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.
9 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
10 * Florian La Roche, <flla@stud.uni-sb.de>
11 * Alan Cox, <A.Cox@swansea.ac.uk>
13 * Changes (see also sock.c)
16 * Karl Knutson : Socket protocol table
17 * A.N.Kuznetsov : Socket death error in accept().
18 * John Richardson : Fix non blocking error in connect()
19 * so sockets that fail to connect
20 * don't return -EINPROGRESS.
21 * Alan Cox : Asynchronous I/O support
22 * Alan Cox : Keep correct socket pointer on sock
25 * Alan Cox : Semantics of SO_LINGER aren't state
26 * moved to close when you look carefully.
27 * With this fixed and the accept bug fixed
28 * some RPC stuff seems happier.
29 * Niibe Yutaka : 4.4BSD style write async I/O
31 * Tony Gale : Fixed reuse semantics.
32 * Alan Cox : bind() shouldn't abort existing but dead
33 * sockets. Stops FTP netin:.. I hope.
34 * Alan Cox : bind() works correctly for RAW sockets.
35 * Note that FreeBSD at least was broken
36 * in this respect so be careful with
37 * compatibility tests...
38 * Alan Cox : routing cache support
39 * Alan Cox : memzero the socket structure for
41 * Matt Day : nonblock connect error handler
42 * Alan Cox : Allow large numbers of pending sockets
43 * (eg for big web sites), but only if
44 * specifically application requested.
45 * Alan Cox : New buffering throughout IP. Used
47 * Alan Cox : New buffering now used smartly.
48 * Alan Cox : BSD rather than common sense
49 * interpretation of listen.
50 * Germano Caronni : Assorted small races.
51 * Alan Cox : sendmsg/recvmsg basic support.
52 * Alan Cox : Only sendmsg/recvmsg now supported.
53 * Alan Cox : Locked down bind (see security list).
54 * Alan Cox : Loosened bind a little.
55 * Mike McLagan : ADD/DEL DLCI Ioctls
56 * Willy Konynenberg : Transparent proxying support.
57 * David S. Miller : New socket lookup architecture.
58 * Some other random speedups.
59 * Cyrus Durgin : Cleaned up file for kmod hacks.
60 * Andi Kleen : Fix inet_stream_connect TCP race.
62 * This program is free software; you can redistribute it and/or
63 * modify it under the terms of the GNU General Public License
64 * as published by the Free Software Foundation; either version
65 * 2 of the License, or (at your option) any later version.
68 #include <linux/err.h>
69 #include <linux/errno.h>
70 #include <linux/types.h>
71 #include <linux/socket.h>
73 #include <linux/kernel.h>
74 #include <linux/module.h>
75 #include <linux/sched.h>
76 #include <linux/timer.h>
77 #include <linux/string.h>
78 #include <linux/sockios.h>
79 #include <linux/net.h>
80 #include <linux/capability.h>
81 #include <linux/fcntl.h>
83 #include <linux/interrupt.h>
84 #include <linux/stat.h>
85 #include <linux/init.h>
86 #include <linux/poll.h>
87 #include <linux/netfilter_ipv4.h>
88 #include <linux/random.h>
89 #include <linux/slab.h>
91 #include <asm/uaccess.h>
92 #include <asm/system.h>
94 #include <linux/inet.h>
95 #include <linux/igmp.h>
96 #include <linux/inetdevice.h>
97 #include <linux/netdevice.h>
98 #include <net/checksum.h>
100 #include <net/protocol.h>
102 #include <net/route.h>
103 #include <net/ip_fib.h>
104 #include <net/inet_connection_sock.h>
107 #include <net/udplite.h>
108 #include <linux/skbuff.h>
109 #include <net/sock.h>
111 #include <net/icmp.h>
112 #include <net/ipip.h>
113 #include <net/inet_common.h>
114 #include <net/xfrm.h>
115 #include <net/net_namespace.h>
116 #ifdef CONFIG_IP_MROUTE
117 #include <linux/mroute.h>
120 #include <typedefs.h>
123 /* The inetsw table contains everything that inet_create needs to
124 * build a new socket.
126 static struct list_head inetsw
[SOCK_MAX
];
127 static DEFINE_SPINLOCK(inetsw_lock
);
129 struct ipv4_config ipv4_config
;
130 EXPORT_SYMBOL(ipv4_config
);
132 /* New destruction routine */
134 void inet_sock_destruct(struct sock
*sk
)
136 struct inet_sock
*inet
= inet_sk(sk
);
138 __skb_queue_purge(&sk
->sk_receive_queue
);
139 __skb_queue_purge(&sk
->sk_error_queue
);
143 if (sk
->sk_type
== SOCK_STREAM
&& sk
->sk_state
!= TCP_CLOSE
) {
144 pr_err("Attempt to release TCP socket in state %d %p\n",
148 if (!sock_flag(sk
, SOCK_DEAD
)) {
149 pr_err("Attempt to release alive inet socket %p\n", sk
);
153 WARN_ON(atomic_read(&sk
->sk_rmem_alloc
));
154 WARN_ON(atomic_read(&sk
->sk_wmem_alloc
));
155 WARN_ON(sk
->sk_wmem_queued
);
156 WARN_ON(sk
->sk_forward_alloc
);
159 dst_release(rcu_dereference_check(sk
->sk_dst_cache
, 1));
160 sk_refcnt_debug_dec(sk
);
162 EXPORT_SYMBOL(inet_sock_destruct
);
165 * The routines beyond this point handle the behaviour of an AF_INET
166 * socket object. Mostly it punts to the subprotocols of IP to do
171 * Automatically bind an unbound socket.
174 static int inet_autobind(struct sock
*sk
)
176 struct inet_sock
*inet
;
177 /* We may need to bind the socket. */
180 if (!inet
->inet_num
) {
181 if (sk
->sk_prot
->get_port(sk
, 0)) {
185 inet
->inet_sport
= htons(inet
->inet_num
);
192 * Move a socket into listening state.
194 int inet_listen(struct socket
*sock
, int backlog
)
196 struct sock
*sk
= sock
->sk
;
197 unsigned char old_state
;
203 if (sock
->state
!= SS_UNCONNECTED
|| sock
->type
!= SOCK_STREAM
)
206 old_state
= sk
->sk_state
;
207 if (!((1 << old_state
) & (TCPF_CLOSE
| TCPF_LISTEN
)))
210 /* Really, if the socket is already in listen state
211 * we can only allow the backlog to be adjusted.
213 if (old_state
!= TCP_LISTEN
) {
214 err
= inet_csk_listen_start(sk
, backlog
);
218 sk
->sk_max_ack_backlog
= backlog
;
225 EXPORT_SYMBOL(inet_listen
);
227 u32 inet_ehash_secret __read_mostly
;
228 EXPORT_SYMBOL(inet_ehash_secret
);
231 * inet_ehash_secret must be set exactly once
232 * Instead of using a dedicated spinlock, we (ab)use inetsw_lock
234 void build_ehash_secret(void)
238 get_random_bytes(&rnd
, sizeof(rnd
));
240 spin_lock_bh(&inetsw_lock
);
241 if (!inet_ehash_secret
)
242 inet_ehash_secret
= rnd
;
243 spin_unlock_bh(&inetsw_lock
);
245 EXPORT_SYMBOL(build_ehash_secret
);
247 static inline int inet_netns_ok(struct net
*net
, int protocol
)
250 const struct net_protocol
*ipprot
;
252 if (net_eq(net
, &init_net
))
255 hash
= protocol
& (MAX_INET_PROTOS
- 1);
256 ipprot
= rcu_dereference(inet_protos
[hash
]);
261 return ipprot
->netns_ok
;
265 * Create an inet socket.
268 static int inet_create(struct net
*net
, struct socket
*sock
, int protocol
,
272 struct inet_protosw
*answer
;
273 struct inet_sock
*inet
;
274 struct proto
*answer_prot
;
275 unsigned char answer_flags
;
276 char answer_no_check
;
277 int try_loading_module
= 0;
280 if (unlikely(!inet_ehash_secret
))
281 if (sock
->type
!= SOCK_RAW
&& sock
->type
!= SOCK_DGRAM
)
282 build_ehash_secret();
284 sock
->state
= SS_UNCONNECTED
;
286 /* Look for the requested type/protocol pair. */
288 err
= -ESOCKTNOSUPPORT
;
290 list_for_each_entry_rcu(answer
, &inetsw
[sock
->type
], list
) {
293 /* Check the non-wild match. */
294 if (protocol
== answer
->protocol
) {
295 if (protocol
!= IPPROTO_IP
)
298 /* Check for the two wild cases. */
299 if (IPPROTO_IP
== protocol
) {
300 protocol
= answer
->protocol
;
303 if (IPPROTO_IP
== answer
->protocol
)
306 err
= -EPROTONOSUPPORT
;
310 if (try_loading_module
< 2) {
313 * Be more specific, e.g. net-pf-2-proto-132-type-1
314 * (net-pf-PF_INET-proto-IPPROTO_SCTP-type-SOCK_STREAM)
316 if (++try_loading_module
== 1)
317 request_module("net-pf-%d-proto-%d-type-%d",
318 PF_INET
, protocol
, sock
->type
);
320 * Fall back to generic, e.g. net-pf-2-proto-132
321 * (net-pf-PF_INET-proto-IPPROTO_SCTP)
324 request_module("net-pf-%d-proto-%d",
326 goto lookup_protocol
;
332 if (sock
->type
== SOCK_RAW
&& !kern
&& !capable(CAP_NET_RAW
))
336 if (!inet_netns_ok(net
, protocol
))
339 sock
->ops
= answer
->ops
;
340 answer_prot
= answer
->prot
;
341 answer_no_check
= answer
->no_check
;
342 answer_flags
= answer
->flags
;
345 WARN_ON(answer_prot
->slab
== NULL
);
348 sk
= sk_alloc(net
, PF_INET
, GFP_KERNEL
, answer_prot
);
353 sk
->sk_no_check
= answer_no_check
;
354 if (INET_PROTOSW_REUSE
& answer_flags
)
358 inet
->is_icsk
= (INET_PROTOSW_ICSK
& answer_flags
) != 0;
362 if (SOCK_RAW
== sock
->type
) {
363 inet
->inet_num
= protocol
;
364 if (IPPROTO_RAW
== protocol
)
368 if (ipv4_config
.no_pmtu_disc
)
369 inet
->pmtudisc
= IP_PMTUDISC_DONT
;
371 inet
->pmtudisc
= IP_PMTUDISC_WANT
;
375 sock_init_data(sock
, sk
);
377 sk
->sk_destruct
= inet_sock_destruct
;
378 sk
->sk_protocol
= protocol
;
379 sk
->sk_backlog_rcv
= sk
->sk_prot
->backlog_rcv
;
386 inet
->mc_list
= NULL
;
388 sk_refcnt_debug_inc(sk
);
390 if (inet
->inet_num
) {
391 /* It assumes that any protocol which allows
392 * the user to assign a number at socket
393 * creation time automatically
396 inet
->inet_sport
= htons(inet
->inet_num
);
397 /* Add to protocol hash chains. */
398 sk
->sk_prot
->hash(sk
);
401 if (sk
->sk_prot
->init
) {
402 err
= sk
->sk_prot
->init(sk
);
404 sk_common_release(sk
);
415 * The peer socket should always be NULL (or else). When we call this
416 * function we are destroying the object and from then on nobody
417 * should refer to it.
419 int inet_release(struct socket
*sock
)
421 struct sock
*sk
= sock
->sk
;
426 sock_rps_reset_flow(sk
);
428 /* Applications forget to leave groups before exiting */
429 ip_mc_drop_socket(sk
);
431 /* If linger is set, we don't return until the close
432 * is complete. Otherwise we return immediately. The
433 * actually closing is done the same either way.
435 * If the close is due to the process exiting, we never
439 if (sock_flag(sk
, SOCK_LINGER
) &&
440 !(current
->flags
& PF_EXITING
))
441 timeout
= sk
->sk_lingertime
;
443 sk
->sk_prot
->close(sk
, timeout
);
447 EXPORT_SYMBOL(inet_release
);
449 /* It is off by default, see below. */
450 int sysctl_ip_nonlocal_bind __read_mostly
;
451 EXPORT_SYMBOL(sysctl_ip_nonlocal_bind
);
453 int inet_bind(struct socket
*sock
, struct sockaddr
*uaddr
, int addr_len
)
455 struct sockaddr_in
*addr
= (struct sockaddr_in
*)uaddr
;
456 struct sock
*sk
= sock
->sk
;
457 struct inet_sock
*inet
= inet_sk(sk
);
462 /* If the socket has its own bind function then use it. (RAW) */
463 if (sk
->sk_prot
->bind
) {
464 err
= sk
->sk_prot
->bind(sk
, uaddr
, addr_len
);
468 if (addr_len
< sizeof(struct sockaddr_in
))
471 chk_addr_ret
= inet_addr_type(sock_net(sk
), addr
->sin_addr
.s_addr
);
473 /* Not specified by any standard per-se, however it breaks too
474 * many applications when removed. It is unfortunate since
475 * allowing applications to make a non-local bind solves
476 * several problems with systems using dynamic addressing.
477 * (ie. your servers still start up even if your ISDN link
478 * is temporarily down)
480 err
= -EADDRNOTAVAIL
;
481 if (!sysctl_ip_nonlocal_bind
&&
482 !(inet
->freebind
|| inet
->transparent
) &&
483 addr
->sin_addr
.s_addr
!= htonl(INADDR_ANY
) &&
484 chk_addr_ret
!= RTN_LOCAL
&&
485 chk_addr_ret
!= RTN_MULTICAST
&&
486 chk_addr_ret
!= RTN_BROADCAST
)
489 snum
= ntohs(addr
->sin_port
);
491 if (snum
&& snum
< PROT_SOCK
&& !capable(CAP_NET_BIND_SERVICE
))
494 /* We keep a pair of addresses. rcv_saddr is the one
495 * used by hash lookups, and saddr is used for transmit.
497 * In the BSD API these are the same except where it
498 * would be illegal to use them (multicast/broadcast) in
499 * which case the sending device address is used.
503 /* Check these errors (active socket, double bind). */
505 if (sk
->sk_state
!= TCP_CLOSE
|| inet
->inet_num
)
506 goto out_release_sock
;
508 inet
->inet_rcv_saddr
= inet
->inet_saddr
= addr
->sin_addr
.s_addr
;
509 if (chk_addr_ret
== RTN_MULTICAST
|| chk_addr_ret
== RTN_BROADCAST
)
510 inet
->inet_saddr
= 0; /* Use device */
512 /* Make sure we are allowed to bind here. */
513 if (sk
->sk_prot
->get_port(sk
, snum
)) {
514 inet
->inet_saddr
= inet
->inet_rcv_saddr
= 0;
516 goto out_release_sock
;
519 if (inet
->inet_rcv_saddr
)
520 sk
->sk_userlocks
|= SOCK_BINDADDR_LOCK
;
522 sk
->sk_userlocks
|= SOCK_BINDPORT_LOCK
;
523 inet
->inet_sport
= htons(inet
->inet_num
);
524 inet
->inet_daddr
= 0;
525 inet
->inet_dport
= 0;
533 EXPORT_SYMBOL(inet_bind
);
535 int inet_dgram_connect(struct socket
*sock
, struct sockaddr
* uaddr
,
536 int addr_len
, int flags
)
538 struct sock
*sk
= sock
->sk
;
540 if (addr_len
< sizeof(uaddr
->sa_family
))
542 if (uaddr
->sa_family
== AF_UNSPEC
)
543 return sk
->sk_prot
->disconnect(sk
, flags
);
545 if (!inet_sk(sk
)->inet_num
&& inet_autobind(sk
))
547 return sk
->sk_prot
->connect(sk
, (struct sockaddr
*)uaddr
, addr_len
);
549 EXPORT_SYMBOL(inet_dgram_connect
);
551 static long inet_wait_for_connect(struct sock
*sk
, long timeo
)
555 prepare_to_wait(sk_sleep(sk
), &wait
, TASK_INTERRUPTIBLE
);
557 /* Basic assumption: if someone sets sk->sk_err, he _must_
558 * change state of the socket from TCP_SYN_*.
559 * Connect() does not allow to get error notifications
560 * without closing the socket.
562 while ((1 << sk
->sk_state
) & (TCPF_SYN_SENT
| TCPF_SYN_RECV
)) {
564 timeo
= schedule_timeout(timeo
);
566 if (signal_pending(current
) || !timeo
)
568 prepare_to_wait(sk_sleep(sk
), &wait
, TASK_INTERRUPTIBLE
);
570 finish_wait(sk_sleep(sk
), &wait
);
575 * Connect to a remote host. There is regrettably still a little
576 * TCP 'magic' in here.
578 int inet_stream_connect(struct socket
*sock
, struct sockaddr
*uaddr
,
579 int addr_len
, int flags
)
581 struct sock
*sk
= sock
->sk
;
585 if (addr_len
< sizeof(uaddr
->sa_family
))
590 if (uaddr
->sa_family
== AF_UNSPEC
) {
591 err
= sk
->sk_prot
->disconnect(sk
, flags
);
592 sock
->state
= err
? SS_DISCONNECTING
: SS_UNCONNECTED
;
596 switch (sock
->state
) {
605 /* Fall out of switch with err, set for this state */
609 if (sk
->sk_state
!= TCP_CLOSE
)
612 err
= sk
->sk_prot
->connect(sk
, uaddr
, addr_len
);
616 sock
->state
= SS_CONNECTING
;
618 /* Just entered SS_CONNECTING state; the only
619 * difference is that return value in non-blocking
620 * case is EINPROGRESS, rather than EALREADY.
626 timeo
= sock_sndtimeo(sk
, flags
& O_NONBLOCK
);
628 if ((1 << sk
->sk_state
) & (TCPF_SYN_SENT
| TCPF_SYN_RECV
)) {
629 /* Error code is set above */
630 if (!timeo
|| !inet_wait_for_connect(sk
, timeo
))
633 err
= sock_intr_errno(timeo
);
634 if (signal_pending(current
))
638 /* Connection was closed by RST, timeout, ICMP error
639 * or another process disconnected us.
641 if (sk
->sk_state
== TCP_CLOSE
)
644 /* sk->sk_err may be not zero now, if RECVERR was ordered by user
645 * and error was received after socket entered established state.
646 * Hence, it is handled normally after connect() return successfully.
649 sock
->state
= SS_CONNECTED
;
656 err
= sock_error(sk
) ? : -ECONNABORTED
;
657 sock
->state
= SS_UNCONNECTED
;
658 if (sk
->sk_prot
->disconnect(sk
, flags
))
659 sock
->state
= SS_DISCONNECTING
;
662 EXPORT_SYMBOL(inet_stream_connect
);
665 * Accept a pending connection. The TCP layer now gives BSD semantics.
668 int inet_accept(struct socket
*sock
, struct socket
*newsock
, int flags
)
670 struct sock
*sk1
= sock
->sk
;
672 struct sock
*sk2
= sk1
->sk_prot
->accept(sk1
, flags
, &err
);
679 WARN_ON(!((1 << sk2
->sk_state
) &
680 (TCPF_ESTABLISHED
| TCPF_CLOSE_WAIT
| TCPF_CLOSE
)));
682 sock_graft(sk2
, newsock
);
684 newsock
->state
= SS_CONNECTED
;
690 EXPORT_SYMBOL(inet_accept
);
694 * This does both peername and sockname.
696 int inet_getname(struct socket
*sock
, struct sockaddr
*uaddr
,
697 int *uaddr_len
, int peer
)
699 struct sock
*sk
= sock
->sk
;
700 struct inet_sock
*inet
= inet_sk(sk
);
701 DECLARE_SOCKADDR(struct sockaddr_in
*, sin
, uaddr
);
703 sin
->sin_family
= AF_INET
;
705 if (!inet
->inet_dport
||
706 (((1 << sk
->sk_state
) & (TCPF_CLOSE
| TCPF_SYN_SENT
)) &&
709 sin
->sin_port
= inet
->inet_dport
;
710 sin
->sin_addr
.s_addr
= inet
->inet_daddr
;
712 __be32 addr
= inet
->inet_rcv_saddr
;
714 addr
= inet
->inet_saddr
;
715 sin
->sin_port
= inet
->inet_sport
;
716 sin
->sin_addr
.s_addr
= addr
;
718 memset(sin
->sin_zero
, 0, sizeof(sin
->sin_zero
));
719 *uaddr_len
= sizeof(*sin
);
722 EXPORT_SYMBOL(inet_getname
);
724 int inet_sendmsg(struct kiocb
*iocb
, struct socket
*sock
, struct msghdr
*msg
,
727 struct sock
*sk
= sock
->sk
;
729 sock_rps_record_flow(sk
);
731 /* We may need to bind the socket. */
732 if (!inet_sk(sk
)->inet_num
&& !sk
->sk_prot
->no_autobind
&&
736 return sk
->sk_prot
->sendmsg(iocb
, sk
, msg
, size
);
738 EXPORT_SYMBOL(inet_sendmsg
);
740 ssize_t
inet_sendpage(struct socket
*sock
, struct page
*page
, int offset
,
741 size_t size
, int flags
)
743 struct sock
*sk
= sock
->sk
;
745 sock_rps_record_flow(sk
);
747 /* We may need to bind the socket. */
748 if (!inet_sk(sk
)->inet_num
&& !sk
->sk_prot
->no_autobind
&&
752 if (sk
->sk_prot
->sendpage
)
753 return sk
->sk_prot
->sendpage(sk
, page
, offset
, size
, flags
);
754 return sock_no_sendpage(sock
, page
, offset
, size
, flags
);
756 EXPORT_SYMBOL(inet_sendpage
);
758 int inet_recvmsg(struct kiocb
*iocb
, struct socket
*sock
, struct msghdr
*msg
,
759 size_t size
, int flags
)
761 struct sock
*sk
= sock
->sk
;
765 sock_rps_record_flow(sk
);
767 err
= sk
->sk_prot
->recvmsg(iocb
, sk
, msg
, size
, flags
& MSG_DONTWAIT
,
768 flags
& ~MSG_DONTWAIT
, &addr_len
);
770 msg
->msg_namelen
= addr_len
;
773 EXPORT_SYMBOL(inet_recvmsg
);
775 int inet_shutdown(struct socket
*sock
, int how
)
777 struct sock
*sk
= sock
->sk
;
780 /* This should really check to make sure
781 * the socket is a TCP socket. (WHY AC...)
783 how
++; /* maps 0->1 has the advantage of making bit 1 rcvs and
786 if ((how
& ~SHUTDOWN_MASK
) || !how
) /* MAXINT->0 */
790 if (sock
->state
== SS_CONNECTING
) {
791 if ((1 << sk
->sk_state
) &
792 (TCPF_SYN_SENT
| TCPF_SYN_RECV
| TCPF_CLOSE
))
793 sock
->state
= SS_DISCONNECTING
;
795 sock
->state
= SS_CONNECTED
;
798 switch (sk
->sk_state
) {
801 /* Hack to wake up other listeners, who can poll for
802 POLLHUP, even on eg. unconnected UDP sockets -- RR */
804 sk
->sk_shutdown
|= how
;
805 if (sk
->sk_prot
->shutdown
)
806 sk
->sk_prot
->shutdown(sk
, how
);
809 /* Remaining two branches are temporary solution for missing
810 * close() in multithreaded environment. It is _not_ a good idea,
811 * but we have no choice until close() is repaired at VFS level.
814 if (!(how
& RCV_SHUTDOWN
))
818 err
= sk
->sk_prot
->disconnect(sk
, O_NONBLOCK
);
819 sock
->state
= err
? SS_DISCONNECTING
: SS_UNCONNECTED
;
823 /* Wake up anyone sleeping in poll. */
824 sk
->sk_state_change(sk
);
828 EXPORT_SYMBOL(inet_shutdown
);
831 * ioctl() calls you can issue on an INET socket. Most of these are
832 * device configuration and stuff and very rarely used. Some ioctls
833 * pass on to the socket itself.
835 * NOTE: I like the idea of a module for the config stuff. ie ifconfig
836 * loads the devconfigure module does its configuring and unloads it.
837 * There's a good 20K of config code hanging around the kernel.
840 int inet_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
842 struct sock
*sk
= sock
->sk
;
844 struct net
*net
= sock_net(sk
);
848 err
= sock_get_timestamp(sk
, (struct timeval __user
*)arg
);
851 err
= sock_get_timestampns(sk
, (struct timespec __user
*)arg
);
856 err
= ip_rt_ioctl(net
, cmd
, (void __user
*)arg
);
861 err
= arp_ioctl(net
, cmd
, (void __user
*)arg
);
874 err
= devinet_ioctl(net
, cmd
, (void __user
*)arg
);
877 if (sk
->sk_prot
->ioctl
)
878 err
= sk
->sk_prot
->ioctl(sk
, cmd
, arg
);
885 EXPORT_SYMBOL(inet_ioctl
);
887 const struct proto_ops inet_stream_ops
= {
889 .owner
= THIS_MODULE
,
890 .release
= inet_release
,
892 .connect
= inet_stream_connect
,
893 .socketpair
= sock_no_socketpair
,
894 .accept
= inet_accept
,
895 .getname
= inet_getname
,
898 .listen
= inet_listen
,
899 .shutdown
= inet_shutdown
,
900 .setsockopt
= sock_common_setsockopt
,
901 .getsockopt
= sock_common_getsockopt
,
902 .sendmsg
= inet_sendmsg
,
903 .recvmsg
= inet_recvmsg
,
904 .mmap
= sock_no_mmap
,
905 .sendpage
= inet_sendpage
,
906 .splice_read
= tcp_splice_read
,
908 .compat_setsockopt
= compat_sock_common_setsockopt
,
909 .compat_getsockopt
= compat_sock_common_getsockopt
,
912 EXPORT_SYMBOL(inet_stream_ops
);
914 const struct proto_ops inet_dgram_ops
= {
916 .owner
= THIS_MODULE
,
917 .release
= inet_release
,
919 .connect
= inet_dgram_connect
,
920 .socketpair
= sock_no_socketpair
,
921 .accept
= sock_no_accept
,
922 .getname
= inet_getname
,
925 .listen
= sock_no_listen
,
926 .shutdown
= inet_shutdown
,
927 .setsockopt
= sock_common_setsockopt
,
928 .getsockopt
= sock_common_getsockopt
,
929 .sendmsg
= inet_sendmsg
,
930 .recvmsg
= inet_recvmsg
,
931 .mmap
= sock_no_mmap
,
932 .sendpage
= inet_sendpage
,
934 .compat_setsockopt
= compat_sock_common_setsockopt
,
935 .compat_getsockopt
= compat_sock_common_getsockopt
,
938 EXPORT_SYMBOL(inet_dgram_ops
);
941 * For SOCK_RAW sockets; should be the same as inet_dgram_ops but without
944 static const struct proto_ops inet_sockraw_ops
= {
946 .owner
= THIS_MODULE
,
947 .release
= inet_release
,
949 .connect
= inet_dgram_connect
,
950 .socketpair
= sock_no_socketpair
,
951 .accept
= sock_no_accept
,
952 .getname
= inet_getname
,
953 .poll
= datagram_poll
,
955 .listen
= sock_no_listen
,
956 .shutdown
= inet_shutdown
,
957 .setsockopt
= sock_common_setsockopt
,
958 .getsockopt
= sock_common_getsockopt
,
959 .sendmsg
= inet_sendmsg
,
960 .recvmsg
= inet_recvmsg
,
961 .mmap
= sock_no_mmap
,
962 .sendpage
= inet_sendpage
,
964 .compat_setsockopt
= compat_sock_common_setsockopt
,
965 .compat_getsockopt
= compat_sock_common_getsockopt
,
969 static const struct net_proto_family inet_family_ops
= {
971 .create
= inet_create
,
972 .owner
= THIS_MODULE
,
975 /* Upon startup we insert all the elements in inetsw_array[] into
976 * the linked list inetsw.
978 static struct inet_protosw inetsw_array
[] =
982 .protocol
= IPPROTO_TCP
,
984 .ops
= &inet_stream_ops
,
986 .flags
= INET_PROTOSW_PERMANENT
|
992 .protocol
= IPPROTO_UDP
,
994 .ops
= &inet_dgram_ops
,
995 .no_check
= UDP_CSUM_DEFAULT
,
996 .flags
= INET_PROTOSW_PERMANENT
,
1002 .protocol
= IPPROTO_IP
, /* wild card */
1004 .ops
= &inet_sockraw_ops
,
1005 .no_check
= UDP_CSUM_DEFAULT
,
1006 .flags
= INET_PROTOSW_REUSE
,
1010 #define INETSW_ARRAY_LEN ARRAY_SIZE(inetsw_array)
1012 void inet_register_protosw(struct inet_protosw
*p
)
1014 struct list_head
*lh
;
1015 struct inet_protosw
*answer
;
1016 int protocol
= p
->protocol
;
1017 struct list_head
*last_perm
;
1019 spin_lock_bh(&inetsw_lock
);
1021 if (p
->type
>= SOCK_MAX
)
1024 /* If we are trying to override a permanent protocol, bail. */
1026 last_perm
= &inetsw
[p
->type
];
1027 list_for_each(lh
, &inetsw
[p
->type
]) {
1028 answer
= list_entry(lh
, struct inet_protosw
, list
);
1030 /* Check only the non-wild match. */
1031 if (INET_PROTOSW_PERMANENT
& answer
->flags
) {
1032 if (protocol
== answer
->protocol
)
1042 /* Add the new entry after the last permanent entry if any, so that
1043 * the new entry does not override a permanent entry when matched with
1044 * a wild-card protocol. But it is allowed to override any existing
1045 * non-permanent entry. This means that when we remove this entry, the
1046 * system automatically returns to the old behavior.
1048 list_add_rcu(&p
->list
, last_perm
);
1050 spin_unlock_bh(&inetsw_lock
);
1055 printk(KERN_ERR
"Attempt to override permanent protocol %d.\n",
1061 "Ignoring attempt to register invalid socket type %d.\n",
1065 EXPORT_SYMBOL(inet_register_protosw
);
1067 void inet_unregister_protosw(struct inet_protosw
*p
)
1069 if (INET_PROTOSW_PERMANENT
& p
->flags
) {
1071 "Attempt to unregister permanent protocol %d.\n",
1074 spin_lock_bh(&inetsw_lock
);
1075 list_del_rcu(&p
->list
);
1076 spin_unlock_bh(&inetsw_lock
);
1081 EXPORT_SYMBOL(inet_unregister_protosw
);
1084 * Shall we try to damage output packets if routing dev changes?
1087 int sysctl_ip_dynaddr __read_mostly
;
1089 static int inet_sk_reselect_saddr(struct sock
*sk
)
1091 struct inet_sock
*inet
= inet_sk(sk
);
1094 __be32 old_saddr
= inet
->inet_saddr
;
1096 __be32 daddr
= inet
->inet_daddr
;
1098 if (inet
->opt
&& inet
->opt
->srr
)
1099 daddr
= inet
->opt
->faddr
;
1101 /* Query new route. */
1102 err
= ip_route_connect(&rt
, daddr
, 0,
1104 sk
->sk_bound_dev_if
,
1106 inet
->inet_sport
, inet
->inet_dport
, sk
, 0);
1110 sk_setup_caps(sk
, &rt
->dst
);
1112 new_saddr
= rt
->rt_src
;
1114 if (new_saddr
== old_saddr
)
1117 if (sysctl_ip_dynaddr
> 1) {
1118 printk(KERN_INFO
"%s(): shifting inet->saddr from %pI4 to %pI4\n",
1119 __func__
, &old_saddr
, &new_saddr
);
1122 inet
->inet_saddr
= inet
->inet_rcv_saddr
= new_saddr
;
1124 __sk_prot_rehash(sk
);
1128 int inet_sk_rebuild_header(struct sock
*sk
)
1130 struct inet_sock
*inet
= inet_sk(sk
);
1131 struct rtable
*rt
= (struct rtable
*)__sk_dst_check(sk
, 0);
1135 /* Route is OK, nothing to do. */
1140 daddr
= inet
->inet_daddr
;
1141 if (inet
->opt
&& inet
->opt
->srr
)
1142 daddr
= inet
->opt
->faddr
;
1145 .oif
= sk
->sk_bound_dev_if
,
1146 .mark
= sk
->sk_mark
,
1150 .saddr
= inet
->inet_saddr
,
1151 .tos
= RT_CONN_FLAGS(sk
),
1154 .proto
= sk
->sk_protocol
,
1155 .flags
= inet_sk_flowi_flags(sk
),
1158 .sport
= inet
->inet_sport
,
1159 .dport
= inet
->inet_dport
,
1164 security_sk_classify_flow(sk
, &fl
);
1165 err
= ip_route_output_flow(sock_net(sk
), &rt
, &fl
, sk
, 0);
1168 sk_setup_caps(sk
, &rt
->dst
);
1170 /* Routing failed... */
1171 sk
->sk_route_caps
= 0;
1173 * Other protocols have to map its equivalent state to TCP_SYN_SENT.
1174 * DCCP maps its DCCP_REQUESTING state to TCP_SYN_SENT. -acme
1176 if (!sysctl_ip_dynaddr
||
1177 sk
->sk_state
!= TCP_SYN_SENT
||
1178 (sk
->sk_userlocks
& SOCK_BINDADDR_LOCK
) ||
1179 (err
= inet_sk_reselect_saddr(sk
)) != 0)
1180 sk
->sk_err_soft
= -err
;
1185 EXPORT_SYMBOL(inet_sk_rebuild_header
);
1187 static int inet_gso_send_check(struct sk_buff
*skb
)
1190 const struct net_protocol
*ops
;
1195 if (unlikely(!pskb_may_pull(skb
, sizeof(*iph
))))
1200 if (ihl
< sizeof(*iph
))
1203 if (unlikely(!pskb_may_pull(skb
, ihl
)))
1206 __skb_pull(skb
, ihl
);
1207 skb_reset_transport_header(skb
);
1209 proto
= iph
->protocol
& (MAX_INET_PROTOS
- 1);
1210 err
= -EPROTONOSUPPORT
;
1213 ops
= rcu_dereference(inet_protos
[proto
]);
1214 if (likely(ops
&& ops
->gso_send_check
))
1215 err
= ops
->gso_send_check(skb
);
1222 static struct sk_buff
* BCMFASTPATH_HOST
inet_gso_segment(struct sk_buff
*skb
, int features
)
1224 struct sk_buff
*segs
= ERR_PTR(-EINVAL
);
1226 const struct net_protocol
*ops
;
1230 unsigned int offset
= 0;
1232 if (!(features
& NETIF_F_V4_CSUM
))
1233 features
&= ~NETIF_F_SG
;
1235 if (unlikely(skb_shinfo(skb
)->gso_type
&
1243 if (unlikely(!pskb_may_pull(skb
, sizeof(*iph
))))
1248 if (ihl
< sizeof(*iph
))
1251 if (unlikely(!pskb_may_pull(skb
, ihl
)))
1254 __skb_pull(skb
, ihl
);
1255 skb_reset_transport_header(skb
);
1257 id
= ntohs(iph
->id
);
1258 proto
= iph
->protocol
& (MAX_INET_PROTOS
- 1);
1259 segs
= ERR_PTR(-EPROTONOSUPPORT
);
1262 ops
= rcu_dereference(inet_protos
[proto
]);
1263 if (likely(ops
&& ops
->gso_segment
))
1264 segs
= ops
->gso_segment(skb
, features
);
1267 if (!segs
|| IS_ERR(segs
))
1273 if (proto
== IPPROTO_UDP
) {
1274 iph
->id
= htons(id
);
1275 iph
->frag_off
= htons(offset
>> 3);
1276 if (skb
->next
!= NULL
)
1277 iph
->frag_off
|= htons(IP_MF
);
1278 offset
+= (skb
->len
- skb
->mac_len
- iph
->ihl
* 4);
1280 iph
->id
= htons(id
++);
1281 iph
->tot_len
= htons(skb
->len
- skb
->mac_len
);
1283 iph
->check
= ip_fast_csum(skb_network_header(skb
), iph
->ihl
);
1284 } while ((skb
= skb
->next
));
1290 static struct sk_buff
** BCMFASTPATH_HOST
inet_gro_receive(struct sk_buff
**head
,
1291 struct sk_buff
*skb
)
1293 const struct net_protocol
*ops
;
1294 struct sk_buff
**pp
= NULL
;
1303 off
= skb_gro_offset(skb
);
1304 hlen
= off
+ sizeof(*iph
);
1305 iph
= skb_gro_header_fast(skb
, off
);
1306 if (skb_gro_header_hard(skb
, hlen
)) {
1307 iph
= skb_gro_header_slow(skb
, hlen
, off
);
1312 proto
= iph
->protocol
& (MAX_INET_PROTOS
- 1);
1315 ops
= rcu_dereference(inet_protos
[proto
]);
1316 if (!ops
|| !ops
->gro_receive
)
1319 if (*(u8
*)iph
!= 0x45)
1322 if (unlikely(ip_fast_csum((u8
*)iph
, iph
->ihl
)))
1325 id
= ntohl(*(__be32
*)&iph
->id
);
1326 flush
= (u16
)((ntohl(*(__be32
*)iph
) ^ skb_gro_len(skb
)) | (id
^ IP_DF
));
1329 for (p
= *head
; p
; p
= p
->next
) {
1332 if (!NAPI_GRO_CB(p
)->same_flow
)
1337 if ((iph
->protocol
^ iph2
->protocol
) |
1338 (iph
->tos
^ iph2
->tos
) |
1339 ((__force u32
)iph
->saddr
^ (__force u32
)iph2
->saddr
) |
1340 ((__force u32
)iph
->daddr
^ (__force u32
)iph2
->daddr
)) {
1341 NAPI_GRO_CB(p
)->same_flow
= 0;
1345 /* All fields must match except length and checksum. */
1346 NAPI_GRO_CB(p
)->flush
|=
1347 (iph
->ttl
^ iph2
->ttl
) |
1348 ((u16
)(ntohs(iph2
->id
) + NAPI_GRO_CB(p
)->count
) ^ id
);
1350 NAPI_GRO_CB(p
)->flush
|= flush
;
1353 NAPI_GRO_CB(skb
)->flush
|= flush
;
1354 skb_gro_pull(skb
, sizeof(*iph
));
1355 skb_set_transport_header(skb
, skb_gro_offset(skb
));
1357 pp
= ops
->gro_receive(head
, skb
);
1363 NAPI_GRO_CB(skb
)->flush
|= flush
;
1368 static int BCMFASTPATH_HOST
inet_gro_complete(struct sk_buff
*skb
)
1370 const struct net_protocol
*ops
;
1371 struct iphdr
*iph
= ip_hdr(skb
);
1372 int proto
= iph
->protocol
& (MAX_INET_PROTOS
- 1);
1374 __be16 newlen
= htons(skb
->len
- skb_network_offset(skb
));
1376 csum_replace2(&iph
->check
, iph
->tot_len
, newlen
);
1377 iph
->tot_len
= newlen
;
1380 ops
= rcu_dereference(inet_protos
[proto
]);
1381 if (WARN_ON(!ops
|| !ops
->gro_complete
))
1384 err
= ops
->gro_complete(skb
);
1392 int inet_ctl_sock_create(struct sock
**sk
, unsigned short family
,
1393 unsigned short type
, unsigned char protocol
,
1396 struct socket
*sock
;
1397 int rc
= sock_create_kern(family
, type
, protocol
, &sock
);
1401 (*sk
)->sk_allocation
= GFP_ATOMIC
;
1403 * Unhash it so that IP input processing does not even see it,
1404 * we do not wish this socket to see incoming packets.
1406 (*sk
)->sk_prot
->unhash(*sk
);
1408 sk_change_net(*sk
, net
);
1412 EXPORT_SYMBOL_GPL(inet_ctl_sock_create
);
1414 unsigned long snmp_fold_field(void __percpu
*mib
[], int offt
)
1416 unsigned long res
= 0;
1419 for_each_possible_cpu(i
) {
1420 res
+= *(((unsigned long *) per_cpu_ptr(mib
[0], i
)) + offt
);
1421 res
+= *(((unsigned long *) per_cpu_ptr(mib
[1], i
)) + offt
);
1425 EXPORT_SYMBOL_GPL(snmp_fold_field
);
1427 #if BITS_PER_LONG==32
1429 u64
snmp_fold_field64(void __percpu
*mib
[], int offt
, size_t syncp_offset
)
1434 for_each_possible_cpu(cpu
) {
1435 void *bhptr
, *userptr
;
1436 struct u64_stats_sync
*syncp
;
1440 /* first mib used by softirq context, we must use _bh() accessors */
1441 bhptr
= per_cpu_ptr(SNMP_STAT_BHPTR(mib
), cpu
);
1442 syncp
= (struct u64_stats_sync
*)(bhptr
+ syncp_offset
);
1444 start
= u64_stats_fetch_begin_bh(syncp
);
1445 v_bh
= *(((u64
*) bhptr
) + offt
);
1446 } while (u64_stats_fetch_retry_bh(syncp
, start
));
1448 /* second mib used in USER context */
1449 userptr
= per_cpu_ptr(SNMP_STAT_USRPTR(mib
), cpu
);
1450 syncp
= (struct u64_stats_sync
*)(userptr
+ syncp_offset
);
1452 start
= u64_stats_fetch_begin(syncp
);
1453 v_user
= *(((u64
*) userptr
) + offt
);
1454 } while (u64_stats_fetch_retry(syncp
, start
));
1456 res
+= v_bh
+ v_user
;
1460 EXPORT_SYMBOL_GPL(snmp_fold_field64
);
1463 int snmp_mib_init(void __percpu
*ptr
[2], size_t mibsize
, size_t align
)
1465 BUG_ON(ptr
== NULL
);
1466 ptr
[0] = __alloc_percpu(mibsize
, align
);
1469 ptr
[1] = __alloc_percpu(mibsize
, align
);
1474 free_percpu(ptr
[0]);
1479 EXPORT_SYMBOL_GPL(snmp_mib_init
);
1481 void snmp_mib_free(void __percpu
*ptr
[2])
1483 BUG_ON(ptr
== NULL
);
1484 free_percpu(ptr
[0]);
1485 free_percpu(ptr
[1]);
1486 ptr
[0] = ptr
[1] = NULL
;
1488 EXPORT_SYMBOL_GPL(snmp_mib_free
);
1490 #ifdef CONFIG_IP_MULTICAST
1491 static const struct net_protocol igmp_protocol
= {
1492 .handler
= igmp_rcv
,
1497 static const struct net_protocol tcp_protocol
= {
1498 .handler
= tcp_v4_rcv
,
1499 .err_handler
= tcp_v4_err
,
1500 .gso_send_check
= tcp_v4_gso_send_check
,
1501 .gso_segment
= tcp_tso_segment
,
1502 .gro_receive
= tcp4_gro_receive
,
1503 .gro_complete
= tcp4_gro_complete
,
1508 static const struct net_protocol udp_protocol
= {
1510 .err_handler
= udp_err
,
1511 .gso_send_check
= udp4_ufo_send_check
,
1512 .gso_segment
= udp4_ufo_fragment
,
1517 static const struct net_protocol icmp_protocol
= {
1518 .handler
= icmp_rcv
,
1523 static __net_init
int ipv4_mib_init_net(struct net
*net
)
1525 if (snmp_mib_init((void __percpu
**)net
->mib
.tcp_statistics
,
1526 sizeof(struct tcp_mib
),
1527 __alignof__(struct tcp_mib
)) < 0)
1529 if (snmp_mib_init((void __percpu
**)net
->mib
.ip_statistics
,
1530 sizeof(struct ipstats_mib
),
1531 __alignof__(struct ipstats_mib
)) < 0)
1533 if (snmp_mib_init((void __percpu
**)net
->mib
.net_statistics
,
1534 sizeof(struct linux_mib
),
1535 __alignof__(struct linux_mib
)) < 0)
1537 if (snmp_mib_init((void __percpu
**)net
->mib
.udp_statistics
,
1538 sizeof(struct udp_mib
),
1539 __alignof__(struct udp_mib
)) < 0)
1541 if (snmp_mib_init((void __percpu
**)net
->mib
.udplite_statistics
,
1542 sizeof(struct udp_mib
),
1543 __alignof__(struct udp_mib
)) < 0)
1544 goto err_udplite_mib
;
1545 if (snmp_mib_init((void __percpu
**)net
->mib
.icmp_statistics
,
1546 sizeof(struct icmp_mib
),
1547 __alignof__(struct icmp_mib
)) < 0)
1549 if (snmp_mib_init((void __percpu
**)net
->mib
.icmpmsg_statistics
,
1550 sizeof(struct icmpmsg_mib
),
1551 __alignof__(struct icmpmsg_mib
)) < 0)
1552 goto err_icmpmsg_mib
;
1558 snmp_mib_free((void __percpu
**)net
->mib
.icmp_statistics
);
1560 snmp_mib_free((void __percpu
**)net
->mib
.udplite_statistics
);
1562 snmp_mib_free((void __percpu
**)net
->mib
.udp_statistics
);
1564 snmp_mib_free((void __percpu
**)net
->mib
.net_statistics
);
1566 snmp_mib_free((void __percpu
**)net
->mib
.ip_statistics
);
1568 snmp_mib_free((void __percpu
**)net
->mib
.tcp_statistics
);
1573 static __net_exit
void ipv4_mib_exit_net(struct net
*net
)
1575 snmp_mib_free((void __percpu
**)net
->mib
.icmpmsg_statistics
);
1576 snmp_mib_free((void __percpu
**)net
->mib
.icmp_statistics
);
1577 snmp_mib_free((void __percpu
**)net
->mib
.udplite_statistics
);
1578 snmp_mib_free((void __percpu
**)net
->mib
.udp_statistics
);
1579 snmp_mib_free((void __percpu
**)net
->mib
.net_statistics
);
1580 snmp_mib_free((void __percpu
**)net
->mib
.ip_statistics
);
1581 snmp_mib_free((void __percpu
**)net
->mib
.tcp_statistics
);
1584 static __net_initdata
struct pernet_operations ipv4_mib_ops
= {
1585 .init
= ipv4_mib_init_net
,
1586 .exit
= ipv4_mib_exit_net
,
1589 static int __init
init_ipv4_mibs(void)
1591 return register_pernet_subsys(&ipv4_mib_ops
);
1594 static int ipv4_proc_init(void);
1597 * IP protocol layer initialiser
1600 static struct packet_type ip_packet_type __read_mostly
= {
1601 .type
= cpu_to_be16(ETH_P_IP
),
1603 .gso_send_check
= inet_gso_send_check
,
1604 .gso_segment
= inet_gso_segment
,
1605 .gro_receive
= inet_gro_receive
,
1606 .gro_complete
= inet_gro_complete
,
1609 static int __init
inet_init(void)
1611 struct sk_buff
*dummy_skb
;
1612 struct inet_protosw
*q
;
1613 struct list_head
*r
;
1616 BUILD_BUG_ON(sizeof(struct inet_skb_parm
) > sizeof(dummy_skb
->cb
));
1618 sysctl_local_reserved_ports
= kzalloc(65536 / 8, GFP_KERNEL
);
1619 if (!sysctl_local_reserved_ports
)
1622 rc
= proto_register(&tcp_prot
, 1);
1624 goto out_free_reserved_ports
;
1626 rc
= proto_register(&udp_prot
, 1);
1628 goto out_unregister_tcp_proto
;
1630 rc
= proto_register(&raw_prot
, 1);
1632 goto out_unregister_udp_proto
;
1635 * Tell SOCKET that we are alive...
1638 (void)sock_register(&inet_family_ops
);
1640 #ifdef CONFIG_SYSCTL
1641 ip_static_sysctl_init();
1645 * Add all the base protocols.
1648 if (inet_add_protocol(&icmp_protocol
, IPPROTO_ICMP
) < 0)
1649 printk(KERN_CRIT
"inet_init: Cannot add ICMP protocol\n");
1650 if (inet_add_protocol(&udp_protocol
, IPPROTO_UDP
) < 0)
1651 printk(KERN_CRIT
"inet_init: Cannot add UDP protocol\n");
1652 if (inet_add_protocol(&tcp_protocol
, IPPROTO_TCP
) < 0)
1653 printk(KERN_CRIT
"inet_init: Cannot add TCP protocol\n");
1654 #ifdef CONFIG_IP_MULTICAST
1655 if (inet_add_protocol(&igmp_protocol
, IPPROTO_IGMP
) < 0)
1656 printk(KERN_CRIT
"inet_init: Cannot add IGMP protocol\n");
1659 /* Register the socket-side information for inet_create. */
1660 for (r
= &inetsw
[0]; r
< &inetsw
[SOCK_MAX
]; ++r
)
1663 for (q
= inetsw_array
; q
< &inetsw_array
[INETSW_ARRAY_LEN
]; ++q
)
1664 inet_register_protosw(q
);
1667 * Set the ARP module up
1673 * Set the IP module up
1680 /* Setup TCP slab cache for open requests. */
1683 /* Setup UDP memory threshold */
1686 /* Add UDP-Lite (RFC 3828) */
1687 udplite4_register();
1690 * Set the ICMP layer up
1693 if (icmp_init() < 0)
1694 panic("Failed to create the ICMP control socket.\n");
1697 * Initialise the multicast router
1699 #if defined(CONFIG_IP_MROUTE)
1701 printk(KERN_CRIT
"inet_init: Cannot init ipv4 mroute\n");
1704 * Initialise per-cpu ipv4 mibs
1707 if (init_ipv4_mibs())
1708 printk(KERN_CRIT
"inet_init: Cannot init ipv4 mibs\n");
1714 dev_add_pack(&ip_packet_type
);
1719 out_unregister_udp_proto
:
1720 proto_unregister(&udp_prot
);
1721 out_unregister_tcp_proto
:
1722 proto_unregister(&tcp_prot
);
1723 out_free_reserved_ports
:
1724 kfree(sysctl_local_reserved_ports
);
1728 fs_initcall(inet_init
);
1730 /* ------------------------------------------------------------------------ */
1732 #ifdef CONFIG_PROC_FS
1733 static int __init
ipv4_proc_init(void)
1737 if (raw_proc_init())
1739 if (tcp4_proc_init())
1741 if (udp4_proc_init())
1743 if (ip_misc_proc_init())
1758 #else /* CONFIG_PROC_FS */
1759 static int __init
ipv4_proc_init(void)
1763 #endif /* CONFIG_PROC_FS */
1765 MODULE_ALIAS_NETPROTO(PF_INET
);