11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * INET An implementation of the TCP/IP protocol suite for the LINUX 31da177e4SLinus Torvalds * operating system. INET is implemented using the BSD Socket 41da177e4SLinus Torvalds * interface as the means of communication with the user level. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * PF_INET protocol family socket handler. 71da177e4SLinus Torvalds * 802c30a84SJesper Juhl * Authors: Ross Biro 91da177e4SLinus Torvalds * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 101da177e4SLinus Torvalds * Florian La Roche, <flla@stud.uni-sb.de> 111da177e4SLinus Torvalds * Alan Cox, <A.Cox@swansea.ac.uk> 121da177e4SLinus Torvalds * 131da177e4SLinus Torvalds * Changes (see also sock.c) 141da177e4SLinus Torvalds * 151da177e4SLinus Torvalds * piggy, 161da177e4SLinus Torvalds * Karl Knutson : Socket protocol table 171da177e4SLinus Torvalds * A.N.Kuznetsov : Socket death error in accept(). 181da177e4SLinus Torvalds * John Richardson : Fix non blocking error in connect() 191da177e4SLinus Torvalds * so sockets that fail to connect 201da177e4SLinus Torvalds * don't return -EINPROGRESS. 211da177e4SLinus Torvalds * Alan Cox : Asynchronous I/O support 221da177e4SLinus Torvalds * Alan Cox : Keep correct socket pointer on sock 231da177e4SLinus Torvalds * structures 241da177e4SLinus Torvalds * when accept() ed 251da177e4SLinus Torvalds * Alan Cox : Semantics of SO_LINGER aren't state 261da177e4SLinus Torvalds * moved to close when you look carefully. 271da177e4SLinus Torvalds * With this fixed and the accept bug fixed 281da177e4SLinus Torvalds * some RPC stuff seems happier. 291da177e4SLinus Torvalds * Niibe Yutaka : 4.4BSD style write async I/O 301da177e4SLinus Torvalds * Alan Cox, 311da177e4SLinus Torvalds * Tony Gale : Fixed reuse semantics. 321da177e4SLinus Torvalds * Alan Cox : bind() shouldn't abort existing but dead 331da177e4SLinus Torvalds * sockets. Stops FTP netin:.. I hope. 341da177e4SLinus Torvalds * Alan Cox : bind() works correctly for RAW sockets. 351da177e4SLinus Torvalds * Note that FreeBSD at least was broken 361da177e4SLinus Torvalds * in this respect so be careful with 371da177e4SLinus Torvalds * compatibility tests... 381da177e4SLinus Torvalds * Alan Cox : routing cache support 391da177e4SLinus Torvalds * Alan Cox : memzero the socket structure for 401da177e4SLinus Torvalds * compactness. 411da177e4SLinus Torvalds * Matt Day : nonblock connect error handler 421da177e4SLinus Torvalds * Alan Cox : Allow large numbers of pending sockets 431da177e4SLinus Torvalds * (eg for big web sites), but only if 441da177e4SLinus Torvalds * specifically application requested. 451da177e4SLinus Torvalds * Alan Cox : New buffering throughout IP. Used 461da177e4SLinus Torvalds * dumbly. 471da177e4SLinus Torvalds * Alan Cox : New buffering now used smartly. 481da177e4SLinus Torvalds * Alan Cox : BSD rather than common sense 491da177e4SLinus Torvalds * interpretation of listen. 501da177e4SLinus Torvalds * Germano Caronni : Assorted small races. 511da177e4SLinus Torvalds * Alan Cox : sendmsg/recvmsg basic support. 521da177e4SLinus Torvalds * Alan Cox : Only sendmsg/recvmsg now supported. 531da177e4SLinus Torvalds * Alan Cox : Locked down bind (see security list). 541da177e4SLinus Torvalds * Alan Cox : Loosened bind a little. 551da177e4SLinus Torvalds * Mike McLagan : ADD/DEL DLCI Ioctls 561da177e4SLinus Torvalds * Willy Konynenberg : Transparent proxying support. 571da177e4SLinus Torvalds * David S. Miller : New socket lookup architecture. 581da177e4SLinus Torvalds * Some other random speedups. 591da177e4SLinus Torvalds * Cyrus Durgin : Cleaned up file for kmod hacks. 601da177e4SLinus Torvalds * Andi Kleen : Fix inet_stream_connect TCP race. 611da177e4SLinus Torvalds * 621da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 631da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 641da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 651da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 661da177e4SLinus Torvalds */ 671da177e4SLinus Torvalds 68afd46503SJoe Perches #define pr_fmt(fmt) "IPv4: " fmt 69afd46503SJoe Perches 70f4c50d99SHerbert Xu #include <linux/err.h> 711da177e4SLinus Torvalds #include <linux/errno.h> 721da177e4SLinus Torvalds #include <linux/types.h> 731da177e4SLinus Torvalds #include <linux/socket.h> 741da177e4SLinus Torvalds #include <linux/in.h> 751da177e4SLinus Torvalds #include <linux/kernel.h> 761da177e4SLinus Torvalds #include <linux/module.h> 771da177e4SLinus Torvalds #include <linux/sched.h> 781da177e4SLinus Torvalds #include <linux/timer.h> 791da177e4SLinus Torvalds #include <linux/string.h> 801da177e4SLinus Torvalds #include <linux/sockios.h> 811da177e4SLinus Torvalds #include <linux/net.h> 824fc268d2SRandy Dunlap #include <linux/capability.h> 831da177e4SLinus Torvalds #include <linux/fcntl.h> 841da177e4SLinus Torvalds #include <linux/mm.h> 851da177e4SLinus Torvalds #include <linux/interrupt.h> 861da177e4SLinus Torvalds #include <linux/stat.h> 871da177e4SLinus Torvalds #include <linux/init.h> 881da177e4SLinus Torvalds #include <linux/poll.h> 891da177e4SLinus Torvalds #include <linux/netfilter_ipv4.h> 90b3da2cf3SDavid S. Miller #include <linux/random.h> 915a0e3ad6STejun Heo #include <linux/slab.h> 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds #include <asm/uaccess.h> 941da177e4SLinus Torvalds 951da177e4SLinus Torvalds #include <linux/inet.h> 961da177e4SLinus Torvalds #include <linux/igmp.h> 9714c85021SArnaldo Carvalho de Melo #include <linux/inetdevice.h> 981da177e4SLinus Torvalds #include <linux/netdevice.h> 9973cc19f1SHerbert Xu #include <net/checksum.h> 1001da177e4SLinus Torvalds #include <net/ip.h> 1011da177e4SLinus Torvalds #include <net/protocol.h> 1021da177e4SLinus Torvalds #include <net/arp.h> 1031da177e4SLinus Torvalds #include <net/route.h> 1041da177e4SLinus Torvalds #include <net/ip_fib.h> 105295f7324SArnaldo Carvalho de Melo #include <net/inet_connection_sock.h> 1061da177e4SLinus Torvalds #include <net/tcp.h> 1071da177e4SLinus Torvalds #include <net/udp.h> 108ba4e58ecSGerrit Renker #include <net/udplite.h> 109c319b4d7SVasiliy Kulikov #include <net/ping.h> 1101da177e4SLinus Torvalds #include <linux/skbuff.h> 1111da177e4SLinus Torvalds #include <net/sock.h> 1121da177e4SLinus Torvalds #include <net/raw.h> 1131da177e4SLinus Torvalds #include <net/icmp.h> 1141da177e4SLinus Torvalds #include <net/inet_common.h> 1151da177e4SLinus Torvalds #include <net/xfrm.h> 1169b4661bdSPavel Emelyanov #include <net/net_namespace.h> 117aebda156SEric Dumazet #include <net/secure_seq.h> 1181da177e4SLinus Torvalds #ifdef CONFIG_IP_MROUTE 1191da177e4SLinus Torvalds #include <linux/mroute.h> 1201da177e4SLinus Torvalds #endif 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds /* The inetsw table contains everything that inet_create needs to 1241da177e4SLinus Torvalds * build a new socket. 1251da177e4SLinus Torvalds */ 1261da177e4SLinus Torvalds static struct list_head inetsw[SOCK_MAX]; 1271da177e4SLinus Torvalds static DEFINE_SPINLOCK(inetsw_lock); 1281da177e4SLinus Torvalds 1299ba63979SPavel Emelyanov struct ipv4_config ipv4_config; 1309ba63979SPavel Emelyanov EXPORT_SYMBOL(ipv4_config); 1319ba63979SPavel Emelyanov 1321da177e4SLinus Torvalds /* New destruction routine */ 1331da177e4SLinus Torvalds 1341da177e4SLinus Torvalds void inet_sock_destruct(struct sock *sk) 1351da177e4SLinus Torvalds { 1361da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 1371da177e4SLinus Torvalds 1381da177e4SLinus Torvalds __skb_queue_purge(&sk->sk_receive_queue); 1391da177e4SLinus Torvalds __skb_queue_purge(&sk->sk_error_queue); 1401da177e4SLinus Torvalds 14195766fffSHideo Aoki sk_mem_reclaim(sk); 14295766fffSHideo Aoki 1431da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM && sk->sk_state != TCP_CLOSE) { 1443d1427f8SEric Dumazet pr_err("Attempt to release TCP socket in state %d %p\n", 1451da177e4SLinus Torvalds sk->sk_state, sk); 1461da177e4SLinus Torvalds return; 1471da177e4SLinus Torvalds } 1481da177e4SLinus Torvalds if (!sock_flag(sk, SOCK_DEAD)) { 1493d1427f8SEric Dumazet pr_err("Attempt to release alive inet socket %p\n", sk); 1501da177e4SLinus Torvalds return; 1511da177e4SLinus Torvalds } 1521da177e4SLinus Torvalds 153547b792cSIlpo Järvinen WARN_ON(atomic_read(&sk->sk_rmem_alloc)); 154547b792cSIlpo Järvinen WARN_ON(atomic_read(&sk->sk_wmem_alloc)); 155547b792cSIlpo Järvinen WARN_ON(sk->sk_wmem_queued); 156547b792cSIlpo Järvinen WARN_ON(sk->sk_forward_alloc); 1571da177e4SLinus Torvalds 158f6d8bd05SEric Dumazet kfree(rcu_dereference_protected(inet->inet_opt, 1)); 159b6c6712aSEric Dumazet dst_release(rcu_dereference_check(sk->sk_dst_cache, 1)); 16041063e9dSDavid S. Miller dst_release(sk->sk_rx_dst); 161e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_dec(sk); 1621da177e4SLinus Torvalds } 1633d1427f8SEric Dumazet EXPORT_SYMBOL(inet_sock_destruct); 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds /* 1661da177e4SLinus Torvalds * The routines beyond this point handle the behaviour of an AF_INET 1671da177e4SLinus Torvalds * socket object. Mostly it punts to the subprotocols of IP to do 1681da177e4SLinus Torvalds * the work. 1691da177e4SLinus Torvalds */ 1701da177e4SLinus Torvalds 1711da177e4SLinus Torvalds /* 1721da177e4SLinus Torvalds * Automatically bind an unbound socket. 1731da177e4SLinus Torvalds */ 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds static int inet_autobind(struct sock *sk) 1761da177e4SLinus Torvalds { 1771da177e4SLinus Torvalds struct inet_sock *inet; 1781da177e4SLinus Torvalds /* We may need to bind the socket. */ 1791da177e4SLinus Torvalds lock_sock(sk); 1801da177e4SLinus Torvalds inet = inet_sk(sk); 181c720c7e8SEric Dumazet if (!inet->inet_num) { 1821da177e4SLinus Torvalds if (sk->sk_prot->get_port(sk, 0)) { 1831da177e4SLinus Torvalds release_sock(sk); 1841da177e4SLinus Torvalds return -EAGAIN; 1851da177e4SLinus Torvalds } 186c720c7e8SEric Dumazet inet->inet_sport = htons(inet->inet_num); 1871da177e4SLinus Torvalds } 1881da177e4SLinus Torvalds release_sock(sk); 1891da177e4SLinus Torvalds return 0; 1901da177e4SLinus Torvalds } 1911da177e4SLinus Torvalds 1921da177e4SLinus Torvalds /* 1931da177e4SLinus Torvalds * Move a socket into listening state. 1941da177e4SLinus Torvalds */ 1951da177e4SLinus Torvalds int inet_listen(struct socket *sock, int backlog) 1961da177e4SLinus Torvalds { 1971da177e4SLinus Torvalds struct sock *sk = sock->sk; 1981da177e4SLinus Torvalds unsigned char old_state; 1991da177e4SLinus Torvalds int err; 2001da177e4SLinus Torvalds 2011da177e4SLinus Torvalds lock_sock(sk); 2021da177e4SLinus Torvalds 2031da177e4SLinus Torvalds err = -EINVAL; 2041da177e4SLinus Torvalds if (sock->state != SS_UNCONNECTED || sock->type != SOCK_STREAM) 2051da177e4SLinus Torvalds goto out; 2061da177e4SLinus Torvalds 2071da177e4SLinus Torvalds old_state = sk->sk_state; 2081da177e4SLinus Torvalds if (!((1 << old_state) & (TCPF_CLOSE | TCPF_LISTEN))) 2091da177e4SLinus Torvalds goto out; 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds /* Really, if the socket is already in listen state 2121da177e4SLinus Torvalds * we can only allow the backlog to be adjusted. 2131da177e4SLinus Torvalds */ 2141da177e4SLinus Torvalds if (old_state != TCP_LISTEN) { 2158336886fSJerry Chu /* Check special setups for testing purpose to enable TFO w/o 2168336886fSJerry Chu * requiring TCP_FASTOPEN sockopt. 2178336886fSJerry Chu * Note that only TCP sockets (SOCK_STREAM) will reach here. 2188336886fSJerry Chu * Also fastopenq may already been allocated because this 2198336886fSJerry Chu * socket was in TCP_LISTEN state previously but was 2208336886fSJerry Chu * shutdown() (rather than close()). 2218336886fSJerry Chu */ 2228336886fSJerry Chu if ((sysctl_tcp_fastopen & TFO_SERVER_ENABLE) != 0 && 2238336886fSJerry Chu inet_csk(sk)->icsk_accept_queue.fastopenq == NULL) { 2248336886fSJerry Chu if ((sysctl_tcp_fastopen & TFO_SERVER_WO_SOCKOPT1) != 0) 2258336886fSJerry Chu err = fastopen_init_queue(sk, backlog); 2268336886fSJerry Chu else if ((sysctl_tcp_fastopen & 2278336886fSJerry Chu TFO_SERVER_WO_SOCKOPT2) != 0) 2288336886fSJerry Chu err = fastopen_init_queue(sk, 2298336886fSJerry Chu ((uint)sysctl_tcp_fastopen) >> 16); 2308336886fSJerry Chu else 2318336886fSJerry Chu err = 0; 2328336886fSJerry Chu if (err) 2338336886fSJerry Chu goto out; 2348336886fSJerry Chu } 23572a3effaSEric Dumazet err = inet_csk_listen_start(sk, backlog); 2361da177e4SLinus Torvalds if (err) 2371da177e4SLinus Torvalds goto out; 2381da177e4SLinus Torvalds } 2391da177e4SLinus Torvalds sk->sk_max_ack_backlog = backlog; 2401da177e4SLinus Torvalds err = 0; 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds out: 2431da177e4SLinus Torvalds release_sock(sk); 2441da177e4SLinus Torvalds return err; 2451da177e4SLinus Torvalds } 2463d1427f8SEric Dumazet EXPORT_SYMBOL(inet_listen); 2471da177e4SLinus Torvalds 248be776281SEric Dumazet u32 inet_ehash_secret __read_mostly; 249b3da2cf3SDavid S. Miller EXPORT_SYMBOL(inet_ehash_secret); 250b3da2cf3SDavid S. Miller 25108dcdbf6SEric Dumazet u32 ipv6_hash_secret __read_mostly; 25208dcdbf6SEric Dumazet EXPORT_SYMBOL(ipv6_hash_secret); 25308dcdbf6SEric Dumazet 254be776281SEric Dumazet /* 25508dcdbf6SEric Dumazet * inet_ehash_secret must be set exactly once, and to a non nul value 25608dcdbf6SEric Dumazet * ipv6_hash_secret must be set exactly once. 257be776281SEric Dumazet */ 258b3da2cf3SDavid S. Miller void build_ehash_secret(void) 259b3da2cf3SDavid S. Miller { 260be776281SEric Dumazet u32 rnd; 26149e8ab03SEric Dumazet 262be776281SEric Dumazet do { 263be776281SEric Dumazet get_random_bytes(&rnd, sizeof(rnd)); 264be776281SEric Dumazet } while (rnd == 0); 26549e8ab03SEric Dumazet 2669a3bab6bSEric Dumazet if (cmpxchg(&inet_ehash_secret, 0, rnd) == 0) 26708dcdbf6SEric Dumazet get_random_bytes(&ipv6_hash_secret, sizeof(ipv6_hash_secret)); 268b3da2cf3SDavid S. Miller } 269b3da2cf3SDavid S. Miller EXPORT_SYMBOL(build_ehash_secret); 270b3da2cf3SDavid S. Miller 2711da177e4SLinus Torvalds /* 2721da177e4SLinus Torvalds * Create an inet socket. 2731da177e4SLinus Torvalds */ 2741da177e4SLinus Torvalds 2753f378b68SEric Paris static int inet_create(struct net *net, struct socket *sock, int protocol, 2763f378b68SEric Paris int kern) 2771da177e4SLinus Torvalds { 2781da177e4SLinus Torvalds struct sock *sk; 2791da177e4SLinus Torvalds struct inet_protosw *answer; 2801da177e4SLinus Torvalds struct inet_sock *inet; 2811da177e4SLinus Torvalds struct proto *answer_prot; 2821da177e4SLinus Torvalds unsigned char answer_flags; 2831da177e4SLinus Torvalds char answer_no_check; 284bb97d31fSArnaldo Carvalho de Melo int try_loading_module = 0; 28586c8f9d1SHerbert Xu int err; 2861da177e4SLinus Torvalds 28704f258ceSEric Dumazet if (unlikely(!inet_ehash_secret)) 28804f258ceSEric Dumazet if (sock->type != SOCK_RAW && sock->type != SOCK_DGRAM) 289b3da2cf3SDavid S. Miller build_ehash_secret(); 290b3da2cf3SDavid S. Miller 2911da177e4SLinus Torvalds sock->state = SS_UNCONNECTED; 2921da177e4SLinus Torvalds 2931da177e4SLinus Torvalds /* Look for the requested type/protocol pair. */ 294bb97d31fSArnaldo Carvalho de Melo lookup_protocol: 29586c8f9d1SHerbert Xu err = -ESOCKTNOSUPPORT; 2961da177e4SLinus Torvalds rcu_read_lock(); 297696adfe8SPaul E. McKenney list_for_each_entry_rcu(answer, &inetsw[sock->type], list) { 2981da177e4SLinus Torvalds 299696adfe8SPaul E. McKenney err = 0; 3001da177e4SLinus Torvalds /* Check the non-wild match. */ 3011da177e4SLinus Torvalds if (protocol == answer->protocol) { 3021da177e4SLinus Torvalds if (protocol != IPPROTO_IP) 3031da177e4SLinus Torvalds break; 3041da177e4SLinus Torvalds } else { 3051da177e4SLinus Torvalds /* Check for the two wild cases. */ 3061da177e4SLinus Torvalds if (IPPROTO_IP == protocol) { 3071da177e4SLinus Torvalds protocol = answer->protocol; 3081da177e4SLinus Torvalds break; 3091da177e4SLinus Torvalds } 3101da177e4SLinus Torvalds if (IPPROTO_IP == answer->protocol) 3111da177e4SLinus Torvalds break; 3121da177e4SLinus Torvalds } 31386c8f9d1SHerbert Xu err = -EPROTONOSUPPORT; 3141da177e4SLinus Torvalds } 3151da177e4SLinus Torvalds 316696adfe8SPaul E. McKenney if (unlikely(err)) { 317bb97d31fSArnaldo Carvalho de Melo if (try_loading_module < 2) { 318bb97d31fSArnaldo Carvalho de Melo rcu_read_unlock(); 319bb97d31fSArnaldo Carvalho de Melo /* 320bb97d31fSArnaldo Carvalho de Melo * Be more specific, e.g. net-pf-2-proto-132-type-1 321bb97d31fSArnaldo Carvalho de Melo * (net-pf-PF_INET-proto-IPPROTO_SCTP-type-SOCK_STREAM) 322bb97d31fSArnaldo Carvalho de Melo */ 323bb97d31fSArnaldo Carvalho de Melo if (++try_loading_module == 1) 324bb97d31fSArnaldo Carvalho de Melo request_module("net-pf-%d-proto-%d-type-%d", 325bb97d31fSArnaldo Carvalho de Melo PF_INET, protocol, sock->type); 326bb97d31fSArnaldo Carvalho de Melo /* 327bb97d31fSArnaldo Carvalho de Melo * Fall back to generic, e.g. net-pf-2-proto-132 328bb97d31fSArnaldo Carvalho de Melo * (net-pf-PF_INET-proto-IPPROTO_SCTP) 329bb97d31fSArnaldo Carvalho de Melo */ 330bb97d31fSArnaldo Carvalho de Melo else 331bb97d31fSArnaldo Carvalho de Melo request_module("net-pf-%d-proto-%d", 332bb97d31fSArnaldo Carvalho de Melo PF_INET, protocol); 333bb97d31fSArnaldo Carvalho de Melo goto lookup_protocol; 334bb97d31fSArnaldo Carvalho de Melo } else 3351da177e4SLinus Torvalds goto out_rcu_unlock; 336bb97d31fSArnaldo Carvalho de Melo } 337bb97d31fSArnaldo Carvalho de Melo 3381da177e4SLinus Torvalds err = -EPERM; 33952e804c6SEric W. Biederman if (sock->type == SOCK_RAW && !kern && 34052e804c6SEric W. Biederman !ns_capable(net->user_ns, CAP_NET_RAW)) 3411da177e4SLinus Torvalds goto out_rcu_unlock; 3421da177e4SLinus Torvalds 3431da177e4SLinus Torvalds sock->ops = answer->ops; 3441da177e4SLinus Torvalds answer_prot = answer->prot; 3451da177e4SLinus Torvalds answer_no_check = answer->no_check; 3461da177e4SLinus Torvalds answer_flags = answer->flags; 3471da177e4SLinus Torvalds rcu_read_unlock(); 3481da177e4SLinus Torvalds 349547b792cSIlpo Järvinen WARN_ON(answer_prot->slab == NULL); 3501da177e4SLinus Torvalds 3511da177e4SLinus Torvalds err = -ENOBUFS; 3526257ff21SPavel Emelyanov sk = sk_alloc(net, PF_INET, GFP_KERNEL, answer_prot); 3531da177e4SLinus Torvalds if (sk == NULL) 3541da177e4SLinus Torvalds goto out; 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds err = 0; 3571da177e4SLinus Torvalds sk->sk_no_check = answer_no_check; 3581da177e4SLinus Torvalds if (INET_PROTOSW_REUSE & answer_flags) 3594a17fd52SPavel Emelyanov sk->sk_reuse = SK_CAN_REUSE; 3601da177e4SLinus Torvalds 3611da177e4SLinus Torvalds inet = inet_sk(sk); 362469de9b9SPaul Moore inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0; 3631da177e4SLinus Torvalds 3647b2ff18eSJiri Olsa inet->nodefrag = 0; 3657b2ff18eSJiri Olsa 3661da177e4SLinus Torvalds if (SOCK_RAW == sock->type) { 367c720c7e8SEric Dumazet inet->inet_num = protocol; 3681da177e4SLinus Torvalds if (IPPROTO_RAW == protocol) 3691da177e4SLinus Torvalds inet->hdrincl = 1; 3701da177e4SLinus Torvalds } 3711da177e4SLinus Torvalds 3721da177e4SLinus Torvalds if (ipv4_config.no_pmtu_disc) 3731da177e4SLinus Torvalds inet->pmtudisc = IP_PMTUDISC_DONT; 3741da177e4SLinus Torvalds else 3751da177e4SLinus Torvalds inet->pmtudisc = IP_PMTUDISC_WANT; 3761da177e4SLinus Torvalds 377c720c7e8SEric Dumazet inet->inet_id = 0; 3781da177e4SLinus Torvalds 3791da177e4SLinus Torvalds sock_init_data(sock, sk); 3801da177e4SLinus Torvalds 3811da177e4SLinus Torvalds sk->sk_destruct = inet_sock_destruct; 3821da177e4SLinus Torvalds sk->sk_protocol = protocol; 3831da177e4SLinus Torvalds sk->sk_backlog_rcv = sk->sk_prot->backlog_rcv; 3841da177e4SLinus Torvalds 3851da177e4SLinus Torvalds inet->uc_ttl = -1; 3861da177e4SLinus Torvalds inet->mc_loop = 1; 3871da177e4SLinus Torvalds inet->mc_ttl = 1; 388f771bef9SNivedita Singhvi inet->mc_all = 1; 3891da177e4SLinus Torvalds inet->mc_index = 0; 3901da177e4SLinus Torvalds inet->mc_list = NULL; 3914c507d28SJiri Benc inet->rcv_tos = 0; 3921da177e4SLinus Torvalds 393e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_inc(sk); 3941da177e4SLinus Torvalds 395c720c7e8SEric Dumazet if (inet->inet_num) { 3961da177e4SLinus Torvalds /* It assumes that any protocol which allows 3971da177e4SLinus Torvalds * the user to assign a number at socket 3981da177e4SLinus Torvalds * creation time automatically 3991da177e4SLinus Torvalds * shares. 4001da177e4SLinus Torvalds */ 401c720c7e8SEric Dumazet inet->inet_sport = htons(inet->inet_num); 4021da177e4SLinus Torvalds /* Add to protocol hash chains. */ 4031da177e4SLinus Torvalds sk->sk_prot->hash(sk); 4041da177e4SLinus Torvalds } 4051da177e4SLinus Torvalds 4061da177e4SLinus Torvalds if (sk->sk_prot->init) { 4071da177e4SLinus Torvalds err = sk->sk_prot->init(sk); 4081da177e4SLinus Torvalds if (err) 4091da177e4SLinus Torvalds sk_common_release(sk); 4101da177e4SLinus Torvalds } 4111da177e4SLinus Torvalds out: 4121da177e4SLinus Torvalds return err; 4131da177e4SLinus Torvalds out_rcu_unlock: 4141da177e4SLinus Torvalds rcu_read_unlock(); 4151da177e4SLinus Torvalds goto out; 4161da177e4SLinus Torvalds } 4171da177e4SLinus Torvalds 4181da177e4SLinus Torvalds 4191da177e4SLinus Torvalds /* 4201da177e4SLinus Torvalds * The peer socket should always be NULL (or else). When we call this 4211da177e4SLinus Torvalds * function we are destroying the object and from then on nobody 4221da177e4SLinus Torvalds * should refer to it. 4231da177e4SLinus Torvalds */ 4241da177e4SLinus Torvalds int inet_release(struct socket *sock) 4251da177e4SLinus Torvalds { 4261da177e4SLinus Torvalds struct sock *sk = sock->sk; 4271da177e4SLinus Torvalds 4281da177e4SLinus Torvalds if (sk) { 4291da177e4SLinus Torvalds long timeout; 4301da177e4SLinus Torvalds 431c58dc01bSDavid S. Miller sock_rps_reset_flow(sk); 432fec5e652STom Herbert 4331da177e4SLinus Torvalds /* Applications forget to leave groups before exiting */ 4341da177e4SLinus Torvalds ip_mc_drop_socket(sk); 4351da177e4SLinus Torvalds 4361da177e4SLinus Torvalds /* If linger is set, we don't return until the close 4371da177e4SLinus Torvalds * is complete. Otherwise we return immediately. The 4381da177e4SLinus Torvalds * actually closing is done the same either way. 4391da177e4SLinus Torvalds * 4401da177e4SLinus Torvalds * If the close is due to the process exiting, we never 4411da177e4SLinus Torvalds * linger.. 4421da177e4SLinus Torvalds */ 4431da177e4SLinus Torvalds timeout = 0; 4441da177e4SLinus Torvalds if (sock_flag(sk, SOCK_LINGER) && 4451da177e4SLinus Torvalds !(current->flags & PF_EXITING)) 4461da177e4SLinus Torvalds timeout = sk->sk_lingertime; 4471da177e4SLinus Torvalds sock->sk = NULL; 4481da177e4SLinus Torvalds sk->sk_prot->close(sk, timeout); 4491da177e4SLinus Torvalds } 4501da177e4SLinus Torvalds return 0; 4511da177e4SLinus Torvalds } 4523d1427f8SEric Dumazet EXPORT_SYMBOL(inet_release); 4531da177e4SLinus Torvalds 4541da177e4SLinus Torvalds /* It is off by default, see below. */ 455ab32ea5dSBrian Haley int sysctl_ip_nonlocal_bind __read_mostly; 4563d1427f8SEric Dumazet EXPORT_SYMBOL(sysctl_ip_nonlocal_bind); 4571da177e4SLinus Torvalds 4581da177e4SLinus Torvalds int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) 4591da177e4SLinus Torvalds { 4601da177e4SLinus Torvalds struct sockaddr_in *addr = (struct sockaddr_in *)uaddr; 4611da177e4SLinus Torvalds struct sock *sk = sock->sk; 4621da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 4633594698aSEric W. Biederman struct net *net = sock_net(sk); 4641da177e4SLinus Torvalds unsigned short snum; 4651da177e4SLinus Torvalds int chk_addr_ret; 4661da177e4SLinus Torvalds int err; 4671da177e4SLinus Torvalds 4681da177e4SLinus Torvalds /* If the socket has its own bind function then use it. (RAW) */ 4691da177e4SLinus Torvalds if (sk->sk_prot->bind) { 4701da177e4SLinus Torvalds err = sk->sk_prot->bind(sk, uaddr, addr_len); 4711da177e4SLinus Torvalds goto out; 4721da177e4SLinus Torvalds } 4731da177e4SLinus Torvalds err = -EINVAL; 4741da177e4SLinus Torvalds if (addr_len < sizeof(struct sockaddr_in)) 4751da177e4SLinus Torvalds goto out; 4761da177e4SLinus Torvalds 477c349a528SMarcus Meissner if (addr->sin_family != AF_INET) { 47829c486dfSEric Dumazet /* Compatibility games : accept AF_UNSPEC (mapped to AF_INET) 47929c486dfSEric Dumazet * only if s_addr is INADDR_ANY. 48029c486dfSEric Dumazet */ 481c349a528SMarcus Meissner err = -EAFNOSUPPORT; 48229c486dfSEric Dumazet if (addr->sin_family != AF_UNSPEC || 48329c486dfSEric Dumazet addr->sin_addr.s_addr != htonl(INADDR_ANY)) 484d0733d2eSMarcus Meissner goto out; 485c349a528SMarcus Meissner } 486d0733d2eSMarcus Meissner 4873594698aSEric W. Biederman chk_addr_ret = inet_addr_type(net, addr->sin_addr.s_addr); 4881da177e4SLinus Torvalds 4891da177e4SLinus Torvalds /* Not specified by any standard per-se, however it breaks too 4901da177e4SLinus Torvalds * many applications when removed. It is unfortunate since 4911da177e4SLinus Torvalds * allowing applications to make a non-local bind solves 4921da177e4SLinus Torvalds * several problems with systems using dynamic addressing. 4931da177e4SLinus Torvalds * (ie. your servers still start up even if your ISDN link 4941da177e4SLinus Torvalds * is temporarily down) 4951da177e4SLinus Torvalds */ 4961da177e4SLinus Torvalds err = -EADDRNOTAVAIL; 4971da177e4SLinus Torvalds if (!sysctl_ip_nonlocal_bind && 498b9fb1506STóth László Attila !(inet->freebind || inet->transparent) && 499e6f1cebfSAl Viro addr->sin_addr.s_addr != htonl(INADDR_ANY) && 5001da177e4SLinus Torvalds chk_addr_ret != RTN_LOCAL && 5011da177e4SLinus Torvalds chk_addr_ret != RTN_MULTICAST && 5021da177e4SLinus Torvalds chk_addr_ret != RTN_BROADCAST) 5031da177e4SLinus Torvalds goto out; 5041da177e4SLinus Torvalds 5051da177e4SLinus Torvalds snum = ntohs(addr->sin_port); 5061da177e4SLinus Torvalds err = -EACCES; 5073594698aSEric W. Biederman if (snum && snum < PROT_SOCK && 5083594698aSEric W. Biederman !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) 5091da177e4SLinus Torvalds goto out; 5101da177e4SLinus Torvalds 5111da177e4SLinus Torvalds /* We keep a pair of addresses. rcv_saddr is the one 5121da177e4SLinus Torvalds * used by hash lookups, and saddr is used for transmit. 5131da177e4SLinus Torvalds * 5141da177e4SLinus Torvalds * In the BSD API these are the same except where it 5151da177e4SLinus Torvalds * would be illegal to use them (multicast/broadcast) in 5161da177e4SLinus Torvalds * which case the sending device address is used. 5171da177e4SLinus Torvalds */ 5181da177e4SLinus Torvalds lock_sock(sk); 5191da177e4SLinus Torvalds 5201da177e4SLinus Torvalds /* Check these errors (active socket, double bind). */ 5211da177e4SLinus Torvalds err = -EINVAL; 522c720c7e8SEric Dumazet if (sk->sk_state != TCP_CLOSE || inet->inet_num) 5231da177e4SLinus Torvalds goto out_release_sock; 5241da177e4SLinus Torvalds 525c720c7e8SEric Dumazet inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr; 5261da177e4SLinus Torvalds if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST) 527c720c7e8SEric Dumazet inet->inet_saddr = 0; /* Use device */ 5281da177e4SLinus Torvalds 5291da177e4SLinus Torvalds /* Make sure we are allowed to bind here. */ 5301da177e4SLinus Torvalds if (sk->sk_prot->get_port(sk, snum)) { 531c720c7e8SEric Dumazet inet->inet_saddr = inet->inet_rcv_saddr = 0; 5321da177e4SLinus Torvalds err = -EADDRINUSE; 5331da177e4SLinus Torvalds goto out_release_sock; 5341da177e4SLinus Torvalds } 5351da177e4SLinus Torvalds 536c720c7e8SEric Dumazet if (inet->inet_rcv_saddr) 5371da177e4SLinus Torvalds sk->sk_userlocks |= SOCK_BINDADDR_LOCK; 5381da177e4SLinus Torvalds if (snum) 5391da177e4SLinus Torvalds sk->sk_userlocks |= SOCK_BINDPORT_LOCK; 540c720c7e8SEric Dumazet inet->inet_sport = htons(inet->inet_num); 541c720c7e8SEric Dumazet inet->inet_daddr = 0; 542c720c7e8SEric Dumazet inet->inet_dport = 0; 5431da177e4SLinus Torvalds sk_dst_reset(sk); 5441da177e4SLinus Torvalds err = 0; 5451da177e4SLinus Torvalds out_release_sock: 5461da177e4SLinus Torvalds release_sock(sk); 5471da177e4SLinus Torvalds out: 5481da177e4SLinus Torvalds return err; 5491da177e4SLinus Torvalds } 5503d1427f8SEric Dumazet EXPORT_SYMBOL(inet_bind); 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds int inet_dgram_connect(struct socket *sock, struct sockaddr *uaddr, 5531da177e4SLinus Torvalds int addr_len, int flags) 5541da177e4SLinus Torvalds { 5551da177e4SLinus Torvalds struct sock *sk = sock->sk; 5561da177e4SLinus Torvalds 5576503d961SChangli Gao if (addr_len < sizeof(uaddr->sa_family)) 5586503d961SChangli Gao return -EINVAL; 5591da177e4SLinus Torvalds if (uaddr->sa_family == AF_UNSPEC) 5601da177e4SLinus Torvalds return sk->sk_prot->disconnect(sk, flags); 5611da177e4SLinus Torvalds 562c720c7e8SEric Dumazet if (!inet_sk(sk)->inet_num && inet_autobind(sk)) 5631da177e4SLinus Torvalds return -EAGAIN; 564e3192690SJoe Perches return sk->sk_prot->connect(sk, uaddr, addr_len); 5651da177e4SLinus Torvalds } 5663d1427f8SEric Dumazet EXPORT_SYMBOL(inet_dgram_connect); 5671da177e4SLinus Torvalds 568783237e8SYuchung Cheng static long inet_wait_for_connect(struct sock *sk, long timeo, int writebias) 5691da177e4SLinus Torvalds { 5701da177e4SLinus Torvalds DEFINE_WAIT(wait); 5711da177e4SLinus Torvalds 572aa395145SEric Dumazet prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); 573783237e8SYuchung Cheng sk->sk_write_pending += writebias; 5741da177e4SLinus Torvalds 5751da177e4SLinus Torvalds /* Basic assumption: if someone sets sk->sk_err, he _must_ 5761da177e4SLinus Torvalds * change state of the socket from TCP_SYN_*. 5771da177e4SLinus Torvalds * Connect() does not allow to get error notifications 5781da177e4SLinus Torvalds * without closing the socket. 5791da177e4SLinus Torvalds */ 5801da177e4SLinus Torvalds while ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) { 5811da177e4SLinus Torvalds release_sock(sk); 5821da177e4SLinus Torvalds timeo = schedule_timeout(timeo); 5831da177e4SLinus Torvalds lock_sock(sk); 5841da177e4SLinus Torvalds if (signal_pending(current) || !timeo) 5851da177e4SLinus Torvalds break; 586aa395145SEric Dumazet prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); 5871da177e4SLinus Torvalds } 588aa395145SEric Dumazet finish_wait(sk_sleep(sk), &wait); 589783237e8SYuchung Cheng sk->sk_write_pending -= writebias; 5901da177e4SLinus Torvalds return timeo; 5911da177e4SLinus Torvalds } 5921da177e4SLinus Torvalds 5931da177e4SLinus Torvalds /* 5941da177e4SLinus Torvalds * Connect to a remote host. There is regrettably still a little 5951da177e4SLinus Torvalds * TCP 'magic' in here. 5961da177e4SLinus Torvalds */ 597cf60af03SYuchung Cheng int __inet_stream_connect(struct socket *sock, struct sockaddr *uaddr, 5981da177e4SLinus Torvalds int addr_len, int flags) 5991da177e4SLinus Torvalds { 6001da177e4SLinus Torvalds struct sock *sk = sock->sk; 6011da177e4SLinus Torvalds int err; 6021da177e4SLinus Torvalds long timeo; 6031da177e4SLinus Torvalds 6046503d961SChangli Gao if (addr_len < sizeof(uaddr->sa_family)) 6056503d961SChangli Gao return -EINVAL; 6066503d961SChangli Gao 6071da177e4SLinus Torvalds if (uaddr->sa_family == AF_UNSPEC) { 6081da177e4SLinus Torvalds err = sk->sk_prot->disconnect(sk, flags); 6091da177e4SLinus Torvalds sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED; 6101da177e4SLinus Torvalds goto out; 6111da177e4SLinus Torvalds } 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds switch (sock->state) { 6141da177e4SLinus Torvalds default: 6151da177e4SLinus Torvalds err = -EINVAL; 6161da177e4SLinus Torvalds goto out; 6171da177e4SLinus Torvalds case SS_CONNECTED: 6181da177e4SLinus Torvalds err = -EISCONN; 6191da177e4SLinus Torvalds goto out; 6201da177e4SLinus Torvalds case SS_CONNECTING: 6211da177e4SLinus Torvalds err = -EALREADY; 6221da177e4SLinus Torvalds /* Fall out of switch with err, set for this state */ 6231da177e4SLinus Torvalds break; 6241da177e4SLinus Torvalds case SS_UNCONNECTED: 6251da177e4SLinus Torvalds err = -EISCONN; 6261da177e4SLinus Torvalds if (sk->sk_state != TCP_CLOSE) 6271da177e4SLinus Torvalds goto out; 6281da177e4SLinus Torvalds 6291da177e4SLinus Torvalds err = sk->sk_prot->connect(sk, uaddr, addr_len); 6301da177e4SLinus Torvalds if (err < 0) 6311da177e4SLinus Torvalds goto out; 6321da177e4SLinus Torvalds 6331da177e4SLinus Torvalds sock->state = SS_CONNECTING; 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds /* Just entered SS_CONNECTING state; the only 6361da177e4SLinus Torvalds * difference is that return value in non-blocking 6371da177e4SLinus Torvalds * case is EINPROGRESS, rather than EALREADY. 6381da177e4SLinus Torvalds */ 6391da177e4SLinus Torvalds err = -EINPROGRESS; 6401da177e4SLinus Torvalds break; 6411da177e4SLinus Torvalds } 6421da177e4SLinus Torvalds 6431da177e4SLinus Torvalds timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); 6441da177e4SLinus Torvalds 6451da177e4SLinus Torvalds if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) { 646783237e8SYuchung Cheng int writebias = (sk->sk_protocol == IPPROTO_TCP) && 647783237e8SYuchung Cheng tcp_sk(sk)->fastopen_req && 648783237e8SYuchung Cheng tcp_sk(sk)->fastopen_req->data ? 1 : 0; 649783237e8SYuchung Cheng 6501da177e4SLinus Torvalds /* Error code is set above */ 651783237e8SYuchung Cheng if (!timeo || !inet_wait_for_connect(sk, timeo, writebias)) 6521da177e4SLinus Torvalds goto out; 6531da177e4SLinus Torvalds 6541da177e4SLinus Torvalds err = sock_intr_errno(timeo); 6551da177e4SLinus Torvalds if (signal_pending(current)) 6561da177e4SLinus Torvalds goto out; 6571da177e4SLinus Torvalds } 6581da177e4SLinus Torvalds 6591da177e4SLinus Torvalds /* Connection was closed by RST, timeout, ICMP error 6601da177e4SLinus Torvalds * or another process disconnected us. 6611da177e4SLinus Torvalds */ 6621da177e4SLinus Torvalds if (sk->sk_state == TCP_CLOSE) 6631da177e4SLinus Torvalds goto sock_error; 6641da177e4SLinus Torvalds 6651da177e4SLinus Torvalds /* sk->sk_err may be not zero now, if RECVERR was ordered by user 6661da177e4SLinus Torvalds * and error was received after socket entered established state. 6671da177e4SLinus Torvalds * Hence, it is handled normally after connect() return successfully. 6681da177e4SLinus Torvalds */ 6691da177e4SLinus Torvalds 6701da177e4SLinus Torvalds sock->state = SS_CONNECTED; 6711da177e4SLinus Torvalds err = 0; 6721da177e4SLinus Torvalds out: 6731da177e4SLinus Torvalds return err; 6741da177e4SLinus Torvalds 6751da177e4SLinus Torvalds sock_error: 6761da177e4SLinus Torvalds err = sock_error(sk) ? : -ECONNABORTED; 6771da177e4SLinus Torvalds sock->state = SS_UNCONNECTED; 6781da177e4SLinus Torvalds if (sk->sk_prot->disconnect(sk, flags)) 6791da177e4SLinus Torvalds sock->state = SS_DISCONNECTING; 6801da177e4SLinus Torvalds goto out; 6811da177e4SLinus Torvalds } 682cf60af03SYuchung Cheng EXPORT_SYMBOL(__inet_stream_connect); 683cf60af03SYuchung Cheng 684cf60af03SYuchung Cheng int inet_stream_connect(struct socket *sock, struct sockaddr *uaddr, 685cf60af03SYuchung Cheng int addr_len, int flags) 686cf60af03SYuchung Cheng { 687cf60af03SYuchung Cheng int err; 688cf60af03SYuchung Cheng 689cf60af03SYuchung Cheng lock_sock(sock->sk); 690cf60af03SYuchung Cheng err = __inet_stream_connect(sock, uaddr, addr_len, flags); 691cf60af03SYuchung Cheng release_sock(sock->sk); 692cf60af03SYuchung Cheng return err; 693cf60af03SYuchung Cheng } 6943d1427f8SEric Dumazet EXPORT_SYMBOL(inet_stream_connect); 6951da177e4SLinus Torvalds 6961da177e4SLinus Torvalds /* 6971da177e4SLinus Torvalds * Accept a pending connection. The TCP layer now gives BSD semantics. 6981da177e4SLinus Torvalds */ 6991da177e4SLinus Torvalds 7001da177e4SLinus Torvalds int inet_accept(struct socket *sock, struct socket *newsock, int flags) 7011da177e4SLinus Torvalds { 7021da177e4SLinus Torvalds struct sock *sk1 = sock->sk; 7031da177e4SLinus Torvalds int err = -EINVAL; 7041da177e4SLinus Torvalds struct sock *sk2 = sk1->sk_prot->accept(sk1, flags, &err); 7051da177e4SLinus Torvalds 7061da177e4SLinus Torvalds if (!sk2) 7071da177e4SLinus Torvalds goto do_err; 7081da177e4SLinus Torvalds 7091da177e4SLinus Torvalds lock_sock(sk2); 7101da177e4SLinus Torvalds 7111eddceadSEric Dumazet sock_rps_record_flow(sk2); 712547b792cSIlpo Järvinen WARN_ON(!((1 << sk2->sk_state) & 7138336886fSJerry Chu (TCPF_ESTABLISHED | TCPF_SYN_RECV | 7148336886fSJerry Chu TCPF_CLOSE_WAIT | TCPF_CLOSE))); 7151da177e4SLinus Torvalds 7161da177e4SLinus Torvalds sock_graft(sk2, newsock); 7171da177e4SLinus Torvalds 7181da177e4SLinus Torvalds newsock->state = SS_CONNECTED; 7191da177e4SLinus Torvalds err = 0; 7201da177e4SLinus Torvalds release_sock(sk2); 7211da177e4SLinus Torvalds do_err: 7221da177e4SLinus Torvalds return err; 7231da177e4SLinus Torvalds } 7243d1427f8SEric Dumazet EXPORT_SYMBOL(inet_accept); 7251da177e4SLinus Torvalds 7261da177e4SLinus Torvalds 7271da177e4SLinus Torvalds /* 7281da177e4SLinus Torvalds * This does both peername and sockname. 7291da177e4SLinus Torvalds */ 7301da177e4SLinus Torvalds int inet_getname(struct socket *sock, struct sockaddr *uaddr, 7311da177e4SLinus Torvalds int *uaddr_len, int peer) 7321da177e4SLinus Torvalds { 7331da177e4SLinus Torvalds struct sock *sk = sock->sk; 7341da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 73538bfd8f5SCyrill Gorcunov DECLARE_SOCKADDR(struct sockaddr_in *, sin, uaddr); 7361da177e4SLinus Torvalds 7371da177e4SLinus Torvalds sin->sin_family = AF_INET; 7381da177e4SLinus Torvalds if (peer) { 739c720c7e8SEric Dumazet if (!inet->inet_dport || 7401da177e4SLinus Torvalds (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && 7411da177e4SLinus Torvalds peer == 1)) 7421da177e4SLinus Torvalds return -ENOTCONN; 743c720c7e8SEric Dumazet sin->sin_port = inet->inet_dport; 744c720c7e8SEric Dumazet sin->sin_addr.s_addr = inet->inet_daddr; 7451da177e4SLinus Torvalds } else { 746c720c7e8SEric Dumazet __be32 addr = inet->inet_rcv_saddr; 7471da177e4SLinus Torvalds if (!addr) 748c720c7e8SEric Dumazet addr = inet->inet_saddr; 749c720c7e8SEric Dumazet sin->sin_port = inet->inet_sport; 7501da177e4SLinus Torvalds sin->sin_addr.s_addr = addr; 7511da177e4SLinus Torvalds } 7521da177e4SLinus Torvalds memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); 7531da177e4SLinus Torvalds *uaddr_len = sizeof(*sin); 7541da177e4SLinus Torvalds return 0; 7551da177e4SLinus Torvalds } 7563d1427f8SEric Dumazet EXPORT_SYMBOL(inet_getname); 7571da177e4SLinus Torvalds 7581da177e4SLinus Torvalds int inet_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, 7591da177e4SLinus Torvalds size_t size) 7601da177e4SLinus Torvalds { 7611da177e4SLinus Torvalds struct sock *sk = sock->sk; 7621da177e4SLinus Torvalds 763c58dc01bSDavid S. Miller sock_rps_record_flow(sk); 764fec5e652STom Herbert 7651da177e4SLinus Torvalds /* We may need to bind the socket. */ 7667ba42910SChangli Gao if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind && 7677ba42910SChangli Gao inet_autobind(sk)) 7681da177e4SLinus Torvalds return -EAGAIN; 7691da177e4SLinus Torvalds 7701da177e4SLinus Torvalds return sk->sk_prot->sendmsg(iocb, sk, msg, size); 7711da177e4SLinus Torvalds } 7723d1427f8SEric Dumazet EXPORT_SYMBOL(inet_sendmsg); 7731da177e4SLinus Torvalds 7747ba42910SChangli Gao ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset, 7753d1427f8SEric Dumazet size_t size, int flags) 7761da177e4SLinus Torvalds { 7771da177e4SLinus Torvalds struct sock *sk = sock->sk; 7781da177e4SLinus Torvalds 779c58dc01bSDavid S. Miller sock_rps_record_flow(sk); 780fec5e652STom Herbert 7811da177e4SLinus Torvalds /* We may need to bind the socket. */ 7827ba42910SChangli Gao if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind && 7837ba42910SChangli Gao inet_autobind(sk)) 7841da177e4SLinus Torvalds return -EAGAIN; 7851da177e4SLinus Torvalds 7861da177e4SLinus Torvalds if (sk->sk_prot->sendpage) 7871da177e4SLinus Torvalds return sk->sk_prot->sendpage(sk, page, offset, size, flags); 7881da177e4SLinus Torvalds return sock_no_sendpage(sock, page, offset, size, flags); 7891da177e4SLinus Torvalds } 7907ba42910SChangli Gao EXPORT_SYMBOL(inet_sendpage); 7911da177e4SLinus Torvalds 792fec5e652STom Herbert int inet_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, 793fec5e652STom Herbert size_t size, int flags) 794fec5e652STom Herbert { 795fec5e652STom Herbert struct sock *sk = sock->sk; 796fec5e652STom Herbert int addr_len = 0; 797fec5e652STom Herbert int err; 798fec5e652STom Herbert 799c58dc01bSDavid S. Miller sock_rps_record_flow(sk); 800fec5e652STom Herbert 801fec5e652STom Herbert err = sk->sk_prot->recvmsg(iocb, sk, msg, size, flags & MSG_DONTWAIT, 802fec5e652STom Herbert flags & ~MSG_DONTWAIT, &addr_len); 803fec5e652STom Herbert if (err >= 0) 804fec5e652STom Herbert msg->msg_namelen = addr_len; 805fec5e652STom Herbert return err; 806fec5e652STom Herbert } 807fec5e652STom Herbert EXPORT_SYMBOL(inet_recvmsg); 8081da177e4SLinus Torvalds 8091da177e4SLinus Torvalds int inet_shutdown(struct socket *sock, int how) 8101da177e4SLinus Torvalds { 8111da177e4SLinus Torvalds struct sock *sk = sock->sk; 8121da177e4SLinus Torvalds int err = 0; 8131da177e4SLinus Torvalds 8141da177e4SLinus Torvalds /* This should really check to make sure 8151da177e4SLinus Torvalds * the socket is a TCP socket. (WHY AC...) 8161da177e4SLinus Torvalds */ 8171da177e4SLinus Torvalds how++; /* maps 0->1 has the advantage of making bit 1 rcvs and 8181da177e4SLinus Torvalds 1->2 bit 2 snds. 8191da177e4SLinus Torvalds 2->3 */ 8201da177e4SLinus Torvalds if ((how & ~SHUTDOWN_MASK) || !how) /* MAXINT->0 */ 8211da177e4SLinus Torvalds return -EINVAL; 8221da177e4SLinus Torvalds 8231da177e4SLinus Torvalds lock_sock(sk); 8241da177e4SLinus Torvalds if (sock->state == SS_CONNECTING) { 8251da177e4SLinus Torvalds if ((1 << sk->sk_state) & 8261da177e4SLinus Torvalds (TCPF_SYN_SENT | TCPF_SYN_RECV | TCPF_CLOSE)) 8271da177e4SLinus Torvalds sock->state = SS_DISCONNECTING; 8281da177e4SLinus Torvalds else 8291da177e4SLinus Torvalds sock->state = SS_CONNECTED; 8301da177e4SLinus Torvalds } 8311da177e4SLinus Torvalds 8321da177e4SLinus Torvalds switch (sk->sk_state) { 8331da177e4SLinus Torvalds case TCP_CLOSE: 8341da177e4SLinus Torvalds err = -ENOTCONN; 8351da177e4SLinus Torvalds /* Hack to wake up other listeners, who can poll for 8361da177e4SLinus Torvalds POLLHUP, even on eg. unconnected UDP sockets -- RR */ 8371da177e4SLinus Torvalds default: 8381da177e4SLinus Torvalds sk->sk_shutdown |= how; 8391da177e4SLinus Torvalds if (sk->sk_prot->shutdown) 8401da177e4SLinus Torvalds sk->sk_prot->shutdown(sk, how); 8411da177e4SLinus Torvalds break; 8421da177e4SLinus Torvalds 8431da177e4SLinus Torvalds /* Remaining two branches are temporary solution for missing 8441da177e4SLinus Torvalds * close() in multithreaded environment. It is _not_ a good idea, 8451da177e4SLinus Torvalds * but we have no choice until close() is repaired at VFS level. 8461da177e4SLinus Torvalds */ 8471da177e4SLinus Torvalds case TCP_LISTEN: 8481da177e4SLinus Torvalds if (!(how & RCV_SHUTDOWN)) 8491da177e4SLinus Torvalds break; 8501da177e4SLinus Torvalds /* Fall through */ 8511da177e4SLinus Torvalds case TCP_SYN_SENT: 8521da177e4SLinus Torvalds err = sk->sk_prot->disconnect(sk, O_NONBLOCK); 8531da177e4SLinus Torvalds sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED; 8541da177e4SLinus Torvalds break; 8551da177e4SLinus Torvalds } 8561da177e4SLinus Torvalds 8571da177e4SLinus Torvalds /* Wake up anyone sleeping in poll. */ 8581da177e4SLinus Torvalds sk->sk_state_change(sk); 8591da177e4SLinus Torvalds release_sock(sk); 8601da177e4SLinus Torvalds return err; 8611da177e4SLinus Torvalds } 8623d1427f8SEric Dumazet EXPORT_SYMBOL(inet_shutdown); 8631da177e4SLinus Torvalds 8641da177e4SLinus Torvalds /* 8651da177e4SLinus Torvalds * ioctl() calls you can issue on an INET socket. Most of these are 8661da177e4SLinus Torvalds * device configuration and stuff and very rarely used. Some ioctls 8671da177e4SLinus Torvalds * pass on to the socket itself. 8681da177e4SLinus Torvalds * 8691da177e4SLinus Torvalds * NOTE: I like the idea of a module for the config stuff. ie ifconfig 8701da177e4SLinus Torvalds * loads the devconfigure module does its configuring and unloads it. 8711da177e4SLinus Torvalds * There's a good 20K of config code hanging around the kernel. 8721da177e4SLinus Torvalds */ 8731da177e4SLinus Torvalds 8741da177e4SLinus Torvalds int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 8751da177e4SLinus Torvalds { 8761da177e4SLinus Torvalds struct sock *sk = sock->sk; 8771da177e4SLinus Torvalds int err = 0; 8783b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(sk); 8791da177e4SLinus Torvalds 8801da177e4SLinus Torvalds switch (cmd) { 8811da177e4SLinus Torvalds case SIOCGSTAMP: 8821da177e4SLinus Torvalds err = sock_get_timestamp(sk, (struct timeval __user *)arg); 8831da177e4SLinus Torvalds break; 884ae40eb1eSEric Dumazet case SIOCGSTAMPNS: 885ae40eb1eSEric Dumazet err = sock_get_timestampns(sk, (struct timespec __user *)arg); 886ae40eb1eSEric Dumazet break; 8871da177e4SLinus Torvalds case SIOCADDRT: 8881da177e4SLinus Torvalds case SIOCDELRT: 8891da177e4SLinus Torvalds case SIOCRTMSG: 890e5b13cb1SDenis V. Lunev err = ip_rt_ioctl(net, cmd, (void __user *)arg); 8911da177e4SLinus Torvalds break; 8921da177e4SLinus Torvalds case SIOCDARP: 8931da177e4SLinus Torvalds case SIOCGARP: 8941da177e4SLinus Torvalds case SIOCSARP: 895e5b13cb1SDenis V. Lunev err = arp_ioctl(net, cmd, (void __user *)arg); 8961da177e4SLinus Torvalds break; 8971da177e4SLinus Torvalds case SIOCGIFADDR: 8981da177e4SLinus Torvalds case SIOCSIFADDR: 8991da177e4SLinus Torvalds case SIOCGIFBRDADDR: 9001da177e4SLinus Torvalds case SIOCSIFBRDADDR: 9011da177e4SLinus Torvalds case SIOCGIFNETMASK: 9021da177e4SLinus Torvalds case SIOCSIFNETMASK: 9031da177e4SLinus Torvalds case SIOCGIFDSTADDR: 9041da177e4SLinus Torvalds case SIOCSIFDSTADDR: 9051da177e4SLinus Torvalds case SIOCSIFPFLAGS: 9061da177e4SLinus Torvalds case SIOCGIFPFLAGS: 9071da177e4SLinus Torvalds case SIOCSIFFLAGS: 908e5b13cb1SDenis V. Lunev err = devinet_ioctl(net, cmd, (void __user *)arg); 9091da177e4SLinus Torvalds break; 9101da177e4SLinus Torvalds default: 911b5e5fa5eSChristoph Hellwig if (sk->sk_prot->ioctl) 912b5e5fa5eSChristoph Hellwig err = sk->sk_prot->ioctl(sk, cmd, arg); 913b5e5fa5eSChristoph Hellwig else 914b5e5fa5eSChristoph Hellwig err = -ENOIOCTLCMD; 9151da177e4SLinus Torvalds break; 9161da177e4SLinus Torvalds } 9171da177e4SLinus Torvalds return err; 9181da177e4SLinus Torvalds } 9193d1427f8SEric Dumazet EXPORT_SYMBOL(inet_ioctl); 9201da177e4SLinus Torvalds 921709b46e8SEric W. Biederman #ifdef CONFIG_COMPAT 922686dc6b6SGerrit Renker static int inet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 923709b46e8SEric W. Biederman { 924709b46e8SEric W. Biederman struct sock *sk = sock->sk; 925709b46e8SEric W. Biederman int err = -ENOIOCTLCMD; 926709b46e8SEric W. Biederman 927709b46e8SEric W. Biederman if (sk->sk_prot->compat_ioctl) 928709b46e8SEric W. Biederman err = sk->sk_prot->compat_ioctl(sk, cmd, arg); 929709b46e8SEric W. Biederman 930709b46e8SEric W. Biederman return err; 931709b46e8SEric W. Biederman } 932709b46e8SEric W. Biederman #endif 933709b46e8SEric W. Biederman 93490ddc4f0SEric Dumazet const struct proto_ops inet_stream_ops = { 9351da177e4SLinus Torvalds .family = PF_INET, 9361da177e4SLinus Torvalds .owner = THIS_MODULE, 9371da177e4SLinus Torvalds .release = inet_release, 9381da177e4SLinus Torvalds .bind = inet_bind, 9391da177e4SLinus Torvalds .connect = inet_stream_connect, 9401da177e4SLinus Torvalds .socketpair = sock_no_socketpair, 9411da177e4SLinus Torvalds .accept = inet_accept, 9421da177e4SLinus Torvalds .getname = inet_getname, 9431da177e4SLinus Torvalds .poll = tcp_poll, 9441da177e4SLinus Torvalds .ioctl = inet_ioctl, 9451da177e4SLinus Torvalds .listen = inet_listen, 9461da177e4SLinus Torvalds .shutdown = inet_shutdown, 9471da177e4SLinus Torvalds .setsockopt = sock_common_setsockopt, 9481da177e4SLinus Torvalds .getsockopt = sock_common_getsockopt, 9497ba42910SChangli Gao .sendmsg = inet_sendmsg, 950fec5e652STom Herbert .recvmsg = inet_recvmsg, 951543d9cfeSArnaldo Carvalho de Melo .mmap = sock_no_mmap, 9527ba42910SChangli Gao .sendpage = inet_sendpage, 9539c55e01cSJens Axboe .splice_read = tcp_splice_read, 9543fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 9553fdadf7dSDmitry Mishin .compat_setsockopt = compat_sock_common_setsockopt, 9563fdadf7dSDmitry Mishin .compat_getsockopt = compat_sock_common_getsockopt, 957709b46e8SEric W. Biederman .compat_ioctl = inet_compat_ioctl, 9583fdadf7dSDmitry Mishin #endif 9591da177e4SLinus Torvalds }; 9603d1427f8SEric Dumazet EXPORT_SYMBOL(inet_stream_ops); 9611da177e4SLinus Torvalds 96290ddc4f0SEric Dumazet const struct proto_ops inet_dgram_ops = { 9631da177e4SLinus Torvalds .family = PF_INET, 9641da177e4SLinus Torvalds .owner = THIS_MODULE, 9651da177e4SLinus Torvalds .release = inet_release, 9661da177e4SLinus Torvalds .bind = inet_bind, 9671da177e4SLinus Torvalds .connect = inet_dgram_connect, 9681da177e4SLinus Torvalds .socketpair = sock_no_socketpair, 9691da177e4SLinus Torvalds .accept = sock_no_accept, 9701da177e4SLinus Torvalds .getname = inet_getname, 9711da177e4SLinus Torvalds .poll = udp_poll, 9721da177e4SLinus Torvalds .ioctl = inet_ioctl, 9731da177e4SLinus Torvalds .listen = sock_no_listen, 9741da177e4SLinus Torvalds .shutdown = inet_shutdown, 9751da177e4SLinus Torvalds .setsockopt = sock_common_setsockopt, 9761da177e4SLinus Torvalds .getsockopt = sock_common_getsockopt, 9771da177e4SLinus Torvalds .sendmsg = inet_sendmsg, 978fec5e652STom Herbert .recvmsg = inet_recvmsg, 9791da177e4SLinus Torvalds .mmap = sock_no_mmap, 9801da177e4SLinus Torvalds .sendpage = inet_sendpage, 981543d9cfeSArnaldo Carvalho de Melo #ifdef CONFIG_COMPAT 982543d9cfeSArnaldo Carvalho de Melo .compat_setsockopt = compat_sock_common_setsockopt, 983543d9cfeSArnaldo Carvalho de Melo .compat_getsockopt = compat_sock_common_getsockopt, 984709b46e8SEric W. Biederman .compat_ioctl = inet_compat_ioctl, 985543d9cfeSArnaldo Carvalho de Melo #endif 9861da177e4SLinus Torvalds }; 9873d1427f8SEric Dumazet EXPORT_SYMBOL(inet_dgram_ops); 9881da177e4SLinus Torvalds 9891da177e4SLinus Torvalds /* 9901da177e4SLinus Torvalds * For SOCK_RAW sockets; should be the same as inet_dgram_ops but without 9911da177e4SLinus Torvalds * udp_poll 9921da177e4SLinus Torvalds */ 99390ddc4f0SEric Dumazet static const struct proto_ops inet_sockraw_ops = { 9941da177e4SLinus Torvalds .family = PF_INET, 9951da177e4SLinus Torvalds .owner = THIS_MODULE, 9961da177e4SLinus Torvalds .release = inet_release, 9971da177e4SLinus Torvalds .bind = inet_bind, 9981da177e4SLinus Torvalds .connect = inet_dgram_connect, 9991da177e4SLinus Torvalds .socketpair = sock_no_socketpair, 10001da177e4SLinus Torvalds .accept = sock_no_accept, 10011da177e4SLinus Torvalds .getname = inet_getname, 10021da177e4SLinus Torvalds .poll = datagram_poll, 10031da177e4SLinus Torvalds .ioctl = inet_ioctl, 10041da177e4SLinus Torvalds .listen = sock_no_listen, 10051da177e4SLinus Torvalds .shutdown = inet_shutdown, 10061da177e4SLinus Torvalds .setsockopt = sock_common_setsockopt, 10071da177e4SLinus Torvalds .getsockopt = sock_common_getsockopt, 10081da177e4SLinus Torvalds .sendmsg = inet_sendmsg, 1009fec5e652STom Herbert .recvmsg = inet_recvmsg, 10101da177e4SLinus Torvalds .mmap = sock_no_mmap, 10111da177e4SLinus Torvalds .sendpage = inet_sendpage, 1012543d9cfeSArnaldo Carvalho de Melo #ifdef CONFIG_COMPAT 1013543d9cfeSArnaldo Carvalho de Melo .compat_setsockopt = compat_sock_common_setsockopt, 1014543d9cfeSArnaldo Carvalho de Melo .compat_getsockopt = compat_sock_common_getsockopt, 1015709b46e8SEric W. Biederman .compat_ioctl = inet_compat_ioctl, 1016543d9cfeSArnaldo Carvalho de Melo #endif 10171da177e4SLinus Torvalds }; 10181da177e4SLinus Torvalds 1019ec1b4cf7SStephen Hemminger static const struct net_proto_family inet_family_ops = { 10201da177e4SLinus Torvalds .family = PF_INET, 10211da177e4SLinus Torvalds .create = inet_create, 10221da177e4SLinus Torvalds .owner = THIS_MODULE, 10231da177e4SLinus Torvalds }; 10241da177e4SLinus Torvalds 10251da177e4SLinus Torvalds /* Upon startup we insert all the elements in inetsw_array[] into 10261da177e4SLinus Torvalds * the linked list inetsw. 10271da177e4SLinus Torvalds */ 10281da177e4SLinus Torvalds static struct inet_protosw inetsw_array[] = 10291da177e4SLinus Torvalds { 10301da177e4SLinus Torvalds { 10311da177e4SLinus Torvalds .type = SOCK_STREAM, 10321da177e4SLinus Torvalds .protocol = IPPROTO_TCP, 10331da177e4SLinus Torvalds .prot = &tcp_prot, 10341da177e4SLinus Torvalds .ops = &inet_stream_ops, 10351da177e4SLinus Torvalds .no_check = 0, 1036d83d8461SArnaldo Carvalho de Melo .flags = INET_PROTOSW_PERMANENT | 1037d83d8461SArnaldo Carvalho de Melo INET_PROTOSW_ICSK, 10381da177e4SLinus Torvalds }, 10391da177e4SLinus Torvalds 10401da177e4SLinus Torvalds { 10411da177e4SLinus Torvalds .type = SOCK_DGRAM, 10421da177e4SLinus Torvalds .protocol = IPPROTO_UDP, 10431da177e4SLinus Torvalds .prot = &udp_prot, 10441da177e4SLinus Torvalds .ops = &inet_dgram_ops, 10451da177e4SLinus Torvalds .no_check = UDP_CSUM_DEFAULT, 10461da177e4SLinus Torvalds .flags = INET_PROTOSW_PERMANENT, 10471da177e4SLinus Torvalds }, 10481da177e4SLinus Torvalds 1049c319b4d7SVasiliy Kulikov { 1050c319b4d7SVasiliy Kulikov .type = SOCK_DGRAM, 1051c319b4d7SVasiliy Kulikov .protocol = IPPROTO_ICMP, 1052c319b4d7SVasiliy Kulikov .prot = &ping_prot, 1053c319b4d7SVasiliy Kulikov .ops = &inet_dgram_ops, 1054c319b4d7SVasiliy Kulikov .no_check = UDP_CSUM_DEFAULT, 1055c319b4d7SVasiliy Kulikov .flags = INET_PROTOSW_REUSE, 1056c319b4d7SVasiliy Kulikov }, 10571da177e4SLinus Torvalds 10581da177e4SLinus Torvalds { 10591da177e4SLinus Torvalds .type = SOCK_RAW, 10601da177e4SLinus Torvalds .protocol = IPPROTO_IP, /* wild card */ 10611da177e4SLinus Torvalds .prot = &raw_prot, 10621da177e4SLinus Torvalds .ops = &inet_sockraw_ops, 10631da177e4SLinus Torvalds .no_check = UDP_CSUM_DEFAULT, 10641da177e4SLinus Torvalds .flags = INET_PROTOSW_REUSE, 10651da177e4SLinus Torvalds } 10661da177e4SLinus Torvalds }; 10671da177e4SLinus Torvalds 1068c40f6fffSDenis Cheng #define INETSW_ARRAY_LEN ARRAY_SIZE(inetsw_array) 10691da177e4SLinus Torvalds 10701da177e4SLinus Torvalds void inet_register_protosw(struct inet_protosw *p) 10711da177e4SLinus Torvalds { 10721da177e4SLinus Torvalds struct list_head *lh; 10731da177e4SLinus Torvalds struct inet_protosw *answer; 10741da177e4SLinus Torvalds int protocol = p->protocol; 10751da177e4SLinus Torvalds struct list_head *last_perm; 10761da177e4SLinus Torvalds 10771da177e4SLinus Torvalds spin_lock_bh(&inetsw_lock); 10781da177e4SLinus Torvalds 10791da177e4SLinus Torvalds if (p->type >= SOCK_MAX) 10801da177e4SLinus Torvalds goto out_illegal; 10811da177e4SLinus Torvalds 10821da177e4SLinus Torvalds /* If we are trying to override a permanent protocol, bail. */ 10831da177e4SLinus Torvalds answer = NULL; 10841da177e4SLinus Torvalds last_perm = &inetsw[p->type]; 10851da177e4SLinus Torvalds list_for_each(lh, &inetsw[p->type]) { 10861da177e4SLinus Torvalds answer = list_entry(lh, struct inet_protosw, list); 10871da177e4SLinus Torvalds 10881da177e4SLinus Torvalds /* Check only the non-wild match. */ 10891da177e4SLinus Torvalds if (INET_PROTOSW_PERMANENT & answer->flags) { 10901da177e4SLinus Torvalds if (protocol == answer->protocol) 10911da177e4SLinus Torvalds break; 10921da177e4SLinus Torvalds last_perm = lh; 10931da177e4SLinus Torvalds } 10941da177e4SLinus Torvalds 10951da177e4SLinus Torvalds answer = NULL; 10961da177e4SLinus Torvalds } 10971da177e4SLinus Torvalds if (answer) 10981da177e4SLinus Torvalds goto out_permanent; 10991da177e4SLinus Torvalds 11001da177e4SLinus Torvalds /* Add the new entry after the last permanent entry if any, so that 11011da177e4SLinus Torvalds * the new entry does not override a permanent entry when matched with 11021da177e4SLinus Torvalds * a wild-card protocol. But it is allowed to override any existing 11031da177e4SLinus Torvalds * non-permanent entry. This means that when we remove this entry, the 11041da177e4SLinus Torvalds * system automatically returns to the old behavior. 11051da177e4SLinus Torvalds */ 11061da177e4SLinus Torvalds list_add_rcu(&p->list, last_perm); 11071da177e4SLinus Torvalds out: 11081da177e4SLinus Torvalds spin_unlock_bh(&inetsw_lock); 11091da177e4SLinus Torvalds 11101da177e4SLinus Torvalds return; 11111da177e4SLinus Torvalds 11121da177e4SLinus Torvalds out_permanent: 1113058bd4d2SJoe Perches pr_err("Attempt to override permanent protocol %d\n", protocol); 11141da177e4SLinus Torvalds goto out; 11151da177e4SLinus Torvalds 11161da177e4SLinus Torvalds out_illegal: 1117058bd4d2SJoe Perches pr_err("Ignoring attempt to register invalid socket type %d\n", 11181da177e4SLinus Torvalds p->type); 11191da177e4SLinus Torvalds goto out; 11201da177e4SLinus Torvalds } 11213d1427f8SEric Dumazet EXPORT_SYMBOL(inet_register_protosw); 11221da177e4SLinus Torvalds 11231da177e4SLinus Torvalds void inet_unregister_protosw(struct inet_protosw *p) 11241da177e4SLinus Torvalds { 11251da177e4SLinus Torvalds if (INET_PROTOSW_PERMANENT & p->flags) { 1126058bd4d2SJoe Perches pr_err("Attempt to unregister permanent protocol %d\n", 11271da177e4SLinus Torvalds p->protocol); 11281da177e4SLinus Torvalds } else { 11291da177e4SLinus Torvalds spin_lock_bh(&inetsw_lock); 11301da177e4SLinus Torvalds list_del_rcu(&p->list); 11311da177e4SLinus Torvalds spin_unlock_bh(&inetsw_lock); 11321da177e4SLinus Torvalds 11331da177e4SLinus Torvalds synchronize_net(); 11341da177e4SLinus Torvalds } 11351da177e4SLinus Torvalds } 11363d1427f8SEric Dumazet EXPORT_SYMBOL(inet_unregister_protosw); 11371da177e4SLinus Torvalds 113832519f11SArnaldo Carvalho de Melo /* 113932519f11SArnaldo Carvalho de Melo * Shall we try to damage output packets if routing dev changes? 114032519f11SArnaldo Carvalho de Melo */ 114132519f11SArnaldo Carvalho de Melo 1142ab32ea5dSBrian Haley int sysctl_ip_dynaddr __read_mostly; 114332519f11SArnaldo Carvalho de Melo 114432519f11SArnaldo Carvalho de Melo static int inet_sk_reselect_saddr(struct sock *sk) 114532519f11SArnaldo Carvalho de Melo { 114632519f11SArnaldo Carvalho de Melo struct inet_sock *inet = inet_sk(sk); 1147c720c7e8SEric Dumazet __be32 old_saddr = inet->inet_saddr; 1148c720c7e8SEric Dumazet __be32 daddr = inet->inet_daddr; 11496e869138SDavid S. Miller struct flowi4 *fl4; 1150b23dd4feSDavid S. Miller struct rtable *rt; 1151b23dd4feSDavid S. Miller __be32 new_saddr; 1152f6d8bd05SEric Dumazet struct ip_options_rcu *inet_opt; 115332519f11SArnaldo Carvalho de Melo 1154f6d8bd05SEric Dumazet inet_opt = rcu_dereference_protected(inet->inet_opt, 1155f6d8bd05SEric Dumazet sock_owned_by_user(sk)); 1156f6d8bd05SEric Dumazet if (inet_opt && inet_opt->opt.srr) 1157f6d8bd05SEric Dumazet daddr = inet_opt->opt.faddr; 115832519f11SArnaldo Carvalho de Melo 115932519f11SArnaldo Carvalho de Melo /* Query new route. */ 11606e869138SDavid S. Miller fl4 = &inet->cork.fl.u.ip4; 11616e869138SDavid S. Miller rt = ip_route_connect(fl4, daddr, 0, RT_CONN_FLAGS(sk), 1162b23dd4feSDavid S. Miller sk->sk_bound_dev_if, sk->sk_protocol, 1163abdf7e72SDavid S. Miller inet->inet_sport, inet->inet_dport, sk, false); 1164b23dd4feSDavid S. Miller if (IS_ERR(rt)) 1165b23dd4feSDavid S. Miller return PTR_ERR(rt); 116632519f11SArnaldo Carvalho de Melo 1167d8d1f30bSChangli Gao sk_setup_caps(sk, &rt->dst); 116832519f11SArnaldo Carvalho de Melo 11696e869138SDavid S. Miller new_saddr = fl4->saddr; 117032519f11SArnaldo Carvalho de Melo 117132519f11SArnaldo Carvalho de Melo if (new_saddr == old_saddr) 117232519f11SArnaldo Carvalho de Melo return 0; 117332519f11SArnaldo Carvalho de Melo 117432519f11SArnaldo Carvalho de Melo if (sysctl_ip_dynaddr > 1) { 1175058bd4d2SJoe Perches pr_info("%s(): shifting inet->saddr from %pI4 to %pI4\n", 1176673d57e7SHarvey Harrison __func__, &old_saddr, &new_saddr); 117732519f11SArnaldo Carvalho de Melo } 117832519f11SArnaldo Carvalho de Melo 1179c720c7e8SEric Dumazet inet->inet_saddr = inet->inet_rcv_saddr = new_saddr; 118032519f11SArnaldo Carvalho de Melo 118132519f11SArnaldo Carvalho de Melo /* 118232519f11SArnaldo Carvalho de Melo * XXX The only one ugly spot where we need to 118332519f11SArnaldo Carvalho de Melo * XXX really change the sockets identity after 118432519f11SArnaldo Carvalho de Melo * XXX it has entered the hashes. -DaveM 118532519f11SArnaldo Carvalho de Melo * 118632519f11SArnaldo Carvalho de Melo * Besides that, it does not check for connection 118732519f11SArnaldo Carvalho de Melo * uniqueness. Wait for troubles. 118832519f11SArnaldo Carvalho de Melo */ 118932519f11SArnaldo Carvalho de Melo __sk_prot_rehash(sk); 119032519f11SArnaldo Carvalho de Melo return 0; 119132519f11SArnaldo Carvalho de Melo } 119232519f11SArnaldo Carvalho de Melo 119332519f11SArnaldo Carvalho de Melo int inet_sk_rebuild_header(struct sock *sk) 119432519f11SArnaldo Carvalho de Melo { 119532519f11SArnaldo Carvalho de Melo struct inet_sock *inet = inet_sk(sk); 119632519f11SArnaldo Carvalho de Melo struct rtable *rt = (struct rtable *)__sk_dst_check(sk, 0); 11973ca3c68eSAl Viro __be32 daddr; 1198f6d8bd05SEric Dumazet struct ip_options_rcu *inet_opt; 11996e869138SDavid S. Miller struct flowi4 *fl4; 120032519f11SArnaldo Carvalho de Melo int err; 120132519f11SArnaldo Carvalho de Melo 120232519f11SArnaldo Carvalho de Melo /* Route is OK, nothing to do. */ 120332519f11SArnaldo Carvalho de Melo if (rt) 120432519f11SArnaldo Carvalho de Melo return 0; 120532519f11SArnaldo Carvalho de Melo 120632519f11SArnaldo Carvalho de Melo /* Reroute. */ 1207f6d8bd05SEric Dumazet rcu_read_lock(); 1208f6d8bd05SEric Dumazet inet_opt = rcu_dereference(inet->inet_opt); 1209c720c7e8SEric Dumazet daddr = inet->inet_daddr; 1210f6d8bd05SEric Dumazet if (inet_opt && inet_opt->opt.srr) 1211f6d8bd05SEric Dumazet daddr = inet_opt->opt.faddr; 1212f6d8bd05SEric Dumazet rcu_read_unlock(); 12136e869138SDavid S. Miller fl4 = &inet->cork.fl.u.ip4; 12146e869138SDavid S. Miller rt = ip_route_output_ports(sock_net(sk), fl4, sk, daddr, inet->inet_saddr, 121578fbfd8aSDavid S. Miller inet->inet_dport, inet->inet_sport, 121678fbfd8aSDavid S. Miller sk->sk_protocol, RT_CONN_FLAGS(sk), 121778fbfd8aSDavid S. Miller sk->sk_bound_dev_if); 1218b23dd4feSDavid S. Miller if (!IS_ERR(rt)) { 1219b23dd4feSDavid S. Miller err = 0; 1220d8d1f30bSChangli Gao sk_setup_caps(sk, &rt->dst); 1221b23dd4feSDavid S. Miller } else { 1222b23dd4feSDavid S. Miller err = PTR_ERR(rt); 1223b23dd4feSDavid S. Miller 122432519f11SArnaldo Carvalho de Melo /* Routing failed... */ 122532519f11SArnaldo Carvalho de Melo sk->sk_route_caps = 0; 122632519f11SArnaldo Carvalho de Melo /* 122732519f11SArnaldo Carvalho de Melo * Other protocols have to map its equivalent state to TCP_SYN_SENT. 122832519f11SArnaldo Carvalho de Melo * DCCP maps its DCCP_REQUESTING state to TCP_SYN_SENT. -acme 122932519f11SArnaldo Carvalho de Melo */ 123032519f11SArnaldo Carvalho de Melo if (!sysctl_ip_dynaddr || 123132519f11SArnaldo Carvalho de Melo sk->sk_state != TCP_SYN_SENT || 123232519f11SArnaldo Carvalho de Melo (sk->sk_userlocks & SOCK_BINDADDR_LOCK) || 123332519f11SArnaldo Carvalho de Melo (err = inet_sk_reselect_saddr(sk)) != 0) 123432519f11SArnaldo Carvalho de Melo sk->sk_err_soft = -err; 123532519f11SArnaldo Carvalho de Melo } 123632519f11SArnaldo Carvalho de Melo 123732519f11SArnaldo Carvalho de Melo return err; 123832519f11SArnaldo Carvalho de Melo } 123932519f11SArnaldo Carvalho de Melo EXPORT_SYMBOL(inet_sk_rebuild_header); 124032519f11SArnaldo Carvalho de Melo 1241a430a43dSHerbert Xu static int inet_gso_send_check(struct sk_buff *skb) 1242a430a43dSHerbert Xu { 1243bca49f84SVlad Yasevich const struct net_offload *ops; 1244f9242b6bSDavid S. Miller const struct iphdr *iph; 1245a430a43dSHerbert Xu int proto; 1246a430a43dSHerbert Xu int ihl; 1247a430a43dSHerbert Xu int err = -EINVAL; 1248a430a43dSHerbert Xu 1249a430a43dSHerbert Xu if (unlikely(!pskb_may_pull(skb, sizeof(*iph)))) 1250a430a43dSHerbert Xu goto out; 1251a430a43dSHerbert Xu 1252eddc9ec5SArnaldo Carvalho de Melo iph = ip_hdr(skb); 1253a430a43dSHerbert Xu ihl = iph->ihl * 4; 1254a430a43dSHerbert Xu if (ihl < sizeof(*iph)) 1255a430a43dSHerbert Xu goto out; 1256a430a43dSHerbert Xu 125747d27aadSEric Dumazet proto = iph->protocol; 125847d27aadSEric Dumazet 125947d27aadSEric Dumazet /* Warning: after this point, iph might be no longer valid */ 1260a430a43dSHerbert Xu if (unlikely(!pskb_may_pull(skb, ihl))) 1261a430a43dSHerbert Xu goto out; 1262badff6d0SArnaldo Carvalho de Melo __skb_pull(skb, ihl); 126347d27aadSEric Dumazet 1264badff6d0SArnaldo Carvalho de Melo skb_reset_transport_header(skb); 1265a430a43dSHerbert Xu err = -EPROTONOSUPPORT; 1266a430a43dSHerbert Xu 1267bca49f84SVlad Yasevich ops = rcu_dereference(inet_offloads[proto]); 1268f191a1d1SVlad Yasevich if (likely(ops && ops->callbacks.gso_send_check)) 1269f191a1d1SVlad Yasevich err = ops->callbacks.gso_send_check(skb); 1270a430a43dSHerbert Xu 1271a430a43dSHerbert Xu out: 1272a430a43dSHerbert Xu return err; 1273a430a43dSHerbert Xu } 1274a430a43dSHerbert Xu 1275c8f44affSMichał Mirosław static struct sk_buff *inet_gso_segment(struct sk_buff *skb, 1276c8f44affSMichał Mirosław netdev_features_t features) 1277f4c50d99SHerbert Xu { 1278f4c50d99SHerbert Xu struct sk_buff *segs = ERR_PTR(-EINVAL); 1279bca49f84SVlad Yasevich const struct net_offload *ops; 12803347c960SEric Dumazet unsigned int offset = 0; 1281f9242b6bSDavid S. Miller struct iphdr *iph; 12823347c960SEric Dumazet bool tunnel; 1283f4c50d99SHerbert Xu int proto; 12843347c960SEric Dumazet int nhoff; 1285f4c50d99SHerbert Xu int ihl; 1286f4c50d99SHerbert Xu int id; 1287f4c50d99SHerbert Xu 1288bbcf467dSHerbert Xu if (unlikely(skb_shinfo(skb)->gso_type & 1289bbcf467dSHerbert Xu ~(SKB_GSO_TCPV4 | 1290bbcf467dSHerbert Xu SKB_GSO_UDP | 1291bbcf467dSHerbert Xu SKB_GSO_DODGY | 1292bbcf467dSHerbert Xu SKB_GSO_TCP_ECN | 129368c33163SPravin B Shelar SKB_GSO_GRE | 12949b3eb5edSPravin B Shelar SKB_GSO_TCPV6 | 129573136267SPravin B Shelar SKB_GSO_UDP_TUNNEL | 12960d89d203SSimon Horman SKB_GSO_MPLS | 1297bbcf467dSHerbert Xu 0))) 1298bbcf467dSHerbert Xu goto out; 1299bbcf467dSHerbert Xu 13003347c960SEric Dumazet skb_reset_network_header(skb); 13013347c960SEric Dumazet nhoff = skb_network_header(skb) - skb_mac_header(skb); 1302bbcf467dSHerbert Xu if (unlikely(!pskb_may_pull(skb, sizeof(*iph)))) 1303f4c50d99SHerbert Xu goto out; 1304f4c50d99SHerbert Xu 1305eddc9ec5SArnaldo Carvalho de Melo iph = ip_hdr(skb); 1306f4c50d99SHerbert Xu ihl = iph->ihl * 4; 1307f4c50d99SHerbert Xu if (ihl < sizeof(*iph)) 1308f4c50d99SHerbert Xu goto out; 1309f4c50d99SHerbert Xu 131047d27aadSEric Dumazet id = ntohs(iph->id); 131147d27aadSEric Dumazet proto = iph->protocol; 131247d27aadSEric Dumazet 131347d27aadSEric Dumazet /* Warning: after this point, iph might be no longer valid */ 1314bbcf467dSHerbert Xu if (unlikely(!pskb_may_pull(skb, ihl))) 1315f4c50d99SHerbert Xu goto out; 131647d27aadSEric Dumazet __skb_pull(skb, ihl); 1317f4c50d99SHerbert Xu 13183347c960SEric Dumazet tunnel = SKB_GSO_CB(skb)->encap_level > 0; 13193347c960SEric Dumazet if (tunnel) 13203347c960SEric Dumazet features = skb->dev->hw_enc_features & netif_skb_features(skb); 13213347c960SEric Dumazet SKB_GSO_CB(skb)->encap_level += ihl; 132273136267SPravin B Shelar 1323badff6d0SArnaldo Carvalho de Melo skb_reset_transport_header(skb); 132447d27aadSEric Dumazet 1325f4c50d99SHerbert Xu segs = ERR_PTR(-EPROTONOSUPPORT); 1326f4c50d99SHerbert Xu 1327bca49f84SVlad Yasevich ops = rcu_dereference(inet_offloads[proto]); 1328f191a1d1SVlad Yasevich if (likely(ops && ops->callbacks.gso_segment)) 1329f191a1d1SVlad Yasevich segs = ops->callbacks.gso_segment(skb, features); 1330f4c50d99SHerbert Xu 133150c3a487SYOSHIFUJI Hideaki / 吉藤英明 if (IS_ERR_OR_NULL(segs)) 1332f4c50d99SHerbert Xu goto out; 1333f4c50d99SHerbert Xu 1334f4c50d99SHerbert Xu skb = segs; 1335f4c50d99SHerbert Xu do { 13363347c960SEric Dumazet iph = (struct iphdr *)(skb_mac_header(skb) + nhoff); 133773136267SPravin B Shelar if (!tunnel && proto == IPPROTO_UDP) { 1338d7ca4cc0SSridhar Samudrala iph->id = htons(id); 1339d7ca4cc0SSridhar Samudrala iph->frag_off = htons(offset >> 3); 1340d7ca4cc0SSridhar Samudrala if (skb->next != NULL) 1341d7ca4cc0SSridhar Samudrala iph->frag_off |= htons(IP_MF); 13423347c960SEric Dumazet offset += skb->len - nhoff - ihl; 1343490ab081SPravin B Shelar } else { 1344f4c50d99SHerbert Xu iph->id = htons(id++); 1345490ab081SPravin B Shelar } 13463347c960SEric Dumazet iph->tot_len = htons(skb->len - nhoff); 134747d27aadSEric Dumazet ip_send_check(iph); 13483347c960SEric Dumazet if (tunnel) { 13493347c960SEric Dumazet skb_reset_inner_headers(skb); 13503347c960SEric Dumazet skb->encapsulation = 1; 13513347c960SEric Dumazet } 13523347c960SEric Dumazet skb->network_header = (u8 *)iph - skb->head; 1353f4c50d99SHerbert Xu } while ((skb = skb->next)); 1354f4c50d99SHerbert Xu 1355f4c50d99SHerbert Xu out: 1356f4c50d99SHerbert Xu return segs; 1357f4c50d99SHerbert Xu } 1358f4c50d99SHerbert Xu 135973cc19f1SHerbert Xu static struct sk_buff **inet_gro_receive(struct sk_buff **head, 136073cc19f1SHerbert Xu struct sk_buff *skb) 136173cc19f1SHerbert Xu { 1362bca49f84SVlad Yasevich const struct net_offload *ops; 136373cc19f1SHerbert Xu struct sk_buff **pp = NULL; 136473cc19f1SHerbert Xu struct sk_buff *p; 1365b71d1d42SEric Dumazet const struct iphdr *iph; 1366a5b1cf28SHerbert Xu unsigned int hlen; 1367a5b1cf28SHerbert Xu unsigned int off; 13681075f3f6SHerbert Xu unsigned int id; 136973cc19f1SHerbert Xu int flush = 1; 137073cc19f1SHerbert Xu int proto; 137173cc19f1SHerbert Xu 1372a5b1cf28SHerbert Xu off = skb_gro_offset(skb); 1373a5b1cf28SHerbert Xu hlen = off + sizeof(*iph); 1374a5b1cf28SHerbert Xu iph = skb_gro_header_fast(skb, off); 1375a5b1cf28SHerbert Xu if (skb_gro_header_hard(skb, hlen)) { 1376a5b1cf28SHerbert Xu iph = skb_gro_header_slow(skb, hlen, off); 137786911732SHerbert Xu if (unlikely(!iph)) 137873cc19f1SHerbert Xu goto out; 1379a5b1cf28SHerbert Xu } 138073cc19f1SHerbert Xu 1381f9242b6bSDavid S. Miller proto = iph->protocol; 138273cc19f1SHerbert Xu 138373cc19f1SHerbert Xu rcu_read_lock(); 1384bca49f84SVlad Yasevich ops = rcu_dereference(inet_offloads[proto]); 1385f191a1d1SVlad Yasevich if (!ops || !ops->callbacks.gro_receive) 138673cc19f1SHerbert Xu goto out_unlock; 138773cc19f1SHerbert Xu 1388a5ad24beSHerbert Xu if (*(u8 *)iph != 0x45) 138973cc19f1SHerbert Xu goto out_unlock; 139073cc19f1SHerbert Xu 1391a9e050f4SEric Dumazet if (unlikely(ip_fast_csum((u8 *)iph, 5))) 139273cc19f1SHerbert Xu goto out_unlock; 139373cc19f1SHerbert Xu 13940eae88f3SEric Dumazet id = ntohl(*(__be32 *)&iph->id); 1395db8caf3dSEric Dumazet flush = (u16)((ntohl(*(__be32 *)iph) ^ skb_gro_len(skb)) | (id & ~IP_DF)); 13961075f3f6SHerbert Xu id >>= 16; 139773cc19f1SHerbert Xu 139873cc19f1SHerbert Xu for (p = *head; p; p = p->next) { 139973cc19f1SHerbert Xu struct iphdr *iph2; 140073cc19f1SHerbert Xu 140173cc19f1SHerbert Xu if (!NAPI_GRO_CB(p)->same_flow) 140273cc19f1SHerbert Xu continue; 140373cc19f1SHerbert Xu 140473cc19f1SHerbert Xu iph2 = ip_hdr(p); 140573cc19f1SHerbert Xu 1406a5ad24beSHerbert Xu if ((iph->protocol ^ iph2->protocol) | 14070eae88f3SEric Dumazet ((__force u32)iph->saddr ^ (__force u32)iph2->saddr) | 14080eae88f3SEric Dumazet ((__force u32)iph->daddr ^ (__force u32)iph2->daddr)) { 140973cc19f1SHerbert Xu NAPI_GRO_CB(p)->same_flow = 0; 141073cc19f1SHerbert Xu continue; 141173cc19f1SHerbert Xu } 141273cc19f1SHerbert Xu 141373cc19f1SHerbert Xu /* All fields must match except length and checksum. */ 141473cc19f1SHerbert Xu NAPI_GRO_CB(p)->flush |= 1415a5ad24beSHerbert Xu (iph->ttl ^ iph2->ttl) | 1416a9e050f4SEric Dumazet (iph->tos ^ iph2->tos) | 14175b9b6263SEric Dumazet (__force int)((iph->frag_off ^ iph2->frag_off) & htons(IP_DF)) | 1418a5ad24beSHerbert Xu ((u16)(ntohs(iph2->id) + NAPI_GRO_CB(p)->count) ^ id); 141973cc19f1SHerbert Xu 142073cc19f1SHerbert Xu NAPI_GRO_CB(p)->flush |= flush; 142173cc19f1SHerbert Xu } 142273cc19f1SHerbert Xu 142373cc19f1SHerbert Xu NAPI_GRO_CB(skb)->flush |= flush; 142486911732SHerbert Xu skb_gro_pull(skb, sizeof(*iph)); 142586911732SHerbert Xu skb_set_transport_header(skb, skb_gro_offset(skb)); 142673cc19f1SHerbert Xu 1427f191a1d1SVlad Yasevich pp = ops->callbacks.gro_receive(head, skb); 142873cc19f1SHerbert Xu 142973cc19f1SHerbert Xu out_unlock: 143073cc19f1SHerbert Xu rcu_read_unlock(); 143173cc19f1SHerbert Xu 143273cc19f1SHerbert Xu out: 143373cc19f1SHerbert Xu NAPI_GRO_CB(skb)->flush |= flush; 143473cc19f1SHerbert Xu 143573cc19f1SHerbert Xu return pp; 143673cc19f1SHerbert Xu } 143773cc19f1SHerbert Xu 143873cc19f1SHerbert Xu static int inet_gro_complete(struct sk_buff *skb) 143973cc19f1SHerbert Xu { 144073cc19f1SHerbert Xu __be16 newlen = htons(skb->len - skb_network_offset(skb)); 1441f9242b6bSDavid S. Miller struct iphdr *iph = ip_hdr(skb); 1442bca49f84SVlad Yasevich const struct net_offload *ops; 1443f9242b6bSDavid S. Miller int proto = iph->protocol; 1444f9242b6bSDavid S. Miller int err = -ENOSYS; 144573cc19f1SHerbert Xu 144673cc19f1SHerbert Xu csum_replace2(&iph->check, iph->tot_len, newlen); 144773cc19f1SHerbert Xu iph->tot_len = newlen; 144873cc19f1SHerbert Xu 144973cc19f1SHerbert Xu rcu_read_lock(); 1450bca49f84SVlad Yasevich ops = rcu_dereference(inet_offloads[proto]); 1451f191a1d1SVlad Yasevich if (WARN_ON(!ops || !ops->callbacks.gro_complete)) 145273cc19f1SHerbert Xu goto out_unlock; 145373cc19f1SHerbert Xu 1454f191a1d1SVlad Yasevich err = ops->callbacks.gro_complete(skb); 145573cc19f1SHerbert Xu 145673cc19f1SHerbert Xu out_unlock: 145773cc19f1SHerbert Xu rcu_read_unlock(); 145873cc19f1SHerbert Xu 145973cc19f1SHerbert Xu return err; 146073cc19f1SHerbert Xu } 146173cc19f1SHerbert Xu 1462eee4fe4dSDenis V. Lunev int inet_ctl_sock_create(struct sock **sk, unsigned short family, 14635677242fSDenis V. Lunev unsigned short type, unsigned char protocol, 14645677242fSDenis V. Lunev struct net *net) 14653d58b5faSDenis V. Lunev { 1466eee4fe4dSDenis V. Lunev struct socket *sock; 1467eee4fe4dSDenis V. Lunev int rc = sock_create_kern(family, type, protocol, &sock); 14683d58b5faSDenis V. Lunev 14693d58b5faSDenis V. Lunev if (rc == 0) { 1470eee4fe4dSDenis V. Lunev *sk = sock->sk; 1471eee4fe4dSDenis V. Lunev (*sk)->sk_allocation = GFP_ATOMIC; 14723d58b5faSDenis V. Lunev /* 14733d58b5faSDenis V. Lunev * Unhash it so that IP input processing does not even see it, 14743d58b5faSDenis V. Lunev * we do not wish this socket to see incoming packets. 14753d58b5faSDenis V. Lunev */ 1476eee4fe4dSDenis V. Lunev (*sk)->sk_prot->unhash(*sk); 14775677242fSDenis V. Lunev 14785677242fSDenis V. Lunev sk_change_net(*sk, net); 14793d58b5faSDenis V. Lunev } 14803d58b5faSDenis V. Lunev return rc; 14813d58b5faSDenis V. Lunev } 14823d58b5faSDenis V. Lunev EXPORT_SYMBOL_GPL(inet_ctl_sock_create); 14833d58b5faSDenis V. Lunev 14847d720c3eSTejun Heo unsigned long snmp_fold_field(void __percpu *mib[], int offt) 14855e0f0435SHerbert Xu { 14865e0f0435SHerbert Xu unsigned long res = 0; 14878f0ea0feSEric Dumazet int i, j; 14885e0f0435SHerbert Xu 14895e0f0435SHerbert Xu for_each_possible_cpu(i) { 14908f0ea0feSEric Dumazet for (j = 0; j < SNMP_ARRAY_SZ; j++) 14918f0ea0feSEric Dumazet res += *(((unsigned long *) per_cpu_ptr(mib[j], i)) + offt); 14925e0f0435SHerbert Xu } 14935e0f0435SHerbert Xu return res; 14945e0f0435SHerbert Xu } 14955e0f0435SHerbert Xu EXPORT_SYMBOL_GPL(snmp_fold_field); 14965e0f0435SHerbert Xu 14974ce3c183SEric Dumazet #if BITS_PER_LONG==32 14984ce3c183SEric Dumazet 14994ce3c183SEric Dumazet u64 snmp_fold_field64(void __percpu *mib[], int offt, size_t syncp_offset) 15004ce3c183SEric Dumazet { 15014ce3c183SEric Dumazet u64 res = 0; 15024ce3c183SEric Dumazet int cpu; 15034ce3c183SEric Dumazet 15044ce3c183SEric Dumazet for_each_possible_cpu(cpu) { 15058f0ea0feSEric Dumazet void *bhptr; 15064ce3c183SEric Dumazet struct u64_stats_sync *syncp; 15078f0ea0feSEric Dumazet u64 v; 15084ce3c183SEric Dumazet unsigned int start; 15094ce3c183SEric Dumazet 15108f0ea0feSEric Dumazet bhptr = per_cpu_ptr(mib[0], cpu); 15114ce3c183SEric Dumazet syncp = (struct u64_stats_sync *)(bhptr + syncp_offset); 15124ce3c183SEric Dumazet do { 15134ce3c183SEric Dumazet start = u64_stats_fetch_begin_bh(syncp); 15148f0ea0feSEric Dumazet v = *(((u64 *) bhptr) + offt); 15154ce3c183SEric Dumazet } while (u64_stats_fetch_retry_bh(syncp, start)); 15164ce3c183SEric Dumazet 15178f0ea0feSEric Dumazet res += v; 15184ce3c183SEric Dumazet } 15194ce3c183SEric Dumazet return res; 15204ce3c183SEric Dumazet } 15214ce3c183SEric Dumazet EXPORT_SYMBOL_GPL(snmp_fold_field64); 15224ce3c183SEric Dumazet #endif 15234ce3c183SEric Dumazet 15241823e4c8SEric Dumazet int snmp_mib_init(void __percpu *ptr[2], size_t mibsize, size_t align) 15255e0f0435SHerbert Xu { 15265e0f0435SHerbert Xu BUG_ON(ptr == NULL); 15271823e4c8SEric Dumazet ptr[0] = __alloc_percpu(mibsize, align); 15285e0f0435SHerbert Xu if (!ptr[0]) 15298f0ea0feSEric Dumazet return -ENOMEM; 15308f0ea0feSEric Dumazet #if SNMP_ARRAY_SZ == 2 15311823e4c8SEric Dumazet ptr[1] = __alloc_percpu(mibsize, align); 15328f0ea0feSEric Dumazet if (!ptr[1]) { 15335e0f0435SHerbert Xu free_percpu(ptr[0]); 15345e0f0435SHerbert Xu ptr[0] = NULL; 15355e0f0435SHerbert Xu return -ENOMEM; 15365e0f0435SHerbert Xu } 15378f0ea0feSEric Dumazet #endif 15388f0ea0feSEric Dumazet return 0; 15398f0ea0feSEric Dumazet } 15405e0f0435SHerbert Xu EXPORT_SYMBOL_GPL(snmp_mib_init); 15415e0f0435SHerbert Xu 15421da177e4SLinus Torvalds #ifdef CONFIG_IP_MULTICAST 154332613090SAlexey Dobriyan static const struct net_protocol igmp_protocol = { 15441da177e4SLinus Torvalds .handler = igmp_rcv, 1545b4ee07dfSAlexey Dobriyan .netns_ok = 1, 15461da177e4SLinus Torvalds }; 15471da177e4SLinus Torvalds #endif 15481da177e4SLinus Torvalds 154932613090SAlexey Dobriyan static const struct net_protocol tcp_protocol = { 155041063e9dSDavid S. Miller .early_demux = tcp_v4_early_demux, 15511da177e4SLinus Torvalds .handler = tcp_v4_rcv, 15521da177e4SLinus Torvalds .err_handler = tcp_v4_err, 15531da177e4SLinus Torvalds .no_policy = 1, 155492f1fecbSDenis V. Lunev .netns_ok = 1, 15551da177e4SLinus Torvalds }; 15561da177e4SLinus Torvalds 155732613090SAlexey Dobriyan static const struct net_protocol udp_protocol = { 1558421b3885SShawn Bohrer .early_demux = udp_v4_early_demux, 15591da177e4SLinus Torvalds .handler = udp_rcv, 15601da177e4SLinus Torvalds .err_handler = udp_err, 15611da177e4SLinus Torvalds .no_policy = 1, 156292f1fecbSDenis V. Lunev .netns_ok = 1, 15631da177e4SLinus Torvalds }; 15641da177e4SLinus Torvalds 156532613090SAlexey Dobriyan static const struct net_protocol icmp_protocol = { 15661da177e4SLinus Torvalds .handler = icmp_rcv, 15675b052042SLi Wei .err_handler = icmp_err, 15688b7817f3SHerbert Xu .no_policy = 1, 156992f1fecbSDenis V. Lunev .netns_ok = 1, 15701da177e4SLinus Torvalds }; 15711da177e4SLinus Torvalds 15729b4661bdSPavel Emelyanov static __net_init int ipv4_mib_init_net(struct net *net) 15739b4661bdSPavel Emelyanov { 15747d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.tcp_statistics, 15751823e4c8SEric Dumazet sizeof(struct tcp_mib), 15761823e4c8SEric Dumazet __alignof__(struct tcp_mib)) < 0) 157757ef42d5SPavel Emelyanov goto err_tcp_mib; 15787d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.ip_statistics, 15791823e4c8SEric Dumazet sizeof(struct ipstats_mib), 15801823e4c8SEric Dumazet __alignof__(struct ipstats_mib)) < 0) 1581a20f5799SPavel Emelyanov goto err_ip_mib; 15827d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.net_statistics, 15831823e4c8SEric Dumazet sizeof(struct linux_mib), 15841823e4c8SEric Dumazet __alignof__(struct linux_mib)) < 0) 158561a7e260SPavel Emelyanov goto err_net_mib; 15867d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.udp_statistics, 15871823e4c8SEric Dumazet sizeof(struct udp_mib), 15881823e4c8SEric Dumazet __alignof__(struct udp_mib)) < 0) 15892f275f91SPavel Emelyanov goto err_udp_mib; 15907d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.udplite_statistics, 15911823e4c8SEric Dumazet sizeof(struct udp_mib), 15921823e4c8SEric Dumazet __alignof__(struct udp_mib)) < 0) 1593386019d3SPavel Emelyanov goto err_udplite_mib; 15947d720c3eSTejun Heo if (snmp_mib_init((void __percpu **)net->mib.icmp_statistics, 15951823e4c8SEric Dumazet sizeof(struct icmp_mib), 15961823e4c8SEric Dumazet __alignof__(struct icmp_mib)) < 0) 1597b60538a0SPavel Emelyanov goto err_icmp_mib; 1598acb32ba3SEric Dumazet net->mib.icmpmsg_statistics = kzalloc(sizeof(struct icmpmsg_mib), 1599acb32ba3SEric Dumazet GFP_KERNEL); 1600acb32ba3SEric Dumazet if (!net->mib.icmpmsg_statistics) 1601923c6586SPavel Emelyanov goto err_icmpmsg_mib; 160257ef42d5SPavel Emelyanov 160357ef42d5SPavel Emelyanov tcp_mib_init(net); 16049b4661bdSPavel Emelyanov return 0; 160557ef42d5SPavel Emelyanov 1606923c6586SPavel Emelyanov err_icmpmsg_mib: 16077d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.icmp_statistics); 1608b60538a0SPavel Emelyanov err_icmp_mib: 16097d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.udplite_statistics); 1610386019d3SPavel Emelyanov err_udplite_mib: 16117d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.udp_statistics); 16122f275f91SPavel Emelyanov err_udp_mib: 16137d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.net_statistics); 161461a7e260SPavel Emelyanov err_net_mib: 16157d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.ip_statistics); 1616a20f5799SPavel Emelyanov err_ip_mib: 16177d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.tcp_statistics); 161857ef42d5SPavel Emelyanov err_tcp_mib: 161957ef42d5SPavel Emelyanov return -ENOMEM; 16209b4661bdSPavel Emelyanov } 16219b4661bdSPavel Emelyanov 16229b4661bdSPavel Emelyanov static __net_exit void ipv4_mib_exit_net(struct net *net) 16239b4661bdSPavel Emelyanov { 1624acb32ba3SEric Dumazet kfree(net->mib.icmpmsg_statistics); 16257d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.icmp_statistics); 16267d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.udplite_statistics); 16277d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.udp_statistics); 16287d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.net_statistics); 16297d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.ip_statistics); 16307d720c3eSTejun Heo snmp_mib_free((void __percpu **)net->mib.tcp_statistics); 16319b4661bdSPavel Emelyanov } 16329b4661bdSPavel Emelyanov 16339b4661bdSPavel Emelyanov static __net_initdata struct pernet_operations ipv4_mib_ops = { 16349b4661bdSPavel Emelyanov .init = ipv4_mib_init_net, 16359b4661bdSPavel Emelyanov .exit = ipv4_mib_exit_net, 16369b4661bdSPavel Emelyanov }; 16379b4661bdSPavel Emelyanov 16381da177e4SLinus Torvalds static int __init init_ipv4_mibs(void) 16391da177e4SLinus Torvalds { 1640d89cbbb1SPavel Emelyanov return register_pernet_subsys(&ipv4_mib_ops); 16411da177e4SLinus Torvalds } 16421da177e4SLinus Torvalds 16431da177e4SLinus Torvalds static int ipv4_proc_init(void); 16441da177e4SLinus Torvalds 164530e224d7SHerbert Xu /* 164630e224d7SHerbert Xu * IP protocol layer initialiser 164730e224d7SHerbert Xu */ 164830e224d7SHerbert Xu 164922061d80SVlad Yasevich static struct packet_offload ip_packet_offload __read_mostly = { 165022061d80SVlad Yasevich .type = cpu_to_be16(ETH_P_IP), 1651f191a1d1SVlad Yasevich .callbacks = { 1652a430a43dSHerbert Xu .gso_send_check = inet_gso_send_check, 1653f4c50d99SHerbert Xu .gso_segment = inet_gso_segment, 165473cc19f1SHerbert Xu .gro_receive = inet_gro_receive, 165573cc19f1SHerbert Xu .gro_complete = inet_gro_complete, 1656f191a1d1SVlad Yasevich }, 165730e224d7SHerbert Xu }; 165830e224d7SHerbert Xu 1659808a8f88SVlad Yasevich static int __init ipv4_offload_init(void) 1660808a8f88SVlad Yasevich { 1661808a8f88SVlad Yasevich /* 1662808a8f88SVlad Yasevich * Add offloads 1663808a8f88SVlad Yasevich */ 1664da5bab07SDaniel Borkmann if (udpv4_offload_init() < 0) 1665808a8f88SVlad Yasevich pr_crit("%s: Cannot add UDP protocol offload\n", __func__); 166628850dc7SDaniel Borkmann if (tcpv4_offload_init() < 0) 166728850dc7SDaniel Borkmann pr_crit("%s: Cannot add TCP protocol offload\n", __func__); 1668808a8f88SVlad Yasevich 1669808a8f88SVlad Yasevich dev_add_offload(&ip_packet_offload); 1670808a8f88SVlad Yasevich return 0; 1671808a8f88SVlad Yasevich } 1672808a8f88SVlad Yasevich 1673808a8f88SVlad Yasevich fs_initcall(ipv4_offload_init); 1674808a8f88SVlad Yasevich 1675808a8f88SVlad Yasevich static struct packet_type ip_packet_type __read_mostly = { 1676808a8f88SVlad Yasevich .type = cpu_to_be16(ETH_P_IP), 1677808a8f88SVlad Yasevich .func = ip_rcv, 1678808a8f88SVlad Yasevich }; 1679808a8f88SVlad Yasevich 16801da177e4SLinus Torvalds static int __init inet_init(void) 16811da177e4SLinus Torvalds { 16821da177e4SLinus Torvalds struct inet_protosw *q; 16831da177e4SLinus Torvalds struct list_head *r; 16841da177e4SLinus Torvalds int rc = -EINVAL; 16851da177e4SLinus Torvalds 168695c7e0e4SYOSHIFUJI Hideaki / 吉藤英明 BUILD_BUG_ON(sizeof(struct inet_skb_parm) > FIELD_SIZEOF(struct sk_buff, cb)); 16871da177e4SLinus Torvalds 1688e3826f1eSAmerigo Wang sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL); 1689e3826f1eSAmerigo Wang if (!sysctl_local_reserved_ports) 1690e3826f1eSAmerigo Wang goto out; 1691e3826f1eSAmerigo Wang 16921da177e4SLinus Torvalds rc = proto_register(&tcp_prot, 1); 16931da177e4SLinus Torvalds if (rc) 1694e3826f1eSAmerigo Wang goto out_free_reserved_ports; 16951da177e4SLinus Torvalds 16961da177e4SLinus Torvalds rc = proto_register(&udp_prot, 1); 16971da177e4SLinus Torvalds if (rc) 16981da177e4SLinus Torvalds goto out_unregister_tcp_proto; 16991da177e4SLinus Torvalds 17001da177e4SLinus Torvalds rc = proto_register(&raw_prot, 1); 17011da177e4SLinus Torvalds if (rc) 17021da177e4SLinus Torvalds goto out_unregister_udp_proto; 17031da177e4SLinus Torvalds 1704c319b4d7SVasiliy Kulikov rc = proto_register(&ping_prot, 1); 1705c319b4d7SVasiliy Kulikov if (rc) 1706c319b4d7SVasiliy Kulikov goto out_unregister_raw_proto; 1707c319b4d7SVasiliy Kulikov 17081da177e4SLinus Torvalds /* 17091da177e4SLinus Torvalds * Tell SOCKET that we are alive... 17101da177e4SLinus Torvalds */ 17111da177e4SLinus Torvalds 17121da177e4SLinus Torvalds (void)sock_register(&inet_family_ops); 17131da177e4SLinus Torvalds 1714bd7b1533SAl Viro #ifdef CONFIG_SYSCTL 1715bd7b1533SAl Viro ip_static_sysctl_init(); 1716bd7b1533SAl Viro #endif 1717bd7b1533SAl Viro 17183dc43e3eSGlauber Costa tcp_prot.sysctl_mem = init_net.ipv4.sysctl_tcp_mem; 17193dc43e3eSGlauber Costa 17201da177e4SLinus Torvalds /* 17211da177e4SLinus Torvalds * Add all the base protocols. 17221da177e4SLinus Torvalds */ 17231da177e4SLinus Torvalds 17241da177e4SLinus Torvalds if (inet_add_protocol(&icmp_protocol, IPPROTO_ICMP) < 0) 1725058bd4d2SJoe Perches pr_crit("%s: Cannot add ICMP protocol\n", __func__); 17261da177e4SLinus Torvalds if (inet_add_protocol(&udp_protocol, IPPROTO_UDP) < 0) 1727058bd4d2SJoe Perches pr_crit("%s: Cannot add UDP protocol\n", __func__); 17281da177e4SLinus Torvalds if (inet_add_protocol(&tcp_protocol, IPPROTO_TCP) < 0) 1729058bd4d2SJoe Perches pr_crit("%s: Cannot add TCP protocol\n", __func__); 17301da177e4SLinus Torvalds #ifdef CONFIG_IP_MULTICAST 17311da177e4SLinus Torvalds if (inet_add_protocol(&igmp_protocol, IPPROTO_IGMP) < 0) 1732058bd4d2SJoe Perches pr_crit("%s: Cannot add IGMP protocol\n", __func__); 17331da177e4SLinus Torvalds #endif 17341da177e4SLinus Torvalds 17351da177e4SLinus Torvalds /* Register the socket-side information for inet_create. */ 17361da177e4SLinus Torvalds for (r = &inetsw[0]; r < &inetsw[SOCK_MAX]; ++r) 17371da177e4SLinus Torvalds INIT_LIST_HEAD(r); 17381da177e4SLinus Torvalds 17391da177e4SLinus Torvalds for (q = inetsw_array; q < &inetsw_array[INETSW_ARRAY_LEN]; ++q) 17401da177e4SLinus Torvalds inet_register_protosw(q); 17411da177e4SLinus Torvalds 17421da177e4SLinus Torvalds /* 17431da177e4SLinus Torvalds * Set the ARP module up 17441da177e4SLinus Torvalds */ 17451da177e4SLinus Torvalds 17461da177e4SLinus Torvalds arp_init(); 17471da177e4SLinus Torvalds 17481da177e4SLinus Torvalds /* 17491da177e4SLinus Torvalds * Set the IP module up 17501da177e4SLinus Torvalds */ 17511da177e4SLinus Torvalds 17521da177e4SLinus Torvalds ip_init(); 17531da177e4SLinus Torvalds 17549b0f976fSDenis V. Lunev tcp_v4_init(); 17551da177e4SLinus Torvalds 17561da177e4SLinus Torvalds /* Setup TCP slab cache for open requests. */ 17571da177e4SLinus Torvalds tcp_init(); 17581da177e4SLinus Torvalds 175995766fffSHideo Aoki /* Setup UDP memory threshold */ 176095766fffSHideo Aoki udp_init(); 176195766fffSHideo Aoki 1762ba4e58ecSGerrit Renker /* Add UDP-Lite (RFC 3828) */ 1763ba4e58ecSGerrit Renker udplite4_register(); 17641da177e4SLinus Torvalds 1765c319b4d7SVasiliy Kulikov ping_init(); 1766c319b4d7SVasiliy Kulikov 17671da177e4SLinus Torvalds /* 17681da177e4SLinus Torvalds * Set the ICMP layer up 17691da177e4SLinus Torvalds */ 17701da177e4SLinus Torvalds 1771a5710d65SDenis V. Lunev if (icmp_init() < 0) 1772a5710d65SDenis V. Lunev panic("Failed to create the ICMP control socket.\n"); 17731da177e4SLinus Torvalds 17741da177e4SLinus Torvalds /* 17751da177e4SLinus Torvalds * Initialise the multicast router 17761da177e4SLinus Torvalds */ 17771da177e4SLinus Torvalds #if defined(CONFIG_IP_MROUTE) 177803d2f897SWang Chen if (ip_mr_init()) 1779058bd4d2SJoe Perches pr_crit("%s: Cannot init ipv4 mroute\n", __func__); 17801da177e4SLinus Torvalds #endif 17811da177e4SLinus Torvalds /* 17821da177e4SLinus Torvalds * Initialise per-cpu ipv4 mibs 17831da177e4SLinus Torvalds */ 17841da177e4SLinus Torvalds 17851da177e4SLinus Torvalds if (init_ipv4_mibs()) 1786058bd4d2SJoe Perches pr_crit("%s: Cannot init ipv4 mibs\n", __func__); 17871da177e4SLinus Torvalds 17881da177e4SLinus Torvalds ipv4_proc_init(); 17891da177e4SLinus Torvalds 17901da177e4SLinus Torvalds ipfrag_init(); 17911da177e4SLinus Torvalds 179230e224d7SHerbert Xu dev_add_pack(&ip_packet_type); 179330e224d7SHerbert Xu 17941da177e4SLinus Torvalds rc = 0; 17951da177e4SLinus Torvalds out: 17961da177e4SLinus Torvalds return rc; 1797c319b4d7SVasiliy Kulikov out_unregister_raw_proto: 1798c319b4d7SVasiliy Kulikov proto_unregister(&raw_prot); 17991da177e4SLinus Torvalds out_unregister_udp_proto: 18001da177e4SLinus Torvalds proto_unregister(&udp_prot); 1801321efff7SOlaf Kirch out_unregister_tcp_proto: 1802321efff7SOlaf Kirch proto_unregister(&tcp_prot); 1803e3826f1eSAmerigo Wang out_free_reserved_ports: 1804e3826f1eSAmerigo Wang kfree(sysctl_local_reserved_ports); 18051da177e4SLinus Torvalds goto out; 18061da177e4SLinus Torvalds } 18071da177e4SLinus Torvalds 1808a536e077SHeiko Carstens fs_initcall(inet_init); 18091da177e4SLinus Torvalds 18101da177e4SLinus Torvalds /* ------------------------------------------------------------------------ */ 18111da177e4SLinus Torvalds 18121da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 18131da177e4SLinus Torvalds static int __init ipv4_proc_init(void) 18141da177e4SLinus Torvalds { 18151da177e4SLinus Torvalds int rc = 0; 18161da177e4SLinus Torvalds 18171da177e4SLinus Torvalds if (raw_proc_init()) 18181da177e4SLinus Torvalds goto out_raw; 18191da177e4SLinus Torvalds if (tcp4_proc_init()) 18201da177e4SLinus Torvalds goto out_tcp; 18211da177e4SLinus Torvalds if (udp4_proc_init()) 18221da177e4SLinus Torvalds goto out_udp; 1823c319b4d7SVasiliy Kulikov if (ping_proc_init()) 1824c319b4d7SVasiliy Kulikov goto out_ping; 18251da177e4SLinus Torvalds if (ip_misc_proc_init()) 18261da177e4SLinus Torvalds goto out_misc; 18271da177e4SLinus Torvalds out: 18281da177e4SLinus Torvalds return rc; 18291da177e4SLinus Torvalds out_misc: 1830c319b4d7SVasiliy Kulikov ping_proc_exit(); 1831c319b4d7SVasiliy Kulikov out_ping: 18321da177e4SLinus Torvalds udp4_proc_exit(); 18331da177e4SLinus Torvalds out_udp: 18341da177e4SLinus Torvalds tcp4_proc_exit(); 18351da177e4SLinus Torvalds out_tcp: 18361da177e4SLinus Torvalds raw_proc_exit(); 18371da177e4SLinus Torvalds out_raw: 18381da177e4SLinus Torvalds rc = -ENOMEM; 18391da177e4SLinus Torvalds goto out; 18401da177e4SLinus Torvalds } 18411da177e4SLinus Torvalds 18421da177e4SLinus Torvalds #else /* CONFIG_PROC_FS */ 18431da177e4SLinus Torvalds static int __init ipv4_proc_init(void) 18441da177e4SLinus Torvalds { 18451da177e4SLinus Torvalds return 0; 18461da177e4SLinus Torvalds } 18471da177e4SLinus Torvalds #endif /* CONFIG_PROC_FS */ 18481da177e4SLinus Torvalds 18491da177e4SLinus Torvalds MODULE_ALIAS_NETPROTO(PF_INET); 18501da177e4SLinus Torvalds 1851