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 21f3213831SJoe Perches #define pr_fmt(fmt) "IPv6: " fmt 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds #include <linux/module.h> 244fc268d2SRandy Dunlap #include <linux/capability.h> 251da177e4SLinus Torvalds #include <linux/errno.h> 261da177e4SLinus Torvalds #include <linux/types.h> 271da177e4SLinus Torvalds #include <linux/socket.h> 281da177e4SLinus Torvalds #include <linux/in.h> 291da177e4SLinus Torvalds #include <linux/kernel.h> 301da177e4SLinus Torvalds #include <linux/timer.h> 311da177e4SLinus Torvalds #include <linux/string.h> 321da177e4SLinus Torvalds #include <linux/sockios.h> 331da177e4SLinus Torvalds #include <linux/net.h> 341da177e4SLinus Torvalds #include <linux/fcntl.h> 351da177e4SLinus Torvalds #include <linux/mm.h> 361da177e4SLinus Torvalds #include <linux/interrupt.h> 371da177e4SLinus Torvalds #include <linux/proc_fs.h> 381da177e4SLinus Torvalds #include <linux/stat.h> 391da177e4SLinus Torvalds #include <linux/init.h> 405a0e3ad6STejun Heo #include <linux/slab.h> 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds #include <linux/inet.h> 431da177e4SLinus Torvalds #include <linux/netdevice.h> 441da177e4SLinus Torvalds #include <linux/icmpv6.h> 452cc7d573SHarald Welte #include <linux/netfilter_ipv6.h> 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds #include <net/ip.h> 481da177e4SLinus Torvalds #include <net/ipv6.h> 491da177e4SLinus Torvalds #include <net/udp.h> 50ba4e58ecSGerrit Renker #include <net/udplite.h> 511da177e4SLinus Torvalds #include <net/tcp.h> 526d0bfe22SLorenzo Colitti #include <net/ping.h> 531da177e4SLinus Torvalds #include <net/protocol.h> 541da177e4SLinus Torvalds #include <net/inet_common.h> 551668e010SKOVACS Krisztian #include <net/route.h> 561da177e4SLinus Torvalds #include <net/transp_v6.h> 571da177e4SLinus Torvalds #include <net/ip6_route.h> 581da177e4SLinus Torvalds #include <net/addrconf.h> 59f564f45cSCong Wang #include <net/ndisc.h> 601da177e4SLinus Torvalds #ifdef CONFIG_IPV6_TUNNEL 611da177e4SLinus Torvalds #include <net/ip6_tunnel.h> 621da177e4SLinus Torvalds #endif 631da177e4SLinus Torvalds 641da177e4SLinus Torvalds #include <asm/uaccess.h> 657bc570c8SYOSHIFUJI Hideaki #include <linux/mroute6.h> 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds MODULE_AUTHOR("Cast of dozens"); 681da177e4SLinus Torvalds MODULE_DESCRIPTION("IPv6 protocol stack for Linux"); 691da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 701da177e4SLinus Torvalds 71f1267347SPavel Emelyanov /* The inetsw6 table contains everything that inet6_create needs to 721da177e4SLinus Torvalds * build a new socket. 731da177e4SLinus Torvalds */ 741da177e4SLinus Torvalds static struct list_head inetsw6[SOCK_MAX]; 751da177e4SLinus Torvalds static DEFINE_SPINLOCK(inetsw6_lock); 761da177e4SLinus Torvalds 7756d417b1SBrian Haley struct ipv6_params ipv6_defaults = { 7856d417b1SBrian Haley .disable_ipv6 = 0, 7956d417b1SBrian Haley .autoconf = 1, 8056d417b1SBrian Haley }; 8156d417b1SBrian Haley 82647c0c70SEldad Zack static int disable_ipv6_mod; 8356d417b1SBrian Haley 8456d417b1SBrian Haley module_param_named(disable, disable_ipv6_mod, int, 0444); 8556d417b1SBrian Haley MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional"); 8656d417b1SBrian Haley 8756d417b1SBrian Haley module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444); 8856d417b1SBrian Haley MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces"); 8956d417b1SBrian Haley 9056d417b1SBrian Haley module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444); 9156d417b1SBrian Haley MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces"); 92fe7ca2e1SBrian Haley 931da177e4SLinus Torvalds static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk) 941da177e4SLinus Torvalds { 951da177e4SLinus Torvalds const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo); 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds return (struct ipv6_pinfo *)(((u8 *)sk) + offset); 981da177e4SLinus Torvalds } 991da177e4SLinus Torvalds 1003f378b68SEric Paris static int inet6_create(struct net *net, struct socket *sock, int protocol, 1013f378b68SEric Paris int kern) 1021da177e4SLinus Torvalds { 1031da177e4SLinus Torvalds struct inet_sock *inet; 1041da177e4SLinus Torvalds struct ipv6_pinfo *np; 1051da177e4SLinus Torvalds struct sock *sk; 1061da177e4SLinus Torvalds struct inet_protosw *answer; 1071da177e4SLinus Torvalds struct proto *answer_prot; 1081da177e4SLinus Torvalds unsigned char answer_flags; 1091da177e4SLinus Torvalds char answer_no_check; 110af1afe86SYOSHIFUJI Hideaki int try_loading_module = 0; 111af1afe86SYOSHIFUJI Hideaki int err; 1121da177e4SLinus Torvalds 1131da177e4SLinus Torvalds /* Look for the requested type/protocol pair. */ 114af1afe86SYOSHIFUJI Hideaki lookup_protocol: 115af1afe86SYOSHIFUJI Hideaki err = -ESOCKTNOSUPPORT; 1161da177e4SLinus Torvalds rcu_read_lock(); 117696adfe8SPaul E. McKenney list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) { 1181da177e4SLinus Torvalds 119696adfe8SPaul E. McKenney err = 0; 1201da177e4SLinus Torvalds /* Check the non-wild match. */ 1211da177e4SLinus Torvalds if (protocol == answer->protocol) { 1221da177e4SLinus Torvalds if (protocol != IPPROTO_IP) 1231da177e4SLinus Torvalds break; 1241da177e4SLinus Torvalds } else { 1251da177e4SLinus Torvalds /* Check for the two wild cases. */ 1261da177e4SLinus Torvalds if (IPPROTO_IP == protocol) { 1271da177e4SLinus Torvalds protocol = answer->protocol; 1281da177e4SLinus Torvalds break; 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds if (IPPROTO_IP == answer->protocol) 1311da177e4SLinus Torvalds break; 1321da177e4SLinus Torvalds } 133af1afe86SYOSHIFUJI Hideaki err = -EPROTONOSUPPORT; 1341da177e4SLinus Torvalds } 1351da177e4SLinus Torvalds 136696adfe8SPaul E. McKenney if (err) { 137af1afe86SYOSHIFUJI Hideaki if (try_loading_module < 2) { 138af1afe86SYOSHIFUJI Hideaki rcu_read_unlock(); 139af1afe86SYOSHIFUJI Hideaki /* 140af1afe86SYOSHIFUJI Hideaki * Be more specific, e.g. net-pf-10-proto-132-type-1 141af1afe86SYOSHIFUJI Hideaki * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM) 142af1afe86SYOSHIFUJI Hideaki */ 143af1afe86SYOSHIFUJI Hideaki if (++try_loading_module == 1) 144af1afe86SYOSHIFUJI Hideaki request_module("net-pf-%d-proto-%d-type-%d", 145af1afe86SYOSHIFUJI Hideaki PF_INET6, protocol, sock->type); 146af1afe86SYOSHIFUJI Hideaki /* 147af1afe86SYOSHIFUJI Hideaki * Fall back to generic, e.g. net-pf-10-proto-132 148af1afe86SYOSHIFUJI Hideaki * (net-pf-PF_INET6-proto-IPPROTO_SCTP) 149af1afe86SYOSHIFUJI Hideaki */ 150af1afe86SYOSHIFUJI Hideaki else 151af1afe86SYOSHIFUJI Hideaki request_module("net-pf-%d-proto-%d", 152af1afe86SYOSHIFUJI Hideaki PF_INET6, protocol); 153af1afe86SYOSHIFUJI Hideaki goto lookup_protocol; 154af1afe86SYOSHIFUJI Hideaki } else 1551da177e4SLinus Torvalds goto out_rcu_unlock; 156af1afe86SYOSHIFUJI Hideaki } 157af1afe86SYOSHIFUJI Hideaki 158af1afe86SYOSHIFUJI Hideaki err = -EPERM; 159af31f412SEric W. Biederman if (sock->type == SOCK_RAW && !kern && 160af31f412SEric W. Biederman !ns_capable(net->user_ns, CAP_NET_RAW)) 1611da177e4SLinus Torvalds goto out_rcu_unlock; 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds sock->ops = answer->ops; 1641da177e4SLinus Torvalds answer_prot = answer->prot; 1651da177e4SLinus Torvalds answer_no_check = answer->no_check; 1661da177e4SLinus Torvalds answer_flags = answer->flags; 1671da177e4SLinus Torvalds rcu_read_unlock(); 1681da177e4SLinus Torvalds 169547b792cSIlpo Järvinen WARN_ON(answer_prot->slab == NULL); 1701da177e4SLinus Torvalds 171af1afe86SYOSHIFUJI Hideaki err = -ENOBUFS; 1726257ff21SPavel Emelyanov sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot); 1731da177e4SLinus Torvalds if (sk == NULL) 1741da177e4SLinus Torvalds goto out; 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds sock_init_data(sock, sk); 1771da177e4SLinus Torvalds 178af1afe86SYOSHIFUJI Hideaki err = 0; 1791da177e4SLinus Torvalds sk->sk_no_check = answer_no_check; 1801da177e4SLinus Torvalds if (INET_PROTOSW_REUSE & answer_flags) 1814a17fd52SPavel Emelyanov sk->sk_reuse = SK_CAN_REUSE; 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds inet = inet_sk(sk); 184469de9b9SPaul Moore inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0; 1851da177e4SLinus Torvalds 1861da177e4SLinus Torvalds if (SOCK_RAW == sock->type) { 187c720c7e8SEric Dumazet inet->inet_num = protocol; 1881da177e4SLinus Torvalds if (IPPROTO_RAW == protocol) 1891da177e4SLinus Torvalds inet->hdrincl = 1; 1901da177e4SLinus Torvalds } 1911da177e4SLinus Torvalds 192e6848976SArnaldo Carvalho de Melo sk->sk_destruct = inet_sock_destruct; 1931da177e4SLinus Torvalds sk->sk_family = PF_INET6; 1941da177e4SLinus Torvalds sk->sk_protocol = protocol; 1951da177e4SLinus Torvalds 1961da177e4SLinus Torvalds sk->sk_backlog_rcv = answer->prot->backlog_rcv; 1971da177e4SLinus Torvalds 1981da177e4SLinus Torvalds inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk); 1991da177e4SLinus Torvalds np->hop_limit = -1; 200f935aa9eSDavid S. Miller np->mcast_hops = IPV6_DEFAULT_MCASTHOPS; 2011da177e4SLinus Torvalds np->mc_loop = 1; 2021da177e4SLinus Torvalds np->pmtudisc = IPV6_PMTUDISC_WANT; 2032e761e05SPavel Emelyanov np->ipv6only = net->ipv6.sysctl.bindv6only; 2041da177e4SLinus Torvalds 2051da177e4SLinus Torvalds /* Init the ipv4 part of the socket since we can have sockets 2061da177e4SLinus Torvalds * using v6 API for ipv4. 2071da177e4SLinus Torvalds */ 2081da177e4SLinus Torvalds inet->uc_ttl = -1; 2091da177e4SLinus Torvalds 2101da177e4SLinus Torvalds inet->mc_loop = 1; 2111da177e4SLinus Torvalds inet->mc_ttl = 1; 2121da177e4SLinus Torvalds inet->mc_index = 0; 2131da177e4SLinus Torvalds inet->mc_list = NULL; 2144c507d28SJiri Benc inet->rcv_tos = 0; 2151da177e4SLinus Torvalds 2161da177e4SLinus Torvalds if (ipv4_config.no_pmtu_disc) 2171da177e4SLinus Torvalds inet->pmtudisc = IP_PMTUDISC_DONT; 2181da177e4SLinus Torvalds else 2191da177e4SLinus Torvalds inet->pmtudisc = IP_PMTUDISC_WANT; 220e6848976SArnaldo Carvalho de Melo /* 221e6848976SArnaldo Carvalho de Melo * Increment only the relevant sk_prot->socks debug field, this changes 222e6848976SArnaldo Carvalho de Melo * the previous behaviour of incrementing both the equivalent to 223e6848976SArnaldo Carvalho de Melo * answer->prot->socks (inet6_sock_nr) and inet_sock_nr. 224e6848976SArnaldo Carvalho de Melo * 225e6848976SArnaldo Carvalho de Melo * This allows better debug granularity as we'll know exactly how many 226e6848976SArnaldo Carvalho de Melo * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6 227e6848976SArnaldo Carvalho de Melo * transport protocol socks. -acme 228e6848976SArnaldo Carvalho de Melo */ 229e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_inc(sk); 2301da177e4SLinus Torvalds 231c720c7e8SEric Dumazet if (inet->inet_num) { 2321da177e4SLinus Torvalds /* It assumes that any protocol which allows 2331da177e4SLinus Torvalds * the user to assign a number at socket 2341da177e4SLinus Torvalds * creation time automatically shares. 2351da177e4SLinus Torvalds */ 236c720c7e8SEric Dumazet inet->inet_sport = htons(inet->inet_num); 2371da177e4SLinus Torvalds sk->sk_prot->hash(sk); 2381da177e4SLinus Torvalds } 2391da177e4SLinus Torvalds if (sk->sk_prot->init) { 240af1afe86SYOSHIFUJI Hideaki err = sk->sk_prot->init(sk); 241af1afe86SYOSHIFUJI Hideaki if (err) { 2421da177e4SLinus Torvalds sk_common_release(sk); 2431da177e4SLinus Torvalds goto out; 2441da177e4SLinus Torvalds } 2451da177e4SLinus Torvalds } 2461da177e4SLinus Torvalds out: 247af1afe86SYOSHIFUJI Hideaki return err; 2481da177e4SLinus Torvalds out_rcu_unlock: 2491da177e4SLinus Torvalds rcu_read_unlock(); 2501da177e4SLinus Torvalds goto out; 2511da177e4SLinus Torvalds } 2521da177e4SLinus Torvalds 2531da177e4SLinus Torvalds 2541da177e4SLinus Torvalds /* bind for INET6 API */ 2551da177e4SLinus Torvalds int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) 2561da177e4SLinus Torvalds { 2571da177e4SLinus Torvalds struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr; 2581da177e4SLinus Torvalds struct sock *sk = sock->sk; 2591da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 2601da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 2613b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(sk); 262fd683222SAl Viro __be32 v4addr = 0; 2631da177e4SLinus Torvalds unsigned short snum; 2641da177e4SLinus Torvalds int addr_type = 0; 2651da177e4SLinus Torvalds int err = 0; 2661da177e4SLinus Torvalds 2671da177e4SLinus Torvalds /* If the socket has its own bind function then use it. */ 2681da177e4SLinus Torvalds if (sk->sk_prot->bind) 2691da177e4SLinus Torvalds return sk->sk_prot->bind(sk, uaddr, addr_len); 2701da177e4SLinus Torvalds 2711da177e4SLinus Torvalds if (addr_len < SIN6_LEN_RFC2133) 2721da177e4SLinus Torvalds return -EINVAL; 2735a079c30SMarcus Meissner 2745a079c30SMarcus Meissner if (addr->sin6_family != AF_INET6) 275c349a528SMarcus Meissner return -EAFNOSUPPORT; 2765a079c30SMarcus Meissner 2771da177e4SLinus Torvalds addr_type = ipv6_addr_type(&addr->sin6_addr); 2781da177e4SLinus Torvalds if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM) 2791da177e4SLinus Torvalds return -EINVAL; 2801da177e4SLinus Torvalds 2811da177e4SLinus Torvalds snum = ntohs(addr->sin6_port); 2823594698aSEric W. Biederman if (snum && snum < PROT_SOCK && !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) 2831da177e4SLinus Torvalds return -EACCES; 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds lock_sock(sk); 2861da177e4SLinus Torvalds 2871da177e4SLinus Torvalds /* Check these errors (active socket, double bind). */ 288c720c7e8SEric Dumazet if (sk->sk_state != TCP_CLOSE || inet->inet_num) { 2891da177e4SLinus Torvalds err = -EINVAL; 2901da177e4SLinus Torvalds goto out; 2911da177e4SLinus Torvalds } 2921da177e4SLinus Torvalds 2931da177e4SLinus Torvalds /* Check if the address belongs to the host. */ 2941da177e4SLinus Torvalds if (addr_type == IPV6_ADDR_MAPPED) { 29563d9950bSVlad Yasevich int chk_addr_ret; 29663d9950bSVlad Yasevich 297783ed5a7SVlad Yasevich /* Binding to v4-mapped address on a v6-only socket 298783ed5a7SVlad Yasevich * makes no sense 299783ed5a7SVlad Yasevich */ 300783ed5a7SVlad Yasevich if (np->ipv6only) { 301783ed5a7SVlad Yasevich err = -EINVAL; 302783ed5a7SVlad Yasevich goto out; 303783ed5a7SVlad Yasevich } 30463d9950bSVlad Yasevich 305a34f0b31SUwe Kleine-König /* Reproduce AF_INET checks to make the bindings consistent */ 3061da177e4SLinus Torvalds v4addr = addr->sin6_addr.s6_addr32[3]; 30763d9950bSVlad Yasevich chk_addr_ret = inet_addr_type(net, v4addr); 30863d9950bSVlad Yasevich if (!sysctl_ip_nonlocal_bind && 30963d9950bSVlad Yasevich !(inet->freebind || inet->transparent) && 31063d9950bSVlad Yasevich v4addr != htonl(INADDR_ANY) && 31163d9950bSVlad Yasevich chk_addr_ret != RTN_LOCAL && 31263d9950bSVlad Yasevich chk_addr_ret != RTN_MULTICAST && 313ca6982b8SBruno Prémont chk_addr_ret != RTN_BROADCAST) { 314ca6982b8SBruno Prémont err = -EADDRNOTAVAIL; 3151da177e4SLinus Torvalds goto out; 316ca6982b8SBruno Prémont } 3171da177e4SLinus Torvalds } else { 3181da177e4SLinus Torvalds if (addr_type != IPV6_ADDR_ANY) { 3191da177e4SLinus Torvalds struct net_device *dev = NULL; 3201da177e4SLinus Torvalds 32116ba5e8eSEric Dumazet rcu_read_lock(); 322842df073SHannes Frederic Sowa if (__ipv6_addr_needs_scope_id(addr_type)) { 3231da177e4SLinus Torvalds if (addr_len >= sizeof(struct sockaddr_in6) && 3241da177e4SLinus Torvalds addr->sin6_scope_id) { 3251da177e4SLinus Torvalds /* Override any existing binding, if another one 3261da177e4SLinus Torvalds * is supplied by user. 3271da177e4SLinus Torvalds */ 3281da177e4SLinus Torvalds sk->sk_bound_dev_if = addr->sin6_scope_id; 3291da177e4SLinus Torvalds } 3301da177e4SLinus Torvalds 3311da177e4SLinus Torvalds /* Binding to link-local address requires an interface */ 3321da177e4SLinus Torvalds if (!sk->sk_bound_dev_if) { 3331da177e4SLinus Torvalds err = -EINVAL; 33416ba5e8eSEric Dumazet goto out_unlock; 3351da177e4SLinus Torvalds } 33616ba5e8eSEric Dumazet dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if); 3371da177e4SLinus Torvalds if (!dev) { 3381da177e4SLinus Torvalds err = -ENODEV; 33916ba5e8eSEric Dumazet goto out_unlock; 3401da177e4SLinus Torvalds } 3411da177e4SLinus Torvalds } 3421da177e4SLinus Torvalds 3431da177e4SLinus Torvalds /* ipv4 addr of the socket is invalid. Only the 3441da177e4SLinus Torvalds * unspecified and mapped address have a v4 equivalent. 3451da177e4SLinus Torvalds */ 3461da177e4SLinus Torvalds v4addr = LOOPBACK4_IPV6; 3471da177e4SLinus Torvalds if (!(addr_type & IPV6_ADDR_MULTICAST)) { 348f74024d9SMaciej Żenczykowski if (!(inet->freebind || inet->transparent) && 3490a513f6aSBalazs Scheidler !ipv6_chk_addr(net, &addr->sin6_addr, 350bfeade08SDaniel Lezcano dev, 0)) { 3511da177e4SLinus Torvalds err = -EADDRNOTAVAIL; 35216ba5e8eSEric Dumazet goto out_unlock; 3531da177e4SLinus Torvalds } 3541da177e4SLinus Torvalds } 35516ba5e8eSEric Dumazet rcu_read_unlock(); 3561da177e4SLinus Torvalds } 3571da177e4SLinus Torvalds } 3581da177e4SLinus Torvalds 359c720c7e8SEric Dumazet inet->inet_rcv_saddr = v4addr; 360c720c7e8SEric Dumazet inet->inet_saddr = v4addr; 3611da177e4SLinus Torvalds 362efe4208fSEric Dumazet sk->sk_v6_rcv_saddr = addr->sin6_addr; 3631da177e4SLinus Torvalds 3641da177e4SLinus Torvalds if (!(addr_type & IPV6_ADDR_MULTICAST)) 3654e3fd7a0SAlexey Dobriyan np->saddr = addr->sin6_addr; 3661da177e4SLinus Torvalds 3671da177e4SLinus Torvalds /* Make sure we are allowed to bind here. */ 3681da177e4SLinus Torvalds if (sk->sk_prot->get_port(sk, snum)) { 3691da177e4SLinus Torvalds inet_reset_saddr(sk); 3701da177e4SLinus Torvalds err = -EADDRINUSE; 3711da177e4SLinus Torvalds goto out; 3721da177e4SLinus Torvalds } 3731da177e4SLinus Torvalds 3740f8d3c7aSVlad Yasevich if (addr_type != IPV6_ADDR_ANY) { 3751da177e4SLinus Torvalds sk->sk_userlocks |= SOCK_BINDADDR_LOCK; 3760f8d3c7aSVlad Yasevich if (addr_type != IPV6_ADDR_MAPPED) 3770f8d3c7aSVlad Yasevich np->ipv6only = 1; 3780f8d3c7aSVlad Yasevich } 3791da177e4SLinus Torvalds if (snum) 3801da177e4SLinus Torvalds sk->sk_userlocks |= SOCK_BINDPORT_LOCK; 381c720c7e8SEric Dumazet inet->inet_sport = htons(inet->inet_num); 382c720c7e8SEric Dumazet inet->inet_dport = 0; 383c720c7e8SEric Dumazet inet->inet_daddr = 0; 3841da177e4SLinus Torvalds out: 3851da177e4SLinus Torvalds release_sock(sk); 3861da177e4SLinus Torvalds return err; 38716ba5e8eSEric Dumazet out_unlock: 38816ba5e8eSEric Dumazet rcu_read_unlock(); 38916ba5e8eSEric Dumazet goto out; 3901da177e4SLinus Torvalds } 3917159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(inet6_bind); 3927159039aSYOSHIFUJI Hideaki 3931da177e4SLinus Torvalds int inet6_release(struct socket *sock) 3941da177e4SLinus Torvalds { 3951da177e4SLinus Torvalds struct sock *sk = sock->sk; 3961da177e4SLinus Torvalds 3971da177e4SLinus Torvalds if (sk == NULL) 3981da177e4SLinus Torvalds return -EINVAL; 3991da177e4SLinus Torvalds 4001da177e4SLinus Torvalds /* Free mc lists */ 4011da177e4SLinus Torvalds ipv6_sock_mc_close(sk); 4021da177e4SLinus Torvalds 4031da177e4SLinus Torvalds /* Free ac lists */ 4041da177e4SLinus Torvalds ipv6_sock_ac_close(sk); 4051da177e4SLinus Torvalds 4061da177e4SLinus Torvalds return inet_release(sock); 4071da177e4SLinus Torvalds } 4087159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(inet6_release); 4097159039aSYOSHIFUJI Hideaki 4107d06b2e0SBrian Haley void inet6_destroy_sock(struct sock *sk) 4111da177e4SLinus Torvalds { 4121da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 4131da177e4SLinus Torvalds struct sk_buff *skb; 4141da177e4SLinus Torvalds struct ipv6_txoptions *opt; 4151da177e4SLinus Torvalds 4161da177e4SLinus Torvalds /* Release rx options */ 4171da177e4SLinus Torvalds 418647c0c70SEldad Zack skb = xchg(&np->pktoptions, NULL); 419647c0c70SEldad Zack if (skb != NULL) 4201da177e4SLinus Torvalds kfree_skb(skb); 4211da177e4SLinus Torvalds 422647c0c70SEldad Zack skb = xchg(&np->rxpmtu, NULL); 423647c0c70SEldad Zack if (skb != NULL) 4244b340ae2SBrian Haley kfree_skb(skb); 4254b340ae2SBrian Haley 4261da177e4SLinus Torvalds /* Free flowlabels */ 4271da177e4SLinus Torvalds fl6_free_socklist(sk); 4281da177e4SLinus Torvalds 4291da177e4SLinus Torvalds /* Free tx options */ 4301da177e4SLinus Torvalds 431647c0c70SEldad Zack opt = xchg(&np->opt, NULL); 432647c0c70SEldad Zack if (opt != NULL) 4331da177e4SLinus Torvalds sock_kfree_s(sk, opt, opt->tot_len); 4341da177e4SLinus Torvalds } 4353cf3dc6cSArnaldo Carvalho de Melo EXPORT_SYMBOL_GPL(inet6_destroy_sock); 4363cf3dc6cSArnaldo Carvalho de Melo 4371da177e4SLinus Torvalds /* 4381da177e4SLinus Torvalds * This does both peername and sockname. 4391da177e4SLinus Torvalds */ 4401da177e4SLinus Torvalds 4411da177e4SLinus Torvalds int inet6_getname(struct socket *sock, struct sockaddr *uaddr, 4421da177e4SLinus Torvalds int *uaddr_len, int peer) 4431da177e4SLinus Torvalds { 4441da177e4SLinus Torvalds struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr; 4451da177e4SLinus Torvalds struct sock *sk = sock->sk; 4461da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 4471da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 4481da177e4SLinus Torvalds 4491da177e4SLinus Torvalds sin->sin6_family = AF_INET6; 4501da177e4SLinus Torvalds sin->sin6_flowinfo = 0; 4511da177e4SLinus Torvalds sin->sin6_scope_id = 0; 4521da177e4SLinus Torvalds if (peer) { 453c720c7e8SEric Dumazet if (!inet->inet_dport) 4541da177e4SLinus Torvalds return -ENOTCONN; 4551da177e4SLinus Torvalds if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && 4561da177e4SLinus Torvalds peer == 1) 4571da177e4SLinus Torvalds return -ENOTCONN; 458c720c7e8SEric Dumazet sin->sin6_port = inet->inet_dport; 459efe4208fSEric Dumazet sin->sin6_addr = sk->sk_v6_daddr; 4601da177e4SLinus Torvalds if (np->sndflow) 4611da177e4SLinus Torvalds sin->sin6_flowinfo = np->flow_label; 4621da177e4SLinus Torvalds } else { 463efe4208fSEric Dumazet if (ipv6_addr_any(&sk->sk_v6_rcv_saddr)) 4644e3fd7a0SAlexey Dobriyan sin->sin6_addr = np->saddr; 4651da177e4SLinus Torvalds else 466efe4208fSEric Dumazet sin->sin6_addr = sk->sk_v6_rcv_saddr; 4671da177e4SLinus Torvalds 468c720c7e8SEric Dumazet sin->sin6_port = inet->inet_sport; 4691da177e4SLinus Torvalds } 470842df073SHannes Frederic Sowa sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr, 471842df073SHannes Frederic Sowa sk->sk_bound_dev_if); 4721da177e4SLinus Torvalds *uaddr_len = sizeof(*sin); 473a02cec21SEric Dumazet return 0; 4741da177e4SLinus Torvalds } 4757159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(inet6_getname); 4767159039aSYOSHIFUJI Hideaki 4771da177e4SLinus Torvalds int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 4781da177e4SLinus Torvalds { 4791da177e4SLinus Torvalds struct sock *sk = sock->sk; 4803b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(sk); 4811da177e4SLinus Torvalds 482647c0c70SEldad Zack switch (cmd) { 4831da177e4SLinus Torvalds case SIOCGSTAMP: 4841da177e4SLinus Torvalds return sock_get_timestamp(sk, (struct timeval __user *)arg); 4851da177e4SLinus Torvalds 486ae40eb1eSEric Dumazet case SIOCGSTAMPNS: 487ae40eb1eSEric Dumazet return sock_get_timestampns(sk, (struct timespec __user *)arg); 488ae40eb1eSEric Dumazet 4891da177e4SLinus Torvalds case SIOCADDRT: 4901da177e4SLinus Torvalds case SIOCDELRT: 4911da177e4SLinus Torvalds 492a02cec21SEric Dumazet return ipv6_route_ioctl(net, cmd, (void __user *)arg); 4931da177e4SLinus Torvalds 4941da177e4SLinus Torvalds case SIOCSIFADDR: 495af284937SDaniel Lezcano return addrconf_add_ifaddr(net, (void __user *) arg); 4961da177e4SLinus Torvalds case SIOCDIFADDR: 497af284937SDaniel Lezcano return addrconf_del_ifaddr(net, (void __user *) arg); 4981da177e4SLinus Torvalds case SIOCSIFDSTADDR: 499af284937SDaniel Lezcano return addrconf_set_dstaddr(net, (void __user *) arg); 5001da177e4SLinus Torvalds default: 501b5e5fa5eSChristoph Hellwig if (!sk->sk_prot->ioctl) 502b5e5fa5eSChristoph Hellwig return -ENOIOCTLCMD; 503b5e5fa5eSChristoph Hellwig return sk->sk_prot->ioctl(sk, cmd, arg); 5041da177e4SLinus Torvalds } 5051da177e4SLinus Torvalds /*NOTREACHED*/ 506a02cec21SEric Dumazet return 0; 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: 613f3213831SJoe Perches pr_err("Attempt to override permanent protocol %d\n", protocol); 6141da177e4SLinus Torvalds goto out; 6151da177e4SLinus Torvalds 6161da177e4SLinus Torvalds out_illegal: 617f3213831SJoe Perches pr_err("Ignoring attempt to register invalid socket type %d\n", 6181da177e4SLinus Torvalds p->type); 6191da177e4SLinus Torvalds goto out; 6201da177e4SLinus Torvalds } 6217159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(inet6_register_protosw); 6227159039aSYOSHIFUJI Hideaki 6231da177e4SLinus Torvalds void 6241da177e4SLinus Torvalds inet6_unregister_protosw(struct inet_protosw *p) 6251da177e4SLinus Torvalds { 6261da177e4SLinus Torvalds if (INET_PROTOSW_PERMANENT & p->flags) { 627f3213831SJoe Perches pr_err("Attempt to unregister permanent protocol %d\n", 6281da177e4SLinus Torvalds p->protocol); 6291da177e4SLinus Torvalds } else { 6301da177e4SLinus Torvalds spin_lock_bh(&inetsw6_lock); 6311da177e4SLinus Torvalds list_del_rcu(&p->list); 6321da177e4SLinus Torvalds spin_unlock_bh(&inetsw6_lock); 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds synchronize_net(); 6351da177e4SLinus Torvalds } 6361da177e4SLinus Torvalds } 6377159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(inet6_unregister_protosw); 6387159039aSYOSHIFUJI Hideaki 639b9750ce1SArnaldo Carvalho de Melo int inet6_sk_rebuild_header(struct sock *sk) 640b9750ce1SArnaldo Carvalho de Melo { 641b9750ce1SArnaldo Carvalho de Melo struct ipv6_pinfo *np = inet6_sk(sk); 64268d0c6d3SDavid S. Miller struct dst_entry *dst; 643b9750ce1SArnaldo Carvalho de Melo 644b9750ce1SArnaldo Carvalho de Melo dst = __sk_dst_check(sk, np->dst_cookie); 645b9750ce1SArnaldo Carvalho de Melo 646b9750ce1SArnaldo Carvalho de Melo if (dst == NULL) { 647b9750ce1SArnaldo Carvalho de Melo struct inet_sock *inet = inet_sk(sk); 64820c59de2SArnaud Ebalard struct in6_addr *final_p, final; 6494c9483b2SDavid S. Miller struct flowi6 fl6; 650b9750ce1SArnaldo Carvalho de Melo 6514c9483b2SDavid S. Miller memset(&fl6, 0, sizeof(fl6)); 6524c9483b2SDavid S. Miller fl6.flowi6_proto = sk->sk_protocol; 653efe4208fSEric Dumazet fl6.daddr = sk->sk_v6_daddr; 6544e3fd7a0SAlexey Dobriyan fl6.saddr = np->saddr; 6554c9483b2SDavid S. Miller fl6.flowlabel = np->flow_label; 6564c9483b2SDavid S. Miller fl6.flowi6_oif = sk->sk_bound_dev_if; 6574c9483b2SDavid S. Miller fl6.flowi6_mark = sk->sk_mark; 6581958b856SDavid S. Miller fl6.fl6_dport = inet->inet_dport; 6591958b856SDavid S. Miller fl6.fl6_sport = inet->inet_sport; 6604c9483b2SDavid S. Miller security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); 661b9750ce1SArnaldo Carvalho de Melo 6624c9483b2SDavid S. Miller final_p = fl6_update_dst(&fl6, np->opt, &final); 663b9750ce1SArnaldo Carvalho de Melo 6644c9483b2SDavid S. Miller dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false); 66568d0c6d3SDavid S. Miller if (IS_ERR(dst)) { 666b9750ce1SArnaldo Carvalho de Melo sk->sk_route_caps = 0; 66768d0c6d3SDavid S. Miller sk->sk_err_soft = -PTR_ERR(dst); 66868d0c6d3SDavid S. Miller return PTR_ERR(dst); 669b9750ce1SArnaldo Carvalho de Melo } 670b9750ce1SArnaldo Carvalho de Melo 6718e1ef0a9SYOSHIFUJI Hideaki __ip6_dst_store(sk, dst, NULL, NULL); 672b9750ce1SArnaldo Carvalho de Melo } 673b9750ce1SArnaldo Carvalho de Melo 674b9750ce1SArnaldo Carvalho de Melo return 0; 675b9750ce1SArnaldo Carvalho de Melo } 676b9750ce1SArnaldo Carvalho de Melo EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header); 677b9750ce1SArnaldo Carvalho de Melo 67892113bfdSEric Dumazet bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb) 679399c07deSArnaldo Carvalho de Melo { 68092113bfdSEric Dumazet const struct ipv6_pinfo *np = inet6_sk(sk); 68192113bfdSEric Dumazet const struct inet6_skb_parm *opt = IP6CB(skb); 682399c07deSArnaldo Carvalho de Melo 683399c07deSArnaldo Carvalho de Melo if (np->rxopt.all) { 684399c07deSArnaldo Carvalho de Melo if ((opt->hop && (np->rxopt.bits.hopopts || 685399c07deSArnaldo Carvalho de Melo np->rxopt.bits.ohopopts)) || 686d56f90a7SArnaldo Carvalho de Melo ((IPV6_FLOWINFO_MASK & 687d56f90a7SArnaldo Carvalho de Melo *(__be32 *)skb_network_header(skb)) && 688399c07deSArnaldo Carvalho de Melo np->rxopt.bits.rxflow) || 689399c07deSArnaldo Carvalho de Melo (opt->srcrt && (np->rxopt.bits.srcrt || 690399c07deSArnaldo Carvalho de Melo np->rxopt.bits.osrcrt)) || 691399c07deSArnaldo Carvalho de Melo ((opt->dst1 || opt->dst0) && 692399c07deSArnaldo Carvalho de Melo (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts))) 69392113bfdSEric Dumazet return true; 694399c07deSArnaldo Carvalho de Melo } 69592113bfdSEric Dumazet return false; 696399c07deSArnaldo Carvalho de Melo } 697399c07deSArnaldo Carvalho de Melo EXPORT_SYMBOL_GPL(ipv6_opt_accepted); 698399c07deSArnaldo Carvalho de Melo 6997546dd97SStephen Hemminger static struct packet_type ipv6_packet_type __read_mostly = { 70009640e63SHarvey Harrison .type = cpu_to_be16(ETH_P_IPV6), 701662397fdSYOSHIFUJI Hideaki .func = ipv6_rcv, 70222061d80SVlad Yasevich }; 70322061d80SVlad Yasevich 704662397fdSYOSHIFUJI Hideaki static int __init ipv6_packet_init(void) 705662397fdSYOSHIFUJI Hideaki { 706662397fdSYOSHIFUJI Hideaki dev_add_pack(&ipv6_packet_type); 707662397fdSYOSHIFUJI Hideaki return 0; 708662397fdSYOSHIFUJI Hideaki } 709662397fdSYOSHIFUJI Hideaki 710662397fdSYOSHIFUJI Hideaki static void ipv6_packet_cleanup(void) 711662397fdSYOSHIFUJI Hideaki { 712662397fdSYOSHIFUJI Hideaki dev_remove_pack(&ipv6_packet_type); 713662397fdSYOSHIFUJI Hideaki } 714662397fdSYOSHIFUJI Hideaki 715e43291cbSDenis V. Lunev static int __net_init ipv6_init_mibs(struct net *net) 716e43291cbSDenis V. Lunev { 7177d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.udp_stats_in6, 7181823e4c8SEric Dumazet sizeof(struct udp_mib), 7191823e4c8SEric Dumazet __alignof__(struct udp_mib)) < 0) 7200c7ed677SDenis V. Lunev return -ENOMEM; 7217d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.udplite_stats_in6, 7221823e4c8SEric Dumazet sizeof(struct udp_mib), 7231823e4c8SEric Dumazet __alignof__(struct udp_mib)) < 0) 724be713a44SDenis V. Lunev goto err_udplite_mib; 7257d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.ipv6_statistics, 7261823e4c8SEric Dumazet sizeof(struct ipstats_mib), 7271823e4c8SEric Dumazet __alignof__(struct ipstats_mib)) < 0) 7289261e537SDenis V. Lunev goto err_ip_mib; 7297d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.icmpv6_statistics, 7301823e4c8SEric Dumazet sizeof(struct icmpv6_mib), 7311823e4c8SEric Dumazet __alignof__(struct icmpv6_mib)) < 0) 7329261e537SDenis V. Lunev goto err_icmp_mib; 7332a24444fSEric Dumazet net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib), 7342a24444fSEric Dumazet GFP_KERNEL); 7352a24444fSEric Dumazet if (!net->mib.icmpv6msg_statistics) 7369261e537SDenis V. Lunev goto err_icmpmsg_mib; 737e43291cbSDenis V. Lunev return 0; 738be713a44SDenis V. Lunev 7399261e537SDenis V. Lunev err_icmpmsg_mib: 7407d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics); 7419261e537SDenis V. Lunev err_icmp_mib: 7427d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.ipv6_statistics); 7439261e537SDenis V. Lunev err_ip_mib: 7447d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6); 745be713a44SDenis V. Lunev err_udplite_mib: 7467d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.udp_stats_in6); 747be713a44SDenis V. Lunev return -ENOMEM; 748e43291cbSDenis V. Lunev } 749e43291cbSDenis V. Lunev 7502c8c1e72SAlexey Dobriyan static void ipv6_cleanup_mibs(struct net *net) 751e43291cbSDenis V. Lunev { 7527d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.udp_stats_in6); 7537d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6); 7547d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.ipv6_statistics); 7557d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics); 7562a24444fSEric Dumazet kfree(net->mib.icmpv6msg_statistics); 757e43291cbSDenis V. Lunev } 758e43291cbSDenis V. Lunev 759e7dc8494SAlexey Dobriyan static int __net_init inet6_net_init(struct net *net) 76081c1c178SDaniel Lezcano { 7610c96d8c5SDaniel Lezcano int err = 0; 7620c96d8c5SDaniel Lezcano 76399bc9c4eSDaniel Lezcano net->ipv6.sysctl.bindv6only = 0; 76441a76906SDaniel Lezcano net->ipv6.sysctl.icmpv6_time = 1*HZ; 765ca4c3fc2Sfan.du atomic_set(&net->ipv6.rt_genid, 0); 766e71e0349SDaniel Lezcano 767e43291cbSDenis V. Lunev err = ipv6_init_mibs(net); 768e43291cbSDenis V. Lunev if (err) 769e43291cbSDenis V. Lunev return err; 7700c96d8c5SDaniel Lezcano #ifdef CONFIG_PROC_FS 7710c96d8c5SDaniel Lezcano err = udp6_proc_init(net); 7720c96d8c5SDaniel Lezcano if (err) 7730c96d8c5SDaniel Lezcano goto out; 7746f8b13bcSDaniel Lezcano err = tcp6_proc_init(net); 7756f8b13bcSDaniel Lezcano if (err) 7766f8b13bcSDaniel Lezcano goto proc_tcp6_fail; 7776ab57e7eSDaniel Lezcano err = ac6_proc_init(net); 7786ab57e7eSDaniel Lezcano if (err) 7796ab57e7eSDaniel Lezcano goto proc_ac6_fail; 7800c96d8c5SDaniel Lezcano #endif 7810c96d8c5SDaniel Lezcano return err; 7826f8b13bcSDaniel Lezcano 7836f8b13bcSDaniel Lezcano #ifdef CONFIG_PROC_FS 7846ab57e7eSDaniel Lezcano proc_ac6_fail: 7856ab57e7eSDaniel Lezcano tcp6_proc_exit(net); 7866f8b13bcSDaniel Lezcano proc_tcp6_fail: 7876f8b13bcSDaniel Lezcano udp6_proc_exit(net); 788e43291cbSDenis V. Lunev out: 789e43291cbSDenis V. Lunev ipv6_cleanup_mibs(net); 790e43291cbSDenis V. Lunev return err; 7916f8b13bcSDaniel Lezcano #endif 79281c1c178SDaniel Lezcano } 79381c1c178SDaniel Lezcano 7942c8c1e72SAlexey Dobriyan static void __net_exit inet6_net_exit(struct net *net) 79581c1c178SDaniel Lezcano { 7960c96d8c5SDaniel Lezcano #ifdef CONFIG_PROC_FS 7970c96d8c5SDaniel Lezcano udp6_proc_exit(net); 7986f8b13bcSDaniel Lezcano tcp6_proc_exit(net); 7996ab57e7eSDaniel Lezcano ac6_proc_exit(net); 8000c96d8c5SDaniel Lezcano #endif 801e43291cbSDenis V. Lunev ipv6_cleanup_mibs(net); 80281c1c178SDaniel Lezcano } 80381c1c178SDaniel Lezcano 80481c1c178SDaniel Lezcano static struct pernet_operations inet6_net_ops = { 80581c1c178SDaniel Lezcano .init = inet6_net_init, 80681c1c178SDaniel Lezcano .exit = inet6_net_exit, 80781c1c178SDaniel Lezcano }; 80881c1c178SDaniel Lezcano 8095f81bd2eSCong Wang static const struct ipv6_stub ipv6_stub_impl = { 8105f81bd2eSCong Wang .ipv6_sock_mc_join = ipv6_sock_mc_join, 8115f81bd2eSCong Wang .ipv6_sock_mc_drop = ipv6_sock_mc_drop, 8125f81bd2eSCong Wang .ipv6_dst_lookup = ip6_dst_lookup, 8135f81bd2eSCong Wang .udpv6_encap_enable = udpv6_encap_enable, 814f564f45cSCong Wang .ndisc_send_na = ndisc_send_na, 815e15a00aaSCong Wang .nd_tbl = &nd_tbl, 8165f81bd2eSCong Wang }; 8175f81bd2eSCong Wang 8181da177e4SLinus Torvalds static int __init inet6_init(void) 8191da177e4SLinus Torvalds { 8201da177e4SLinus Torvalds struct list_head *r; 821fe7ca2e1SBrian Haley int err = 0; 8221da177e4SLinus Torvalds 823ba96bcbcSYOSHIFUJI Hideaki / 吉藤英明 BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > FIELD_SIZEOF(struct sk_buff, cb)); 824ef047f5eSYOSHIFUJI Hideaki 825fe7ca2e1SBrian Haley /* Register the socket-side information for inet6_create. */ 826fe7ca2e1SBrian Haley for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) 827fe7ca2e1SBrian Haley INIT_LIST_HEAD(r); 828fe7ca2e1SBrian Haley 82956d417b1SBrian Haley if (disable_ipv6_mod) { 830f3213831SJoe Perches pr_info("Loaded, but administratively disabled, reboot required to enable\n"); 831fe7ca2e1SBrian Haley goto out; 832fe7ca2e1SBrian Haley } 833fe7ca2e1SBrian Haley 8341da177e4SLinus Torvalds err = proto_register(&tcpv6_prot, 1); 8351da177e4SLinus Torvalds if (err) 8361da177e4SLinus Torvalds goto out; 8371da177e4SLinus Torvalds 8381da177e4SLinus Torvalds err = proto_register(&udpv6_prot, 1); 8391da177e4SLinus Torvalds if (err) 8401da177e4SLinus Torvalds goto out_unregister_tcp_proto; 8411da177e4SLinus Torvalds 842ba4e58ecSGerrit Renker err = proto_register(&udplitev6_prot, 1); 8431da177e4SLinus Torvalds if (err) 8441da177e4SLinus Torvalds goto out_unregister_udp_proto; 8451da177e4SLinus Torvalds 846ba4e58ecSGerrit Renker err = proto_register(&rawv6_prot, 1); 847ba4e58ecSGerrit Renker if (err) 848ba4e58ecSGerrit Renker goto out_unregister_udplite_proto; 849ba4e58ecSGerrit Renker 8506d0bfe22SLorenzo Colitti err = proto_register(&pingv6_prot, 1); 8516d0bfe22SLorenzo Colitti if (err) 8526d0bfe22SLorenzo Colitti goto out_unregister_ping_proto; 8531da177e4SLinus Torvalds 8541da177e4SLinus Torvalds /* We MUST register RAW sockets before we create the ICMP6, 8551da177e4SLinus Torvalds * IGMP6, or NDISC control sockets. 8561da177e4SLinus Torvalds */ 8577f4e4868SDaniel Lezcano err = rawv6_init(); 8587f4e4868SDaniel Lezcano if (err) 8597f4e4868SDaniel Lezcano goto out_unregister_raw_proto; 8601da177e4SLinus Torvalds 8611da177e4SLinus Torvalds /* Register the family here so that the init calls below will 8621da177e4SLinus Torvalds * be able to create sockets. (?? is this dangerous ??) 8631da177e4SLinus Torvalds */ 8648eb55910SDavid S. Miller err = sock_register(&inet6_family_ops); 8658eb55910SDavid S. Miller if (err) 8667f4e4868SDaniel Lezcano goto out_sock_register_fail; 8671da177e4SLinus Torvalds 8681da177e4SLinus Torvalds /* 8691da177e4SLinus Torvalds * ipngwg API draft makes clear that the correct semantics 8701da177e4SLinus Torvalds * for TCP and UDP is to consider one TCP and UDP instance 87125985edcSLucas De Marchi * in a host available by both INET and INET6 APIs and 8721da177e4SLinus Torvalds * able to communicate via both network protocols. 8731da177e4SLinus Torvalds */ 8741da177e4SLinus Torvalds 87581c1c178SDaniel Lezcano err = register_pernet_subsys(&inet6_net_ops); 87681c1c178SDaniel Lezcano if (err) 87781c1c178SDaniel Lezcano goto register_pernet_fail; 8789b0f976fSDenis V. Lunev err = icmpv6_init(); 8791da177e4SLinus Torvalds if (err) 8801da177e4SLinus Torvalds goto icmp_fail; 881623d1a1aSWang Chen err = ip6_mr_init(); 882623d1a1aSWang Chen if (err) 883623d1a1aSWang Chen goto ipmr_fail; 8849b0f976fSDenis V. Lunev err = ndisc_init(); 8851da177e4SLinus Torvalds if (err) 8861da177e4SLinus Torvalds goto ndisc_fail; 8879b0f976fSDenis V. Lunev err = igmp6_init(); 8881da177e4SLinus Torvalds if (err) 8891da177e4SLinus Torvalds goto igmp_fail; 8905f81bd2eSCong Wang 8915f81bd2eSCong Wang ipv6_stub = &ipv6_stub_impl; 8925f81bd2eSCong Wang 8932cc7d573SHarald Welte err = ipv6_netfilter_init(); 8942cc7d573SHarald Welte if (err) 8952cc7d573SHarald Welte goto netfilter_fail; 8961da177e4SLinus Torvalds /* Create /proc/foo6 entries. */ 8971da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 8981da177e4SLinus Torvalds err = -ENOMEM; 8991da177e4SLinus Torvalds if (raw6_proc_init()) 9001da177e4SLinus Torvalds goto proc_raw6_fail; 901ba4e58ecSGerrit Renker if (udplite6_proc_init()) 902ba4e58ecSGerrit Renker goto proc_udplite6_fail; 9031da177e4SLinus Torvalds if (ipv6_misc_proc_init()) 9041da177e4SLinus Torvalds goto proc_misc6_fail; 9051da177e4SLinus Torvalds if (if6_proc_init()) 9061da177e4SLinus Torvalds goto proc_if6_fail; 9071da177e4SLinus Torvalds #endif 908e2fddf5eSDaniel Lezcano err = ip6_route_init(); 909e2fddf5eSDaniel Lezcano if (err) 910e2fddf5eSDaniel Lezcano goto ip6_route_fail; 9112c861cc6SMichal Kubeček err = ndisc_late_init(); 9122c861cc6SMichal Kubeček if (err) 9132c861cc6SMichal Kubeček goto ndisc_late_fail; 9140a3e78acSDaniel Lezcano err = ip6_flowlabel_init(); 9150a3e78acSDaniel Lezcano if (err) 9160a3e78acSDaniel Lezcano goto ip6_flowlabel_fail; 9171da177e4SLinus Torvalds err = addrconf_init(); 9181da177e4SLinus Torvalds if (err) 9191da177e4SLinus Torvalds goto addrconf_fail; 9201da177e4SLinus Torvalds 9211da177e4SLinus Torvalds /* Init v6 extension headers. */ 922248b238dSDaniel Lezcano err = ipv6_exthdrs_init(); 923248b238dSDaniel Lezcano if (err) 924248b238dSDaniel Lezcano goto ipv6_exthdrs_fail; 925248b238dSDaniel Lezcano 926853cbbaaSDaniel Lezcano err = ipv6_frag_init(); 927853cbbaaSDaniel Lezcano if (err) 928853cbbaaSDaniel Lezcano goto ipv6_frag_fail; 9291da177e4SLinus Torvalds 9301da177e4SLinus Torvalds /* Init v6 transport protocols. */ 9317f4e4868SDaniel Lezcano err = udpv6_init(); 9327f4e4868SDaniel Lezcano if (err) 9337f4e4868SDaniel Lezcano goto udpv6_fail; 934e2ed4052SHerbert Xu 9357f4e4868SDaniel Lezcano err = udplitev6_init(); 9367f4e4868SDaniel Lezcano if (err) 9377f4e4868SDaniel Lezcano goto udplitev6_fail; 9387f4e4868SDaniel Lezcano 9397f4e4868SDaniel Lezcano err = tcpv6_init(); 9407f4e4868SDaniel Lezcano if (err) 9417f4e4868SDaniel Lezcano goto tcpv6_fail; 9427f4e4868SDaniel Lezcano 9437f4e4868SDaniel Lezcano err = ipv6_packet_init(); 9447f4e4868SDaniel Lezcano if (err) 9457f4e4868SDaniel Lezcano goto ipv6_packet_fail; 94694911fe3SBenjamin Thery 9476d0bfe22SLorenzo Colitti err = pingv6_init(); 9486d0bfe22SLorenzo Colitti if (err) 9496d0bfe22SLorenzo Colitti goto pingv6_fail; 9506d0bfe22SLorenzo Colitti 95194911fe3SBenjamin Thery #ifdef CONFIG_SYSCTL 95294911fe3SBenjamin Thery err = ipv6_sysctl_register(); 95394911fe3SBenjamin Thery if (err) 95494911fe3SBenjamin Thery goto sysctl_fail; 95594911fe3SBenjamin Thery #endif 9561da177e4SLinus Torvalds out: 9571da177e4SLinus Torvalds return err; 9581da177e4SLinus Torvalds 95994911fe3SBenjamin Thery #ifdef CONFIG_SYSCTL 96094911fe3SBenjamin Thery sysctl_fail: 961eca42aafSVlad Yasevich pingv6_exit(); 96294911fe3SBenjamin Thery #endif 9636d0bfe22SLorenzo Colitti pingv6_fail: 964eca42aafSVlad Yasevich ipv6_packet_cleanup(); 9657f4e4868SDaniel Lezcano ipv6_packet_fail: 9667f4e4868SDaniel Lezcano tcpv6_exit(); 9677f4e4868SDaniel Lezcano tcpv6_fail: 9687f4e4868SDaniel Lezcano udplitev6_exit(); 9697f4e4868SDaniel Lezcano udplitev6_fail: 9707f4e4868SDaniel Lezcano udpv6_exit(); 9717f4e4868SDaniel Lezcano udpv6_fail: 9727f4e4868SDaniel Lezcano ipv6_frag_exit(); 973853cbbaaSDaniel Lezcano ipv6_frag_fail: 974853cbbaaSDaniel Lezcano ipv6_exthdrs_exit(); 975248b238dSDaniel Lezcano ipv6_exthdrs_fail: 976248b238dSDaniel Lezcano addrconf_cleanup(); 9771da177e4SLinus Torvalds addrconf_fail: 9781da177e4SLinus Torvalds ip6_flowlabel_cleanup(); 9790a3e78acSDaniel Lezcano ip6_flowlabel_fail: 9802c861cc6SMichal Kubeček ndisc_late_cleanup(); 9812c861cc6SMichal Kubeček ndisc_late_fail: 9821da177e4SLinus Torvalds ip6_route_cleanup(); 983e2fddf5eSDaniel Lezcano ip6_route_fail: 9841da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 9851da177e4SLinus Torvalds if6_proc_exit(); 9861da177e4SLinus Torvalds proc_if6_fail: 9871da177e4SLinus Torvalds ipv6_misc_proc_exit(); 9881da177e4SLinus Torvalds proc_misc6_fail: 989ba4e58ecSGerrit Renker udplite6_proc_exit(); 990ba4e58ecSGerrit Renker proc_udplite6_fail: 9911da177e4SLinus Torvalds raw6_proc_exit(); 9921da177e4SLinus Torvalds proc_raw6_fail: 9931da177e4SLinus Torvalds #endif 9942cc7d573SHarald Welte ipv6_netfilter_fini(); 9952cc7d573SHarald Welte netfilter_fail: 9961da177e4SLinus Torvalds igmp6_cleanup(); 9971da177e4SLinus Torvalds igmp_fail: 9981da177e4SLinus Torvalds ndisc_cleanup(); 9991da177e4SLinus Torvalds ndisc_fail: 1000623d1a1aSWang Chen ip6_mr_cleanup(); 1001623d1a1aSWang Chen ipmr_fail: 10021da177e4SLinus Torvalds icmpv6_cleanup(); 10031da177e4SLinus Torvalds icmp_fail: 100481c1c178SDaniel Lezcano unregister_pernet_subsys(&inet6_net_ops); 100581c1c178SDaniel Lezcano register_pernet_fail: 10068eb55910SDavid S. Miller sock_unregister(PF_INET6); 1007e2fddf5eSDaniel Lezcano rtnl_unregister_all(PF_INET6); 10087f4e4868SDaniel Lezcano out_sock_register_fail: 10097f4e4868SDaniel Lezcano rawv6_exit(); 10106d0bfe22SLorenzo Colitti out_unregister_ping_proto: 10116d0bfe22SLorenzo Colitti proto_unregister(&pingv6_prot); 10121da177e4SLinus Torvalds out_unregister_raw_proto: 10131da177e4SLinus Torvalds proto_unregister(&rawv6_prot); 1014ba4e58ecSGerrit Renker out_unregister_udplite_proto: 1015ba4e58ecSGerrit Renker proto_unregister(&udplitev6_prot); 10161da177e4SLinus Torvalds out_unregister_udp_proto: 10171da177e4SLinus Torvalds proto_unregister(&udpv6_prot); 10181da177e4SLinus Torvalds out_unregister_tcp_proto: 10191da177e4SLinus Torvalds proto_unregister(&tcpv6_prot); 10201da177e4SLinus Torvalds goto out; 10211da177e4SLinus Torvalds } 10221da177e4SLinus Torvalds module_init(inet6_init); 10231da177e4SLinus Torvalds 10241da177e4SLinus Torvalds MODULE_ALIAS_NETPROTO(PF_INET6); 1025