11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * PF_INET6 socket protocol family 31da177e4SLinus Torvalds * Linux INET6 implementation 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Authors: 61da177e4SLinus Torvalds * Pedro Roque <roque@di.fc.ul.pt> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * Adapted from linux/net/ipv4/af_inet.c 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds * Fixes: 111da177e4SLinus Torvalds * piggy, Karl Knutson : Socket protocol table 121da177e4SLinus Torvalds * Hideaki YOSHIFUJI : sin6_scope_id support 131da177e4SLinus Torvalds * Arnaldo Melo : check proc_net_create return, cleanups 141da177e4SLinus Torvalds * 151da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 161da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 171da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 181da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 191da177e4SLinus Torvalds */ 201da177e4SLinus Torvalds 211da177e4SLinus Torvalds 221da177e4SLinus Torvalds #include <linux/module.h> 234fc268d2SRandy Dunlap #include <linux/capability.h> 241da177e4SLinus Torvalds #include <linux/errno.h> 251da177e4SLinus Torvalds #include <linux/types.h> 261da177e4SLinus Torvalds #include <linux/socket.h> 271da177e4SLinus Torvalds #include <linux/in.h> 281da177e4SLinus Torvalds #include <linux/kernel.h> 291da177e4SLinus Torvalds #include <linux/timer.h> 301da177e4SLinus Torvalds #include <linux/string.h> 311da177e4SLinus Torvalds #include <linux/sockios.h> 321da177e4SLinus Torvalds #include <linux/net.h> 331da177e4SLinus Torvalds #include <linux/fcntl.h> 341da177e4SLinus Torvalds #include <linux/mm.h> 351da177e4SLinus Torvalds #include <linux/interrupt.h> 361da177e4SLinus Torvalds #include <linux/proc_fs.h> 371da177e4SLinus Torvalds #include <linux/stat.h> 381da177e4SLinus Torvalds #include <linux/init.h> 395a0e3ad6STejun Heo #include <linux/slab.h> 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds #include <linux/inet.h> 421da177e4SLinus Torvalds #include <linux/netdevice.h> 431da177e4SLinus Torvalds #include <linux/icmpv6.h> 442cc7d573SHarald Welte #include <linux/netfilter_ipv6.h> 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds #include <net/ip.h> 471da177e4SLinus Torvalds #include <net/ipv6.h> 481da177e4SLinus Torvalds #include <net/udp.h> 49ba4e58ecSGerrit Renker #include <net/udplite.h> 501da177e4SLinus Torvalds #include <net/tcp.h> 511da177e4SLinus Torvalds #include <net/ipip.h> 521da177e4SLinus Torvalds #include <net/protocol.h> 531da177e4SLinus Torvalds #include <net/inet_common.h> 541668e010SKOVACS Krisztian #include <net/route.h> 551da177e4SLinus Torvalds #include <net/transp_v6.h> 561da177e4SLinus Torvalds #include <net/ip6_route.h> 571da177e4SLinus Torvalds #include <net/addrconf.h> 581da177e4SLinus Torvalds #ifdef CONFIG_IPV6_TUNNEL 591da177e4SLinus Torvalds #include <net/ip6_tunnel.h> 601da177e4SLinus Torvalds #endif 611da177e4SLinus Torvalds 621da177e4SLinus Torvalds #include <asm/uaccess.h> 631da177e4SLinus Torvalds #include <asm/system.h> 647bc570c8SYOSHIFUJI Hideaki #include <linux/mroute6.h> 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds MODULE_AUTHOR("Cast of dozens"); 671da177e4SLinus Torvalds MODULE_DESCRIPTION("IPv6 protocol stack for Linux"); 681da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 691da177e4SLinus Torvalds 70f1267347SPavel Emelyanov /* The inetsw6 table contains everything that inet6_create needs to 711da177e4SLinus Torvalds * build a new socket. 721da177e4SLinus Torvalds */ 731da177e4SLinus Torvalds static struct list_head inetsw6[SOCK_MAX]; 741da177e4SLinus Torvalds static DEFINE_SPINLOCK(inetsw6_lock); 751da177e4SLinus Torvalds 7656d417b1SBrian Haley struct ipv6_params ipv6_defaults = { 7756d417b1SBrian Haley .disable_ipv6 = 0, 7856d417b1SBrian Haley .autoconf = 1, 7956d417b1SBrian Haley }; 8056d417b1SBrian Haley 8156d417b1SBrian Haley static int disable_ipv6_mod = 0; 8256d417b1SBrian Haley 8356d417b1SBrian Haley module_param_named(disable, disable_ipv6_mod, int, 0444); 8456d417b1SBrian Haley MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional"); 8556d417b1SBrian Haley 8656d417b1SBrian Haley module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444); 8756d417b1SBrian Haley MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces"); 8856d417b1SBrian Haley 8956d417b1SBrian Haley module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444); 9056d417b1SBrian Haley MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces"); 91fe7ca2e1SBrian Haley 921da177e4SLinus Torvalds static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk) 931da177e4SLinus Torvalds { 941da177e4SLinus Torvalds const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo); 951da177e4SLinus Torvalds 961da177e4SLinus Torvalds return (struct ipv6_pinfo *)(((u8 *)sk) + offset); 971da177e4SLinus Torvalds } 981da177e4SLinus Torvalds 993f378b68SEric Paris static int inet6_create(struct net *net, struct socket *sock, int protocol, 1003f378b68SEric Paris int kern) 1011da177e4SLinus Torvalds { 1021da177e4SLinus Torvalds struct inet_sock *inet; 1031da177e4SLinus Torvalds struct ipv6_pinfo *np; 1041da177e4SLinus Torvalds struct sock *sk; 1051da177e4SLinus Torvalds struct inet_protosw *answer; 1061da177e4SLinus Torvalds struct proto *answer_prot; 1071da177e4SLinus Torvalds unsigned char answer_flags; 1081da177e4SLinus Torvalds char answer_no_check; 109af1afe86SYOSHIFUJI Hideaki int try_loading_module = 0; 110af1afe86SYOSHIFUJI Hideaki int err; 1111da177e4SLinus Torvalds 112b3da2cf3SDavid S. Miller if (sock->type != SOCK_RAW && 113b3da2cf3SDavid S. Miller sock->type != SOCK_DGRAM && 114b3da2cf3SDavid S. Miller !inet_ehash_secret) 115b3da2cf3SDavid S. Miller build_ehash_secret(); 116b3da2cf3SDavid S. Miller 1171da177e4SLinus Torvalds /* Look for the requested type/protocol pair. */ 118af1afe86SYOSHIFUJI Hideaki lookup_protocol: 119af1afe86SYOSHIFUJI Hideaki err = -ESOCKTNOSUPPORT; 1201da177e4SLinus Torvalds rcu_read_lock(); 121696adfe8SPaul E. McKenney list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) { 1221da177e4SLinus Torvalds 123696adfe8SPaul E. McKenney err = 0; 1241da177e4SLinus Torvalds /* Check the non-wild match. */ 1251da177e4SLinus Torvalds if (protocol == answer->protocol) { 1261da177e4SLinus Torvalds if (protocol != IPPROTO_IP) 1271da177e4SLinus Torvalds break; 1281da177e4SLinus Torvalds } else { 1291da177e4SLinus Torvalds /* Check for the two wild cases. */ 1301da177e4SLinus Torvalds if (IPPROTO_IP == protocol) { 1311da177e4SLinus Torvalds protocol = answer->protocol; 1321da177e4SLinus Torvalds break; 1331da177e4SLinus Torvalds } 1341da177e4SLinus Torvalds if (IPPROTO_IP == answer->protocol) 1351da177e4SLinus Torvalds break; 1361da177e4SLinus Torvalds } 137af1afe86SYOSHIFUJI Hideaki err = -EPROTONOSUPPORT; 1381da177e4SLinus Torvalds } 1391da177e4SLinus Torvalds 140696adfe8SPaul E. McKenney if (err) { 141af1afe86SYOSHIFUJI Hideaki if (try_loading_module < 2) { 142af1afe86SYOSHIFUJI Hideaki rcu_read_unlock(); 143af1afe86SYOSHIFUJI Hideaki /* 144af1afe86SYOSHIFUJI Hideaki * Be more specific, e.g. net-pf-10-proto-132-type-1 145af1afe86SYOSHIFUJI Hideaki * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM) 146af1afe86SYOSHIFUJI Hideaki */ 147af1afe86SYOSHIFUJI Hideaki if (++try_loading_module == 1) 148af1afe86SYOSHIFUJI Hideaki request_module("net-pf-%d-proto-%d-type-%d", 149af1afe86SYOSHIFUJI Hideaki PF_INET6, protocol, sock->type); 150af1afe86SYOSHIFUJI Hideaki /* 151af1afe86SYOSHIFUJI Hideaki * Fall back to generic, e.g. net-pf-10-proto-132 152af1afe86SYOSHIFUJI Hideaki * (net-pf-PF_INET6-proto-IPPROTO_SCTP) 153af1afe86SYOSHIFUJI Hideaki */ 154af1afe86SYOSHIFUJI Hideaki else 155af1afe86SYOSHIFUJI Hideaki request_module("net-pf-%d-proto-%d", 156af1afe86SYOSHIFUJI Hideaki PF_INET6, protocol); 157af1afe86SYOSHIFUJI Hideaki goto lookup_protocol; 158af1afe86SYOSHIFUJI Hideaki } else 1591da177e4SLinus Torvalds goto out_rcu_unlock; 160af1afe86SYOSHIFUJI Hideaki } 161af1afe86SYOSHIFUJI Hideaki 162af1afe86SYOSHIFUJI Hideaki err = -EPERM; 163c84b3268SEric Paris if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) 1641da177e4SLinus Torvalds goto out_rcu_unlock; 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds sock->ops = answer->ops; 1671da177e4SLinus Torvalds answer_prot = answer->prot; 1681da177e4SLinus Torvalds answer_no_check = answer->no_check; 1691da177e4SLinus Torvalds answer_flags = answer->flags; 1701da177e4SLinus Torvalds rcu_read_unlock(); 1711da177e4SLinus Torvalds 172547b792cSIlpo Järvinen WARN_ON(answer_prot->slab == NULL); 1731da177e4SLinus Torvalds 174af1afe86SYOSHIFUJI Hideaki err = -ENOBUFS; 1756257ff21SPavel Emelyanov sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot); 1761da177e4SLinus Torvalds if (sk == NULL) 1771da177e4SLinus Torvalds goto out; 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds sock_init_data(sock, sk); 1801da177e4SLinus Torvalds 181af1afe86SYOSHIFUJI Hideaki err = 0; 1821da177e4SLinus Torvalds sk->sk_no_check = answer_no_check; 1831da177e4SLinus Torvalds if (INET_PROTOSW_REUSE & answer_flags) 1841da177e4SLinus Torvalds sk->sk_reuse = 1; 1851da177e4SLinus Torvalds 1861da177e4SLinus Torvalds inet = inet_sk(sk); 187469de9b9SPaul Moore inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0; 1881da177e4SLinus Torvalds 1891da177e4SLinus Torvalds if (SOCK_RAW == sock->type) { 190c720c7e8SEric Dumazet inet->inet_num = protocol; 1911da177e4SLinus Torvalds if (IPPROTO_RAW == protocol) 1921da177e4SLinus Torvalds inet->hdrincl = 1; 1931da177e4SLinus Torvalds } 1941da177e4SLinus Torvalds 195e6848976SArnaldo Carvalho de Melo sk->sk_destruct = inet_sock_destruct; 1961da177e4SLinus Torvalds sk->sk_family = PF_INET6; 1971da177e4SLinus Torvalds sk->sk_protocol = protocol; 1981da177e4SLinus Torvalds 1991da177e4SLinus Torvalds sk->sk_backlog_rcv = answer->prot->backlog_rcv; 2001da177e4SLinus Torvalds 2011da177e4SLinus Torvalds inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk); 2021da177e4SLinus Torvalds np->hop_limit = -1; 203f935aa9eSDavid S. Miller np->mcast_hops = IPV6_DEFAULT_MCASTHOPS; 2041da177e4SLinus Torvalds np->mc_loop = 1; 2051da177e4SLinus Torvalds np->pmtudisc = IPV6_PMTUDISC_WANT; 2062e761e05SPavel Emelyanov np->ipv6only = net->ipv6.sysctl.bindv6only; 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds /* Init the ipv4 part of the socket since we can have sockets 2091da177e4SLinus Torvalds * using v6 API for ipv4. 2101da177e4SLinus Torvalds */ 2111da177e4SLinus Torvalds inet->uc_ttl = -1; 2121da177e4SLinus Torvalds 2131da177e4SLinus Torvalds inet->mc_loop = 1; 2141da177e4SLinus Torvalds inet->mc_ttl = 1; 2151da177e4SLinus Torvalds inet->mc_index = 0; 2161da177e4SLinus Torvalds inet->mc_list = NULL; 2171da177e4SLinus Torvalds 2181da177e4SLinus Torvalds if (ipv4_config.no_pmtu_disc) 2191da177e4SLinus Torvalds inet->pmtudisc = IP_PMTUDISC_DONT; 2201da177e4SLinus Torvalds else 2211da177e4SLinus Torvalds inet->pmtudisc = IP_PMTUDISC_WANT; 222e6848976SArnaldo Carvalho de Melo /* 223e6848976SArnaldo Carvalho de Melo * Increment only the relevant sk_prot->socks debug field, this changes 224e6848976SArnaldo Carvalho de Melo * the previous behaviour of incrementing both the equivalent to 225e6848976SArnaldo Carvalho de Melo * answer->prot->socks (inet6_sock_nr) and inet_sock_nr. 226e6848976SArnaldo Carvalho de Melo * 227e6848976SArnaldo Carvalho de Melo * This allows better debug granularity as we'll know exactly how many 228e6848976SArnaldo Carvalho de Melo * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6 229e6848976SArnaldo Carvalho de Melo * transport protocol socks. -acme 230e6848976SArnaldo Carvalho de Melo */ 231e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_inc(sk); 2321da177e4SLinus Torvalds 233c720c7e8SEric Dumazet if (inet->inet_num) { 2341da177e4SLinus Torvalds /* It assumes that any protocol which allows 2351da177e4SLinus Torvalds * the user to assign a number at socket 2361da177e4SLinus Torvalds * creation time automatically shares. 2371da177e4SLinus Torvalds */ 238c720c7e8SEric Dumazet inet->inet_sport = htons(inet->inet_num); 2391da177e4SLinus Torvalds sk->sk_prot->hash(sk); 2401da177e4SLinus Torvalds } 2411da177e4SLinus Torvalds if (sk->sk_prot->init) { 242af1afe86SYOSHIFUJI Hideaki err = sk->sk_prot->init(sk); 243af1afe86SYOSHIFUJI Hideaki if (err) { 2441da177e4SLinus Torvalds sk_common_release(sk); 2451da177e4SLinus Torvalds goto out; 2461da177e4SLinus Torvalds } 2471da177e4SLinus Torvalds } 2481da177e4SLinus Torvalds out: 249af1afe86SYOSHIFUJI Hideaki return err; 2501da177e4SLinus Torvalds out_rcu_unlock: 2511da177e4SLinus Torvalds rcu_read_unlock(); 2521da177e4SLinus Torvalds goto out; 2531da177e4SLinus Torvalds } 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds /* bind for INET6 API */ 2571da177e4SLinus Torvalds int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) 2581da177e4SLinus Torvalds { 2591da177e4SLinus Torvalds struct sockaddr_in6 *addr=(struct sockaddr_in6 *)uaddr; 2601da177e4SLinus Torvalds struct sock *sk = sock->sk; 2611da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 2621da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 2633b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(sk); 264fd683222SAl Viro __be32 v4addr = 0; 2651da177e4SLinus Torvalds unsigned short snum; 2661da177e4SLinus Torvalds int addr_type = 0; 2671da177e4SLinus Torvalds int err = 0; 2681da177e4SLinus Torvalds 2691da177e4SLinus Torvalds /* If the socket has its own bind function then use it. */ 2701da177e4SLinus Torvalds if (sk->sk_prot->bind) 2711da177e4SLinus Torvalds return sk->sk_prot->bind(sk, uaddr, addr_len); 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds if (addr_len < SIN6_LEN_RFC2133) 2741da177e4SLinus Torvalds return -EINVAL; 2751da177e4SLinus Torvalds addr_type = ipv6_addr_type(&addr->sin6_addr); 2761da177e4SLinus Torvalds if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM) 2771da177e4SLinus Torvalds return -EINVAL; 2781da177e4SLinus Torvalds 2791da177e4SLinus Torvalds snum = ntohs(addr->sin6_port); 2801da177e4SLinus Torvalds if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 2811da177e4SLinus Torvalds return -EACCES; 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds lock_sock(sk); 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds /* Check these errors (active socket, double bind). */ 286c720c7e8SEric Dumazet if (sk->sk_state != TCP_CLOSE || inet->inet_num) { 2871da177e4SLinus Torvalds err = -EINVAL; 2881da177e4SLinus Torvalds goto out; 2891da177e4SLinus Torvalds } 2901da177e4SLinus Torvalds 2911da177e4SLinus Torvalds /* Check if the address belongs to the host. */ 2921da177e4SLinus Torvalds if (addr_type == IPV6_ADDR_MAPPED) { 29363d9950bSVlad Yasevich int chk_addr_ret; 29463d9950bSVlad Yasevich 295783ed5a7SVlad Yasevich /* Binding to v4-mapped address on a v6-only socket 296783ed5a7SVlad Yasevich * makes no sense 297783ed5a7SVlad Yasevich */ 298783ed5a7SVlad Yasevich if (np->ipv6only) { 299783ed5a7SVlad Yasevich err = -EINVAL; 300783ed5a7SVlad Yasevich goto out; 301783ed5a7SVlad Yasevich } 30263d9950bSVlad Yasevich 30363d9950bSVlad Yasevich /* Reproduce AF_INET checks to make the bindings consitant */ 3041da177e4SLinus Torvalds v4addr = addr->sin6_addr.s6_addr32[3]; 30563d9950bSVlad Yasevich chk_addr_ret = inet_addr_type(net, v4addr); 30663d9950bSVlad Yasevich if (!sysctl_ip_nonlocal_bind && 30763d9950bSVlad Yasevich !(inet->freebind || inet->transparent) && 30863d9950bSVlad Yasevich v4addr != htonl(INADDR_ANY) && 30963d9950bSVlad Yasevich chk_addr_ret != RTN_LOCAL && 31063d9950bSVlad Yasevich chk_addr_ret != RTN_MULTICAST && 311ca6982b8SBruno Prémont chk_addr_ret != RTN_BROADCAST) { 312ca6982b8SBruno Prémont err = -EADDRNOTAVAIL; 3131da177e4SLinus Torvalds goto out; 314ca6982b8SBruno Prémont } 3151da177e4SLinus Torvalds } else { 3161da177e4SLinus Torvalds if (addr_type != IPV6_ADDR_ANY) { 3171da177e4SLinus Torvalds struct net_device *dev = NULL; 3181da177e4SLinus Torvalds 31916ba5e8eSEric Dumazet rcu_read_lock(); 3201da177e4SLinus Torvalds if (addr_type & IPV6_ADDR_LINKLOCAL) { 3211da177e4SLinus Torvalds if (addr_len >= sizeof(struct sockaddr_in6) && 3221da177e4SLinus Torvalds addr->sin6_scope_id) { 3231da177e4SLinus Torvalds /* Override any existing binding, if another one 3241da177e4SLinus Torvalds * is supplied by user. 3251da177e4SLinus Torvalds */ 3261da177e4SLinus Torvalds sk->sk_bound_dev_if = addr->sin6_scope_id; 3271da177e4SLinus Torvalds } 3281da177e4SLinus Torvalds 3291da177e4SLinus Torvalds /* Binding to link-local address requires an interface */ 3301da177e4SLinus Torvalds if (!sk->sk_bound_dev_if) { 3311da177e4SLinus Torvalds err = -EINVAL; 33216ba5e8eSEric Dumazet goto out_unlock; 3331da177e4SLinus Torvalds } 33416ba5e8eSEric Dumazet dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if); 3351da177e4SLinus Torvalds if (!dev) { 3361da177e4SLinus Torvalds err = -ENODEV; 33716ba5e8eSEric Dumazet goto out_unlock; 3381da177e4SLinus Torvalds } 3391da177e4SLinus Torvalds } 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds /* ipv4 addr of the socket is invalid. Only the 3421da177e4SLinus Torvalds * unspecified and mapped address have a v4 equivalent. 3431da177e4SLinus Torvalds */ 3441da177e4SLinus Torvalds v4addr = LOOPBACK4_IPV6; 3451da177e4SLinus Torvalds if (!(addr_type & IPV6_ADDR_MULTICAST)) { 346075de939SBenjamin Thery if (!ipv6_chk_addr(net, &addr->sin6_addr, 347bfeade08SDaniel Lezcano dev, 0)) { 3481da177e4SLinus Torvalds err = -EADDRNOTAVAIL; 34916ba5e8eSEric Dumazet goto out_unlock; 3501da177e4SLinus Torvalds } 3511da177e4SLinus Torvalds } 35216ba5e8eSEric Dumazet rcu_read_unlock(); 3531da177e4SLinus Torvalds } 3541da177e4SLinus Torvalds } 3551da177e4SLinus Torvalds 356c720c7e8SEric Dumazet inet->inet_rcv_saddr = v4addr; 357c720c7e8SEric Dumazet inet->inet_saddr = v4addr; 3581da177e4SLinus Torvalds 3591da177e4SLinus Torvalds ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); 3601da177e4SLinus Torvalds 3611da177e4SLinus Torvalds if (!(addr_type & IPV6_ADDR_MULTICAST)) 3621da177e4SLinus Torvalds ipv6_addr_copy(&np->saddr, &addr->sin6_addr); 3631da177e4SLinus Torvalds 3641da177e4SLinus Torvalds /* Make sure we are allowed to bind here. */ 3651da177e4SLinus Torvalds if (sk->sk_prot->get_port(sk, snum)) { 3661da177e4SLinus Torvalds inet_reset_saddr(sk); 3671da177e4SLinus Torvalds err = -EADDRINUSE; 3681da177e4SLinus Torvalds goto out; 3691da177e4SLinus Torvalds } 3701da177e4SLinus Torvalds 3710f8d3c7aSVlad Yasevich if (addr_type != IPV6_ADDR_ANY) { 3721da177e4SLinus Torvalds sk->sk_userlocks |= SOCK_BINDADDR_LOCK; 3730f8d3c7aSVlad Yasevich if (addr_type != IPV6_ADDR_MAPPED) 3740f8d3c7aSVlad Yasevich np->ipv6only = 1; 3750f8d3c7aSVlad Yasevich } 3761da177e4SLinus Torvalds if (snum) 3771da177e4SLinus Torvalds sk->sk_userlocks |= SOCK_BINDPORT_LOCK; 378c720c7e8SEric Dumazet inet->inet_sport = htons(inet->inet_num); 379c720c7e8SEric Dumazet inet->inet_dport = 0; 380c720c7e8SEric Dumazet inet->inet_daddr = 0; 3811da177e4SLinus Torvalds out: 3821da177e4SLinus Torvalds release_sock(sk); 3831da177e4SLinus Torvalds return err; 38416ba5e8eSEric Dumazet out_unlock: 38516ba5e8eSEric Dumazet rcu_read_unlock(); 38616ba5e8eSEric Dumazet goto out; 3871da177e4SLinus Torvalds } 3881da177e4SLinus Torvalds 3897159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(inet6_bind); 3907159039aSYOSHIFUJI Hideaki 3911da177e4SLinus Torvalds int inet6_release(struct socket *sock) 3921da177e4SLinus Torvalds { 3931da177e4SLinus Torvalds struct sock *sk = sock->sk; 3941da177e4SLinus Torvalds 3951da177e4SLinus Torvalds if (sk == NULL) 3961da177e4SLinus Torvalds return -EINVAL; 3971da177e4SLinus Torvalds 3981da177e4SLinus Torvalds /* Free mc lists */ 3991da177e4SLinus Torvalds ipv6_sock_mc_close(sk); 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds /* Free ac lists */ 4021da177e4SLinus Torvalds ipv6_sock_ac_close(sk); 4031da177e4SLinus Torvalds 4041da177e4SLinus Torvalds return inet_release(sock); 4051da177e4SLinus Torvalds } 4061da177e4SLinus Torvalds 4077159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(inet6_release); 4087159039aSYOSHIFUJI Hideaki 4097d06b2e0SBrian Haley void inet6_destroy_sock(struct sock *sk) 4101da177e4SLinus Torvalds { 4111da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 4121da177e4SLinus Torvalds struct sk_buff *skb; 4131da177e4SLinus Torvalds struct ipv6_txoptions *opt; 4141da177e4SLinus Torvalds 4151da177e4SLinus Torvalds /* Release rx options */ 4161da177e4SLinus Torvalds 4171da177e4SLinus Torvalds if ((skb = xchg(&np->pktoptions, NULL)) != NULL) 4181da177e4SLinus Torvalds kfree_skb(skb); 4191da177e4SLinus Torvalds 4204b340ae2SBrian Haley if ((skb = xchg(&np->rxpmtu, NULL)) != NULL) 4214b340ae2SBrian Haley kfree_skb(skb); 4224b340ae2SBrian Haley 4231da177e4SLinus Torvalds /* Free flowlabels */ 4241da177e4SLinus Torvalds fl6_free_socklist(sk); 4251da177e4SLinus Torvalds 4261da177e4SLinus Torvalds /* Free tx options */ 4271da177e4SLinus Torvalds 4281da177e4SLinus Torvalds if ((opt = xchg(&np->opt, NULL)) != NULL) 4291da177e4SLinus Torvalds sock_kfree_s(sk, opt, opt->tot_len); 4301da177e4SLinus Torvalds } 4311da177e4SLinus Torvalds 4323cf3dc6cSArnaldo Carvalho de Melo EXPORT_SYMBOL_GPL(inet6_destroy_sock); 4333cf3dc6cSArnaldo Carvalho de Melo 4341da177e4SLinus Torvalds /* 4351da177e4SLinus Torvalds * This does both peername and sockname. 4361da177e4SLinus Torvalds */ 4371da177e4SLinus Torvalds 4381da177e4SLinus Torvalds int inet6_getname(struct socket *sock, struct sockaddr *uaddr, 4391da177e4SLinus Torvalds int *uaddr_len, int peer) 4401da177e4SLinus Torvalds { 4411da177e4SLinus Torvalds struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr; 4421da177e4SLinus Torvalds struct sock *sk = sock->sk; 4431da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 4441da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 4451da177e4SLinus Torvalds 4461da177e4SLinus Torvalds sin->sin6_family = AF_INET6; 4471da177e4SLinus Torvalds sin->sin6_flowinfo = 0; 4481da177e4SLinus Torvalds sin->sin6_scope_id = 0; 4491da177e4SLinus Torvalds if (peer) { 450c720c7e8SEric Dumazet if (!inet->inet_dport) 4511da177e4SLinus Torvalds return -ENOTCONN; 4521da177e4SLinus Torvalds if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && 4531da177e4SLinus Torvalds peer == 1) 4541da177e4SLinus Torvalds return -ENOTCONN; 455c720c7e8SEric Dumazet sin->sin6_port = inet->inet_dport; 4561da177e4SLinus Torvalds ipv6_addr_copy(&sin->sin6_addr, &np->daddr); 4571da177e4SLinus Torvalds if (np->sndflow) 4581da177e4SLinus Torvalds sin->sin6_flowinfo = np->flow_label; 4591da177e4SLinus Torvalds } else { 4601da177e4SLinus Torvalds if (ipv6_addr_any(&np->rcv_saddr)) 4611da177e4SLinus Torvalds ipv6_addr_copy(&sin->sin6_addr, &np->saddr); 4621da177e4SLinus Torvalds else 4631da177e4SLinus Torvalds ipv6_addr_copy(&sin->sin6_addr, &np->rcv_saddr); 4641da177e4SLinus Torvalds 465c720c7e8SEric Dumazet sin->sin6_port = inet->inet_sport; 4661da177e4SLinus Torvalds } 4671da177e4SLinus Torvalds if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL) 4681da177e4SLinus Torvalds sin->sin6_scope_id = sk->sk_bound_dev_if; 4691da177e4SLinus Torvalds *uaddr_len = sizeof(*sin); 4701da177e4SLinus Torvalds return(0); 4711da177e4SLinus Torvalds } 4721da177e4SLinus Torvalds 4737159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(inet6_getname); 4747159039aSYOSHIFUJI Hideaki 4751da177e4SLinus Torvalds int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 4761da177e4SLinus Torvalds { 4771da177e4SLinus Torvalds struct sock *sk = sock->sk; 4783b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(sk); 4791da177e4SLinus Torvalds 4801da177e4SLinus Torvalds switch(cmd) 4811da177e4SLinus Torvalds { 4821da177e4SLinus Torvalds case SIOCGSTAMP: 4831da177e4SLinus Torvalds return sock_get_timestamp(sk, (struct timeval __user *)arg); 4841da177e4SLinus Torvalds 485ae40eb1eSEric Dumazet case SIOCGSTAMPNS: 486ae40eb1eSEric Dumazet return sock_get_timestampns(sk, (struct timespec __user *)arg); 487ae40eb1eSEric Dumazet 4881da177e4SLinus Torvalds case SIOCADDRT: 4891da177e4SLinus Torvalds case SIOCDELRT: 4901da177e4SLinus Torvalds 4915578689aSDaniel Lezcano return(ipv6_route_ioctl(net, cmd, (void __user *)arg)); 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds case SIOCSIFADDR: 494af284937SDaniel Lezcano return addrconf_add_ifaddr(net, (void __user *) arg); 4951da177e4SLinus Torvalds case SIOCDIFADDR: 496af284937SDaniel Lezcano return addrconf_del_ifaddr(net, (void __user *) arg); 4971da177e4SLinus Torvalds case SIOCSIFDSTADDR: 498af284937SDaniel Lezcano return addrconf_set_dstaddr(net, (void __user *) arg); 4991da177e4SLinus Torvalds default: 500b5e5fa5eSChristoph Hellwig if (!sk->sk_prot->ioctl) 501b5e5fa5eSChristoph Hellwig return -ENOIOCTLCMD; 502b5e5fa5eSChristoph Hellwig return sk->sk_prot->ioctl(sk, cmd, arg); 5031da177e4SLinus Torvalds } 5041da177e4SLinus Torvalds /*NOTREACHED*/ 5051da177e4SLinus Torvalds return(0); 5061da177e4SLinus Torvalds } 5071da177e4SLinus Torvalds 5087159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(inet6_ioctl); 5097159039aSYOSHIFUJI Hideaki 51090ddc4f0SEric Dumazet const struct proto_ops inet6_stream_ops = { 5111da177e4SLinus Torvalds .family = PF_INET6, 5121da177e4SLinus Torvalds .owner = THIS_MODULE, 5131da177e4SLinus Torvalds .release = inet6_release, 5141da177e4SLinus Torvalds .bind = inet6_bind, 5151da177e4SLinus Torvalds .connect = inet_stream_connect, /* ok */ 5161da177e4SLinus Torvalds .socketpair = sock_no_socketpair, /* a do nothing */ 5171da177e4SLinus Torvalds .accept = inet_accept, /* ok */ 5181da177e4SLinus Torvalds .getname = inet6_getname, 5191da177e4SLinus Torvalds .poll = tcp_poll, /* ok */ 5201da177e4SLinus Torvalds .ioctl = inet6_ioctl, /* must change */ 5211da177e4SLinus Torvalds .listen = inet_listen, /* ok */ 5221da177e4SLinus Torvalds .shutdown = inet_shutdown, /* ok */ 5231da177e4SLinus Torvalds .setsockopt = sock_common_setsockopt, /* ok */ 5241da177e4SLinus Torvalds .getsockopt = sock_common_getsockopt, /* ok */ 5257ba42910SChangli Gao .sendmsg = inet_sendmsg, /* ok */ 5267ba42910SChangli Gao .recvmsg = inet_recvmsg, /* ok */ 527543d9cfeSArnaldo Carvalho de Melo .mmap = sock_no_mmap, 5287ba42910SChangli Gao .sendpage = inet_sendpage, 529a0974dd3SJens Axboe .splice_read = tcp_splice_read, 5303fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 5313fdadf7dSDmitry Mishin .compat_setsockopt = compat_sock_common_setsockopt, 5323fdadf7dSDmitry Mishin .compat_getsockopt = compat_sock_common_getsockopt, 5333fdadf7dSDmitry Mishin #endif 5341da177e4SLinus Torvalds }; 5351da177e4SLinus Torvalds 53690ddc4f0SEric Dumazet const struct proto_ops inet6_dgram_ops = { 5371da177e4SLinus Torvalds .family = PF_INET6, 5381da177e4SLinus Torvalds .owner = THIS_MODULE, 5391da177e4SLinus Torvalds .release = inet6_release, 5401da177e4SLinus Torvalds .bind = inet6_bind, 5411da177e4SLinus Torvalds .connect = inet_dgram_connect, /* ok */ 5421da177e4SLinus Torvalds .socketpair = sock_no_socketpair, /* a do nothing */ 5431da177e4SLinus Torvalds .accept = sock_no_accept, /* a do nothing */ 5441da177e4SLinus Torvalds .getname = inet6_getname, 5451da177e4SLinus Torvalds .poll = udp_poll, /* ok */ 5461da177e4SLinus Torvalds .ioctl = inet6_ioctl, /* must change */ 5471da177e4SLinus Torvalds .listen = sock_no_listen, /* ok */ 5481da177e4SLinus Torvalds .shutdown = inet_shutdown, /* ok */ 5491da177e4SLinus Torvalds .setsockopt = sock_common_setsockopt, /* ok */ 5501da177e4SLinus Torvalds .getsockopt = sock_common_getsockopt, /* ok */ 5511da177e4SLinus Torvalds .sendmsg = inet_sendmsg, /* ok */ 5527ba42910SChangli Gao .recvmsg = inet_recvmsg, /* ok */ 5531da177e4SLinus Torvalds .mmap = sock_no_mmap, 5541da177e4SLinus Torvalds .sendpage = sock_no_sendpage, 555543d9cfeSArnaldo Carvalho de Melo #ifdef CONFIG_COMPAT 556543d9cfeSArnaldo Carvalho de Melo .compat_setsockopt = compat_sock_common_setsockopt, 557543d9cfeSArnaldo Carvalho de Melo .compat_getsockopt = compat_sock_common_getsockopt, 558543d9cfeSArnaldo Carvalho de Melo #endif 5591da177e4SLinus Torvalds }; 5601da177e4SLinus Torvalds 561ec1b4cf7SStephen Hemminger static const struct net_proto_family inet6_family_ops = { 5621da177e4SLinus Torvalds .family = PF_INET6, 5631da177e4SLinus Torvalds .create = inet6_create, 5641da177e4SLinus Torvalds .owner = THIS_MODULE, 5651da177e4SLinus Torvalds }; 5661da177e4SLinus Torvalds 56787c3efbfSDaniel Lezcano int inet6_register_protosw(struct inet_protosw *p) 5681da177e4SLinus Torvalds { 5691da177e4SLinus Torvalds struct list_head *lh; 5701da177e4SLinus Torvalds struct inet_protosw *answer; 5711da177e4SLinus Torvalds struct list_head *last_perm; 57287c3efbfSDaniel Lezcano int protocol = p->protocol; 57387c3efbfSDaniel Lezcano int ret; 5741da177e4SLinus Torvalds 5751da177e4SLinus Torvalds spin_lock_bh(&inetsw6_lock); 5761da177e4SLinus Torvalds 57787c3efbfSDaniel Lezcano ret = -EINVAL; 5781da177e4SLinus Torvalds if (p->type >= SOCK_MAX) 5791da177e4SLinus Torvalds goto out_illegal; 5801da177e4SLinus Torvalds 5811da177e4SLinus Torvalds /* If we are trying to override a permanent protocol, bail. */ 5821da177e4SLinus Torvalds answer = NULL; 58387c3efbfSDaniel Lezcano ret = -EPERM; 5841da177e4SLinus Torvalds last_perm = &inetsw6[p->type]; 5851da177e4SLinus Torvalds list_for_each(lh, &inetsw6[p->type]) { 5861da177e4SLinus Torvalds answer = list_entry(lh, struct inet_protosw, list); 5871da177e4SLinus Torvalds 5881da177e4SLinus Torvalds /* Check only the non-wild match. */ 5891da177e4SLinus Torvalds if (INET_PROTOSW_PERMANENT & answer->flags) { 5901da177e4SLinus Torvalds if (protocol == answer->protocol) 5911da177e4SLinus Torvalds break; 5921da177e4SLinus Torvalds last_perm = lh; 5931da177e4SLinus Torvalds } 5941da177e4SLinus Torvalds 5951da177e4SLinus Torvalds answer = NULL; 5961da177e4SLinus Torvalds } 5971da177e4SLinus Torvalds if (answer) 5981da177e4SLinus Torvalds goto out_permanent; 5991da177e4SLinus Torvalds 6001da177e4SLinus Torvalds /* Add the new entry after the last permanent entry if any, so that 6011da177e4SLinus Torvalds * the new entry does not override a permanent entry when matched with 6021da177e4SLinus Torvalds * a wild-card protocol. But it is allowed to override any existing 6031da177e4SLinus Torvalds * non-permanent entry. This means that when we remove this entry, the 6041da177e4SLinus Torvalds * system automatically returns to the old behavior. 6051da177e4SLinus Torvalds */ 6061da177e4SLinus Torvalds list_add_rcu(&p->list, last_perm); 60787c3efbfSDaniel Lezcano ret = 0; 6081da177e4SLinus Torvalds out: 6091da177e4SLinus Torvalds spin_unlock_bh(&inetsw6_lock); 61087c3efbfSDaniel Lezcano return ret; 6111da177e4SLinus Torvalds 6121da177e4SLinus Torvalds out_permanent: 6131da177e4SLinus Torvalds printk(KERN_ERR "Attempt to override permanent protocol %d.\n", 6141da177e4SLinus Torvalds protocol); 6151da177e4SLinus Torvalds goto out; 6161da177e4SLinus Torvalds 6171da177e4SLinus Torvalds out_illegal: 6181da177e4SLinus Torvalds printk(KERN_ERR 6191da177e4SLinus Torvalds "Ignoring attempt to register invalid socket type %d.\n", 6201da177e4SLinus Torvalds p->type); 6211da177e4SLinus Torvalds goto out; 6221da177e4SLinus Torvalds } 6231da177e4SLinus Torvalds 6247159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(inet6_register_protosw); 6257159039aSYOSHIFUJI Hideaki 6261da177e4SLinus Torvalds void 6271da177e4SLinus Torvalds inet6_unregister_protosw(struct inet_protosw *p) 6281da177e4SLinus Torvalds { 6291da177e4SLinus Torvalds if (INET_PROTOSW_PERMANENT & p->flags) { 6301da177e4SLinus Torvalds printk(KERN_ERR 6311da177e4SLinus Torvalds "Attempt to unregister permanent protocol %d.\n", 6321da177e4SLinus Torvalds p->protocol); 6331da177e4SLinus Torvalds } else { 6341da177e4SLinus Torvalds spin_lock_bh(&inetsw6_lock); 6351da177e4SLinus Torvalds list_del_rcu(&p->list); 6361da177e4SLinus Torvalds spin_unlock_bh(&inetsw6_lock); 6371da177e4SLinus Torvalds 6381da177e4SLinus Torvalds synchronize_net(); 6391da177e4SLinus Torvalds } 6401da177e4SLinus Torvalds } 6411da177e4SLinus Torvalds 6427159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(inet6_unregister_protosw); 6437159039aSYOSHIFUJI Hideaki 644b9750ce1SArnaldo Carvalho de Melo int inet6_sk_rebuild_header(struct sock *sk) 645b9750ce1SArnaldo Carvalho de Melo { 646b9750ce1SArnaldo Carvalho de Melo int err; 647b9750ce1SArnaldo Carvalho de Melo struct dst_entry *dst; 648b9750ce1SArnaldo Carvalho de Melo struct ipv6_pinfo *np = inet6_sk(sk); 649b9750ce1SArnaldo Carvalho de Melo 650b9750ce1SArnaldo Carvalho de Melo dst = __sk_dst_check(sk, np->dst_cookie); 651b9750ce1SArnaldo Carvalho de Melo 652b9750ce1SArnaldo Carvalho de Melo if (dst == NULL) { 653b9750ce1SArnaldo Carvalho de Melo struct inet_sock *inet = inet_sk(sk); 65420c59de2SArnaud Ebalard struct in6_addr *final_p, final; 655b9750ce1SArnaldo Carvalho de Melo struct flowi fl; 656b9750ce1SArnaldo Carvalho de Melo 657b9750ce1SArnaldo Carvalho de Melo memset(&fl, 0, sizeof(fl)); 658b9750ce1SArnaldo Carvalho de Melo fl.proto = sk->sk_protocol; 659b9750ce1SArnaldo Carvalho de Melo ipv6_addr_copy(&fl.fl6_dst, &np->daddr); 660b9750ce1SArnaldo Carvalho de Melo ipv6_addr_copy(&fl.fl6_src, &np->saddr); 661b9750ce1SArnaldo Carvalho de Melo fl.fl6_flowlabel = np->flow_label; 662b9750ce1SArnaldo Carvalho de Melo fl.oif = sk->sk_bound_dev_if; 66351953d5bSBrian Haley fl.mark = sk->sk_mark; 664c720c7e8SEric Dumazet fl.fl_ip_dport = inet->inet_dport; 665c720c7e8SEric Dumazet fl.fl_ip_sport = inet->inet_sport; 666beb8d13bSVenkat Yekkirala security_sk_classify_flow(sk, &fl); 667b9750ce1SArnaldo Carvalho de Melo 66820c59de2SArnaud Ebalard final_p = fl6_update_dst(&fl, np->opt, &final); 669b9750ce1SArnaldo Carvalho de Melo 670b9750ce1SArnaldo Carvalho de Melo err = ip6_dst_lookup(sk, &dst, &fl); 671b9750ce1SArnaldo Carvalho de Melo if (err) { 672b9750ce1SArnaldo Carvalho de Melo sk->sk_route_caps = 0; 673b9750ce1SArnaldo Carvalho de Melo return err; 674b9750ce1SArnaldo Carvalho de Melo } 675b9750ce1SArnaldo Carvalho de Melo if (final_p) 676b9750ce1SArnaldo Carvalho de Melo ipv6_addr_copy(&fl.fl6_dst, final_p); 677b9750ce1SArnaldo Carvalho de Melo 67852479b62SAlexey Dobriyan if ((err = xfrm_lookup(sock_net(sk), &dst, &fl, sk, 0)) < 0) { 679b9750ce1SArnaldo Carvalho de Melo sk->sk_err_soft = -err; 680b9750ce1SArnaldo Carvalho de Melo return err; 681b9750ce1SArnaldo Carvalho de Melo } 682b9750ce1SArnaldo Carvalho de Melo 6838e1ef0a9SYOSHIFUJI Hideaki __ip6_dst_store(sk, dst, NULL, NULL); 684b9750ce1SArnaldo Carvalho de Melo } 685b9750ce1SArnaldo Carvalho de Melo 686b9750ce1SArnaldo Carvalho de Melo return 0; 687b9750ce1SArnaldo Carvalho de Melo } 688b9750ce1SArnaldo Carvalho de Melo 689b9750ce1SArnaldo Carvalho de Melo EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header); 690b9750ce1SArnaldo Carvalho de Melo 691399c07deSArnaldo Carvalho de Melo int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb) 692399c07deSArnaldo Carvalho de Melo { 693399c07deSArnaldo Carvalho de Melo struct ipv6_pinfo *np = inet6_sk(sk); 694399c07deSArnaldo Carvalho de Melo struct inet6_skb_parm *opt = IP6CB(skb); 695399c07deSArnaldo Carvalho de Melo 696399c07deSArnaldo Carvalho de Melo if (np->rxopt.all) { 697399c07deSArnaldo Carvalho de Melo if ((opt->hop && (np->rxopt.bits.hopopts || 698399c07deSArnaldo Carvalho de Melo np->rxopt.bits.ohopopts)) || 699d56f90a7SArnaldo Carvalho de Melo ((IPV6_FLOWINFO_MASK & 700d56f90a7SArnaldo Carvalho de Melo *(__be32 *)skb_network_header(skb)) && 701399c07deSArnaldo Carvalho de Melo np->rxopt.bits.rxflow) || 702399c07deSArnaldo Carvalho de Melo (opt->srcrt && (np->rxopt.bits.srcrt || 703399c07deSArnaldo Carvalho de Melo np->rxopt.bits.osrcrt)) || 704399c07deSArnaldo Carvalho de Melo ((opt->dst1 || opt->dst0) && 705399c07deSArnaldo Carvalho de Melo (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts))) 706399c07deSArnaldo Carvalho de Melo return 1; 707399c07deSArnaldo Carvalho de Melo } 708399c07deSArnaldo Carvalho de Melo return 0; 709399c07deSArnaldo Carvalho de Melo } 710399c07deSArnaldo Carvalho de Melo 711399c07deSArnaldo Carvalho de Melo EXPORT_SYMBOL_GPL(ipv6_opt_accepted); 712399c07deSArnaldo Carvalho de Melo 713787e9208SHerbert Xu static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto) 714662397fdSYOSHIFUJI Hideaki { 71541135cc8SAlexey Dobriyan const struct inet6_protocol *ops = NULL; 716662397fdSYOSHIFUJI Hideaki 717662397fdSYOSHIFUJI Hideaki for (;;) { 718662397fdSYOSHIFUJI Hideaki struct ipv6_opt_hdr *opth; 719662397fdSYOSHIFUJI Hideaki int len; 720662397fdSYOSHIFUJI Hideaki 721662397fdSYOSHIFUJI Hideaki if (proto != NEXTHDR_HOP) { 722662397fdSYOSHIFUJI Hideaki ops = rcu_dereference(inet6_protos[proto]); 723662397fdSYOSHIFUJI Hideaki 724662397fdSYOSHIFUJI Hideaki if (unlikely(!ops)) 725662397fdSYOSHIFUJI Hideaki break; 726662397fdSYOSHIFUJI Hideaki 727662397fdSYOSHIFUJI Hideaki if (!(ops->flags & INET6_PROTO_GSO_EXTHDR)) 728662397fdSYOSHIFUJI Hideaki break; 729662397fdSYOSHIFUJI Hideaki } 730662397fdSYOSHIFUJI Hideaki 731662397fdSYOSHIFUJI Hideaki if (unlikely(!pskb_may_pull(skb, 8))) 732662397fdSYOSHIFUJI Hideaki break; 733662397fdSYOSHIFUJI Hideaki 734662397fdSYOSHIFUJI Hideaki opth = (void *)skb->data; 735662397fdSYOSHIFUJI Hideaki len = ipv6_optlen(opth); 736662397fdSYOSHIFUJI Hideaki 737662397fdSYOSHIFUJI Hideaki if (unlikely(!pskb_may_pull(skb, len))) 738662397fdSYOSHIFUJI Hideaki break; 739662397fdSYOSHIFUJI Hideaki 740662397fdSYOSHIFUJI Hideaki proto = opth->nexthdr; 741662397fdSYOSHIFUJI Hideaki __skb_pull(skb, len); 742662397fdSYOSHIFUJI Hideaki } 743662397fdSYOSHIFUJI Hideaki 744787e9208SHerbert Xu return proto; 745662397fdSYOSHIFUJI Hideaki } 746662397fdSYOSHIFUJI Hideaki 747662397fdSYOSHIFUJI Hideaki static int ipv6_gso_send_check(struct sk_buff *skb) 748662397fdSYOSHIFUJI Hideaki { 749662397fdSYOSHIFUJI Hideaki struct ipv6hdr *ipv6h; 75041135cc8SAlexey Dobriyan const struct inet6_protocol *ops; 751662397fdSYOSHIFUJI Hideaki int err = -EINVAL; 752662397fdSYOSHIFUJI Hideaki 753662397fdSYOSHIFUJI Hideaki if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) 754662397fdSYOSHIFUJI Hideaki goto out; 755662397fdSYOSHIFUJI Hideaki 756662397fdSYOSHIFUJI Hideaki ipv6h = ipv6_hdr(skb); 757662397fdSYOSHIFUJI Hideaki __skb_pull(skb, sizeof(*ipv6h)); 758662397fdSYOSHIFUJI Hideaki err = -EPROTONOSUPPORT; 759662397fdSYOSHIFUJI Hideaki 760662397fdSYOSHIFUJI Hideaki rcu_read_lock(); 761787e9208SHerbert Xu ops = rcu_dereference(inet6_protos[ 762787e9208SHerbert Xu ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr)]); 763787e9208SHerbert Xu 764662397fdSYOSHIFUJI Hideaki if (likely(ops && ops->gso_send_check)) { 765662397fdSYOSHIFUJI Hideaki skb_reset_transport_header(skb); 766662397fdSYOSHIFUJI Hideaki err = ops->gso_send_check(skb); 767662397fdSYOSHIFUJI Hideaki } 768662397fdSYOSHIFUJI Hideaki rcu_read_unlock(); 769662397fdSYOSHIFUJI Hideaki 770662397fdSYOSHIFUJI Hideaki out: 771662397fdSYOSHIFUJI Hideaki return err; 772662397fdSYOSHIFUJI Hideaki } 773662397fdSYOSHIFUJI Hideaki 774662397fdSYOSHIFUJI Hideaki static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features) 775662397fdSYOSHIFUJI Hideaki { 776662397fdSYOSHIFUJI Hideaki struct sk_buff *segs = ERR_PTR(-EINVAL); 777662397fdSYOSHIFUJI Hideaki struct ipv6hdr *ipv6h; 77841135cc8SAlexey Dobriyan const struct inet6_protocol *ops; 779ba735425SSridhar Samudrala int proto; 780ba735425SSridhar Samudrala struct frag_hdr *fptr; 781ba735425SSridhar Samudrala unsigned int unfrag_ip6hlen; 782ba735425SSridhar Samudrala u8 *prevhdr; 783ba735425SSridhar Samudrala int offset = 0; 784662397fdSYOSHIFUJI Hideaki 785662397fdSYOSHIFUJI Hideaki if (!(features & NETIF_F_V6_CSUM)) 786662397fdSYOSHIFUJI Hideaki features &= ~NETIF_F_SG; 787662397fdSYOSHIFUJI Hideaki 788662397fdSYOSHIFUJI Hideaki if (unlikely(skb_shinfo(skb)->gso_type & 789662397fdSYOSHIFUJI Hideaki ~(SKB_GSO_UDP | 790662397fdSYOSHIFUJI Hideaki SKB_GSO_DODGY | 791662397fdSYOSHIFUJI Hideaki SKB_GSO_TCP_ECN | 792662397fdSYOSHIFUJI Hideaki SKB_GSO_TCPV6 | 793662397fdSYOSHIFUJI Hideaki 0))) 794662397fdSYOSHIFUJI Hideaki goto out; 795662397fdSYOSHIFUJI Hideaki 796662397fdSYOSHIFUJI Hideaki if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) 797662397fdSYOSHIFUJI Hideaki goto out; 798662397fdSYOSHIFUJI Hideaki 799662397fdSYOSHIFUJI Hideaki ipv6h = ipv6_hdr(skb); 800662397fdSYOSHIFUJI Hideaki __skb_pull(skb, sizeof(*ipv6h)); 801662397fdSYOSHIFUJI Hideaki segs = ERR_PTR(-EPROTONOSUPPORT); 802662397fdSYOSHIFUJI Hideaki 803ba735425SSridhar Samudrala proto = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr); 804662397fdSYOSHIFUJI Hideaki rcu_read_lock(); 805ba735425SSridhar Samudrala ops = rcu_dereference(inet6_protos[proto]); 806662397fdSYOSHIFUJI Hideaki if (likely(ops && ops->gso_segment)) { 807662397fdSYOSHIFUJI Hideaki skb_reset_transport_header(skb); 808662397fdSYOSHIFUJI Hideaki segs = ops->gso_segment(skb, features); 809662397fdSYOSHIFUJI Hideaki } 810662397fdSYOSHIFUJI Hideaki rcu_read_unlock(); 811662397fdSYOSHIFUJI Hideaki 812662397fdSYOSHIFUJI Hideaki if (unlikely(IS_ERR(segs))) 813662397fdSYOSHIFUJI Hideaki goto out; 814662397fdSYOSHIFUJI Hideaki 815662397fdSYOSHIFUJI Hideaki for (skb = segs; skb; skb = skb->next) { 816662397fdSYOSHIFUJI Hideaki ipv6h = ipv6_hdr(skb); 817662397fdSYOSHIFUJI Hideaki ipv6h->payload_len = htons(skb->len - skb->mac_len - 818662397fdSYOSHIFUJI Hideaki sizeof(*ipv6h)); 819ba735425SSridhar Samudrala if (proto == IPPROTO_UDP) { 820ba735425SSridhar Samudrala unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr); 821ba735425SSridhar Samudrala fptr = (struct frag_hdr *)(skb_network_header(skb) + 822ba735425SSridhar Samudrala unfrag_ip6hlen); 823ba735425SSridhar Samudrala fptr->frag_off = htons(offset); 824ba735425SSridhar Samudrala if (skb->next != NULL) 825ba735425SSridhar Samudrala fptr->frag_off |= htons(IP6_MF); 826ba735425SSridhar Samudrala offset += (ntohs(ipv6h->payload_len) - 827ba735425SSridhar Samudrala sizeof(struct frag_hdr)); 828ba735425SSridhar Samudrala } 829662397fdSYOSHIFUJI Hideaki } 830662397fdSYOSHIFUJI Hideaki 831662397fdSYOSHIFUJI Hideaki out: 832662397fdSYOSHIFUJI Hideaki return segs; 833662397fdSYOSHIFUJI Hideaki } 834662397fdSYOSHIFUJI Hideaki 835787e9208SHerbert Xu struct ipv6_gro_cb { 836787e9208SHerbert Xu struct napi_gro_cb napi; 837787e9208SHerbert Xu int proto; 838787e9208SHerbert Xu }; 839787e9208SHerbert Xu 840787e9208SHerbert Xu #define IPV6_GRO_CB(skb) ((struct ipv6_gro_cb *)(skb)->cb) 841787e9208SHerbert Xu 842787e9208SHerbert Xu static struct sk_buff **ipv6_gro_receive(struct sk_buff **head, 843787e9208SHerbert Xu struct sk_buff *skb) 844787e9208SHerbert Xu { 84541135cc8SAlexey Dobriyan const struct inet6_protocol *ops; 846787e9208SHerbert Xu struct sk_buff **pp = NULL; 847787e9208SHerbert Xu struct sk_buff *p; 848787e9208SHerbert Xu struct ipv6hdr *iph; 849787e9208SHerbert Xu unsigned int nlen; 850a5b1cf28SHerbert Xu unsigned int hlen; 851a5b1cf28SHerbert Xu unsigned int off; 852787e9208SHerbert Xu int flush = 1; 853787e9208SHerbert Xu int proto; 854ebad18e9SHerbert Xu __wsum csum; 855787e9208SHerbert Xu 856a5b1cf28SHerbert Xu off = skb_gro_offset(skb); 857a5b1cf28SHerbert Xu hlen = off + sizeof(*iph); 858a5b1cf28SHerbert Xu iph = skb_gro_header_fast(skb, off); 859a5b1cf28SHerbert Xu if (skb_gro_header_hard(skb, hlen)) { 860a5b1cf28SHerbert Xu iph = skb_gro_header_slow(skb, hlen, off); 86186911732SHerbert Xu if (unlikely(!iph)) 862787e9208SHerbert Xu goto out; 863a5b1cf28SHerbert Xu } 864787e9208SHerbert Xu 86586911732SHerbert Xu skb_gro_pull(skb, sizeof(*iph)); 86686911732SHerbert Xu skb_set_transport_header(skb, skb_gro_offset(skb)); 867787e9208SHerbert Xu 86886911732SHerbert Xu flush += ntohs(iph->payload_len) != skb_gro_len(skb); 869787e9208SHerbert Xu 870787e9208SHerbert Xu rcu_read_lock(); 87186911732SHerbert Xu proto = iph->nexthdr; 872787e9208SHerbert Xu ops = rcu_dereference(inet6_protos[proto]); 87386911732SHerbert Xu if (!ops || !ops->gro_receive) { 87486911732SHerbert Xu __pskb_pull(skb, skb_gro_offset(skb)); 87586911732SHerbert Xu proto = ipv6_gso_pull_exthdrs(skb, proto); 87686911732SHerbert Xu skb_gro_pull(skb, -skb_transport_offset(skb)); 87786911732SHerbert Xu skb_reset_transport_header(skb); 87886911732SHerbert Xu __skb_push(skb, skb_gro_offset(skb)); 87986911732SHerbert Xu 880787e9208SHerbert Xu if (!ops || !ops->gro_receive) 881787e9208SHerbert Xu goto out_unlock; 882787e9208SHerbert Xu 88386911732SHerbert Xu iph = ipv6_hdr(skb); 88486911732SHerbert Xu } 88586911732SHerbert Xu 88686911732SHerbert Xu IPV6_GRO_CB(skb)->proto = proto; 88786911732SHerbert Xu 888787e9208SHerbert Xu flush--; 889787e9208SHerbert Xu nlen = skb_network_header_len(skb); 890787e9208SHerbert Xu 891787e9208SHerbert Xu for (p = *head; p; p = p->next) { 892787e9208SHerbert Xu struct ipv6hdr *iph2; 893787e9208SHerbert Xu 894787e9208SHerbert Xu if (!NAPI_GRO_CB(p)->same_flow) 895787e9208SHerbert Xu continue; 896787e9208SHerbert Xu 897787e9208SHerbert Xu iph2 = ipv6_hdr(p); 898787e9208SHerbert Xu 899787e9208SHerbert Xu /* All fields must match except length. */ 900787e9208SHerbert Xu if (nlen != skb_network_header_len(p) || 901787e9208SHerbert Xu memcmp(iph, iph2, offsetof(struct ipv6hdr, payload_len)) || 902787e9208SHerbert Xu memcmp(&iph->nexthdr, &iph2->nexthdr, 903787e9208SHerbert Xu nlen - offsetof(struct ipv6hdr, nexthdr))) { 904787e9208SHerbert Xu NAPI_GRO_CB(p)->same_flow = 0; 905787e9208SHerbert Xu continue; 906787e9208SHerbert Xu } 907787e9208SHerbert Xu 908787e9208SHerbert Xu NAPI_GRO_CB(p)->flush |= flush; 909787e9208SHerbert Xu } 910787e9208SHerbert Xu 911787e9208SHerbert Xu NAPI_GRO_CB(skb)->flush |= flush; 912787e9208SHerbert Xu 913ebad18e9SHerbert Xu csum = skb->csum; 914ebad18e9SHerbert Xu skb_postpull_rcsum(skb, iph, skb_network_header_len(skb)); 915ebad18e9SHerbert Xu 916787e9208SHerbert Xu pp = ops->gro_receive(head, skb); 917787e9208SHerbert Xu 918ebad18e9SHerbert Xu skb->csum = csum; 919ebad18e9SHerbert Xu 920787e9208SHerbert Xu out_unlock: 921787e9208SHerbert Xu rcu_read_unlock(); 922787e9208SHerbert Xu 923787e9208SHerbert Xu out: 924787e9208SHerbert Xu NAPI_GRO_CB(skb)->flush |= flush; 925787e9208SHerbert Xu 926787e9208SHerbert Xu return pp; 927787e9208SHerbert Xu } 928787e9208SHerbert Xu 929787e9208SHerbert Xu static int ipv6_gro_complete(struct sk_buff *skb) 930787e9208SHerbert Xu { 93141135cc8SAlexey Dobriyan const struct inet6_protocol *ops; 932787e9208SHerbert Xu struct ipv6hdr *iph = ipv6_hdr(skb); 933787e9208SHerbert Xu int err = -ENOSYS; 934787e9208SHerbert Xu 935787e9208SHerbert Xu iph->payload_len = htons(skb->len - skb_network_offset(skb) - 936787e9208SHerbert Xu sizeof(*iph)); 937787e9208SHerbert Xu 938787e9208SHerbert Xu rcu_read_lock(); 939787e9208SHerbert Xu ops = rcu_dereference(inet6_protos[IPV6_GRO_CB(skb)->proto]); 940787e9208SHerbert Xu if (WARN_ON(!ops || !ops->gro_complete)) 941787e9208SHerbert Xu goto out_unlock; 942787e9208SHerbert Xu 943787e9208SHerbert Xu err = ops->gro_complete(skb); 944787e9208SHerbert Xu 945787e9208SHerbert Xu out_unlock: 946787e9208SHerbert Xu rcu_read_unlock(); 947787e9208SHerbert Xu 948787e9208SHerbert Xu return err; 949787e9208SHerbert Xu } 950787e9208SHerbert Xu 9517546dd97SStephen Hemminger static struct packet_type ipv6_packet_type __read_mostly = { 95209640e63SHarvey Harrison .type = cpu_to_be16(ETH_P_IPV6), 953662397fdSYOSHIFUJI Hideaki .func = ipv6_rcv, 954662397fdSYOSHIFUJI Hideaki .gso_send_check = ipv6_gso_send_check, 955662397fdSYOSHIFUJI Hideaki .gso_segment = ipv6_gso_segment, 956787e9208SHerbert Xu .gro_receive = ipv6_gro_receive, 957787e9208SHerbert Xu .gro_complete = ipv6_gro_complete, 958662397fdSYOSHIFUJI Hideaki }; 959662397fdSYOSHIFUJI Hideaki 960662397fdSYOSHIFUJI Hideaki static int __init ipv6_packet_init(void) 961662397fdSYOSHIFUJI Hideaki { 962662397fdSYOSHIFUJI Hideaki dev_add_pack(&ipv6_packet_type); 963662397fdSYOSHIFUJI Hideaki return 0; 964662397fdSYOSHIFUJI Hideaki } 965662397fdSYOSHIFUJI Hideaki 966662397fdSYOSHIFUJI Hideaki static void ipv6_packet_cleanup(void) 967662397fdSYOSHIFUJI Hideaki { 968662397fdSYOSHIFUJI Hideaki dev_remove_pack(&ipv6_packet_type); 969662397fdSYOSHIFUJI Hideaki } 970662397fdSYOSHIFUJI Hideaki 971e43291cbSDenis V. Lunev static int __net_init ipv6_init_mibs(struct net *net) 972e43291cbSDenis V. Lunev { 9737d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.udp_stats_in6, 9741823e4c8SEric Dumazet sizeof(struct udp_mib), 9751823e4c8SEric Dumazet __alignof__(struct udp_mib)) < 0) 9760c7ed677SDenis V. Lunev return -ENOMEM; 9777d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.udplite_stats_in6, 9781823e4c8SEric Dumazet sizeof(struct udp_mib), 9791823e4c8SEric Dumazet __alignof__(struct udp_mib)) < 0) 980be713a44SDenis V. Lunev goto err_udplite_mib; 9817d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.ipv6_statistics, 9821823e4c8SEric Dumazet sizeof(struct ipstats_mib), 9831823e4c8SEric Dumazet __alignof__(struct ipstats_mib)) < 0) 9849261e537SDenis V. Lunev goto err_ip_mib; 9857d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.icmpv6_statistics, 9861823e4c8SEric Dumazet sizeof(struct icmpv6_mib), 9871823e4c8SEric Dumazet __alignof__(struct icmpv6_mib)) < 0) 9889261e537SDenis V. Lunev goto err_icmp_mib; 9897d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.icmpv6msg_statistics, 9901823e4c8SEric Dumazet sizeof(struct icmpv6msg_mib), 9911823e4c8SEric Dumazet __alignof__(struct icmpv6msg_mib)) < 0) 9929261e537SDenis V. Lunev goto err_icmpmsg_mib; 993e43291cbSDenis V. Lunev return 0; 994be713a44SDenis V. Lunev 9959261e537SDenis V. Lunev err_icmpmsg_mib: 9967d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics); 9979261e537SDenis V. Lunev err_icmp_mib: 9987d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.ipv6_statistics); 9999261e537SDenis V. Lunev err_ip_mib: 10007d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6); 1001be713a44SDenis V. Lunev err_udplite_mib: 10027d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.udp_stats_in6); 1003be713a44SDenis V. Lunev return -ENOMEM; 1004e43291cbSDenis V. Lunev } 1005e43291cbSDenis V. Lunev 10062c8c1e72SAlexey Dobriyan static void ipv6_cleanup_mibs(struct net *net) 1007e43291cbSDenis V. Lunev { 10087d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.udp_stats_in6); 10097d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6); 10107d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.ipv6_statistics); 10117d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics); 10127d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.icmpv6msg_statistics); 1013e43291cbSDenis V. Lunev } 1014e43291cbSDenis V. Lunev 1015e7dc8494SAlexey Dobriyan static int __net_init inet6_net_init(struct net *net) 101681c1c178SDaniel Lezcano { 10170c96d8c5SDaniel Lezcano int err = 0; 10180c96d8c5SDaniel Lezcano 101999bc9c4eSDaniel Lezcano net->ipv6.sysctl.bindv6only = 0; 102041a76906SDaniel Lezcano net->ipv6.sysctl.icmpv6_time = 1*HZ; 1021e71e0349SDaniel Lezcano 1022e43291cbSDenis V. Lunev err = ipv6_init_mibs(net); 1023e43291cbSDenis V. Lunev if (err) 1024e43291cbSDenis V. Lunev return err; 10250c96d8c5SDaniel Lezcano #ifdef CONFIG_PROC_FS 10260c96d8c5SDaniel Lezcano err = udp6_proc_init(net); 10270c96d8c5SDaniel Lezcano if (err) 10280c96d8c5SDaniel Lezcano goto out; 10296f8b13bcSDaniel Lezcano err = tcp6_proc_init(net); 10306f8b13bcSDaniel Lezcano if (err) 10316f8b13bcSDaniel Lezcano goto proc_tcp6_fail; 10326ab57e7eSDaniel Lezcano err = ac6_proc_init(net); 10336ab57e7eSDaniel Lezcano if (err) 10346ab57e7eSDaniel Lezcano goto proc_ac6_fail; 10350c96d8c5SDaniel Lezcano #endif 10360c96d8c5SDaniel Lezcano return err; 10376f8b13bcSDaniel Lezcano 10386f8b13bcSDaniel Lezcano #ifdef CONFIG_PROC_FS 10396ab57e7eSDaniel Lezcano proc_ac6_fail: 10406ab57e7eSDaniel Lezcano tcp6_proc_exit(net); 10416f8b13bcSDaniel Lezcano proc_tcp6_fail: 10426f8b13bcSDaniel Lezcano udp6_proc_exit(net); 1043e43291cbSDenis V. Lunev out: 1044e43291cbSDenis V. Lunev ipv6_cleanup_mibs(net); 1045e43291cbSDenis V. Lunev return err; 10466f8b13bcSDaniel Lezcano #endif 104781c1c178SDaniel Lezcano } 104881c1c178SDaniel Lezcano 10492c8c1e72SAlexey Dobriyan static void __net_exit inet6_net_exit(struct net *net) 105081c1c178SDaniel Lezcano { 10510c96d8c5SDaniel Lezcano #ifdef CONFIG_PROC_FS 10520c96d8c5SDaniel Lezcano udp6_proc_exit(net); 10536f8b13bcSDaniel Lezcano tcp6_proc_exit(net); 10546ab57e7eSDaniel Lezcano ac6_proc_exit(net); 10550c96d8c5SDaniel Lezcano #endif 1056e43291cbSDenis V. Lunev ipv6_cleanup_mibs(net); 105781c1c178SDaniel Lezcano } 105881c1c178SDaniel Lezcano 105981c1c178SDaniel Lezcano static struct pernet_operations inet6_net_ops = { 106081c1c178SDaniel Lezcano .init = inet6_net_init, 106181c1c178SDaniel Lezcano .exit = inet6_net_exit, 106281c1c178SDaniel Lezcano }; 106381c1c178SDaniel Lezcano 10641da177e4SLinus Torvalds static int __init inet6_init(void) 10651da177e4SLinus Torvalds { 10661da177e4SLinus Torvalds struct sk_buff *dummy_skb; 10671da177e4SLinus Torvalds struct list_head *r; 1068fe7ca2e1SBrian Haley int err = 0; 10691da177e4SLinus Torvalds 1070ef047f5eSYOSHIFUJI Hideaki BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb)); 1071ef047f5eSYOSHIFUJI Hideaki 1072fe7ca2e1SBrian Haley /* Register the socket-side information for inet6_create. */ 1073fe7ca2e1SBrian Haley for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) 1074fe7ca2e1SBrian Haley INIT_LIST_HEAD(r); 1075fe7ca2e1SBrian Haley 107656d417b1SBrian Haley if (disable_ipv6_mod) { 1077fe7ca2e1SBrian Haley printk(KERN_INFO 1078fe7ca2e1SBrian Haley "IPv6: Loaded, but administratively disabled, " 1079fe7ca2e1SBrian Haley "reboot required to enable\n"); 1080fe7ca2e1SBrian Haley goto out; 1081fe7ca2e1SBrian Haley } 1082fe7ca2e1SBrian Haley 10831da177e4SLinus Torvalds err = proto_register(&tcpv6_prot, 1); 10841da177e4SLinus Torvalds if (err) 10851da177e4SLinus Torvalds goto out; 10861da177e4SLinus Torvalds 10871da177e4SLinus Torvalds err = proto_register(&udpv6_prot, 1); 10881da177e4SLinus Torvalds if (err) 10891da177e4SLinus Torvalds goto out_unregister_tcp_proto; 10901da177e4SLinus Torvalds 1091ba4e58ecSGerrit Renker err = proto_register(&udplitev6_prot, 1); 10921da177e4SLinus Torvalds if (err) 10931da177e4SLinus Torvalds goto out_unregister_udp_proto; 10941da177e4SLinus Torvalds 1095ba4e58ecSGerrit Renker err = proto_register(&rawv6_prot, 1); 1096ba4e58ecSGerrit Renker if (err) 1097ba4e58ecSGerrit Renker goto out_unregister_udplite_proto; 1098ba4e58ecSGerrit Renker 10991da177e4SLinus Torvalds 11001da177e4SLinus Torvalds /* We MUST register RAW sockets before we create the ICMP6, 11011da177e4SLinus Torvalds * IGMP6, or NDISC control sockets. 11021da177e4SLinus Torvalds */ 11037f4e4868SDaniel Lezcano err = rawv6_init(); 11047f4e4868SDaniel Lezcano if (err) 11057f4e4868SDaniel Lezcano goto out_unregister_raw_proto; 11061da177e4SLinus Torvalds 11071da177e4SLinus Torvalds /* Register the family here so that the init calls below will 11081da177e4SLinus Torvalds * be able to create sockets. (?? is this dangerous ??) 11091da177e4SLinus Torvalds */ 11108eb55910SDavid S. Miller err = sock_register(&inet6_family_ops); 11118eb55910SDavid S. Miller if (err) 11127f4e4868SDaniel Lezcano goto out_sock_register_fail; 11131da177e4SLinus Torvalds 1114eeb61f71SAl Viro #ifdef CONFIG_SYSCTL 1115eeb61f71SAl Viro err = ipv6_static_sysctl_register(); 1116eeb61f71SAl Viro if (err) 1117eeb61f71SAl Viro goto static_sysctl_fail; 1118eeb61f71SAl Viro #endif 11191da177e4SLinus Torvalds /* 11201da177e4SLinus Torvalds * ipngwg API draft makes clear that the correct semantics 11211da177e4SLinus Torvalds * for TCP and UDP is to consider one TCP and UDP instance 11221da177e4SLinus Torvalds * in a host availiable by both INET and INET6 APIs and 11231da177e4SLinus Torvalds * able to communicate via both network protocols. 11241da177e4SLinus Torvalds */ 11251da177e4SLinus Torvalds 112681c1c178SDaniel Lezcano err = register_pernet_subsys(&inet6_net_ops); 112781c1c178SDaniel Lezcano if (err) 112881c1c178SDaniel Lezcano goto register_pernet_fail; 11299b0f976fSDenis V. Lunev err = icmpv6_init(); 11301da177e4SLinus Torvalds if (err) 11311da177e4SLinus Torvalds goto icmp_fail; 1132623d1a1aSWang Chen err = ip6_mr_init(); 1133623d1a1aSWang Chen if (err) 1134623d1a1aSWang Chen goto ipmr_fail; 11359b0f976fSDenis V. Lunev err = ndisc_init(); 11361da177e4SLinus Torvalds if (err) 11371da177e4SLinus Torvalds goto ndisc_fail; 11389b0f976fSDenis V. Lunev err = igmp6_init(); 11391da177e4SLinus Torvalds if (err) 11401da177e4SLinus Torvalds goto igmp_fail; 11412cc7d573SHarald Welte err = ipv6_netfilter_init(); 11422cc7d573SHarald Welte if (err) 11432cc7d573SHarald Welte goto netfilter_fail; 11441da177e4SLinus Torvalds /* Create /proc/foo6 entries. */ 11451da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 11461da177e4SLinus Torvalds err = -ENOMEM; 11471da177e4SLinus Torvalds if (raw6_proc_init()) 11481da177e4SLinus Torvalds goto proc_raw6_fail; 1149ba4e58ecSGerrit Renker if (udplite6_proc_init()) 1150ba4e58ecSGerrit Renker goto proc_udplite6_fail; 11511da177e4SLinus Torvalds if (ipv6_misc_proc_init()) 11521da177e4SLinus Torvalds goto proc_misc6_fail; 11531da177e4SLinus Torvalds if (if6_proc_init()) 11541da177e4SLinus Torvalds goto proc_if6_fail; 11551da177e4SLinus Torvalds #endif 1156e2fddf5eSDaniel Lezcano err = ip6_route_init(); 1157e2fddf5eSDaniel Lezcano if (err) 1158e2fddf5eSDaniel Lezcano goto ip6_route_fail; 11590a3e78acSDaniel Lezcano err = ip6_flowlabel_init(); 11600a3e78acSDaniel Lezcano if (err) 11610a3e78acSDaniel Lezcano goto ip6_flowlabel_fail; 11621da177e4SLinus Torvalds err = addrconf_init(); 11631da177e4SLinus Torvalds if (err) 11641da177e4SLinus Torvalds goto addrconf_fail; 11651da177e4SLinus Torvalds 11661da177e4SLinus Torvalds /* Init v6 extension headers. */ 1167248b238dSDaniel Lezcano err = ipv6_exthdrs_init(); 1168248b238dSDaniel Lezcano if (err) 1169248b238dSDaniel Lezcano goto ipv6_exthdrs_fail; 1170248b238dSDaniel Lezcano 1171853cbbaaSDaniel Lezcano err = ipv6_frag_init(); 1172853cbbaaSDaniel Lezcano if (err) 1173853cbbaaSDaniel Lezcano goto ipv6_frag_fail; 11741da177e4SLinus Torvalds 11751da177e4SLinus Torvalds /* Init v6 transport protocols. */ 11767f4e4868SDaniel Lezcano err = udpv6_init(); 11777f4e4868SDaniel Lezcano if (err) 11787f4e4868SDaniel Lezcano goto udpv6_fail; 1179e2ed4052SHerbert Xu 11807f4e4868SDaniel Lezcano err = udplitev6_init(); 11817f4e4868SDaniel Lezcano if (err) 11827f4e4868SDaniel Lezcano goto udplitev6_fail; 11837f4e4868SDaniel Lezcano 11847f4e4868SDaniel Lezcano err = tcpv6_init(); 11857f4e4868SDaniel Lezcano if (err) 11867f4e4868SDaniel Lezcano goto tcpv6_fail; 11877f4e4868SDaniel Lezcano 11887f4e4868SDaniel Lezcano err = ipv6_packet_init(); 11897f4e4868SDaniel Lezcano if (err) 11907f4e4868SDaniel Lezcano goto ipv6_packet_fail; 119194911fe3SBenjamin Thery 119294911fe3SBenjamin Thery #ifdef CONFIG_SYSCTL 119394911fe3SBenjamin Thery err = ipv6_sysctl_register(); 119494911fe3SBenjamin Thery if (err) 119594911fe3SBenjamin Thery goto sysctl_fail; 119694911fe3SBenjamin Thery #endif 11971da177e4SLinus Torvalds out: 11981da177e4SLinus Torvalds return err; 11991da177e4SLinus Torvalds 120094911fe3SBenjamin Thery #ifdef CONFIG_SYSCTL 120194911fe3SBenjamin Thery sysctl_fail: 120294911fe3SBenjamin Thery ipv6_packet_cleanup(); 120394911fe3SBenjamin Thery #endif 12047f4e4868SDaniel Lezcano ipv6_packet_fail: 12057f4e4868SDaniel Lezcano tcpv6_exit(); 12067f4e4868SDaniel Lezcano tcpv6_fail: 12077f4e4868SDaniel Lezcano udplitev6_exit(); 12087f4e4868SDaniel Lezcano udplitev6_fail: 12097f4e4868SDaniel Lezcano udpv6_exit(); 12107f4e4868SDaniel Lezcano udpv6_fail: 12117f4e4868SDaniel Lezcano ipv6_frag_exit(); 1212853cbbaaSDaniel Lezcano ipv6_frag_fail: 1213853cbbaaSDaniel Lezcano ipv6_exthdrs_exit(); 1214248b238dSDaniel Lezcano ipv6_exthdrs_fail: 1215248b238dSDaniel Lezcano addrconf_cleanup(); 12161da177e4SLinus Torvalds addrconf_fail: 12171da177e4SLinus Torvalds ip6_flowlabel_cleanup(); 12180a3e78acSDaniel Lezcano ip6_flowlabel_fail: 12191da177e4SLinus Torvalds ip6_route_cleanup(); 1220e2fddf5eSDaniel Lezcano ip6_route_fail: 12211da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 12221da177e4SLinus Torvalds if6_proc_exit(); 12231da177e4SLinus Torvalds proc_if6_fail: 12241da177e4SLinus Torvalds ipv6_misc_proc_exit(); 12251da177e4SLinus Torvalds proc_misc6_fail: 1226ba4e58ecSGerrit Renker udplite6_proc_exit(); 1227ba4e58ecSGerrit Renker proc_udplite6_fail: 12281da177e4SLinus Torvalds raw6_proc_exit(); 12291da177e4SLinus Torvalds proc_raw6_fail: 12301da177e4SLinus Torvalds #endif 12312cc7d573SHarald Welte ipv6_netfilter_fini(); 12322cc7d573SHarald Welte netfilter_fail: 12331da177e4SLinus Torvalds igmp6_cleanup(); 12341da177e4SLinus Torvalds igmp_fail: 12351da177e4SLinus Torvalds ndisc_cleanup(); 12361da177e4SLinus Torvalds ndisc_fail: 1237623d1a1aSWang Chen ip6_mr_cleanup(); 1238623d1a1aSWang Chen ipmr_fail: 12391da177e4SLinus Torvalds icmpv6_cleanup(); 12401da177e4SLinus Torvalds icmp_fail: 124181c1c178SDaniel Lezcano unregister_pernet_subsys(&inet6_net_ops); 124281c1c178SDaniel Lezcano register_pernet_fail: 1243eeb61f71SAl Viro #ifdef CONFIG_SYSCTL 1244eeb61f71SAl Viro ipv6_static_sysctl_unregister(); 1245eeb61f71SAl Viro static_sysctl_fail: 1246eeb61f71SAl Viro #endif 12478eb55910SDavid S. Miller sock_unregister(PF_INET6); 1248e2fddf5eSDaniel Lezcano rtnl_unregister_all(PF_INET6); 12497f4e4868SDaniel Lezcano out_sock_register_fail: 12507f4e4868SDaniel Lezcano rawv6_exit(); 12511da177e4SLinus Torvalds out_unregister_raw_proto: 12521da177e4SLinus Torvalds proto_unregister(&rawv6_prot); 1253ba4e58ecSGerrit Renker out_unregister_udplite_proto: 1254ba4e58ecSGerrit Renker proto_unregister(&udplitev6_prot); 12551da177e4SLinus Torvalds out_unregister_udp_proto: 12561da177e4SLinus Torvalds proto_unregister(&udpv6_prot); 12571da177e4SLinus Torvalds out_unregister_tcp_proto: 12581da177e4SLinus Torvalds proto_unregister(&tcpv6_prot); 12591da177e4SLinus Torvalds goto out; 12601da177e4SLinus Torvalds } 12611da177e4SLinus Torvalds module_init(inet6_init); 12621da177e4SLinus Torvalds 12631da177e4SLinus Torvalds static void __exit inet6_exit(void) 12641da177e4SLinus Torvalds { 126556d417b1SBrian Haley if (disable_ipv6_mod) 1266ff8cf9a9SJohn Dykstra return; 1267ff8cf9a9SJohn Dykstra 12681da177e4SLinus Torvalds /* First of all disallow new sockets creation. */ 12691da177e4SLinus Torvalds sock_unregister(PF_INET6); 1270c127ea2cSThomas Graf /* Disallow any further netlink messages */ 1271c127ea2cSThomas Graf rtnl_unregister_all(PF_INET6); 1272ca17c233SJoe Jin 127394911fe3SBenjamin Thery #ifdef CONFIG_SYSCTL 127494911fe3SBenjamin Thery ipv6_sysctl_unregister(); 127594911fe3SBenjamin Thery #endif 12767f4e4868SDaniel Lezcano udpv6_exit(); 12777f4e4868SDaniel Lezcano udplitev6_exit(); 12787f4e4868SDaniel Lezcano tcpv6_exit(); 12797f4e4868SDaniel Lezcano 1280ca17c233SJoe Jin /* Cleanup code parts. */ 1281ca17c233SJoe Jin ipv6_packet_cleanup(); 1282853cbbaaSDaniel Lezcano ipv6_frag_exit(); 1283248b238dSDaniel Lezcano ipv6_exthdrs_exit(); 12841da177e4SLinus Torvalds addrconf_cleanup(); 1285ca17c233SJoe Jin ip6_flowlabel_cleanup(); 12861da177e4SLinus Torvalds ip6_route_cleanup(); 1287ca17c233SJoe Jin #ifdef CONFIG_PROC_FS 1288ca17c233SJoe Jin 1289ca17c233SJoe Jin /* Cleanup code parts. */ 1290ca17c233SJoe Jin if6_proc_exit(); 1291ca17c233SJoe Jin ipv6_misc_proc_exit(); 1292ca17c233SJoe Jin udplite6_proc_exit(); 1293ca17c233SJoe Jin raw6_proc_exit(); 1294ca17c233SJoe Jin #endif 12952cc7d573SHarald Welte ipv6_netfilter_fini(); 1296ca17c233SJoe Jin igmp6_cleanup(); 12971da177e4SLinus Torvalds ndisc_cleanup(); 1298623d1a1aSWang Chen ip6_mr_cleanup(); 12991da177e4SLinus Torvalds icmpv6_cleanup(); 13007f4e4868SDaniel Lezcano rawv6_exit(); 130194911fe3SBenjamin Thery 130281c1c178SDaniel Lezcano unregister_pernet_subsys(&inet6_net_ops); 1303eeb61f71SAl Viro #ifdef CONFIG_SYSCTL 1304eeb61f71SAl Viro ipv6_static_sysctl_unregister(); 1305eeb61f71SAl Viro #endif 13061da177e4SLinus Torvalds proto_unregister(&rawv6_prot); 1307ca17c233SJoe Jin proto_unregister(&udplitev6_prot); 13081da177e4SLinus Torvalds proto_unregister(&udpv6_prot); 13091da177e4SLinus Torvalds proto_unregister(&tcpv6_prot); 13101f2ccd00SJesper Dangaard Brouer 13111f2ccd00SJesper Dangaard Brouer rcu_barrier(); /* Wait for completion of call_rcu()'s */ 13121da177e4SLinus Torvalds } 13131da177e4SLinus Torvalds module_exit(inet6_exit); 13141da177e4SLinus Torvalds 13151da177e4SLinus Torvalds MODULE_ALIAS_NETPROTO(PF_INET6); 1316