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> 521da177e4SLinus Torvalds #include <net/ipip.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> 591da177e4SLinus Torvalds #ifdef CONFIG_IPV6_TUNNEL 601da177e4SLinus Torvalds #include <net/ip6_tunnel.h> 611da177e4SLinus Torvalds #endif 621da177e4SLinus Torvalds 631da177e4SLinus Torvalds #include <asm/uaccess.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 81647c0c70SEldad Zack static int disable_ipv6_mod; 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; 163af31f412SEric W. Biederman if (sock->type == SOCK_RAW && !kern && 164af31f412SEric W. Biederman !ns_capable(net->user_ns, CAP_NET_RAW)) 1651da177e4SLinus Torvalds goto out_rcu_unlock; 1661da177e4SLinus Torvalds 1671da177e4SLinus Torvalds sock->ops = answer->ops; 1681da177e4SLinus Torvalds answer_prot = answer->prot; 1691da177e4SLinus Torvalds answer_no_check = answer->no_check; 1701da177e4SLinus Torvalds answer_flags = answer->flags; 1711da177e4SLinus Torvalds rcu_read_unlock(); 1721da177e4SLinus Torvalds 173547b792cSIlpo Järvinen WARN_ON(answer_prot->slab == NULL); 1741da177e4SLinus Torvalds 175af1afe86SYOSHIFUJI Hideaki err = -ENOBUFS; 1766257ff21SPavel Emelyanov sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot); 1771da177e4SLinus Torvalds if (sk == NULL) 1781da177e4SLinus Torvalds goto out; 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds sock_init_data(sock, sk); 1811da177e4SLinus Torvalds 182af1afe86SYOSHIFUJI Hideaki err = 0; 1831da177e4SLinus Torvalds sk->sk_no_check = answer_no_check; 1841da177e4SLinus Torvalds if (INET_PROTOSW_REUSE & answer_flags) 1854a17fd52SPavel Emelyanov sk->sk_reuse = SK_CAN_REUSE; 1861da177e4SLinus Torvalds 1871da177e4SLinus Torvalds inet = inet_sk(sk); 188469de9b9SPaul Moore inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0; 1891da177e4SLinus Torvalds 1901da177e4SLinus Torvalds if (SOCK_RAW == sock->type) { 191c720c7e8SEric Dumazet inet->inet_num = protocol; 1921da177e4SLinus Torvalds if (IPPROTO_RAW == protocol) 1931da177e4SLinus Torvalds inet->hdrincl = 1; 1941da177e4SLinus Torvalds } 1951da177e4SLinus Torvalds 196e6848976SArnaldo Carvalho de Melo sk->sk_destruct = inet_sock_destruct; 1971da177e4SLinus Torvalds sk->sk_family = PF_INET6; 1981da177e4SLinus Torvalds sk->sk_protocol = protocol; 1991da177e4SLinus Torvalds 2001da177e4SLinus Torvalds sk->sk_backlog_rcv = answer->prot->backlog_rcv; 2011da177e4SLinus Torvalds 2021da177e4SLinus Torvalds inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk); 2031da177e4SLinus Torvalds np->hop_limit = -1; 204f935aa9eSDavid S. Miller np->mcast_hops = IPV6_DEFAULT_MCASTHOPS; 2051da177e4SLinus Torvalds np->mc_loop = 1; 2061da177e4SLinus Torvalds np->pmtudisc = IPV6_PMTUDISC_WANT; 2072e761e05SPavel Emelyanov np->ipv6only = net->ipv6.sysctl.bindv6only; 2081da177e4SLinus Torvalds 2091da177e4SLinus Torvalds /* Init the ipv4 part of the socket since we can have sockets 2101da177e4SLinus Torvalds * using v6 API for ipv4. 2111da177e4SLinus Torvalds */ 2121da177e4SLinus Torvalds inet->uc_ttl = -1; 2131da177e4SLinus Torvalds 2141da177e4SLinus Torvalds inet->mc_loop = 1; 2151da177e4SLinus Torvalds inet->mc_ttl = 1; 2161da177e4SLinus Torvalds inet->mc_index = 0; 2171da177e4SLinus Torvalds inet->mc_list = NULL; 2184c507d28SJiri Benc inet->rcv_tos = 0; 2191da177e4SLinus Torvalds 2201da177e4SLinus Torvalds if (ipv4_config.no_pmtu_disc) 2211da177e4SLinus Torvalds inet->pmtudisc = IP_PMTUDISC_DONT; 2221da177e4SLinus Torvalds else 2231da177e4SLinus Torvalds inet->pmtudisc = IP_PMTUDISC_WANT; 224e6848976SArnaldo Carvalho de Melo /* 225e6848976SArnaldo Carvalho de Melo * Increment only the relevant sk_prot->socks debug field, this changes 226e6848976SArnaldo Carvalho de Melo * the previous behaviour of incrementing both the equivalent to 227e6848976SArnaldo Carvalho de Melo * answer->prot->socks (inet6_sock_nr) and inet_sock_nr. 228e6848976SArnaldo Carvalho de Melo * 229e6848976SArnaldo Carvalho de Melo * This allows better debug granularity as we'll know exactly how many 230e6848976SArnaldo Carvalho de Melo * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6 231e6848976SArnaldo Carvalho de Melo * transport protocol socks. -acme 232e6848976SArnaldo Carvalho de Melo */ 233e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_inc(sk); 2341da177e4SLinus Torvalds 235c720c7e8SEric Dumazet if (inet->inet_num) { 2361da177e4SLinus Torvalds /* It assumes that any protocol which allows 2371da177e4SLinus Torvalds * the user to assign a number at socket 2381da177e4SLinus Torvalds * creation time automatically shares. 2391da177e4SLinus Torvalds */ 240c720c7e8SEric Dumazet inet->inet_sport = htons(inet->inet_num); 2411da177e4SLinus Torvalds sk->sk_prot->hash(sk); 2421da177e4SLinus Torvalds } 2431da177e4SLinus Torvalds if (sk->sk_prot->init) { 244af1afe86SYOSHIFUJI Hideaki err = sk->sk_prot->init(sk); 245af1afe86SYOSHIFUJI Hideaki if (err) { 2461da177e4SLinus Torvalds sk_common_release(sk); 2471da177e4SLinus Torvalds goto out; 2481da177e4SLinus Torvalds } 2491da177e4SLinus Torvalds } 2501da177e4SLinus Torvalds out: 251af1afe86SYOSHIFUJI Hideaki return err; 2521da177e4SLinus Torvalds out_rcu_unlock: 2531da177e4SLinus Torvalds rcu_read_unlock(); 2541da177e4SLinus Torvalds goto out; 2551da177e4SLinus Torvalds } 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds 2581da177e4SLinus Torvalds /* bind for INET6 API */ 2591da177e4SLinus Torvalds int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) 2601da177e4SLinus Torvalds { 2611da177e4SLinus Torvalds struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr; 2621da177e4SLinus Torvalds struct sock *sk = sock->sk; 2631da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 2641da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 2653b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(sk); 266fd683222SAl Viro __be32 v4addr = 0; 2671da177e4SLinus Torvalds unsigned short snum; 2681da177e4SLinus Torvalds int addr_type = 0; 2691da177e4SLinus Torvalds int err = 0; 2701da177e4SLinus Torvalds 2711da177e4SLinus Torvalds /* If the socket has its own bind function then use it. */ 2721da177e4SLinus Torvalds if (sk->sk_prot->bind) 2731da177e4SLinus Torvalds return sk->sk_prot->bind(sk, uaddr, addr_len); 2741da177e4SLinus Torvalds 2751da177e4SLinus Torvalds if (addr_len < SIN6_LEN_RFC2133) 2761da177e4SLinus Torvalds return -EINVAL; 2775a079c30SMarcus Meissner 2785a079c30SMarcus Meissner if (addr->sin6_family != AF_INET6) 279c349a528SMarcus Meissner return -EAFNOSUPPORT; 2805a079c30SMarcus Meissner 2811da177e4SLinus Torvalds addr_type = ipv6_addr_type(&addr->sin6_addr); 2821da177e4SLinus Torvalds if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM) 2831da177e4SLinus Torvalds return -EINVAL; 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds snum = ntohs(addr->sin6_port); 2863594698aSEric W. Biederman if (snum && snum < PROT_SOCK && !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) 2871da177e4SLinus Torvalds return -EACCES; 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds lock_sock(sk); 2901da177e4SLinus Torvalds 2911da177e4SLinus Torvalds /* Check these errors (active socket, double bind). */ 292c720c7e8SEric Dumazet if (sk->sk_state != TCP_CLOSE || inet->inet_num) { 2931da177e4SLinus Torvalds err = -EINVAL; 2941da177e4SLinus Torvalds goto out; 2951da177e4SLinus Torvalds } 2961da177e4SLinus Torvalds 2971da177e4SLinus Torvalds /* Check if the address belongs to the host. */ 2981da177e4SLinus Torvalds if (addr_type == IPV6_ADDR_MAPPED) { 29963d9950bSVlad Yasevich int chk_addr_ret; 30063d9950bSVlad Yasevich 301783ed5a7SVlad Yasevich /* Binding to v4-mapped address on a v6-only socket 302783ed5a7SVlad Yasevich * makes no sense 303783ed5a7SVlad Yasevich */ 304783ed5a7SVlad Yasevich if (np->ipv6only) { 305783ed5a7SVlad Yasevich err = -EINVAL; 306783ed5a7SVlad Yasevich goto out; 307783ed5a7SVlad Yasevich } 30863d9950bSVlad Yasevich 309a34f0b31SUwe Kleine-König /* Reproduce AF_INET checks to make the bindings consistent */ 3101da177e4SLinus Torvalds v4addr = addr->sin6_addr.s6_addr32[3]; 31163d9950bSVlad Yasevich chk_addr_ret = inet_addr_type(net, v4addr); 31263d9950bSVlad Yasevich if (!sysctl_ip_nonlocal_bind && 31363d9950bSVlad Yasevich !(inet->freebind || inet->transparent) && 31463d9950bSVlad Yasevich v4addr != htonl(INADDR_ANY) && 31563d9950bSVlad Yasevich chk_addr_ret != RTN_LOCAL && 31663d9950bSVlad Yasevich chk_addr_ret != RTN_MULTICAST && 317ca6982b8SBruno Prémont chk_addr_ret != RTN_BROADCAST) { 318ca6982b8SBruno Prémont err = -EADDRNOTAVAIL; 3191da177e4SLinus Torvalds goto out; 320ca6982b8SBruno Prémont } 3211da177e4SLinus Torvalds } else { 3221da177e4SLinus Torvalds if (addr_type != IPV6_ADDR_ANY) { 3231da177e4SLinus Torvalds struct net_device *dev = NULL; 3241da177e4SLinus Torvalds 32516ba5e8eSEric Dumazet rcu_read_lock(); 3261da177e4SLinus Torvalds if (addr_type & IPV6_ADDR_LINKLOCAL) { 3271da177e4SLinus Torvalds if (addr_len >= sizeof(struct sockaddr_in6) && 3281da177e4SLinus Torvalds addr->sin6_scope_id) { 3291da177e4SLinus Torvalds /* Override any existing binding, if another one 3301da177e4SLinus Torvalds * is supplied by user. 3311da177e4SLinus Torvalds */ 3321da177e4SLinus Torvalds sk->sk_bound_dev_if = addr->sin6_scope_id; 3331da177e4SLinus Torvalds } 3341da177e4SLinus Torvalds 3351da177e4SLinus Torvalds /* Binding to link-local address requires an interface */ 3361da177e4SLinus Torvalds if (!sk->sk_bound_dev_if) { 3371da177e4SLinus Torvalds err = -EINVAL; 33816ba5e8eSEric Dumazet goto out_unlock; 3391da177e4SLinus Torvalds } 34016ba5e8eSEric Dumazet dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if); 3411da177e4SLinus Torvalds if (!dev) { 3421da177e4SLinus Torvalds err = -ENODEV; 34316ba5e8eSEric Dumazet goto out_unlock; 3441da177e4SLinus Torvalds } 3451da177e4SLinus Torvalds } 3461da177e4SLinus Torvalds 3471da177e4SLinus Torvalds /* ipv4 addr of the socket is invalid. Only the 3481da177e4SLinus Torvalds * unspecified and mapped address have a v4 equivalent. 3491da177e4SLinus Torvalds */ 3501da177e4SLinus Torvalds v4addr = LOOPBACK4_IPV6; 3511da177e4SLinus Torvalds if (!(addr_type & IPV6_ADDR_MULTICAST)) { 352f74024d9SMaciej Żenczykowski if (!(inet->freebind || inet->transparent) && 3530a513f6aSBalazs Scheidler !ipv6_chk_addr(net, &addr->sin6_addr, 354bfeade08SDaniel Lezcano dev, 0)) { 3551da177e4SLinus Torvalds err = -EADDRNOTAVAIL; 35616ba5e8eSEric Dumazet goto out_unlock; 3571da177e4SLinus Torvalds } 3581da177e4SLinus Torvalds } 35916ba5e8eSEric Dumazet rcu_read_unlock(); 3601da177e4SLinus Torvalds } 3611da177e4SLinus Torvalds } 3621da177e4SLinus Torvalds 363c720c7e8SEric Dumazet inet->inet_rcv_saddr = v4addr; 364c720c7e8SEric Dumazet inet->inet_saddr = v4addr; 3651da177e4SLinus Torvalds 3664e3fd7a0SAlexey Dobriyan np->rcv_saddr = addr->sin6_addr; 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds if (!(addr_type & IPV6_ADDR_MULTICAST)) 3694e3fd7a0SAlexey Dobriyan np->saddr = addr->sin6_addr; 3701da177e4SLinus Torvalds 3711da177e4SLinus Torvalds /* Make sure we are allowed to bind here. */ 3721da177e4SLinus Torvalds if (sk->sk_prot->get_port(sk, snum)) { 3731da177e4SLinus Torvalds inet_reset_saddr(sk); 3741da177e4SLinus Torvalds err = -EADDRINUSE; 3751da177e4SLinus Torvalds goto out; 3761da177e4SLinus Torvalds } 3771da177e4SLinus Torvalds 3780f8d3c7aSVlad Yasevich if (addr_type != IPV6_ADDR_ANY) { 3791da177e4SLinus Torvalds sk->sk_userlocks |= SOCK_BINDADDR_LOCK; 3800f8d3c7aSVlad Yasevich if (addr_type != IPV6_ADDR_MAPPED) 3810f8d3c7aSVlad Yasevich np->ipv6only = 1; 3820f8d3c7aSVlad Yasevich } 3831da177e4SLinus Torvalds if (snum) 3841da177e4SLinus Torvalds sk->sk_userlocks |= SOCK_BINDPORT_LOCK; 385c720c7e8SEric Dumazet inet->inet_sport = htons(inet->inet_num); 386c720c7e8SEric Dumazet inet->inet_dport = 0; 387c720c7e8SEric Dumazet inet->inet_daddr = 0; 3881da177e4SLinus Torvalds out: 3891da177e4SLinus Torvalds release_sock(sk); 3901da177e4SLinus Torvalds return err; 39116ba5e8eSEric Dumazet out_unlock: 39216ba5e8eSEric Dumazet rcu_read_unlock(); 39316ba5e8eSEric Dumazet goto out; 3941da177e4SLinus Torvalds } 3957159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(inet6_bind); 3967159039aSYOSHIFUJI Hideaki 3971da177e4SLinus Torvalds int inet6_release(struct socket *sock) 3981da177e4SLinus Torvalds { 3991da177e4SLinus Torvalds struct sock *sk = sock->sk; 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds if (sk == NULL) 4021da177e4SLinus Torvalds return -EINVAL; 4031da177e4SLinus Torvalds 4041da177e4SLinus Torvalds /* Free mc lists */ 4051da177e4SLinus Torvalds ipv6_sock_mc_close(sk); 4061da177e4SLinus Torvalds 4071da177e4SLinus Torvalds /* Free ac lists */ 4081da177e4SLinus Torvalds ipv6_sock_ac_close(sk); 4091da177e4SLinus Torvalds 4101da177e4SLinus Torvalds return inet_release(sock); 4111da177e4SLinus Torvalds } 4127159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(inet6_release); 4137159039aSYOSHIFUJI Hideaki 4147d06b2e0SBrian Haley void inet6_destroy_sock(struct sock *sk) 4151da177e4SLinus Torvalds { 4161da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 4171da177e4SLinus Torvalds struct sk_buff *skb; 4181da177e4SLinus Torvalds struct ipv6_txoptions *opt; 4191da177e4SLinus Torvalds 4201da177e4SLinus Torvalds /* Release rx options */ 4211da177e4SLinus Torvalds 422647c0c70SEldad Zack skb = xchg(&np->pktoptions, NULL); 423647c0c70SEldad Zack if (skb != NULL) 4241da177e4SLinus Torvalds kfree_skb(skb); 4251da177e4SLinus Torvalds 426647c0c70SEldad Zack skb = xchg(&np->rxpmtu, NULL); 427647c0c70SEldad Zack if (skb != NULL) 4284b340ae2SBrian Haley kfree_skb(skb); 4294b340ae2SBrian Haley 4301da177e4SLinus Torvalds /* Free flowlabels */ 4311da177e4SLinus Torvalds fl6_free_socklist(sk); 4321da177e4SLinus Torvalds 4331da177e4SLinus Torvalds /* Free tx options */ 4341da177e4SLinus Torvalds 435647c0c70SEldad Zack opt = xchg(&np->opt, NULL); 436647c0c70SEldad Zack if (opt != NULL) 4371da177e4SLinus Torvalds sock_kfree_s(sk, opt, opt->tot_len); 4381da177e4SLinus Torvalds } 4393cf3dc6cSArnaldo Carvalho de Melo EXPORT_SYMBOL_GPL(inet6_destroy_sock); 4403cf3dc6cSArnaldo Carvalho de Melo 4411da177e4SLinus Torvalds /* 4421da177e4SLinus Torvalds * This does both peername and sockname. 4431da177e4SLinus Torvalds */ 4441da177e4SLinus Torvalds 4451da177e4SLinus Torvalds int inet6_getname(struct socket *sock, struct sockaddr *uaddr, 4461da177e4SLinus Torvalds int *uaddr_len, int peer) 4471da177e4SLinus Torvalds { 4481da177e4SLinus Torvalds struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr; 4491da177e4SLinus Torvalds struct sock *sk = sock->sk; 4501da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 4511da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 4521da177e4SLinus Torvalds 4531da177e4SLinus Torvalds sin->sin6_family = AF_INET6; 4541da177e4SLinus Torvalds sin->sin6_flowinfo = 0; 4551da177e4SLinus Torvalds sin->sin6_scope_id = 0; 4561da177e4SLinus Torvalds if (peer) { 457c720c7e8SEric Dumazet if (!inet->inet_dport) 4581da177e4SLinus Torvalds return -ENOTCONN; 4591da177e4SLinus Torvalds if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && 4601da177e4SLinus Torvalds peer == 1) 4611da177e4SLinus Torvalds return -ENOTCONN; 462c720c7e8SEric Dumazet sin->sin6_port = inet->inet_dport; 4634e3fd7a0SAlexey Dobriyan sin->sin6_addr = np->daddr; 4641da177e4SLinus Torvalds if (np->sndflow) 4651da177e4SLinus Torvalds sin->sin6_flowinfo = np->flow_label; 4661da177e4SLinus Torvalds } else { 4671da177e4SLinus Torvalds if (ipv6_addr_any(&np->rcv_saddr)) 4684e3fd7a0SAlexey Dobriyan sin->sin6_addr = np->saddr; 4691da177e4SLinus Torvalds else 4704e3fd7a0SAlexey Dobriyan sin->sin6_addr = np->rcv_saddr; 4711da177e4SLinus Torvalds 472c720c7e8SEric Dumazet sin->sin6_port = inet->inet_sport; 4731da177e4SLinus Torvalds } 4741da177e4SLinus Torvalds if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL) 4751da177e4SLinus Torvalds sin->sin6_scope_id = sk->sk_bound_dev_if; 4761da177e4SLinus Torvalds *uaddr_len = sizeof(*sin); 477a02cec21SEric Dumazet return 0; 4781da177e4SLinus Torvalds } 4797159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(inet6_getname); 4807159039aSYOSHIFUJI Hideaki 4811da177e4SLinus Torvalds int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 4821da177e4SLinus Torvalds { 4831da177e4SLinus Torvalds struct sock *sk = sock->sk; 4843b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(sk); 4851da177e4SLinus Torvalds 486647c0c70SEldad Zack switch (cmd) { 4871da177e4SLinus Torvalds case SIOCGSTAMP: 4881da177e4SLinus Torvalds return sock_get_timestamp(sk, (struct timeval __user *)arg); 4891da177e4SLinus Torvalds 490ae40eb1eSEric Dumazet case SIOCGSTAMPNS: 491ae40eb1eSEric Dumazet return sock_get_timestampns(sk, (struct timespec __user *)arg); 492ae40eb1eSEric Dumazet 4931da177e4SLinus Torvalds case SIOCADDRT: 4941da177e4SLinus Torvalds case SIOCDELRT: 4951da177e4SLinus Torvalds 496a02cec21SEric Dumazet return ipv6_route_ioctl(net, cmd, (void __user *)arg); 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvalds case SIOCSIFADDR: 499af284937SDaniel Lezcano return addrconf_add_ifaddr(net, (void __user *) arg); 5001da177e4SLinus Torvalds case SIOCDIFADDR: 501af284937SDaniel Lezcano return addrconf_del_ifaddr(net, (void __user *) arg); 5021da177e4SLinus Torvalds case SIOCSIFDSTADDR: 503af284937SDaniel Lezcano return addrconf_set_dstaddr(net, (void __user *) arg); 5041da177e4SLinus Torvalds default: 505b5e5fa5eSChristoph Hellwig if (!sk->sk_prot->ioctl) 506b5e5fa5eSChristoph Hellwig return -ENOIOCTLCMD; 507b5e5fa5eSChristoph Hellwig return sk->sk_prot->ioctl(sk, cmd, arg); 5081da177e4SLinus Torvalds } 5091da177e4SLinus Torvalds /*NOTREACHED*/ 510a02cec21SEric Dumazet return 0; 5111da177e4SLinus Torvalds } 5127159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(inet6_ioctl); 5137159039aSYOSHIFUJI Hideaki 51490ddc4f0SEric Dumazet const struct proto_ops inet6_stream_ops = { 5151da177e4SLinus Torvalds .family = PF_INET6, 5161da177e4SLinus Torvalds .owner = THIS_MODULE, 5171da177e4SLinus Torvalds .release = inet6_release, 5181da177e4SLinus Torvalds .bind = inet6_bind, 5191da177e4SLinus Torvalds .connect = inet_stream_connect, /* ok */ 5201da177e4SLinus Torvalds .socketpair = sock_no_socketpair, /* a do nothing */ 5211da177e4SLinus Torvalds .accept = inet_accept, /* ok */ 5221da177e4SLinus Torvalds .getname = inet6_getname, 5231da177e4SLinus Torvalds .poll = tcp_poll, /* ok */ 5241da177e4SLinus Torvalds .ioctl = inet6_ioctl, /* must change */ 5251da177e4SLinus Torvalds .listen = inet_listen, /* ok */ 5261da177e4SLinus Torvalds .shutdown = inet_shutdown, /* ok */ 5271da177e4SLinus Torvalds .setsockopt = sock_common_setsockopt, /* ok */ 5281da177e4SLinus Torvalds .getsockopt = sock_common_getsockopt, /* ok */ 5297ba42910SChangli Gao .sendmsg = inet_sendmsg, /* ok */ 5307ba42910SChangli Gao .recvmsg = inet_recvmsg, /* ok */ 531543d9cfeSArnaldo Carvalho de Melo .mmap = sock_no_mmap, 5327ba42910SChangli Gao .sendpage = inet_sendpage, 533a0974dd3SJens Axboe .splice_read = tcp_splice_read, 5343fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 5353fdadf7dSDmitry Mishin .compat_setsockopt = compat_sock_common_setsockopt, 5363fdadf7dSDmitry Mishin .compat_getsockopt = compat_sock_common_getsockopt, 5373fdadf7dSDmitry Mishin #endif 5381da177e4SLinus Torvalds }; 5391da177e4SLinus Torvalds 54090ddc4f0SEric Dumazet const struct proto_ops inet6_dgram_ops = { 5411da177e4SLinus Torvalds .family = PF_INET6, 5421da177e4SLinus Torvalds .owner = THIS_MODULE, 5431da177e4SLinus Torvalds .release = inet6_release, 5441da177e4SLinus Torvalds .bind = inet6_bind, 5451da177e4SLinus Torvalds .connect = inet_dgram_connect, /* ok */ 5461da177e4SLinus Torvalds .socketpair = sock_no_socketpair, /* a do nothing */ 5471da177e4SLinus Torvalds .accept = sock_no_accept, /* a do nothing */ 5481da177e4SLinus Torvalds .getname = inet6_getname, 5491da177e4SLinus Torvalds .poll = udp_poll, /* ok */ 5501da177e4SLinus Torvalds .ioctl = inet6_ioctl, /* must change */ 5511da177e4SLinus Torvalds .listen = sock_no_listen, /* ok */ 5521da177e4SLinus Torvalds .shutdown = inet_shutdown, /* ok */ 5531da177e4SLinus Torvalds .setsockopt = sock_common_setsockopt, /* ok */ 5541da177e4SLinus Torvalds .getsockopt = sock_common_getsockopt, /* ok */ 5551da177e4SLinus Torvalds .sendmsg = inet_sendmsg, /* ok */ 5567ba42910SChangli Gao .recvmsg = inet_recvmsg, /* ok */ 5571da177e4SLinus Torvalds .mmap = sock_no_mmap, 5581da177e4SLinus Torvalds .sendpage = sock_no_sendpage, 559543d9cfeSArnaldo Carvalho de Melo #ifdef CONFIG_COMPAT 560543d9cfeSArnaldo Carvalho de Melo .compat_setsockopt = compat_sock_common_setsockopt, 561543d9cfeSArnaldo Carvalho de Melo .compat_getsockopt = compat_sock_common_getsockopt, 562543d9cfeSArnaldo Carvalho de Melo #endif 5631da177e4SLinus Torvalds }; 5641da177e4SLinus Torvalds 565ec1b4cf7SStephen Hemminger static const struct net_proto_family inet6_family_ops = { 5661da177e4SLinus Torvalds .family = PF_INET6, 5671da177e4SLinus Torvalds .create = inet6_create, 5681da177e4SLinus Torvalds .owner = THIS_MODULE, 5691da177e4SLinus Torvalds }; 5701da177e4SLinus Torvalds 57187c3efbfSDaniel Lezcano int inet6_register_protosw(struct inet_protosw *p) 5721da177e4SLinus Torvalds { 5731da177e4SLinus Torvalds struct list_head *lh; 5741da177e4SLinus Torvalds struct inet_protosw *answer; 5751da177e4SLinus Torvalds struct list_head *last_perm; 57687c3efbfSDaniel Lezcano int protocol = p->protocol; 57787c3efbfSDaniel Lezcano int ret; 5781da177e4SLinus Torvalds 5791da177e4SLinus Torvalds spin_lock_bh(&inetsw6_lock); 5801da177e4SLinus Torvalds 58187c3efbfSDaniel Lezcano ret = -EINVAL; 5821da177e4SLinus Torvalds if (p->type >= SOCK_MAX) 5831da177e4SLinus Torvalds goto out_illegal; 5841da177e4SLinus Torvalds 5851da177e4SLinus Torvalds /* If we are trying to override a permanent protocol, bail. */ 5861da177e4SLinus Torvalds answer = NULL; 58787c3efbfSDaniel Lezcano ret = -EPERM; 5881da177e4SLinus Torvalds last_perm = &inetsw6[p->type]; 5891da177e4SLinus Torvalds list_for_each(lh, &inetsw6[p->type]) { 5901da177e4SLinus Torvalds answer = list_entry(lh, struct inet_protosw, list); 5911da177e4SLinus Torvalds 5921da177e4SLinus Torvalds /* Check only the non-wild match. */ 5931da177e4SLinus Torvalds if (INET_PROTOSW_PERMANENT & answer->flags) { 5941da177e4SLinus Torvalds if (protocol == answer->protocol) 5951da177e4SLinus Torvalds break; 5961da177e4SLinus Torvalds last_perm = lh; 5971da177e4SLinus Torvalds } 5981da177e4SLinus Torvalds 5991da177e4SLinus Torvalds answer = NULL; 6001da177e4SLinus Torvalds } 6011da177e4SLinus Torvalds if (answer) 6021da177e4SLinus Torvalds goto out_permanent; 6031da177e4SLinus Torvalds 6041da177e4SLinus Torvalds /* Add the new entry after the last permanent entry if any, so that 6051da177e4SLinus Torvalds * the new entry does not override a permanent entry when matched with 6061da177e4SLinus Torvalds * a wild-card protocol. But it is allowed to override any existing 6071da177e4SLinus Torvalds * non-permanent entry. This means that when we remove this entry, the 6081da177e4SLinus Torvalds * system automatically returns to the old behavior. 6091da177e4SLinus Torvalds */ 6101da177e4SLinus Torvalds list_add_rcu(&p->list, last_perm); 61187c3efbfSDaniel Lezcano ret = 0; 6121da177e4SLinus Torvalds out: 6131da177e4SLinus Torvalds spin_unlock_bh(&inetsw6_lock); 61487c3efbfSDaniel Lezcano return ret; 6151da177e4SLinus Torvalds 6161da177e4SLinus Torvalds out_permanent: 617f3213831SJoe Perches pr_err("Attempt to override permanent protocol %d\n", protocol); 6181da177e4SLinus Torvalds goto out; 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds out_illegal: 621f3213831SJoe Perches pr_err("Ignoring attempt to register invalid socket type %d\n", 6221da177e4SLinus Torvalds p->type); 6231da177e4SLinus Torvalds goto out; 6241da177e4SLinus Torvalds } 6257159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(inet6_register_protosw); 6267159039aSYOSHIFUJI Hideaki 6271da177e4SLinus Torvalds void 6281da177e4SLinus Torvalds inet6_unregister_protosw(struct inet_protosw *p) 6291da177e4SLinus Torvalds { 6301da177e4SLinus Torvalds if (INET_PROTOSW_PERMANENT & p->flags) { 631f3213831SJoe Perches pr_err("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 } 6417159039aSYOSHIFUJI Hideaki EXPORT_SYMBOL(inet6_unregister_protosw); 6427159039aSYOSHIFUJI Hideaki 643b9750ce1SArnaldo Carvalho de Melo int inet6_sk_rebuild_header(struct sock *sk) 644b9750ce1SArnaldo Carvalho de Melo { 645b9750ce1SArnaldo Carvalho de Melo struct ipv6_pinfo *np = inet6_sk(sk); 64668d0c6d3SDavid S. Miller struct dst_entry *dst; 647b9750ce1SArnaldo Carvalho de Melo 648b9750ce1SArnaldo Carvalho de Melo dst = __sk_dst_check(sk, np->dst_cookie); 649b9750ce1SArnaldo Carvalho de Melo 650b9750ce1SArnaldo Carvalho de Melo if (dst == NULL) { 651b9750ce1SArnaldo Carvalho de Melo struct inet_sock *inet = inet_sk(sk); 65220c59de2SArnaud Ebalard struct in6_addr *final_p, final; 6534c9483b2SDavid S. Miller struct flowi6 fl6; 654b9750ce1SArnaldo Carvalho de Melo 6554c9483b2SDavid S. Miller memset(&fl6, 0, sizeof(fl6)); 6564c9483b2SDavid S. Miller fl6.flowi6_proto = sk->sk_protocol; 6574e3fd7a0SAlexey Dobriyan fl6.daddr = np->daddr; 6584e3fd7a0SAlexey Dobriyan fl6.saddr = np->saddr; 6594c9483b2SDavid S. Miller fl6.flowlabel = np->flow_label; 6604c9483b2SDavid S. Miller fl6.flowi6_oif = sk->sk_bound_dev_if; 6614c9483b2SDavid S. Miller fl6.flowi6_mark = sk->sk_mark; 6621958b856SDavid S. Miller fl6.fl6_dport = inet->inet_dport; 6631958b856SDavid S. Miller fl6.fl6_sport = inet->inet_sport; 6644c9483b2SDavid S. Miller security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); 665b9750ce1SArnaldo Carvalho de Melo 6664c9483b2SDavid S. Miller final_p = fl6_update_dst(&fl6, np->opt, &final); 667b9750ce1SArnaldo Carvalho de Melo 6684c9483b2SDavid S. Miller dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false); 66968d0c6d3SDavid S. Miller if (IS_ERR(dst)) { 670b9750ce1SArnaldo Carvalho de Melo sk->sk_route_caps = 0; 67168d0c6d3SDavid S. Miller sk->sk_err_soft = -PTR_ERR(dst); 67268d0c6d3SDavid S. Miller return PTR_ERR(dst); 673b9750ce1SArnaldo Carvalho de Melo } 674b9750ce1SArnaldo Carvalho de Melo 6758e1ef0a9SYOSHIFUJI Hideaki __ip6_dst_store(sk, dst, NULL, NULL); 676b9750ce1SArnaldo Carvalho de Melo } 677b9750ce1SArnaldo Carvalho de Melo 678b9750ce1SArnaldo Carvalho de Melo return 0; 679b9750ce1SArnaldo Carvalho de Melo } 680b9750ce1SArnaldo Carvalho de Melo EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header); 681b9750ce1SArnaldo Carvalho de Melo 68292113bfdSEric Dumazet bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb) 683399c07deSArnaldo Carvalho de Melo { 68492113bfdSEric Dumazet const struct ipv6_pinfo *np = inet6_sk(sk); 68592113bfdSEric Dumazet const struct inet6_skb_parm *opt = IP6CB(skb); 686399c07deSArnaldo Carvalho de Melo 687399c07deSArnaldo Carvalho de Melo if (np->rxopt.all) { 688399c07deSArnaldo Carvalho de Melo if ((opt->hop && (np->rxopt.bits.hopopts || 689399c07deSArnaldo Carvalho de Melo np->rxopt.bits.ohopopts)) || 690d56f90a7SArnaldo Carvalho de Melo ((IPV6_FLOWINFO_MASK & 691d56f90a7SArnaldo Carvalho de Melo *(__be32 *)skb_network_header(skb)) && 692399c07deSArnaldo Carvalho de Melo np->rxopt.bits.rxflow) || 693399c07deSArnaldo Carvalho de Melo (opt->srcrt && (np->rxopt.bits.srcrt || 694399c07deSArnaldo Carvalho de Melo np->rxopt.bits.osrcrt)) || 695399c07deSArnaldo Carvalho de Melo ((opt->dst1 || opt->dst0) && 696399c07deSArnaldo Carvalho de Melo (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts))) 69792113bfdSEric Dumazet return true; 698399c07deSArnaldo Carvalho de Melo } 69992113bfdSEric Dumazet return false; 700399c07deSArnaldo Carvalho de Melo } 701399c07deSArnaldo Carvalho de Melo EXPORT_SYMBOL_GPL(ipv6_opt_accepted); 702399c07deSArnaldo Carvalho de Melo 7037546dd97SStephen Hemminger static struct packet_type ipv6_packet_type __read_mostly = { 70409640e63SHarvey Harrison .type = cpu_to_be16(ETH_P_IPV6), 705662397fdSYOSHIFUJI Hideaki .func = ipv6_rcv, 70622061d80SVlad Yasevich }; 70722061d80SVlad Yasevich 708662397fdSYOSHIFUJI Hideaki static int __init ipv6_packet_init(void) 709662397fdSYOSHIFUJI Hideaki { 710662397fdSYOSHIFUJI Hideaki dev_add_pack(&ipv6_packet_type); 711662397fdSYOSHIFUJI Hideaki return 0; 712662397fdSYOSHIFUJI Hideaki } 713662397fdSYOSHIFUJI Hideaki 714662397fdSYOSHIFUJI Hideaki static void ipv6_packet_cleanup(void) 715662397fdSYOSHIFUJI Hideaki { 716662397fdSYOSHIFUJI Hideaki dev_remove_pack(&ipv6_packet_type); 717662397fdSYOSHIFUJI Hideaki } 718662397fdSYOSHIFUJI Hideaki 719e43291cbSDenis V. Lunev static int __net_init ipv6_init_mibs(struct net *net) 720e43291cbSDenis V. Lunev { 7217d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.udp_stats_in6, 7221823e4c8SEric Dumazet sizeof(struct udp_mib), 7231823e4c8SEric Dumazet __alignof__(struct udp_mib)) < 0) 7240c7ed677SDenis V. Lunev return -ENOMEM; 7257d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.udplite_stats_in6, 7261823e4c8SEric Dumazet sizeof(struct udp_mib), 7271823e4c8SEric Dumazet __alignof__(struct udp_mib)) < 0) 728be713a44SDenis V. Lunev goto err_udplite_mib; 7297d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.ipv6_statistics, 7301823e4c8SEric Dumazet sizeof(struct ipstats_mib), 7311823e4c8SEric Dumazet __alignof__(struct ipstats_mib)) < 0) 7329261e537SDenis V. Lunev goto err_ip_mib; 7337d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.icmpv6_statistics, 7341823e4c8SEric Dumazet sizeof(struct icmpv6_mib), 7351823e4c8SEric Dumazet __alignof__(struct icmpv6_mib)) < 0) 7369261e537SDenis V. Lunev goto err_icmp_mib; 7372a24444fSEric Dumazet net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib), 7382a24444fSEric Dumazet GFP_KERNEL); 7392a24444fSEric Dumazet if (!net->mib.icmpv6msg_statistics) 7409261e537SDenis V. Lunev goto err_icmpmsg_mib; 741e43291cbSDenis V. Lunev return 0; 742be713a44SDenis V. Lunev 7439261e537SDenis V. Lunev err_icmpmsg_mib: 7447d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics); 7459261e537SDenis V. Lunev err_icmp_mib: 7467d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.ipv6_statistics); 7479261e537SDenis V. Lunev err_ip_mib: 7487d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6); 749be713a44SDenis V. Lunev err_udplite_mib: 7507d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.udp_stats_in6); 751be713a44SDenis V. Lunev return -ENOMEM; 752e43291cbSDenis V. Lunev } 753e43291cbSDenis V. Lunev 7542c8c1e72SAlexey Dobriyan static void ipv6_cleanup_mibs(struct net *net) 755e43291cbSDenis V. Lunev { 7567d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.udp_stats_in6); 7577d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6); 7587d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.ipv6_statistics); 7597d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics); 7602a24444fSEric Dumazet kfree(net->mib.icmpv6msg_statistics); 761e43291cbSDenis V. Lunev } 762e43291cbSDenis V. Lunev 763e7dc8494SAlexey Dobriyan static int __net_init inet6_net_init(struct net *net) 76481c1c178SDaniel Lezcano { 7650c96d8c5SDaniel Lezcano int err = 0; 7660c96d8c5SDaniel Lezcano 76799bc9c4eSDaniel Lezcano net->ipv6.sysctl.bindv6only = 0; 76841a76906SDaniel Lezcano net->ipv6.sysctl.icmpv6_time = 1*HZ; 769e71e0349SDaniel Lezcano 770e43291cbSDenis V. Lunev err = ipv6_init_mibs(net); 771e43291cbSDenis V. Lunev if (err) 772e43291cbSDenis V. Lunev return err; 7730c96d8c5SDaniel Lezcano #ifdef CONFIG_PROC_FS 7740c96d8c5SDaniel Lezcano err = udp6_proc_init(net); 7750c96d8c5SDaniel Lezcano if (err) 7760c96d8c5SDaniel Lezcano goto out; 7776f8b13bcSDaniel Lezcano err = tcp6_proc_init(net); 7786f8b13bcSDaniel Lezcano if (err) 7796f8b13bcSDaniel Lezcano goto proc_tcp6_fail; 7806ab57e7eSDaniel Lezcano err = ac6_proc_init(net); 7816ab57e7eSDaniel Lezcano if (err) 7826ab57e7eSDaniel Lezcano goto proc_ac6_fail; 7830c96d8c5SDaniel Lezcano #endif 7840c96d8c5SDaniel Lezcano return err; 7856f8b13bcSDaniel Lezcano 7866f8b13bcSDaniel Lezcano #ifdef CONFIG_PROC_FS 7876ab57e7eSDaniel Lezcano proc_ac6_fail: 7886ab57e7eSDaniel Lezcano tcp6_proc_exit(net); 7896f8b13bcSDaniel Lezcano proc_tcp6_fail: 7906f8b13bcSDaniel Lezcano udp6_proc_exit(net); 791e43291cbSDenis V. Lunev out: 792e43291cbSDenis V. Lunev ipv6_cleanup_mibs(net); 793e43291cbSDenis V. Lunev return err; 7946f8b13bcSDaniel Lezcano #endif 79581c1c178SDaniel Lezcano } 79681c1c178SDaniel Lezcano 7972c8c1e72SAlexey Dobriyan static void __net_exit inet6_net_exit(struct net *net) 79881c1c178SDaniel Lezcano { 7990c96d8c5SDaniel Lezcano #ifdef CONFIG_PROC_FS 8000c96d8c5SDaniel Lezcano udp6_proc_exit(net); 8016f8b13bcSDaniel Lezcano tcp6_proc_exit(net); 8026ab57e7eSDaniel Lezcano ac6_proc_exit(net); 8030c96d8c5SDaniel Lezcano #endif 804e43291cbSDenis V. Lunev ipv6_cleanup_mibs(net); 80581c1c178SDaniel Lezcano } 80681c1c178SDaniel Lezcano 80781c1c178SDaniel Lezcano static struct pernet_operations inet6_net_ops = { 80881c1c178SDaniel Lezcano .init = inet6_net_init, 80981c1c178SDaniel Lezcano .exit = inet6_net_exit, 81081c1c178SDaniel Lezcano }; 81181c1c178SDaniel Lezcano 8121da177e4SLinus Torvalds static int __init inet6_init(void) 8131da177e4SLinus Torvalds { 8141da177e4SLinus Torvalds struct sk_buff *dummy_skb; 8151da177e4SLinus Torvalds struct list_head *r; 816fe7ca2e1SBrian Haley int err = 0; 8171da177e4SLinus Torvalds 818ef047f5eSYOSHIFUJI Hideaki BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb)); 819ef047f5eSYOSHIFUJI Hideaki 820fe7ca2e1SBrian Haley /* Register the socket-side information for inet6_create. */ 821fe7ca2e1SBrian Haley for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) 822fe7ca2e1SBrian Haley INIT_LIST_HEAD(r); 823fe7ca2e1SBrian Haley 82456d417b1SBrian Haley if (disable_ipv6_mod) { 825f3213831SJoe Perches pr_info("Loaded, but administratively disabled, reboot required to enable\n"); 826fe7ca2e1SBrian Haley goto out; 827fe7ca2e1SBrian Haley } 828fe7ca2e1SBrian Haley 8291da177e4SLinus Torvalds err = proto_register(&tcpv6_prot, 1); 8301da177e4SLinus Torvalds if (err) 8311da177e4SLinus Torvalds goto out; 8321da177e4SLinus Torvalds 8331da177e4SLinus Torvalds err = proto_register(&udpv6_prot, 1); 8341da177e4SLinus Torvalds if (err) 8351da177e4SLinus Torvalds goto out_unregister_tcp_proto; 8361da177e4SLinus Torvalds 837ba4e58ecSGerrit Renker err = proto_register(&udplitev6_prot, 1); 8381da177e4SLinus Torvalds if (err) 8391da177e4SLinus Torvalds goto out_unregister_udp_proto; 8401da177e4SLinus Torvalds 841ba4e58ecSGerrit Renker err = proto_register(&rawv6_prot, 1); 842ba4e58ecSGerrit Renker if (err) 843ba4e58ecSGerrit Renker goto out_unregister_udplite_proto; 844ba4e58ecSGerrit Renker 8451da177e4SLinus Torvalds 8461da177e4SLinus Torvalds /* We MUST register RAW sockets before we create the ICMP6, 8471da177e4SLinus Torvalds * IGMP6, or NDISC control sockets. 8481da177e4SLinus Torvalds */ 8497f4e4868SDaniel Lezcano err = rawv6_init(); 8507f4e4868SDaniel Lezcano if (err) 8517f4e4868SDaniel Lezcano goto out_unregister_raw_proto; 8521da177e4SLinus Torvalds 8531da177e4SLinus Torvalds /* Register the family here so that the init calls below will 8541da177e4SLinus Torvalds * be able to create sockets. (?? is this dangerous ??) 8551da177e4SLinus Torvalds */ 8568eb55910SDavid S. Miller err = sock_register(&inet6_family_ops); 8578eb55910SDavid S. Miller if (err) 8587f4e4868SDaniel Lezcano goto out_sock_register_fail; 8591da177e4SLinus Torvalds 8603dc43e3eSGlauber Costa tcpv6_prot.sysctl_mem = init_net.ipv4.sysctl_tcp_mem; 8613dc43e3eSGlauber Costa 8621da177e4SLinus Torvalds /* 8631da177e4SLinus Torvalds * ipngwg API draft makes clear that the correct semantics 8641da177e4SLinus Torvalds * for TCP and UDP is to consider one TCP and UDP instance 86525985edcSLucas De Marchi * in a host available by both INET and INET6 APIs and 8661da177e4SLinus Torvalds * able to communicate via both network protocols. 8671da177e4SLinus Torvalds */ 8681da177e4SLinus Torvalds 86981c1c178SDaniel Lezcano err = register_pernet_subsys(&inet6_net_ops); 87081c1c178SDaniel Lezcano if (err) 87181c1c178SDaniel Lezcano goto register_pernet_fail; 8729b0f976fSDenis V. Lunev err = icmpv6_init(); 8731da177e4SLinus Torvalds if (err) 8741da177e4SLinus Torvalds goto icmp_fail; 875623d1a1aSWang Chen err = ip6_mr_init(); 876623d1a1aSWang Chen if (err) 877623d1a1aSWang Chen goto ipmr_fail; 8789b0f976fSDenis V. Lunev err = ndisc_init(); 8791da177e4SLinus Torvalds if (err) 8801da177e4SLinus Torvalds goto ndisc_fail; 8819b0f976fSDenis V. Lunev err = igmp6_init(); 8821da177e4SLinus Torvalds if (err) 8831da177e4SLinus Torvalds goto igmp_fail; 8842cc7d573SHarald Welte err = ipv6_netfilter_init(); 8852cc7d573SHarald Welte if (err) 8862cc7d573SHarald Welte goto netfilter_fail; 8871da177e4SLinus Torvalds /* Create /proc/foo6 entries. */ 8881da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 8891da177e4SLinus Torvalds err = -ENOMEM; 8901da177e4SLinus Torvalds if (raw6_proc_init()) 8911da177e4SLinus Torvalds goto proc_raw6_fail; 892ba4e58ecSGerrit Renker if (udplite6_proc_init()) 893ba4e58ecSGerrit Renker goto proc_udplite6_fail; 8941da177e4SLinus Torvalds if (ipv6_misc_proc_init()) 8951da177e4SLinus Torvalds goto proc_misc6_fail; 8961da177e4SLinus Torvalds if (if6_proc_init()) 8971da177e4SLinus Torvalds goto proc_if6_fail; 8981da177e4SLinus Torvalds #endif 899e2fddf5eSDaniel Lezcano err = ip6_route_init(); 900e2fddf5eSDaniel Lezcano if (err) 901e2fddf5eSDaniel Lezcano goto ip6_route_fail; 9020a3e78acSDaniel Lezcano err = ip6_flowlabel_init(); 9030a3e78acSDaniel Lezcano if (err) 9040a3e78acSDaniel Lezcano goto ip6_flowlabel_fail; 9051da177e4SLinus Torvalds err = addrconf_init(); 9061da177e4SLinus Torvalds if (err) 9071da177e4SLinus Torvalds goto addrconf_fail; 9081da177e4SLinus Torvalds 9091da177e4SLinus Torvalds /* Init v6 extension headers. */ 910248b238dSDaniel Lezcano err = ipv6_exthdrs_init(); 911248b238dSDaniel Lezcano if (err) 912248b238dSDaniel Lezcano goto ipv6_exthdrs_fail; 913248b238dSDaniel Lezcano 914853cbbaaSDaniel Lezcano err = ipv6_frag_init(); 915853cbbaaSDaniel Lezcano if (err) 916853cbbaaSDaniel Lezcano goto ipv6_frag_fail; 9171da177e4SLinus Torvalds 9181da177e4SLinus Torvalds /* Init v6 transport protocols. */ 9197f4e4868SDaniel Lezcano err = udpv6_init(); 9207f4e4868SDaniel Lezcano if (err) 9217f4e4868SDaniel Lezcano goto udpv6_fail; 922e2ed4052SHerbert Xu 9237f4e4868SDaniel Lezcano err = udplitev6_init(); 9247f4e4868SDaniel Lezcano if (err) 9257f4e4868SDaniel Lezcano goto udplitev6_fail; 9267f4e4868SDaniel Lezcano 9277f4e4868SDaniel Lezcano err = tcpv6_init(); 9287f4e4868SDaniel Lezcano if (err) 9297f4e4868SDaniel Lezcano goto tcpv6_fail; 9307f4e4868SDaniel Lezcano 9317f4e4868SDaniel Lezcano err = ipv6_packet_init(); 9327f4e4868SDaniel Lezcano if (err) 9337f4e4868SDaniel Lezcano goto ipv6_packet_fail; 93494911fe3SBenjamin Thery 93594911fe3SBenjamin Thery #ifdef CONFIG_SYSCTL 93694911fe3SBenjamin Thery err = ipv6_sysctl_register(); 93794911fe3SBenjamin Thery if (err) 93894911fe3SBenjamin Thery goto sysctl_fail; 93994911fe3SBenjamin Thery #endif 9401da177e4SLinus Torvalds out: 9411da177e4SLinus Torvalds return err; 9421da177e4SLinus Torvalds 94394911fe3SBenjamin Thery #ifdef CONFIG_SYSCTL 94494911fe3SBenjamin Thery sysctl_fail: 94594911fe3SBenjamin Thery ipv6_packet_cleanup(); 94694911fe3SBenjamin Thery #endif 9477f4e4868SDaniel Lezcano ipv6_packet_fail: 9487f4e4868SDaniel Lezcano tcpv6_exit(); 9497f4e4868SDaniel Lezcano tcpv6_fail: 9507f4e4868SDaniel Lezcano udplitev6_exit(); 9517f4e4868SDaniel Lezcano udplitev6_fail: 9527f4e4868SDaniel Lezcano udpv6_exit(); 9537f4e4868SDaniel Lezcano udpv6_fail: 9547f4e4868SDaniel Lezcano ipv6_frag_exit(); 955853cbbaaSDaniel Lezcano ipv6_frag_fail: 956853cbbaaSDaniel Lezcano ipv6_exthdrs_exit(); 957248b238dSDaniel Lezcano ipv6_exthdrs_fail: 958248b238dSDaniel Lezcano addrconf_cleanup(); 9591da177e4SLinus Torvalds addrconf_fail: 9601da177e4SLinus Torvalds ip6_flowlabel_cleanup(); 9610a3e78acSDaniel Lezcano ip6_flowlabel_fail: 9621da177e4SLinus Torvalds ip6_route_cleanup(); 963e2fddf5eSDaniel Lezcano ip6_route_fail: 9641da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 9651da177e4SLinus Torvalds if6_proc_exit(); 9661da177e4SLinus Torvalds proc_if6_fail: 9671da177e4SLinus Torvalds ipv6_misc_proc_exit(); 9681da177e4SLinus Torvalds proc_misc6_fail: 969ba4e58ecSGerrit Renker udplite6_proc_exit(); 970ba4e58ecSGerrit Renker proc_udplite6_fail: 9711da177e4SLinus Torvalds raw6_proc_exit(); 9721da177e4SLinus Torvalds proc_raw6_fail: 9731da177e4SLinus Torvalds #endif 9742cc7d573SHarald Welte ipv6_netfilter_fini(); 9752cc7d573SHarald Welte netfilter_fail: 9761da177e4SLinus Torvalds igmp6_cleanup(); 9771da177e4SLinus Torvalds igmp_fail: 9781da177e4SLinus Torvalds ndisc_cleanup(); 9791da177e4SLinus Torvalds ndisc_fail: 980623d1a1aSWang Chen ip6_mr_cleanup(); 981623d1a1aSWang Chen ipmr_fail: 9821da177e4SLinus Torvalds icmpv6_cleanup(); 9831da177e4SLinus Torvalds icmp_fail: 98481c1c178SDaniel Lezcano unregister_pernet_subsys(&inet6_net_ops); 98581c1c178SDaniel Lezcano register_pernet_fail: 9868eb55910SDavid S. Miller sock_unregister(PF_INET6); 987e2fddf5eSDaniel Lezcano rtnl_unregister_all(PF_INET6); 9887f4e4868SDaniel Lezcano out_sock_register_fail: 9897f4e4868SDaniel Lezcano rawv6_exit(); 9901da177e4SLinus Torvalds out_unregister_raw_proto: 9911da177e4SLinus Torvalds proto_unregister(&rawv6_prot); 992ba4e58ecSGerrit Renker out_unregister_udplite_proto: 993ba4e58ecSGerrit Renker proto_unregister(&udplitev6_prot); 9941da177e4SLinus Torvalds out_unregister_udp_proto: 9951da177e4SLinus Torvalds proto_unregister(&udpv6_prot); 9961da177e4SLinus Torvalds out_unregister_tcp_proto: 9971da177e4SLinus Torvalds proto_unregister(&tcpv6_prot); 9981da177e4SLinus Torvalds goto out; 9991da177e4SLinus Torvalds } 10001da177e4SLinus Torvalds module_init(inet6_init); 10011da177e4SLinus Torvalds 10021da177e4SLinus Torvalds static void __exit inet6_exit(void) 10031da177e4SLinus Torvalds { 100456d417b1SBrian Haley if (disable_ipv6_mod) 1005ff8cf9a9SJohn Dykstra return; 1006ff8cf9a9SJohn Dykstra 10071da177e4SLinus Torvalds /* First of all disallow new sockets creation. */ 10081da177e4SLinus Torvalds sock_unregister(PF_INET6); 1009c127ea2cSThomas Graf /* Disallow any further netlink messages */ 1010c127ea2cSThomas Graf rtnl_unregister_all(PF_INET6); 1011ca17c233SJoe Jin 10127f4e4868SDaniel Lezcano udpv6_exit(); 10137f4e4868SDaniel Lezcano udplitev6_exit(); 10147f4e4868SDaniel Lezcano tcpv6_exit(); 10157f4e4868SDaniel Lezcano 1016ca17c233SJoe Jin /* Cleanup code parts. */ 1017ca17c233SJoe Jin ipv6_packet_cleanup(); 1018853cbbaaSDaniel Lezcano ipv6_frag_exit(); 1019248b238dSDaniel Lezcano ipv6_exthdrs_exit(); 10201da177e4SLinus Torvalds addrconf_cleanup(); 1021ca17c233SJoe Jin ip6_flowlabel_cleanup(); 10221da177e4SLinus Torvalds ip6_route_cleanup(); 1023ca17c233SJoe Jin #ifdef CONFIG_PROC_FS 1024ca17c233SJoe Jin 1025ca17c233SJoe Jin /* Cleanup code parts. */ 1026ca17c233SJoe Jin if6_proc_exit(); 1027ca17c233SJoe Jin ipv6_misc_proc_exit(); 1028ca17c233SJoe Jin udplite6_proc_exit(); 1029ca17c233SJoe Jin raw6_proc_exit(); 1030ca17c233SJoe Jin #endif 10312cc7d573SHarald Welte ipv6_netfilter_fini(); 1032ca17c233SJoe Jin igmp6_cleanup(); 10331da177e4SLinus Torvalds ndisc_cleanup(); 1034623d1a1aSWang Chen ip6_mr_cleanup(); 10351da177e4SLinus Torvalds icmpv6_cleanup(); 10367f4e4868SDaniel Lezcano rawv6_exit(); 103794911fe3SBenjamin Thery 103881c1c178SDaniel Lezcano unregister_pernet_subsys(&inet6_net_ops); 10391da177e4SLinus Torvalds proto_unregister(&rawv6_prot); 1040ca17c233SJoe Jin proto_unregister(&udplitev6_prot); 10411da177e4SLinus Torvalds proto_unregister(&udpv6_prot); 10421da177e4SLinus Torvalds proto_unregister(&tcpv6_prot); 10431f2ccd00SJesper Dangaard Brouer 10441f2ccd00SJesper Dangaard Brouer rcu_barrier(); /* Wait for completion of call_rcu()'s */ 10451da177e4SLinus Torvalds } 10461da177e4SLinus Torvalds module_exit(inet6_exit); 10471da177e4SLinus Torvalds 10481da177e4SLinus Torvalds MODULE_ALIAS_NETPROTO(PF_INET6); 1049