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 #define pr_fmt(fmt) "IPv4: " fmt
70 #include <linux/err.h>
71 #include <linux/errno.h>
72 #include <linux/types.h>
73 #include <linux/socket.h>
75 #include <linux/kernel.h>
76 #include <linux/module.h>
77 #include <linux/sched.h>
78 #include <linux/timer.h>
79 #include <linux/string.h>
80 #include <linux/sockios.h>
81 #include <linux/net.h>
82 #include <linux/capability.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>
90 #include <linux/random.h>
91 #include <linux/slab.h>
93 #include <asm/uaccess.h>
95 #include <linux/inet.h>
96 #include <linux/igmp.h>
97 #include <linux/inetdevice.h>
98 #include <linux/netdevice.h>
99 #include <net/checksum.h>
101 #include <net/protocol.h>
103 #include <net/route.h>
104 #include <net/ip_fib.h>
105 #include <net/inet_connection_sock.h>
108 #include <net/udplite.h>
109 #include <net/ping.h>
110 #include <linux/skbuff.h>
111 #include <net/sock.h>
113 #include <net/icmp.h>
114 #include <net/ipip.h>
115 #include <net/inet_common.h>
116 #include <net/xfrm.h>
117 #include <net/net_namespace.h>
118 #ifdef CONFIG_IP_MROUTE
119 #include <linux/mroute.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
);
158 kfree(rcu_dereference_protected(inet
->inet_opt
, 1));
159 dst_release(rcu_dereference_check(sk
->sk_dst_cache
, 1));
160 dst_release(sk
->sk_rx_dst
);
161 sk_refcnt_debug_dec(sk
);
163 EXPORT_SYMBOL(inet_sock_destruct
);
166 * The routines beyond this point handle the behaviour of an AF_INET
167 * socket object. Mostly it punts to the subprotocols of IP to do
172 * Automatically bind an unbound socket.
175 static int inet_autobind(struct sock
*sk
)
177 struct inet_sock
*inet
;
178 /* We may need to bind the socket. */
181 if (!inet
->inet_num
) {
182 if (sk
->sk_prot
->get_port(sk
, 0)) {
186 inet
->inet_sport
= htons(inet
->inet_num
);
193 * Move a socket into listening state.
195 int inet_listen(struct socket
*sock
, int backlog
)
197 struct sock
*sk
= sock
->sk
;
198 unsigned char old_state
;
204 if (sock
->state
!= SS_UNCONNECTED
|| sock
->type
!= SOCK_STREAM
)
207 old_state
= sk
->sk_state
;
208 if (!((1 << old_state
) & (TCPF_CLOSE
| TCPF_LISTEN
)))
211 /* Really, if the socket is already in listen state
212 * we can only allow the backlog to be adjusted.
214 if (old_state
!= TCP_LISTEN
) {
215 err
= inet_csk_listen_start(sk
, backlog
);
219 sk
->sk_max_ack_backlog
= backlog
;
226 EXPORT_SYMBOL(inet_listen
);
228 u32 inet_ehash_secret __read_mostly
;
229 EXPORT_SYMBOL(inet_ehash_secret
);
232 * inet_ehash_secret must be set exactly once
234 void build_ehash_secret(void)
239 get_random_bytes(&rnd
, sizeof(rnd
));
242 cmpxchg(&inet_ehash_secret
, 0, rnd
);
244 EXPORT_SYMBOL(build_ehash_secret
);
246 static inline int inet_netns_ok(struct net
*net
, __u8 protocol
)
248 const struct net_protocol
*ipprot
;
250 if (net_eq(net
, &init_net
))
253 ipprot
= rcu_dereference(inet_protos
[protocol
]);
254 if (ipprot
== NULL
) {
258 return ipprot
->netns_ok
;
262 * Create an inet socket.
265 static int inet_create(struct net
*net
, struct socket
*sock
, int protocol
,
269 struct inet_protosw
*answer
;
270 struct inet_sock
*inet
;
271 struct proto
*answer_prot
;
272 unsigned char answer_flags
;
273 char answer_no_check
;
274 int try_loading_module
= 0;
277 if (unlikely(!inet_ehash_secret
))
278 if (sock
->type
!= SOCK_RAW
&& sock
->type
!= SOCK_DGRAM
)
279 build_ehash_secret();
281 sock
->state
= SS_UNCONNECTED
;
283 /* Look for the requested type/protocol pair. */
285 err
= -ESOCKTNOSUPPORT
;
287 list_for_each_entry_rcu(answer
, &inetsw
[sock
->type
], list
) {
290 /* Check the non-wild match. */
291 if (protocol
== answer
->protocol
) {
292 if (protocol
!= IPPROTO_IP
)
295 /* Check for the two wild cases. */
296 if (IPPROTO_IP
== protocol
) {
297 protocol
= answer
->protocol
;
300 if (IPPROTO_IP
== answer
->protocol
)
303 err
= -EPROTONOSUPPORT
;
307 if (try_loading_module
< 2) {
310 * Be more specific, e.g. net-pf-2-proto-132-type-1
311 * (net-pf-PF_INET-proto-IPPROTO_SCTP-type-SOCK_STREAM)
313 if (++try_loading_module
== 1)
314 request_module("net-pf-%d-proto-%d-type-%d",
315 PF_INET
, protocol
, sock
->type
);
317 * Fall back to generic, e.g. net-pf-2-proto-132
318 * (net-pf-PF_INET-proto-IPPROTO_SCTP)
321 request_module("net-pf-%d-proto-%d",
323 goto lookup_protocol
;
329 if (sock
->type
== SOCK_RAW
&& !kern
&& !capable(CAP_NET_RAW
))
333 if (!inet_netns_ok(net
, protocol
))
336 sock
->ops
= answer
->ops
;
337 answer_prot
= answer
->prot
;
338 answer_no_check
= answer
->no_check
;
339 answer_flags
= answer
->flags
;
342 WARN_ON(answer_prot
->slab
== NULL
);
345 sk
= sk_alloc(net
, PF_INET
, GFP_KERNEL
, answer_prot
);
350 sk
->sk_no_check
= answer_no_check
;
351 if (INET_PROTOSW_REUSE
& answer_flags
)
352 sk
->sk_reuse
= SK_CAN_REUSE
;
355 inet
->is_icsk
= (INET_PROTOSW_ICSK
& answer_flags
) != 0;
359 if (SOCK_RAW
== sock
->type
) {
360 inet
->inet_num
= protocol
;
361 if (IPPROTO_RAW
== protocol
)
365 if (ipv4_config
.no_pmtu_disc
)
366 inet
->pmtudisc
= IP_PMTUDISC_DONT
;
368 inet
->pmtudisc
= IP_PMTUDISC_WANT
;
372 sock_init_data(sock
, sk
);
374 sk
->sk_destruct
= inet_sock_destruct
;
375 sk
->sk_protocol
= protocol
;
376 sk
->sk_backlog_rcv
= sk
->sk_prot
->backlog_rcv
;
383 inet
->mc_list
= NULL
;
386 sk_refcnt_debug_inc(sk
);
388 if (inet
->inet_num
) {
389 /* It assumes that any protocol which allows
390 * the user to assign a number at socket
391 * creation time automatically
394 inet
->inet_sport
= htons(inet
->inet_num
);
395 /* Add to protocol hash chains. */
396 sk
->sk_prot
->hash(sk
);
399 if (sk
->sk_prot
->init
) {
400 err
= sk
->sk_prot
->init(sk
);
402 sk_common_release(sk
);
413 * The peer socket should always be NULL (or else). When we call this
414 * function we are destroying the object and from then on nobody
415 * should refer to it.
417 int inet_release(struct socket
*sock
)
419 struct sock
*sk
= sock
->sk
;
424 sock_rps_reset_flow(sk
);
426 /* Applications forget to leave groups before exiting */
427 ip_mc_drop_socket(sk
);
429 /* If linger is set, we don't return until the close
430 * is complete. Otherwise we return immediately. The
431 * actually closing is done the same either way.
433 * If the close is due to the process exiting, we never
437 if (sock_flag(sk
, SOCK_LINGER
) &&
438 !(current
->flags
& PF_EXITING
))
439 timeout
= sk
->sk_lingertime
;
441 sk
->sk_prot
->close(sk
, timeout
);
445 EXPORT_SYMBOL(inet_release
);
447 /* It is off by default, see below. */
448 int sysctl_ip_nonlocal_bind __read_mostly
;
449 EXPORT_SYMBOL(sysctl_ip_nonlocal_bind
);
451 int inet_bind(struct socket
*sock
, struct sockaddr
*uaddr
, int addr_len
)
453 struct sockaddr_in
*addr
= (struct sockaddr_in
*)uaddr
;
454 struct sock
*sk
= sock
->sk
;
455 struct inet_sock
*inet
= inet_sk(sk
);
460 /* If the socket has its own bind function then use it. (RAW) */
461 if (sk
->sk_prot
->bind
) {
462 err
= sk
->sk_prot
->bind(sk
, uaddr
, addr_len
);
466 if (addr_len
< sizeof(struct sockaddr_in
))
469 if (addr
->sin_family
!= AF_INET
) {
470 /* Compatibility games : accept AF_UNSPEC (mapped to AF_INET)
471 * only if s_addr is INADDR_ANY.
474 if (addr
->sin_family
!= AF_UNSPEC
||
475 addr
->sin_addr
.s_addr
!= htonl(INADDR_ANY
))
479 chk_addr_ret
= inet_addr_type(sock_net(sk
), addr
->sin_addr
.s_addr
);
481 /* Not specified by any standard per-se, however it breaks too
482 * many applications when removed. It is unfortunate since
483 * allowing applications to make a non-local bind solves
484 * several problems with systems using dynamic addressing.
485 * (ie. your servers still start up even if your ISDN link
486 * is temporarily down)
488 err
= -EADDRNOTAVAIL
;
489 if (!sysctl_ip_nonlocal_bind
&&
490 !(inet
->freebind
|| inet
->transparent
) &&
491 addr
->sin_addr
.s_addr
!= htonl(INADDR_ANY
) &&
492 chk_addr_ret
!= RTN_LOCAL
&&
493 chk_addr_ret
!= RTN_MULTICAST
&&
494 chk_addr_ret
!= RTN_BROADCAST
)
497 snum
= ntohs(addr
->sin_port
);
499 if (snum
&& snum
< PROT_SOCK
&& !capable(CAP_NET_BIND_SERVICE
))
502 /* We keep a pair of addresses. rcv_saddr is the one
503 * used by hash lookups, and saddr is used for transmit.
505 * In the BSD API these are the same except where it
506 * would be illegal to use them (multicast/broadcast) in
507 * which case the sending device address is used.
511 /* Check these errors (active socket, double bind). */
513 if (sk
->sk_state
!= TCP_CLOSE
|| inet
->inet_num
)
514 goto out_release_sock
;
516 inet
->inet_rcv_saddr
= inet
->inet_saddr
= addr
->sin_addr
.s_addr
;
517 if (chk_addr_ret
== RTN_MULTICAST
|| chk_addr_ret
== RTN_BROADCAST
)
518 inet
->inet_saddr
= 0; /* Use device */
520 /* Make sure we are allowed to bind here. */
521 if (sk
->sk_prot
->get_port(sk
, snum
)) {
522 inet
->inet_saddr
= inet
->inet_rcv_saddr
= 0;
524 goto out_release_sock
;
527 if (inet
->inet_rcv_saddr
)
528 sk
->sk_userlocks
|= SOCK_BINDADDR_LOCK
;
530 sk
->sk_userlocks
|= SOCK_BINDPORT_LOCK
;
531 inet
->inet_sport
= htons(inet
->inet_num
);
532 inet
->inet_daddr
= 0;
533 inet
->inet_dport
= 0;
541 EXPORT_SYMBOL(inet_bind
);
543 int inet_dgram_connect(struct socket
*sock
, struct sockaddr
*uaddr
,
544 int addr_len
, int flags
)
546 struct sock
*sk
= sock
->sk
;
548 if (addr_len
< sizeof(uaddr
->sa_family
))
550 if (uaddr
->sa_family
== AF_UNSPEC
)
551 return sk
->sk_prot
->disconnect(sk
, flags
);
553 if (!inet_sk(sk
)->inet_num
&& inet_autobind(sk
))
555 return sk
->sk_prot
->connect(sk
, uaddr
, addr_len
);
557 EXPORT_SYMBOL(inet_dgram_connect
);
559 static long inet_wait_for_connect(struct sock
*sk
, long timeo
, int writebias
)
563 prepare_to_wait(sk_sleep(sk
), &wait
, TASK_INTERRUPTIBLE
);
564 sk
->sk_write_pending
+= writebias
;
566 /* Basic assumption: if someone sets sk->sk_err, he _must_
567 * change state of the socket from TCP_SYN_*.
568 * Connect() does not allow to get error notifications
569 * without closing the socket.
571 while ((1 << sk
->sk_state
) & (TCPF_SYN_SENT
| TCPF_SYN_RECV
)) {
573 timeo
= schedule_timeout(timeo
);
575 if (signal_pending(current
) || !timeo
)
577 prepare_to_wait(sk_sleep(sk
), &wait
, TASK_INTERRUPTIBLE
);
579 finish_wait(sk_sleep(sk
), &wait
);
580 sk
->sk_write_pending
-= writebias
;
585 * Connect to a remote host. There is regrettably still a little
586 * TCP 'magic' in here.
588 int __inet_stream_connect(struct socket
*sock
, struct sockaddr
*uaddr
,
589 int addr_len
, int flags
)
591 struct sock
*sk
= sock
->sk
;
595 if (addr_len
< sizeof(uaddr
->sa_family
))
598 if (uaddr
->sa_family
== AF_UNSPEC
) {
599 err
= sk
->sk_prot
->disconnect(sk
, flags
);
600 sock
->state
= err
? SS_DISCONNECTING
: SS_UNCONNECTED
;
604 switch (sock
->state
) {
613 /* Fall out of switch with err, set for this state */
617 if (sk
->sk_state
!= TCP_CLOSE
)
620 err
= sk
->sk_prot
->connect(sk
, uaddr
, addr_len
);
624 sock
->state
= SS_CONNECTING
;
626 /* Just entered SS_CONNECTING state; the only
627 * difference is that return value in non-blocking
628 * case is EINPROGRESS, rather than EALREADY.
634 timeo
= sock_sndtimeo(sk
, flags
& O_NONBLOCK
);
636 if ((1 << sk
->sk_state
) & (TCPF_SYN_SENT
| TCPF_SYN_RECV
)) {
637 int writebias
= (sk
->sk_protocol
== IPPROTO_TCP
) &&
638 tcp_sk(sk
)->fastopen_req
&&
639 tcp_sk(sk
)->fastopen_req
->data
? 1 : 0;
641 /* Error code is set above */
642 if (!timeo
|| !inet_wait_for_connect(sk
, timeo
, writebias
))
645 err
= sock_intr_errno(timeo
);
646 if (signal_pending(current
))
650 /* Connection was closed by RST, timeout, ICMP error
651 * or another process disconnected us.
653 if (sk
->sk_state
== TCP_CLOSE
)
656 /* sk->sk_err may be not zero now, if RECVERR was ordered by user
657 * and error was received after socket entered established state.
658 * Hence, it is handled normally after connect() return successfully.
661 sock
->state
= SS_CONNECTED
;
667 err
= sock_error(sk
) ? : -ECONNABORTED
;
668 sock
->state
= SS_UNCONNECTED
;
669 if (sk
->sk_prot
->disconnect(sk
, flags
))
670 sock
->state
= SS_DISCONNECTING
;
673 EXPORT_SYMBOL(__inet_stream_connect
);
675 int inet_stream_connect(struct socket
*sock
, struct sockaddr
*uaddr
,
676 int addr_len
, int flags
)
681 err
= __inet_stream_connect(sock
, uaddr
, addr_len
, flags
);
682 release_sock(sock
->sk
);
685 EXPORT_SYMBOL(inet_stream_connect
);
688 * Accept a pending connection. The TCP layer now gives BSD semantics.
691 int inet_accept(struct socket
*sock
, struct socket
*newsock
, int flags
)
693 struct sock
*sk1
= sock
->sk
;
695 struct sock
*sk2
= sk1
->sk_prot
->accept(sk1
, flags
, &err
);
702 sock_rps_record_flow(sk2
);
703 WARN_ON(!((1 << sk2
->sk_state
) &
704 (TCPF_ESTABLISHED
| TCPF_CLOSE_WAIT
| TCPF_CLOSE
)));
706 sock_graft(sk2
, newsock
);
708 newsock
->state
= SS_CONNECTED
;
714 EXPORT_SYMBOL(inet_accept
);
718 * This does both peername and sockname.
720 int inet_getname(struct socket
*sock
, struct sockaddr
*uaddr
,
721 int *uaddr_len
, int peer
)
723 struct sock
*sk
= sock
->sk
;
724 struct inet_sock
*inet
= inet_sk(sk
);
725 DECLARE_SOCKADDR(struct sockaddr_in
*, sin
, uaddr
);
727 sin
->sin_family
= AF_INET
;
729 if (!inet
->inet_dport
||
730 (((1 << sk
->sk_state
) & (TCPF_CLOSE
| TCPF_SYN_SENT
)) &&
733 sin
->sin_port
= inet
->inet_dport
;
734 sin
->sin_addr
.s_addr
= inet
->inet_daddr
;
736 __be32 addr
= inet
->inet_rcv_saddr
;
738 addr
= inet
->inet_saddr
;
739 sin
->sin_port
= inet
->inet_sport
;
740 sin
->sin_addr
.s_addr
= addr
;
742 memset(sin
->sin_zero
, 0, sizeof(sin
->sin_zero
));
743 *uaddr_len
= sizeof(*sin
);
746 EXPORT_SYMBOL(inet_getname
);
748 int inet_sendmsg(struct kiocb
*iocb
, struct socket
*sock
, struct msghdr
*msg
,
751 struct sock
*sk
= sock
->sk
;
753 sock_rps_record_flow(sk
);
755 /* We may need to bind the socket. */
756 if (!inet_sk(sk
)->inet_num
&& !sk
->sk_prot
->no_autobind
&&
760 return sk
->sk_prot
->sendmsg(iocb
, sk
, msg
, size
);
762 EXPORT_SYMBOL(inet_sendmsg
);
764 ssize_t
inet_sendpage(struct socket
*sock
, struct page
*page
, int offset
,
765 size_t size
, int flags
)
767 struct sock
*sk
= sock
->sk
;
769 sock_rps_record_flow(sk
);
771 /* We may need to bind the socket. */
772 if (!inet_sk(sk
)->inet_num
&& !sk
->sk_prot
->no_autobind
&&
776 if (sk
->sk_prot
->sendpage
)
777 return sk
->sk_prot
->sendpage(sk
, page
, offset
, size
, flags
);
778 return sock_no_sendpage(sock
, page
, offset
, size
, flags
);
780 EXPORT_SYMBOL(inet_sendpage
);
782 int inet_recvmsg(struct kiocb
*iocb
, struct socket
*sock
, struct msghdr
*msg
,
783 size_t size
, int flags
)
785 struct sock
*sk
= sock
->sk
;
789 sock_rps_record_flow(sk
);
791 err
= sk
->sk_prot
->recvmsg(iocb
, sk
, msg
, size
, flags
& MSG_DONTWAIT
,
792 flags
& ~MSG_DONTWAIT
, &addr_len
);
794 msg
->msg_namelen
= addr_len
;
797 EXPORT_SYMBOL(inet_recvmsg
);
799 int inet_shutdown(struct socket
*sock
, int how
)
801 struct sock
*sk
= sock
->sk
;
804 /* This should really check to make sure
805 * the socket is a TCP socket. (WHY AC...)
807 how
++; /* maps 0->1 has the advantage of making bit 1 rcvs and
810 if ((how
& ~SHUTDOWN_MASK
) || !how
) /* MAXINT->0 */
814 if (sock
->state
== SS_CONNECTING
) {
815 if ((1 << sk
->sk_state
) &
816 (TCPF_SYN_SENT
| TCPF_SYN_RECV
| TCPF_CLOSE
))
817 sock
->state
= SS_DISCONNECTING
;
819 sock
->state
= SS_CONNECTED
;
822 switch (sk
->sk_state
) {
825 /* Hack to wake up other listeners, who can poll for
826 POLLHUP, even on eg. unconnected UDP sockets -- RR */
828 sk
->sk_shutdown
|= how
;
829 if (sk
->sk_prot
->shutdown
)
830 sk
->sk_prot
->shutdown(sk
, how
);
833 /* Remaining two branches are temporary solution for missing
834 * close() in multithreaded environment. It is _not_ a good idea,
835 * but we have no choice until close() is repaired at VFS level.
838 if (!(how
& RCV_SHUTDOWN
))
842 err
= sk
->sk_prot
->disconnect(sk
, O_NONBLOCK
);
843 sock
->state
= err
? SS_DISCONNECTING
: SS_UNCONNECTED
;
847 /* Wake up anyone sleeping in poll. */
848 sk
->sk_state_change(sk
);
852 EXPORT_SYMBOL(inet_shutdown
);
855 * ioctl() calls you can issue on an INET socket. Most of these are
856 * device configuration and stuff and very rarely used. Some ioctls
857 * pass on to the socket itself.
859 * NOTE: I like the idea of a module for the config stuff. ie ifconfig
860 * loads the devconfigure module does its configuring and unloads it.
861 * There's a good 20K of config code hanging around the kernel.
864 int inet_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
866 struct sock
*sk
= sock
->sk
;
868 struct net
*net
= sock_net(sk
);
872 err
= sock_get_timestamp(sk
, (struct timeval __user
*)arg
);
875 err
= sock_get_timestampns(sk
, (struct timespec __user
*)arg
);
880 err
= ip_rt_ioctl(net
, cmd
, (void __user
*)arg
);
885 err
= arp_ioctl(net
, cmd
, (void __user
*)arg
);
898 err
= devinet_ioctl(net
, cmd
, (void __user
*)arg
);
901 if (sk
->sk_prot
->ioctl
)
902 err
= sk
->sk_prot
->ioctl(sk
, cmd
, arg
);
909 EXPORT_SYMBOL(inet_ioctl
);
912 static int inet_compat_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
914 struct sock
*sk
= sock
->sk
;
915 int err
= -ENOIOCTLCMD
;
917 if (sk
->sk_prot
->compat_ioctl
)
918 err
= sk
->sk_prot
->compat_ioctl(sk
, cmd
, arg
);
924 const struct proto_ops inet_stream_ops
= {
926 .owner
= THIS_MODULE
,
927 .release
= inet_release
,
929 .connect
= inet_stream_connect
,
930 .socketpair
= sock_no_socketpair
,
931 .accept
= inet_accept
,
932 .getname
= inet_getname
,
935 .listen
= inet_listen
,
936 .shutdown
= inet_shutdown
,
937 .setsockopt
= sock_common_setsockopt
,
938 .getsockopt
= sock_common_getsockopt
,
939 .sendmsg
= inet_sendmsg
,
940 .recvmsg
= inet_recvmsg
,
941 .mmap
= sock_no_mmap
,
942 .sendpage
= inet_sendpage
,
943 .splice_read
= tcp_splice_read
,
945 .compat_setsockopt
= compat_sock_common_setsockopt
,
946 .compat_getsockopt
= compat_sock_common_getsockopt
,
947 .compat_ioctl
= inet_compat_ioctl
,
950 EXPORT_SYMBOL(inet_stream_ops
);
952 const struct proto_ops inet_dgram_ops
= {
954 .owner
= THIS_MODULE
,
955 .release
= inet_release
,
957 .connect
= inet_dgram_connect
,
958 .socketpair
= sock_no_socketpair
,
959 .accept
= sock_no_accept
,
960 .getname
= inet_getname
,
963 .listen
= sock_no_listen
,
964 .shutdown
= inet_shutdown
,
965 .setsockopt
= sock_common_setsockopt
,
966 .getsockopt
= sock_common_getsockopt
,
967 .sendmsg
= inet_sendmsg
,
968 .recvmsg
= inet_recvmsg
,
969 .mmap
= sock_no_mmap
,
970 .sendpage
= inet_sendpage
,
972 .compat_setsockopt
= compat_sock_common_setsockopt
,
973 .compat_getsockopt
= compat_sock_common_getsockopt
,
974 .compat_ioctl
= inet_compat_ioctl
,
977 EXPORT_SYMBOL(inet_dgram_ops
);
980 * For SOCK_RAW sockets; should be the same as inet_dgram_ops but without
983 static const struct proto_ops inet_sockraw_ops
= {
985 .owner
= THIS_MODULE
,
986 .release
= inet_release
,
988 .connect
= inet_dgram_connect
,
989 .socketpair
= sock_no_socketpair
,
990 .accept
= sock_no_accept
,
991 .getname
= inet_getname
,
992 .poll
= datagram_poll
,
994 .listen
= sock_no_listen
,
995 .shutdown
= inet_shutdown
,
996 .setsockopt
= sock_common_setsockopt
,
997 .getsockopt
= sock_common_getsockopt
,
998 .sendmsg
= inet_sendmsg
,
999 .recvmsg
= inet_recvmsg
,
1000 .mmap
= sock_no_mmap
,
1001 .sendpage
= inet_sendpage
,
1002 #ifdef CONFIG_COMPAT
1003 .compat_setsockopt
= compat_sock_common_setsockopt
,
1004 .compat_getsockopt
= compat_sock_common_getsockopt
,
1005 .compat_ioctl
= inet_compat_ioctl
,
1009 static const struct net_proto_family inet_family_ops
= {
1011 .create
= inet_create
,
1012 .owner
= THIS_MODULE
,
1015 /* Upon startup we insert all the elements in inetsw_array[] into
1016 * the linked list inetsw.
1018 static struct inet_protosw inetsw_array
[] =
1021 .type
= SOCK_STREAM
,
1022 .protocol
= IPPROTO_TCP
,
1024 .ops
= &inet_stream_ops
,
1026 .flags
= INET_PROTOSW_PERMANENT
|
1032 .protocol
= IPPROTO_UDP
,
1034 .ops
= &inet_dgram_ops
,
1035 .no_check
= UDP_CSUM_DEFAULT
,
1036 .flags
= INET_PROTOSW_PERMANENT
,
1041 .protocol
= IPPROTO_ICMP
,
1043 .ops
= &inet_dgram_ops
,
1044 .no_check
= UDP_CSUM_DEFAULT
,
1045 .flags
= INET_PROTOSW_REUSE
,
1050 .protocol
= IPPROTO_IP
, /* wild card */
1052 .ops
= &inet_sockraw_ops
,
1053 .no_check
= UDP_CSUM_DEFAULT
,
1054 .flags
= INET_PROTOSW_REUSE
,
1058 #define INETSW_ARRAY_LEN ARRAY_SIZE(inetsw_array)
1060 void inet_register_protosw(struct inet_protosw
*p
)
1062 struct list_head
*lh
;
1063 struct inet_protosw
*answer
;
1064 int protocol
= p
->protocol
;
1065 struct list_head
*last_perm
;
1067 spin_lock_bh(&inetsw_lock
);
1069 if (p
->type
>= SOCK_MAX
)
1072 /* If we are trying to override a permanent protocol, bail. */
1074 last_perm
= &inetsw
[p
->type
];
1075 list_for_each(lh
, &inetsw
[p
->type
]) {
1076 answer
= list_entry(lh
, struct inet_protosw
, list
);
1078 /* Check only the non-wild match. */
1079 if (INET_PROTOSW_PERMANENT
& answer
->flags
) {
1080 if (protocol
== answer
->protocol
)
1090 /* Add the new entry after the last permanent entry if any, so that
1091 * the new entry does not override a permanent entry when matched with
1092 * a wild-card protocol. But it is allowed to override any existing
1093 * non-permanent entry. This means that when we remove this entry, the
1094 * system automatically returns to the old behavior.
1096 list_add_rcu(&p
->list
, last_perm
);
1098 spin_unlock_bh(&inetsw_lock
);
1103 pr_err("Attempt to override permanent protocol %d\n", protocol
);
1107 pr_err("Ignoring attempt to register invalid socket type %d\n",
1111 EXPORT_SYMBOL(inet_register_protosw
);
1113 void inet_unregister_protosw(struct inet_protosw
*p
)
1115 if (INET_PROTOSW_PERMANENT
& p
->flags
) {
1116 pr_err("Attempt to unregister permanent protocol %d\n",
1119 spin_lock_bh(&inetsw_lock
);
1120 list_del_rcu(&p
->list
);
1121 spin_unlock_bh(&inetsw_lock
);
1126 EXPORT_SYMBOL(inet_unregister_protosw
);
1129 * Shall we try to damage output packets if routing dev changes?
1132 int sysctl_ip_dynaddr __read_mostly
;
1134 static int inet_sk_reselect_saddr(struct sock
*sk
)
1136 struct inet_sock
*inet
= inet_sk(sk
);
1137 __be32 old_saddr
= inet
->inet_saddr
;
1138 __be32 daddr
= inet
->inet_daddr
;
1142 struct ip_options_rcu
*inet_opt
;
1144 inet_opt
= rcu_dereference_protected(inet
->inet_opt
,
1145 sock_owned_by_user(sk
));
1146 if (inet_opt
&& inet_opt
->opt
.srr
)
1147 daddr
= inet_opt
->opt
.faddr
;
1149 /* Query new route. */
1150 fl4
= &inet
->cork
.fl
.u
.ip4
;
1151 rt
= ip_route_connect(fl4
, daddr
, 0, RT_CONN_FLAGS(sk
),
1152 sk
->sk_bound_dev_if
, sk
->sk_protocol
,
1153 inet
->inet_sport
, inet
->inet_dport
, sk
, false);
1157 sk_setup_caps(sk
, &rt
->dst
);
1159 new_saddr
= fl4
->saddr
;
1161 if (new_saddr
== old_saddr
)
1164 if (sysctl_ip_dynaddr
> 1) {
1165 pr_info("%s(): shifting inet->saddr from %pI4 to %pI4\n",
1166 __func__
, &old_saddr
, &new_saddr
);
1169 inet
->inet_saddr
= inet
->inet_rcv_saddr
= new_saddr
;
1172 * XXX The only one ugly spot where we need to
1173 * XXX really change the sockets identity after
1174 * XXX it has entered the hashes. -DaveM
1176 * Besides that, it does not check for connection
1177 * uniqueness. Wait for troubles.
1179 __sk_prot_rehash(sk
);
1183 int inet_sk_rebuild_header(struct sock
*sk
)
1185 struct inet_sock
*inet
= inet_sk(sk
);
1186 struct rtable
*rt
= (struct rtable
*)__sk_dst_check(sk
, 0);
1188 struct ip_options_rcu
*inet_opt
;
1192 /* Route is OK, nothing to do. */
1198 inet_opt
= rcu_dereference(inet
->inet_opt
);
1199 daddr
= inet
->inet_daddr
;
1200 if (inet_opt
&& inet_opt
->opt
.srr
)
1201 daddr
= inet_opt
->opt
.faddr
;
1203 fl4
= &inet
->cork
.fl
.u
.ip4
;
1204 rt
= ip_route_output_ports(sock_net(sk
), fl4
, sk
, daddr
, inet
->inet_saddr
,
1205 inet
->inet_dport
, inet
->inet_sport
,
1206 sk
->sk_protocol
, RT_CONN_FLAGS(sk
),
1207 sk
->sk_bound_dev_if
);
1210 sk_setup_caps(sk
, &rt
->dst
);
1214 /* Routing failed... */
1215 sk
->sk_route_caps
= 0;
1217 * Other protocols have to map its equivalent state to TCP_SYN_SENT.
1218 * DCCP maps its DCCP_REQUESTING state to TCP_SYN_SENT. -acme
1220 if (!sysctl_ip_dynaddr
||
1221 sk
->sk_state
!= TCP_SYN_SENT
||
1222 (sk
->sk_userlocks
& SOCK_BINDADDR_LOCK
) ||
1223 (err
= inet_sk_reselect_saddr(sk
)) != 0)
1224 sk
->sk_err_soft
= -err
;
1229 EXPORT_SYMBOL(inet_sk_rebuild_header
);
1231 static int inet_gso_send_check(struct sk_buff
*skb
)
1233 const struct net_protocol
*ops
;
1234 const struct iphdr
*iph
;
1239 if (unlikely(!pskb_may_pull(skb
, sizeof(*iph
))))
1244 if (ihl
< sizeof(*iph
))
1247 if (unlikely(!pskb_may_pull(skb
, ihl
)))
1250 __skb_pull(skb
, ihl
);
1251 skb_reset_transport_header(skb
);
1253 proto
= iph
->protocol
;
1254 err
= -EPROTONOSUPPORT
;
1257 ops
= rcu_dereference(inet_protos
[proto
]);
1258 if (likely(ops
&& ops
->gso_send_check
))
1259 err
= ops
->gso_send_check(skb
);
1266 static struct sk_buff
*inet_gso_segment(struct sk_buff
*skb
,
1267 netdev_features_t features
)
1269 struct sk_buff
*segs
= ERR_PTR(-EINVAL
);
1270 const struct net_protocol
*ops
;
1275 unsigned int offset
= 0;
1277 if (!(features
& NETIF_F_V4_CSUM
))
1278 features
&= ~NETIF_F_SG
;
1280 if (unlikely(skb_shinfo(skb
)->gso_type
&
1288 if (unlikely(!pskb_may_pull(skb
, sizeof(*iph
))))
1293 if (ihl
< sizeof(*iph
))
1296 if (unlikely(!pskb_may_pull(skb
, ihl
)))
1299 __skb_pull(skb
, ihl
);
1300 skb_reset_transport_header(skb
);
1302 id
= ntohs(iph
->id
);
1303 proto
= iph
->protocol
;
1304 segs
= ERR_PTR(-EPROTONOSUPPORT
);
1307 ops
= rcu_dereference(inet_protos
[proto
]);
1308 if (likely(ops
&& ops
->gso_segment
))
1309 segs
= ops
->gso_segment(skb
, features
);
1312 if (!segs
|| IS_ERR(segs
))
1318 if (proto
== IPPROTO_UDP
) {
1319 iph
->id
= htons(id
);
1320 iph
->frag_off
= htons(offset
>> 3);
1321 if (skb
->next
!= NULL
)
1322 iph
->frag_off
|= htons(IP_MF
);
1323 offset
+= (skb
->len
- skb
->mac_len
- iph
->ihl
* 4);
1325 iph
->id
= htons(id
++);
1326 iph
->tot_len
= htons(skb
->len
- skb
->mac_len
);
1328 iph
->check
= ip_fast_csum(skb_network_header(skb
), iph
->ihl
);
1329 } while ((skb
= skb
->next
));
1335 static struct sk_buff
**inet_gro_receive(struct sk_buff
**head
,
1336 struct sk_buff
*skb
)
1338 const struct net_protocol
*ops
;
1339 struct sk_buff
**pp
= NULL
;
1341 const struct iphdr
*iph
;
1348 off
= skb_gro_offset(skb
);
1349 hlen
= off
+ sizeof(*iph
);
1350 iph
= skb_gro_header_fast(skb
, off
);
1351 if (skb_gro_header_hard(skb
, hlen
)) {
1352 iph
= skb_gro_header_slow(skb
, hlen
, off
);
1357 proto
= iph
->protocol
;
1360 ops
= rcu_dereference(inet_protos
[proto
]);
1361 if (!ops
|| !ops
->gro_receive
)
1364 if (*(u8
*)iph
!= 0x45)
1367 if (unlikely(ip_fast_csum((u8
*)iph
, iph
->ihl
)))
1370 id
= ntohl(*(__be32
*)&iph
->id
);
1371 flush
= (u16
)((ntohl(*(__be32
*)iph
) ^ skb_gro_len(skb
)) | (id
^ IP_DF
));
1374 for (p
= *head
; p
; p
= p
->next
) {
1377 if (!NAPI_GRO_CB(p
)->same_flow
)
1382 if ((iph
->protocol
^ iph2
->protocol
) |
1383 (iph
->tos
^ iph2
->tos
) |
1384 ((__force u32
)iph
->saddr
^ (__force u32
)iph2
->saddr
) |
1385 ((__force u32
)iph
->daddr
^ (__force u32
)iph2
->daddr
)) {
1386 NAPI_GRO_CB(p
)->same_flow
= 0;
1390 /* All fields must match except length and checksum. */
1391 NAPI_GRO_CB(p
)->flush
|=
1392 (iph
->ttl
^ iph2
->ttl
) |
1393 ((u16
)(ntohs(iph2
->id
) + NAPI_GRO_CB(p
)->count
) ^ id
);
1395 NAPI_GRO_CB(p
)->flush
|= flush
;
1398 NAPI_GRO_CB(skb
)->flush
|= flush
;
1399 skb_gro_pull(skb
, sizeof(*iph
));
1400 skb_set_transport_header(skb
, skb_gro_offset(skb
));
1402 pp
= ops
->gro_receive(head
, skb
);
1408 NAPI_GRO_CB(skb
)->flush
|= flush
;
1413 static int inet_gro_complete(struct sk_buff
*skb
)
1415 __be16 newlen
= htons(skb
->len
- skb_network_offset(skb
));
1416 struct iphdr
*iph
= ip_hdr(skb
);
1417 const struct net_protocol
*ops
;
1418 int proto
= iph
->protocol
;
1421 csum_replace2(&iph
->check
, iph
->tot_len
, newlen
);
1422 iph
->tot_len
= newlen
;
1425 ops
= rcu_dereference(inet_protos
[proto
]);
1426 if (WARN_ON(!ops
|| !ops
->gro_complete
))
1429 err
= ops
->gro_complete(skb
);
1437 int inet_ctl_sock_create(struct sock
**sk
, unsigned short family
,
1438 unsigned short type
, unsigned char protocol
,
1441 struct socket
*sock
;
1442 int rc
= sock_create_kern(family
, type
, protocol
, &sock
);
1446 (*sk
)->sk_allocation
= GFP_ATOMIC
;
1448 * Unhash it so that IP input processing does not even see it,
1449 * we do not wish this socket to see incoming packets.
1451 (*sk
)->sk_prot
->unhash(*sk
);
1453 sk_change_net(*sk
, net
);
1457 EXPORT_SYMBOL_GPL(inet_ctl_sock_create
);
1459 unsigned long snmp_fold_field(void __percpu
*mib
[], int offt
)
1461 unsigned long res
= 0;
1464 for_each_possible_cpu(i
) {
1465 for (j
= 0; j
< SNMP_ARRAY_SZ
; j
++)
1466 res
+= *(((unsigned long *) per_cpu_ptr(mib
[j
], i
)) + offt
);
1470 EXPORT_SYMBOL_GPL(snmp_fold_field
);
1472 #if BITS_PER_LONG==32
1474 u64
snmp_fold_field64(void __percpu
*mib
[], int offt
, size_t syncp_offset
)
1479 for_each_possible_cpu(cpu
) {
1481 struct u64_stats_sync
*syncp
;
1485 bhptr
= per_cpu_ptr(mib
[0], cpu
);
1486 syncp
= (struct u64_stats_sync
*)(bhptr
+ syncp_offset
);
1488 start
= u64_stats_fetch_begin_bh(syncp
);
1489 v
= *(((u64
*) bhptr
) + offt
);
1490 } while (u64_stats_fetch_retry_bh(syncp
, start
));
1496 EXPORT_SYMBOL_GPL(snmp_fold_field64
);
1499 int snmp_mib_init(void __percpu
*ptr
[2], size_t mibsize
, size_t align
)
1501 BUG_ON(ptr
== NULL
);
1502 ptr
[0] = __alloc_percpu(mibsize
, align
);
1505 #if SNMP_ARRAY_SZ == 2
1506 ptr
[1] = __alloc_percpu(mibsize
, align
);
1508 free_percpu(ptr
[0]);
1515 EXPORT_SYMBOL_GPL(snmp_mib_init
);
1517 void snmp_mib_free(void __percpu
*ptr
[SNMP_ARRAY_SZ
])
1521 BUG_ON(ptr
== NULL
);
1522 for (i
= 0; i
< SNMP_ARRAY_SZ
; i
++) {
1523 free_percpu(ptr
[i
]);
1527 EXPORT_SYMBOL_GPL(snmp_mib_free
);
1529 #ifdef CONFIG_IP_MULTICAST
1530 static const struct net_protocol igmp_protocol
= {
1531 .handler
= igmp_rcv
,
1536 static const struct net_protocol tcp_protocol
= {
1537 .early_demux
= tcp_v4_early_demux
,
1538 .handler
= tcp_v4_rcv
,
1539 .err_handler
= tcp_v4_err
,
1540 .gso_send_check
= tcp_v4_gso_send_check
,
1541 .gso_segment
= tcp_tso_segment
,
1542 .gro_receive
= tcp4_gro_receive
,
1543 .gro_complete
= tcp4_gro_complete
,
1548 static const struct net_protocol udp_protocol
= {
1550 .err_handler
= udp_err
,
1551 .gso_send_check
= udp4_ufo_send_check
,
1552 .gso_segment
= udp4_ufo_fragment
,
1557 static const struct net_protocol icmp_protocol
= {
1558 .handler
= icmp_rcv
,
1559 .err_handler
= ping_err
,
1564 static __net_init
int ipv4_mib_init_net(struct net
*net
)
1566 if (snmp_mib_init((void __percpu
**)net
->mib
.tcp_statistics
,
1567 sizeof(struct tcp_mib
),
1568 __alignof__(struct tcp_mib
)) < 0)
1570 if (snmp_mib_init((void __percpu
**)net
->mib
.ip_statistics
,
1571 sizeof(struct ipstats_mib
),
1572 __alignof__(struct ipstats_mib
)) < 0)
1574 if (snmp_mib_init((void __percpu
**)net
->mib
.net_statistics
,
1575 sizeof(struct linux_mib
),
1576 __alignof__(struct linux_mib
)) < 0)
1578 if (snmp_mib_init((void __percpu
**)net
->mib
.udp_statistics
,
1579 sizeof(struct udp_mib
),
1580 __alignof__(struct udp_mib
)) < 0)
1582 if (snmp_mib_init((void __percpu
**)net
->mib
.udplite_statistics
,
1583 sizeof(struct udp_mib
),
1584 __alignof__(struct udp_mib
)) < 0)
1585 goto err_udplite_mib
;
1586 if (snmp_mib_init((void __percpu
**)net
->mib
.icmp_statistics
,
1587 sizeof(struct icmp_mib
),
1588 __alignof__(struct icmp_mib
)) < 0)
1590 net
->mib
.icmpmsg_statistics
= kzalloc(sizeof(struct icmpmsg_mib
),
1592 if (!net
->mib
.icmpmsg_statistics
)
1593 goto err_icmpmsg_mib
;
1599 snmp_mib_free((void __percpu
**)net
->mib
.icmp_statistics
);
1601 snmp_mib_free((void __percpu
**)net
->mib
.udplite_statistics
);
1603 snmp_mib_free((void __percpu
**)net
->mib
.udp_statistics
);
1605 snmp_mib_free((void __percpu
**)net
->mib
.net_statistics
);
1607 snmp_mib_free((void __percpu
**)net
->mib
.ip_statistics
);
1609 snmp_mib_free((void __percpu
**)net
->mib
.tcp_statistics
);
1614 static __net_exit
void ipv4_mib_exit_net(struct net
*net
)
1616 kfree(net
->mib
.icmpmsg_statistics
);
1617 snmp_mib_free((void __percpu
**)net
->mib
.icmp_statistics
);
1618 snmp_mib_free((void __percpu
**)net
->mib
.udplite_statistics
);
1619 snmp_mib_free((void __percpu
**)net
->mib
.udp_statistics
);
1620 snmp_mib_free((void __percpu
**)net
->mib
.net_statistics
);
1621 snmp_mib_free((void __percpu
**)net
->mib
.ip_statistics
);
1622 snmp_mib_free((void __percpu
**)net
->mib
.tcp_statistics
);
1625 static __net_initdata
struct pernet_operations ipv4_mib_ops
= {
1626 .init
= ipv4_mib_init_net
,
1627 .exit
= ipv4_mib_exit_net
,
1630 static int __init
init_ipv4_mibs(void)
1632 return register_pernet_subsys(&ipv4_mib_ops
);
1635 static int ipv4_proc_init(void);
1638 * IP protocol layer initialiser
1641 static struct packet_type ip_packet_type __read_mostly
= {
1642 .type
= cpu_to_be16(ETH_P_IP
),
1644 .gso_send_check
= inet_gso_send_check
,
1645 .gso_segment
= inet_gso_segment
,
1646 .gro_receive
= inet_gro_receive
,
1647 .gro_complete
= inet_gro_complete
,
1650 static int __init
inet_init(void)
1652 struct sk_buff
*dummy_skb
;
1653 struct inet_protosw
*q
;
1654 struct list_head
*r
;
1657 BUILD_BUG_ON(sizeof(struct inet_skb_parm
) > sizeof(dummy_skb
->cb
));
1659 sysctl_local_reserved_ports
= kzalloc(65536 / 8, GFP_KERNEL
);
1660 if (!sysctl_local_reserved_ports
)
1663 rc
= proto_register(&tcp_prot
, 1);
1665 goto out_free_reserved_ports
;
1667 rc
= proto_register(&udp_prot
, 1);
1669 goto out_unregister_tcp_proto
;
1671 rc
= proto_register(&raw_prot
, 1);
1673 goto out_unregister_udp_proto
;
1675 rc
= proto_register(&ping_prot
, 1);
1677 goto out_unregister_raw_proto
;
1680 * Tell SOCKET that we are alive...
1683 (void)sock_register(&inet_family_ops
);
1685 #ifdef CONFIG_SYSCTL
1686 ip_static_sysctl_init();
1689 tcp_prot
.sysctl_mem
= init_net
.ipv4
.sysctl_tcp_mem
;
1692 * Add all the base protocols.
1695 if (inet_add_protocol(&icmp_protocol
, IPPROTO_ICMP
) < 0)
1696 pr_crit("%s: Cannot add ICMP protocol\n", __func__
);
1697 if (inet_add_protocol(&udp_protocol
, IPPROTO_UDP
) < 0)
1698 pr_crit("%s: Cannot add UDP protocol\n", __func__
);
1699 if (inet_add_protocol(&tcp_protocol
, IPPROTO_TCP
) < 0)
1700 pr_crit("%s: Cannot add TCP protocol\n", __func__
);
1701 #ifdef CONFIG_IP_MULTICAST
1702 if (inet_add_protocol(&igmp_protocol
, IPPROTO_IGMP
) < 0)
1703 pr_crit("%s: Cannot add IGMP protocol\n", __func__
);
1706 /* Register the socket-side information for inet_create. */
1707 for (r
= &inetsw
[0]; r
< &inetsw
[SOCK_MAX
]; ++r
)
1710 for (q
= inetsw_array
; q
< &inetsw_array
[INETSW_ARRAY_LEN
]; ++q
)
1711 inet_register_protosw(q
);
1714 * Set the ARP module up
1720 * Set the IP module up
1727 /* Setup TCP slab cache for open requests. */
1730 /* Setup UDP memory threshold */
1733 /* Add UDP-Lite (RFC 3828) */
1734 udplite4_register();
1739 * Set the ICMP layer up
1742 if (icmp_init() < 0)
1743 panic("Failed to create the ICMP control socket.\n");
1746 * Initialise the multicast router
1748 #if defined(CONFIG_IP_MROUTE)
1750 pr_crit("%s: Cannot init ipv4 mroute\n", __func__
);
1753 * Initialise per-cpu ipv4 mibs
1756 if (init_ipv4_mibs())
1757 pr_crit("%s: Cannot init ipv4 mibs\n", __func__
);
1763 dev_add_pack(&ip_packet_type
);
1768 out_unregister_raw_proto
:
1769 proto_unregister(&raw_prot
);
1770 out_unregister_udp_proto
:
1771 proto_unregister(&udp_prot
);
1772 out_unregister_tcp_proto
:
1773 proto_unregister(&tcp_prot
);
1774 out_free_reserved_ports
:
1775 kfree(sysctl_local_reserved_ports
);
1779 fs_initcall(inet_init
);
1781 /* ------------------------------------------------------------------------ */
1783 #ifdef CONFIG_PROC_FS
1784 static int __init
ipv4_proc_init(void)
1788 if (raw_proc_init())
1790 if (tcp4_proc_init())
1792 if (udp4_proc_init())
1794 if (ping_proc_init())
1796 if (ip_misc_proc_init())
1813 #else /* CONFIG_PROC_FS */
1814 static int __init
ipv4_proc_init(void)
1818 #endif /* CONFIG_PROC_FS */
1820 MODULE_ALIAS_NETPROTO(PF_INET
);