2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * PF_INET protocol family socket handler.
8 * Version: $Id: af_inet.c,v 1.137 2002/02/01 22:01:03 davem Exp $
10 * Authors: Ross Biro, <bir7@leland.Stanford.Edu>
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Florian La Roche, <flla@stud.uni-sb.de>
13 * Alan Cox, <A.Cox@swansea.ac.uk>
15 * Changes (see also sock.c)
18 * Karl Knutson : Socket protocol table
19 * A.N.Kuznetsov : Socket death error in accept().
20 * John Richardson : Fix non blocking error in connect()
21 * so sockets that fail to connect
22 * don't return -EINPROGRESS.
23 * Alan Cox : Asynchronous I/O support
24 * Alan Cox : Keep correct socket pointer on sock
27 * Alan Cox : Semantics of SO_LINGER aren't state
28 * moved to close when you look carefully.
29 * With this fixed and the accept bug fixed
30 * some RPC stuff seems happier.
31 * Niibe Yutaka : 4.4BSD style write async I/O
33 * Tony Gale : Fixed reuse semantics.
34 * Alan Cox : bind() shouldn't abort existing but dead
35 * sockets. Stops FTP netin:.. I hope.
36 * Alan Cox : bind() works correctly for RAW sockets.
37 * Note that FreeBSD at least was broken
38 * in this respect so be careful with
39 * compatibility tests...
40 * Alan Cox : routing cache support
41 * Alan Cox : memzero the socket structure for
43 * Matt Day : nonblock connect error handler
44 * Alan Cox : Allow large numbers of pending sockets
45 * (eg for big web sites), but only if
46 * specifically application requested.
47 * Alan Cox : New buffering throughout IP. Used
49 * Alan Cox : New buffering now used smartly.
50 * Alan Cox : BSD rather than common sense
51 * interpretation of listen.
52 * Germano Caronni : Assorted small races.
53 * Alan Cox : sendmsg/recvmsg basic support.
54 * Alan Cox : Only sendmsg/recvmsg now supported.
55 * Alan Cox : Locked down bind (see security list).
56 * Alan Cox : Loosened bind a little.
57 * Mike McLagan : ADD/DEL DLCI Ioctls
58 * Willy Konynenberg : Transparent proxying support.
59 * David S. Miller : New socket lookup architecture.
60 * Some other random speedups.
61 * Cyrus Durgin : Cleaned up file for kmod hacks.
62 * Andi Kleen : Fix inet_stream_connect TCP race.
64 * This program is free software; you can redistribute it and/or
65 * modify it under the terms of the GNU General Public License
66 * as published by the Free Software Foundation; either version
67 * 2 of the License, or (at your option) any later version.
70 #include <linux/config.h>
71 #include <linux/errno.h>
72 #include <linux/types.h>
73 #include <linux/socket.h>
75 #include <linux/kernel.h>
76 #include <linux/major.h>
77 #include <linux/module.h>
78 #include <linux/sched.h>
79 #include <linux/timer.h>
80 #include <linux/string.h>
81 #include <linux/sockios.h>
82 #include <linux/net.h>
83 #include <linux/fcntl.h>
85 #include <linux/interrupt.h>
86 #include <linux/stat.h>
87 #include <linux/init.h>
88 #include <linux/poll.h>
89 #include <linux/netfilter_ipv4.h>
91 #include <asm/uaccess.h>
92 #include <asm/system.h>
94 #include <linux/smp_lock.h>
95 #include <linux/inet.h>
96 #include <linux/igmp.h>
97 #include <linux/netdevice.h>
99 #include <net/protocol.h>
101 #include <net/route.h>
102 #include <net/ip_fib.h>
105 #include <linux/skbuff.h>
106 #include <net/sock.h>
108 #include <net/icmp.h>
109 #include <net/ipip.h>
110 #include <net/inet_common.h>
111 #include <net/xfrm.h>
112 #ifdef CONFIG_IP_MROUTE
113 #include <linux/mroute.h>
116 DEFINE_SNMP_STAT(struct linux_mib, net_statistics);
118 #ifdef INET_REFCNT_DEBUG
119 atomic_t inet_sock_nr;
122 extern void ip_mc_drop_socket(struct sock *sk);
124 /* Per protocol sock slabcache */
125 kmem_cache_t *tcp_sk_cachep;
126 static kmem_cache_t *udp_sk_cachep;
127 static kmem_cache_t *raw4_sk_cachep;
129 /* The inetsw table contains everything that inet_create needs to
130 * build a new socket.
132 static struct list_head inetsw[SOCK_MAX];
133 static spinlock_t inetsw_lock = SPIN_LOCK_UNLOCKED;
135 /* New destruction routine */
137 void inet_sock_destruct(struct sock *sk)
139 struct inet_opt *inet = inet_sk(sk);
141 __skb_queue_purge(&sk->sk_receive_queue);
142 __skb_queue_purge(&sk->sk_error_queue);
144 if (sk->sk_type == SOCK_STREAM && sk->sk_state != TCP_CLOSE) {
145 printk("Attempt to release TCP socket in state %d %p\n",
149 if (!sock_flag(sk, SOCK_DEAD)) {
150 printk("Attempt to release alive inet socket %p\n", sk);
154 BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
155 BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
156 BUG_TRAP(!sk->sk_wmem_queued);
157 BUG_TRAP(!sk->sk_forward_alloc);
161 dst_release(sk->sk_dst_cache);
162 #ifdef INET_REFCNT_DEBUG
163 atomic_dec(&inet_sock_nr);
164 printk(KERN_DEBUG "INET socket %p released, %d are still alive\n",
165 sk, atomic_read(&inet_sock_nr));
170 * The routines beyond this point handle the behaviour of an AF_INET
171 * socket object. Mostly it punts to the subprotocols of IP to do
176 * Automatically bind an unbound socket.
179 static int inet_autobind(struct sock *sk)
181 struct inet_opt *inet;
182 /* We may need to bind the socket. */
186 if (sk->sk_prot->get_port(sk, 0)) {
190 inet->sport = htons(inet->num);
197 * Move a socket into listening state.
199 int inet_listen(struct socket *sock, int backlog)
201 struct sock *sk = sock->sk;
202 unsigned char old_state;
208 if (sock->state != SS_UNCONNECTED || sock->type != SOCK_STREAM)
211 old_state = sk->sk_state;
212 if (!((1 << old_state) & (TCPF_CLOSE | TCPF_LISTEN)))
215 /* Really, if the socket is already in listen state
216 * we can only allow the backlog to be adjusted.
218 if (old_state != TCP_LISTEN) {
219 err = tcp_listen_start(sk);
223 sk->sk_max_ack_backlog = backlog;
231 static __inline__ kmem_cache_t *inet_sk_slab(int protocol)
233 kmem_cache_t* rc = tcp_sk_cachep;
235 if (protocol == IPPROTO_UDP)
237 else if (protocol == IPPROTO_RAW)
242 static __inline__ int inet_sk_size(int protocol)
244 int rc = sizeof(struct tcp_sock);
246 if (protocol == IPPROTO_UDP)
247 rc = sizeof(struct udp_sock);
248 else if (protocol == IPPROTO_RAW)
249 rc = sizeof(struct raw_sock);
254 * Create an inet socket.
257 static int inet_create(struct socket *sock, int protocol)
261 struct inet_protosw *answer;
262 struct inet_opt *inet;
265 sock->state = SS_UNCONNECTED;
266 sk = sk_alloc(PF_INET, GFP_KERNEL, inet_sk_size(protocol),
267 inet_sk_slab(protocol));
271 /* Look for the requested type/protocol pair. */
274 list_for_each_rcu(p, &inetsw[sock->type]) {
275 answer = list_entry(p, struct inet_protosw, list);
277 /* Check the non-wild match. */
278 if (protocol == answer->protocol) {
279 if (protocol != IPPROTO_IP)
282 /* Check for the two wild cases. */
283 if (IPPROTO_IP == protocol) {
284 protocol = answer->protocol;
287 if (IPPROTO_IP == answer->protocol)
293 err = -ESOCKTNOSUPPORT;
297 if (answer->capability > 0 && !capable(answer->capability))
299 err = -EPROTONOSUPPORT;
303 sock->ops = answer->ops;
304 sk->sk_prot = answer->prot;
305 sk->sk_no_check = answer->no_check;
306 if (INET_PROTOSW_REUSE & answer->flags)
312 if (SOCK_RAW == sock->type) {
313 inet->num = protocol;
314 if (IPPROTO_RAW == protocol)
318 if (ipv4_config.no_pmtu_disc)
319 inet->pmtudisc = IP_PMTUDISC_DONT;
321 inet->pmtudisc = IP_PMTUDISC_WANT;
325 sock_init_data(sock, sk);
326 sk_set_owner(sk, THIS_MODULE);
328 sk->sk_destruct = inet_sock_destruct;
330 sk->sk_family = PF_INET;
331 sk->sk_protocol = protocol;
332 sk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
338 inet->mc_list = NULL;
340 #ifdef INET_REFCNT_DEBUG
341 atomic_inc(&inet_sock_nr);
345 /* It assumes that any protocol which allows
346 * the user to assign a number at socket
347 * creation time automatically
350 inet->sport = htons(inet->num);
351 /* Add to protocol hash chains. */
352 sk->sk_prot->hash(sk);
355 if (sk->sk_prot->init) {
356 err = sk->sk_prot->init(sk);
358 sk_common_release(sk);
370 * The peer socket should always be NULL (or else). When we call this
371 * function we are destroying the object and from then on nobody
372 * should refer to it.
374 int inet_release(struct socket *sock)
376 struct sock *sk = sock->sk;
381 /* Applications forget to leave groups before exiting */
382 ip_mc_drop_socket(sk);
384 /* If linger is set, we don't return until the close
385 * is complete. Otherwise we return immediately. The
386 * actually closing is done the same either way.
388 * If the close is due to the process exiting, we never
392 if (sock_flag(sk, SOCK_LINGER) &&
393 !(current->flags & PF_EXITING))
394 timeout = sk->sk_lingertime;
396 sk->sk_prot->close(sk, timeout);
401 /* It is off by default, see below. */
402 int sysctl_ip_nonlocal_bind;
404 int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
406 struct sockaddr_in *addr = (struct sockaddr_in *)uaddr;
407 struct sock *sk = sock->sk;
408 struct inet_opt *inet = inet_sk(sk);
413 /* If the socket has its own bind function then use it. (RAW) */
414 if (sk->sk_prot->bind) {
415 err = sk->sk_prot->bind(sk, uaddr, addr_len);
419 if (addr_len < sizeof(struct sockaddr_in))
422 chk_addr_ret = inet_addr_type(addr->sin_addr.s_addr);
424 /* Not specified by any standard per-se, however it breaks too
425 * many applications when removed. It is unfortunate since
426 * allowing applications to make a non-local bind solves
427 * several problems with systems using dynamic addressing.
428 * (ie. your servers still start up even if your ISDN link
429 * is temporarily down)
431 err = -EADDRNOTAVAIL;
432 if (!sysctl_ip_nonlocal_bind &&
434 addr->sin_addr.s_addr != INADDR_ANY &&
435 chk_addr_ret != RTN_LOCAL &&
436 chk_addr_ret != RTN_MULTICAST &&
437 chk_addr_ret != RTN_BROADCAST)
440 snum = ntohs(addr->sin_port);
442 if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
445 /* We keep a pair of addresses. rcv_saddr is the one
446 * used by hash lookups, and saddr is used for transmit.
448 * In the BSD API these are the same except where it
449 * would be illegal to use them (multicast/broadcast) in
450 * which case the sending device address is used.
454 /* Check these errors (active socket, double bind). */
456 if (sk->sk_state != TCP_CLOSE || inet->num)
457 goto out_release_sock;
459 inet->rcv_saddr = inet->saddr = addr->sin_addr.s_addr;
460 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
461 inet->saddr = 0; /* Use device */
463 /* Make sure we are allowed to bind here. */
464 if (sk->sk_prot->get_port(sk, snum)) {
465 inet->saddr = inet->rcv_saddr = 0;
467 goto out_release_sock;
471 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
473 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
474 inet->sport = htons(inet->num);
485 int inet_dgram_connect(struct socket *sock, struct sockaddr * uaddr,
486 int addr_len, int flags)
488 struct sock *sk = sock->sk;
490 if (uaddr->sa_family == AF_UNSPEC)
491 return sk->sk_prot->disconnect(sk, flags);
493 if (!inet_sk(sk)->num && inet_autobind(sk))
495 return sk->sk_prot->connect(sk, (struct sockaddr *)uaddr, addr_len);
498 static long inet_wait_for_connect(struct sock *sk, long timeo)
502 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
504 /* Basic assumption: if someone sets sk->sk_err, he _must_
505 * change state of the socket from TCP_SYN_*.
506 * Connect() does not allow to get error notifications
507 * without closing the socket.
509 while ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) {
511 timeo = schedule_timeout(timeo);
513 if (signal_pending(current) || !timeo)
515 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
517 finish_wait(sk->sk_sleep, &wait);
522 * Connect to a remote host. There is regrettably still a little
523 * TCP 'magic' in here.
525 int inet_stream_connect(struct socket *sock, struct sockaddr *uaddr,
526 int addr_len, int flags)
528 struct sock *sk = sock->sk;
534 if (uaddr->sa_family == AF_UNSPEC) {
535 err = sk->sk_prot->disconnect(sk, flags);
536 sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED;
540 switch (sock->state) {
549 /* Fall out of switch with err, set for this state */
553 if (sk->sk_state != TCP_CLOSE)
556 err = sk->sk_prot->connect(sk, uaddr, addr_len);
560 sock->state = SS_CONNECTING;
562 /* Just entered SS_CONNECTING state; the only
563 * difference is that return value in non-blocking
564 * case is EINPROGRESS, rather than EALREADY.
570 timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
572 if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) {
573 /* Error code is set above */
574 if (!timeo || !inet_wait_for_connect(sk, timeo))
577 err = sock_intr_errno(timeo);
578 if (signal_pending(current))
582 /* Connection was closed by RST, timeout, ICMP error
583 * or another process disconnected us.
585 if (sk->sk_state == TCP_CLOSE)
588 /* sk->sk_err may be not zero now, if RECVERR was ordered by user
589 * and error was received after socket entered established state.
590 * Hence, it is handled normally after connect() return successfully.
593 sock->state = SS_CONNECTED;
600 err = sock_error(sk) ? : -ECONNABORTED;
601 sock->state = SS_UNCONNECTED;
602 if (sk->sk_prot->disconnect(sk, flags))
603 sock->state = SS_DISCONNECTING;
608 * Accept a pending connection. The TCP layer now gives BSD semantics.
611 int inet_accept(struct socket *sock, struct socket *newsock, int flags)
613 struct sock *sk1 = sock->sk;
615 struct sock *sk2 = sk1->sk_prot->accept(sk1, flags, &err);
622 BUG_TRAP((1 << sk2->sk_state) &
623 (TCPF_ESTABLISHED | TCPF_CLOSE_WAIT | TCPF_CLOSE));
625 sock_graft(sk2, newsock);
627 newsock->state = SS_CONNECTED;
636 * This does both peername and sockname.
638 int inet_getname(struct socket *sock, struct sockaddr *uaddr,
639 int *uaddr_len, int peer)
641 struct sock *sk = sock->sk;
642 struct inet_opt *inet = inet_sk(sk);
643 struct sockaddr_in *sin = (struct sockaddr_in *)uaddr;
645 sin->sin_family = AF_INET;
648 (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
651 sin->sin_port = inet->dport;
652 sin->sin_addr.s_addr = inet->daddr;
654 __u32 addr = inet->rcv_saddr;
657 sin->sin_port = inet->sport;
658 sin->sin_addr.s_addr = addr;
660 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
661 *uaddr_len = sizeof(*sin);
665 int inet_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
668 struct sock *sk = sock->sk;
670 /* We may need to bind the socket. */
671 if (!inet_sk(sk)->num && inet_autobind(sk))
674 return sk->sk_prot->sendmsg(iocb, sk, msg, size);
678 ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset, size_t size, int flags)
680 struct sock *sk = sock->sk;
682 /* We may need to bind the socket. */
683 if (!inet_sk(sk)->num && inet_autobind(sk))
686 if (sk->sk_prot->sendpage)
687 return sk->sk_prot->sendpage(sk, page, offset, size, flags);
688 return sock_no_sendpage(sock, page, offset, size, flags);
692 int inet_shutdown(struct socket *sock, int how)
694 struct sock *sk = sock->sk;
697 /* This should really check to make sure
698 * the socket is a TCP socket. (WHY AC...)
700 how++; /* maps 0->1 has the advantage of making bit 1 rcvs and
703 if ((how & ~SHUTDOWN_MASK) || !how) /* MAXINT->0 */
707 if (sock->state == SS_CONNECTING) {
708 if ((1 << sk->sk_state) &
709 (TCPF_SYN_SENT | TCPF_SYN_RECV | TCPF_CLOSE))
710 sock->state = SS_DISCONNECTING;
712 sock->state = SS_CONNECTED;
715 switch (sk->sk_state) {
718 /* Hack to wake up other listeners, who can poll for
719 POLLHUP, even on eg. unconnected UDP sockets -- RR */
721 sk->sk_shutdown |= how;
722 if (sk->sk_prot->shutdown)
723 sk->sk_prot->shutdown(sk, how);
726 /* Remaining two branches are temporary solution for missing
727 * close() in multithreaded environment. It is _not_ a good idea,
728 * but we have no choice until close() is repaired at VFS level.
731 if (!(how & RCV_SHUTDOWN))
735 err = sk->sk_prot->disconnect(sk, O_NONBLOCK);
736 sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED;
740 /* Wake up anyone sleeping in poll. */
741 sk->sk_state_change(sk);
746 #if defined(CONFIG_MIPS_BRCM)
747 #define SIOCGEXTIF 0x8908
751 * ioctl() calls you can issue on an INET socket. Most of these are
752 * device configuration and stuff and very rarely used. Some ioctls
753 * pass on to the socket itself.
755 * NOTE: I like the idea of a module for the config stuff. ie ifconfig
756 * loads the devconfigure module does its configuring and unloads it.
757 * There's a good 20K of config code hanging around the kernel.
760 int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
762 struct sock *sk = sock->sk;
767 err = sock_get_timestamp(sk, (struct timeval __user *)arg);
772 err = ip_rt_ioctl(cmd, (void __user *)arg);
777 err = arp_ioctl(cmd, (void __user *)arg);
779 #if defined(CONFIG_MIPS_BRCM)
781 err = sock_get_extif(sk, (char __user *)arg);
795 err = devinet_ioctl(cmd, (void __user *)arg);
798 if (!sk->sk_prot->ioctl ||
799 (err = sk->sk_prot->ioctl(sk, cmd, arg)) ==
801 err = dev_ioctl(cmd, (void __user *)arg);
807 struct proto_ops inet_stream_ops = {
809 .owner = THIS_MODULE,
810 .release = inet_release,
812 .connect = inet_stream_connect,
813 .socketpair = sock_no_socketpair,
814 .accept = inet_accept,
815 .getname = inet_getname,
818 .listen = inet_listen,
819 .shutdown = inet_shutdown,
820 .setsockopt = sock_common_setsockopt,
821 .getsockopt = sock_common_getsockopt,
822 .sendmsg = inet_sendmsg,
823 .recvmsg = sock_common_recvmsg,
824 .mmap = sock_no_mmap,
825 .sendpage = tcp_sendpage
828 struct proto_ops inet_dgram_ops = {
830 .owner = THIS_MODULE,
831 .release = inet_release,
833 .connect = inet_dgram_connect,
834 .socketpair = sock_no_socketpair,
835 .accept = sock_no_accept,
836 .getname = inet_getname,
837 .poll = datagram_poll,
839 .listen = sock_no_listen,
840 .shutdown = inet_shutdown,
841 .setsockopt = sock_common_setsockopt,
842 .getsockopt = sock_common_getsockopt,
843 .sendmsg = inet_sendmsg,
844 .recvmsg = sock_common_recvmsg,
845 .mmap = sock_no_mmap,
846 .sendpage = inet_sendpage,
849 struct net_proto_family inet_family_ops = {
851 .create = inet_create,
852 .owner = THIS_MODULE,
856 extern void tcp_init(void);
857 extern void tcp_v4_init(struct net_proto_family *);
859 /* Upon startup we insert all the elements in inetsw_array[] into
860 * the linked list inetsw.
862 static struct inet_protosw inetsw_array[] =
866 .protocol = IPPROTO_TCP,
868 .ops = &inet_stream_ops,
871 .flags = INET_PROTOSW_PERMANENT,
876 .protocol = IPPROTO_UDP,
878 .ops = &inet_dgram_ops,
880 .no_check = UDP_CSUM_DEFAULT,
881 .flags = INET_PROTOSW_PERMANENT,
887 .protocol = IPPROTO_IP, /* wild card */
889 .ops = &inet_dgram_ops,
890 .capability = CAP_NET_RAW,
891 .no_check = UDP_CSUM_DEFAULT,
892 .flags = INET_PROTOSW_REUSE,
896 #define INETSW_ARRAY_LEN (sizeof(inetsw_array) / sizeof(struct inet_protosw))
898 void inet_register_protosw(struct inet_protosw *p)
900 struct list_head *lh;
901 struct inet_protosw *answer;
902 int protocol = p->protocol;
903 struct list_head *last_perm;
905 spin_lock_bh(&inetsw_lock);
907 if (p->type >= SOCK_MAX)
910 /* If we are trying to override a permanent protocol, bail. */
912 last_perm = &inetsw[p->type];
913 list_for_each(lh, &inetsw[p->type]) {
914 answer = list_entry(lh, struct inet_protosw, list);
916 /* Check only the non-wild match. */
917 if (INET_PROTOSW_PERMANENT & answer->flags) {
918 if (protocol == answer->protocol)
928 /* Add the new entry after the last permanent entry if any, so that
929 * the new entry does not override a permanent entry when matched with
930 * a wild-card protocol. But it is allowed to override any existing
931 * non-permanent entry. This means that when we remove this entry, the
932 * system automatically returns to the old behavior.
934 list_add_rcu(&p->list, last_perm);
936 spin_unlock_bh(&inetsw_lock);
943 printk(KERN_ERR "Attempt to override permanent protocol %d.\n",
949 "Ignoring attempt to register invalid socket type %d.\n",
954 void inet_unregister_protosw(struct inet_protosw *p)
956 if (INET_PROTOSW_PERMANENT & p->flags) {
958 "Attempt to unregister permanent protocol %d.\n",
961 spin_lock_bh(&inetsw_lock);
962 list_del_rcu(&p->list);
963 spin_unlock_bh(&inetsw_lock);
969 #ifdef CONFIG_IP_MULTICAST
970 static struct net_protocol igmp_protocol = {
975 static struct net_protocol tcp_protocol = {
976 .handler = tcp_v4_rcv,
977 .err_handler = tcp_v4_err,
981 static struct net_protocol udp_protocol = {
983 .err_handler = udp_err,
987 static struct net_protocol icmp_protocol = {
991 static int __init init_ipv4_mibs(void)
993 net_statistics[0] = alloc_percpu(struct linux_mib);
994 net_statistics[1] = alloc_percpu(struct linux_mib);
995 ip_statistics[0] = alloc_percpu(struct ipstats_mib);
996 ip_statistics[1] = alloc_percpu(struct ipstats_mib);
997 icmp_statistics[0] = alloc_percpu(struct icmp_mib);
998 icmp_statistics[1] = alloc_percpu(struct icmp_mib);
999 tcp_statistics[0] = alloc_percpu(struct tcp_mib);
1000 tcp_statistics[1] = alloc_percpu(struct tcp_mib);
1001 udp_statistics[0] = alloc_percpu(struct udp_mib);
1002 udp_statistics[1] = alloc_percpu(struct udp_mib);
1004 (net_statistics[0] && net_statistics[1] && ip_statistics[0]
1005 && ip_statistics[1] && tcp_statistics[0] && tcp_statistics[1]
1006 && udp_statistics[0] && udp_statistics[1]))
1009 (void) tcp_mib_init();
1014 int ipv4_proc_init(void);
1015 extern void ipfrag_init(void);
1017 static int __init inet_init(void)
1019 struct sk_buff *dummy_skb;
1020 struct inet_protosw *q;
1021 struct list_head *r;
1023 if (sizeof(struct inet_skb_parm) > sizeof(dummy_skb->cb)) {
1024 printk(KERN_CRIT "%s: panic\n", __FUNCTION__);
1028 tcp_sk_cachep = kmem_cache_create("tcp_sock",
1029 sizeof(struct tcp_sock), 0,
1030 SLAB_HWCACHE_ALIGN, NULL, NULL);
1031 udp_sk_cachep = kmem_cache_create("udp_sock",
1032 sizeof(struct udp_sock), 0,
1033 SLAB_HWCACHE_ALIGN, NULL, NULL);
1034 raw4_sk_cachep = kmem_cache_create("raw4_sock",
1035 sizeof(struct raw_sock), 0,
1036 SLAB_HWCACHE_ALIGN, NULL, NULL);
1037 if (!tcp_sk_cachep || !udp_sk_cachep || !raw4_sk_cachep)
1039 "inet_init: Can't create protocol sock SLAB caches!\n");
1041 * Tell SOCKET that we are alive...
1044 (void)sock_register(&inet_family_ops);
1047 * Add all the base protocols.
1050 if (inet_add_protocol(&icmp_protocol, IPPROTO_ICMP) < 0)
1051 printk(KERN_CRIT "inet_init: Cannot add ICMP protocol\n");
1052 if (inet_add_protocol(&udp_protocol, IPPROTO_UDP) < 0)
1053 printk(KERN_CRIT "inet_init: Cannot add UDP protocol\n");
1054 if (inet_add_protocol(&tcp_protocol, IPPROTO_TCP) < 0)
1055 printk(KERN_CRIT "inet_init: Cannot add TCP protocol\n");
1056 #ifdef CONFIG_IP_MULTICAST
1057 if (inet_add_protocol(&igmp_protocol, IPPROTO_IGMP) < 0)
1058 printk(KERN_CRIT "inet_init: Cannot add IGMP protocol\n");
1061 /* Register the socket-side information for inet_create. */
1062 for (r = &inetsw[0]; r < &inetsw[SOCK_MAX]; ++r)
1065 for (q = inetsw_array; q < &inetsw_array[INETSW_ARRAY_LEN]; ++q)
1066 inet_register_protosw(q);
1069 * Set the ARP module up
1075 * Set the IP module up
1080 tcp_v4_init(&inet_family_ops);
1082 /* Setup TCP slab cache for open requests. */
1087 * Set the ICMP layer up
1090 icmp_init(&inet_family_ops);
1093 * Initialise the multicast router
1095 #if defined(CONFIG_IP_MROUTE)
1099 * Initialise per-cpu ipv4 mibs
1102 if(init_ipv4_mibs())
1103 printk(KERN_CRIT "inet_init: Cannot init ipv4 mibs\n"); ;
1112 module_init(inet_init);
1114 /* ------------------------------------------------------------------------ */
1116 #ifdef CONFIG_PROC_FS
1117 extern int fib_proc_init(void);
1118 extern void fib_proc_exit(void);
1119 extern int ip_misc_proc_init(void);
1120 extern int raw_proc_init(void);
1121 extern void raw_proc_exit(void);
1122 extern int tcp4_proc_init(void);
1123 extern void tcp4_proc_exit(void);
1124 extern int udp4_proc_init(void);
1125 extern void udp4_proc_exit(void);
1127 int __init ipv4_proc_init(void)
1131 if (raw_proc_init())
1133 if (tcp4_proc_init())
1135 if (udp4_proc_init())
1137 if (fib_proc_init())
1139 if (ip_misc_proc_init())
1156 #else /* CONFIG_PROC_FS */
1157 int __init ipv4_proc_init(void)
1161 #endif /* CONFIG_PROC_FS */
1163 MODULE_ALIAS_NETPROTO(PF_INET);
1165 EXPORT_SYMBOL(inet_accept);
1166 EXPORT_SYMBOL(inet_bind);
1167 EXPORT_SYMBOL(inet_dgram_connect);
1168 EXPORT_SYMBOL(inet_dgram_ops);
1169 EXPORT_SYMBOL(inet_family_ops);
1170 EXPORT_SYMBOL(inet_getname);
1171 EXPORT_SYMBOL(inet_ioctl);
1172 EXPORT_SYMBOL(inet_listen);
1173 EXPORT_SYMBOL(inet_register_protosw);
1174 EXPORT_SYMBOL(inet_release);
1175 EXPORT_SYMBOL(inet_sendmsg);
1176 EXPORT_SYMBOL(inet_shutdown);
1177 EXPORT_SYMBOL(inet_sock_destruct);
1178 EXPORT_SYMBOL(inet_stream_connect);
1179 EXPORT_SYMBOL(inet_stream_ops);
1180 EXPORT_SYMBOL(inet_unregister_protosw);
1181 EXPORT_SYMBOL(net_statistics);
1182 EXPORT_SYMBOL(tcp_protocol);
1183 EXPORT_SYMBOL(udp_protocol);
1185 #ifdef INET_REFCNT_DEBUG
1186 EXPORT_SYMBOL(inet_sock_nr);