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/ip_tunnels.h>
116 #include <net/xfrm.h>
117 #include <net/net_namespace.h>
118 #include <net/secure_seq.h>
119 #ifdef CONFIG_IP_MROUTE
120 #include <linux/mroute.h>
125 /* The inetsw table contains everything that inet_create needs to
126 * build a new socket.
128 static struct list_head inetsw[SOCK_MAX];
129 static DEFINE_SPINLOCK(inetsw_lock);
131 /* New destruction routine */
133 void inet_sock_destruct(struct sock *sk)
135 struct inet_sock *inet = inet_sk(sk);
137 __skb_queue_purge(&sk->sk_receive_queue);
138 __skb_queue_purge(&sk->sk_error_queue);
142 if (sk->sk_type == SOCK_STREAM && sk->sk_state != TCP_CLOSE) {
143 pr_err("Attempt to release TCP socket in state %d %p\n",
147 if (!sock_flag(sk, SOCK_DEAD)) {
148 pr_err("Attempt to release alive inet socket %p\n", sk);
152 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
153 WARN_ON(atomic_read(&sk->sk_wmem_alloc));
154 WARN_ON(sk->sk_wmem_queued);
155 WARN_ON(sk->sk_forward_alloc);
157 kfree(rcu_dereference_protected(inet->inet_opt, 1));
158 dst_release(rcu_dereference_check(sk->sk_dst_cache, 1));
159 dst_release(sk->sk_rx_dst);
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 /* Check special setups for testing purpose to enable TFO w/o
215 * requiring TCP_FASTOPEN sockopt.
216 * Note that only TCP sockets (SOCK_STREAM) will reach here.
217 * Also fastopenq may already been allocated because this
218 * socket was in TCP_LISTEN state previously but was
219 * shutdown() (rather than close()).
221 if ((sysctl_tcp_fastopen & TFO_SERVER_ENABLE) != 0 &&
222 !inet_csk(sk)->icsk_accept_queue.fastopenq) {
223 if ((sysctl_tcp_fastopen & TFO_SERVER_WO_SOCKOPT1) != 0)
224 err = fastopen_init_queue(sk, backlog);
225 else if ((sysctl_tcp_fastopen &
226 TFO_SERVER_WO_SOCKOPT2) != 0)
227 err = fastopen_init_queue(sk,
228 ((uint)sysctl_tcp_fastopen) >> 16);
234 tcp_fastopen_init_key_once(true);
236 err = inet_csk_listen_start(sk, backlog);
240 sk->sk_max_ack_backlog = backlog;
247 EXPORT_SYMBOL(inet_listen);
250 * Create an inet socket.
253 static int inet_create(struct net *net, struct socket *sock, int protocol,
257 struct inet_protosw *answer;
258 struct inet_sock *inet;
259 struct proto *answer_prot;
260 unsigned char answer_flags;
261 int try_loading_module = 0;
264 sock->state = SS_UNCONNECTED;
266 /* Look for the requested type/protocol pair. */
268 err = -ESOCKTNOSUPPORT;
270 list_for_each_entry_rcu(answer, &inetsw[sock->type], list) {
273 /* Check the non-wild match. */
274 if (protocol == answer->protocol) {
275 if (protocol != IPPROTO_IP)
278 /* Check for the two wild cases. */
279 if (IPPROTO_IP == protocol) {
280 protocol = answer->protocol;
283 if (IPPROTO_IP == answer->protocol)
286 err = -EPROTONOSUPPORT;
290 if (try_loading_module < 2) {
293 * Be more specific, e.g. net-pf-2-proto-132-type-1
294 * (net-pf-PF_INET-proto-IPPROTO_SCTP-type-SOCK_STREAM)
296 if (++try_loading_module == 1)
297 request_module("net-pf-%d-proto-%d-type-%d",
298 PF_INET, protocol, sock->type);
300 * Fall back to generic, e.g. net-pf-2-proto-132
301 * (net-pf-PF_INET-proto-IPPROTO_SCTP)
304 request_module("net-pf-%d-proto-%d",
306 goto lookup_protocol;
312 if (sock->type == SOCK_RAW && !kern &&
313 !ns_capable(net->user_ns, CAP_NET_RAW))
316 sock->ops = answer->ops;
317 answer_prot = answer->prot;
318 answer_flags = answer->flags;
321 WARN_ON(!answer_prot->slab);
324 sk = sk_alloc(net, PF_INET, GFP_KERNEL, answer_prot, kern);
329 if (INET_PROTOSW_REUSE & answer_flags)
330 sk->sk_reuse = SK_CAN_REUSE;
333 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
337 if (SOCK_RAW == sock->type) {
338 inet->inet_num = protocol;
339 if (IPPROTO_RAW == protocol)
343 if (net->ipv4.sysctl_ip_no_pmtu_disc)
344 inet->pmtudisc = IP_PMTUDISC_DONT;
346 inet->pmtudisc = IP_PMTUDISC_WANT;
350 sock_init_data(sock, sk);
352 sk->sk_destruct = inet_sock_destruct;
353 sk->sk_protocol = protocol;
354 sk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
361 inet->mc_list = NULL;
364 sk_refcnt_debug_inc(sk);
366 if (inet->inet_num) {
367 /* It assumes that any protocol which allows
368 * the user to assign a number at socket
369 * creation time automatically
372 inet->inet_sport = htons(inet->inet_num);
373 /* Add to protocol hash chains. */
374 sk->sk_prot->hash(sk);
377 if (sk->sk_prot->init) {
378 err = sk->sk_prot->init(sk);
380 sk_common_release(sk);
391 * The peer socket should always be NULL (or else). When we call this
392 * function we are destroying the object and from then on nobody
393 * should refer to it.
395 int inet_release(struct socket *sock)
397 struct sock *sk = sock->sk;
402 /* Applications forget to leave groups before exiting */
403 ip_mc_drop_socket(sk);
405 /* If linger is set, we don't return until the close
406 * is complete. Otherwise we return immediately. The
407 * actually closing is done the same either way.
409 * If the close is due to the process exiting, we never
413 if (sock_flag(sk, SOCK_LINGER) &&
414 !(current->flags & PF_EXITING))
415 timeout = sk->sk_lingertime;
417 sk->sk_prot->close(sk, timeout);
421 EXPORT_SYMBOL(inet_release);
423 int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
425 struct sockaddr_in *addr = (struct sockaddr_in *)uaddr;
426 struct sock *sk = sock->sk;
427 struct inet_sock *inet = inet_sk(sk);
428 struct net *net = sock_net(sk);
431 u32 tb_id = RT_TABLE_LOCAL;
434 /* If the socket has its own bind function then use it. (RAW) */
435 if (sk->sk_prot->bind) {
436 err = sk->sk_prot->bind(sk, uaddr, addr_len);
440 if (addr_len < sizeof(struct sockaddr_in))
443 if (addr->sin_family != AF_INET) {
444 /* Compatibility games : accept AF_UNSPEC (mapped to AF_INET)
445 * only if s_addr is INADDR_ANY.
448 if (addr->sin_family != AF_UNSPEC ||
449 addr->sin_addr.s_addr != htonl(INADDR_ANY))
453 tb_id = vrf_dev_table_ifindex(net, sk->sk_bound_dev_if) ? : tb_id;
454 chk_addr_ret = inet_addr_type_table(net, addr->sin_addr.s_addr, tb_id);
456 /* Not specified by any standard per-se, however it breaks too
457 * many applications when removed. It is unfortunate since
458 * allowing applications to make a non-local bind solves
459 * several problems with systems using dynamic addressing.
460 * (ie. your servers still start up even if your ISDN link
461 * is temporarily down)
463 err = -EADDRNOTAVAIL;
464 if (!net->ipv4.sysctl_ip_nonlocal_bind &&
465 !(inet->freebind || inet->transparent) &&
466 addr->sin_addr.s_addr != htonl(INADDR_ANY) &&
467 chk_addr_ret != RTN_LOCAL &&
468 chk_addr_ret != RTN_MULTICAST &&
469 chk_addr_ret != RTN_BROADCAST)
472 snum = ntohs(addr->sin_port);
474 if (snum && snum < PROT_SOCK &&
475 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
478 /* We keep a pair of addresses. rcv_saddr is the one
479 * used by hash lookups, and saddr is used for transmit.
481 * In the BSD API these are the same except where it
482 * would be illegal to use them (multicast/broadcast) in
483 * which case the sending device address is used.
487 /* Check these errors (active socket, double bind). */
489 if (sk->sk_state != TCP_CLOSE || inet->inet_num)
490 goto out_release_sock;
492 inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr;
493 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
494 inet->inet_saddr = 0; /* Use device */
496 /* Make sure we are allowed to bind here. */
497 if ((snum || !inet->bind_address_no_port) &&
498 sk->sk_prot->get_port(sk, snum)) {
499 inet->inet_saddr = inet->inet_rcv_saddr = 0;
501 goto out_release_sock;
504 if (inet->inet_rcv_saddr)
505 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
507 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
508 inet->inet_sport = htons(inet->inet_num);
509 inet->inet_daddr = 0;
510 inet->inet_dport = 0;
518 EXPORT_SYMBOL(inet_bind);
520 int inet_dgram_connect(struct socket *sock, struct sockaddr *uaddr,
521 int addr_len, int flags)
523 struct sock *sk = sock->sk;
525 if (addr_len < sizeof(uaddr->sa_family))
527 if (uaddr->sa_family == AF_UNSPEC)
528 return sk->sk_prot->disconnect(sk, flags);
530 if (!inet_sk(sk)->inet_num && inet_autobind(sk))
532 return sk->sk_prot->connect(sk, uaddr, addr_len);
534 EXPORT_SYMBOL(inet_dgram_connect);
536 static long inet_wait_for_connect(struct sock *sk, long timeo, int writebias)
540 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
541 sk->sk_write_pending += writebias;
543 /* Basic assumption: if someone sets sk->sk_err, he _must_
544 * change state of the socket from TCP_SYN_*.
545 * Connect() does not allow to get error notifications
546 * without closing the socket.
548 while ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) {
550 timeo = schedule_timeout(timeo);
552 if (signal_pending(current) || !timeo)
554 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
556 finish_wait(sk_sleep(sk), &wait);
557 sk->sk_write_pending -= writebias;
562 * Connect to a remote host. There is regrettably still a little
563 * TCP 'magic' in here.
565 int __inet_stream_connect(struct socket *sock, struct sockaddr *uaddr,
566 int addr_len, int flags)
568 struct sock *sk = sock->sk;
572 if (addr_len < sizeof(uaddr->sa_family))
575 if (uaddr->sa_family == AF_UNSPEC) {
576 err = sk->sk_prot->disconnect(sk, flags);
577 sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED;
581 switch (sock->state) {
590 /* Fall out of switch with err, set for this state */
594 if (sk->sk_state != TCP_CLOSE)
597 err = sk->sk_prot->connect(sk, uaddr, addr_len);
601 sock->state = SS_CONNECTING;
603 /* Just entered SS_CONNECTING state; the only
604 * difference is that return value in non-blocking
605 * case is EINPROGRESS, rather than EALREADY.
611 timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
613 if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) {
614 int writebias = (sk->sk_protocol == IPPROTO_TCP) &&
615 tcp_sk(sk)->fastopen_req &&
616 tcp_sk(sk)->fastopen_req->data ? 1 : 0;
618 /* Error code is set above */
619 if (!timeo || !inet_wait_for_connect(sk, timeo, writebias))
622 err = sock_intr_errno(timeo);
623 if (signal_pending(current))
627 /* Connection was closed by RST, timeout, ICMP error
628 * or another process disconnected us.
630 if (sk->sk_state == TCP_CLOSE)
633 /* sk->sk_err may be not zero now, if RECVERR was ordered by user
634 * and error was received after socket entered established state.
635 * Hence, it is handled normally after connect() return successfully.
638 sock->state = SS_CONNECTED;
644 err = sock_error(sk) ? : -ECONNABORTED;
645 sock->state = SS_UNCONNECTED;
646 if (sk->sk_prot->disconnect(sk, flags))
647 sock->state = SS_DISCONNECTING;
650 EXPORT_SYMBOL(__inet_stream_connect);
652 int inet_stream_connect(struct socket *sock, struct sockaddr *uaddr,
653 int addr_len, int flags)
658 err = __inet_stream_connect(sock, uaddr, addr_len, flags);
659 release_sock(sock->sk);
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 sock_rps_record_flow(sk2);
680 WARN_ON(!((1 << sk2->sk_state) &
681 (TCPF_ESTABLISHED | TCPF_SYN_RECV |
682 TCPF_CLOSE_WAIT | TCPF_CLOSE)));
684 sock_graft(sk2, newsock);
686 newsock->state = SS_CONNECTED;
692 EXPORT_SYMBOL(inet_accept);
696 * This does both peername and sockname.
698 int inet_getname(struct socket *sock, struct sockaddr *uaddr,
699 int *uaddr_len, int peer)
701 struct sock *sk = sock->sk;
702 struct inet_sock *inet = inet_sk(sk);
703 DECLARE_SOCKADDR(struct sockaddr_in *, sin, uaddr);
705 sin->sin_family = AF_INET;
707 if (!inet->inet_dport ||
708 (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
711 sin->sin_port = inet->inet_dport;
712 sin->sin_addr.s_addr = inet->inet_daddr;
714 __be32 addr = inet->inet_rcv_saddr;
716 addr = inet->inet_saddr;
717 sin->sin_port = inet->inet_sport;
718 sin->sin_addr.s_addr = addr;
720 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
721 *uaddr_len = sizeof(*sin);
724 EXPORT_SYMBOL(inet_getname);
726 int inet_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
728 struct sock *sk = sock->sk;
730 sock_rps_record_flow(sk);
732 /* We may need to bind the socket. */
733 if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind &&
737 return sk->sk_prot->sendmsg(sk, msg, size);
739 EXPORT_SYMBOL(inet_sendmsg);
741 ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset,
742 size_t size, int flags)
744 struct sock *sk = sock->sk;
746 sock_rps_record_flow(sk);
748 /* We may need to bind the socket. */
749 if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind &&
753 if (sk->sk_prot->sendpage)
754 return sk->sk_prot->sendpage(sk, page, offset, size, flags);
755 return sock_no_sendpage(sock, page, offset, size, flags);
757 EXPORT_SYMBOL(inet_sendpage);
759 int inet_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
762 struct sock *sk = sock->sk;
766 sock_rps_record_flow(sk);
768 err = sk->sk_prot->recvmsg(sk, msg, size, flags & MSG_DONTWAIT,
769 flags & ~MSG_DONTWAIT, &addr_len);
771 msg->msg_namelen = addr_len;
774 EXPORT_SYMBOL(inet_recvmsg);
776 int inet_shutdown(struct socket *sock, int how)
778 struct sock *sk = sock->sk;
781 /* This should really check to make sure
782 * the socket is a TCP socket. (WHY AC...)
784 how++; /* maps 0->1 has the advantage of making bit 1 rcvs and
787 if ((how & ~SHUTDOWN_MASK) || !how) /* MAXINT->0 */
791 if (sock->state == SS_CONNECTING) {
792 if ((1 << sk->sk_state) &
793 (TCPF_SYN_SENT | TCPF_SYN_RECV | TCPF_CLOSE))
794 sock->state = SS_DISCONNECTING;
796 sock->state = SS_CONNECTED;
799 switch (sk->sk_state) {
802 /* Hack to wake up other listeners, who can poll for
803 POLLHUP, even on eg. unconnected UDP sockets -- RR */
805 sk->sk_shutdown |= how;
806 if (sk->sk_prot->shutdown)
807 sk->sk_prot->shutdown(sk, how);
810 /* Remaining two branches are temporary solution for missing
811 * close() in multithreaded environment. It is _not_ a good idea,
812 * but we have no choice until close() is repaired at VFS level.
815 if (!(how & RCV_SHUTDOWN))
819 err = sk->sk_prot->disconnect(sk, O_NONBLOCK);
820 sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED;
824 /* Wake up anyone sleeping in poll. */
825 sk->sk_state_change(sk);
829 EXPORT_SYMBOL(inet_shutdown);
832 * ioctl() calls you can issue on an INET socket. Most of these are
833 * device configuration and stuff and very rarely used. Some ioctls
834 * pass on to the socket itself.
836 * NOTE: I like the idea of a module for the config stuff. ie ifconfig
837 * loads the devconfigure module does its configuring and unloads it.
838 * There's a good 20K of config code hanging around the kernel.
841 int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
843 struct sock *sk = sock->sk;
845 struct net *net = sock_net(sk);
849 err = sock_get_timestamp(sk, (struct timeval __user *)arg);
852 err = sock_get_timestampns(sk, (struct timespec __user *)arg);
857 err = ip_rt_ioctl(net, cmd, (void __user *)arg);
862 err = arp_ioctl(net, cmd, (void __user *)arg);
875 err = devinet_ioctl(net, cmd, (void __user *)arg);
878 if (sk->sk_prot->ioctl)
879 err = sk->sk_prot->ioctl(sk, cmd, arg);
886 EXPORT_SYMBOL(inet_ioctl);
889 static int inet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
891 struct sock *sk = sock->sk;
892 int err = -ENOIOCTLCMD;
894 if (sk->sk_prot->compat_ioctl)
895 err = sk->sk_prot->compat_ioctl(sk, cmd, arg);
901 const struct proto_ops inet_stream_ops = {
903 .owner = THIS_MODULE,
904 .release = inet_release,
906 .connect = inet_stream_connect,
907 .socketpair = sock_no_socketpair,
908 .accept = inet_accept,
909 .getname = inet_getname,
912 .listen = inet_listen,
913 .shutdown = inet_shutdown,
914 .setsockopt = sock_common_setsockopt,
915 .getsockopt = sock_common_getsockopt,
916 .sendmsg = inet_sendmsg,
917 .recvmsg = inet_recvmsg,
918 .mmap = sock_no_mmap,
919 .sendpage = inet_sendpage,
920 .splice_read = tcp_splice_read,
922 .compat_setsockopt = compat_sock_common_setsockopt,
923 .compat_getsockopt = compat_sock_common_getsockopt,
924 .compat_ioctl = inet_compat_ioctl,
927 EXPORT_SYMBOL(inet_stream_ops);
929 const struct proto_ops inet_dgram_ops = {
931 .owner = THIS_MODULE,
932 .release = inet_release,
934 .connect = inet_dgram_connect,
935 .socketpair = sock_no_socketpair,
936 .accept = sock_no_accept,
937 .getname = inet_getname,
940 .listen = sock_no_listen,
941 .shutdown = inet_shutdown,
942 .setsockopt = sock_common_setsockopt,
943 .getsockopt = sock_common_getsockopt,
944 .sendmsg = inet_sendmsg,
945 .recvmsg = inet_recvmsg,
946 .mmap = sock_no_mmap,
947 .sendpage = inet_sendpage,
949 .compat_setsockopt = compat_sock_common_setsockopt,
950 .compat_getsockopt = compat_sock_common_getsockopt,
951 .compat_ioctl = inet_compat_ioctl,
954 EXPORT_SYMBOL(inet_dgram_ops);
957 * For SOCK_RAW sockets; should be the same as inet_dgram_ops but without
960 static const struct proto_ops inet_sockraw_ops = {
962 .owner = THIS_MODULE,
963 .release = inet_release,
965 .connect = inet_dgram_connect,
966 .socketpair = sock_no_socketpair,
967 .accept = sock_no_accept,
968 .getname = inet_getname,
969 .poll = datagram_poll,
971 .listen = sock_no_listen,
972 .shutdown = inet_shutdown,
973 .setsockopt = sock_common_setsockopt,
974 .getsockopt = sock_common_getsockopt,
975 .sendmsg = inet_sendmsg,
976 .recvmsg = inet_recvmsg,
977 .mmap = sock_no_mmap,
978 .sendpage = inet_sendpage,
980 .compat_setsockopt = compat_sock_common_setsockopt,
981 .compat_getsockopt = compat_sock_common_getsockopt,
982 .compat_ioctl = inet_compat_ioctl,
986 static const struct net_proto_family inet_family_ops = {
988 .create = inet_create,
989 .owner = THIS_MODULE,
992 /* Upon startup we insert all the elements in inetsw_array[] into
993 * the linked list inetsw.
995 static struct inet_protosw inetsw_array[] =
999 .protocol = IPPROTO_TCP,
1001 .ops = &inet_stream_ops,
1002 .flags = INET_PROTOSW_PERMANENT |
1008 .protocol = IPPROTO_UDP,
1010 .ops = &inet_dgram_ops,
1011 .flags = INET_PROTOSW_PERMANENT,
1016 .protocol = IPPROTO_ICMP,
1018 .ops = &inet_dgram_ops,
1019 .flags = INET_PROTOSW_REUSE,
1024 .protocol = IPPROTO_IP, /* wild card */
1026 .ops = &inet_sockraw_ops,
1027 .flags = INET_PROTOSW_REUSE,
1031 #define INETSW_ARRAY_LEN ARRAY_SIZE(inetsw_array)
1033 void inet_register_protosw(struct inet_protosw *p)
1035 struct list_head *lh;
1036 struct inet_protosw *answer;
1037 int protocol = p->protocol;
1038 struct list_head *last_perm;
1040 spin_lock_bh(&inetsw_lock);
1042 if (p->type >= SOCK_MAX)
1045 /* If we are trying to override a permanent protocol, bail. */
1047 last_perm = &inetsw[p->type];
1048 list_for_each(lh, &inetsw[p->type]) {
1049 answer = list_entry(lh, struct inet_protosw, list);
1051 /* Check only the non-wild match. */
1052 if (INET_PROTOSW_PERMANENT & answer->flags) {
1053 if (protocol == answer->protocol)
1063 /* Add the new entry after the last permanent entry if any, so that
1064 * the new entry does not override a permanent entry when matched with
1065 * a wild-card protocol. But it is allowed to override any existing
1066 * non-permanent entry. This means that when we remove this entry, the
1067 * system automatically returns to the old behavior.
1069 list_add_rcu(&p->list, last_perm);
1071 spin_unlock_bh(&inetsw_lock);
1076 pr_err("Attempt to override permanent protocol %d\n", protocol);
1080 pr_err("Ignoring attempt to register invalid socket type %d\n",
1084 EXPORT_SYMBOL(inet_register_protosw);
1086 void inet_unregister_protosw(struct inet_protosw *p)
1088 if (INET_PROTOSW_PERMANENT & p->flags) {
1089 pr_err("Attempt to unregister permanent protocol %d\n",
1092 spin_lock_bh(&inetsw_lock);
1093 list_del_rcu(&p->list);
1094 spin_unlock_bh(&inetsw_lock);
1099 EXPORT_SYMBOL(inet_unregister_protosw);
1102 * Shall we try to damage output packets if routing dev changes?
1105 int sysctl_ip_dynaddr __read_mostly;
1107 static int inet_sk_reselect_saddr(struct sock *sk)
1109 struct inet_sock *inet = inet_sk(sk);
1110 __be32 old_saddr = inet->inet_saddr;
1111 __be32 daddr = inet->inet_daddr;
1115 struct ip_options_rcu *inet_opt;
1117 inet_opt = rcu_dereference_protected(inet->inet_opt,
1118 sock_owned_by_user(sk));
1119 if (inet_opt && inet_opt->opt.srr)
1120 daddr = inet_opt->opt.faddr;
1122 /* Query new route. */
1123 fl4 = &inet->cork.fl.u.ip4;
1124 rt = ip_route_connect(fl4, daddr, 0, RT_CONN_FLAGS(sk),
1125 sk->sk_bound_dev_if, sk->sk_protocol,
1126 inet->inet_sport, inet->inet_dport, sk);
1130 sk_setup_caps(sk, &rt->dst);
1132 new_saddr = fl4->saddr;
1134 if (new_saddr == old_saddr)
1137 if (sysctl_ip_dynaddr > 1) {
1138 pr_info("%s(): shifting inet->saddr from %pI4 to %pI4\n",
1139 __func__, &old_saddr, &new_saddr);
1142 inet->inet_saddr = inet->inet_rcv_saddr = new_saddr;
1145 * XXX The only one ugly spot where we need to
1146 * XXX really change the sockets identity after
1147 * XXX it has entered the hashes. -DaveM
1149 * Besides that, it does not check for connection
1150 * uniqueness. Wait for troubles.
1152 __sk_prot_rehash(sk);
1156 int inet_sk_rebuild_header(struct sock *sk)
1158 struct inet_sock *inet = inet_sk(sk);
1159 struct rtable *rt = (struct rtable *)__sk_dst_check(sk, 0);
1161 struct ip_options_rcu *inet_opt;
1165 /* Route is OK, nothing to do. */
1171 inet_opt = rcu_dereference(inet->inet_opt);
1172 daddr = inet->inet_daddr;
1173 if (inet_opt && inet_opt->opt.srr)
1174 daddr = inet_opt->opt.faddr;
1176 fl4 = &inet->cork.fl.u.ip4;
1177 rt = ip_route_output_ports(sock_net(sk), fl4, sk, daddr, inet->inet_saddr,
1178 inet->inet_dport, inet->inet_sport,
1179 sk->sk_protocol, RT_CONN_FLAGS(sk),
1180 sk->sk_bound_dev_if);
1183 sk_setup_caps(sk, &rt->dst);
1187 /* Routing failed... */
1188 sk->sk_route_caps = 0;
1190 * Other protocols have to map its equivalent state to TCP_SYN_SENT.
1191 * DCCP maps its DCCP_REQUESTING state to TCP_SYN_SENT. -acme
1193 if (!sysctl_ip_dynaddr ||
1194 sk->sk_state != TCP_SYN_SENT ||
1195 (sk->sk_userlocks & SOCK_BINDADDR_LOCK) ||
1196 (err = inet_sk_reselect_saddr(sk)) != 0)
1197 sk->sk_err_soft = -err;
1202 EXPORT_SYMBOL(inet_sk_rebuild_header);
1204 static struct sk_buff *inet_gso_segment(struct sk_buff *skb,
1205 netdev_features_t features)
1207 struct sk_buff *segs = ERR_PTR(-EINVAL);
1208 const struct net_offload *ops;
1209 unsigned int offset = 0;
1210 bool udpfrag, encap;
1217 if (unlikely(skb_shinfo(skb)->gso_type &
1227 SKB_GSO_UDP_TUNNEL |
1228 SKB_GSO_UDP_TUNNEL_CSUM |
1229 SKB_GSO_TUNNEL_REMCSUM |
1233 skb_reset_network_header(skb);
1234 nhoff = skb_network_header(skb) - skb_mac_header(skb);
1235 if (unlikely(!pskb_may_pull(skb, sizeof(*iph))))
1240 if (ihl < sizeof(*iph))
1243 id = ntohs(iph->id);
1244 proto = iph->protocol;
1246 /* Warning: after this point, iph might be no longer valid */
1247 if (unlikely(!pskb_may_pull(skb, ihl)))
1249 __skb_pull(skb, ihl);
1251 encap = SKB_GSO_CB(skb)->encap_level > 0;
1253 features &= skb->dev->hw_enc_features;
1254 SKB_GSO_CB(skb)->encap_level += ihl;
1256 skb_reset_transport_header(skb);
1258 segs = ERR_PTR(-EPROTONOSUPPORT);
1260 if (skb->encapsulation &&
1261 skb_shinfo(skb)->gso_type & (SKB_GSO_SIT|SKB_GSO_IPIP))
1262 udpfrag = proto == IPPROTO_UDP && encap;
1264 udpfrag = proto == IPPROTO_UDP && !skb->encapsulation;
1266 ops = rcu_dereference(inet_offloads[proto]);
1267 if (likely(ops && ops->callbacks.gso_segment))
1268 segs = ops->callbacks.gso_segment(skb, features);
1270 if (IS_ERR_OR_NULL(segs))
1275 iph = (struct iphdr *)(skb_mac_header(skb) + nhoff);
1277 iph->id = htons(id);
1278 iph->frag_off = htons(offset >> 3);
1280 iph->frag_off |= htons(IP_MF);
1281 offset += skb->len - nhoff - ihl;
1283 iph->id = htons(id++);
1285 iph->tot_len = htons(skb->len - nhoff);
1288 skb_reset_inner_headers(skb);
1289 skb->network_header = (u8 *)iph - skb->head;
1290 } while ((skb = skb->next));
1296 static struct sk_buff **inet_gro_receive(struct sk_buff **head,
1297 struct sk_buff *skb)
1299 const struct net_offload *ops;
1300 struct sk_buff **pp = NULL;
1302 const struct iphdr *iph;
1309 off = skb_gro_offset(skb);
1310 hlen = off + sizeof(*iph);
1311 iph = skb_gro_header_fast(skb, off);
1312 if (skb_gro_header_hard(skb, hlen)) {
1313 iph = skb_gro_header_slow(skb, hlen, off);
1318 proto = iph->protocol;
1321 ops = rcu_dereference(inet_offloads[proto]);
1322 if (!ops || !ops->callbacks.gro_receive)
1325 if (*(u8 *)iph != 0x45)
1328 if (unlikely(ip_fast_csum((u8 *)iph, 5)))
1331 id = ntohl(*(__be32 *)&iph->id);
1332 flush = (u16)((ntohl(*(__be32 *)iph) ^ skb_gro_len(skb)) | (id & ~IP_DF));
1335 for (p = *head; p; p = p->next) {
1338 if (!NAPI_GRO_CB(p)->same_flow)
1341 iph2 = (struct iphdr *)(p->data + off);
1342 /* The above works because, with the exception of the top
1343 * (inner most) layer, we only aggregate pkts with the same
1344 * hdr length so all the hdrs we'll need to verify will start
1345 * at the same offset.
1347 if ((iph->protocol ^ iph2->protocol) |
1348 ((__force u32)iph->saddr ^ (__force u32)iph2->saddr) |
1349 ((__force u32)iph->daddr ^ (__force u32)iph2->daddr)) {
1350 NAPI_GRO_CB(p)->same_flow = 0;
1354 /* All fields must match except length and checksum. */
1355 NAPI_GRO_CB(p)->flush |=
1356 (iph->ttl ^ iph2->ttl) |
1357 (iph->tos ^ iph2->tos) |
1358 ((iph->frag_off ^ iph2->frag_off) & htons(IP_DF));
1360 /* Save the IP ID check to be included later when we get to
1361 * the transport layer so only the inner most IP ID is checked.
1362 * This is because some GSO/TSO implementations do not
1363 * correctly increment the IP ID for the outer hdrs.
1365 NAPI_GRO_CB(p)->flush_id =
1366 ((u16)(ntohs(iph2->id) + NAPI_GRO_CB(p)->count) ^ id);
1367 NAPI_GRO_CB(p)->flush |= flush;
1370 NAPI_GRO_CB(skb)->flush |= flush;
1371 skb_set_network_header(skb, off);
1372 /* The above will be needed by the transport layer if there is one
1373 * immediately following this IP hdr.
1376 /* Note : No need to call skb_gro_postpull_rcsum() here,
1377 * as we already checked checksum over ipv4 header was 0
1379 skb_gro_pull(skb, sizeof(*iph));
1380 skb_set_transport_header(skb, skb_gro_offset(skb));
1382 pp = ops->callbacks.gro_receive(head, skb);
1388 NAPI_GRO_CB(skb)->flush |= flush;
1393 int inet_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len)
1395 if (sk->sk_family == AF_INET)
1396 return ip_recv_error(sk, msg, len, addr_len);
1397 #if IS_ENABLED(CONFIG_IPV6)
1398 if (sk->sk_family == AF_INET6)
1399 return pingv6_ops.ipv6_recv_error(sk, msg, len, addr_len);
1404 static int inet_gro_complete(struct sk_buff *skb, int nhoff)
1406 __be16 newlen = htons(skb->len - nhoff);
1407 struct iphdr *iph = (struct iphdr *)(skb->data + nhoff);
1408 const struct net_offload *ops;
1409 int proto = iph->protocol;
1412 if (skb->encapsulation)
1413 skb_set_inner_network_header(skb, nhoff);
1415 csum_replace2(&iph->check, iph->tot_len, newlen);
1416 iph->tot_len = newlen;
1419 ops = rcu_dereference(inet_offloads[proto]);
1420 if (WARN_ON(!ops || !ops->callbacks.gro_complete))
1423 /* Only need to add sizeof(*iph) to get to the next hdr below
1424 * because any hdr with option will have been flushed in
1425 * inet_gro_receive().
1427 err = ops->callbacks.gro_complete(skb, nhoff + sizeof(*iph));
1435 int inet_ctl_sock_create(struct sock **sk, unsigned short family,
1436 unsigned short type, unsigned char protocol,
1439 struct socket *sock;
1440 int rc = sock_create_kern(net, family, type, protocol, &sock);
1444 (*sk)->sk_allocation = GFP_ATOMIC;
1446 * Unhash it so that IP input processing does not even see it,
1447 * we do not wish this socket to see incoming packets.
1449 (*sk)->sk_prot->unhash(*sk);
1453 EXPORT_SYMBOL_GPL(inet_ctl_sock_create);
1455 u64 snmp_get_cpu_field(void __percpu *mib, int cpu, int offt)
1457 return *(((unsigned long *)per_cpu_ptr(mib, cpu)) + offt);
1459 EXPORT_SYMBOL_GPL(snmp_get_cpu_field);
1461 unsigned long snmp_fold_field(void __percpu *mib, int offt)
1463 unsigned long res = 0;
1466 for_each_possible_cpu(i)
1467 res += snmp_get_cpu_field(mib, i, offt);
1470 EXPORT_SYMBOL_GPL(snmp_fold_field);
1472 #if BITS_PER_LONG==32
1474 u64 snmp_get_cpu_field64(void __percpu *mib, int cpu, int offt,
1475 size_t syncp_offset)
1478 struct u64_stats_sync *syncp;
1482 bhptr = per_cpu_ptr(mib, cpu);
1483 syncp = (struct u64_stats_sync *)(bhptr + syncp_offset);
1485 start = u64_stats_fetch_begin_irq(syncp);
1486 v = *(((u64 *)bhptr) + offt);
1487 } while (u64_stats_fetch_retry_irq(syncp, start));
1491 EXPORT_SYMBOL_GPL(snmp_get_cpu_field64);
1493 u64 snmp_fold_field64(void __percpu *mib, int offt, size_t syncp_offset)
1498 for_each_possible_cpu(cpu) {
1499 res += snmp_get_cpu_field64(mib, cpu, offt, syncp_offset);
1503 EXPORT_SYMBOL_GPL(snmp_fold_field64);
1506 #ifdef CONFIG_IP_MULTICAST
1507 static const struct net_protocol igmp_protocol = {
1508 .handler = igmp_rcv,
1513 static const struct net_protocol tcp_protocol = {
1514 .early_demux = tcp_v4_early_demux,
1515 .handler = tcp_v4_rcv,
1516 .err_handler = tcp_v4_err,
1519 .icmp_strict_tag_validation = 1,
1522 static const struct net_protocol udp_protocol = {
1523 .early_demux = udp_v4_early_demux,
1525 .err_handler = udp_err,
1530 static const struct net_protocol icmp_protocol = {
1531 .handler = icmp_rcv,
1532 .err_handler = icmp_err,
1537 static __net_init int ipv4_mib_init_net(struct net *net)
1541 net->mib.tcp_statistics = alloc_percpu(struct tcp_mib);
1542 if (!net->mib.tcp_statistics)
1544 net->mib.ip_statistics = alloc_percpu(struct ipstats_mib);
1545 if (!net->mib.ip_statistics)
1548 for_each_possible_cpu(i) {
1549 struct ipstats_mib *af_inet_stats;
1550 af_inet_stats = per_cpu_ptr(net->mib.ip_statistics, i);
1551 u64_stats_init(&af_inet_stats->syncp);
1554 net->mib.net_statistics = alloc_percpu(struct linux_mib);
1555 if (!net->mib.net_statistics)
1557 net->mib.udp_statistics = alloc_percpu(struct udp_mib);
1558 if (!net->mib.udp_statistics)
1560 net->mib.udplite_statistics = alloc_percpu(struct udp_mib);
1561 if (!net->mib.udplite_statistics)
1562 goto err_udplite_mib;
1563 net->mib.icmp_statistics = alloc_percpu(struct icmp_mib);
1564 if (!net->mib.icmp_statistics)
1566 net->mib.icmpmsg_statistics = kzalloc(sizeof(struct icmpmsg_mib),
1568 if (!net->mib.icmpmsg_statistics)
1569 goto err_icmpmsg_mib;
1575 free_percpu(net->mib.icmp_statistics);
1577 free_percpu(net->mib.udplite_statistics);
1579 free_percpu(net->mib.udp_statistics);
1581 free_percpu(net->mib.net_statistics);
1583 free_percpu(net->mib.ip_statistics);
1585 free_percpu(net->mib.tcp_statistics);
1590 static __net_exit void ipv4_mib_exit_net(struct net *net)
1592 kfree(net->mib.icmpmsg_statistics);
1593 free_percpu(net->mib.icmp_statistics);
1594 free_percpu(net->mib.udplite_statistics);
1595 free_percpu(net->mib.udp_statistics);
1596 free_percpu(net->mib.net_statistics);
1597 free_percpu(net->mib.ip_statistics);
1598 free_percpu(net->mib.tcp_statistics);
1601 static __net_initdata struct pernet_operations ipv4_mib_ops = {
1602 .init = ipv4_mib_init_net,
1603 .exit = ipv4_mib_exit_net,
1606 static int __init init_ipv4_mibs(void)
1608 return register_pernet_subsys(&ipv4_mib_ops);
1611 static __net_init int inet_init_net(struct net *net)
1614 * Set defaults for local port range
1616 seqlock_init(&net->ipv4.ip_local_ports.lock);
1617 net->ipv4.ip_local_ports.range[0] = 32768;
1618 net->ipv4.ip_local_ports.range[1] = 60999;
1620 seqlock_init(&net->ipv4.ping_group_range.lock);
1622 * Sane defaults - nobody may create ping sockets.
1623 * Boot scripts should set this to distro-specific group.
1625 net->ipv4.ping_group_range.range[0] = make_kgid(&init_user_ns, 1);
1626 net->ipv4.ping_group_range.range[1] = make_kgid(&init_user_ns, 0);
1630 static __net_exit void inet_exit_net(struct net *net)
1634 static __net_initdata struct pernet_operations af_inet_ops = {
1635 .init = inet_init_net,
1636 .exit = inet_exit_net,
1639 static int __init init_inet_pernet_ops(void)
1641 return register_pernet_subsys(&af_inet_ops);
1644 static int ipv4_proc_init(void);
1647 * IP protocol layer initialiser
1650 static struct packet_offload ip_packet_offload __read_mostly = {
1651 .type = cpu_to_be16(ETH_P_IP),
1653 .gso_segment = inet_gso_segment,
1654 .gro_receive = inet_gro_receive,
1655 .gro_complete = inet_gro_complete,
1659 static const struct net_offload ipip_offload = {
1661 .gso_segment = inet_gso_segment,
1662 .gro_receive = inet_gro_receive,
1663 .gro_complete = inet_gro_complete,
1667 static int __init ipv4_offload_init(void)
1672 if (udpv4_offload_init() < 0)
1673 pr_crit("%s: Cannot add UDP protocol offload\n", __func__);
1674 if (tcpv4_offload_init() < 0)
1675 pr_crit("%s: Cannot add TCP protocol offload\n", __func__);
1677 dev_add_offload(&ip_packet_offload);
1678 inet_add_offload(&ipip_offload, IPPROTO_IPIP);
1682 fs_initcall(ipv4_offload_init);
1684 static struct packet_type ip_packet_type __read_mostly = {
1685 .type = cpu_to_be16(ETH_P_IP),
1689 static int __init inet_init(void)
1691 struct inet_protosw *q;
1692 struct list_head *r;
1695 sock_skb_cb_check_size(sizeof(struct inet_skb_parm));
1697 rc = proto_register(&tcp_prot, 1);
1701 rc = proto_register(&udp_prot, 1);
1703 goto out_unregister_tcp_proto;
1705 rc = proto_register(&raw_prot, 1);
1707 goto out_unregister_udp_proto;
1709 rc = proto_register(&ping_prot, 1);
1711 goto out_unregister_raw_proto;
1714 * Tell SOCKET that we are alive...
1717 (void)sock_register(&inet_family_ops);
1719 #ifdef CONFIG_SYSCTL
1720 ip_static_sysctl_init();
1724 * Add all the base protocols.
1727 if (inet_add_protocol(&icmp_protocol, IPPROTO_ICMP) < 0)
1728 pr_crit("%s: Cannot add ICMP protocol\n", __func__);
1729 if (inet_add_protocol(&udp_protocol, IPPROTO_UDP) < 0)
1730 pr_crit("%s: Cannot add UDP protocol\n", __func__);
1731 if (inet_add_protocol(&tcp_protocol, IPPROTO_TCP) < 0)
1732 pr_crit("%s: Cannot add TCP protocol\n", __func__);
1733 #ifdef CONFIG_IP_MULTICAST
1734 if (inet_add_protocol(&igmp_protocol, IPPROTO_IGMP) < 0)
1735 pr_crit("%s: Cannot add IGMP protocol\n", __func__);
1738 /* Register the socket-side information for inet_create. */
1739 for (r = &inetsw[0]; r < &inetsw[SOCK_MAX]; ++r)
1742 for (q = inetsw_array; q < &inetsw_array[INETSW_ARRAY_LEN]; ++q)
1743 inet_register_protosw(q);
1746 * Set the ARP module up
1752 * Set the IP module up
1759 /* Setup TCP slab cache for open requests. */
1762 /* Setup UDP memory threshold */
1765 /* Add UDP-Lite (RFC 3828) */
1766 udplite4_register();
1771 * Set the ICMP layer up
1774 if (icmp_init() < 0)
1775 panic("Failed to create the ICMP control socket.\n");
1778 * Initialise the multicast router
1780 #if defined(CONFIG_IP_MROUTE)
1782 pr_crit("%s: Cannot init ipv4 mroute\n", __func__);
1785 if (init_inet_pernet_ops())
1786 pr_crit("%s: Cannot init ipv4 inet pernet ops\n", __func__);
1788 * Initialise per-cpu ipv4 mibs
1791 if (init_ipv4_mibs())
1792 pr_crit("%s: Cannot init ipv4 mibs\n", __func__);
1798 dev_add_pack(&ip_packet_type);
1800 ip_tunnel_core_init();
1805 out_unregister_raw_proto:
1806 proto_unregister(&raw_prot);
1807 out_unregister_udp_proto:
1808 proto_unregister(&udp_prot);
1809 out_unregister_tcp_proto:
1810 proto_unregister(&tcp_prot);
1814 fs_initcall(inet_init);
1816 /* ------------------------------------------------------------------------ */
1818 #ifdef CONFIG_PROC_FS
1819 static int __init ipv4_proc_init(void)
1823 if (raw_proc_init())
1825 if (tcp4_proc_init())
1827 if (udp4_proc_init())
1829 if (ping_proc_init())
1831 if (ip_misc_proc_init())
1848 #else /* CONFIG_PROC_FS */
1849 static int __init ipv4_proc_init(void)
1853 #endif /* CONFIG_PROC_FS */
1855 MODULE_ALIAS_NETPROTO(PF_INET);