIFUJI Hideaki break; 542333fad53SYOSHIFUJI Hideaki 543333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPLIMIT: 544b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 545b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 5461da177e4SLinus Torvalds np->rxopt.bits.rxhlim = valbool; 5471da177e4SLinus Torvalds retv = 0; 5481da177e4SLinus Torvalds break; 5491da177e4SLinus Torvalds 550333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 551b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 552b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 553333fad53SYOSHIFUJI Hideaki np->rxopt.bits.rxohlim = valbool; 554333fad53SYOSHIFUJI Hideaki retv = 0; 555333fad53SYOSHIFUJI Hideaki break; 556333fad53SYOSHIFUJI Hideaki 557333fad53SYOSHIFUJI Hideaki case IPV6_RECVRTHDR: 558b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 559b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 5604c752098SYOSHIFUJI Hideaki np->rxopt.bits.srcrt = valbool; 5611da177e4SLinus Torvalds retv = 0; 5621da177e4SLinus Torvalds break; 5631da177e4SLinus Torvalds 564333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 565b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 566b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 5674c752098SYOSHIFUJI Hideaki np->rxopt.bits.osrcrt = valbool; 568333fad53SYOSHIFUJI Hideaki retv = 0; 569333fad53SYOSHIFUJI Hideaki break; 570333fad53SYOSHIFUJI Hideaki 571333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPOPTS: 572b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 573b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 5741da177e4SLinus Torvalds np->rxopt.bits.hopopts = valbool; 5751da177e4SLinus Torvalds retv = 0; 5761da177e4SLinus Torvalds break; 5771da177e4SLinus Torvalds 578333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 579b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 580b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 581333fad53SYOSHIFUJI Hideaki np->rxopt.bits.ohopopts = valbool; 582333fad53SYOSHIFUJI Hideaki retv = 0; 583333fad53SYOSHIFUJI Hideaki break; 584333fad53SYOSHIFUJI Hideaki 585333fad53SYOSHIFUJI Hideaki case IPV6_RECVDSTOPTS: 586b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 587b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 5881da177e4SLinus Torvalds np->rxopt.bits.dstopts = valbool; 5891da177e4SLinus Torvalds retv = 0; 5901da177e4SLinus Torvalds break; 5911da177e4SLinus Torvalds 592333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 593b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 594b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 595333fad53SYOSHIFUJI Hideaki np->rxopt.bits.odstopts = valbool; 596333fad53SYOSHIFUJI Hideaki retv = 0; 597333fad53SYOSHIFUJI Hideaki break; 598333fad53SYOSHIFUJI Hideaki 59941a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 600b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 601b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 602d0ee011fSRemi Denis-Courmont if (val < -1 || val > 0xff) 60341a1f8eaSYOSHIFUJI Hideaki goto e_inval; 60426ced1e4SGerrit Renker /* RFC 3542, 6.5: default traffic class of 0x0 */ 60526ced1e4SGerrit Renker if (val == -1) 60626ced1e4SGerrit Renker val = 0; 6079f7b3a69SMaciej Żenczykowski if (sk->sk_type == SOCK_STREAM) { 6089f7b3a69SMaciej Żenczykowski val &= ~INET_ECN_MASK; 6099f7b3a69SMaciej Żenczykowski val |= np->tclass & INET_ECN_MASK; 6109f7b3a69SMaciej Żenczykowski } 611305e95bbSMaciej Żenczykowski if (np->tclass != val) { 61241a1f8eaSYOSHIFUJI Hideaki np->tclass = val; 613305e95bbSMaciej Żenczykowski sk_dst_reset(sk); 614305e95bbSMaciej Żenczykowski } 61541a1f8eaSYOSHIFUJI Hideaki retv = 0; 61641a1f8eaSYOSHIFUJI Hideaki break; 61741a1f8eaSYOSHIFUJI Hideaki 61841a1f8eaSYOSHIFUJI Hideaki case IPV6_RECVTCLASS: 619b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 620b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 62141a1f8eaSYOSHIFUJI Hideaki np->rxopt.bits.rxtclass = valbool; 62241a1f8eaSYOSHIFUJI Hideaki retv = 0; 62341a1f8eaSYOSHIFUJI Hideaki break; 62441a1f8eaSYOSHIFUJI Hideaki 6251da177e4SLinus Torvalds case IPV6_FLOWINFO: 626b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 627b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 6281da177e4SLinus Torvalds np->rxopt.bits.rxflow = valbool; 6291da177e4SLinus Torvalds retv = 0; 6301da177e4SLinus Torvalds break; 6311da177e4SLinus Torvalds 632793b1473SBrian Haley case IPV6_RECVPATHMTU: 633793b1473SBrian Haley if (optlen < sizeof(int)) 634793b1473SBrian Haley goto e_inval; 635793b1473SBrian Haley np->rxopt.bits.rxpmtu = valbool; 636793b1473SBrian Haley retv = 0; 637793b1473SBrian Haley break; 638793b1473SBrian Haley 6396c468622SBalazs Scheidler case IPV6_TRANSPARENT: 64040cd308eSMartin KaFai Lau if (valbool && !sockopt_ns_capable(net->user_ns, CAP_NET_RAW) && 64140cd308eSMartin KaFai Lau !sockopt_ns_capable(net->user_ns, CAP_NET_ADMIN)) { 642b889416bSBalazs Scheidler retv = -EPERM; 643b889416bSBalazs Scheidler break; 644b889416bSBalazs Scheidler } 6456c468622SBalazs Scheidler if (optlen < sizeof(int)) 6466c468622SBalazs Scheidler goto e_inval; 6476c468622SBalazs Scheidler /* we don't have a separate transparent bit for IPV6 we use the one in the IPv4 socket */ 6486c468622SBalazs Scheidler inet_sk(sk)->transparent = valbool; 6496c468622SBalazs Scheidler retv = 0; 6506c468622SBalazs Scheidler break; 6516c468622SBalazs Scheidler 65284e14fe3SMaciej Żenczykowski case IPV6_FREEBIND: 65384e14fe3SMaciej Żenczykowski if (optlen < sizeof(int)) 65484e14fe3SMaciej Żenczykowski goto e_inval; 65584e14fe3SMaciej Żenczykowski /* we also don't have a separate freebind bit for IPV6 */ 65684e14fe3SMaciej Żenczykowski inet_sk(sk)->freebind = valbool; 65784e14fe3SMaciej Żenczykowski retv = 0; 65884e14fe3SMaciej Żenczykowski break; 65984e14fe3SMaciej Żenczykowski 6606c468622SBalazs Scheidler case IPV6_RECVORIGDSTADDR: 6616c468622SBalazs Scheidler if (optlen < sizeof(int)) 6626c468622SBalazs Scheidler goto e_inval; 6636c468622SBalazs Scheidler np->rxopt.bits.rxorigdstaddr = valbool; 6646c468622SBalazs Scheidler retv = 0; 6656c468622SBalazs Scheidler break; 6666c468622SBalazs Scheidler 667333fad53SYOSHIFUJI Hideaki case IPV6_HOPOPTS: 668333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 669333fad53SYOSHIFUJI Hideaki case IPV6_RTHDR: 670333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 671b84d2b73SChristoph Hellwig retv = ipv6_set_opt_hdr(sk, optname, optval, optlen); 672a9ba23d4SPaul Moore break; 673aea7427fSShan Wei 674b24a2516SYang Hongyang case IPV6_PKTINFO: 675b24a2516SYang Hongyang { 676b24a2516SYang Hongyang struct in6_pktinfo pkt; 677b24a2516SYang Hongyang 678b24a2516SYang Hongyang if (optlen == 0) 679b24a2516SYang Hongyang goto e_inval; 680894cfbc0SChristoph Hellwig else if (optlen < sizeof(struct in6_pktinfo) || 681894cfbc0SChristoph Hellwig sockptr_is_null(optval)) 682b24a2516SYang Hongyang goto e_inval; 683b24a2516SYang Hongyang 684894cfbc0SChristoph Hellwig if (copy_from_sockptr(&pkt, optval, sizeof(pkt))) { 685b24a2516SYang Hongyang retv = -EFAULT; 686b24a2516SYang Hongyang break; 687b24a2516SYang Hongyang } 688d839a0ebSMike Manning if (!sk_dev_equal_l3scope(sk, pkt.ipi6_ifindex)) 689b24a2516SYang Hongyang goto e_inval; 690b24a2516SYang Hongyang 691b24a2516SYang Hongyang np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex; 6924e3fd7a0SAlexey Dobriyan np->sticky_pktinfo.ipi6_addr = pkt.ipi6_addr; 693b24a2516SYang Hongyang retv = 0; 694b24a2516SYang Hongyang break; 695b24a2516SYang Hongyang } 696b24a2516SYang Hongyang 697333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTOPTIONS: 6981da177e4SLinus Torvalds { 6991da177e4SLinus Torvalds struct ipv6_txoptions *opt = NULL; 7001da177e4SLinus Torvalds struct msghdr msg; 7014c9483b2SDavid S. Miller struct flowi6 fl6; 70226879da5SWei Wang struct ipcm6_cookie ipc6; 7031da177e4SLinus Torvalds 7044c9483b2SDavid S. Miller memset(&fl6, 0, sizeof(fl6)); 7054c9483b2SDavid S. Miller fl6.flowi6_oif = sk->sk_bound_dev_if; 7064c9483b2SDavid S. Miller fl6.flowi6_mark = sk->sk_mark; 7071da177e4SLinus Torvalds 7081da177e4SLinus Torvalds if (optlen == 0) 7091da177e4SLinus Torvalds goto update; 7101da177e4SLinus Torvalds 7111da177e4SLinus Torvalds /* 1K is probably excessive 7121da177e4SLinus Torvalds * 1K is surely not enough, 2K per standard header is 16K. 7131da177e4SLinus Torvalds */ 7141da177e4SLinus Torvalds retv = -EINVAL; 7151da177e4SLinus Torvalds if (optlen > 64*1024) 7161da177e4SLinus Torvalds break; 7171da177e4SLinus Torvalds 7181da177e4SLinus Torvalds opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); 7191da177e4SLinus Torvalds retv = -ENOBUFS; 72063159f29SIan Morris if (!opt) 7211da177e4SLinus Torvalds break; 7221da177e4SLinus Torvalds 7231da177e4SLinus Torvalds memset(opt, 0, sizeof(*opt)); 7240aeea21aSReshetova, Elena refcount_set(&opt->refcnt, 1); 7251da177e4SLinus Torvalds opt->tot_len = sizeof(*opt) + optlen; 7261da177e4SLinus Torvalds retv = -EFAULT; 727894cfbc0SChristoph Hellwig if (copy_from_sockptr(opt + 1, optval, optlen)) 7281da177e4SLinus Torvalds goto done; 7291da177e4SLinus Torvalds 7301da177e4SLinus Torvalds msg.msg_controllen = optlen; 7311da177e4SLinus Torvalds msg.msg_control = (void *)(opt+1); 73226879da5SWei Wang ipc6.opt = opt; 7331da177e4SLinus Torvalds 7345fdaa88dSWillem de Bruijn retv = ip6_datagram_send_ctl(net, sk, &msg, &fl6, &ipc6); 7351da177e4SLinus Torvalds if (retv) 7361da177e4SLinus Torvalds goto done; 7371da177e4SLinus Torvalds update: 7381da177e4SLinus Torvalds retv = 0; 739e7712f1aSYOSHIFUJI Hideaki opt = ipv6_update_options(sk, opt); 7401da177e4SLinus Torvalds done: 74145f6fad8SEric Dumazet if (opt) { 74245f6fad8SEric Dumazet atomic_sub(opt->tot_len, &sk->sk_omem_alloc); 74345f6fad8SEric Dumazet txopt_put(opt); 74445f6fad8SEric Dumazet } 7451da177e4SLinus Torvalds break; 7461da177e4SLinus Torvalds } 7471da177e4SLinus Torvalds case IPV6_UNICAST_HOPS: 748b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 749b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 7501da177e4SLinus Torvalds if (val > 255 || val < -1) 7511da177e4SLinus Torvalds goto e_inval; 7521da177e4SLinus Torvalds np->hop_limit = val; 7531da177e4SLinus Torvalds retv = 0; 7541da177e4SLinus Torvalds break; 7551da177e4SLinus Torvalds 7561da177e4SLinus Torvalds case IPV6_MULTICAST_HOPS: 7571da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM) 7581717699cSYOSHIFUJI Hideaki break; 759b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 760b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 7611da177e4SLinus Torvalds if (val > 255 || val < -1) 7621da177e4SLinus Torvalds goto e_inval; 7632a38e6d5SLi Wei np->mcast_hops = (val == -1 ? IPV6_DEFAULT_MCASTHOPS : val); 7641da177e4SLinus Torvalds retv = 0; 7651da177e4SLinus Torvalds break; 7661da177e4SLinus Torvalds 7671da177e4SLinus Torvalds case IPV6_MULTICAST_LOOP: 768b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 769b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 77028d44882SYOSHIFUJI Hideaki if (val != valbool) 77128d44882SYOSHIFUJI Hideaki goto e_inval; 7721da177e4SLinus Torvalds np->mc_loop = valbool; 7731da177e4SLinus Torvalds retv = 0; 7741da177e4SLinus Torvalds break; 7751da177e4SLinus Torvalds 776c4062dfcSErich E. Hoover case IPV6_UNICAST_IF: 777c4062dfcSErich E. Hoover { 778c4062dfcSErich E. Hoover struct net_device *dev = NULL; 779c4062dfcSErich E. Hoover int ifindex; 780c4062dfcSErich E. Hoover 781c4062dfcSErich E. Hoover if (optlen != sizeof(int)) 782c4062dfcSErich E. Hoover goto e_inval; 783c4062dfcSErich E. Hoover 784c4062dfcSErich E. Hoover ifindex = (__force int)ntohl((__force __be32)val); 785c4062dfcSErich E. Hoover if (ifindex == 0) { 786c4062dfcSErich E. Hoover np->ucast_oif = 0; 787c4062dfcSErich E. Hoover retv = 0; 788c4062dfcSErich E. Hoover break; 789c4062dfcSErich E. Hoover } 790c4062dfcSErich E. Hoover 791c4062dfcSErich E. Hoover dev = dev_get_by_index(net, ifindex); 792c4062dfcSErich E. Hoover retv = -EADDRNOTAVAIL; 793c4062dfcSErich E. Hoover if (!dev) 794c4062dfcSErich E. Hoover break; 795c4062dfcSErich E. Hoover dev_put(dev); 796c4062dfcSErich E. Hoover 797c4062dfcSErich E. Hoover retv = -EINVAL; 798c4062dfcSErich E. Hoover if (sk->sk_bound_dev_if) 799c4062dfcSErich E. Hoover break; 800c4062dfcSErich E. Hoover 801c4062dfcSErich E. Hoover np->ucast_oif = ifindex; 802c4062dfcSErich E. Hoover retv = 0; 803c4062dfcSErich E. Hoover break; 804c4062dfcSErich E. Hoover } 805c4062dfcSErich E. Hoover 8061da177e4SLinus Torvalds case IPV6_MULTICAST_IF: 8071da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM) 8081717699cSYOSHIFUJI Hideaki break; 809b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 810b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 8114953f0fcSBrian Haley 8124953f0fcSBrian Haley if (val) { 81355b80503SEric Dumazet struct net_device *dev; 8147bb387c5SDavid Ahern int midx; 81555b80503SEric Dumazet 8167bb387c5SDavid Ahern rcu_read_lock(); 8171da177e4SLinus Torvalds 8187bb387c5SDavid Ahern dev = dev_get_by_index_rcu(net, val); 81955b80503SEric Dumazet if (!dev) { 8207bb387c5SDavid Ahern rcu_read_unlock(); 8211da177e4SLinus Torvalds retv = -ENODEV; 8221da177e4SLinus Torvalds break; 8231da177e4SLinus Torvalds } 8247bb387c5SDavid Ahern midx = l3mdev_master_ifindex_rcu(dev); 8257bb387c5SDavid Ahern 8267bb387c5SDavid Ahern rcu_read_unlock(); 8277bb387c5SDavid Ahern 8287bb387c5SDavid Ahern if (sk->sk_bound_dev_if && 8297bb387c5SDavid Ahern sk->sk_bound_dev_if != val && 8307bb387c5SDavid Ahern (!midx || midx != sk->sk_bound_dev_if)) 8317bb387c5SDavid Ahern goto e_inval; 8324953f0fcSBrian Haley } 8331da177e4SLinus Torvalds np->mcast_oif = val; 8341da177e4SLinus Torvalds retv = 0; 8351da177e4SLinus Torvalds break; 8361da177e4SLinus Torvalds case IPV6_ADD_MEMBERSHIP: 8371da177e4SLinus Torvalds case IPV6_DROP_MEMBERSHIP: 8381da177e4SLinus Torvalds { 8391da177e4SLinus Torvalds struct ipv6_mreq mreq; 8401da177e4SLinus Torvalds 841a28398baSWang Chen if (optlen < sizeof(struct ipv6_mreq)) 842a28398baSWang Chen goto e_inval; 843a28398baSWang Chen 844a96fb49bSFlavio Leitner retv = -EPROTO; 845a96fb49bSFlavio Leitner if (inet_sk(sk)->is_icsk) 846a96fb49bSFlavio Leitner break; 847a96fb49bSFlavio Leitner 8481da177e4SLinus Torvalds retv = -EFAULT; 849894cfbc0SChristoph Hellwig if (copy_from_sockptr(&mreq, optval, sizeof(struct ipv6_mreq))) 8501da177e4SLinus Torvalds break; 8511da177e4SLinus Torvalds 8521da177e4SLinus Torvalds if (optname == IPV6_ADD_MEMBERSHIP) 85354ff9ef3SMarcelo Ricardo Leitner retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); 8541da177e4SLinus Torvalds else 85554ff9ef3SMarcelo Ricardo Leitner retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); 8561da177e4SLinus Torvalds break; 8571da177e4SLinus Torvalds } 8581da177e4SLinus Torvalds case IPV6_JOIN_ANYCAST: 8591da177e4SLinus Torvalds case IPV6_LEAVE_ANYCAST: 8601da177e4SLinus Torvalds { 8611da177e4SLinus Torvalds struct ipv6_mreq mreq; 8621da177e4SLinus Torvalds 863a28398baSWang Chen if (optlen < sizeof(struct ipv6_mreq)) 8641da177e4SLinus Torvalds goto e_inval; 8651da177e4SLinus Torvalds 8661da177e4SLinus Torvalds retv = -EFAULT; 867894cfbc0SChristoph Hellwig if (copy_from_sockptr(&mreq, optval, sizeof(struct ipv6_mreq))) 8681da177e4SLinus Torvalds break; 8691da177e4SLinus Torvalds 8701da177e4SLinus Torvalds if (optname == IPV6_JOIN_ANYCAST) 8711da177e4SLinus Torvalds retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); 8721da177e4SLinus Torvalds else 8731da177e4SLinus Torvalds retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); 8741da177e4SLinus Torvalds break; 8751da177e4SLinus Torvalds } 87615033f04SAndre Naujoks case IPV6_MULTICAST_ALL: 87715033f04SAndre Naujoks if (optlen < sizeof(int)) 87815033f04SAndre Naujoks goto e_inval; 87915033f04SAndre Naujoks np->mc_all = valbool; 88015033f04SAndre Naujoks retv = 0; 88115033f04SAndre Naujoks break; 88215033f04SAndre Naujoks 8831da177e4SLinus Torvalds case MCAST_JOIN_GROUP: 8841da177e4SLinus Torvalds case MCAST_LEAVE_GROUP: 8853021ad52SChristoph Hellwig if (in_compat_syscall()) 8863021ad52SChristoph Hellwig retv = compat_ipv6_mcast_join_leave(sk, optname, optval, 8873021ad52SChristoph Hellwig optlen); 8883021ad52SChristoph Hellwig else 8893021ad52SChristoph Hellwig retv = ipv6_mcast_join_leave(sk, optname, optval, 8903021ad52SChristoph Hellwig optlen); 8911da177e4SLinus Torvalds break; 8921da177e4SLinus Torvalds case MCAST_JOIN_SOURCE_GROUP: 8931da177e4SLinus Torvalds case MCAST_LEAVE_SOURCE_GROUP: 8941da177e4SLinus Torvalds case MCAST_BLOCK_SOURCE: 8951da177e4SLinus Torvalds case MCAST_UNBLOCK_SOURCE: 8963021ad52SChristoph Hellwig retv = do_ipv6_mcast_group_source(sk, optname, optval, optlen); 8971da177e4SLinus Torvalds break; 8981da177e4SLinus Torvalds case MCAST_MSFILTER: 8993021ad52SChristoph Hellwig if (in_compat_syscall()) 9003021ad52SChristoph Hellwig retv = compat_ipv6_set_mcast_msfilter(sk, optval, 9013021ad52SChristoph Hellwig optlen); 9023021ad52SChristoph Hellwig else 903ca0e65ebSChristoph Hellwig retv = ipv6_set_mcast_msfilter(sk, optval, optlen); 9041da177e4SLinus Torvalds break; 9051da177e4SLinus Torvalds case IPV6_ROUTER_ALERT: 906b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 907b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 908725a8ff0SDenis V. Lunev retv = ip6_ra_control(sk, val); 9091da177e4SLinus Torvalds break; 9109036b2feSFrancesco Ruggeri case IPV6_ROUTER_ALERT_ISOLATE: 9119036b2feSFrancesco Ruggeri if (optlen < sizeof(int)) 9129036b2feSFrancesco Ruggeri goto e_inval; 9139036b2feSFrancesco Ruggeri np->rtalert_isolate = valbool; 9149036b2feSFrancesco Ruggeri retv = 0; 9159036b2feSFrancesco Ruggeri break; 9161da177e4SLinus Torvalds case IPV6_MTU_DISCOVER: 917b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 918b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 9190b95227aSHannes Frederic Sowa if (val < IPV6_PMTUDISC_DONT || val > IPV6_PMTUDISC_OMIT) 9201da177e4SLinus Torvalds goto e_inval; 9211da177e4SLinus Torvalds np->pmtudisc = val; 9221da177e4SLinus Torvalds retv = 0; 9231da177e4SLinus Torvalds break; 9241da177e4SLinus Torvalds case IPV6_MTU: 925b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 926b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 9271da177e4SLinus Torvalds if (val && val < IPV6_MIN_MTU) 9281da177e4SLinus Torvalds goto e_inval; 9291da177e4SLinus Torvalds np->frag_size = val; 9301da177e4SLinus Torvalds retv = 0; 9311da177e4SLinus Torvalds break; 9321da177e4SLinus Torvalds case IPV6_RECVERR: 933b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 934b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 9351da177e4SLinus Torvalds np->recverr = valbool; 9361da177e4SLinus Torvalds if (!val) 9371da177e4SLinus Torvalds skb_queue_purge(&sk->sk_error_queue); 9381da177e4SLinus Torvalds retv = 0; 9391da177e4SLinus Torvalds break; 9401da177e4SLinus Torvalds case IPV6_FLOWINFO_SEND: 941b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 942b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 9431da177e4SLinus Torvalds np->sndflow = valbool; 9441da177e4SLinus Torvalds retv = 0; 9451da177e4SLinus Torvalds break; 9461da177e4SLinus Torvalds case IPV6_FLOWLABEL_MGR: 947894cfbc0SChristoph Hellwig retv = ipv6_flowlabel_opt(sk, optval, optlen); 9481da177e4SLinus Torvalds break; 9491da177e4SLinus Torvalds case IPV6_IPSEC_POLICY: 9501da177e4SLinus Torvalds case IPV6_XFRM_POLICY: 9516fc0b4a7SHerbert Xu retv = -EPERM; 95240cd308eSMartin KaFai Lau if (!sockopt_ns_capable(net->user_ns, CAP_NET_ADMIN)) 9536fc0b4a7SHerbert Xu break; 954894cfbc0SChristoph Hellwig retv = xfrm_user_policy(sk, optname, optval, optlen); 9551da177e4SLinus Torvalds break; 9561da177e4SLinus Torvalds 9577cbca67cSYOSHIFUJI Hideaki case IPV6_ADDR_PREFERENCES: 958b2a9d7c2SYOSHIFUJI Hideaki if (optlen < sizeof(int)) 959b2a9d7c2SYOSHIFUJI Hideaki goto e_inval; 96018d5ad62SChristoph Hellwig retv = __ip6_sock_set_addr_preferences(sk, val); 9617cbca67cSYOSHIFUJI Hideaki break; 962e802af9cSStephen Hemminger case IPV6_MINHOPCOUNT: 963e802af9cSStephen Hemminger if (optlen < sizeof(int)) 964e802af9cSStephen Hemminger goto e_inval; 965e802af9cSStephen Hemminger if (val < 0 || val > 255) 966e802af9cSStephen Hemminger goto e_inval; 967790eb673SEric Dumazet 968790eb673SEric Dumazet if (val) 969790eb673SEric Dumazet static_branch_enable(&ip6_min_hopcount); 970790eb673SEric Dumazet 971cc17c3c8SEric Dumazet /* tcp_v6_err() and tcp_v6_rcv() might read min_hopcount 972cc17c3c8SEric Dumazet * while we are changing it. 973cc17c3c8SEric Dumazet */ 974cc17c3c8SEric Dumazet WRITE_ONCE(np->min_hopcount, val); 975d4596badSHannes Frederic Sowa retv = 0; 976793b1473SBrian Haley break; 977793b1473SBrian Haley case IPV6_DONTFRAG: 978793b1473SBrian Haley np->dontfrag = valbool; 979e802af9cSStephen Hemminger retv = 0; 980e802af9cSStephen Hemminger break; 981cb1ce2efSTom Herbert case IPV6_AUTOFLOWLABEL: 982cb1ce2efSTom Herbert np->autoflowlabel = valbool; 983513674b5SShaohua Li np->autoflowlabel_set = 1; 984cb1ce2efSTom Herbert retv = 0; 985cb1ce2efSTom Herbert break; 9860cc0aa61SWillem de Bruijn case IPV6_RECVFRAGSIZE: 9870cc0aa61SWillem de Bruijn np->rxopt.bits.recvfragsize = valbool; 9880cc0aa61SWillem de Bruijn retv = 0; 9890cc0aa61SWillem de Bruijn break; 99001370434SWillem de Bruijn case IPV6_RECVERR_RFC4884: 99101370434SWillem de Bruijn if (optlen < sizeof(int)) 99201370434SWillem de Bruijn goto e_inval; 99301370434SWillem de Bruijn if (val < 0 || val > 1) 99401370434SWillem de Bruijn goto e_inval; 99501370434SWillem de Bruijn np->recverr_rfc4884 = valbool; 99601370434SWillem de Bruijn retv = 0; 99701370434SWillem de Bruijn break; 9987cbca67cSYOSHIFUJI Hideaki } 9997cbca67cSYOSHIFUJI Hideaki 10003c52c6bbSKuniyuki Iwashima unlock: 100140cd308eSMartin KaFai Lau sockopt_release_sock(sk); 1002baf606d9SMarcelo Ricardo Leitner if (needs_rtnl) 1003baf606d9SMarcelo Ricardo Leitner rtnl_unlock(); 10041da177e4SLinus Torvalds 10051da177e4SLinus Torvalds return retv; 10061da177e4SLinus Torvalds 10071da177e4SLinus Torvalds e_inval: 1008*b45a337fSKuniyuki Iwashima retv = -EINVAL; 1009*b45a337fSKuniyuki Iwashima goto unlock; 10101da177e4SLinus Torvalds } 10111da177e4SLinus Torvalds 1012a7b75c5aSChristoph Hellwig int ipv6_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval, 1013a7b75c5aSChristoph Hellwig unsigned int optlen) 10143fdadf7dSDmitry Mishin { 10153fdadf7dSDmitry Mishin int err; 10163fdadf7dSDmitry Mishin 10173fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) 10183fdadf7dSDmitry Mishin return udp_prot.setsockopt(sk, level, optname, optval, optlen); 10193fdadf7dSDmitry Mishin 10203fdadf7dSDmitry Mishin if (level != SOL_IPV6) 10213fdadf7dSDmitry Mishin return -ENOPROTOOPT; 10223fdadf7dSDmitry Mishin 1023a7b75c5aSChristoph Hellwig err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); 10243fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 10253fdadf7dSDmitry Mishin /* we need to exclude all possible ENOPROTOOPTs except default case */ 10263fdadf7dSDmitry Mishin if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && 10273f34cfaeSPaolo Abeni optname != IPV6_XFRM_POLICY) 1028a7b75c5aSChristoph Hellwig err = nf_setsockopt(sk, PF_INET6, optname, optval, optlen); 10293fdadf7dSDmitry Mishin #endif 10303fdadf7dSDmitry Mishin return err; 10313fdadf7dSDmitry Mishin } 10327159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_setsockopt); 10333fdadf7dSDmitry Mishin 103428693079SDavid S. Miller static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, 10356dadbe4bSMartin KaFai Lau int optname, sockptr_t optval, int len) 1036333fad53SYOSHIFUJI Hideaki { 103728693079SDavid S. Miller struct ipv6_opt_hdr *hdr; 103828693079SDavid S. Miller 10394c6510a7SYOSHIFUJI Hideaki if (!opt) 1040333fad53SYOSHIFUJI Hideaki return 0; 10414c6510a7SYOSHIFUJI Hideaki 10424c6510a7SYOSHIFUJI Hideaki switch (optname) { 10434c6510a7SYOSHIFUJI Hideaki case IPV6_HOPOPTS: 104428693079SDavid S. Miller hdr = opt->hopopt; 10454c6510a7SYOSHIFUJI Hideaki break; 10464c6510a7SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 10474c6510a7SYOSHIFUJI Hideaki hdr = opt->dst0opt; 10484c6510a7SYOSHIFUJI Hideaki break; 10494c6510a7SYOSHIFUJI Hideaki case IPV6_RTHDR: 10504c6510a7SYOSHIFUJI Hideaki hdr = (struct ipv6_opt_hdr *)opt->srcrt; 10514c6510a7SYOSHIFUJI Hideaki break; 10524c6510a7SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 10534c6510a7SYOSHIFUJI Hideaki hdr = opt->dst1opt; 10544c6510a7SYOSHIFUJI Hideaki break; 10554c6510a7SYOSHIFUJI Hideaki default: 10564c6510a7SYOSHIFUJI Hideaki return -EINVAL; /* should not happen */ 10574c6510a7SYOSHIFUJI Hideaki } 10584c6510a7SYOSHIFUJI Hideaki 10594c6510a7SYOSHIFUJI Hideaki if (!hdr) 10604c6510a7SYOSHIFUJI Hideaki return 0; 106128693079SDavid S. Miller 1062d2b02ed9SChris Wright len = min_t(unsigned int, len, ipv6_optlen(hdr)); 10636dadbe4bSMartin KaFai Lau if (copy_to_sockptr(optval, hdr, len)) 1064333fad53SYOSHIFUJI Hideaki return -EFAULT; 106595b496b6SYang Hongyang return len; 1066333fad53SYOSHIFUJI Hideaki } 1067333fad53SYOSHIFUJI Hideaki 10686dadbe4bSMartin KaFai Lau static int ipv6_get_msfilter(struct sock *sk, sockptr_t optval, 10696dadbe4bSMartin KaFai Lau sockptr_t optlen, int len) 10701da177e4SLinus Torvalds { 1071db243b79SGustavo A. R. Silva const int size0 = offsetof(struct group_filter, gf_slist_flex); 1072d5541e85SChristoph Hellwig struct group_filter gsf; 1073931ca7abSAl Viro int num; 10741da177e4SLinus Torvalds int err; 10751da177e4SLinus Torvalds 1076931ca7abSAl Viro if (len < size0) 10771da177e4SLinus Torvalds return -EINVAL; 10786dadbe4bSMartin KaFai Lau if (copy_from_sockptr(&gsf, optval, size0)) 10791da177e4SLinus Torvalds return -EFAULT; 108020c61fbdSYOSHIFUJI Hideaki if (gsf.gf_group.ss_family != AF_INET6) 108120c61fbdSYOSHIFUJI Hideaki return -EADDRNOTAVAIL; 1082931ca7abSAl Viro num = gsf.gf_numsrc; 10830f95f7d4SMartin KaFai Lau sockopt_lock_sock(sk); 10846dadbe4bSMartin KaFai Lau err = ip6_mc_msfget(sk, &gsf, optval, size0); 1085931ca7abSAl Viro if (!err) { 1086931ca7abSAl Viro if (num > gsf.gf_numsrc) 1087931ca7abSAl Viro num = gsf.gf_numsrc; 10886dadbe4bSMartin KaFai Lau len = GROUP_FILTER_SIZE(num); 10896dadbe4bSMartin KaFai Lau if (copy_to_sockptr(optlen, &len, sizeof(int)) || 10906dadbe4bSMartin KaFai Lau copy_to_sockptr(optval, &gsf, size0)) 1091931ca7abSAl Viro err = -EFAULT; 1092931ca7abSAl Viro } 10930f95f7d4SMartin KaFai Lau sockopt_release_sock(sk); 10941da177e4SLinus Torvalds return err; 10951da177e4SLinus Torvalds } 10961da177e4SLinus Torvalds 10976dadbe4bSMartin KaFai Lau static int compat_ipv6_get_msfilter(struct sock *sk, sockptr_t optval, 10986dadbe4bSMartin KaFai Lau sockptr_t optlen, int len) 1099d5541e85SChristoph Hellwig { 1100db243b79SGustavo A. R. Silva const int size0 = offsetof(struct compat_group_filter, gf_slist_flex); 1101d5541e85SChristoph Hellwig struct compat_group_filter gf32; 1102d5541e85SChristoph Hellwig struct group_filter gf; 11039c3f9707SMartin KaFai Lau int err; 1104d5541e85SChristoph Hellwig int num; 1105d5541e85SChristoph Hellwig 1106d5541e85SChristoph Hellwig if (len < size0) 1107d5541e85SChristoph Hellwig return -EINVAL; 1108d5541e85SChristoph Hellwig 11096dadbe4bSMartin KaFai Lau if (copy_from_sockptr(&gf32, optval, size0)) 1110d5541e85SChristoph Hellwig return -EFAULT; 1111d5541e85SChristoph Hellwig gf.gf_interface = gf32.gf_interface; 1112d5541e85SChristoph Hellwig gf.gf_fmode = gf32.gf_fmode; 1113d5541e85SChristoph Hellwig num = gf.gf_numsrc = gf32.gf_numsrc; 1114d5541e85SChristoph Hellwig gf.gf_group = gf32.gf_group; 1115d5541e85SChristoph Hellwig 1116d5541e85SChristoph Hellwig if (gf.gf_group.ss_family != AF_INET6) 1117d5541e85SChristoph Hellwig return -EADDRNOTAVAIL; 1118d5541e85SChristoph Hellwig 11190f95f7d4SMartin KaFai Lau sockopt_lock_sock(sk); 11206dadbe4bSMartin KaFai Lau err = ip6_mc_msfget(sk, &gf, optval, size0); 11210f95f7d4SMartin KaFai Lau sockopt_release_sock(sk); 1122d5541e85SChristoph Hellwig if (err) 1123d5541e85SChristoph Hellwig return err; 1124d5541e85SChristoph Hellwig if (num > gf.gf_numsrc) 1125d5541e85SChristoph Hellwig num = gf.gf_numsrc; 1126d5541e85SChristoph Hellwig len = GROUP_FILTER_SIZE(num) - (sizeof(gf)-sizeof(gf32)); 11276dadbe4bSMartin KaFai Lau if (copy_to_sockptr(optlen, &len, sizeof(int)) || 11286dadbe4bSMartin KaFai Lau copy_to_sockptr_offset(optval, offsetof(struct compat_group_filter, gf_fmode), 11296dadbe4bSMartin KaFai Lau &gf.gf_fmode, sizeof(gf32.gf_fmode)) || 11306dadbe4bSMartin KaFai Lau copy_to_sockptr_offset(optval, offsetof(struct compat_group_filter, gf_numsrc), 11316dadbe4bSMartin KaFai Lau &gf.gf_numsrc, sizeof(gf32.gf_numsrc))) 1132d5541e85SChristoph Hellwig return -EFAULT; 1133d5541e85SChristoph Hellwig return 0; 1134d5541e85SChristoph Hellwig } 1135d5541e85SChristoph Hellwig 113638566ec0SMartin KaFai Lau int do_ipv6_getsockopt(struct sock *sk, int level, int optname, 11376dadbe4bSMartin KaFai Lau sockptr_t optval, sockptr_t optlen) 1138d5541e85SChristoph Hellwig { 1139d5541e85SChristoph Hellwig struct ipv6_pinfo *np = inet6_sk(sk); 1140d5541e85SChristoph Hellwig int len; 1141d5541e85SChristoph Hellwig int val; 1142d5541e85SChristoph Hellwig 1143d5541e85SChristoph Hellwig if (ip6_mroute_opt(optname)) 1144d5541e85SChristoph Hellwig return ip6_mroute_getsockopt(sk, optname, optval, optlen); 1145d5541e85SChristoph Hellwig 11466dadbe4bSMartin KaFai Lau if (copy_from_sockptr(&len, optlen, sizeof(int))) 1147d5541e85SChristoph Hellwig return -EFAULT; 1148d5541e85SChristoph Hellwig switch (optname) { 1149d5541e85SChristoph Hellwig case IPV6_ADDRFORM: 1150d5541e85SChristoph Hellwig if (sk->sk_protocol != IPPROTO_UDP && 1151d5541e85SChristoph Hellwig sk->sk_protocol != IPPROTO_UDPLITE && 1152d5541e85SChristoph Hellwig sk->sk_protocol != IPPROTO_TCP) 1153d5541e85SChristoph Hellwig return -ENOPROTOOPT; 1154d5541e85SChristoph Hellwig if (sk->sk_state != TCP_ESTABLISHED) 1155d5541e85SChristoph Hellwig return -ENOTCONN; 1156d5541e85SChristoph Hellwig val = sk->sk_family; 1157d5541e85SChristoph Hellwig break; 1158d5541e85SChristoph Hellwig case MCAST_MSFILTER: 11593021ad52SChristoph Hellwig if (in_compat_syscall()) 11609c3f9707SMartin KaFai Lau return compat_ipv6_get_msfilter(sk, optval, optlen, len); 1161d5541e85SChristoph Hellwig return ipv6_get_msfilter(sk, optval, optlen, len); 1162333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTOPTIONS: 11631da177e4SLinus Torvalds { 11641da177e4SLinus Torvalds struct msghdr msg; 11651da177e4SLinus Torvalds struct sk_buff *skb; 11661da177e4SLinus Torvalds 11671da177e4SLinus Torvalds if (sk->sk_type != SOCK_STREAM) 11681da177e4SLinus Torvalds return -ENOPROTOOPT; 11691da177e4SLinus Torvalds 11706dadbe4bSMartin KaFai Lau if (optval.is_kernel) { 11716dadbe4bSMartin KaFai Lau msg.msg_control_is_user = false; 11726dadbe4bSMartin KaFai Lau msg.msg_control = optval.kernel; 11736dadbe4bSMartin KaFai Lau } else { 11741b2f08dfSChristoph Hellwig msg.msg_control_is_user = true; 11756dadbe4bSMartin KaFai Lau msg.msg_control_user = optval.user; 11766dadbe4bSMartin KaFai Lau } 11771da177e4SLinus Torvalds msg.msg_controllen = len; 117875f23979SMartin KaFai Lau msg.msg_flags = 0; 11791da177e4SLinus Torvalds 11800f95f7d4SMartin KaFai Lau sockopt_lock_sock(sk); 11811da177e4SLinus Torvalds skb = np->pktoptions; 11821da177e4SLinus Torvalds if (skb) 11834b261c75SHannes Frederic Sowa ip6_datagram_recv_ctl(sk, &msg, skb); 11840f95f7d4SMartin KaFai Lau sockopt_release_sock(sk); 11851dc7b90fSEric Dumazet if (!skb) { 11861da177e4SLinus Torvalds if (np->rxopt.bits.rxinfo) { 11871da177e4SLinus Torvalds struct in6_pktinfo src_info; 1188f250dcdaSYang Hongyang src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : 1189f250dcdaSYang Hongyang np->sticky_pktinfo.ipi6_ifindex; 1190efe4208fSEric Dumazet src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : np->sticky_pktinfo.ipi6_addr; 11911da177e4SLinus Torvalds put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); 11921da177e4SLinus Torvalds } 11931da177e4SLinus Torvalds if (np->rxopt.bits.rxhlim) { 11941da177e4SLinus Torvalds int hlim = np->mcast_hops; 11951da177e4SLinus Torvalds put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); 11961da177e4SLinus Torvalds } 11974c507d28SJiri Benc if (np->rxopt.bits.rxtclass) { 1198d76ed22bSLi RongQing int tclass = (int)ip6_tclass(np->rcv_flowinfo); 1199d76ed22bSLi RongQing 12004c507d28SJiri Benc put_cmsg(&msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass); 12014c507d28SJiri Benc } 1202333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxoinfo) { 1203333fad53SYOSHIFUJI Hideaki struct in6_pktinfo src_info; 1204f250dcdaSYang Hongyang src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : 1205f250dcdaSYang Hongyang np->sticky_pktinfo.ipi6_ifindex; 1206efe4208fSEric Dumazet src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : 1207efe4208fSEric Dumazet np->sticky_pktinfo.ipi6_addr; 1208333fad53SYOSHIFUJI Hideaki put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); 1209333fad53SYOSHIFUJI Hideaki } 1210333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxohlim) { 1211333fad53SYOSHIFUJI Hideaki int hlim = np->mcast_hops; 1212333fad53SYOSHIFUJI Hideaki put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); 1213333fad53SYOSHIFUJI Hideaki } 12141397ed35SFlorent Fourcot if (np->rxopt.bits.rxflow) { 121568536053SFlorent Fourcot __be32 flowinfo = np->rcv_flowinfo; 121668536053SFlorent Fourcot 12171397ed35SFlorent Fourcot put_cmsg(&msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo); 12181397ed35SFlorent Fourcot } 12191da177e4SLinus Torvalds } 12201da177e4SLinus Torvalds len -= msg.msg_controllen; 12216dadbe4bSMartin KaFai Lau return copy_to_sockptr(optlen, &len, sizeof(int)); 12221da177e4SLinus Torvalds } 12231da177e4SLinus Torvalds case IPV6_MTU: 12241da177e4SLinus Torvalds { 12251da177e4SLinus Torvalds struct dst_entry *dst; 1226b6c6712aSEric Dumazet 12271da177e4SLinus Torvalds val = 0; 1228b6c6712aSEric Dumazet rcu_read_lock(); 1229b6c6712aSEric Dumazet dst = __sk_dst_get(sk); 1230b6c6712aSEric Dumazet if (dst) 12311da177e4SLinus Torvalds val = dst_mtu(dst); 1232b6c6712aSEric Dumazet rcu_read_unlock(); 12331da177e4SLinus Torvalds if (!val) 12341da177e4SLinus Torvalds return -ENOTCONN; 12351da177e4SLinus Torvalds break; 12361da177e4SLinus Torvalds } 12371da177e4SLinus Torvalds 12381da177e4SLinus Torvalds case IPV6_V6ONLY: 12399fe516baSEric Dumazet val = sk->sk_ipv6only; 12401da177e4SLinus Torvalds break; 12411da177e4SLinus Torvalds 1242333fad53SYOSHIFUJI Hideaki case IPV6_RECVPKTINFO: 12431da177e4SLinus Torvalds val = np->rxopt.bits.rxinfo; 12441da177e4SLinus Torvalds break; 12451da177e4SLinus Torvalds 1246333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 1247333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.rxoinfo; 1248333fad53SYOSHIFUJI Hideaki break; 1249333fad53SYOSHIFUJI Hideaki 1250333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPLIMIT: 12511da177e4SLinus Torvalds val = np->rxopt.bits.rxhlim; 12521da177e4SLinus Torvalds break; 12531da177e4SLinus Torvalds 1254333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 1255333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.rxohlim; 1256333fad53SYOSHIFUJI Hideaki break; 1257333fad53SYOSHIFUJI Hideaki 1258333fad53SYOSHIFUJI Hideaki case IPV6_RECVRTHDR: 12591da177e4SLinus Torvalds val = np->rxopt.bits.srcrt; 12601da177e4SLinus Torvalds break; 12611da177e4SLinus Torvalds 1262333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 1263333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.osrcrt; 1264333fad53SYOSHIFUJI Hideaki break; 1265333fad53SYOSHIFUJI Hideaki 12661da177e4SLinus Torvalds case IPV6_HOPOPTS: 1267333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 1268333fad53SYOSHIFUJI Hideaki case IPV6_RTHDR: 1269333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 1270333fad53SYOSHIFUJI Hideaki { 127145f6fad8SEric Dumazet struct ipv6_txoptions *opt; 1272333fad53SYOSHIFUJI Hideaki 12730f95f7d4SMartin KaFai Lau sockopt_lock_sock(sk); 12741e1d04e6SHannes Frederic Sowa opt = rcu_dereference_protected(np->opt, 12751e1d04e6SHannes Frederic Sowa lockdep_sock_is_held(sk)); 127645f6fad8SEric Dumazet len = ipv6_getsockopt_sticky(sk, opt, optname, optval, len); 12770f95f7d4SMartin KaFai Lau sockopt_release_sock(sk); 127805335c22SYang Hongyang /* check if ipv6_getsockopt_sticky() returns err code */ 127905335c22SYang Hongyang if (len < 0) 128005335c22SYang Hongyang return len; 12816dadbe4bSMartin KaFai Lau return copy_to_sockptr(optlen, &len, sizeof(int)); 1282333fad53SYOSHIFUJI Hideaki } 1283333fad53SYOSHIFUJI Hideaki 1284333fad53SYOSHIFUJI Hideaki case IPV6_RECVHOPOPTS: 12851da177e4SLinus Torvalds val = np->rxopt.bits.hopopts; 12861da177e4SLinus Torvalds break; 12871da177e4SLinus Torvalds 1288333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 1289333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.ohopopts; 1290333fad53SYOSHIFUJI Hideaki break; 1291333fad53SYOSHIFUJI Hideaki 1292333fad53SYOSHIFUJI Hideaki case IPV6_RECVDSTOPTS: 12931da177e4SLinus Torvalds val = np->rxopt.bits.dstopts; 12941da177e4SLinus Torvalds break; 12951da177e4SLinus Torvalds 1296333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 1297333fad53SYOSHIFUJI Hideaki val = np->rxopt.bits.odstopts; 1298333fad53SYOSHIFUJI Hideaki break; 1299333fad53SYOSHIFUJI Hideaki 130041a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 130141a1f8eaSYOSHIFUJI Hideaki val = np->tclass; 130241a1f8eaSYOSHIFUJI Hideaki break; 130341a1f8eaSYOSHIFUJI Hideaki 130441a1f8eaSYOSHIFUJI Hideaki case IPV6_RECVTCLASS: 130541a1f8eaSYOSHIFUJI Hideaki val = np->rxopt.bits.rxtclass; 130641a1f8eaSYOSHIFUJI Hideaki break; 130741a1f8eaSYOSHIFUJI Hideaki 13081da177e4SLinus Torvalds case IPV6_FLOWINFO: 13091da177e4SLinus Torvalds val = np->rxopt.bits.rxflow; 13101da177e4SLinus Torvalds break; 13111da177e4SLinus Torvalds 1312793b1473SBrian Haley case IPV6_RECVPATHMTU: 1313793b1473SBrian Haley val = np->rxopt.bits.rxpmtu; 1314793b1473SBrian Haley break; 1315793b1473SBrian Haley 1316793b1473SBrian Haley case IPV6_PATHMTU: 1317793b1473SBrian Haley { 1318793b1473SBrian Haley struct dst_entry *dst; 1319793b1473SBrian Haley struct ip6_mtuinfo mtuinfo; 1320793b1473SBrian Haley 1321793b1473SBrian Haley if (len < sizeof(mtuinfo)) 1322793b1473SBrian Haley return -EINVAL; 1323793b1473SBrian Haley 1324793b1473SBrian Haley len = sizeof(mtuinfo); 1325793b1473SBrian Haley memset(&mtuinfo, 0, sizeof(mtuinfo)); 1326793b1473SBrian Haley 1327793b1473SBrian Haley rcu_read_lock(); 1328793b1473SBrian Haley dst = __sk_dst_get(sk); 1329793b1473SBrian Haley if (dst) 1330793b1473SBrian Haley mtuinfo.ip6m_mtu = dst_mtu(dst); 1331793b1473SBrian Haley rcu_read_unlock(); 1332793b1473SBrian Haley if (!mtuinfo.ip6m_mtu) 1333793b1473SBrian Haley return -ENOTCONN; 1334793b1473SBrian Haley 13356dadbe4bSMartin KaFai Lau if (copy_to_sockptr(optlen, &len, sizeof(int))) 1336793b1473SBrian Haley return -EFAULT; 13376dadbe4bSMartin KaFai Lau if (copy_to_sockptr(optval, &mtuinfo, len)) 1338793b1473SBrian Haley return -EFAULT; 1339793b1473SBrian Haley 1340793b1473SBrian Haley return 0; 1341793b1473SBrian Haley } 1342793b1473SBrian Haley 13436c468622SBalazs Scheidler case IPV6_TRANSPARENT: 13446c468622SBalazs Scheidler val = inet_sk(sk)->transparent; 13456c468622SBalazs Scheidler break; 13466c468622SBalazs Scheidler 134784e14fe3SMaciej Żenczykowski case IPV6_FREEBIND: 134884e14fe3SMaciej Żenczykowski val = inet_sk(sk)->freebind; 134984e14fe3SMaciej Żenczykowski break; 135084e14fe3SMaciej Żenczykowski 13516c468622SBalazs Scheidler case IPV6_RECVORIGDSTADDR: 13526c468622SBalazs Scheidler val = np->rxopt.bits.rxorigdstaddr; 13536c468622SBalazs Scheidler break; 13546c468622SBalazs Scheidler 13551da177e4SLinus Torvalds case IPV6_UNICAST_HOPS: 13561da177e4SLinus Torvalds case IPV6_MULTICAST_HOPS: 1357befffe90SBrian Haley { 1358befffe90SBrian Haley struct dst_entry *dst; 1359befffe90SBrian Haley 1360befffe90SBrian Haley if (optname == IPV6_UNICAST_HOPS) 1361befffe90SBrian Haley val = np->hop_limit; 1362befffe90SBrian Haley else 13631da177e4SLinus Torvalds val = np->mcast_hops; 1364befffe90SBrian Haley 1365b6c6712aSEric Dumazet if (val < 0) { 1366b6c6712aSEric Dumazet rcu_read_lock(); 1367b6c6712aSEric Dumazet dst = __sk_dst_get(sk); 1368b6c6712aSEric Dumazet if (dst) 13696b75d090SYOSHIFUJI Hideaki val = ip6_dst_hoplimit(dst); 1370b6c6712aSEric Dumazet rcu_read_unlock(); 1371befffe90SBrian Haley } 1372b6c6712aSEric Dumazet 1373befffe90SBrian Haley if (val < 0) 137453b7997fSYOSHIFUJI Hideaki val = sock_net(sk)->ipv6.devconf_all->hop_limit; 13751da177e4SLinus Torvalds break; 1376befffe90SBrian Haley } 13771da177e4SLinus Torvalds 13781da177e4SLinus Torvalds case IPV6_MULTICAST_LOOP: 13791da177e4SLinus Torvalds val = np->mc_loop; 13801da177e4SLinus Torvalds break; 13811da177e4SLinus Torvalds 13821da177e4SLinus Torvalds case IPV6_MULTICAST_IF: 13831da177e4SLinus Torvalds val = np->mcast_oif; 13841da177e4SLinus Torvalds break; 13851da177e4SLinus Torvalds 138615033f04SAndre Naujoks case IPV6_MULTICAST_ALL: 138715033f04SAndre Naujoks val = np->mc_all; 138815033f04SAndre Naujoks break; 138915033f04SAndre Naujoks 1390c4062dfcSErich E. Hoover case IPV6_UNICAST_IF: 1391c4062dfcSErich E. Hoover val = (__force int)htonl((__u32) np->ucast_oif); 1392c4062dfcSErich E. Hoover break; 1393c4062dfcSErich E. Hoover 13941da177e4SLinus Torvalds case IPV6_MTU_DISCOVER: 13951da177e4SLinus Torvalds val = np->pmtudisc; 13961da177e4SLinus Torvalds break; 13971da177e4SLinus Torvalds 13981da177e4SLinus Torvalds case IPV6_RECVERR: 13991da177e4SLinus Torvalds val = np->recverr; 14001da177e4SLinus Torvalds break; 14011da177e4SLinus Torvalds 14021da177e4SLinus Torvalds case IPV6_FLOWINFO_SEND: 14031da177e4SLinus Torvalds val = np->sndflow; 14041da177e4SLinus Torvalds break; 14051da177e4SLinus Torvalds 14063fdfa5ffSFlorent Fourcot case IPV6_FLOWLABEL_MGR: 14073fdfa5ffSFlorent Fourcot { 14083fdfa5ffSFlorent Fourcot struct in6_flowlabel_req freq; 140946e5f401SFlorent Fourcot int flags; 14103fdfa5ffSFlorent Fourcot 14113fdfa5ffSFlorent Fourcot if (len < sizeof(freq)) 14123fdfa5ffSFlorent Fourcot return -EINVAL; 14133fdfa5ffSFlorent Fourcot 14146dadbe4bSMartin KaFai Lau if (copy_from_sockptr(&freq, optval, sizeof(freq))) 14153fdfa5ffSFlorent Fourcot return -EFAULT; 14163fdfa5ffSFlorent Fourcot 14173fdfa5ffSFlorent Fourcot if (freq.flr_action != IPV6_FL_A_GET) 14183fdfa5ffSFlorent Fourcot return -EINVAL; 14193fdfa5ffSFlorent Fourcot 14203fdfa5ffSFlorent Fourcot len = sizeof(freq); 142146e5f401SFlorent Fourcot flags = freq.flr_flags; 142246e5f401SFlorent Fourcot 14233fdfa5ffSFlorent Fourcot memset(&freq, 0, sizeof(freq)); 14243fdfa5ffSFlorent Fourcot 142546e5f401SFlorent Fourcot val = ipv6_flowlabel_opt_get(sk, &freq, flags); 14263fdfa5ffSFlorent Fourcot if (val < 0) 14273fdfa5ffSFlorent Fourcot return val; 14283fdfa5ffSFlorent Fourcot 14296dadbe4bSMartin KaFai Lau if (copy_to_sockptr(optlen, &len, sizeof(int))) 14303fdfa5ffSFlorent Fourcot return -EFAULT; 14316dadbe4bSMartin KaFai Lau if (copy_to_sockptr(optval, &freq, len)) 14323fdfa5ffSFlorent Fourcot return -EFAULT; 14333fdfa5ffSFlorent Fourcot 14343fdfa5ffSFlorent Fourcot return 0; 14353fdfa5ffSFlorent Fourcot } 14363fdfa5ffSFlorent Fourcot 14377cbca67cSYOSHIFUJI Hideaki case IPV6_ADDR_PREFERENCES: 14387cbca67cSYOSHIFUJI Hideaki val = 0; 14397cbca67cSYOSHIFUJI Hideaki 14407cbca67cSYOSHIFUJI Hideaki if (np->srcprefs & IPV6_PREFER_SRC_TMP) 14417cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_TMP; 14427cbca67cSYOSHIFUJI Hideaki else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) 14437cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_PUBLIC; 14447cbca67cSYOSHIFUJI Hideaki else { 14457cbca67cSYOSHIFUJI Hideaki /* XXX: should we return system default? */ 14467cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; 14477cbca67cSYOSHIFUJI Hideaki } 14487cbca67cSYOSHIFUJI Hideaki 14497cbca67cSYOSHIFUJI Hideaki if (np->srcprefs & IPV6_PREFER_SRC_COA) 14507cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_COA; 14517cbca67cSYOSHIFUJI Hideaki else 14527cbca67cSYOSHIFUJI Hideaki val |= IPV6_PREFER_SRC_HOME; 14537cbca67cSYOSHIFUJI Hideaki break; 14547cbca67cSYOSHIFUJI Hideaki 1455e802af9cSStephen Hemminger case IPV6_MINHOPCOUNT: 1456e802af9cSStephen Hemminger val = np->min_hopcount; 1457e802af9cSStephen Hemminger break; 1458e802af9cSStephen Hemminger 1459793b1473SBrian Haley case IPV6_DONTFRAG: 1460793b1473SBrian Haley val = np->dontfrag; 1461793b1473SBrian Haley break; 1462793b1473SBrian Haley 1463cb1ce2efSTom Herbert case IPV6_AUTOFLOWLABEL: 1464e9191ffbSBen Hutchings val = ip6_autoflowlabel(sock_net(sk), np); 1465cb1ce2efSTom Herbert break; 1466cb1ce2efSTom Herbert 14670cc0aa61SWillem de Bruijn case IPV6_RECVFRAGSIZE: 14680cc0aa61SWillem de Bruijn val = np->rxopt.bits.recvfragsize; 14690cc0aa61SWillem de Bruijn break; 14700cc0aa61SWillem de Bruijn 14719036b2feSFrancesco Ruggeri case IPV6_ROUTER_ALERT_ISOLATE: 14729036b2feSFrancesco Ruggeri val = np->rtalert_isolate; 14739036b2feSFrancesco Ruggeri break; 14749036b2feSFrancesco Ruggeri 147501370434SWillem de Bruijn case IPV6_RECVERR_RFC4884: 147601370434SWillem de Bruijn val = np->recverr_rfc4884; 147701370434SWillem de Bruijn break; 147801370434SWillem de Bruijn 14791da177e4SLinus Torvalds default: 1480cf6fc4a9SWei Yongjun return -ENOPROTOOPT; 14811da177e4SLinus Torvalds } 14821da177e4SLinus Torvalds len = min_t(unsigned int, sizeof(int), len); 14836dadbe4bSMartin KaFai Lau if (copy_to_sockptr(optlen, &len, sizeof(int))) 14841da177e4SLinus Torvalds return -EFAULT; 14856dadbe4bSMartin KaFai Lau if (copy_to_sockptr(optval, &val, len)) 14861da177e4SLinus Torvalds return -EFAULT; 14871da177e4SLinus Torvalds return 0; 14881da177e4SLinus Torvalds } 14891da177e4SLinus Torvalds 14903fdadf7dSDmitry Mishin int ipv6_getsockopt(struct sock *sk, int level, int optname, 14913fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 14923fdadf7dSDmitry Mishin { 14933fdadf7dSDmitry Mishin int err; 14943fdadf7dSDmitry Mishin 14953fdadf7dSDmitry Mishin if (level == SOL_IP && sk->sk_type != SOCK_RAW) 14963fdadf7dSDmitry Mishin return udp_prot.getsockopt(sk, level, optname, optval, optlen); 14973fdadf7dSDmitry Mishin 14983fdadf7dSDmitry Mishin if (level != SOL_IPV6) 14993fdadf7dSDmitry Mishin return -ENOPROTOOPT; 15003fdadf7dSDmitry Mishin 15016dadbe4bSMartin KaFai Lau err = do_ipv6_getsockopt(sk, level, optname, 15026dadbe4bSMartin KaFai Lau USER_SOCKPTR(optval), USER_SOCKPTR(optlen)); 15033fdadf7dSDmitry Mishin #ifdef CONFIG_NETFILTER 1504cf6fc4a9SWei Yongjun /* we need to exclude all possible ENOPROTOOPTs except default case */ 1505cf6fc4a9SWei Yongjun if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { 15063fdadf7dSDmitry Mishin int len; 15073fdadf7dSDmitry Mishin 15083fdadf7dSDmitry Mishin if (get_user(len, optlen)) 15093fdadf7dSDmitry Mishin return -EFAULT; 15103fdadf7dSDmitry Mishin 151101ea306fSPaolo Abeni err = nf_getsockopt(sk, PF_INET6, optname, optval, &len); 15123fdadf7dSDmitry Mishin if (err >= 0) 15133fdadf7dSDmitry Mishin err = put_user(len, optlen); 15143fdadf7dSDmitry Mishin } 15153fdadf7dSDmitry Mishin #endif 15163fdadf7dSDmitry Mishin return err; 15173fdadf7dSDmitry Mishin } 15187159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(ipv6_getsockopt); 1519