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 68f4c50d99SHerbert Xu #include <linux/err.h> 691da177e4SLinus Torvalds #include <linux/errno.h> 701da177e4SLinus Torvalds #include <linux/types.h> 711da177e4SLinus Torvalds #include <linux/socket.h> 721da177e4SLinus Torvalds #include <linux/in.h> 731da177e4SLinus Torvalds #include <linux/kernel.h> 741da177e4SLinus Torvalds #include <linux/module.h> 751da177e4SLinus Torvalds #include <linux/sched.h> 761da177e4SLinus Torvalds #include <linux/timer.h> 771da177e4SLinus Torvalds #include <linux/string.h> 781da177e4SLinus Torvalds #include <linux/sockios.h> 791da177e4SLinus Torvalds #include <linux/net.h> 804fc268d2SRandy Dunlap #include <linux/capability.h> 811da177e4SLinus Torvalds #include <linux/fcntl.h> 821da177e4SLinus Torvalds #include <linux/mm.h> 831da177e4SLinus Torvalds #include <linux/interrupt.h> 841da177e4SLinus Torvalds #include <linux/stat.h> 851da177e4SLinus Torvalds #include <linux/init.h> 861da177e4SLinus Torvalds #include <linux/poll.h> 871da177e4SLinus Torvalds #include <linux/netfilter_ipv4.h> 88b3da2cf3SDavid S. Miller #include <linux/random.h> 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds #include <asm/uaccess.h> 911da177e4SLinus Torvalds #include <asm/system.h> 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds #include <linux/inet.h> 941da177e4SLinus Torvalds #include <linux/igmp.h> 9514c85021SArnaldo Carvalho de Melo #include <linux/inetdevice.h> 961da177e4SLinus Torvalds #include <linux/netdevice.h> 9773cc19f1SHerbert Xu #include <net/checksum.h> 981da177e4SLinus Torvalds #include <net/ip.h> 991da177e4SLinus Torvalds #include <net/protocol.h> 1001da177e4SLinus Torvalds #include <net/arp.h> 1011da177e4SLinus Torvalds #include <net/route.h> 1021da177e4SLinus Torvalds #include <net/ip_fib.h> 103295f7324SArnaldo Carvalho de Melo #include <net/inet_connection_sock.h> 1041da177e4SLinus Torvalds #include <net/tcp.h> 1051da177e4SLinus Torvalds #include <net/udp.h> 106ba4e58ecSGerrit Renker #include <net/udplite.h> 1071da177e4SLinus Torvalds #include <linux/skbuff.h> 1081da177e4SLinus Torvalds #include <net/sock.h> 1091da177e4SLinus Torvalds #include <net/raw.h> 1101da177e4SLinus Torvalds #include <net/icmp.h> 1111da177e4SLinus Torvalds #include <net/ipip.h> 1121da177e4SLinus Torvalds #include <net/inet_common.h> 1131da177e4SLinus Torvalds #include <net/xfrm.h> 1149b4661bdSPavel Emelyanov #include <net/net_namespace.h> 1151da177e4SLinus Torvalds #ifdef CONFIG_IP_MROUTE 1161da177e4SLinus Torvalds #include <linux/mroute.h> 1171da177e4SLinus Torvalds #endif 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds extern void ip_mc_drop_socket(struct sock *sk); 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds /* The inetsw table contains everything that inet_create needs to 1221da177e4SLinus Torvalds * build a new socket. 1231da177e4SLinus Torvalds */ 1241da177e4SLinus Torvalds static struct list_head inetsw[SOCK_MAX]; 1251da177e4SLinus Torvalds static DEFINE_SPINLOCK(inetsw_lock); 1261da177e4SLinus Torvalds 1279ba63979SPavel Emelyanov struct ipv4_config ipv4_config; 1289ba63979SPavel Emelyanov 1299ba63979SPavel Emelyanov EXPORT_SYMBOL(ipv4_config); 1309ba63979SPavel Emelyanov 1311da177e4SLinus Torvalds /* New destruction routine */ 1321da177e4SLinus Torvalds 1331da177e4SLinus Torvalds void inet_sock_destruct(struct sock *sk) 1341da177e4SLinus Torvalds { 1351da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 1361da177e4SLinus Torvalds 1371da177e4SLinus Torvalds __skb_queue_purge(&sk->sk_receive_queue); 1381da177e4SLinus Torvalds __skb_queue_purge(&sk->sk_error_queue); 1391da177e4SLinus Torvalds 14095766fffSHideo Aoki sk_mem_reclaim(sk); 14195766fffSHideo Aoki 1421da177e4SLinus Torvalds if (sk->sk_type == SOCK_STREAM && sk->sk_state != TCP_CLOSE) { 1431da177e4SLinus Torvalds printk("Attempt to release TCP socket in state %d %p\n", 1441da177e4SLinus Torvalds sk->sk_state, sk); 1451da177e4SLinus Torvalds return; 1461da177e4SLinus Torvalds } 1471da177e4SLinus Torvalds if (!sock_flag(sk, SOCK_DEAD)) { 1481da177e4SLinus Torvalds printk("Attempt to release alive inet socket %p\n", sk); 1491da177e4SLinus Torvalds return; 1501da177e4SLinus Torvalds } 1511da177e4SLinus Torvalds 152547b792cSIlpo Järvinen WARN_ON(atomic_read(&sk->sk_rmem_alloc)); 153547b792cSIlpo Järvinen WARN_ON(atomic_read(&sk->sk_wmem_alloc)); 154547b792cSIlpo Järvinen WARN_ON(sk->sk_wmem_queued); 155547b792cSIlpo Järvinen WARN_ON(sk->sk_forward_alloc); 1561da177e4SLinus Torvalds 1571da177e4SLinus Torvalds kfree(inet->opt); 1581da177e4SLinus Torvalds dst_release(sk->sk_dst_cache); 159e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_dec(sk); 1601da177e4SLinus Torvalds } 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvalds /* 1631da177e4SLinus Torvalds * The routines beyond this point handle the behaviour of an AF_INET 1641da177e4SLinus Torvalds * socket object. Mostly it punts to the subprotocols of IP to do 1651da177e4SLinus Torvalds * the work. 1661da177e4SLinus Torvalds */ 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds /* 1691da177e4SLinus Torvalds * Automatically bind an unbound socket. 1701da177e4SLinus Torvalds */ 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds static int inet_autobind(struct sock *sk) 1731da177e4SLinus Torvalds { 1741da177e4SLinus Torvalds struct inet_sock *inet; 1751da177e4SLinus Torvalds /* We may need to bind the socket. */ 1761da177e4SLinus Torvalds lock_sock(sk); 1771da177e4SLinus Torvalds inet = inet_sk(sk); 1781da177e4SLinus Torvalds if (!inet->num) { 1791da177e4SLinus Torvalds if (sk->sk_prot->get_port(sk, 0)) { 1801da177e4SLinus Torvalds release_sock(sk); 1811da177e4SLinus Torvalds return -EAGAIN; 1821da177e4SLinus Torvalds } 1831da177e4SLinus Torvalds inet->sport = htons(inet->num); 1841da177e4SLinus Torvalds } 1851da177e4SLinus Torvalds release_sock(sk); 1861da177e4SLinus Torvalds return 0; 1871da177e4SLinus Torvalds } 1881da177e4SLinus Torvalds 1891da177e4SLinus Torvalds /* 1901da177e4SLinus Torvalds * Move a socket into listening state. 1911da177e4SLinus Torvalds */ 1921da177e4SLinus Torvalds int inet_listen(struct socket *sock, int backlog) 1931da177e4SLinus Torvalds { 1941da177e4SLinus Torvalds struct sock *sk = sock->sk; 1951da177e4SLinus Torvalds unsigned char old_state; 1961da177e4SLinus Torvalds int err; 1971da177e4SLinus Torvalds 1981da177e4SLinus Torvalds lock_sock(sk); 1991da177e4SLinus Torvalds 2001da177e4SLinus Torvalds err = -EINVAL; 2011da177e4SLinus Torvalds if (sock->state != SS_UNCONNECTED || sock->type != SOCK_STREAM) 2021da177e4SLinus Torvalds goto out; 2031da177e4SLinus Torvalds 2041da177e4SLinus Torvalds old_state = sk->sk_state; 2051da177e4SLinus Torvalds if (!((1 << old_state) & (TCPF_CLOSE | TCPF_LISTEN))) 2061da177e4SLinus Torvalds goto out; 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds /* Really, if the socket is already in listen state 2091da177e4SLinus Torvalds * we can only allow the backlog to be adjusted. 2101da177e4SLinus Torvalds */ 2111da177e4SLinus Torvalds if (old_state != TCP_LISTEN) { 21272a3effaSEric Dumazet err = inet_csk_listen_start(sk, backlog); 2131da177e4SLinus Torvalds if (err) 2141da177e4SLinus Torvalds goto out; 2151da177e4SLinus Torvalds } 2161da177e4SLinus Torvalds sk->sk_max_ack_backlog = backlog; 2171da177e4SLinus Torvalds err = 0; 2181da177e4SLinus Torvalds 2191da177e4SLinus Torvalds out: 2201da177e4SLinus Torvalds release_sock(sk); 2211da177e4SLinus Torvalds return err; 2221da177e4SLinus Torvalds } 2231da177e4SLinus Torvalds 224be776281SEric Dumazet u32 inet_ehash_secret __read_mostly; 225b3da2cf3SDavid S. Miller EXPORT_SYMBOL(inet_ehash_secret); 226b3da2cf3SDavid S. Miller 227be776281SEric Dumazet /* 228be776281SEric Dumazet * inet_ehash_secret must be set exactly once 229be776281SEric Dumazet * Instead of using a dedicated spinlock, we (ab)use inetsw_lock 230be776281SEric Dumazet */ 231b3da2cf3SDavid S. Miller void build_ehash_secret(void) 232b3da2cf3SDavid S. Miller { 233be776281SEric Dumazet u32 rnd; 234be776281SEric Dumazet do { 235be776281SEric Dumazet get_random_bytes(&rnd, sizeof(rnd)); 236be776281SEric Dumazet } while (rnd == 0); 237be776281SEric Dumazet spin_lock_bh(&inetsw_lock); 238be776281SEric Dumazet if (!inet_ehash_secret) 239be776281SEric Dumazet inet_ehash_secret = rnd; 240be776281SEric Dumazet spin_unlock_bh(&inetsw_lock); 241b3da2cf3SDavid S. Miller } 242b3da2cf3SDavid S. Miller EXPORT_SYMBOL(build_ehash_secret); 243b3da2cf3SDavid S. Miller 2442342fd7eSDenis V. Lunev static inline int inet_netns_ok(struct net *net, int protocol) 2452342fd7eSDenis V. Lunev { 2462342fd7eSDenis V. Lunev int hash; 2472342fd7eSDenis V. Lunev struct net_protocol *ipprot; 2482342fd7eSDenis V. Lunev 24904f258ceSEric Dumazet if (net_eq(net, &init_net)) 2502342fd7eSDenis V. Lunev return 1; 2512342fd7eSDenis V. Lunev 2522342fd7eSDenis V. Lunev hash = protocol & (MAX_INET_PROTOS - 1); 2532342fd7eSDenis V. Lunev ipprot = rcu_dereference(inet_protos[hash]); 2542342fd7eSDenis V. Lunev 2552342fd7eSDenis V. Lunev if (ipprot == NULL) 2562342fd7eSDenis V. Lunev /* raw IP is OK */ 2572342fd7eSDenis V. Lunev return 1; 2582342fd7eSDenis V. Lunev return ipprot->netns_ok; 2592342fd7eSDenis V. Lunev } 2602342fd7eSDenis V. Lunev 2611da177e4SLinus Torvalds /* 2621da177e4SLinus Torvalds * Create an inet socket. 2631da177e4SLinus Torvalds */ 2641da177e4SLinus Torvalds 2651b8d7ae4SEric W. Biederman static int inet_create(struct net *net, struct socket *sock, int protocol) 2661da177e4SLinus Torvalds { 2671da177e4SLinus Torvalds struct sock *sk; 2681da177e4SLinus Torvalds struct inet_protosw *answer; 2691da177e4SLinus Torvalds struct inet_sock *inet; 2701da177e4SLinus Torvalds struct proto *answer_prot; 2711da177e4SLinus Torvalds unsigned char answer_flags; 2721da177e4SLinus Torvalds char answer_no_check; 273bb97d31fSArnaldo Carvalho de Melo int try_loading_module = 0; 27486c8f9d1SHerbert Xu int err; 2751da177e4SLinus Torvalds 27604f258ceSEric Dumazet if (unlikely(!inet_ehash_secret)) 27704f258ceSEric Dumazet if (sock->type != SOCK_RAW && sock->type != SOCK_DGRAM) 278b3da2cf3SDavid S. Miller build_ehash_secret(); 279b3da2cf3SDavid S. Miller 2801da177e4SLinus Torvalds sock->state = SS_UNCONNECTED; 2811da177e4SLinus Torvalds 2821da177e4SLinus Torvalds /* Look for the requested type/protocol pair. */ 283bb97d31fSArnaldo Carvalho de Melo lookup_protocol: 28486c8f9d1SHerbert Xu err = -ESOCKTNOSUPPORT; 2851da177e4SLinus Torvalds rcu_read_lock(); 286696adfe8SPaul E. McKenney list_for_each_entry_rcu(answer, &inetsw[sock->type], list) { 2871da177e4SLinus Torvalds 288696adfe8SPaul E. McKenney err = 0; 2891da177e4SLinus Torvalds /* Check the non-wild match. */ 2901da177e4SLinus Torvalds if (protocol == answer->protocol) { 2911da177e4SLinus Torvalds if (protocol != IPPROTO_IP) 2921da177e4SLinus Torvalds break; 2931da177e4SLinus Torvalds } else { 2941da177e4SLinus Torvalds /* Check for the two wild cases. */ 2951da177e4SLinus Torvalds if (IPPROTO_IP == protocol) { 2961da177e4SLinus Torvalds protocol = answer->protocol; 2971da177e4SLinus Torvalds break; 2981da177e4SLinus Torvalds } 2991da177e4SLinus Torvalds if (IPPROTO_IP == answer->protocol) 3001da177e4SLinus Torvalds break; 3011da177e4SLinus Torvalds } 30286c8f9d1SHerbert Xu err = -EPROTONOSUPPORT; 3031da177e4SLinus Torvalds } 3041da177e4SLinus Torvalds 305696adfe8SPaul E. McKenney if (unlikely(err)) { 306bb97d31fSArnaldo Carvalho de Melo if (try_loading_module < 2) { 307bb97d31fSArnaldo Carvalho de Melo rcu_read_unlock(); 308bb97d31fSArnaldo Carvalho de Melo /* 309bb97d31fSArnaldo Carvalho de Melo * Be more specific, e.g. net-pf-2-proto-132-type-1 310bb97d31fSArnaldo Carvalho de Melo * (net-pf-PF_INET-proto-IPPROTO_SCTP-type-SOCK_STREAM) 311bb97d31fSArnaldo Carvalho de Melo */ 312bb97d31fSArnaldo Carvalho de Melo if (++try_loading_module == 1) 313bb97d31fSArnaldo Carvalho de Melo request_module("net-pf-%d-proto-%d-type-%d", 314bb97d31fSArnaldo Carvalho de Melo PF_INET, protocol, sock->type); 315bb97d31fSArnaldo Carvalho de Melo /* 316bb97d31fSArnaldo Carvalho de Melo * Fall back to generic, e.g. net-pf-2-proto-132 317bb97d31fSArnaldo Carvalho de Melo * (net-pf-PF_INET-proto-IPPROTO_SCTP) 318bb97d31fSArnaldo Carvalho de Melo */ 319bb97d31fSArnaldo Carvalho de Melo else 320bb97d31fSArnaldo Carvalho de Melo request_module("net-pf-%d-proto-%d", 321bb97d31fSArnaldo Carvalho de Melo PF_INET, protocol); 322bb97d31fSArnaldo Carvalho de Melo goto lookup_protocol; 323bb97d31fSArnaldo Carvalho de Melo } else 3241da177e4SLinus Torvalds goto out_rcu_unlock; 325bb97d31fSArnaldo Carvalho de Melo } 326bb97d31fSArnaldo Carvalho de Melo 3271da177e4SLinus Torvalds err = -EPERM; 3281da177e4SLinus Torvalds if (answer->capability > 0 && !capable(answer->capability)) 3291da177e4SLinus Torvalds goto out_rcu_unlock; 3301da177e4SLinus Torvalds 3312342fd7eSDenis V. Lunev err = -EAFNOSUPPORT; 3322342fd7eSDenis V. Lunev if (!inet_netns_ok(net, protocol)) 3332342fd7eSDenis V. Lunev goto out_rcu_unlock; 3342342fd7eSDenis V. Lunev 3351da177e4SLinus Torvalds sock->ops = answer->ops; 3361da177e4SLinus Torvalds answer_prot = answer->prot; 3371da177e4SLinus Torvalds answer_no_check = answer->no_check; 3381da177e4SLinus Torvalds answer_flags = answer->flags; 3391da177e4SLinus Torvalds rcu_read_unlock(); 3401da177e4SLinus Torvalds 341547b792cSIlpo Järvinen WARN_ON(answer_prot->slab == NULL); 3421da177e4SLinus Torvalds 3431da177e4SLinus Torvalds err = -ENOBUFS; 3446257ff21SPavel Emelyanov sk = sk_alloc(net, PF_INET, GFP_KERNEL, answer_prot); 3451da177e4SLinus Torvalds if (sk == NULL) 3461da177e4SLinus Torvalds goto out; 3471da177e4SLinus Torvalds 3481da177e4SLinus Torvalds err = 0; 3491da177e4SLinus Torvalds sk->sk_no_check = answer_no_check; 3501da177e4SLinus Torvalds if (INET_PROTOSW_REUSE & answer_flags) 3511da177e4SLinus Torvalds sk->sk_reuse = 1; 3521da177e4SLinus Torvalds 3531da177e4SLinus Torvalds inet = inet_sk(sk); 354469de9b9SPaul Moore inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0; 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds if (SOCK_RAW == sock->type) { 3571da177e4SLinus Torvalds inet->num = protocol; 3581da177e4SLinus Torvalds if (IPPROTO_RAW == protocol) 3591da177e4SLinus Torvalds inet->hdrincl = 1; 3601da177e4SLinus Torvalds } 3611da177e4SLinus Torvalds 3621da177e4SLinus Torvalds if (ipv4_config.no_pmtu_disc) 3631da177e4SLinus Torvalds inet->pmtudisc = IP_PMTUDISC_DONT; 3641da177e4SLinus Torvalds else 3651da177e4SLinus Torvalds inet->pmtudisc = IP_PMTUDISC_WANT; 3661da177e4SLinus Torvalds 3671da177e4SLinus Torvalds inet->id = 0; 3681da177e4SLinus Torvalds 3691da177e4SLinus Torvalds sock_init_data(sock, sk); 3701da177e4SLinus Torvalds 3711da177e4SLinus Torvalds sk->sk_destruct = inet_sock_destruct; 3721da177e4SLinus Torvalds sk->sk_protocol = protocol; 3731da177e4SLinus Torvalds sk->sk_backlog_rcv = sk->sk_prot->backlog_rcv; 3741da177e4SLinus Torvalds 3751da177e4SLinus Torvalds inet->uc_ttl = -1; 3761da177e4SLinus Torvalds inet->mc_loop = 1; 3771da177e4SLinus Torvalds inet->mc_ttl = 1; 378f771bef9SNivedita Singhvi inet->mc_all = 1; 3791da177e4SLinus Torvalds inet->mc_index = 0; 3801da177e4SLinus Torvalds inet->mc_list = NULL; 3811da177e4SLinus Torvalds 382e6848976SArnaldo Carvalho de Melo sk_refcnt_debug_inc(sk); 3831da177e4SLinus Torvalds 3841da177e4SLinus Torvalds if (inet->num) { 3851da177e4SLinus Torvalds /* It assumes that any protocol which allows 3861da177e4SLinus Torvalds * the user to assign a number at socket 3871da177e4SLinus Torvalds * creation time automatically 3881da177e4SLinus Torvalds * shares. 3891da177e4SLinus Torvalds */ 3901da177e4SLinus Torvalds inet->sport = htons(inet->num); 3911da177e4SLinus Torvalds /* Add to protocol hash chains. */ 3921da177e4SLinus Torvalds sk->sk_prot->hash(sk); 3931da177e4SLinus Torvalds } 3941da177e4SLinus Torvalds 3951da177e4SLinus Torvalds if (sk->sk_prot->init) { 3961da177e4SLinus Torvalds err = sk->sk_prot->init(sk); 3971da177e4SLinus Torvalds if (err) 3981da177e4SLinus Torvalds sk_common_release(sk); 3991da177e4SLinus Torvalds } 4001da177e4SLinus Torvalds out: 4011da177e4SLinus Torvalds return err; 4021da177e4SLinus Torvalds out_rcu_unlock: 4031da177e4SLinus Torvalds rcu_read_unlock(); 4041da177e4SLinus Torvalds goto out; 4051da177e4SLinus Torvalds } 4061da177e4SLinus Torvalds 4071da177e4SLinus Torvalds 4081da177e4SLinus Torvalds /* 4091da177e4SLinus Torvalds * The peer socket should always be NULL (or else). When we call this 4101da177e4SLinus Torvalds * function we are destroying the object and from then on nobody 4111da177e4SLinus Torvalds * should refer to it. 4121da177e4SLinus Torvalds */ 4131da177e4SLinus Torvalds int inet_release(struct socket *sock) 4141da177e4SLinus Torvalds { 4151da177e4SLinus Torvalds struct sock *sk = sock->sk; 4161da177e4SLinus Torvalds 4171da177e4SLinus Torvalds if (sk) { 4181da177e4SLinus Torvalds long timeout; 4191da177e4SLinus Torvalds 4201da177e4SLinus Torvalds /* Applications forget to leave groups before exiting */ 4211da177e4SLinus Torvalds ip_mc_drop_socket(sk); 4221da177e4SLinus Torvalds 4231da177e4SLinus Torvalds /* If linger is set, we don't return until the close 4241da177e4SLinus Torvalds * is complete. Otherwise we return immediately. The 4251da177e4SLinus Torvalds * actually closing is done the same either way. 4261da177e4SLinus Torvalds * 4271da177e4SLinus Torvalds * If the close is due to the process exiting, we never 4281da177e4SLinus Torvalds * linger.. 4291da177e4SLinus Torvalds */ 4301da177e4SLinus Torvalds timeout = 0; 4311da177e4SLinus Torvalds if (sock_flag(sk, SOCK_LINGER) && 4321da177e4SLinus Torvalds !(current->flags & PF_EXITING)) 4331da177e4SLinus Torvalds timeout = sk->sk_lingertime; 4341da177e4SLinus Torvalds sock->sk = NULL; 4351da177e4SLinus Torvalds sk->sk_prot->close(sk, timeout); 4361da177e4SLinus Torvalds } 4371da177e4SLinus Torvalds return 0; 4381da177e4SLinus Torvalds } 4391da177e4SLinus Torvalds 4401da177e4SLinus Torvalds /* It is off by default, see below. */ 441ab32ea5dSBrian Haley int sysctl_ip_nonlocal_bind __read_mostly; 4421da177e4SLinus Torvalds 4431da177e4SLinus Torvalds int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) 4441da177e4SLinus Torvalds { 4451da177e4SLinus Torvalds struct sockaddr_in *addr = (struct sockaddr_in *)uaddr; 4461da177e4SLinus Torvalds struct sock *sk = sock->sk; 4471da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 4481da177e4SLinus Torvalds unsigned short snum; 4491da177e4SLinus Torvalds int chk_addr_ret; 4501da177e4SLinus Torvalds int err; 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds /* If the socket has its own bind function then use it. (RAW) */ 4531da177e4SLinus Torvalds if (sk->sk_prot->bind) { 4541da177e4SLinus Torvalds err = sk->sk_prot->bind(sk, uaddr, addr_len); 4551da177e4SLinus Torvalds goto out; 4561da177e4SLinus Torvalds } 4571da177e4SLinus Torvalds err = -EINVAL; 4581da177e4SLinus Torvalds if (addr_len < sizeof(struct sockaddr_in)) 4591da177e4SLinus Torvalds goto out; 4601da177e4SLinus Torvalds 4613b1e0a65SYOSHIFUJI Hideaki chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr); 4621da177e4SLinus Torvalds 4631da177e4SLinus Torvalds /* Not specified by any standard per-se, however it breaks too 4641da177e4SLinus Torvalds * many applications when removed. It is unfortunate since 4651da177e4SLinus Torvalds * allowing applications to make a non-local bind solves 4661da177e4SLinus Torvalds * several problems with systems using dynamic addressing. 4671da177e4SLinus Torvalds * (ie. your servers still start up even if your ISDN link 4681da177e4SLinus Torvalds * is temporarily down) 4691da177e4SLinus Torvalds */ 4701da177e4SLinus Torvalds err = -EADDRNOTAVAIL; 4711da177e4SLinus Torvalds if (!sysctl_ip_nonlocal_bind && 472b9fb1506STóth László Attila !(inet->freebind || inet->transparent) && 473e6f1cebfSAl Viro addr->sin_addr.s_addr != htonl(INADDR_ANY) && 4741da177e4SLinus Torvalds chk_addr_ret != RTN_LOCAL && 4751da177e4SLinus Torvalds chk_addr_ret != RTN_MULTICAST && 4761da177e4SLinus Torvalds chk_addr_ret != RTN_BROADCAST) 4771da177e4SLinus Torvalds goto out; 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds snum = ntohs(addr->sin_port); 4801da177e4SLinus Torvalds err = -EACCES; 4811da177e4SLinus Torvalds if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 4821da177e4SLinus Torvalds goto out; 4831da177e4SLinus Torvalds 4841da177e4SLinus Torvalds /* We keep a pair of addresses. rcv_saddr is the one 4851da177e4SLinus Torvalds * used by hash lookups, and saddr is used for transmit. 4861da177e4SLinus Torvalds * 4871da177e4SLinus Torvalds * In the BSD API these are the same except where it 4881da177e4SLinus Torvalds * would be illegal to use them (multicast/broadcast) in 4891da177e4SLinus Torvalds * which case the sending device address is used. 4901da177e4SLinus Torvalds */ 4911da177e4SLinus Torvalds lock_sock(sk); 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds /* Check these errors (active socket, double bind). */ 4941da177e4SLinus Torvalds err = -EINVAL; 4951da177e4SLinus Torvalds if (sk->sk_state != TCP_CLOSE || inet->num) 4961da177e4SLinus Torvalds goto out_release_sock; 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvalds inet->rcv_saddr = inet->saddr = addr->sin_addr.s_addr; 4991da177e4SLinus Torvalds if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST) 5001da177e4SLinus Torvalds inet->saddr = 0; /* Use device */ 5011da177e4SLinus Torvalds 5021da177e4SLinus Torvalds /* Make sure we are allowed to bind here. */ 5031da177e4SLinus Torvalds if (sk->sk_prot->get_port(sk, snum)) { 5041da177e4SLinus Torvalds inet->saddr = inet->rcv_saddr = 0; 5051da177e4SLinus Torvalds err = -EADDRINUSE; 5061da177e4SLinus Torvalds goto out_release_sock; 5071da177e4SLinus Torvalds } 5081da177e4SLinus Torvalds 5091da177e4SLinus Torvalds if (inet->rcv_saddr) 5101da177e4SLinus Torvalds sk->sk_userlocks |= SOCK_BINDADDR_LOCK; 5111da177e4SLinus Torvalds if (snum) 5121da177e4SLinus Torvalds sk->sk_userlocks |= SOCK_BINDPORT_LOCK; 5131da177e4SLinus Torvalds inet->sport = htons(inet->num); 5141da177e4SLinus Torvalds inet->daddr = 0; 5151da177e4SLinus Torvalds inet->dport = 0; 5161da177e4SLinus Torvalds sk_dst_reset(sk); 5171da177e4SLinus Torvalds err = 0; 5181da177e4SLinus Torvalds out_release_sock: 5191da177e4SLinus Torvalds release_sock(sk); 5201da177e4SLinus Torvalds out: 5211da177e4SLinus Torvalds return err; 5221da177e4SLinus Torvalds } 5231da177e4SLinus Torvalds 5241da177e4SLinus Torvalds int inet_dgram_connect(struct socket *sock, struct sockaddr * uaddr, 5251da177e4SLinus Torvalds int addr_len, int flags) 5261da177e4SLinus Torvalds { 5271da177e4SLinus Torvalds struct sock *sk = sock->sk; 5281da177e4SLinus Torvalds 5291da177e4SLinus Torvalds if (uaddr->sa_family == AF_UNSPEC) 5301da177e4SLinus Torvalds return sk->sk_prot->disconnect(sk, flags); 5311da177e4SLinus Torvalds 5321da177e4SLinus Torvalds if (!inet_sk(sk)->num && inet_autobind(sk)) 5331da177e4SLinus Torvalds return -EAGAIN; 5341da177e4SLinus Torvalds return sk->sk_prot->connect(sk, (struct sockaddr *)uaddr, addr_len); 5351da177e4SLinus Torvalds } 5361da177e4SLinus Torvalds 5371da177e4SLinus Torvalds static long inet_wait_for_connect(struct sock *sk, long timeo) 5381da177e4SLinus Torvalds { 5391da177e4SLinus Torvalds DEFINE_WAIT(wait); 5401da177e4SLinus Torvalds 5411da177e4SLinus Torvalds prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); 5421da177e4SLinus Torvalds 5431da177e4SLinus Torvalds /* Basic assumption: if someone sets sk->sk_err, he _must_ 5441da177e4SLinus Torvalds * change state of the socket from TCP_SYN_*. 5451da177e4SLinus Torvalds * Connect() does not allow to get error notifications 5461da177e4SLinus Torvalds * without closing the socket. 5471da177e4SLinus Torvalds */ 5481da177e4SLinus Torvalds while ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) { 5491da177e4SLinus Torvalds release_sock(sk); 5501da177e4SLinus Torvalds timeo = schedule_timeout(timeo); 5511da177e4SLinus Torvalds lock_sock(sk); 5521da177e4SLinus Torvalds if (signal_pending(current) || !timeo) 5531da177e4SLinus Torvalds break; 5541da177e4SLinus Torvalds prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); 5551da177e4SLinus Torvalds } 5561da177e4SLinus Torvalds finish_wait(sk->sk_sleep, &wait); 5571da177e4SLinus Torvalds return timeo; 5581da177e4SLinus Torvalds } 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds /* 5611da177e4SLinus Torvalds * Connect to a remote host. There is regrettably still a little 5621da177e4SLinus Torvalds * TCP 'magic' in here. 5631da177e4SLinus Torvalds */ 5641da177e4SLinus Torvalds int inet_stream_connect(struct socket *sock, struct sockaddr *uaddr, 5651da177e4SLinus Torvalds int addr_len, int flags) 5661da177e4SLinus Torvalds { 5671da177e4SLinus Torvalds struct sock *sk = sock->sk; 5681da177e4SLinus Torvalds int err; 5691da177e4SLinus Torvalds long timeo; 5701da177e4SLinus Torvalds 5711da177e4SLinus Torvalds lock_sock(sk); 5721da177e4SLinus Torvalds 5731da177e4SLinus Torvalds if (uaddr->sa_family == AF_UNSPEC) { 5741da177e4SLinus Torvalds err = sk->sk_prot->disconnect(sk, flags); 5751da177e4SLinus Torvalds sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED; 5761da177e4SLinus Torvalds goto out; 5771da177e4SLinus Torvalds } 5781da177e4SLinus Torvalds 5791da177e4SLinus Torvalds switch (sock->state) { 5801da177e4SLinus Torvalds default: 5811da177e4SLinus Torvalds err = -EINVAL; 5821da177e4SLinus Torvalds goto out; 5831da177e4SLinus Torvalds case SS_CONNECTED: 5841da177e4SLinus Torvalds err = -EISCONN; 5851da177e4SLinus Torvalds goto out; 5861da177e4SLinus Torvalds case SS_CONNECTING: 5871da177e4SLinus Torvalds err = -EALREADY; 5881da177e4SLinus Torvalds /* Fall out of switch with err, set for this state */ 5891da177e4SLinus Torvalds break; 5901da177e4SLinus Torvalds case SS_UNCONNECTED: 5911da177e4SLinus Torvalds err = -EISCONN; 5921da177e4SLinus Torvalds if (sk->sk_state != TCP_CLOSE) 5931da177e4SLinus Torvalds goto out; 5941da177e4SLinus Torvalds 5951da177e4SLinus Torvalds err = sk->sk_prot->connect(sk, uaddr, addr_len); 5961da177e4SLinus Torvalds if (err < 0) 5971da177e4SLinus Torvalds goto out; 5981da177e4SLinus Torvalds 5991da177e4SLinus Torvalds sock->state = SS_CONNECTING; 6001da177e4SLinus Torvalds 6011da177e4SLinus Torvalds /* Just entered SS_CONNECTING state; the only 6021da177e4SLinus Torvalds * difference is that return value in non-blocking 6031da177e4SLinus Torvalds * case is EINPROGRESS, rather than EALREADY. 6041da177e4SLinus Torvalds */ 6051da177e4SLinus Torvalds err = -EINPROGRESS; 6061da177e4SLinus Torvalds break; 6071da177e4SLinus Torvalds } 6081da177e4SLinus Torvalds 6091da177e4SLinus Torvalds timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); 6101da177e4SLinus Torvalds 6111da177e4SLinus Torvalds if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) { 6121da177e4SLinus Torvalds /* Error code is set above */ 6131da177e4SLinus Torvalds if (!timeo || !inet_wait_for_connect(sk, timeo)) 6141da177e4SLinus Torvalds goto out; 6151da177e4SLinus Torvalds 6161da177e4SLinus Torvalds err = sock_intr_errno(timeo); 6171da177e4SLinus Torvalds if (signal_pending(current)) 6181da177e4SLinus Torvalds goto out; 6191da177e4SLinus Torvalds } 6201da177e4SLinus Torvalds 6211da177e4SLinus Torvalds /* Connection was closed by RST, timeout, ICMP error 6221da177e4SLinus Torvalds * or another process disconnected us. 6231da177e4SLinus Torvalds */ 6241da177e4SLinus Torvalds if (sk->sk_state == TCP_CLOSE) 6251da177e4SLinus Torvalds goto sock_error; 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds /* sk->sk_err may be not zero now, if RECVERR was ordered by user 6281da177e4SLinus Torvalds * and error was received after socket entered established state. 6291da177e4SLinus Torvalds * Hence, it is handled normally after connect() return successfully. 6301da177e4SLinus Torvalds */ 6311da177e4SLinus Torvalds 6321da177e4SLinus Torvalds sock->state = SS_CONNECTED; 6331da177e4SLinus Torvalds err = 0; 6341da177e4SLinus Torvalds out: 6351da177e4SLinus Torvalds release_sock(sk); 6361da177e4SLinus Torvalds return err; 6371da177e4SLinus Torvalds 6381da177e4SLinus Torvalds sock_error: 6391da177e4SLinus Torvalds err = sock_error(sk) ? : -ECONNABORTED; 6401da177e4SLinus Torvalds sock->state = SS_UNCONNECTED; 6411da177e4SLinus Torvalds if (sk->sk_prot->disconnect(sk, flags)) 6421da177e4SLinus Torvalds sock->state = SS_DISCONNECTING; 6431da177e4SLinus Torvalds goto out; 6441da177e4SLinus Torvalds } 6451da177e4SLinus Torvalds 6461da177e4SLinus Torvalds /* 6471da177e4SLinus Torvalds * Accept a pending connection. The TCP layer now gives BSD semantics. 6481da177e4SLinus Torvalds */ 6491da177e4SLinus Torvalds 6501da177e4SLinus Torvalds int inet_accept(struct socket *sock, struct socket *newsock, int flags) 6511da177e4SLinus Torvalds { 6521da177e4SLinus Torvalds struct sock *sk1 = sock->sk; 6531da177e4SLinus Torvalds int err = -EINVAL; 6541da177e4SLinus Torvalds struct sock *sk2 = sk1->sk_prot->accept(sk1, flags, &err); 6551da177e4SLinus Torvalds 6561da177e4SLinus Torvalds if (!sk2) 6571da177e4SLinus Torvalds goto do_err; 6581da177e4SLinus Torvalds 6591da177e4SLinus Torvalds lock_sock(sk2); 6601da177e4SLinus Torvalds 661547b792cSIlpo Järvinen WARN_ON(!((1 << sk2->sk_state) & 662547b792cSIlpo Järvinen (TCPF_ESTABLISHED | TCPF_CLOSE_WAIT | TCPF_CLOSE))); 6631da177e4SLinus Torvalds 6641da177e4SLinus Torvalds sock_graft(sk2, newsock); 6651da177e4SLinus Torvalds 6661da177e4SLinus Torvalds newsock->state = SS_CONNECTED; 6671da177e4SLinus Torvalds err = 0; 6681da177e4SLinus Torvalds release_sock(sk2); 6691da177e4SLinus Torvalds do_err: 6701da177e4SLinus Torvalds return err; 6711da177e4SLinus Torvalds } 6721da177e4SLinus Torvalds 6731da177e4SLinus Torvalds 6741da177e4SLinus Torvalds /* 6751da177e4SLinus Torvalds * This does both peername and sockname. 6761da177e4SLinus Torvalds */ 6771da177e4SLinus Torvalds int inet_getname(struct socket *sock, struct sockaddr *uaddr, 6781da177e4SLinus Torvalds int *uaddr_len, int peer) 6791da177e4SLinus Torvalds { 6801da177e4SLinus Torvalds struct sock *sk = sock->sk; 6811da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 6821da177e4SLinus Torvalds struct sockaddr_in *sin = (struct sockaddr_in *)uaddr; 6831da177e4SLinus Torvalds 6841da177e4SLinus Torvalds sin->sin_family = AF_INET; 6851da177e4SLinus Torvalds if (peer) { 6861da177e4SLinus Torvalds if (!inet->dport || 6871da177e4SLinus Torvalds (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && 6881da177e4SLinus Torvalds peer == 1)) 6891da177e4SLinus Torvalds return -ENOTCONN; 6901da177e4SLinus Torvalds sin->sin_port = inet->dport; 6911da177e4SLinus Torvalds sin->sin_addr.s_addr = inet->daddr; 6921da177e4SLinus Torvalds } else { 693714e85beSAl Viro __be32 addr = inet->rcv_saddr; 6941da177e4SLinus Torvalds if (!addr) 6951da177e4SLinus Torvalds addr = inet->saddr; 6961da177e4SLinus Torvalds sin->sin_port = inet->sport; 6971da177e4SLinus Torvalds sin->sin_addr.s_addr = addr; 6981da177e4SLinus Torvalds } 6991da177e4SLinus Torvalds memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); 7001da177e4SLinus Torvalds *uaddr_len = sizeof(*sin); 7011da177e4SLinus Torvalds return 0; 7021da177e4SLinus Torvalds } 7031da177e4SLinus Torvalds 7041da177e4SLinus Torvalds int inet_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, 7051da177e4SLinus Torvalds size_t size) 7061da177e4SLinus Torvalds { 7071da177e4SLinus Torvalds struct sock *sk = sock->sk; 7081da177e4SLinus Torvalds 7091da177e4SLinus Torvalds /* We may need to bind the socket. */ 7101da177e4SLinus Torvalds if (!inet_sk(sk)->num && inet_autobind(sk)) 7111da177e4SLinus Torvalds return -EAGAIN; 7121da177e4SLinus Torvalds 7131da177e4SLinus Torvalds return sk->sk_prot->sendmsg(iocb, sk, msg, size); 7141da177e4SLinus Torvalds } 7151da177e4SLinus Torvalds 7161da177e4SLinus Torvalds 7171da177e4SLinus Torvalds static ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset, size_t size, int flags) 7181da177e4SLinus Torvalds { 7191da177e4SLinus Torvalds struct sock *sk = sock->sk; 7201da177e4SLinus Torvalds 7211da177e4SLinus Torvalds /* We may need to bind the socket. */ 7221da177e4SLinus Torvalds if (!inet_sk(sk)->num && inet_autobind(sk)) 7231da177e4SLinus Torvalds return -EAGAIN; 7241da177e4SLinus Torvalds 7251da177e4SLinus Torvalds if (sk->sk_prot->sendpage) 7261da177e4SLinus Torvalds return sk->sk_prot->sendpage(sk, page, offset, size, flags); 7271da177e4SLinus Torvalds return sock_no_sendpage(sock, page, offset, size, flags); 7281da177e4SLinus Torvalds } 7291da177e4SLinus Torvalds 7301da177e4SLinus Torvalds 7311da177e4SLinus Torvalds int inet_shutdown(struct socket *sock, int how) 7321da177e4SLinus Torvalds { 7331da177e4SLinus Torvalds struct sock *sk = sock->sk; 7341da177e4SLinus Torvalds int err = 0; 7351da177e4SLinus Torvalds 7361da177e4SLinus Torvalds /* This should really check to make sure 7371da177e4SLinus Torvalds * the socket is a TCP socket. (WHY AC...) 7381da177e4SLinus Torvalds */ 7391da177e4SLinus Torvalds how++; /* maps 0->1 has the advantage of making bit 1 rcvs and 7401da177e4SLinus Torvalds 1->2 bit 2 snds. 7411da177e4SLinus Torvalds 2->3 */ 7421da177e4SLinus Torvalds if ((how & ~SHUTDOWN_MASK) || !how) /* MAXINT->0 */ 7431da177e4SLinus Torvalds return -EINVAL; 7441da177e4SLinus Torvalds 7451da177e4SLinus Torvalds lock_sock(sk); 7461da177e4SLinus Torvalds if (sock->state == SS_CONNECTING) { 7471da177e4SLinus Torvalds if ((1 << sk->sk_state) & 7481da177e4SLinus Torvalds (TCPF_SYN_SENT | TCPF_SYN_RECV | TCPF_CLOSE)) 7491da177e4SLinus Torvalds sock->state = SS_DISCONNECTING; 7501da177e4SLinus Torvalds else 7511da177e4SLinus Torvalds sock->state = SS_CONNECTED; 7521da177e4SLinus Torvalds } 7531da177e4SLinus Torvalds 7541da177e4SLinus Torvalds switch (sk->sk_state) { 7551da177e4SLinus Torvalds case TCP_CLOSE: 7561da177e4SLinus Torvalds err = -ENOTCONN; 7571da177e4SLinus Torvalds /* Hack to wake up other listeners, who can poll for 7581da177e4SLinus Torvalds POLLHUP, even on eg. unconnected UDP sockets -- RR */ 7591da177e4SLinus Torvalds default: 7601da177e4SLinus Torvalds sk->sk_shutdown |= how; 7611da177e4SLinus Torvalds if (sk->sk_prot->shutdown) 7621da177e4SLinus Torvalds sk->sk_prot->shutdown(sk, how); 7631da177e4SLinus Torvalds break; 7641da177e4SLinus Torvalds 7651da177e4SLinus Torvalds /* Remaining two branches are temporary solution for missing 7661da177e4SLinus Torvalds * close() in multithreaded environment. It is _not_ a good idea, 7671da177e4SLinus Torvalds * but we have no choice until close() is repaired at VFS level. 7681da177e4SLinus Torvalds */ 7691da177e4SLinus Torvalds case TCP_LISTEN: 7701da177e4SLinus Torvalds if (!(how & RCV_SHUTDOWN)) 7711da177e4SLinus Torvalds break; 7721da177e4SLinus Torvalds /* Fall through */ 7731da177e4SLinus Torvalds case TCP_SYN_SENT: 7741da177e4SLinus Torvalds err = sk->sk_prot->disconnect(sk, O_NONBLOCK); 7751da177e4SLinus Torvalds sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED; 7761da177e4SLinus Torvalds break; 7771da177e4SLinus Torvalds } 7781da177e4SLinus Torvalds 7791da177e4SLinus Torvalds /* Wake up anyone sleeping in poll. */ 7801da177e4SLinus Torvalds sk->sk_state_change(sk); 7811da177e4SLinus Torvalds release_sock(sk); 7821da177e4SLinus Torvalds return err; 7831da177e4SLinus Torvalds } 7841da177e4SLinus Torvalds 7851da177e4SLinus Torvalds /* 7861da177e4SLinus Torvalds * ioctl() calls you can issue on an INET socket. Most of these are 7871da177e4SLinus Torvalds * device configuration and stuff and very rarely used. Some ioctls 7881da177e4SLinus Torvalds * pass on to the socket itself. 7891da177e4SLinus Torvalds * 7901da177e4SLinus Torvalds * NOTE: I like the idea of a module for the config stuff. ie ifconfig 7911da177e4SLinus Torvalds * loads the devconfigure module does its configuring and unloads it. 7921da177e4SLinus Torvalds * There's a good 20K of config code hanging around the kernel. 7931da177e4SLinus Torvalds */ 7941da177e4SLinus Torvalds 7951da177e4SLinus Torvalds int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 7961da177e4SLinus Torvalds { 7971da177e4SLinus Torvalds struct sock *sk = sock->sk; 7981da177e4SLinus Torvalds int err = 0; 7993b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(sk); 8001da177e4SLinus Torvalds 8011da177e4SLinus Torvalds switch (cmd) { 8021da177e4SLinus Torvalds case SIOCGSTAMP: 8031da177e4SLinus Torvalds err = sock_get_timestamp(sk, (struct timeval __user *)arg); 8041da177e4SLinus Torvalds break; 805ae40eb1eSEric Dumazet case SIOCGSTAMPNS: 806ae40eb1eSEric Dumazet err = sock_get_timestampns(sk, (struct timespec __user *)arg); 807ae40eb1eSEric Dumazet break; 8081da177e4SLinus Torvalds case SIOCADDRT: 8091da177e4SLinus Torvalds case SIOCDELRT: 8101da177e4SLinus Torvalds case SIOCRTMSG: 811e5b13cb1SDenis V. Lunev err = ip_rt_ioctl(net, cmd, (void __user *)arg); 8121da177e4SLinus Torvalds break; 8131da177e4SLinus Torvalds case SIOCDARP: 8141da177e4SLinus Torvalds case SIOCGARP: 8151da177e4SLinus Torvalds case SIOCSARP: 816e5b13cb1SDenis V. Lunev err = arp_ioctl(net, cmd, (void __user *)arg); 8171da177e4SLinus Torvalds break; 8181da177e4SLinus Torvalds case SIOCGIFADDR: 8191da177e4SLinus Torvalds case SIOCSIFADDR: 8201da177e4SLinus Torvalds case SIOCGIFBRDADDR: 8211da177e4SLinus Torvalds case SIOCSIFBRDADDR: 8221da177e4SLinus Torvalds case SIOCGIFNETMASK: 8231da177e4SLinus Torvalds case SIOCSIFNETMASK: 8241da177e4SLinus Torvalds case SIOCGIFDSTADDR: 8251da177e4SLinus Torvalds case SIOCSIFDSTADDR: 8261da177e4SLinus Torvalds case SIOCSIFPFLAGS: 8271da177e4SLinus Torvalds case SIOCGIFPFLAGS: 8281da177e4SLinus Torvalds case SIOCSIFFLAGS: 829e5b13cb1SDenis V. Lunev err = devinet_ioctl(net, cmd, (void __user *)arg); 8301da177e4SLinus Torvalds break; 8311da177e4SLinus Torvalds default: 832b5e5fa5eSChristoph Hellwig if (sk->sk_prot->ioctl) 833b5e5fa5eSChristoph Hellwig err = sk->sk_prot->ioctl(sk, cmd, arg); 834b5e5fa5eSChristoph Hellwig else 835b5e5fa5eSChristoph Hellwig err = -ENOIOCTLCMD; 8361da177e4SLinus Torvalds break; 8371da177e4SLinus Torvalds } 8381da177e4SLinus Torvalds return err; 8391da177e4SLinus Torvalds } 8401da177e4SLinus Torvalds 84190ddc4f0SEric Dumazet const struct proto_ops inet_stream_ops = { 8421da177e4SLinus Torvalds .family = PF_INET, 8431da177e4SLinus Torvalds .owner = THIS_MODULE, 8441da177e4SLinus Torvalds .release = inet_release, 8451da177e4SLinus Torvalds .bind = inet_bind, 8461da177e4SLinus Torvalds .connect = inet_stream_connect, 8471da177e4SLinus Torvalds .socketpair = sock_no_socketpair, 8481da177e4SLinus Torvalds .accept = inet_accept, 8491da177e4SLinus Torvalds .getname = inet_getname, 8501da177e4SLinus Torvalds .poll = tcp_poll, 8511da177e4SLinus Torvalds .ioctl = inet_ioctl, 8521da177e4SLinus Torvalds .listen = inet_listen, 8531da177e4SLinus Torvalds .shutdown = inet_shutdown, 8541da177e4SLinus Torvalds .setsockopt = sock_common_setsockopt, 8551da177e4SLinus Torvalds .getsockopt = sock_common_getsockopt, 8563516ffb0SDavid S. Miller .sendmsg = tcp_sendmsg, 857543d9cfeSArnaldo Carvalho de Melo .recvmsg = sock_common_recvmsg, 858543d9cfeSArnaldo Carvalho de Melo .mmap = sock_no_mmap, 859543d9cfeSArnaldo Carvalho de Melo .sendpage = tcp_sendpage, 8609c55e01cSJens Axboe .splice_read = tcp_splice_read, 8613fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 8623fdadf7dSDmitry Mishin .compat_setsockopt = compat_sock_common_setsockopt, 8633fdadf7dSDmitry Mishin .compat_getsockopt = compat_sock_common_getsockopt, 8643fdadf7dSDmitry Mishin #endif 8651da177e4SLinus Torvalds }; 8661da177e4SLinus Torvalds 86790ddc4f0SEric Dumazet const struct proto_ops inet_dgram_ops = { 8681da177e4SLinus Torvalds .family = PF_INET, 8691da177e4SLinus Torvalds .owner = THIS_MODULE, 8701da177e4SLinus Torvalds .release = inet_release, 8711da177e4SLinus Torvalds .bind = inet_bind, 8721da177e4SLinus Torvalds .connect = inet_dgram_connect, 8731da177e4SLinus Torvalds .socketpair = sock_no_socketpair, 8741da177e4SLinus Torvalds .accept = sock_no_accept, 8751da177e4SLinus Torvalds .getname = inet_getname, 8761da177e4SLinus Torvalds .poll = udp_poll, 8771da177e4SLinus Torvalds .ioctl = inet_ioctl, 8781da177e4SLinus Torvalds .listen = sock_no_listen, 8791da177e4SLinus Torvalds .shutdown = inet_shutdown, 8801da177e4SLinus Torvalds .setsockopt = sock_common_setsockopt, 8811da177e4SLinus Torvalds .getsockopt = sock_common_getsockopt, 8821da177e4SLinus Torvalds .sendmsg = inet_sendmsg, 8831da177e4SLinus Torvalds .recvmsg = sock_common_recvmsg, 8841da177e4SLinus Torvalds .mmap = sock_no_mmap, 8851da177e4SLinus Torvalds .sendpage = inet_sendpage, 886543d9cfeSArnaldo Carvalho de Melo #ifdef CONFIG_COMPAT 887543d9cfeSArnaldo Carvalho de Melo .compat_setsockopt = compat_sock_common_setsockopt, 888543d9cfeSArnaldo Carvalho de Melo .compat_getsockopt = compat_sock_common_getsockopt, 889543d9cfeSArnaldo Carvalho de Melo #endif 8901da177e4SLinus Torvalds }; 8911da177e4SLinus Torvalds 8921da177e4SLinus Torvalds /* 8931da177e4SLinus Torvalds * For SOCK_RAW sockets; should be the same as inet_dgram_ops but without 8941da177e4SLinus Torvalds * udp_poll 8951da177e4SLinus Torvalds */ 89690ddc4f0SEric Dumazet static const struct proto_ops inet_sockraw_ops = { 8971da177e4SLinus Torvalds .family = PF_INET, 8981da177e4SLinus Torvalds .owner = THIS_MODULE, 8991da177e4SLinus Torvalds .release = inet_release, 9001da177e4SLinus Torvalds .bind = inet_bind, 9011da177e4SLinus Torvalds .connect = inet_dgram_connect, 9021da177e4SLinus Torvalds .socketpair = sock_no_socketpair, 9031da177e4SLinus Torvalds .accept = sock_no_accept, 9041da177e4SLinus Torvalds .getname = inet_getname, 9051da177e4SLinus Torvalds .poll = datagram_poll, 9061da177e4SLinus Torvalds .ioctl = inet_ioctl, 9071da177e4SLinus Torvalds .listen = sock_no_listen, 9081da177e4SLinus Torvalds .shutdown = inet_shutdown, 9091da177e4SLinus Torvalds .setsockopt = sock_common_setsockopt, 9101da177e4SLinus Torvalds .getsockopt = sock_common_getsockopt, 9111da177e4SLinus Torvalds .sendmsg = inet_sendmsg, 9121da177e4SLinus Torvalds .recvmsg = sock_common_recvmsg, 9131da177e4SLinus Torvalds .mmap = sock_no_mmap, 9141da177e4SLinus Torvalds .sendpage = inet_sendpage, 915543d9cfeSArnaldo Carvalho de Melo #ifdef CONFIG_COMPAT 916543d9cfeSArnaldo Carvalho de Melo .compat_setsockopt = compat_sock_common_setsockopt, 917543d9cfeSArnaldo Carvalho de Melo .compat_getsockopt = compat_sock_common_getsockopt, 918543d9cfeSArnaldo Carvalho de Melo #endif 9191da177e4SLinus Torvalds }; 9201da177e4SLinus Torvalds 9211da177e4SLinus Torvalds static struct net_proto_family inet_family_ops = { 9221da177e4SLinus Torvalds .family = PF_INET, 9231da177e4SLinus Torvalds .create = inet_create, 9241da177e4SLinus Torvalds .owner = THIS_MODULE, 9251da177e4SLinus Torvalds }; 9261da177e4SLinus Torvalds 9271da177e4SLinus Torvalds /* Upon startup we insert all the elements in inetsw_array[] into 9281da177e4SLinus Torvalds * the linked list inetsw. 9291da177e4SLinus Torvalds */ 9301da177e4SLinus Torvalds static struct inet_protosw inetsw_array[] = 9311da177e4SLinus Torvalds { 9321da177e4SLinus Torvalds { 9331da177e4SLinus Torvalds .type = SOCK_STREAM, 9341da177e4SLinus Torvalds .protocol = IPPROTO_TCP, 9351da177e4SLinus Torvalds .prot = &tcp_prot, 9361da177e4SLinus Torvalds .ops = &inet_stream_ops, 9371da177e4SLinus Torvalds .capability = -1, 9381da177e4SLinus Torvalds .no_check = 0, 939d83d8461SArnaldo Carvalho de Melo .flags = INET_PROTOSW_PERMANENT | 940d83d8461SArnaldo Carvalho de Melo INET_PROTOSW_ICSK, 9411da177e4SLinus Torvalds }, 9421da177e4SLinus Torvalds 9431da177e4SLinus Torvalds { 9441da177e4SLinus Torvalds .type = SOCK_DGRAM, 9451da177e4SLinus Torvalds .protocol = IPPROTO_UDP, 9461da177e4SLinus Torvalds .prot = &udp_prot, 9471da177e4SLinus Torvalds .ops = &inet_dgram_ops, 9481da177e4SLinus Torvalds .capability = -1, 9491da177e4SLinus Torvalds .no_check = UDP_CSUM_DEFAULT, 9501da177e4SLinus Torvalds .flags = INET_PROTOSW_PERMANENT, 9511da177e4SLinus Torvalds }, 9521da177e4SLinus Torvalds 9531da177e4SLinus Torvalds 9541da177e4SLinus Torvalds { 9551da177e4SLinus Torvalds .type = SOCK_RAW, 9561da177e4SLinus Torvalds .protocol = IPPROTO_IP, /* wild card */ 9571da177e4SLinus Torvalds .prot = &raw_prot, 9581da177e4SLinus Torvalds .ops = &inet_sockraw_ops, 9591da177e4SLinus Torvalds .capability = CAP_NET_RAW, 9601da177e4SLinus Torvalds .no_check = UDP_CSUM_DEFAULT, 9611da177e4SLinus Torvalds .flags = INET_PROTOSW_REUSE, 9621da177e4SLinus Torvalds } 9631da177e4SLinus Torvalds }; 9641da177e4SLinus Torvalds 965c40f6fffSDenis Cheng #define INETSW_ARRAY_LEN ARRAY_SIZE(inetsw_array) 9661da177e4SLinus Torvalds 9671da177e4SLinus Torvalds void inet_register_protosw(struct inet_protosw *p) 9681da177e4SLinus Torvalds { 9691da177e4SLinus Torvalds struct list_head *lh; 9701da177e4SLinus Torvalds struct inet_protosw *answer; 9711da177e4SLinus Torvalds int protocol = p->protocol; 9721da177e4SLinus Torvalds struct list_head *last_perm; 9731da177e4SLinus Torvalds 9741da177e4SLinus Torvalds spin_lock_bh(&inetsw_lock); 9751da177e4SLinus Torvalds 9761da177e4SLinus Torvalds if (p->type >= SOCK_MAX) 9771da177e4SLinus Torvalds goto out_illegal; 9781da177e4SLinus Torvalds 9791da177e4SLinus Torvalds /* If we are trying to override a permanent protocol, bail. */ 9801da177e4SLinus Torvalds answer = NULL; 9811da177e4SLinus Torvalds last_perm = &inetsw[p->type]; 9821da177e4SLinus Torvalds list_for_each(lh, &inetsw[p->type]) { 9831da177e4SLinus Torvalds answer = list_entry(lh, struct inet_protosw, list); 9841da177e4SLinus Torvalds 9851da177e4SLinus Torvalds /* Check only the non-wild match. */ 9861da177e4SLinus Torvalds if (INET_PROTOSW_PERMANENT & answer->flags) { 9871da177e4SLinus Torvalds if (protocol == answer->protocol) 9881da177e4SLinus Torvalds break; 9891da177e4SLinus Torvalds last_perm = lh; 9901da177e4SLinus Torvalds } 9911da177e4SLinus Torvalds 9921da177e4SLinus Torvalds answer = NULL; 9931da177e4SLinus Torvalds } 9941da177e4SLinus Torvalds if (answer) 9951da177e4SLinus Torvalds goto out_permanent; 9961da177e4SLinus Torvalds 9971da177e4SLinus Torvalds /* Add the new entry after the last permanent entry if any, so that 9981da177e4SLinus Torvalds * the new entry does not override a permanent entry when matched with 9991da177e4SLinus Torvalds * a wild-card protocol. But it is allowed to override any existing 10001da177e4SLinus Torvalds * non-permanent entry. This means that when we remove this entry, the 10011da177e4SLinus Torvalds * system automatically returns to the old behavior. 10021da177e4SLinus Torvalds */ 10031da177e4SLinus Torvalds list_add_rcu(&p->list, last_perm); 10041da177e4SLinus Torvalds out: 10051da177e4SLinus Torvalds spin_unlock_bh(&inetsw_lock); 10061da177e4SLinus Torvalds 10071da177e4SLinus Torvalds return; 10081da177e4SLinus Torvalds 10091da177e4SLinus Torvalds out_permanent: 10101da177e4SLinus Torvalds printk(KERN_ERR "Attempt to override permanent protocol %d.\n", 10111da177e4SLinus Torvalds protocol); 10121da177e4SLinus Torvalds goto out; 10131da177e4SLinus Torvalds 10141da177e4SLinus Torvalds out_illegal: 10151da177e4SLinus Torvalds printk(KERN_ERR 10161da177e4SLinus Torvalds "Ignoring attempt to register invalid socket type %d.\n", 10171da177e4SLinus Torvalds p->type); 10181da177e4SLinus Torvalds goto out; 10191da177e4SLinus Torvalds } 10201da177e4SLinus Torvalds 10211da177e4SLinus Torvalds void inet_unregister_protosw(struct inet_protosw *p) 10221da177e4SLinus Torvalds { 10231da177e4SLinus Torvalds if (INET_PROTOSW_PERMANENT & p->flags) { 10241da177e4SLinus Torvalds printk(KERN_ERR 10251da177e4SLinus Torvalds "Attempt to unregister permanent protocol %d.\n", 10261da177e4SLinus Torvalds p->protocol); 10271da177e4SLinus Torvalds } else { 10281da177e4SLinus Torvalds spin_lock_bh(&inetsw_lock); 10291da177e4SLinus Torvalds list_del_rcu(&p->list); 10301da177e4SLinus Torvalds spin_unlock_bh(&inetsw_lock); 10311da177e4SLinus Torvalds 10321da177e4SLinus Torvalds synchronize_net(); 10331da177e4SLinus Torvalds } 10341da177e4SLinus Torvalds } 10351da177e4SLinus Torvalds 103632519f11SArnaldo Carvalho de Melo /* 103732519f11SArnaldo Carvalho de Melo * Shall we try to damage output packets if routing dev changes? 103832519f11SArnaldo Carvalho de Melo */ 103932519f11SArnaldo Carvalho de Melo 1040ab32ea5dSBrian Haley int sysctl_ip_dynaddr __read_mostly; 104132519f11SArnaldo Carvalho de Melo 104232519f11SArnaldo Carvalho de Melo static int inet_sk_reselect_saddr(struct sock *sk) 104332519f11SArnaldo Carvalho de Melo { 104432519f11SArnaldo Carvalho de Melo struct inet_sock *inet = inet_sk(sk); 104532519f11SArnaldo Carvalho de Melo int err; 104632519f11SArnaldo Carvalho de Melo struct rtable *rt; 1047714e85beSAl Viro __be32 old_saddr = inet->saddr; 1048714e85beSAl Viro __be32 new_saddr; 1049bada8adcSAl Viro __be32 daddr = inet->daddr; 105032519f11SArnaldo Carvalho de Melo 105132519f11SArnaldo Carvalho de Melo if (inet->opt && inet->opt->srr) 105232519f11SArnaldo Carvalho de Melo daddr = inet->opt->faddr; 105332519f11SArnaldo Carvalho de Melo 105432519f11SArnaldo Carvalho de Melo /* Query new route. */ 105532519f11SArnaldo Carvalho de Melo err = ip_route_connect(&rt, daddr, 0, 105632519f11SArnaldo Carvalho de Melo RT_CONN_FLAGS(sk), 105732519f11SArnaldo Carvalho de Melo sk->sk_bound_dev_if, 105832519f11SArnaldo Carvalho de Melo sk->sk_protocol, 10598eb9086fSDavid S. Miller inet->sport, inet->dport, sk, 0); 106032519f11SArnaldo Carvalho de Melo if (err) 106132519f11SArnaldo Carvalho de Melo return err; 106232519f11SArnaldo Carvalho de Melo 106332519f11SArnaldo Carvalho de Melo sk_setup_caps(sk, &rt->u.dst); 106432519f11SArnaldo Carvalho de Melo 106532519f11SArnaldo Carvalho de Melo new_saddr = rt->rt_src; 106632519f11SArnaldo Carvalho de Melo 106732519f11SArnaldo Carvalho de Melo if (new_saddr == old_saddr) 106832519f11SArnaldo Carvalho de Melo return 0; 106932519f11SArnaldo Carvalho de Melo 107032519f11SArnaldo Carvalho de Melo if (sysctl_ip_dynaddr > 1) { 1071673d57e7SHarvey Harrison printk(KERN_INFO "%s(): shifting inet->saddr from %pI4 to %pI4\n", 1072673d57e7SHarvey Harrison __func__, &old_saddr, &new_saddr); 107332519f11SArnaldo Carvalho de Melo } 107432519f11SArnaldo Carvalho de Melo 107532519f11SArnaldo Carvalho de Melo inet->saddr = inet->rcv_saddr = new_saddr; 107632519f11SArnaldo Carvalho de Melo 107732519f11SArnaldo Carvalho de Melo /* 107832519f11SArnaldo Carvalho de Melo * XXX The only one ugly spot where we need to 107932519f11SArnaldo Carvalho de Melo * XXX really change the sockets identity after 108032519f11SArnaldo Carvalho de Melo * XXX it has entered the hashes. -DaveM 108132519f11SArnaldo Carvalho de Melo * 108232519f11SArnaldo Carvalho de Melo * Besides that, it does not check for connection 108332519f11SArnaldo Carvalho de Melo * uniqueness. Wait for troubles. 108432519f11SArnaldo Carvalho de Melo */ 108532519f11SArnaldo Carvalho de Melo __sk_prot_rehash(sk); 108632519f11SArnaldo Carvalho de Melo return 0; 108732519f11SArnaldo Carvalho de Melo } 108832519f11SArnaldo Carvalho de Melo 108932519f11SArnaldo Carvalho de Melo int inet_sk_rebuild_header(struct sock *sk) 109032519f11SArnaldo Carvalho de Melo { 109132519f11SArnaldo Carvalho de Melo struct inet_sock *inet = inet_sk(sk); 109232519f11SArnaldo Carvalho de Melo struct rtable *rt = (struct rtable *)__sk_dst_check(sk, 0); 10933ca3c68eSAl Viro __be32 daddr; 109432519f11SArnaldo Carvalho de Melo int err; 109532519f11SArnaldo Carvalho de Melo 109632519f11SArnaldo Carvalho de Melo /* Route is OK, nothing to do. */ 109732519f11SArnaldo Carvalho de Melo if (rt) 109832519f11SArnaldo Carvalho de Melo return 0; 109932519f11SArnaldo Carvalho de Melo 110032519f11SArnaldo Carvalho de Melo /* Reroute. */ 110132519f11SArnaldo Carvalho de Melo daddr = inet->daddr; 110232519f11SArnaldo Carvalho de Melo if (inet->opt && inet->opt->srr) 110332519f11SArnaldo Carvalho de Melo daddr = inet->opt->faddr; 110432519f11SArnaldo Carvalho de Melo { 110532519f11SArnaldo Carvalho de Melo struct flowi fl = { 110632519f11SArnaldo Carvalho de Melo .oif = sk->sk_bound_dev_if, 110732519f11SArnaldo Carvalho de Melo .nl_u = { 110832519f11SArnaldo Carvalho de Melo .ip4_u = { 110932519f11SArnaldo Carvalho de Melo .daddr = daddr, 111032519f11SArnaldo Carvalho de Melo .saddr = inet->saddr, 111132519f11SArnaldo Carvalho de Melo .tos = RT_CONN_FLAGS(sk), 111232519f11SArnaldo Carvalho de Melo }, 111332519f11SArnaldo Carvalho de Melo }, 111432519f11SArnaldo Carvalho de Melo .proto = sk->sk_protocol, 1115c8283845SBalazs Scheidler .flags = inet_sk_flowi_flags(sk), 111632519f11SArnaldo Carvalho de Melo .uli_u = { 111732519f11SArnaldo Carvalho de Melo .ports = { 111832519f11SArnaldo Carvalho de Melo .sport = inet->sport, 111932519f11SArnaldo Carvalho de Melo .dport = inet->dport, 112032519f11SArnaldo Carvalho de Melo }, 112132519f11SArnaldo Carvalho de Melo }, 112232519f11SArnaldo Carvalho de Melo }; 112332519f11SArnaldo Carvalho de Melo 1124beb8d13bSVenkat Yekkirala security_sk_classify_flow(sk, &fl); 11253b1e0a65SYOSHIFUJI Hideaki err = ip_route_output_flow(sock_net(sk), &rt, &fl, sk, 0); 112632519f11SArnaldo Carvalho de Melo } 112732519f11SArnaldo Carvalho de Melo if (!err) 112832519f11SArnaldo Carvalho de Melo sk_setup_caps(sk, &rt->u.dst); 112932519f11SArnaldo Carvalho de Melo else { 113032519f11SArnaldo Carvalho de Melo /* Routing failed... */ 113132519f11SArnaldo Carvalho de Melo sk->sk_route_caps = 0; 113232519f11SArnaldo Carvalho de Melo /* 113332519f11SArnaldo Carvalho de Melo * Other protocols have to map its equivalent state to TCP_SYN_SENT. 113432519f11SArnaldo Carvalho de Melo * DCCP maps its DCCP_REQUESTING state to TCP_SYN_SENT. -acme 113532519f11SArnaldo Carvalho de Melo */ 113632519f11SArnaldo Carvalho de Melo if (!sysctl_ip_dynaddr || 113732519f11SArnaldo Carvalho de Melo sk->sk_state != TCP_SYN_SENT || 113832519f11SArnaldo Carvalho de Melo (sk->sk_userlocks & SOCK_BINDADDR_LOCK) || 113932519f11SArnaldo Carvalho de Melo (err = inet_sk_reselect_saddr(sk)) != 0) 114032519f11SArnaldo Carvalho de Melo sk->sk_err_soft = -err; 114132519f11SArnaldo Carvalho de Melo } 114232519f11SArnaldo Carvalho de Melo 114332519f11SArnaldo Carvalho de Melo return err; 114432519f11SArnaldo Carvalho de Melo } 114532519f11SArnaldo Carvalho de Melo 114632519f11SArnaldo Carvalho de Melo EXPORT_SYMBOL(inet_sk_rebuild_header); 114732519f11SArnaldo Carvalho de Melo 1148a430a43dSHerbert Xu static int inet_gso_send_check(struct sk_buff *skb) 1149a430a43dSHerbert Xu { 1150a430a43dSHerbert Xu struct iphdr *iph; 1151a430a43dSHerbert Xu struct net_protocol *ops; 1152a430a43dSHerbert Xu int proto; 1153a430a43dSHerbert Xu int ihl; 1154a430a43dSHerbert Xu int err = -EINVAL; 1155a430a43dSHerbert Xu 1156a430a43dSHerbert Xu if (unlikely(!pskb_may_pull(skb, sizeof(*iph)))) 1157a430a43dSHerbert Xu goto out; 1158a430a43dSHerbert Xu 1159eddc9ec5SArnaldo Carvalho de Melo iph = ip_hdr(skb); 1160a430a43dSHerbert Xu ihl = iph->ihl * 4; 1161a430a43dSHerbert Xu if (ihl < sizeof(*iph)) 1162a430a43dSHerbert Xu goto out; 1163a430a43dSHerbert Xu 1164a430a43dSHerbert Xu if (unlikely(!pskb_may_pull(skb, ihl))) 1165a430a43dSHerbert Xu goto out; 1166a430a43dSHerbert Xu 1167badff6d0SArnaldo Carvalho de Melo __skb_pull(skb, ihl); 1168badff6d0SArnaldo Carvalho de Melo skb_reset_transport_header(skb); 1169eddc9ec5SArnaldo Carvalho de Melo iph = ip_hdr(skb); 1170a430a43dSHerbert Xu proto = iph->protocol & (MAX_INET_PROTOS - 1); 1171a430a43dSHerbert Xu err = -EPROTONOSUPPORT; 1172a430a43dSHerbert Xu 1173a430a43dSHerbert Xu rcu_read_lock(); 1174a430a43dSHerbert Xu ops = rcu_dereference(inet_protos[proto]); 1175a430a43dSHerbert Xu if (likely(ops && ops->gso_send_check)) 1176a430a43dSHerbert Xu err = ops->gso_send_check(skb); 1177a430a43dSHerbert Xu rcu_read_unlock(); 1178a430a43dSHerbert Xu 1179a430a43dSHerbert Xu out: 1180a430a43dSHerbert Xu return err; 1181a430a43dSHerbert Xu } 1182a430a43dSHerbert Xu 1183576a30ebSHerbert Xu static struct sk_buff *inet_gso_segment(struct sk_buff *skb, int features) 1184f4c50d99SHerbert Xu { 1185f4c50d99SHerbert Xu struct sk_buff *segs = ERR_PTR(-EINVAL); 1186f4c50d99SHerbert Xu struct iphdr *iph; 1187f4c50d99SHerbert Xu struct net_protocol *ops; 1188f4c50d99SHerbert Xu int proto; 1189f4c50d99SHerbert Xu int ihl; 1190f4c50d99SHerbert Xu int id; 1191f4c50d99SHerbert Xu 1192d212f87bSStephen Hemminger if (!(features & NETIF_F_V4_CSUM)) 1193d212f87bSStephen Hemminger features &= ~NETIF_F_SG; 1194d212f87bSStephen Hemminger 1195bbcf467dSHerbert Xu if (unlikely(skb_shinfo(skb)->gso_type & 1196bbcf467dSHerbert Xu ~(SKB_GSO_TCPV4 | 1197bbcf467dSHerbert Xu SKB_GSO_UDP | 1198bbcf467dSHerbert Xu SKB_GSO_DODGY | 1199bbcf467dSHerbert Xu SKB_GSO_TCP_ECN | 1200bbcf467dSHerbert Xu 0))) 1201bbcf467dSHerbert Xu goto out; 1202bbcf467dSHerbert Xu 1203bbcf467dSHerbert Xu if (unlikely(!pskb_may_pull(skb, sizeof(*iph)))) 1204f4c50d99SHerbert Xu goto out; 1205f4c50d99SHerbert Xu 1206eddc9ec5SArnaldo Carvalho de Melo iph = ip_hdr(skb); 1207f4c50d99SHerbert Xu ihl = iph->ihl * 4; 1208f4c50d99SHerbert Xu if (ihl < sizeof(*iph)) 1209f4c50d99SHerbert Xu goto out; 1210f4c50d99SHerbert Xu 1211bbcf467dSHerbert Xu if (unlikely(!pskb_may_pull(skb, ihl))) 1212f4c50d99SHerbert Xu goto out; 1213f4c50d99SHerbert Xu 1214badff6d0SArnaldo Carvalho de Melo __skb_pull(skb, ihl); 1215badff6d0SArnaldo Carvalho de Melo skb_reset_transport_header(skb); 1216eddc9ec5SArnaldo Carvalho de Melo iph = ip_hdr(skb); 1217f4c50d99SHerbert Xu id = ntohs(iph->id); 1218f4c50d99SHerbert Xu proto = iph->protocol & (MAX_INET_PROTOS - 1); 1219f4c50d99SHerbert Xu segs = ERR_PTR(-EPROTONOSUPPORT); 1220f4c50d99SHerbert Xu 1221f4c50d99SHerbert Xu rcu_read_lock(); 1222f4c50d99SHerbert Xu ops = rcu_dereference(inet_protos[proto]); 1223bbcf467dSHerbert Xu if (likely(ops && ops->gso_segment)) 1224576a30ebSHerbert Xu segs = ops->gso_segment(skb, features); 1225f4c50d99SHerbert Xu rcu_read_unlock(); 1226f4c50d99SHerbert Xu 1227801678c5SHirofumi Nakagawa if (!segs || IS_ERR(segs)) 1228f4c50d99SHerbert Xu goto out; 1229f4c50d99SHerbert Xu 1230f4c50d99SHerbert Xu skb = segs; 1231f4c50d99SHerbert Xu do { 1232eddc9ec5SArnaldo Carvalho de Melo iph = ip_hdr(skb); 1233f4c50d99SHerbert Xu iph->id = htons(id++); 1234f4c50d99SHerbert Xu iph->tot_len = htons(skb->len - skb->mac_len); 1235f4c50d99SHerbert Xu iph->check = 0; 1236d56f90a7SArnaldo Carvalho de Melo iph->check = ip_fast_csum(skb_network_header(skb), iph->ihl); 1237f4c50d99SHerbert Xu } while ((skb = skb->next)); 1238f4c50d99SHerbert Xu 1239f4c50d99SHerbert Xu out: 1240f4c50d99SHerbert Xu return segs; 1241f4c50d99SHerbert Xu } 1242f4c50d99SHerbert Xu 124373cc19f1SHerbert Xu static struct sk_buff **inet_gro_receive(struct sk_buff **head, 124473cc19f1SHerbert Xu struct sk_buff *skb) 124573cc19f1SHerbert Xu { 124673cc19f1SHerbert Xu struct net_protocol *ops; 124773cc19f1SHerbert Xu struct sk_buff **pp = NULL; 124873cc19f1SHerbert Xu struct sk_buff *p; 124973cc19f1SHerbert Xu struct iphdr *iph; 1250a5b1cf28SHerbert Xu unsigned int hlen; 1251a5b1cf28SHerbert Xu unsigned int off; 12521075f3f6SHerbert Xu unsigned int id; 125373cc19f1SHerbert Xu int flush = 1; 125473cc19f1SHerbert Xu int proto; 125573cc19f1SHerbert Xu 1256a5b1cf28SHerbert Xu off = skb_gro_offset(skb); 1257a5b1cf28SHerbert Xu hlen = off + sizeof(*iph); 1258a5b1cf28SHerbert Xu iph = skb_gro_header_fast(skb, off); 1259a5b1cf28SHerbert Xu if (skb_gro_header_hard(skb, hlen)) { 1260a5b1cf28SHerbert Xu iph = skb_gro_header_slow(skb, hlen, off); 126186911732SHerbert Xu if (unlikely(!iph)) 126273cc19f1SHerbert Xu goto out; 1263a5b1cf28SHerbert Xu } 126473cc19f1SHerbert Xu 126573cc19f1SHerbert Xu proto = iph->protocol & (MAX_INET_PROTOS - 1); 126673cc19f1SHerbert Xu 126773cc19f1SHerbert Xu rcu_read_lock(); 126873cc19f1SHerbert Xu ops = rcu_dereference(inet_protos[proto]); 126973cc19f1SHerbert Xu if (!ops || !ops->gro_receive) 127073cc19f1SHerbert Xu goto out_unlock; 127173cc19f1SHerbert Xu 1272a5ad24beSHerbert Xu if (*(u8 *)iph != 0x45) 127373cc19f1SHerbert Xu goto out_unlock; 127473cc19f1SHerbert Xu 127573cc19f1SHerbert Xu if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl))) 127673cc19f1SHerbert Xu goto out_unlock; 127773cc19f1SHerbert Xu 12781075f3f6SHerbert Xu id = ntohl(*(u32 *)&iph->id); 12791075f3f6SHerbert Xu flush = (u16)((ntohl(*(u32 *)iph) ^ skb_gro_len(skb)) | (id ^ IP_DF)); 12801075f3f6SHerbert Xu id >>= 16; 128173cc19f1SHerbert Xu 128273cc19f1SHerbert Xu for (p = *head; p; p = p->next) { 128373cc19f1SHerbert Xu struct iphdr *iph2; 128473cc19f1SHerbert Xu 128573cc19f1SHerbert Xu if (!NAPI_GRO_CB(p)->same_flow) 128673cc19f1SHerbert Xu continue; 128773cc19f1SHerbert Xu 128873cc19f1SHerbert Xu iph2 = ip_hdr(p); 128973cc19f1SHerbert Xu 1290a5ad24beSHerbert Xu if ((iph->protocol ^ iph2->protocol) | 1291a5ad24beSHerbert Xu (iph->tos ^ iph2->tos) | 1292a5ad24beSHerbert Xu (iph->saddr ^ iph2->saddr) | 1293a5ad24beSHerbert Xu (iph->daddr ^ iph2->daddr)) { 129473cc19f1SHerbert Xu NAPI_GRO_CB(p)->same_flow = 0; 129573cc19f1SHerbert Xu continue; 129673cc19f1SHerbert Xu } 129773cc19f1SHerbert Xu 129873cc19f1SHerbert Xu /* All fields must match except length and checksum. */ 129973cc19f1SHerbert Xu NAPI_GRO_CB(p)->flush |= 1300a5ad24beSHerbert Xu (iph->ttl ^ iph2->ttl) | 1301a5ad24beSHerbert Xu ((u16)(ntohs(iph2->id) + NAPI_GRO_CB(p)->count) ^ id); 130273cc19f1SHerbert Xu 130373cc19f1SHerbert Xu NAPI_GRO_CB(p)->flush |= flush; 130473cc19f1SHerbert Xu } 130573cc19f1SHerbert Xu 130673cc19f1SHerbert Xu NAPI_GRO_CB(skb)->flush |= flush; 130786911732SHerbert Xu skb_gro_pull(skb, sizeof(*iph)); 130886911732SHerbert Xu skb_set_transport_header(skb, skb_gro_offset(skb)); 130973cc19f1SHerbert Xu 131073cc19f1SHerbert Xu pp = ops->gro_receive(head, skb); 131173cc19f1SHerbert Xu 131273cc19f1SHerbert Xu out_unlock: 131373cc19f1SHerbert Xu rcu_read_unlock(); 131473cc19f1SHerbert Xu 131573cc19f1SHerbert Xu out: 131673cc19f1SHerbert Xu NAPI_GRO_CB(skb)->flush |= flush; 131773cc19f1SHerbert Xu 131873cc19f1SHerbert Xu return pp; 131973cc19f1SHerbert Xu } 132073cc19f1SHerbert Xu 132173cc19f1SHerbert Xu static int inet_gro_complete(struct sk_buff *skb) 132273cc19f1SHerbert Xu { 132373cc19f1SHerbert Xu struct net_protocol *ops; 132473cc19f1SHerbert Xu struct iphdr *iph = ip_hdr(skb); 132573cc19f1SHerbert Xu int proto = iph->protocol & (MAX_INET_PROTOS - 1); 132673cc19f1SHerbert Xu int err = -ENOSYS; 132773cc19f1SHerbert Xu __be16 newlen = htons(skb->len - skb_network_offset(skb)); 132873cc19f1SHerbert Xu 132973cc19f1SHerbert Xu csum_replace2(&iph->check, iph->tot_len, newlen); 133073cc19f1SHerbert Xu iph->tot_len = newlen; 133173cc19f1SHerbert Xu 133273cc19f1SHerbert Xu rcu_read_lock(); 133373cc19f1SHerbert Xu ops = rcu_dereference(inet_protos[proto]); 133473cc19f1SHerbert Xu if (WARN_ON(!ops || !ops->gro_complete)) 133573cc19f1SHerbert Xu goto out_unlock; 133673cc19f1SHerbert Xu 133773cc19f1SHerbert Xu err = ops->gro_complete(skb); 133873cc19f1SHerbert Xu 133973cc19f1SHerbert Xu out_unlock: 134073cc19f1SHerbert Xu rcu_read_unlock(); 134173cc19f1SHerbert Xu 134273cc19f1SHerbert Xu return err; 134373cc19f1SHerbert Xu } 134473cc19f1SHerbert Xu 1345eee4fe4dSDenis V. Lunev int inet_ctl_sock_create(struct sock **sk, unsigned short family, 13465677242fSDenis V. Lunev unsigned short type, unsigned char protocol, 13475677242fSDenis V. Lunev struct net *net) 13483d58b5faSDenis V. Lunev { 1349eee4fe4dSDenis V. Lunev struct socket *sock; 1350eee4fe4dSDenis V. Lunev int rc = sock_create_kern(family, type, protocol, &sock); 13513d58b5faSDenis V. Lunev 13523d58b5faSDenis V. Lunev if (rc == 0) { 1353eee4fe4dSDenis V. Lunev *sk = sock->sk; 1354eee4fe4dSDenis V. Lunev (*sk)->sk_allocation = GFP_ATOMIC; 13553d58b5faSDenis V. Lunev /* 13563d58b5faSDenis V. Lunev * Unhash it so that IP input processing does not even see it, 13573d58b5faSDenis V. Lunev * we do not wish this socket to see incoming packets. 13583d58b5faSDenis V. Lunev */ 1359eee4fe4dSDenis V. Lunev (*sk)->sk_prot->unhash(*sk); 13605677242fSDenis V. Lunev 13615677242fSDenis V. Lunev sk_change_net(*sk, net); 13623d58b5faSDenis V. Lunev } 13633d58b5faSDenis V. Lunev return rc; 13643d58b5faSDenis V. Lunev } 13653d58b5faSDenis V. Lunev 13663d58b5faSDenis V. Lunev EXPORT_SYMBOL_GPL(inet_ctl_sock_create); 13673d58b5faSDenis V. Lunev 13685e0f0435SHerbert Xu unsigned long snmp_fold_field(void *mib[], int offt) 13695e0f0435SHerbert Xu { 13705e0f0435SHerbert Xu unsigned long res = 0; 13715e0f0435SHerbert Xu int i; 13725e0f0435SHerbert Xu 13735e0f0435SHerbert Xu for_each_possible_cpu(i) { 13745e0f0435SHerbert Xu res += *(((unsigned long *) per_cpu_ptr(mib[0], i)) + offt); 13755e0f0435SHerbert Xu res += *(((unsigned long *) per_cpu_ptr(mib[1], i)) + offt); 13765e0f0435SHerbert Xu } 13775e0f0435SHerbert Xu return res; 13785e0f0435SHerbert Xu } 13795e0f0435SHerbert Xu EXPORT_SYMBOL_GPL(snmp_fold_field); 13805e0f0435SHerbert Xu 1381c69bce20SYOSHIFUJI Hideaki int snmp_mib_init(void *ptr[2], size_t mibsize) 13825e0f0435SHerbert Xu { 13835e0f0435SHerbert Xu BUG_ON(ptr == NULL); 1384313e458fSRusty Russell ptr[0] = __alloc_percpu(mibsize, __alignof__(unsigned long long)); 13855e0f0435SHerbert Xu if (!ptr[0]) 13865e0f0435SHerbert Xu goto err0; 1387313e458fSRusty Russell ptr[1] = __alloc_percpu(mibsize, __alignof__(unsigned long long)); 13885e0f0435SHerbert Xu if (!ptr[1]) 13895e0f0435SHerbert Xu goto err1; 13905e0f0435SHerbert Xu return 0; 13915e0f0435SHerbert Xu err1: 13925e0f0435SHerbert Xu free_percpu(ptr[0]); 13935e0f0435SHerbert Xu ptr[0] = NULL; 13945e0f0435SHerbert Xu err0: 13955e0f0435SHerbert Xu return -ENOMEM; 13965e0f0435SHerbert Xu } 13975e0f0435SHerbert Xu EXPORT_SYMBOL_GPL(snmp_mib_init); 13985e0f0435SHerbert Xu 13995e0f0435SHerbert Xu void snmp_mib_free(void *ptr[2]) 14005e0f0435SHerbert Xu { 14015e0f0435SHerbert Xu BUG_ON(ptr == NULL); 14025e0f0435SHerbert Xu free_percpu(ptr[0]); 14035e0f0435SHerbert Xu free_percpu(ptr[1]); 14045e0f0435SHerbert Xu ptr[0] = ptr[1] = NULL; 14055e0f0435SHerbert Xu } 14065e0f0435SHerbert Xu EXPORT_SYMBOL_GPL(snmp_mib_free); 14075e0f0435SHerbert Xu 14081da177e4SLinus Torvalds #ifdef CONFIG_IP_MULTICAST 14091da177e4SLinus Torvalds static struct net_protocol igmp_protocol = { 14101da177e4SLinus Torvalds .handler = igmp_rcv, 1411b4ee07dfSAlexey Dobriyan .netns_ok = 1, 14121da177e4SLinus Torvalds }; 14131da177e4SLinus Torvalds #endif 14141da177e4SLinus Torvalds 14151da177e4SLinus Torvalds static struct net_protocol tcp_protocol = { 14161da177e4SLinus Torvalds .handler = tcp_v4_rcv, 14171da177e4SLinus Torvalds .err_handler = tcp_v4_err, 1418a430a43dSHerbert Xu .gso_send_check = tcp_v4_gso_send_check, 1419f4c50d99SHerbert Xu .gso_segment = tcp_tso_segment, 1420bf296b12SHerbert Xu .gro_receive = tcp4_gro_receive, 1421bf296b12SHerbert Xu .gro_complete = tcp4_gro_complete, 14221da177e4SLinus Torvalds .no_policy = 1, 142392f1fecbSDenis V. Lunev .netns_ok = 1, 14241da177e4SLinus Torvalds }; 14251da177e4SLinus Torvalds 14261da177e4SLinus Torvalds static struct net_protocol udp_protocol = { 14271da177e4SLinus Torvalds .handler = udp_rcv, 14281da177e4SLinus Torvalds .err_handler = udp_err, 14291da177e4SLinus Torvalds .no_policy = 1, 143092f1fecbSDenis V. Lunev .netns_ok = 1, 14311da177e4SLinus Torvalds }; 14321da177e4SLinus Torvalds 14331da177e4SLinus Torvalds static struct net_protocol icmp_protocol = { 14341da177e4SLinus Torvalds .handler = icmp_rcv, 14358b7817f3SHerbert Xu .no_policy = 1, 143692f1fecbSDenis V. Lunev .netns_ok = 1, 14371da177e4SLinus Torvalds }; 14381da177e4SLinus Torvalds 14399b4661bdSPavel Emelyanov static __net_init int ipv4_mib_init_net(struct net *net) 14409b4661bdSPavel Emelyanov { 144157ef42d5SPavel Emelyanov if (snmp_mib_init((void **)net->mib.tcp_statistics, 144257ef42d5SPavel Emelyanov sizeof(struct tcp_mib)) < 0) 144357ef42d5SPavel Emelyanov goto err_tcp_mib; 1444a20f5799SPavel Emelyanov if (snmp_mib_init((void **)net->mib.ip_statistics, 1445a20f5799SPavel Emelyanov sizeof(struct ipstats_mib)) < 0) 1446a20f5799SPavel Emelyanov goto err_ip_mib; 144761a7e260SPavel Emelyanov if (snmp_mib_init((void **)net->mib.net_statistics, 144861a7e260SPavel Emelyanov sizeof(struct linux_mib)) < 0) 144961a7e260SPavel Emelyanov goto err_net_mib; 14502f275f91SPavel Emelyanov if (snmp_mib_init((void **)net->mib.udp_statistics, 14512f275f91SPavel Emelyanov sizeof(struct udp_mib)) < 0) 14522f275f91SPavel Emelyanov goto err_udp_mib; 1453386019d3SPavel Emelyanov if (snmp_mib_init((void **)net->mib.udplite_statistics, 1454386019d3SPavel Emelyanov sizeof(struct udp_mib)) < 0) 1455386019d3SPavel Emelyanov goto err_udplite_mib; 1456b60538a0SPavel Emelyanov if (snmp_mib_init((void **)net->mib.icmp_statistics, 1457b60538a0SPavel Emelyanov sizeof(struct icmp_mib)) < 0) 1458b60538a0SPavel Emelyanov goto err_icmp_mib; 1459923c6586SPavel Emelyanov if (snmp_mib_init((void **)net->mib.icmpmsg_statistics, 1460923c6586SPavel Emelyanov sizeof(struct icmpmsg_mib)) < 0) 1461923c6586SPavel Emelyanov goto err_icmpmsg_mib; 146257ef42d5SPavel Emelyanov 146357ef42d5SPavel Emelyanov tcp_mib_init(net); 14649b4661bdSPavel Emelyanov return 0; 146557ef42d5SPavel Emelyanov 1466923c6586SPavel Emelyanov err_icmpmsg_mib: 1467923c6586SPavel Emelyanov snmp_mib_free((void **)net->mib.icmp_statistics); 1468b60538a0SPavel Emelyanov err_icmp_mib: 1469b60538a0SPavel Emelyanov snmp_mib_free((void **)net->mib.udplite_statistics); 1470386019d3SPavel Emelyanov err_udplite_mib: 1471386019d3SPavel Emelyanov snmp_mib_free((void **)net->mib.udp_statistics); 14722f275f91SPavel Emelyanov err_udp_mib: 14732f275f91SPavel Emelyanov snmp_mib_free((void **)net->mib.net_statistics); 147461a7e260SPavel Emelyanov err_net_mib: 147561a7e260SPavel Emelyanov snmp_mib_free((void **)net->mib.ip_statistics); 1476a20f5799SPavel Emelyanov err_ip_mib: 1477a20f5799SPavel Emelyanov snmp_mib_free((void **)net->mib.tcp_statistics); 147857ef42d5SPavel Emelyanov err_tcp_mib: 147957ef42d5SPavel Emelyanov return -ENOMEM; 14809b4661bdSPavel Emelyanov } 14819b4661bdSPavel Emelyanov 14829b4661bdSPavel Emelyanov static __net_exit void ipv4_mib_exit_net(struct net *net) 14839b4661bdSPavel Emelyanov { 1484923c6586SPavel Emelyanov snmp_mib_free((void **)net->mib.icmpmsg_statistics); 1485b60538a0SPavel Emelyanov snmp_mib_free((void **)net->mib.icmp_statistics); 1486386019d3SPavel Emelyanov snmp_mib_free((void **)net->mib.udplite_statistics); 14872f275f91SPavel Emelyanov snmp_mib_free((void **)net->mib.udp_statistics); 148861a7e260SPavel Emelyanov snmp_mib_free((void **)net->mib.net_statistics); 1489a20f5799SPavel Emelyanov snmp_mib_free((void **)net->mib.ip_statistics); 149057ef42d5SPavel Emelyanov snmp_mib_free((void **)net->mib.tcp_statistics); 14919b4661bdSPavel Emelyanov } 14929b4661bdSPavel Emelyanov 14939b4661bdSPavel Emelyanov static __net_initdata struct pernet_operations ipv4_mib_ops = { 14949b4661bdSPavel Emelyanov .init = ipv4_mib_init_net, 14959b4661bdSPavel Emelyanov .exit = ipv4_mib_exit_net, 14969b4661bdSPavel Emelyanov }; 14979b4661bdSPavel Emelyanov 14981da177e4SLinus Torvalds static int __init init_ipv4_mibs(void) 14991da177e4SLinus Torvalds { 1500d89cbbb1SPavel Emelyanov return register_pernet_subsys(&ipv4_mib_ops); 15011da177e4SLinus Torvalds } 15021da177e4SLinus Torvalds 15031da177e4SLinus Torvalds static int ipv4_proc_init(void); 15041da177e4SLinus Torvalds 150530e224d7SHerbert Xu /* 150630e224d7SHerbert Xu * IP protocol layer initialiser 150730e224d7SHerbert Xu */ 150830e224d7SHerbert Xu 15097546dd97SStephen Hemminger static struct packet_type ip_packet_type __read_mostly = { 151009640e63SHarvey Harrison .type = cpu_to_be16(ETH_P_IP), 151130e224d7SHerbert Xu .func = ip_rcv, 1512a430a43dSHerbert Xu .gso_send_check = inet_gso_send_check, 1513f4c50d99SHerbert Xu .gso_segment = inet_gso_segment, 151473cc19f1SHerbert Xu .gro_receive = inet_gro_receive, 151573cc19f1SHerbert Xu .gro_complete = inet_gro_complete, 151630e224d7SHerbert Xu }; 151730e224d7SHerbert Xu 15181da177e4SLinus Torvalds static int __init inet_init(void) 15191da177e4SLinus Torvalds { 15201da177e4SLinus Torvalds struct sk_buff *dummy_skb; 15211da177e4SLinus Torvalds struct inet_protosw *q; 15221da177e4SLinus Torvalds struct list_head *r; 15231da177e4SLinus Torvalds int rc = -EINVAL; 15241da177e4SLinus Torvalds 1525ef047f5eSYOSHIFUJI Hideaki BUILD_BUG_ON(sizeof(struct inet_skb_parm) > sizeof(dummy_skb->cb)); 15261da177e4SLinus Torvalds 15271da177e4SLinus Torvalds rc = proto_register(&tcp_prot, 1); 15281da177e4SLinus Torvalds if (rc) 15291da177e4SLinus Torvalds goto out; 15301da177e4SLinus Torvalds 15311da177e4SLinus Torvalds rc = proto_register(&udp_prot, 1); 15321da177e4SLinus Torvalds if (rc) 15331da177e4SLinus Torvalds goto out_unregister_tcp_proto; 15341da177e4SLinus Torvalds 15351da177e4SLinus Torvalds rc = proto_register(&raw_prot, 1); 15361da177e4SLinus Torvalds if (rc) 15371da177e4SLinus Torvalds goto out_unregister_udp_proto; 15381da177e4SLinus Torvalds 15391da177e4SLinus Torvalds /* 15401da177e4SLinus Torvalds * Tell SOCKET that we are alive... 15411da177e4SLinus Torvalds */ 15421da177e4SLinus Torvalds 15431da177e4SLinus Torvalds (void)sock_register(&inet_family_ops); 15441da177e4SLinus Torvalds 1545bd7b1533SAl Viro #ifdef CONFIG_SYSCTL 1546bd7b1533SAl Viro ip_static_sysctl_init(); 1547bd7b1533SAl Viro #endif 1548bd7b1533SAl Viro 15491da177e4SLinus Torvalds /* 15501da177e4SLinus Torvalds * Add all the base protocols. 15511da177e4SLinus Torvalds */ 15521da177e4SLinus Torvalds 15531da177e4SLinus Torvalds if (inet_add_protocol(&icmp_protocol, IPPROTO_ICMP) < 0) 15541da177e4SLinus Torvalds printk(KERN_CRIT "inet_init: Cannot add ICMP protocol\n"); 15551da177e4SLinus Torvalds if (inet_add_protocol(&udp_protocol, IPPROTO_UDP) < 0) 15561da177e4SLinus Torvalds printk(KERN_CRIT "inet_init: Cannot add UDP protocol\n"); 15571da177e4SLinus Torvalds if (inet_add_protocol(&tcp_protocol, IPPROTO_TCP) < 0) 15581da177e4SLinus Torvalds printk(KERN_CRIT "inet_init: Cannot add TCP protocol\n"); 15591da177e4SLinus Torvalds #ifdef CONFIG_IP_MULTICAST 15601da177e4SLinus Torvalds if (inet_add_protocol(&igmp_protocol, IPPROTO_IGMP) < 0) 15611da177e4SLinus Torvalds printk(KERN_CRIT "inet_init: Cannot add IGMP protocol\n"); 15621da177e4SLinus Torvalds #endif 15631da177e4SLinus Torvalds 15641da177e4SLinus Torvalds /* Register the socket-side information for inet_create. */ 15651da177e4SLinus Torvalds for (r = &inetsw[0]; r < &inetsw[SOCK_MAX]; ++r) 15661da177e4SLinus Torvalds INIT_LIST_HEAD(r); 15671da177e4SLinus Torvalds 15681da177e4SLinus Torvalds for (q = inetsw_array; q < &inetsw_array[INETSW_ARRAY_LEN]; ++q) 15691da177e4SLinus Torvalds inet_register_protosw(q); 15701da177e4SLinus Torvalds 15711da177e4SLinus Torvalds /* 15721da177e4SLinus Torvalds * Set the ARP module up 15731da177e4SLinus Torvalds */ 15741da177e4SLinus Torvalds 15751da177e4SLinus Torvalds arp_init(); 15761da177e4SLinus Torvalds 15771da177e4SLinus Torvalds /* 15781da177e4SLinus Torvalds * Set the IP module up 15791da177e4SLinus Torvalds */ 15801da177e4SLinus Torvalds 15811da177e4SLinus Torvalds ip_init(); 15821da177e4SLinus Torvalds 15839b0f976fSDenis V. Lunev tcp_v4_init(); 15841da177e4SLinus Torvalds 15851da177e4SLinus Torvalds /* Setup TCP slab cache for open requests. */ 15861da177e4SLinus Torvalds tcp_init(); 15871da177e4SLinus Torvalds 158895766fffSHideo Aoki /* Setup UDP memory threshold */ 158995766fffSHideo Aoki udp_init(); 159095766fffSHideo Aoki 1591ba4e58ecSGerrit Renker /* Add UDP-Lite (RFC 3828) */ 1592ba4e58ecSGerrit Renker udplite4_register(); 15931da177e4SLinus Torvalds 15941da177e4SLinus Torvalds /* 15951da177e4SLinus Torvalds * Set the ICMP layer up 15961da177e4SLinus Torvalds */ 15971da177e4SLinus Torvalds 1598a5710d65SDenis V. Lunev if (icmp_init() < 0) 1599a5710d65SDenis V. Lunev panic("Failed to create the ICMP control socket.\n"); 16001da177e4SLinus Torvalds 16011da177e4SLinus Torvalds /* 16021da177e4SLinus Torvalds * Initialise the multicast router 16031da177e4SLinus Torvalds */ 16041da177e4SLinus Torvalds #if defined(CONFIG_IP_MROUTE) 160503d2f897SWang Chen if (ip_mr_init()) 160603d2f897SWang Chen printk(KERN_CRIT "inet_init: Cannot init ipv4 mroute\n"); 16071da177e4SLinus Torvalds #endif 16081da177e4SLinus Torvalds /* 16091da177e4SLinus Torvalds * Initialise per-cpu ipv4 mibs 16101da177e4SLinus Torvalds */ 16111da177e4SLinus Torvalds 16121da177e4SLinus Torvalds if (init_ipv4_mibs()) 161303d2f897SWang Chen printk(KERN_CRIT "inet_init: Cannot init ipv4 mibs\n"); 16141da177e4SLinus Torvalds 16151da177e4SLinus Torvalds ipv4_proc_init(); 16161da177e4SLinus Torvalds 16171da177e4SLinus Torvalds ipfrag_init(); 16181da177e4SLinus Torvalds 161930e224d7SHerbert Xu dev_add_pack(&ip_packet_type); 162030e224d7SHerbert Xu 16211da177e4SLinus Torvalds rc = 0; 16221da177e4SLinus Torvalds out: 16231da177e4SLinus Torvalds return rc; 16241da177e4SLinus Torvalds out_unregister_udp_proto: 16251da177e4SLinus Torvalds proto_unregister(&udp_prot); 1626321efff7SOlaf Kirch out_unregister_tcp_proto: 1627321efff7SOlaf Kirch proto_unregister(&tcp_prot); 16281da177e4SLinus Torvalds goto out; 16291da177e4SLinus Torvalds } 16301da177e4SLinus Torvalds 1631a536e077SHeiko Carstens fs_initcall(inet_init); 16321da177e4SLinus Torvalds 16331da177e4SLinus Torvalds /* ------------------------------------------------------------------------ */ 16341da177e4SLinus Torvalds 16351da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 16361da177e4SLinus Torvalds static int __init ipv4_proc_init(void) 16371da177e4SLinus Torvalds { 16381da177e4SLinus Torvalds int rc = 0; 16391da177e4SLinus Torvalds 16401da177e4SLinus Torvalds if (raw_proc_init()) 16411da177e4SLinus Torvalds goto out_raw; 16421da177e4SLinus Torvalds if (tcp4_proc_init()) 16431da177e4SLinus Torvalds goto out_tcp; 16441da177e4SLinus Torvalds if (udp4_proc_init()) 16451da177e4SLinus Torvalds goto out_udp; 16461da177e4SLinus Torvalds if (ip_misc_proc_init()) 16471da177e4SLinus Torvalds goto out_misc; 16481da177e4SLinus Torvalds out: 16491da177e4SLinus Torvalds return rc; 16501da177e4SLinus Torvalds out_misc: 16511da177e4SLinus Torvalds udp4_proc_exit(); 16521da177e4SLinus Torvalds out_udp: 16531da177e4SLinus Torvalds tcp4_proc_exit(); 16541da177e4SLinus Torvalds out_tcp: 16551da177e4SLinus Torvalds raw_proc_exit(); 16561da177e4SLinus Torvalds out_raw: 16571da177e4SLinus Torvalds rc = -ENOMEM; 16581da177e4SLinus Torvalds goto out; 16591da177e4SLinus Torvalds } 16601da177e4SLinus Torvalds 16611da177e4SLinus Torvalds #else /* CONFIG_PROC_FS */ 16621da177e4SLinus Torvalds static int __init ipv4_proc_init(void) 16631da177e4SLinus Torvalds { 16641da177e4SLinus Torvalds return 0; 16651da177e4SLinus Torvalds } 16661da177e4SLinus Torvalds #endif /* CONFIG_PROC_FS */ 16671da177e4SLinus Torvalds 16681da177e4SLinus Torvalds MODULE_ALIAS_NETPROTO(PF_INET); 16691da177e4SLinus Torvalds 16701da177e4SLinus Torvalds EXPORT_SYMBOL(inet_accept); 16711da177e4SLinus Torvalds EXPORT_SYMBOL(inet_bind); 16721da177e4SLinus Torvalds EXPORT_SYMBOL(inet_dgram_connect); 16731da177e4SLinus Torvalds EXPORT_SYMBOL(inet_dgram_ops); 16741da177e4SLinus Torvalds EXPORT_SYMBOL(inet_getname); 16751da177e4SLinus Torvalds EXPORT_SYMBOL(inet_ioctl); 16761da177e4SLinus Torvalds EXPORT_SYMBOL(inet_listen); 16771da177e4SLinus Torvalds EXPORT_SYMBOL(inet_register_protosw); 16781da177e4SLinus Torvalds EXPORT_SYMBOL(inet_release); 16791da177e4SLinus Torvalds EXPORT_SYMBOL(inet_sendmsg); 16801da177e4SLinus Torvalds EXPORT_SYMBOL(inet_shutdown); 16811da177e4SLinus Torvalds EXPORT_SYMBOL(inet_sock_destruct); 16821da177e4SLinus Torvalds EXPORT_SYMBOL(inet_stream_connect); 16831da177e4SLinus Torvalds EXPORT_SYMBOL(inet_stream_ops); 16841da177e4SLinus Torvalds EXPORT_SYMBOL(inet_unregister_protosw); 1685cdac4e07SNeil Horman EXPORT_SYMBOL(sysctl_ip_nonlocal_bind); 1686