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>
122 #include <net/l3mdev.h>
124 #ifdef CONFIG_ANDROID_PARANOID_NETWORK
125 #include <linux/android_aid.h>
127 static inline int current_has_network(void)
129 return in_egroup_p(AID_INET) || capable(CAP_NET_RAW);
132 static inline int current_has_network(void)
138 /* The inetsw table contains everything that inet_create needs to
139 * build a new socket.
141 static struct list_head inetsw[SOCK_MAX];
142 static DEFINE_SPINLOCK(inetsw_lock);
144 /* New destruction routine */
146 void inet_sock_destruct(struct sock *sk)
148 struct inet_sock *inet = inet_sk(sk);
150 __skb_queue_purge(&sk->sk_receive_queue);
151 __skb_queue_purge(&sk->sk_error_queue);
155 if (sk->sk_type == SOCK_STREAM && sk->sk_state != TCP_CLOSE) {
156 pr_err("Attempt to release TCP socket in state %d %p\n",
160 if (!sock_flag(sk, SOCK_DEAD)) {
161 pr_err("Attempt to release alive inet socket %p\n", sk);
165 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
166 WARN_ON(atomic_read(&sk->sk_wmem_alloc));
167 WARN_ON(sk->sk_wmem_queued);
168 WARN_ON(sk->sk_forward_alloc);
170 kfree(rcu_dereference_protected(inet->inet_opt, 1));
171 dst_release(rcu_dereference_check(sk->sk_dst_cache, 1));
172 dst_release(sk->sk_rx_dst);
173 sk_refcnt_debug_dec(sk);
175 EXPORT_SYMBOL(inet_sock_destruct);
178 * The routines beyond this point handle the behaviour of an AF_INET
179 * socket object. Mostly it punts to the subprotocols of IP to do
184 * Automatically bind an unbound socket.
187 static int inet_autobind(struct sock *sk)
189 struct inet_sock *inet;
190 /* We may need to bind the socket. */
193 if (!inet->inet_num) {
194 if (sk->sk_prot->get_port(sk, 0)) {
198 inet->inet_sport = htons(inet->inet_num);
205 * Move a socket into listening state.
207 int inet_listen(struct socket *sock, int backlog)
209 struct sock *sk = sock->sk;
210 unsigned char old_state;
216 if (sock->state != SS_UNCONNECTED || sock->type != SOCK_STREAM)
219 old_state = sk->sk_state;
220 if (!((1 << old_state) & (TCPF_CLOSE | TCPF_LISTEN)))
223 /* Really, if the socket is already in listen state
224 * we can only allow the backlog to be adjusted.
226 if (old_state != TCP_LISTEN) {
227 /* Check special setups for testing purpose to enable TFO w/o
228 * requiring TCP_FASTOPEN sockopt.
229 * Note that only TCP sockets (SOCK_STREAM) will reach here.
230 * Also fastopenq may already been allocated because this
231 * socket was in TCP_LISTEN state previously but was
232 * shutdown() (rather than close()).
234 if ((sysctl_tcp_fastopen & TFO_SERVER_ENABLE) != 0 &&
235 !inet_csk(sk)->icsk_accept_queue.fastopenq.max_qlen) {
236 if ((sysctl_tcp_fastopen & TFO_SERVER_WO_SOCKOPT1) != 0)
237 fastopen_queue_tune(sk, backlog);
238 else if ((sysctl_tcp_fastopen &
239 TFO_SERVER_WO_SOCKOPT2) != 0)
240 fastopen_queue_tune(sk,
241 ((uint)sysctl_tcp_fastopen) >> 16);
243 tcp_fastopen_init_key_once(true);
245 err = inet_csk_listen_start(sk, backlog);
249 sk->sk_max_ack_backlog = backlog;
256 EXPORT_SYMBOL(inet_listen);
259 * Create an inet socket.
262 static int inet_create(struct net *net, struct socket *sock, int protocol,
266 struct inet_protosw *answer;
267 struct inet_sock *inet;
268 struct proto *answer_prot;
269 unsigned char answer_flags;
270 int try_loading_module = 0;
273 if (protocol < 0 || protocol >= IPPROTO_MAX)
276 if (!current_has_network())
279 sock->state = SS_UNCONNECTED;
281 /* Look for the requested type/protocol pair. */
283 err = -ESOCKTNOSUPPORT;
285 list_for_each_entry_rcu(answer, &inetsw[sock->type], list) {
288 /* Check the non-wild match. */
289 if (protocol == answer->protocol) {
290 if (protocol != IPPROTO_IP)
293 /* Check for the two wild cases. */
294 if (IPPROTO_IP == protocol) {
295 protocol = answer->protocol;
298 if (IPPROTO_IP == answer->protocol)
301 err = -EPROTONOSUPPORT;
305 if (try_loading_module < 2) {
308 * Be more specific, e.g. net-pf-2-proto-132-type-1
309 * (net-pf-PF_INET-proto-IPPROTO_SCTP-type-SOCK_STREAM)
311 if (++try_loading_module == 1)
312 request_module("net-pf-%d-proto-%d-type-%d",
313 PF_INET, protocol, sock->type);
315 * Fall back to generic, e.g. net-pf-2-proto-132
316 * (net-pf-PF_INET-proto-IPPROTO_SCTP)
319 request_module("net-pf-%d-proto-%d",
321 goto lookup_protocol;
327 if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW))
330 sock->ops = answer->ops;
331 answer_prot = answer->prot;
332 answer_flags = answer->flags;
335 WARN_ON(!answer_prot->slab);
338 sk = sk_alloc(net, PF_INET, GFP_KERNEL, answer_prot, kern);
343 if (INET_PROTOSW_REUSE & answer_flags)
344 sk->sk_reuse = SK_CAN_REUSE;
347 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
351 if (SOCK_RAW == sock->type) {
352 inet->inet_num = protocol;
353 if (IPPROTO_RAW == protocol)
357 if (net->ipv4.sysctl_ip_no_pmtu_disc)
358 inet->pmtudisc = IP_PMTUDISC_DONT;
360 inet->pmtudisc = IP_PMTUDISC_WANT;
364 sock_init_data(sock, sk);
366 sk->sk_destruct = inet_sock_destruct;
367 sk->sk_protocol = protocol;
368 sk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
375 inet->mc_list = NULL;
378 sk_refcnt_debug_inc(sk);
380 if (inet->inet_num) {
381 /* It assumes that any protocol which allows
382 * the user to assign a number at socket
383 * creation time automatically
386 inet->inet_sport = htons(inet->inet_num);
387 /* Add to protocol hash chains. */
388 sk->sk_prot->hash(sk);
391 if (sk->sk_prot->init) {
392 err = sk->sk_prot->init(sk);
394 sk_common_release(sk);
405 * The peer socket should always be NULL (or else). When we call this
406 * function we are destroying the object and from then on nobody
407 * should refer to it.
409 int inet_release(struct socket *sock)
411 struct sock *sk = sock->sk;
416 /* Applications forget to leave groups before exiting */
417 ip_mc_drop_socket(sk);
419 /* If linger is set, we don't return until the close
420 * is complete. Otherwise we return immediately. The
421 * actually closing is done the same either way.
423 * If the close is due to the process exiting, we never
427 if (sock_flag(sk, SOCK_LINGER) &&
428 !(current->flags & PF_EXITING))
429 timeout = sk->sk_lingertime;
431 sk->sk_prot->close(sk, timeout);
435 EXPORT_SYMBOL(inet_release);
437 int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
439 struct sockaddr_in *addr = (struct sockaddr_in *)uaddr;
440 struct sock *sk = sock->sk;
441 struct inet_sock *inet = inet_sk(sk);
442 struct net *net = sock_net(sk);
445 u32 tb_id = RT_TABLE_LOCAL;
448 /* If the socket has its own bind function then use it. (RAW) */
449 if (sk->sk_prot->bind) {
450 err = sk->sk_prot->bind(sk, uaddr, addr_len);
454 if (addr_len < sizeof(struct sockaddr_in))
457 if (addr->sin_family != AF_INET) {
458 /* Compatibility games : accept AF_UNSPEC (mapped to AF_INET)
459 * only if s_addr is INADDR_ANY.
462 if (addr->sin_family != AF_UNSPEC ||
463 addr->sin_addr.s_addr != htonl(INADDR_ANY))
467 tb_id = l3mdev_fib_table_by_index(net, sk->sk_bound_dev_if) ? : tb_id;
468 chk_addr_ret = inet_addr_type_table(net, addr->sin_addr.s_addr, tb_id);
470 /* Not specified by any standard per-se, however it breaks too
471 * many applications when removed. It is unfortunate since
472 * allowing applications to make a non-local bind solves
473 * several problems with systems using dynamic addressing.
474 * (ie. your servers still start up even if your ISDN link
475 * is temporarily down)
477 err = -EADDRNOTAVAIL;
478 if (!net->ipv4.sysctl_ip_nonlocal_bind &&
479 !(inet->freebind || inet->transparent) &&
480 addr->sin_addr.s_addr != htonl(INADDR_ANY) &&
481 chk_addr_ret != RTN_LOCAL &&
482 chk_addr_ret != RTN_MULTICAST &&
483 chk_addr_ret != RTN_BROADCAST)
486 snum = ntohs(addr->sin_port);
488 if (snum && snum < PROT_SOCK &&
489 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
492 /* We keep a pair of addresses. rcv_saddr is the one
493 * used by hash lookups, and saddr is used for transmit.
495 * In the BSD API these are the same except where it
496 * would be illegal to use them (multicast/broadcast) in
497 * which case the sending device address is used.
501 /* Check these errors (active socket, double bind). */
503 if (sk->sk_state != TCP_CLOSE || inet->inet_num)
504 goto out_release_sock;
506 inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr;
507 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
508 inet->inet_saddr = 0; /* Use device */
510 /* Make sure we are allowed to bind here. */
511 if ((snum || !inet->bind_address_no_port) &&
512 sk->sk_prot->get_port(sk, snum)) {
513 inet->inet_saddr = inet->inet_rcv_saddr = 0;
515 goto out_release_sock;
518 if (inet->inet_rcv_saddr)
519 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
521 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
522 inet->inet_sport = htons(inet->inet_num);
523 inet->inet_daddr = 0;
524 inet->inet_dport = 0;
532 EXPORT_SYMBOL(inet_bind);
534 int inet_dgram_connect(struct socket *sock, struct sockaddr *uaddr,
535 int addr_len, int flags)
537 struct sock *sk = sock->sk;
539 if (addr_len < sizeof(uaddr->sa_family))
541 if (uaddr->sa_family == AF_UNSPEC)
542 return sk->sk_prot->disconnect(sk, flags);
544 if (!inet_sk(sk)->inet_num && inet_autobind(sk))
546 return sk->sk_prot->connect(sk, uaddr, addr_len);
548 EXPORT_SYMBOL(inet_dgram_connect);
550 static long inet_wait_for_connect(struct sock *sk, long timeo, int writebias)
554 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
555 sk->sk_write_pending += writebias;
557 /* Basic assumption: if someone sets sk->sk_err, he _must_
558 * change state of the socket from TCP_SYN_*.
559 * Connect() does not allow to get error notifications
560 * without closing the socket.
562 while ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) {
564 timeo = schedule_timeout(timeo);
566 if (signal_pending(current) || !timeo)
568 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
570 finish_wait(sk_sleep(sk), &wait);
571 sk->sk_write_pending -= writebias;
576 * Connect to a remote host. There is regrettably still a little
577 * TCP 'magic' in here.
579 int __inet_stream_connect(struct socket *sock, struct sockaddr *uaddr,
580 int addr_len, int flags)
582 struct sock *sk = sock->sk;
586 if (addr_len < sizeof(uaddr->sa_family))
589 if (uaddr->sa_family == AF_UNSPEC) {
590 err = sk->sk_prot->disconnect(sk, flags);
591 sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED;
595 switch (sock->state) {
604 /* Fall out of switch with err, set for this state */
608 if (sk->sk_state != TCP_CLOSE)
611 err = sk->sk_prot->connect(sk, uaddr, addr_len);
615 sock->state = SS_CONNECTING;
617 /* Just entered SS_CONNECTING state; the only
618 * difference is that return value in non-blocking
619 * case is EINPROGRESS, rather than EALREADY.
625 timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
627 if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) {
628 int writebias = (sk->sk_protocol == IPPROTO_TCP) &&
629 tcp_sk(sk)->fastopen_req &&
630 tcp_sk(sk)->fastopen_req->data ? 1 : 0;
632 /* Error code is set above */
633 if (!timeo || !inet_wait_for_connect(sk, timeo, writebias))
636 err = sock_intr_errno(timeo);
637 if (signal_pending(current))
641 /* Connection was closed by RST, timeout, ICMP error
642 * or another process disconnected us.
644 if (sk->sk_state == TCP_CLOSE)
647 /* sk->sk_err may be not zero now, if RECVERR was ordered by user
648 * and error was received after socket entered established state.
649 * Hence, it is handled normally after connect() return successfully.
652 sock->state = SS_CONNECTED;
658 err = sock_error(sk) ? : -ECONNABORTED;
659 sock->state = SS_UNCONNECTED;
660 if (sk->sk_prot->disconnect(sk, flags))
661 sock->state = SS_DISCONNECTING;
664 EXPORT_SYMBOL(__inet_stream_connect);
666 int inet_stream_connect(struct socket *sock, struct sockaddr *uaddr,
667 int addr_len, int flags)
672 err = __inet_stream_connect(sock, uaddr, addr_len, flags);
673 release_sock(sock->sk);
676 EXPORT_SYMBOL(inet_stream_connect);
679 * Accept a pending connection. The TCP layer now gives BSD semantics.
682 int inet_accept(struct socket *sock, struct socket *newsock, int flags)
684 struct sock *sk1 = sock->sk;
686 struct sock *sk2 = sk1->sk_prot->accept(sk1, flags, &err);
693 sock_rps_record_flow(sk2);
694 WARN_ON(!((1 << sk2->sk_state) &
695 (TCPF_ESTABLISHED | TCPF_SYN_RECV |
696 TCPF_CLOSE_WAIT | TCPF_CLOSE)));
698 sock_graft(sk2, newsock);
700 newsock->state = SS_CONNECTED;
706 EXPORT_SYMBOL(inet_accept);
710 * This does both peername and sockname.
712 int inet_getname(struct socket *sock, struct sockaddr *uaddr,
713 int *uaddr_len, int peer)
715 struct sock *sk = sock->sk;
716 struct inet_sock *inet = inet_sk(sk);
717 DECLARE_SOCKADDR(struct sockaddr_in *, sin, uaddr);
719 sin->sin_family = AF_INET;
721 if (!inet->inet_dport ||
722 (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
725 sin->sin_port = inet->inet_dport;
726 sin->sin_addr.s_addr = inet->inet_daddr;
728 __be32 addr = inet->inet_rcv_saddr;
730 addr = inet->inet_saddr;
731 sin->sin_port = inet->inet_sport;
732 sin->sin_addr.s_addr = addr;
734 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
735 *uaddr_len = sizeof(*sin);
738 EXPORT_SYMBOL(inet_getname);
740 int inet_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
742 struct sock *sk = sock->sk;
744 sock_rps_record_flow(sk);
746 /* We may need to bind the socket. */
747 if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind &&
751 return sk->sk_prot->sendmsg(sk, msg, size);
753 EXPORT_SYMBOL(inet_sendmsg);
755 ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset,
756 size_t size, int flags)
758 struct sock *sk = sock->sk;
760 sock_rps_record_flow(sk);
762 /* We may need to bind the socket. */
763 if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind &&
767 if (sk->sk_prot->sendpage)
768 return sk->sk_prot->sendpage(sk, page, offset, size, flags);
769 return sock_no_sendpage(sock, page, offset, size, flags);
771 EXPORT_SYMBOL(inet_sendpage);
773 int inet_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
776 struct sock *sk = sock->sk;
780 sock_rps_record_flow(sk);
782 err = sk->sk_prot->recvmsg(sk, msg, size, flags & MSG_DONTWAIT,
783 flags & ~MSG_DONTWAIT, &addr_len);
785 msg->msg_namelen = addr_len;
788 EXPORT_SYMBOL(inet_recvmsg);
790 int inet_shutdown(struct socket *sock, int how)
792 struct sock *sk = sock->sk;
795 /* This should really check to make sure
796 * the socket is a TCP socket. (WHY AC...)
798 how++; /* maps 0->1 has the advantage of making bit 1 rcvs and
801 if ((how & ~SHUTDOWN_MASK) || !how) /* MAXINT->0 */
805 if (sock->state == SS_CONNECTING) {
806 if ((1 << sk->sk_state) &
807 (TCPF_SYN_SENT | TCPF_SYN_RECV | TCPF_CLOSE))
808 sock->state = SS_DISCONNECTING;
810 sock->state = SS_CONNECTED;
813 switch (sk->sk_state) {
816 /* Hack to wake up other listeners, who can poll for
817 POLLHUP, even on eg. unconnected UDP sockets -- RR */
819 sk->sk_shutdown |= how;
820 if (sk->sk_prot->shutdown)
821 sk->sk_prot->shutdown(sk, how);
824 /* Remaining two branches are temporary solution for missing
825 * close() in multithreaded environment. It is _not_ a good idea,
826 * but we have no choice until close() is repaired at VFS level.
829 if (!(how & RCV_SHUTDOWN))
833 err = sk->sk_prot->disconnect(sk, O_NONBLOCK);
834 sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED;
838 /* Wake up anyone sleeping in poll. */
839 sk->sk_state_change(sk);
843 EXPORT_SYMBOL(inet_shutdown);
846 * ioctl() calls you can issue on an INET socket. Most of these are
847 * device configuration and stuff and very rarely used. Some ioctls
848 * pass on to the socket itself.
850 * NOTE: I like the idea of a module for the config stuff. ie ifconfig
851 * loads the devconfigure module does its configuring and unloads it.
852 * There's a good 20K of config code hanging around the kernel.
855 int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
857 struct sock *sk = sock->sk;
859 struct net *net = sock_net(sk);
863 err = sock_get_timestamp(sk, (struct timeval __user *)arg);
866 err = sock_get_timestampns(sk, (struct timespec __user *)arg);
871 err = ip_rt_ioctl(net, cmd, (void __user *)arg);
876 err = arp_ioctl(net, cmd, (void __user *)arg);
890 err = devinet_ioctl(net, cmd, (void __user *)arg);
893 if (sk->sk_prot->ioctl)
894 err = sk->sk_prot->ioctl(sk, cmd, arg);
901 EXPORT_SYMBOL(inet_ioctl);
904 static int inet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
906 struct sock *sk = sock->sk;
907 int err = -ENOIOCTLCMD;
909 if (sk->sk_prot->compat_ioctl)
910 err = sk->sk_prot->compat_ioctl(sk, cmd, arg);
916 const struct proto_ops inet_stream_ops = {
918 .owner = THIS_MODULE,
919 .release = inet_release,
921 .connect = inet_stream_connect,
922 .socketpair = sock_no_socketpair,
923 .accept = inet_accept,
924 .getname = inet_getname,
927 .listen = inet_listen,
928 .shutdown = inet_shutdown,
929 .setsockopt = sock_common_setsockopt,
930 .getsockopt = sock_common_getsockopt,
931 .sendmsg = inet_sendmsg,
932 .recvmsg = inet_recvmsg,
933 .mmap = sock_no_mmap,
934 .sendpage = inet_sendpage,
935 .splice_read = tcp_splice_read,
937 .compat_setsockopt = compat_sock_common_setsockopt,
938 .compat_getsockopt = compat_sock_common_getsockopt,
939 .compat_ioctl = inet_compat_ioctl,
942 EXPORT_SYMBOL(inet_stream_ops);
944 const struct proto_ops inet_dgram_ops = {
946 .owner = THIS_MODULE,
947 .release = inet_release,
949 .connect = inet_dgram_connect,
950 .socketpair = sock_no_socketpair,
951 .accept = sock_no_accept,
952 .getname = inet_getname,
955 .listen = sock_no_listen,
956 .shutdown = inet_shutdown,
957 .setsockopt = sock_common_setsockopt,
958 .getsockopt = sock_common_getsockopt,
959 .sendmsg = inet_sendmsg,
960 .recvmsg = inet_recvmsg,
961 .mmap = sock_no_mmap,
962 .sendpage = inet_sendpage,
964 .compat_setsockopt = compat_sock_common_setsockopt,
965 .compat_getsockopt = compat_sock_common_getsockopt,
966 .compat_ioctl = inet_compat_ioctl,
969 EXPORT_SYMBOL(inet_dgram_ops);
972 * For SOCK_RAW sockets; should be the same as inet_dgram_ops but without
975 static const struct proto_ops inet_sockraw_ops = {
977 .owner = THIS_MODULE,
978 .release = inet_release,
980 .connect = inet_dgram_connect,
981 .socketpair = sock_no_socketpair,
982 .accept = sock_no_accept,
983 .getname = inet_getname,
984 .poll = datagram_poll,
986 .listen = sock_no_listen,
987 .shutdown = inet_shutdown,
988 .setsockopt = sock_common_setsockopt,
989 .getsockopt = sock_common_getsockopt,
990 .sendmsg = inet_sendmsg,
991 .recvmsg = inet_recvmsg,
992 .mmap = sock_no_mmap,
993 .sendpage = inet_sendpage,
995 .compat_setsockopt = compat_sock_common_setsockopt,
996 .compat_getsockopt = compat_sock_common_getsockopt,
997 .compat_ioctl = inet_compat_ioctl,
1001 static const struct net_proto_family inet_family_ops = {
1003 .create = inet_create,
1004 .owner = THIS_MODULE,
1007 /* Upon startup we insert all the elements in inetsw_array[] into
1008 * the linked list inetsw.
1010 static struct inet_protosw inetsw_array[] =
1013 .type = SOCK_STREAM,
1014 .protocol = IPPROTO_TCP,
1016 .ops = &inet_stream_ops,
1017 .flags = INET_PROTOSW_PERMANENT |
1023 .protocol = IPPROTO_UDP,
1025 .ops = &inet_dgram_ops,
1026 .flags = INET_PROTOSW_PERMANENT,
1031 .protocol = IPPROTO_ICMP,
1033 .ops = &inet_dgram_ops,
1034 .flags = INET_PROTOSW_REUSE,
1039 .protocol = IPPROTO_IP, /* wild card */
1041 .ops = &inet_sockraw_ops,
1042 .flags = INET_PROTOSW_REUSE,
1046 #define INETSW_ARRAY_LEN ARRAY_SIZE(inetsw_array)
1048 void inet_register_protosw(struct inet_protosw *p)
1050 struct list_head *lh;
1051 struct inet_protosw *answer;
1052 int protocol = p->protocol;
1053 struct list_head *last_perm;
1055 spin_lock_bh(&inetsw_lock);
1057 if (p->type >= SOCK_MAX)
1060 /* If we are trying to override a permanent protocol, bail. */
1061 last_perm = &inetsw[p->type];
1062 list_for_each(lh, &inetsw[p->type]) {
1063 answer = list_entry(lh, struct inet_protosw, list);
1064 /* Check only the non-wild match. */
1065 if ((INET_PROTOSW_PERMANENT & answer->flags) == 0)
1067 if (protocol == answer->protocol)
1072 /* Add the new entry after the last permanent entry if any, so that
1073 * the new entry does not override a permanent entry when matched with
1074 * a wild-card protocol. But it is allowed to override any existing
1075 * non-permanent entry. This means that when we remove this entry, the
1076 * system automatically returns to the old behavior.
1078 list_add_rcu(&p->list, last_perm);
1080 spin_unlock_bh(&inetsw_lock);
1085 pr_err("Attempt to override permanent protocol %d\n", protocol);
1089 pr_err("Ignoring attempt to register invalid socket type %d\n",
1093 EXPORT_SYMBOL(inet_register_protosw);
1095 void inet_unregister_protosw(struct inet_protosw *p)
1097 if (INET_PROTOSW_PERMANENT & p->flags) {
1098 pr_err("Attempt to unregister permanent protocol %d\n",
1101 spin_lock_bh(&inetsw_lock);
1102 list_del_rcu(&p->list);
1103 spin_unlock_bh(&inetsw_lock);
1108 EXPORT_SYMBOL(inet_unregister_protosw);
1111 * Shall we try to damage output packets if routing dev changes?
1114 int sysctl_ip_dynaddr __read_mostly;
1116 static int inet_sk_reselect_saddr(struct sock *sk)
1118 struct inet_sock *inet = inet_sk(sk);
1119 __be32 old_saddr = inet->inet_saddr;
1120 __be32 daddr = inet->inet_daddr;
1124 struct ip_options_rcu *inet_opt;
1126 inet_opt = rcu_dereference_protected(inet->inet_opt,
1127 sock_owned_by_user(sk));
1128 if (inet_opt && inet_opt->opt.srr)
1129 daddr = inet_opt->opt.faddr;
1131 /* Query new route. */
1132 fl4 = &inet->cork.fl.u.ip4;
1133 rt = ip_route_connect(fl4, daddr, 0, RT_CONN_FLAGS(sk),
1134 sk->sk_bound_dev_if, sk->sk_protocol,
1135 inet->inet_sport, inet->inet_dport, sk);
1139 sk_setup_caps(sk, &rt->dst);
1141 new_saddr = fl4->saddr;
1143 if (new_saddr == old_saddr)
1146 if (sysctl_ip_dynaddr > 1) {
1147 pr_info("%s(): shifting inet->saddr from %pI4 to %pI4\n",
1148 __func__, &old_saddr, &new_saddr);
1151 inet->inet_saddr = inet->inet_rcv_saddr = new_saddr;
1154 * XXX The only one ugly spot where we need to
1155 * XXX really change the sockets identity after
1156 * XXX it has entered the hashes. -DaveM
1158 * Besides that, it does not check for connection
1159 * uniqueness. Wait for troubles.
1161 __sk_prot_rehash(sk);
1165 int inet_sk_rebuild_header(struct sock *sk)
1167 struct inet_sock *inet = inet_sk(sk);
1168 struct rtable *rt = (struct rtable *)__sk_dst_check(sk, 0);
1170 struct ip_options_rcu *inet_opt;
1174 /* Route is OK, nothing to do. */
1180 inet_opt = rcu_dereference(inet->inet_opt);
1181 daddr = inet->inet_daddr;
1182 if (inet_opt && inet_opt->opt.srr)
1183 daddr = inet_opt->opt.faddr;
1185 fl4 = &inet->cork.fl.u.ip4;
1186 rt = ip_route_output_ports(sock_net(sk), fl4, sk, daddr, inet->inet_saddr,
1187 inet->inet_dport, inet->inet_sport,
1188 sk->sk_protocol, RT_CONN_FLAGS(sk),
1189 sk->sk_bound_dev_if);
1192 sk_setup_caps(sk, &rt->dst);
1196 /* Routing failed... */
1197 sk->sk_route_caps = 0;
1199 * Other protocols have to map its equivalent state to TCP_SYN_SENT.
1200 * DCCP maps its DCCP_REQUESTING state to TCP_SYN_SENT. -acme
1202 if (!sysctl_ip_dynaddr ||
1203 sk->sk_state != TCP_SYN_SENT ||
1204 (sk->sk_userlocks & SOCK_BINDADDR_LOCK) ||
1205 (err = inet_sk_reselect_saddr(sk)) != 0)
1206 sk->sk_err_soft = -err;
1211 EXPORT_SYMBOL(inet_sk_rebuild_header);
1213 static struct sk_buff *inet_gso_segment(struct sk_buff *skb,
1214 netdev_features_t features)
1216 struct sk_buff *segs = ERR_PTR(-EINVAL);
1217 const struct net_offload *ops;
1218 unsigned int offset = 0;
1219 bool udpfrag, encap;
1226 if (unlikely(skb_shinfo(skb)->gso_type &
1236 SKB_GSO_UDP_TUNNEL |
1237 SKB_GSO_UDP_TUNNEL_CSUM |
1238 SKB_GSO_TUNNEL_REMCSUM |
1242 skb_reset_network_header(skb);
1243 nhoff = skb_network_header(skb) - skb_mac_header(skb);
1244 if (unlikely(!pskb_may_pull(skb, sizeof(*iph))))
1249 if (ihl < sizeof(*iph))
1252 id = ntohs(iph->id);
1253 proto = iph->protocol;
1255 /* Warning: after this point, iph might be no longer valid */
1256 if (unlikely(!pskb_may_pull(skb, ihl)))
1258 __skb_pull(skb, ihl);
1260 encap = SKB_GSO_CB(skb)->encap_level > 0;
1262 features &= skb->dev->hw_enc_features;
1263 SKB_GSO_CB(skb)->encap_level += ihl;
1265 skb_reset_transport_header(skb);
1267 segs = ERR_PTR(-EPROTONOSUPPORT);
1269 if (skb->encapsulation &&
1270 skb_shinfo(skb)->gso_type & (SKB_GSO_SIT|SKB_GSO_IPIP))
1271 udpfrag = proto == IPPROTO_UDP && encap;
1273 udpfrag = proto == IPPROTO_UDP && !skb->encapsulation;
1275 ops = rcu_dereference(inet_offloads[proto]);
1276 if (likely(ops && ops->callbacks.gso_segment))
1277 segs = ops->callbacks.gso_segment(skb, features);
1279 if (IS_ERR_OR_NULL(segs))
1284 iph = (struct iphdr *)(skb_mac_header(skb) + nhoff);
1286 iph->id = htons(id);
1287 iph->frag_off = htons(offset >> 3);
1289 iph->frag_off |= htons(IP_MF);
1290 offset += skb->len - nhoff - ihl;
1292 iph->id = htons(id++);
1294 iph->tot_len = htons(skb->len - nhoff);
1297 skb_reset_inner_headers(skb);
1298 skb->network_header = (u8 *)iph - skb->head;
1299 } while ((skb = skb->next));
1305 static struct sk_buff **inet_gro_receive(struct sk_buff **head,
1306 struct sk_buff *skb)
1308 const struct net_offload *ops;
1309 struct sk_buff **pp = NULL;
1311 const struct iphdr *iph;
1318 off = skb_gro_offset(skb);
1319 hlen = off + sizeof(*iph);
1320 iph = skb_gro_header_fast(skb, off);
1321 if (skb_gro_header_hard(skb, hlen)) {
1322 iph = skb_gro_header_slow(skb, hlen, off);
1327 proto = iph->protocol;
1330 ops = rcu_dereference(inet_offloads[proto]);
1331 if (!ops || !ops->callbacks.gro_receive)
1334 if (*(u8 *)iph != 0x45)
1337 if (unlikely(ip_fast_csum((u8 *)iph, 5)))
1340 id = ntohl(*(__be32 *)&iph->id);
1341 flush = (u16)((ntohl(*(__be32 *)iph) ^ skb_gro_len(skb)) | (id & ~IP_DF));
1344 for (p = *head; p; p = p->next) {
1347 if (!NAPI_GRO_CB(p)->same_flow)
1350 iph2 = (struct iphdr *)(p->data + off);
1351 /* The above works because, with the exception of the top
1352 * (inner most) layer, we only aggregate pkts with the same
1353 * hdr length so all the hdrs we'll need to verify will start
1354 * at the same offset.
1356 if ((iph->protocol ^ iph2->protocol) |
1357 ((__force u32)iph->saddr ^ (__force u32)iph2->saddr) |
1358 ((__force u32)iph->daddr ^ (__force u32)iph2->daddr)) {
1359 NAPI_GRO_CB(p)->same_flow = 0;
1363 /* All fields must match except length and checksum. */
1364 NAPI_GRO_CB(p)->flush |=
1365 (iph->ttl ^ iph2->ttl) |
1366 (iph->tos ^ iph2->tos) |
1367 ((iph->frag_off ^ iph2->frag_off) & htons(IP_DF));
1369 /* Save the IP ID check to be included later when we get to
1370 * the transport layer so only the inner most IP ID is checked.
1371 * This is because some GSO/TSO implementations do not
1372 * correctly increment the IP ID for the outer hdrs.
1374 NAPI_GRO_CB(p)->flush_id =
1375 ((u16)(ntohs(iph2->id) + NAPI_GRO_CB(p)->count) ^ id);
1376 NAPI_GRO_CB(p)->flush |= flush;
1379 NAPI_GRO_CB(skb)->flush |= flush;
1380 skb_set_network_header(skb, off);
1381 /* The above will be needed by the transport layer if there is one
1382 * immediately following this IP hdr.
1385 /* Note : No need to call skb_gro_postpull_rcsum() here,
1386 * as we already checked checksum over ipv4 header was 0
1388 skb_gro_pull(skb, sizeof(*iph));
1389 skb_set_transport_header(skb, skb_gro_offset(skb));
1391 pp = ops->callbacks.gro_receive(head, skb);
1397 NAPI_GRO_CB(skb)->flush |= flush;
1402 int inet_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len)
1404 if (sk->sk_family == AF_INET)
1405 return ip_recv_error(sk, msg, len, addr_len);
1406 #if IS_ENABLED(CONFIG_IPV6)
1407 if (sk->sk_family == AF_INET6)
1408 return pingv6_ops.ipv6_recv_error(sk, msg, len, addr_len);
1413 static int inet_gro_complete(struct sk_buff *skb, int nhoff)
1415 __be16 newlen = htons(skb->len - nhoff);
1416 struct iphdr *iph = (struct iphdr *)(skb->data + nhoff);
1417 const struct net_offload *ops;
1418 int proto = iph->protocol;
1421 if (skb->encapsulation)
1422 skb_set_inner_network_header(skb, nhoff);
1424 csum_replace2(&iph->check, iph->tot_len, newlen);
1425 iph->tot_len = newlen;
1428 ops = rcu_dereference(inet_offloads[proto]);
1429 if (WARN_ON(!ops || !ops->callbacks.gro_complete))
1432 /* Only need to add sizeof(*iph) to get to the next hdr below
1433 * because any hdr with option will have been flushed in
1434 * inet_gro_receive().
1436 err = ops->callbacks.gro_complete(skb, nhoff + sizeof(*iph));
1444 int inet_ctl_sock_create(struct sock **sk, unsigned short family,
1445 unsigned short type, unsigned char protocol,
1448 struct socket *sock;
1449 int rc = sock_create_kern(net, family, type, protocol, &sock);
1453 (*sk)->sk_allocation = GFP_ATOMIC;
1455 * Unhash it so that IP input processing does not even see it,
1456 * we do not wish this socket to see incoming packets.
1458 (*sk)->sk_prot->unhash(*sk);
1462 EXPORT_SYMBOL_GPL(inet_ctl_sock_create);
1464 u64 snmp_get_cpu_field(void __percpu *mib, int cpu, int offt)
1466 return *(((unsigned long *)per_cpu_ptr(mib, cpu)) + offt);
1468 EXPORT_SYMBOL_GPL(snmp_get_cpu_field);
1470 unsigned long snmp_fold_field(void __percpu *mib, int offt)
1472 unsigned long res = 0;
1475 for_each_possible_cpu(i)
1476 res += snmp_get_cpu_field(mib, i, offt);
1479 EXPORT_SYMBOL_GPL(snmp_fold_field);
1481 #if BITS_PER_LONG==32
1483 u64 snmp_get_cpu_field64(void __percpu *mib, int cpu, int offt,
1484 size_t syncp_offset)
1487 struct u64_stats_sync *syncp;
1491 bhptr = per_cpu_ptr(mib, cpu);
1492 syncp = (struct u64_stats_sync *)(bhptr + syncp_offset);
1494 start = u64_stats_fetch_begin_irq(syncp);
1495 v = *(((u64 *)bhptr) + offt);
1496 } while (u64_stats_fetch_retry_irq(syncp, start));
1500 EXPORT_SYMBOL_GPL(snmp_get_cpu_field64);
1502 u64 snmp_fold_field64(void __percpu *mib, int offt, size_t syncp_offset)
1507 for_each_possible_cpu(cpu) {
1508 res += snmp_get_cpu_field64(mib, cpu, offt, syncp_offset);
1512 EXPORT_SYMBOL_GPL(snmp_fold_field64);
1515 #ifdef CONFIG_IP_MULTICAST
1516 static const struct net_protocol igmp_protocol = {
1517 .handler = igmp_rcv,
1522 static const struct net_protocol tcp_protocol = {
1523 .early_demux = tcp_v4_early_demux,
1524 .handler = tcp_v4_rcv,
1525 .err_handler = tcp_v4_err,
1528 .icmp_strict_tag_validation = 1,
1531 static const struct net_protocol udp_protocol = {
1532 .early_demux = udp_v4_early_demux,
1534 .err_handler = udp_err,
1539 static const struct net_protocol icmp_protocol = {
1540 .handler = icmp_rcv,
1541 .err_handler = icmp_err,
1546 static __net_init int ipv4_mib_init_net(struct net *net)
1550 net->mib.tcp_statistics = alloc_percpu(struct tcp_mib);
1551 if (!net->mib.tcp_statistics)
1553 net->mib.ip_statistics = alloc_percpu(struct ipstats_mib);
1554 if (!net->mib.ip_statistics)
1557 for_each_possible_cpu(i) {
1558 struct ipstats_mib *af_inet_stats;
1559 af_inet_stats = per_cpu_ptr(net->mib.ip_statistics, i);
1560 u64_stats_init(&af_inet_stats->syncp);
1563 net->mib.net_statistics = alloc_percpu(struct linux_mib);
1564 if (!net->mib.net_statistics)
1566 net->mib.udp_statistics = alloc_percpu(struct udp_mib);
1567 if (!net->mib.udp_statistics)
1569 net->mib.udplite_statistics = alloc_percpu(struct udp_mib);
1570 if (!net->mib.udplite_statistics)
1571 goto err_udplite_mib;
1572 net->mib.icmp_statistics = alloc_percpu(struct icmp_mib);
1573 if (!net->mib.icmp_statistics)
1575 net->mib.icmpmsg_statistics = kzalloc(sizeof(struct icmpmsg_mib),
1577 if (!net->mib.icmpmsg_statistics)
1578 goto err_icmpmsg_mib;
1584 free_percpu(net->mib.icmp_statistics);
1586 free_percpu(net->mib.udplite_statistics);
1588 free_percpu(net->mib.udp_statistics);
1590 free_percpu(net->mib.net_statistics);
1592 free_percpu(net->mib.ip_statistics);
1594 free_percpu(net->mib.tcp_statistics);
1599 static __net_exit void ipv4_mib_exit_net(struct net *net)
1601 kfree(net->mib.icmpmsg_statistics);
1602 free_percpu(net->mib.icmp_statistics);
1603 free_percpu(net->mib.udplite_statistics);
1604 free_percpu(net->mib.udp_statistics);
1605 free_percpu(net->mib.net_statistics);
1606 free_percpu(net->mib.ip_statistics);
1607 free_percpu(net->mib.tcp_statistics);
1610 static __net_initdata struct pernet_operations ipv4_mib_ops = {
1611 .init = ipv4_mib_init_net,
1612 .exit = ipv4_mib_exit_net,
1615 static int __init init_ipv4_mibs(void)
1617 return register_pernet_subsys(&ipv4_mib_ops);
1620 static __net_init int inet_init_net(struct net *net)
1623 * Set defaults for local port range
1625 seqlock_init(&net->ipv4.ip_local_ports.lock);
1626 net->ipv4.ip_local_ports.range[0] = 32768;
1627 net->ipv4.ip_local_ports.range[1] = 60999;
1629 seqlock_init(&net->ipv4.ping_group_range.lock);
1631 * Sane defaults - nobody may create ping sockets.
1632 * Boot scripts should set this to distro-specific group.
1634 net->ipv4.ping_group_range.range[0] = make_kgid(&init_user_ns, 1);
1635 net->ipv4.ping_group_range.range[1] = make_kgid(&init_user_ns, 0);
1639 static __net_exit void inet_exit_net(struct net *net)
1643 static __net_initdata struct pernet_operations af_inet_ops = {
1644 .init = inet_init_net,
1645 .exit = inet_exit_net,
1648 static int __init init_inet_pernet_ops(void)
1650 return register_pernet_subsys(&af_inet_ops);
1653 static int ipv4_proc_init(void);
1656 * IP protocol layer initialiser
1659 static struct packet_offload ip_packet_offload __read_mostly = {
1660 .type = cpu_to_be16(ETH_P_IP),
1662 .gso_segment = inet_gso_segment,
1663 .gro_receive = inet_gro_receive,
1664 .gro_complete = inet_gro_complete,
1668 static const struct net_offload ipip_offload = {
1670 .gso_segment = inet_gso_segment,
1671 .gro_receive = inet_gro_receive,
1672 .gro_complete = inet_gro_complete,
1676 static int __init ipv4_offload_init(void)
1681 if (udpv4_offload_init() < 0)
1682 pr_crit("%s: Cannot add UDP protocol offload\n", __func__);
1683 if (tcpv4_offload_init() < 0)
1684 pr_crit("%s: Cannot add TCP protocol offload\n", __func__);
1686 dev_add_offload(&ip_packet_offload);
1687 inet_add_offload(&ipip_offload, IPPROTO_IPIP);
1691 fs_initcall(ipv4_offload_init);
1693 static struct packet_type ip_packet_type __read_mostly = {
1694 .type = cpu_to_be16(ETH_P_IP),
1698 static int __init inet_init(void)
1700 struct inet_protosw *q;
1701 struct list_head *r;
1704 sock_skb_cb_check_size(sizeof(struct inet_skb_parm));
1706 rc = proto_register(&tcp_prot, 1);
1710 rc = proto_register(&udp_prot, 1);
1712 goto out_unregister_tcp_proto;
1714 rc = proto_register(&raw_prot, 1);
1716 goto out_unregister_udp_proto;
1718 rc = proto_register(&ping_prot, 1);
1720 goto out_unregister_raw_proto;
1723 * Tell SOCKET that we are alive...
1726 (void)sock_register(&inet_family_ops);
1728 #ifdef CONFIG_SYSCTL
1729 ip_static_sysctl_init();
1733 * Add all the base protocols.
1736 if (inet_add_protocol(&icmp_protocol, IPPROTO_ICMP) < 0)
1737 pr_crit("%s: Cannot add ICMP protocol\n", __func__);
1738 if (inet_add_protocol(&udp_protocol, IPPROTO_UDP) < 0)
1739 pr_crit("%s: Cannot add UDP protocol\n", __func__);
1740 if (inet_add_protocol(&tcp_protocol, IPPROTO_TCP) < 0)
1741 pr_crit("%s: Cannot add TCP protocol\n", __func__);
1742 #ifdef CONFIG_IP_MULTICAST
1743 if (inet_add_protocol(&igmp_protocol, IPPROTO_IGMP) < 0)
1744 pr_crit("%s: Cannot add IGMP protocol\n", __func__);
1747 /* Register the socket-side information for inet_create. */
1748 for (r = &inetsw[0]; r < &inetsw[SOCK_MAX]; ++r)
1751 for (q = inetsw_array; q < &inetsw_array[INETSW_ARRAY_LEN]; ++q)
1752 inet_register_protosw(q);
1755 * Set the ARP module up
1761 * Set the IP module up
1768 /* Setup TCP slab cache for open requests. */
1771 /* Setup UDP memory threshold */
1774 /* Add UDP-Lite (RFC 3828) */
1775 udplite4_register();
1780 * Set the ICMP layer up
1783 if (icmp_init() < 0)
1784 panic("Failed to create the ICMP control socket.\n");
1787 * Initialise the multicast router
1789 #if defined(CONFIG_IP_MROUTE)
1791 pr_crit("%s: Cannot init ipv4 mroute\n", __func__);
1794 if (init_inet_pernet_ops())
1795 pr_crit("%s: Cannot init ipv4 inet pernet ops\n", __func__);
1797 * Initialise per-cpu ipv4 mibs
1800 if (init_ipv4_mibs())
1801 pr_crit("%s: Cannot init ipv4 mibs\n", __func__);
1807 dev_add_pack(&ip_packet_type);
1809 ip_tunnel_core_init();
1814 out_unregister_raw_proto:
1815 proto_unregister(&raw_prot);
1816 out_unregister_udp_proto:
1817 proto_unregister(&udp_prot);
1818 out_unregister_tcp_proto:
1819 proto_unregister(&tcp_prot);
1823 fs_initcall(inet_init);
1825 /* ------------------------------------------------------------------------ */
1827 #ifdef CONFIG_PROC_FS
1828 static int __init ipv4_proc_init(void)
1832 if (raw_proc_init())
1834 if (tcp4_proc_init())
1836 if (udp4_proc_init())
1838 if (ping_proc_init())
1840 if (ip_misc_proc_init())
1857 #else /* CONFIG_PROC_FS */
1858 static int __init ipv4_proc_init(void)
1862 #endif /* CONFIG_PROC_FS */
1864 MODULE_ALIAS_NETPROTO(PF_INET);