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/inet_common.h>
115 #include <net/xfrm.h>
116 #include <net/net_namespace.h>
117 #include <net/secure_seq.h>
118 #ifdef CONFIG_IP_MROUTE
119 #include <linux/mroute.h>
122 #ifdef CONFIG_ANDROID_PARANOID_NETWORK
123 #include <linux/android_aid.h>
125 static inline int current_has_network(void)
127 return in_egroup_p(AID_INET) || capable(CAP_NET_RAW);
130 static inline int current_has_network(void)
136 /* The inetsw table contains everything that inet_create needs to
137 * build a new socket.
139 static struct list_head inetsw[SOCK_MAX];
140 static DEFINE_SPINLOCK(inetsw_lock);
142 struct ipv4_config ipv4_config;
143 EXPORT_SYMBOL(ipv4_config);
145 /* New destruction routine */
147 void inet_sock_destruct(struct sock *sk)
149 struct inet_sock *inet = inet_sk(sk);
151 __skb_queue_purge(&sk->sk_receive_queue);
152 __skb_queue_purge(&sk->sk_error_queue);
156 if (sk->sk_type == SOCK_STREAM && sk->sk_state != TCP_CLOSE) {
157 pr_err("Attempt to release TCP socket in state %d %p\n",
161 if (!sock_flag(sk, SOCK_DEAD)) {
162 pr_err("Attempt to release alive inet socket %p\n", sk);
166 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
167 WARN_ON(atomic_read(&sk->sk_wmem_alloc));
168 WARN_ON(sk->sk_wmem_queued);
169 WARN_ON(sk->sk_forward_alloc);
171 kfree(rcu_dereference_protected(inet->inet_opt, 1));
172 dst_release(rcu_dereference_check(sk->sk_dst_cache, 1));
173 dst_release(sk->sk_rx_dst);
174 sk_refcnt_debug_dec(sk);
176 EXPORT_SYMBOL(inet_sock_destruct);
179 * The routines beyond this point handle the behaviour of an AF_INET
180 * socket object. Mostly it punts to the subprotocols of IP to do
185 * Automatically bind an unbound socket.
188 static int inet_autobind(struct sock *sk)
190 struct inet_sock *inet;
191 /* We may need to bind the socket. */
194 if (!inet->inet_num) {
195 if (sk->sk_prot->get_port(sk, 0)) {
199 inet->inet_sport = htons(inet->inet_num);
206 * Move a socket into listening state.
208 int inet_listen(struct socket *sock, int backlog)
210 struct sock *sk = sock->sk;
211 unsigned char old_state;
217 if (sock->state != SS_UNCONNECTED || sock->type != SOCK_STREAM)
220 old_state = sk->sk_state;
221 if (!((1 << old_state) & (TCPF_CLOSE | TCPF_LISTEN)))
224 /* Really, if the socket is already in listen state
225 * we can only allow the backlog to be adjusted.
227 if (old_state != TCP_LISTEN) {
228 /* Check special setups for testing purpose to enable TFO w/o
229 * requiring TCP_FASTOPEN sockopt.
230 * Note that only TCP sockets (SOCK_STREAM) will reach here.
231 * Also fastopenq may already been allocated because this
232 * socket was in TCP_LISTEN state previously but was
233 * shutdown() (rather than close()).
235 if ((sysctl_tcp_fastopen & TFO_SERVER_ENABLE) != 0 &&
236 inet_csk(sk)->icsk_accept_queue.fastopenq == NULL) {
237 if ((sysctl_tcp_fastopen & TFO_SERVER_WO_SOCKOPT1) != 0)
238 err = fastopen_init_queue(sk, backlog);
239 else if ((sysctl_tcp_fastopen &
240 TFO_SERVER_WO_SOCKOPT2) != 0)
241 err = fastopen_init_queue(sk,
242 ((uint)sysctl_tcp_fastopen) >> 16);
248 err = inet_csk_listen_start(sk, backlog);
252 sk->sk_max_ack_backlog = backlog;
259 EXPORT_SYMBOL(inet_listen);
261 u32 inet_ehash_secret __read_mostly;
262 EXPORT_SYMBOL(inet_ehash_secret);
264 u32 ipv6_hash_secret __read_mostly;
265 EXPORT_SYMBOL(ipv6_hash_secret);
268 * inet_ehash_secret must be set exactly once, and to a non nul value
269 * ipv6_hash_secret must be set exactly once.
271 void build_ehash_secret(void)
276 get_random_bytes(&rnd, sizeof(rnd));
279 if (cmpxchg(&inet_ehash_secret, 0, rnd) == 0)
280 get_random_bytes(&ipv6_hash_secret, sizeof(ipv6_hash_secret));
282 EXPORT_SYMBOL(build_ehash_secret);
285 * Create an inet socket.
288 static int inet_create(struct net *net, struct socket *sock, int protocol,
292 struct inet_protosw *answer;
293 struct inet_sock *inet;
294 struct proto *answer_prot;
295 unsigned char answer_flags;
296 char answer_no_check;
297 int try_loading_module = 0;
300 if (!current_has_network())
303 if (unlikely(!inet_ehash_secret))
304 if (sock->type != SOCK_RAW && sock->type != SOCK_DGRAM)
305 build_ehash_secret();
307 sock->state = SS_UNCONNECTED;
309 /* Look for the requested type/protocol pair. */
311 err = -ESOCKTNOSUPPORT;
313 list_for_each_entry_rcu(answer, &inetsw[sock->type], list) {
316 /* Check the non-wild match. */
317 if (protocol == answer->protocol) {
318 if (protocol != IPPROTO_IP)
321 /* Check for the two wild cases. */
322 if (IPPROTO_IP == protocol) {
323 protocol = answer->protocol;
326 if (IPPROTO_IP == answer->protocol)
329 err = -EPROTONOSUPPORT;
333 if (try_loading_module < 2) {
336 * Be more specific, e.g. net-pf-2-proto-132-type-1
337 * (net-pf-PF_INET-proto-IPPROTO_SCTP-type-SOCK_STREAM)
339 if (++try_loading_module == 1)
340 request_module("net-pf-%d-proto-%d-type-%d",
341 PF_INET, protocol, sock->type);
343 * Fall back to generic, e.g. net-pf-2-proto-132
344 * (net-pf-PF_INET-proto-IPPROTO_SCTP)
347 request_module("net-pf-%d-proto-%d",
349 goto lookup_protocol;
355 if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW))
358 sock->ops = answer->ops;
359 answer_prot = answer->prot;
360 answer_no_check = answer->no_check;
361 answer_flags = answer->flags;
364 WARN_ON(answer_prot->slab == NULL);
367 sk = sk_alloc(net, PF_INET, GFP_KERNEL, answer_prot);
372 sk->sk_no_check = answer_no_check;
373 if (INET_PROTOSW_REUSE & answer_flags)
374 sk->sk_reuse = SK_CAN_REUSE;
377 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
381 if (SOCK_RAW == sock->type) {
382 inet->inet_num = protocol;
383 if (IPPROTO_RAW == protocol)
387 if (ipv4_config.no_pmtu_disc)
388 inet->pmtudisc = IP_PMTUDISC_DONT;
390 inet->pmtudisc = IP_PMTUDISC_WANT;
394 sock_init_data(sock, sk);
396 sk->sk_destruct = inet_sock_destruct;
397 sk->sk_protocol = protocol;
398 sk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
405 inet->mc_list = NULL;
408 sk_refcnt_debug_inc(sk);
410 if (inet->inet_num) {
411 /* It assumes that any protocol which allows
412 * the user to assign a number at socket
413 * creation time automatically
416 inet->inet_sport = htons(inet->inet_num);
417 /* Add to protocol hash chains. */
418 sk->sk_prot->hash(sk);
421 if (sk->sk_prot->init) {
422 err = sk->sk_prot->init(sk);
424 sk_common_release(sk);
435 * The peer socket should always be NULL (or else). When we call this
436 * function we are destroying the object and from then on nobody
437 * should refer to it.
439 int inet_release(struct socket *sock)
441 struct sock *sk = sock->sk;
446 sock_rps_reset_flow(sk);
448 /* Applications forget to leave groups before exiting */
449 ip_mc_drop_socket(sk);
451 /* If linger is set, we don't return until the close
452 * is complete. Otherwise we return immediately. The
453 * actually closing is done the same either way.
455 * If the close is due to the process exiting, we never
459 if (sock_flag(sk, SOCK_LINGER) &&
460 !(current->flags & PF_EXITING))
461 timeout = sk->sk_lingertime;
463 sk->sk_prot->close(sk, timeout);
467 EXPORT_SYMBOL(inet_release);
469 /* It is off by default, see below. */
470 int sysctl_ip_nonlocal_bind __read_mostly;
471 EXPORT_SYMBOL(sysctl_ip_nonlocal_bind);
473 int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
475 struct sockaddr_in *addr = (struct sockaddr_in *)uaddr;
476 struct sock *sk = sock->sk;
477 struct inet_sock *inet = inet_sk(sk);
478 struct net *net = sock_net(sk);
483 /* If the socket has its own bind function then use it. (RAW) */
484 if (sk->sk_prot->bind) {
485 err = sk->sk_prot->bind(sk, uaddr, addr_len);
489 if (addr_len < sizeof(struct sockaddr_in))
492 if (addr->sin_family != AF_INET) {
493 /* Compatibility games : accept AF_UNSPEC (mapped to AF_INET)
494 * only if s_addr is INADDR_ANY.
497 if (addr->sin_family != AF_UNSPEC ||
498 addr->sin_addr.s_addr != htonl(INADDR_ANY))
502 chk_addr_ret = inet_addr_type(net, addr->sin_addr.s_addr);
504 /* Not specified by any standard per-se, however it breaks too
505 * many applications when removed. It is unfortunate since
506 * allowing applications to make a non-local bind solves
507 * several problems with systems using dynamic addressing.
508 * (ie. your servers still start up even if your ISDN link
509 * is temporarily down)
511 err = -EADDRNOTAVAIL;
512 if (!sysctl_ip_nonlocal_bind &&
513 !(inet->freebind || inet->transparent) &&
514 addr->sin_addr.s_addr != htonl(INADDR_ANY) &&
515 chk_addr_ret != RTN_LOCAL &&
516 chk_addr_ret != RTN_MULTICAST &&
517 chk_addr_ret != RTN_BROADCAST)
520 snum = ntohs(addr->sin_port);
522 if (snum && snum < PROT_SOCK &&
523 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
526 /* We keep a pair of addresses. rcv_saddr is the one
527 * used by hash lookups, and saddr is used for transmit.
529 * In the BSD API these are the same except where it
530 * would be illegal to use them (multicast/broadcast) in
531 * which case the sending device address is used.
535 /* Check these errors (active socket, double bind). */
537 if (sk->sk_state != TCP_CLOSE || inet->inet_num)
538 goto out_release_sock;
540 inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr;
541 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
542 inet->inet_saddr = 0; /* Use device */
544 /* Make sure we are allowed to bind here. */
545 if (sk->sk_prot->get_port(sk, snum)) {
546 inet->inet_saddr = inet->inet_rcv_saddr = 0;
548 goto out_release_sock;
551 if (inet->inet_rcv_saddr)
552 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
554 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
555 inet->inet_sport = htons(inet->inet_num);
556 inet->inet_daddr = 0;
557 inet->inet_dport = 0;
565 EXPORT_SYMBOL(inet_bind);
567 int inet_dgram_connect(struct socket *sock, struct sockaddr *uaddr,
568 int addr_len, int flags)
570 struct sock *sk = sock->sk;
572 if (addr_len < sizeof(uaddr->sa_family))
574 if (uaddr->sa_family == AF_UNSPEC)
575 return sk->sk_prot->disconnect(sk, flags);
577 if (!inet_sk(sk)->inet_num && inet_autobind(sk))
579 return sk->sk_prot->connect(sk, uaddr, addr_len);
581 EXPORT_SYMBOL(inet_dgram_connect);
583 static long inet_wait_for_connect(struct sock *sk, long timeo, int writebias)
587 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
588 sk->sk_write_pending += writebias;
590 /* Basic assumption: if someone sets sk->sk_err, he _must_
591 * change state of the socket from TCP_SYN_*.
592 * Connect() does not allow to get error notifications
593 * without closing the socket.
595 while ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) {
597 timeo = schedule_timeout(timeo);
599 if (signal_pending(current) || !timeo)
601 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
603 finish_wait(sk_sleep(sk), &wait);
604 sk->sk_write_pending -= writebias;
609 * Connect to a remote host. There is regrettably still a little
610 * TCP 'magic' in here.
612 int __inet_stream_connect(struct socket *sock, struct sockaddr *uaddr,
613 int addr_len, int flags)
615 struct sock *sk = sock->sk;
619 if (addr_len < sizeof(uaddr->sa_family))
622 if (uaddr->sa_family == AF_UNSPEC) {
623 err = sk->sk_prot->disconnect(sk, flags);
624 sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED;
628 switch (sock->state) {
637 /* Fall out of switch with err, set for this state */
641 if (sk->sk_state != TCP_CLOSE)
644 err = sk->sk_prot->connect(sk, uaddr, addr_len);
648 sock->state = SS_CONNECTING;
650 /* Just entered SS_CONNECTING state; the only
651 * difference is that return value in non-blocking
652 * case is EINPROGRESS, rather than EALREADY.
658 timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
660 if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) {
661 int writebias = (sk->sk_protocol == IPPROTO_TCP) &&
662 tcp_sk(sk)->fastopen_req &&
663 tcp_sk(sk)->fastopen_req->data ? 1 : 0;
665 /* Error code is set above */
666 if (!timeo || !inet_wait_for_connect(sk, timeo, writebias))
669 err = sock_intr_errno(timeo);
670 if (signal_pending(current))
674 /* Connection was closed by RST, timeout, ICMP error
675 * or another process disconnected us.
677 if (sk->sk_state == TCP_CLOSE)
680 /* sk->sk_err may be not zero now, if RECVERR was ordered by user
681 * and error was received after socket entered established state.
682 * Hence, it is handled normally after connect() return successfully.
685 sock->state = SS_CONNECTED;
691 err = sock_error(sk) ? : -ECONNABORTED;
692 sock->state = SS_UNCONNECTED;
693 if (sk->sk_prot->disconnect(sk, flags))
694 sock->state = SS_DISCONNECTING;
697 EXPORT_SYMBOL(__inet_stream_connect);
699 int inet_stream_connect(struct socket *sock, struct sockaddr *uaddr,
700 int addr_len, int flags)
705 err = __inet_stream_connect(sock, uaddr, addr_len, flags);
706 release_sock(sock->sk);
709 EXPORT_SYMBOL(inet_stream_connect);
712 * Accept a pending connection. The TCP layer now gives BSD semantics.
715 int inet_accept(struct socket *sock, struct socket *newsock, int flags)
717 struct sock *sk1 = sock->sk;
719 struct sock *sk2 = sk1->sk_prot->accept(sk1, flags, &err);
726 sock_rps_record_flow(sk2);
727 WARN_ON(!((1 << sk2->sk_state) &
728 (TCPF_ESTABLISHED | TCPF_SYN_RECV |
729 TCPF_CLOSE_WAIT | TCPF_CLOSE)));
731 sock_graft(sk2, newsock);
733 newsock->state = SS_CONNECTED;
739 EXPORT_SYMBOL(inet_accept);
743 * This does both peername and sockname.
745 int inet_getname(struct socket *sock, struct sockaddr *uaddr,
746 int *uaddr_len, int peer)
748 struct sock *sk = sock->sk;
749 struct inet_sock *inet = inet_sk(sk);
750 DECLARE_SOCKADDR(struct sockaddr_in *, sin, uaddr);
752 sin->sin_family = AF_INET;
754 if (!inet->inet_dport ||
755 (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
758 sin->sin_port = inet->inet_dport;
759 sin->sin_addr.s_addr = inet->inet_daddr;
761 __be32 addr = inet->inet_rcv_saddr;
763 addr = inet->inet_saddr;
764 sin->sin_port = inet->inet_sport;
765 sin->sin_addr.s_addr = addr;
767 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
768 *uaddr_len = sizeof(*sin);
771 EXPORT_SYMBOL(inet_getname);
773 int inet_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
776 struct sock *sk = sock->sk;
778 sock_rps_record_flow(sk);
780 /* We may need to bind the socket. */
781 if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind &&
785 return sk->sk_prot->sendmsg(iocb, sk, msg, size);
787 EXPORT_SYMBOL(inet_sendmsg);
789 ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset,
790 size_t size, int flags)
792 struct sock *sk = sock->sk;
794 sock_rps_record_flow(sk);
796 /* We may need to bind the socket. */
797 if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind &&
801 if (sk->sk_prot->sendpage)
802 return sk->sk_prot->sendpage(sk, page, offset, size, flags);
803 return sock_no_sendpage(sock, page, offset, size, flags);
805 EXPORT_SYMBOL(inet_sendpage);
807 int inet_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
808 size_t size, int flags)
810 struct sock *sk = sock->sk;
814 sock_rps_record_flow(sk);
816 err = sk->sk_prot->recvmsg(iocb, sk, msg, size, flags & MSG_DONTWAIT,
817 flags & ~MSG_DONTWAIT, &addr_len);
819 msg->msg_namelen = addr_len;
822 EXPORT_SYMBOL(inet_recvmsg);
824 int inet_shutdown(struct socket *sock, int how)
826 struct sock *sk = sock->sk;
829 /* This should really check to make sure
830 * the socket is a TCP socket. (WHY AC...)
832 how++; /* maps 0->1 has the advantage of making bit 1 rcvs and
835 if ((how & ~SHUTDOWN_MASK) || !how) /* MAXINT->0 */
839 if (sock->state == SS_CONNECTING) {
840 if ((1 << sk->sk_state) &
841 (TCPF_SYN_SENT | TCPF_SYN_RECV | TCPF_CLOSE))
842 sock->state = SS_DISCONNECTING;
844 sock->state = SS_CONNECTED;
847 switch (sk->sk_state) {
850 /* Hack to wake up other listeners, who can poll for
851 POLLHUP, even on eg. unconnected UDP sockets -- RR */
853 sk->sk_shutdown |= how;
854 if (sk->sk_prot->shutdown)
855 sk->sk_prot->shutdown(sk, how);
858 /* Remaining two branches are temporary solution for missing
859 * close() in multithreaded environment. It is _not_ a good idea,
860 * but we have no choice until close() is repaired at VFS level.
863 if (!(how & RCV_SHUTDOWN))
867 err = sk->sk_prot->disconnect(sk, O_NONBLOCK);
868 sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED;
872 /* Wake up anyone sleeping in poll. */
873 sk->sk_state_change(sk);
877 EXPORT_SYMBOL(inet_shutdown);
880 * ioctl() calls you can issue on an INET socket. Most of these are
881 * device configuration and stuff and very rarely used. Some ioctls
882 * pass on to the socket itself.
884 * NOTE: I like the idea of a module for the config stuff. ie ifconfig
885 * loads the devconfigure module does its configuring and unloads it.
886 * There's a good 20K of config code hanging around the kernel.
889 int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
891 struct sock *sk = sock->sk;
893 struct net *net = sock_net(sk);
897 err = sock_get_timestamp(sk, (struct timeval __user *)arg);
900 err = sock_get_timestampns(sk, (struct timespec __user *)arg);
905 err = ip_rt_ioctl(net, cmd, (void __user *)arg);
910 err = arp_ioctl(net, cmd, (void __user *)arg);
924 err = devinet_ioctl(net, cmd, (void __user *)arg);
927 if (sk->sk_prot->ioctl)
928 err = sk->sk_prot->ioctl(sk, cmd, arg);
935 EXPORT_SYMBOL(inet_ioctl);
938 static int inet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
940 struct sock *sk = sock->sk;
941 int err = -ENOIOCTLCMD;
943 if (sk->sk_prot->compat_ioctl)
944 err = sk->sk_prot->compat_ioctl(sk, cmd, arg);
950 const struct proto_ops inet_stream_ops = {
952 .owner = THIS_MODULE,
953 .release = inet_release,
955 .connect = inet_stream_connect,
956 .socketpair = sock_no_socketpair,
957 .accept = inet_accept,
958 .getname = inet_getname,
961 .listen = inet_listen,
962 .shutdown = inet_shutdown,
963 .setsockopt = sock_common_setsockopt,
964 .getsockopt = sock_common_getsockopt,
965 .sendmsg = inet_sendmsg,
966 .recvmsg = inet_recvmsg,
967 .mmap = sock_no_mmap,
968 .sendpage = inet_sendpage,
969 .splice_read = tcp_splice_read,
971 .compat_setsockopt = compat_sock_common_setsockopt,
972 .compat_getsockopt = compat_sock_common_getsockopt,
973 .compat_ioctl = inet_compat_ioctl,
976 EXPORT_SYMBOL(inet_stream_ops);
978 const struct proto_ops inet_dgram_ops = {
980 .owner = THIS_MODULE,
981 .release = inet_release,
983 .connect = inet_dgram_connect,
984 .socketpair = sock_no_socketpair,
985 .accept = sock_no_accept,
986 .getname = inet_getname,
989 .listen = sock_no_listen,
990 .shutdown = inet_shutdown,
991 .setsockopt = sock_common_setsockopt,
992 .getsockopt = sock_common_getsockopt,
993 .sendmsg = inet_sendmsg,
994 .recvmsg = inet_recvmsg,
995 .mmap = sock_no_mmap,
996 .sendpage = inet_sendpage,
998 .compat_setsockopt = compat_sock_common_setsockopt,
999 .compat_getsockopt = compat_sock_common_getsockopt,
1000 .compat_ioctl = inet_compat_ioctl,
1003 EXPORT_SYMBOL(inet_dgram_ops);
1006 * For SOCK_RAW sockets; should be the same as inet_dgram_ops but without
1009 static const struct proto_ops inet_sockraw_ops = {
1011 .owner = THIS_MODULE,
1012 .release = inet_release,
1014 .connect = inet_dgram_connect,
1015 .socketpair = sock_no_socketpair,
1016 .accept = sock_no_accept,
1017 .getname = inet_getname,
1018 .poll = datagram_poll,
1019 .ioctl = inet_ioctl,
1020 .listen = sock_no_listen,
1021 .shutdown = inet_shutdown,
1022 .setsockopt = sock_common_setsockopt,
1023 .getsockopt = sock_common_getsockopt,
1024 .sendmsg = inet_sendmsg,
1025 .recvmsg = inet_recvmsg,
1026 .mmap = sock_no_mmap,
1027 .sendpage = inet_sendpage,
1028 #ifdef CONFIG_COMPAT
1029 .compat_setsockopt = compat_sock_common_setsockopt,
1030 .compat_getsockopt = compat_sock_common_getsockopt,
1031 .compat_ioctl = inet_compat_ioctl,
1035 static const struct net_proto_family inet_family_ops = {
1037 .create = inet_create,
1038 .owner = THIS_MODULE,
1041 /* Upon startup we insert all the elements in inetsw_array[] into
1042 * the linked list inetsw.
1044 static struct inet_protosw inetsw_array[] =
1047 .type = SOCK_STREAM,
1048 .protocol = IPPROTO_TCP,
1050 .ops = &inet_stream_ops,
1052 .flags = INET_PROTOSW_PERMANENT |
1058 .protocol = IPPROTO_UDP,
1060 .ops = &inet_dgram_ops,
1061 .no_check = UDP_CSUM_DEFAULT,
1062 .flags = INET_PROTOSW_PERMANENT,
1067 .protocol = IPPROTO_ICMP,
1069 .ops = &inet_dgram_ops,
1070 .no_check = UDP_CSUM_DEFAULT,
1071 .flags = INET_PROTOSW_REUSE,
1076 .protocol = IPPROTO_IP, /* wild card */
1078 .ops = &inet_sockraw_ops,
1079 .no_check = UDP_CSUM_DEFAULT,
1080 .flags = INET_PROTOSW_REUSE,
1084 #define INETSW_ARRAY_LEN ARRAY_SIZE(inetsw_array)
1086 void inet_register_protosw(struct inet_protosw *p)
1088 struct list_head *lh;
1089 struct inet_protosw *answer;
1090 int protocol = p->protocol;
1091 struct list_head *last_perm;
1093 spin_lock_bh(&inetsw_lock);
1095 if (p->type >= SOCK_MAX)
1098 /* If we are trying to override a permanent protocol, bail. */
1100 last_perm = &inetsw[p->type];
1101 list_for_each(lh, &inetsw[p->type]) {
1102 answer = list_entry(lh, struct inet_protosw, list);
1104 /* Check only the non-wild match. */
1105 if (INET_PROTOSW_PERMANENT & answer->flags) {
1106 if (protocol == answer->protocol)
1116 /* Add the new entry after the last permanent entry if any, so that
1117 * the new entry does not override a permanent entry when matched with
1118 * a wild-card protocol. But it is allowed to override any existing
1119 * non-permanent entry. This means that when we remove this entry, the
1120 * system automatically returns to the old behavior.
1122 list_add_rcu(&p->list, last_perm);
1124 spin_unlock_bh(&inetsw_lock);
1129 pr_err("Attempt to override permanent protocol %d\n", protocol);
1133 pr_err("Ignoring attempt to register invalid socket type %d\n",
1137 EXPORT_SYMBOL(inet_register_protosw);
1139 void inet_unregister_protosw(struct inet_protosw *p)
1141 if (INET_PROTOSW_PERMANENT & p->flags) {
1142 pr_err("Attempt to unregister permanent protocol %d\n",
1145 spin_lock_bh(&inetsw_lock);
1146 list_del_rcu(&p->list);
1147 spin_unlock_bh(&inetsw_lock);
1152 EXPORT_SYMBOL(inet_unregister_protosw);
1155 * Shall we try to damage output packets if routing dev changes?
1158 int sysctl_ip_dynaddr __read_mostly;
1160 static int inet_sk_reselect_saddr(struct sock *sk)
1162 struct inet_sock *inet = inet_sk(sk);
1163 __be32 old_saddr = inet->inet_saddr;
1164 __be32 daddr = inet->inet_daddr;
1168 struct ip_options_rcu *inet_opt;
1170 inet_opt = rcu_dereference_protected(inet->inet_opt,
1171 sock_owned_by_user(sk));
1172 if (inet_opt && inet_opt->opt.srr)
1173 daddr = inet_opt->opt.faddr;
1175 /* Query new route. */
1176 fl4 = &inet->cork.fl.u.ip4;
1177 rt = ip_route_connect(fl4, daddr, 0, RT_CONN_FLAGS(sk),
1178 sk->sk_bound_dev_if, sk->sk_protocol,
1179 inet->inet_sport, inet->inet_dport, sk, false);
1183 sk_setup_caps(sk, &rt->dst);
1185 new_saddr = fl4->saddr;
1187 if (new_saddr == old_saddr)
1190 if (sysctl_ip_dynaddr > 1) {
1191 pr_info("%s(): shifting inet->saddr from %pI4 to %pI4\n",
1192 __func__, &old_saddr, &new_saddr);
1195 inet->inet_saddr = inet->inet_rcv_saddr = new_saddr;
1198 * XXX The only one ugly spot where we need to
1199 * XXX really change the sockets identity after
1200 * XXX it has entered the hashes. -DaveM
1202 * Besides that, it does not check for connection
1203 * uniqueness. Wait for troubles.
1205 __sk_prot_rehash(sk);
1209 int inet_sk_rebuild_header(struct sock *sk)
1211 struct inet_sock *inet = inet_sk(sk);
1212 struct rtable *rt = (struct rtable *)__sk_dst_check(sk, 0);
1214 struct ip_options_rcu *inet_opt;
1218 /* Route is OK, nothing to do. */
1224 inet_opt = rcu_dereference(inet->inet_opt);
1225 daddr = inet->inet_daddr;
1226 if (inet_opt && inet_opt->opt.srr)
1227 daddr = inet_opt->opt.faddr;
1229 fl4 = &inet->cork.fl.u.ip4;
1230 rt = ip_route_output_ports(sock_net(sk), fl4, sk, daddr, inet->inet_saddr,
1231 inet->inet_dport, inet->inet_sport,
1232 sk->sk_protocol, RT_CONN_FLAGS(sk),
1233 sk->sk_bound_dev_if);
1236 sk_setup_caps(sk, &rt->dst);
1240 /* Routing failed... */
1241 sk->sk_route_caps = 0;
1243 * Other protocols have to map its equivalent state to TCP_SYN_SENT.
1244 * DCCP maps its DCCP_REQUESTING state to TCP_SYN_SENT. -acme
1246 if (!sysctl_ip_dynaddr ||
1247 sk->sk_state != TCP_SYN_SENT ||
1248 (sk->sk_userlocks & SOCK_BINDADDR_LOCK) ||
1249 (err = inet_sk_reselect_saddr(sk)) != 0)
1250 sk->sk_err_soft = -err;
1255 EXPORT_SYMBOL(inet_sk_rebuild_header);
1257 static int inet_gso_send_check(struct sk_buff *skb)
1259 const struct net_offload *ops;
1260 const struct iphdr *iph;
1265 if (unlikely(!pskb_may_pull(skb, sizeof(*iph))))
1270 if (ihl < sizeof(*iph))
1273 if (unlikely(!pskb_may_pull(skb, ihl)))
1276 __skb_pull(skb, ihl);
1277 skb_reset_transport_header(skb);
1279 proto = iph->protocol;
1280 err = -EPROTONOSUPPORT;
1283 ops = rcu_dereference(inet_offloads[proto]);
1284 if (likely(ops && ops->callbacks.gso_send_check))
1285 err = ops->callbacks.gso_send_check(skb);
1292 static struct sk_buff *inet_gso_segment(struct sk_buff *skb,
1293 netdev_features_t features)
1295 struct sk_buff *segs = ERR_PTR(-EINVAL);
1296 const struct net_offload *ops;
1301 unsigned int offset = 0;
1304 if (unlikely(skb_shinfo(skb)->gso_type &
1311 SKB_GSO_UDP_TUNNEL |
1315 if (unlikely(!pskb_may_pull(skb, sizeof(*iph))))
1320 if (ihl < sizeof(*iph))
1323 if (unlikely(!pskb_may_pull(skb, ihl)))
1326 tunnel = !!skb->encapsulation;
1328 __skb_pull(skb, ihl);
1329 skb_reset_transport_header(skb);
1331 id = ntohs(iph->id);
1332 proto = iph->protocol;
1333 segs = ERR_PTR(-EPROTONOSUPPORT);
1336 ops = rcu_dereference(inet_offloads[proto]);
1337 if (likely(ops && ops->callbacks.gso_segment))
1338 segs = ops->callbacks.gso_segment(skb, features);
1341 if (IS_ERR_OR_NULL(segs))
1347 if (!tunnel && proto == IPPROTO_UDP) {
1348 iph->id = htons(id);
1349 iph->frag_off = htons(offset >> 3);
1350 if (skb->next != NULL)
1351 iph->frag_off |= htons(IP_MF);
1352 offset += (skb->len - skb->mac_len - iph->ihl * 4);
1354 iph->id = htons(id++);
1356 iph->tot_len = htons(skb->len - skb->mac_len);
1358 iph->check = ip_fast_csum(skb_network_header(skb), iph->ihl);
1359 } while ((skb = skb->next));
1365 static struct sk_buff **inet_gro_receive(struct sk_buff **head,
1366 struct sk_buff *skb)
1368 const struct net_offload *ops;
1369 struct sk_buff **pp = NULL;
1371 const struct iphdr *iph;
1378 off = skb_gro_offset(skb);
1379 hlen = off + sizeof(*iph);
1380 iph = skb_gro_header_fast(skb, off);
1381 if (skb_gro_header_hard(skb, hlen)) {
1382 iph = skb_gro_header_slow(skb, hlen, off);
1387 proto = iph->protocol;
1390 ops = rcu_dereference(inet_offloads[proto]);
1391 if (!ops || !ops->callbacks.gro_receive)
1394 if (*(u8 *)iph != 0x45)
1397 if (unlikely(ip_fast_csum((u8 *)iph, 5)))
1400 id = ntohl(*(__be32 *)&iph->id);
1401 flush = (u16)((ntohl(*(__be32 *)iph) ^ skb_gro_len(skb)) | (id ^ IP_DF));
1404 for (p = *head; p; p = p->next) {
1407 if (!NAPI_GRO_CB(p)->same_flow)
1412 if ((iph->protocol ^ iph2->protocol) |
1413 ((__force u32)iph->saddr ^ (__force u32)iph2->saddr) |
1414 ((__force u32)iph->daddr ^ (__force u32)iph2->daddr)) {
1415 NAPI_GRO_CB(p)->same_flow = 0;
1419 /* All fields must match except length and checksum. */
1420 NAPI_GRO_CB(p)->flush |=
1421 (iph->ttl ^ iph2->ttl) |
1422 (iph->tos ^ iph2->tos) |
1423 ((u16)(ntohs(iph2->id) + NAPI_GRO_CB(p)->count) ^ id);
1425 NAPI_GRO_CB(p)->flush |= flush;
1428 NAPI_GRO_CB(skb)->flush |= flush;
1429 skb_gro_pull(skb, sizeof(*iph));
1430 skb_set_transport_header(skb, skb_gro_offset(skb));
1432 pp = ops->callbacks.gro_receive(head, skb);
1438 NAPI_GRO_CB(skb)->flush |= flush;
1443 static int inet_gro_complete(struct sk_buff *skb)
1445 __be16 newlen = htons(skb->len - skb_network_offset(skb));
1446 struct iphdr *iph = ip_hdr(skb);
1447 const struct net_offload *ops;
1448 int proto = iph->protocol;
1451 csum_replace2(&iph->check, iph->tot_len, newlen);
1452 iph->tot_len = newlen;
1455 ops = rcu_dereference(inet_offloads[proto]);
1456 if (WARN_ON(!ops || !ops->callbacks.gro_complete))
1459 err = ops->callbacks.gro_complete(skb);
1467 int inet_ctl_sock_create(struct sock **sk, unsigned short family,
1468 unsigned short type, unsigned char protocol,
1471 struct socket *sock;
1472 int rc = sock_create_kern(family, type, protocol, &sock);
1476 (*sk)->sk_allocation = GFP_ATOMIC;
1478 * Unhash it so that IP input processing does not even see it,
1479 * we do not wish this socket to see incoming packets.
1481 (*sk)->sk_prot->unhash(*sk);
1483 sk_change_net(*sk, net);
1487 EXPORT_SYMBOL_GPL(inet_ctl_sock_create);
1489 unsigned long snmp_fold_field(void __percpu *mib[], int offt)
1491 unsigned long res = 0;
1494 for_each_possible_cpu(i) {
1495 for (j = 0; j < SNMP_ARRAY_SZ; j++)
1496 res += *(((unsigned long *) per_cpu_ptr(mib[j], i)) + offt);
1500 EXPORT_SYMBOL_GPL(snmp_fold_field);
1502 #if BITS_PER_LONG==32
1504 u64 snmp_fold_field64(void __percpu *mib[], int offt, size_t syncp_offset)
1509 for_each_possible_cpu(cpu) {
1511 struct u64_stats_sync *syncp;
1515 bhptr = per_cpu_ptr(mib[0], cpu);
1516 syncp = (struct u64_stats_sync *)(bhptr + syncp_offset);
1518 start = u64_stats_fetch_begin_bh(syncp);
1519 v = *(((u64 *) bhptr) + offt);
1520 } while (u64_stats_fetch_retry_bh(syncp, start));
1526 EXPORT_SYMBOL_GPL(snmp_fold_field64);
1529 int snmp_mib_init(void __percpu *ptr[2], size_t mibsize, size_t align)
1531 BUG_ON(ptr == NULL);
1532 ptr[0] = __alloc_percpu(mibsize, align);
1535 #if SNMP_ARRAY_SZ == 2
1536 ptr[1] = __alloc_percpu(mibsize, align);
1538 free_percpu(ptr[0]);
1545 EXPORT_SYMBOL_GPL(snmp_mib_init);
1547 void snmp_mib_free(void __percpu *ptr[SNMP_ARRAY_SZ])
1551 BUG_ON(ptr == NULL);
1552 for (i = 0; i < SNMP_ARRAY_SZ; i++) {
1553 free_percpu(ptr[i]);
1557 EXPORT_SYMBOL_GPL(snmp_mib_free);
1559 #ifdef CONFIG_IP_MULTICAST
1560 static const struct net_protocol igmp_protocol = {
1561 .handler = igmp_rcv,
1566 static const struct net_protocol tcp_protocol = {
1567 .early_demux = tcp_v4_early_demux,
1568 .handler = tcp_v4_rcv,
1569 .err_handler = tcp_v4_err,
1574 static const struct net_offload tcp_offload = {
1576 .gso_send_check = tcp_v4_gso_send_check,
1577 .gso_segment = tcp_tso_segment,
1578 .gro_receive = tcp4_gro_receive,
1579 .gro_complete = tcp4_gro_complete,
1583 static const struct net_protocol udp_protocol = {
1585 .err_handler = udp_err,
1590 static const struct net_offload udp_offload = {
1592 .gso_send_check = udp4_ufo_send_check,
1593 .gso_segment = udp4_ufo_fragment,
1597 static const struct net_protocol icmp_protocol = {
1598 .handler = icmp_rcv,
1599 .err_handler = icmp_err,
1604 static __net_init int ipv4_mib_init_net(struct net *net)
1606 if (snmp_mib_init((void __percpu **)net->mib.tcp_statistics,
1607 sizeof(struct tcp_mib),
1608 __alignof__(struct tcp_mib)) < 0)
1610 if (snmp_mib_init((void __percpu **)net->mib.ip_statistics,
1611 sizeof(struct ipstats_mib),
1612 __alignof__(struct ipstats_mib)) < 0)
1614 if (snmp_mib_init((void __percpu **)net->mib.net_statistics,
1615 sizeof(struct linux_mib),
1616 __alignof__(struct linux_mib)) < 0)
1618 if (snmp_mib_init((void __percpu **)net->mib.udp_statistics,
1619 sizeof(struct udp_mib),
1620 __alignof__(struct udp_mib)) < 0)
1622 if (snmp_mib_init((void __percpu **)net->mib.udplite_statistics,
1623 sizeof(struct udp_mib),
1624 __alignof__(struct udp_mib)) < 0)
1625 goto err_udplite_mib;
1626 if (snmp_mib_init((void __percpu **)net->mib.icmp_statistics,
1627 sizeof(struct icmp_mib),
1628 __alignof__(struct icmp_mib)) < 0)
1630 net->mib.icmpmsg_statistics = kzalloc(sizeof(struct icmpmsg_mib),
1632 if (!net->mib.icmpmsg_statistics)
1633 goto err_icmpmsg_mib;
1639 snmp_mib_free((void __percpu **)net->mib.icmp_statistics);
1641 snmp_mib_free((void __percpu **)net->mib.udplite_statistics);
1643 snmp_mib_free((void __percpu **)net->mib.udp_statistics);
1645 snmp_mib_free((void __percpu **)net->mib.net_statistics);
1647 snmp_mib_free((void __percpu **)net->mib.ip_statistics);
1649 snmp_mib_free((void __percpu **)net->mib.tcp_statistics);
1654 static __net_exit void ipv4_mib_exit_net(struct net *net)
1656 kfree(net->mib.icmpmsg_statistics);
1657 snmp_mib_free((void __percpu **)net->mib.icmp_statistics);
1658 snmp_mib_free((void __percpu **)net->mib.udplite_statistics);
1659 snmp_mib_free((void __percpu **)net->mib.udp_statistics);
1660 snmp_mib_free((void __percpu **)net->mib.net_statistics);
1661 snmp_mib_free((void __percpu **)net->mib.ip_statistics);
1662 snmp_mib_free((void __percpu **)net->mib.tcp_statistics);
1665 static __net_initdata struct pernet_operations ipv4_mib_ops = {
1666 .init = ipv4_mib_init_net,
1667 .exit = ipv4_mib_exit_net,
1670 static int __init init_ipv4_mibs(void)
1672 return register_pernet_subsys(&ipv4_mib_ops);
1675 static int ipv4_proc_init(void);
1678 * IP protocol layer initialiser
1681 static struct packet_offload ip_packet_offload __read_mostly = {
1682 .type = cpu_to_be16(ETH_P_IP),
1684 .gso_send_check = inet_gso_send_check,
1685 .gso_segment = inet_gso_segment,
1686 .gro_receive = inet_gro_receive,
1687 .gro_complete = inet_gro_complete,
1691 static int __init ipv4_offload_init(void)
1696 if (inet_add_offload(&udp_offload, IPPROTO_UDP) < 0)
1697 pr_crit("%s: Cannot add UDP protocol offload\n", __func__);
1698 if (inet_add_offload(&tcp_offload, IPPROTO_TCP) < 0)
1699 pr_crit("%s: Cannot add TCP protocol offlaod\n", __func__);
1701 dev_add_offload(&ip_packet_offload);
1705 fs_initcall(ipv4_offload_init);
1707 static struct packet_type ip_packet_type __read_mostly = {
1708 .type = cpu_to_be16(ETH_P_IP),
1712 static int __init inet_init(void)
1714 struct inet_protosw *q;
1715 struct list_head *r;
1718 BUILD_BUG_ON(sizeof(struct inet_skb_parm) > FIELD_SIZEOF(struct sk_buff, cb));
1720 sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL);
1721 if (!sysctl_local_reserved_ports)
1724 rc = proto_register(&tcp_prot, 1);
1726 goto out_free_reserved_ports;
1728 rc = proto_register(&udp_prot, 1);
1730 goto out_unregister_tcp_proto;
1732 rc = proto_register(&raw_prot, 1);
1734 goto out_unregister_udp_proto;
1736 rc = proto_register(&ping_prot, 1);
1738 goto out_unregister_raw_proto;
1741 * Tell SOCKET that we are alive...
1744 (void)sock_register(&inet_family_ops);
1746 #ifdef CONFIG_SYSCTL
1747 ip_static_sysctl_init();
1750 tcp_prot.sysctl_mem = init_net.ipv4.sysctl_tcp_mem;
1753 * Add all the base protocols.
1756 if (inet_add_protocol(&icmp_protocol, IPPROTO_ICMP) < 0)
1757 pr_crit("%s: Cannot add ICMP protocol\n", __func__);
1758 if (inet_add_protocol(&udp_protocol, IPPROTO_UDP) < 0)
1759 pr_crit("%s: Cannot add UDP protocol\n", __func__);
1760 if (inet_add_protocol(&tcp_protocol, IPPROTO_TCP) < 0)
1761 pr_crit("%s: Cannot add TCP protocol\n", __func__);
1762 #ifdef CONFIG_IP_MULTICAST
1763 if (inet_add_protocol(&igmp_protocol, IPPROTO_IGMP) < 0)
1764 pr_crit("%s: Cannot add IGMP protocol\n", __func__);
1767 /* Register the socket-side information for inet_create. */
1768 for (r = &inetsw[0]; r < &inetsw[SOCK_MAX]; ++r)
1771 for (q = inetsw_array; q < &inetsw_array[INETSW_ARRAY_LEN]; ++q)
1772 inet_register_protosw(q);
1775 * Set the ARP module up
1781 * Set the IP module up
1788 /* Setup TCP slab cache for open requests. */
1791 /* Setup UDP memory threshold */
1794 /* Add UDP-Lite (RFC 3828) */
1795 udplite4_register();
1800 * Set the ICMP layer up
1803 if (icmp_init() < 0)
1804 panic("Failed to create the ICMP control socket.\n");
1807 * Initialise the multicast router
1809 #if defined(CONFIG_IP_MROUTE)
1811 pr_crit("%s: Cannot init ipv4 mroute\n", __func__);
1814 * Initialise per-cpu ipv4 mibs
1817 if (init_ipv4_mibs())
1818 pr_crit("%s: Cannot init ipv4 mibs\n", __func__);
1824 dev_add_pack(&ip_packet_type);
1829 out_unregister_raw_proto:
1830 proto_unregister(&raw_prot);
1831 out_unregister_udp_proto:
1832 proto_unregister(&udp_prot);
1833 out_unregister_tcp_proto:
1834 proto_unregister(&tcp_prot);
1835 out_free_reserved_ports:
1836 kfree(sysctl_local_reserved_ports);
1840 fs_initcall(inet_init);
1842 /* ------------------------------------------------------------------------ */
1844 #ifdef CONFIG_PROC_FS
1845 static int __init ipv4_proc_init(void)
1849 if (raw_proc_init())
1851 if (tcp4_proc_init())
1853 if (udp4_proc_init())
1855 if (ping_proc_init())
1857 if (ip_misc_proc_init())
1874 #else /* CONFIG_PROC_FS */
1875 static int __init ipv4_proc_init(void)
1879 #endif /* CONFIG_PROC_FS */
1881 MODULE_ALIAS_NETPROTO(PF_INET);