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68#include <linux/err.h>
69#include <linux/errno.h>
70#include <linux/types.h>
71#include <linux/socket.h>
72#include <linux/in.h>
73#include <linux/kernel.h>
74#include <linux/module.h>
75#include <linux/sched.h>
76#include <linux/timer.h>
77#include <linux/string.h>
78#include <linux/sockios.h>
79#include <linux/net.h>
80#include <linux/capability.h>
81#include <linux/fcntl.h>
82#include <linux/mm.h>
83#include <linux/interrupt.h>
84#include <linux/stat.h>
85#include <linux/init.h>
86#include <linux/poll.h>
87#include <linux/netfilter_ipv4.h>
88#include <linux/random.h>
89#include <linux/slab.h>
90
91#include <asm/uaccess.h>
92#include <asm/system.h>
93
94#include <linux/inet.h>
95#include <linux/igmp.h>
96#include <linux/inetdevice.h>
97#include <linux/netdevice.h>
98#include <net/checksum.h>
99#include <net/ip.h>
100#include <net/protocol.h>
101#include <net/arp.h>
102#include <net/route.h>
103#include <net/ip_fib.h>
104#include <net/inet_connection_sock.h>
105#include <net/tcp.h>
106#include <net/udp.h>
107#include <net/udplite.h>
108#include <linux/skbuff.h>
109#include <net/sock.h>
110#include <net/raw.h>
111#include <net/icmp.h>
112#include <net/ipip.h>
113#include <net/inet_common.h>
114#include <net/xfrm.h>
115#include <net/net_namespace.h>
116#ifdef CONFIG_IP_MROUTE
117#include <linux/mroute.h>
118#endif
119
120
121
122
123
124static struct list_head inetsw[SOCK_MAX];
125static DEFINE_SPINLOCK(inetsw_lock);
126
127struct ipv4_config ipv4_config;
128EXPORT_SYMBOL(ipv4_config);
129
130
131
132void inet_sock_destruct(struct sock *sk)
133{
134 struct inet_sock *inet = inet_sk(sk);
135
136 __skb_queue_purge(&sk->sk_receive_queue);
137 __skb_queue_purge(&sk->sk_error_queue);
138
139 sk_mem_reclaim(sk);
140
141 if (sk->sk_type == SOCK_STREAM && sk->sk_state != TCP_CLOSE) {
142 pr_err("Attempt to release TCP socket in state %d %p\n",
143 sk->sk_state, sk);
144 return;
145 }
146 if (!sock_flag(sk, SOCK_DEAD)) {
147 pr_err("Attempt to release alive inet socket %p\n", sk);
148 return;
149 }
150
151 WARN_ON(atomic_read(&sk->sk_rmem_alloc));
152 WARN_ON(atomic_read(&sk->sk_wmem_alloc));
153 WARN_ON(sk->sk_wmem_queued);
154 WARN_ON(sk->sk_forward_alloc);
155
156 kfree(inet->opt);
157 dst_release(rcu_dereference_check(sk->sk_dst_cache, 1));
158 sk_refcnt_debug_dec(sk);
159}
160EXPORT_SYMBOL(inet_sock_destruct);
161
162
163
164
165
166
167
168
169
170
171
172static int inet_autobind(struct sock *sk)
173{
174 struct inet_sock *inet;
175
176 lock_sock(sk);
177 inet = inet_sk(sk);
178 if (!inet->inet_num) {
179 if (sk->sk_prot->get_port(sk, 0)) {
180 release_sock(sk);
181 return -EAGAIN;
182 }
183 inet->inet_sport = htons(inet->inet_num);
184 }
185 release_sock(sk);
186 return 0;
187}
188
189
190
191
192int inet_listen(struct socket *sock, int backlog)
193{
194 struct sock *sk = sock->sk;
195 unsigned char old_state;
196 int err;
197
198 lock_sock(sk);
199
200 err = -EINVAL;
201 if (sock->state != SS_UNCONNECTED || sock->type != SOCK_STREAM)
202 goto out;
203
204 old_state = sk->sk_state;
205 if (!((1 << old_state) & (TCPF_CLOSE | TCPF_LISTEN)))
206 goto out;
207
208
209
210
211 if (old_state != TCP_LISTEN) {
212 err = inet_csk_listen_start(sk, backlog);
213 if (err)
214 goto out;
215 }
216 sk->sk_max_ack_backlog = backlog;
217 err = 0;
218
219out:
220 release_sock(sk);
221 return err;
222}
223EXPORT_SYMBOL(inet_listen);
224
225u32 inet_ehash_secret __read_mostly;
226EXPORT_SYMBOL(inet_ehash_secret);
227
228
229
230
231void build_ehash_secret(void)
232{
233 u32 rnd;
234
235 do {
236 get_random_bytes(&rnd, sizeof(rnd));
237 } while (rnd == 0);
238
239 cmpxchg(&inet_ehash_secret, 0, rnd);
240}
241EXPORT_SYMBOL(build_ehash_secret);
242
243static inline int inet_netns_ok(struct net *net, int protocol)
244{
245 int hash;
246 const struct net_protocol *ipprot;
247
248 if (net_eq(net, &init_net))
249 return 1;
250
251 hash = protocol & (MAX_INET_PROTOS - 1);
252 ipprot = rcu_dereference(inet_protos[hash]);
253
254 if (ipprot == NULL)
255
256 return 1;
257 return ipprot->netns_ok;
258}
259
260
261
262
263
264static int inet_create(struct net *net, struct socket *sock, int protocol,
265 int kern)
266{
267 struct sock *sk;
268 struct inet_protosw *answer;
269 struct inet_sock *inet;
270 struct proto *answer_prot;
271 unsigned char answer_flags;
272 char answer_no_check;
273 int try_loading_module = 0;
274 int err;
275
276 if (unlikely(!inet_ehash_secret))
277 if (sock->type != SOCK_RAW && sock->type != SOCK_DGRAM)
278 build_ehash_secret();
279
280 sock->state = SS_UNCONNECTED;
281
282
283lookup_protocol:
284 err = -ESOCKTNOSUPPORT;
285 rcu_read_lock();
286 list_for_each_entry_rcu(answer, &inetsw[sock->type], list) {
287
288 err = 0;
289
290 if (protocol == answer->protocol) {
291 if (protocol != IPPROTO_IP)
292 break;
293 } else {
294
295 if (IPPROTO_IP == protocol) {
296 protocol = answer->protocol;
297 break;
298 }
299 if (IPPROTO_IP == answer->protocol)
300 break;
301 }
302 err = -EPROTONOSUPPORT;
303 }
304
305 if (unlikely(err)) {
306 if (try_loading_module < 2) {
307 rcu_read_unlock();
308
309
310
311
312 if (++try_loading_module == 1)
313 request_module("net-pf-%d-proto-%d-type-%d",
314 PF_INET, protocol, sock->type);
315
316
317
318
319 else
320 request_module("net-pf-%d-proto-%d",
321 PF_INET, protocol);
322 goto lookup_protocol;
323 } else
324 goto out_rcu_unlock;
325 }
326
327 err = -EPERM;
328 if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW))
329 goto out_rcu_unlock;
330
331 err = -EAFNOSUPPORT;
332 if (!inet_netns_ok(net, protocol))
333 goto out_rcu_unlock;
334
335 sock->ops = answer->ops;
336 answer_prot = answer->prot;
337 answer_no_check = answer->no_check;
338 answer_flags = answer->flags;
339 rcu_read_unlock();
340
341 WARN_ON(answer_prot->slab == NULL);
342
343 err = -ENOBUFS;
344 sk = sk_alloc(net, PF_INET, GFP_KERNEL, answer_prot);
345 if (sk == NULL)
346 goto out;
347
348 err = 0;
349 sk->sk_no_check = answer_no_check;
350 if (INET_PROTOSW_REUSE & answer_flags)
351 sk->sk_reuse = 1;
352
353 inet = inet_sk(sk);
354 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
355
356 inet->nodefrag = 0;
357
358 if (SOCK_RAW == sock->type) {
359 inet->inet_num = protocol;
360 if (IPPROTO_RAW == protocol)
361 inet->hdrincl = 1;
362 }
363
364 if (ipv4_config.no_pmtu_disc)
365 inet->pmtudisc = IP_PMTUDISC_DONT;
366 else
367 inet->pmtudisc = IP_PMTUDISC_WANT;
368
369 inet->inet_id = 0;
370
371 sock_init_data(sock, sk);
372
373 sk->sk_destruct = inet_sock_destruct;
374 sk->sk_protocol = protocol;
375 sk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
376
377 inet->uc_ttl = -1;
378 inet->mc_loop = 1;
379 inet->mc_ttl = 1;
380 inet->mc_all = 1;
381 inet->mc_index = 0;
382 inet->mc_list = NULL;
383
384 sk_refcnt_debug_inc(sk);
385
386 if (inet->inet_num) {
387
388
389
390
391
392 inet->inet_sport = htons(inet->inet_num);
393
394 sk->sk_prot->hash(sk);
395 }
396
397 if (sk->sk_prot->init) {
398 err = sk->sk_prot->init(sk);
399 if (err)
400 sk_common_release(sk);
401 }
402out:
403 return err;
404out_rcu_unlock:
405 rcu_read_unlock();
406 goto out;
407}
408
409
410
411
412
413
414
415int inet_release(struct socket *sock)
416{
417 struct sock *sk = sock->sk;
418
419 if (sk) {
420 long timeout;
421
422 sock_rps_reset_flow(sk);
423
424
425 ip_mc_drop_socket(sk);
426
427
428
429
430
431
432
433
434 timeout = 0;
435 if (sock_flag(sk, SOCK_LINGER) &&
436 !(current->flags & PF_EXITING))
437 timeout = sk->sk_lingertime;
438 sock->sk = NULL;
439 sk->sk_prot->close(sk, timeout);
440 }
441 return 0;
442}
443EXPORT_SYMBOL(inet_release);
444
445
446int sysctl_ip_nonlocal_bind __read_mostly;
447EXPORT_SYMBOL(sysctl_ip_nonlocal_bind);
448
449int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
450{
451 struct sockaddr_in *addr = (struct sockaddr_in *)uaddr;
452 struct sock *sk = sock->sk;
453 struct inet_sock *inet = inet_sk(sk);
454 unsigned short snum;
455 int chk_addr_ret;
456 int err;
457
458
459 if (sk->sk_prot->bind) {
460 err = sk->sk_prot->bind(sk, uaddr, addr_len);
461 goto out;
462 }
463 err = -EINVAL;
464 if (addr_len < sizeof(struct sockaddr_in))
465 goto out;
466
467 chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr);
468
469
470
471
472
473
474
475
476 err = -EADDRNOTAVAIL;
477 if (!sysctl_ip_nonlocal_bind &&
478 !(inet->freebind || inet->transparent) &&
479 addr->sin_addr.s_addr != htonl(INADDR_ANY) &&
480 chk_addr_ret != RTN_LOCAL &&
481 chk_addr_ret != RTN_MULTICAST &&
482 chk_addr_ret != RTN_BROADCAST)
483 goto out;
484
485 snum = ntohs(addr->sin_port);
486 err = -EACCES;
487 if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
488 goto out;
489
490
491
492
493
494
495
496
497 lock_sock(sk);
498
499
500 err = -EINVAL;
501 if (sk->sk_state != TCP_CLOSE || inet->inet_num)
502 goto out_release_sock;
503
504 inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr;
505 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
506 inet->inet_saddr = 0;
507
508
509 if (sk->sk_prot->get_port(sk, snum)) {
510 inet->inet_saddr = inet->inet_rcv_saddr = 0;
511 err = -EADDRINUSE;
512 goto out_release_sock;
513 }
514
515 if (inet->inet_rcv_saddr)
516 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
517 if (snum)
518 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
519 inet->inet_sport = htons(inet->inet_num);
520 inet->inet_daddr = 0;
521 inet->inet_dport = 0;
522 sk_dst_reset(sk);
523 err = 0;
524out_release_sock:
525 release_sock(sk);
526out:
527 return err;
528}
529EXPORT_SYMBOL(inet_bind);
530
531int inet_dgram_connect(struct socket *sock, struct sockaddr * uaddr,
532 int addr_len, int flags)
533{
534 struct sock *sk = sock->sk;
535
536 if (addr_len < sizeof(uaddr->sa_family))
537 return -EINVAL;
538 if (uaddr->sa_family == AF_UNSPEC)
539 return sk->sk_prot->disconnect(sk, flags);
540
541 if (!inet_sk(sk)->inet_num && inet_autobind(sk))
542 return -EAGAIN;
543 return sk->sk_prot->connect(sk, (struct sockaddr *)uaddr, addr_len);
544}
545EXPORT_SYMBOL(inet_dgram_connect);
546
547static long inet_wait_for_connect(struct sock *sk, long timeo)
548{
549 DEFINE_WAIT(wait);
550
551 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
552
553
554
555
556
557
558 while ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) {
559 release_sock(sk);
560 timeo = schedule_timeout(timeo);
561 lock_sock(sk);
562 if (signal_pending(current) || !timeo)
563 break;
564 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
565 }
566 finish_wait(sk_sleep(sk), &wait);
567 return timeo;
568}
569
570
571
572
573
574int inet_stream_connect(struct socket *sock, struct sockaddr *uaddr,
575 int addr_len, int flags)
576{
577 struct sock *sk = sock->sk;
578 int err;
579 long timeo;
580
581 if (addr_len < sizeof(uaddr->sa_family))
582 return -EINVAL;
583
584 lock_sock(sk);
585
586 if (uaddr->sa_family == AF_UNSPEC) {
587 err = sk->sk_prot->disconnect(sk, flags);
588 sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED;
589 goto out;
590 }
591
592 switch (sock->state) {
593 default:
594 err = -EINVAL;
595 goto out;
596 case SS_CONNECTED:
597 err = -EISCONN;
598 goto out;
599 case SS_CONNECTING:
600 err = -EALREADY;
601
602 break;
603 case SS_UNCONNECTED:
604 err = -EISCONN;
605 if (sk->sk_state != TCP_CLOSE)
606 goto out;
607
608 err = sk->sk_prot->connect(sk, uaddr, addr_len);
609 if (err < 0)
610 goto out;
611
612 sock->state = SS_CONNECTING;
613
614
615
616
617
618 err = -EINPROGRESS;
619 break;
620 }
621
622 timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
623
624 if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) {
625
626 if (!timeo || !inet_wait_for_connect(sk, timeo))
627 goto out;
628
629 err = sock_intr_errno(timeo);
630 if (signal_pending(current))
631 goto out;
632 }
633
634
635
636
637 if (sk->sk_state == TCP_CLOSE)
638 goto sock_error;
639
640
641
642
643
644
645 sock->state = SS_CONNECTED;
646 err = 0;
647out:
648 release_sock(sk);
649 return err;
650
651sock_error:
652 err = sock_error(sk) ? : -ECONNABORTED;
653 sock->state = SS_UNCONNECTED;
654 if (sk->sk_prot->disconnect(sk, flags))
655 sock->state = SS_DISCONNECTING;
656 goto out;
657}
658EXPORT_SYMBOL(inet_stream_connect);
659
660
661
662
663
664int inet_accept(struct socket *sock, struct socket *newsock, int flags)
665{
666 struct sock *sk1 = sock->sk;
667 int err = -EINVAL;
668 struct sock *sk2 = sk1->sk_prot->accept(sk1, flags, &err);
669
670 if (!sk2)
671 goto do_err;
672
673 lock_sock(sk2);
674
675 WARN_ON(!((1 << sk2->sk_state) &
676 (TCPF_ESTABLISHED | TCPF_CLOSE_WAIT | TCPF_CLOSE)));
677
678 sock_graft(sk2, newsock);
679
680 newsock->state = SS_CONNECTED;
681 err = 0;
682 release_sock(sk2);
683do_err:
684 return err;
685}
686EXPORT_SYMBOL(inet_accept);
687
688
689
690
691
692int inet_getname(struct socket *sock, struct sockaddr *uaddr,
693 int *uaddr_len, int peer)
694{
695 struct sock *sk = sock->sk;
696 struct inet_sock *inet = inet_sk(sk);
697 DECLARE_SOCKADDR(struct sockaddr_in *, sin, uaddr);
698
699 sin->sin_family = AF_INET;
700 if (peer) {
701 if (!inet->inet_dport ||
702 (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
703 peer == 1))
704 return -ENOTCONN;
705 sin->sin_port = inet->inet_dport;
706 sin->sin_addr.s_addr = inet->inet_daddr;
707 } else {
708 __be32 addr = inet->inet_rcv_saddr;
709 if (!addr)
710 addr = inet->inet_saddr;
711 sin->sin_port = inet->inet_sport;
712 sin->sin_addr.s_addr = addr;
713 }
714 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
715 *uaddr_len = sizeof(*sin);
716 return 0;
717}
718EXPORT_SYMBOL(inet_getname);
719
720int inet_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
721 size_t size)
722{
723 struct sock *sk = sock->sk;
724
725 sock_rps_record_flow(sk);
726
727
728 if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind &&
729 inet_autobind(sk))
730 return -EAGAIN;
731
732 return sk->sk_prot->sendmsg(iocb, sk, msg, size);
733}
734EXPORT_SYMBOL(inet_sendmsg);
735
736ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset,
737 size_t size, int flags)
738{
739 struct sock *sk = sock->sk;
740
741 sock_rps_record_flow(sk);
742
743
744 if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind &&
745 inet_autobind(sk))
746 return -EAGAIN;
747
748 if (sk->sk_prot->sendpage)
749 return sk->sk_prot->sendpage(sk, page, offset, size, flags);
750 return sock_no_sendpage(sock, page, offset, size, flags);
751}
752EXPORT_SYMBOL(inet_sendpage);
753
754int inet_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
755 size_t size, int flags)
756{
757 struct sock *sk = sock->sk;
758 int addr_len = 0;
759 int err;
760
761 sock_rps_record_flow(sk);
762
763 err = sk->sk_prot->recvmsg(iocb, sk, msg, size, flags & MSG_DONTWAIT,
764 flags & ~MSG_DONTWAIT, &addr_len);
765 if (err >= 0)
766 msg->msg_namelen = addr_len;
767 return err;
768}
769EXPORT_SYMBOL(inet_recvmsg);
770
771int inet_shutdown(struct socket *sock, int how)
772{
773 struct sock *sk = sock->sk;
774 int err = 0;
775
776
777
778
779 how++;
780
781
782 if ((how & ~SHUTDOWN_MASK) || !how)
783 return -EINVAL;
784
785 lock_sock(sk);
786 if (sock->state == SS_CONNECTING) {
787 if ((1 << sk->sk_state) &
788 (TCPF_SYN_SENT | TCPF_SYN_RECV | TCPF_CLOSE))
789 sock->state = SS_DISCONNECTING;
790 else
791 sock->state = SS_CONNECTED;
792 }
793
794 switch (sk->sk_state) {
795 case TCP_CLOSE:
796 err = -ENOTCONN;
797
798
799 default:
800 sk->sk_shutdown |= how;
801 if (sk->sk_prot->shutdown)
802 sk->sk_prot->shutdown(sk, how);
803 break;
804
805
806
807
808
809 case TCP_LISTEN:
810 if (!(how & RCV_SHUTDOWN))
811 break;
812
813 case TCP_SYN_SENT:
814 err = sk->sk_prot->disconnect(sk, O_NONBLOCK);
815 sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED;
816 break;
817 }
818
819
820 sk->sk_state_change(sk);
821 release_sock(sk);
822 return err;
823}
824EXPORT_SYMBOL(inet_shutdown);
825
826
827
828
829
830
831
832
833
834
835
836int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
837{
838 struct sock *sk = sock->sk;
839 int err = 0;
840 struct net *net = sock_net(sk);
841
842 switch (cmd) {
843 case SIOCGSTAMP:
844 err = sock_get_timestamp(sk, (struct timeval __user *)arg);
845 break;
846 case SIOCGSTAMPNS:
847 err = sock_get_timestampns(sk, (struct timespec __user *)arg);
848 break;
849 case SIOCADDRT:
850 case SIOCDELRT:
851 case SIOCRTMSG:
852 err = ip_rt_ioctl(net, cmd, (void __user *)arg);
853 break;
854 case SIOCDARP:
855 case SIOCGARP:
856 case SIOCSARP:
857 err = arp_ioctl(net, cmd, (void __user *)arg);
858 break;
859 case SIOCGIFADDR:
860 case SIOCSIFADDR:
861 case SIOCGIFBRDADDR:
862 case SIOCSIFBRDADDR:
863 case SIOCGIFNETMASK:
864 case SIOCSIFNETMASK:
865 case SIOCGIFDSTADDR:
866 case SIOCSIFDSTADDR:
867 case SIOCSIFPFLAGS:
868 case SIOCGIFPFLAGS:
869 case SIOCSIFFLAGS:
870 err = devinet_ioctl(net, cmd, (void __user *)arg);
871 break;
872 default:
873 if (sk->sk_prot->ioctl)
874 err = sk->sk_prot->ioctl(sk, cmd, arg);
875 else
876 err = -ENOIOCTLCMD;
877 break;
878 }
879 return err;
880}
881EXPORT_SYMBOL(inet_ioctl);
882
883#ifdef CONFIG_COMPAT
884int inet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
885{
886 struct sock *sk = sock->sk;
887 int err = -ENOIOCTLCMD;
888
889 if (sk->sk_prot->compat_ioctl)
890 err = sk->sk_prot->compat_ioctl(sk, cmd, arg);
891
892 return err;
893}
894#endif
895
896const struct proto_ops inet_stream_ops = {
897 .family = PF_INET,
898 .owner = THIS_MODULE,
899 .release = inet_release,
900 .bind = inet_bind,
901 .connect = inet_stream_connect,
902 .socketpair = sock_no_socketpair,
903 .accept = inet_accept,
904 .getname = inet_getname,
905 .poll = tcp_poll,
906 .ioctl = inet_ioctl,
907 .listen = inet_listen,
908 .shutdown = inet_shutdown,
909 .setsockopt = sock_common_setsockopt,
910 .getsockopt = sock_common_getsockopt,
911 .sendmsg = inet_sendmsg,
912 .recvmsg = inet_recvmsg,
913 .mmap = sock_no_mmap,
914 .sendpage = inet_sendpage,
915 .splice_read = tcp_splice_read,
916#ifdef CONFIG_COMPAT
917 .compat_setsockopt = compat_sock_common_setsockopt,
918 .compat_getsockopt = compat_sock_common_getsockopt,
919 .compat_ioctl = inet_compat_ioctl,
920#endif
921};
922EXPORT_SYMBOL(inet_stream_ops);
923
924const struct proto_ops inet_dgram_ops = {
925 .family = PF_INET,
926 .owner = THIS_MODULE,
927 .release = inet_release,
928 .bind = inet_bind,
929 .connect = inet_dgram_connect,
930 .socketpair = sock_no_socketpair,
931 .accept = sock_no_accept,
932 .getname = inet_getname,
933 .poll = udp_poll,
934 .ioctl = inet_ioctl,
935 .listen = sock_no_listen,
936 .shutdown = inet_shutdown,
937 .setsockopt = sock_common_setsockopt,
938 .getsockopt = sock_common_getsockopt,
939 .sendmsg = inet_sendmsg,
940 .recvmsg = inet_recvmsg,
941 .mmap = sock_no_mmap,
942 .sendpage = inet_sendpage,
943#ifdef CONFIG_COMPAT
944 .compat_setsockopt = compat_sock_common_setsockopt,
945 .compat_getsockopt = compat_sock_common_getsockopt,
946 .compat_ioctl = inet_compat_ioctl,
947#endif
948};
949EXPORT_SYMBOL(inet_dgram_ops);
950
951
952
953
954
955static const struct proto_ops inet_sockraw_ops = {
956 .family = PF_INET,
957 .owner = THIS_MODULE,
958 .release = inet_release,
959 .bind = inet_bind,
960 .connect = inet_dgram_connect,
961 .socketpair = sock_no_socketpair,
962 .accept = sock_no_accept,
963 .getname = inet_getname,
964 .poll = datagram_poll,
965 .ioctl = inet_ioctl,
966 .listen = sock_no_listen,
967 .shutdown = inet_shutdown,
968 .setsockopt = sock_common_setsockopt,
969 .getsockopt = sock_common_getsockopt,
970 .sendmsg = inet_sendmsg,
971 .recvmsg = inet_recvmsg,
972 .mmap = sock_no_mmap,
973 .sendpage = inet_sendpage,
974#ifdef CONFIG_COMPAT
975 .compat_setsockopt = compat_sock_common_setsockopt,
976 .compat_getsockopt = compat_sock_common_getsockopt,
977 .compat_ioctl = inet_compat_ioctl,
978#endif
979};
980
981static const struct net_proto_family inet_family_ops = {
982 .family = PF_INET,
983 .create = inet_create,
984 .owner = THIS_MODULE,
985};
986
987
988
989
990static struct inet_protosw inetsw_array[] =
991{
992 {
993 .type = SOCK_STREAM,
994 .protocol = IPPROTO_TCP,
995 .prot = &tcp_prot,
996 .ops = &inet_stream_ops,
997 .no_check = 0,
998 .flags = INET_PROTOSW_PERMANENT |
999 INET_PROTOSW_ICSK,
1000 },
1001
1002 {
1003 .type = SOCK_DGRAM,
1004 .protocol = IPPROTO_UDP,
1005 .prot = &udp_prot,
1006 .ops = &inet_dgram_ops,
1007 .no_check = UDP_CSUM_DEFAULT,
1008 .flags = INET_PROTOSW_PERMANENT,
1009 },
1010
1011
1012 {
1013 .type = SOCK_RAW,
1014 .protocol = IPPROTO_IP,
1015 .prot = &raw_prot,
1016 .ops = &inet_sockraw_ops,
1017 .no_check = UDP_CSUM_DEFAULT,
1018 .flags = INET_PROTOSW_REUSE,
1019 }
1020};
1021
1022#define INETSW_ARRAY_LEN ARRAY_SIZE(inetsw_array)
1023
1024void inet_register_protosw(struct inet_protosw *p)
1025{
1026 struct list_head *lh;
1027 struct inet_protosw *answer;
1028 int protocol = p->protocol;
1029 struct list_head *last_perm;
1030
1031 spin_lock_bh(&inetsw_lock);
1032
1033 if (p->type >= SOCK_MAX)
1034 goto out_illegal;
1035
1036
1037 answer = NULL;
1038 last_perm = &inetsw[p->type];
1039 list_for_each(lh, &inetsw[p->type]) {
1040 answer = list_entry(lh, struct inet_protosw, list);
1041
1042
1043 if (INET_PROTOSW_PERMANENT & answer->flags) {
1044 if (protocol == answer->protocol)
1045 break;
1046 last_perm = lh;
1047 }
1048
1049 answer = NULL;
1050 }
1051 if (answer)
1052 goto out_permanent;
1053
1054
1055
1056
1057
1058
1059
1060 list_add_rcu(&p->list, last_perm);
1061out:
1062 spin_unlock_bh(&inetsw_lock);
1063
1064 return;
1065
1066out_permanent:
1067 printk(KERN_ERR "Attempt to override permanent protocol %d.\n",
1068 protocol);
1069 goto out;
1070
1071out_illegal:
1072 printk(KERN_ERR
1073 "Ignoring attempt to register invalid socket type %d.\n",
1074 p->type);
1075 goto out;
1076}
1077EXPORT_SYMBOL(inet_register_protosw);
1078
1079void inet_unregister_protosw(struct inet_protosw *p)
1080{
1081 if (INET_PROTOSW_PERMANENT & p->flags) {
1082 printk(KERN_ERR
1083 "Attempt to unregister permanent protocol %d.\n",
1084 p->protocol);
1085 } else {
1086 spin_lock_bh(&inetsw_lock);
1087 list_del_rcu(&p->list);
1088 spin_unlock_bh(&inetsw_lock);
1089
1090 synchronize_net();
1091 }
1092}
1093EXPORT_SYMBOL(inet_unregister_protosw);
1094
1095
1096
1097
1098
1099int sysctl_ip_dynaddr __read_mostly;
1100
1101static int inet_sk_reselect_saddr(struct sock *sk)
1102{
1103 struct inet_sock *inet = inet_sk(sk);
1104 int err;
1105 struct rtable *rt;
1106 __be32 old_saddr = inet->inet_saddr;
1107 __be32 new_saddr;
1108 __be32 daddr = inet->inet_daddr;
1109
1110 if (inet->opt && inet->opt->srr)
1111 daddr = inet->opt->faddr;
1112
1113
1114 err = ip_route_connect(&rt, daddr, 0,
1115 RT_CONN_FLAGS(sk),
1116 sk->sk_bound_dev_if,
1117 sk->sk_protocol,
1118 inet->inet_sport, inet->inet_dport, sk, 0);
1119 if (err)
1120 return err;
1121
1122 sk_setup_caps(sk, &rt->dst);
1123
1124 new_saddr = rt->rt_src;
1125
1126 if (new_saddr == old_saddr)
1127 return 0;
1128
1129 if (sysctl_ip_dynaddr > 1) {
1130 printk(KERN_INFO "%s(): shifting inet->saddr from %pI4 to %pI4\n",
1131 __func__, &old_saddr, &new_saddr);
1132 }
1133
1134 inet->inet_saddr = inet->inet_rcv_saddr = new_saddr;
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144 __sk_prot_rehash(sk);
1145 return 0;
1146}
1147
1148int inet_sk_rebuild_header(struct sock *sk)
1149{
1150 struct inet_sock *inet = inet_sk(sk);
1151 struct rtable *rt = (struct rtable *)__sk_dst_check(sk, 0);
1152 __be32 daddr;
1153 int err;
1154
1155
1156 if (rt)
1157 return 0;
1158
1159
1160 daddr = inet->inet_daddr;
1161 if (inet->opt && inet->opt->srr)
1162 daddr = inet->opt->faddr;
1163{
1164 struct flowi fl = {
1165 .oif = sk->sk_bound_dev_if,
1166 .mark = sk->sk_mark,
1167 .fl4_dst = daddr,
1168 .fl4_src = inet->inet_saddr,
1169 .fl4_tos = RT_CONN_FLAGS(sk),
1170 .proto = sk->sk_protocol,
1171 .flags = inet_sk_flowi_flags(sk),
1172 .fl_ip_sport = inet->inet_sport,
1173 .fl_ip_dport = inet->inet_dport,
1174 };
1175
1176 security_sk_classify_flow(sk, &fl);
1177 err = ip_route_output_flow(sock_net(sk), &rt, &fl, sk, 0);
1178}
1179 if (!err)
1180 sk_setup_caps(sk, &rt->dst);
1181 else {
1182
1183 sk->sk_route_caps = 0;
1184
1185
1186
1187
1188 if (!sysctl_ip_dynaddr ||
1189 sk->sk_state != TCP_SYN_SENT ||
1190 (sk->sk_userlocks & SOCK_BINDADDR_LOCK) ||
1191 (err = inet_sk_reselect_saddr(sk)) != 0)
1192 sk->sk_err_soft = -err;
1193 }
1194
1195 return err;
1196}
1197EXPORT_SYMBOL(inet_sk_rebuild_header);
1198
1199static int inet_gso_send_check(struct sk_buff *skb)
1200{
1201 struct iphdr *iph;
1202 const struct net_protocol *ops;
1203 int proto;
1204 int ihl;
1205 int err = -EINVAL;
1206
1207 if (unlikely(!pskb_may_pull(skb, sizeof(*iph))))
1208 goto out;
1209
1210 iph = ip_hdr(skb);
1211 ihl = iph->ihl * 4;
1212 if (ihl < sizeof(*iph))
1213 goto out;
1214
1215 if (unlikely(!pskb_may_pull(skb, ihl)))
1216 goto out;
1217
1218 __skb_pull(skb, ihl);
1219 skb_reset_transport_header(skb);
1220 iph = ip_hdr(skb);
1221 proto = iph->protocol & (MAX_INET_PROTOS - 1);
1222 err = -EPROTONOSUPPORT;
1223
1224 rcu_read_lock();
1225 ops = rcu_dereference(inet_protos[proto]);
1226 if (likely(ops && ops->gso_send_check))
1227 err = ops->gso_send_check(skb);
1228 rcu_read_unlock();
1229
1230out:
1231 return err;
1232}
1233
1234static struct sk_buff *inet_gso_segment(struct sk_buff *skb, int features)
1235{
1236 struct sk_buff *segs = ERR_PTR(-EINVAL);
1237 struct iphdr *iph;
1238 const struct net_protocol *ops;
1239 int proto;
1240 int ihl;
1241 int id;
1242 unsigned int offset = 0;
1243
1244 if (!(features & NETIF_F_V4_CSUM))
1245 features &= ~NETIF_F_SG;
1246
1247 if (unlikely(skb_shinfo(skb)->gso_type &
1248 ~(SKB_GSO_TCPV4 |
1249 SKB_GSO_UDP |
1250 SKB_GSO_DODGY |
1251 SKB_GSO_TCP_ECN |
1252 0)))
1253 goto out;
1254
1255 if (unlikely(!pskb_may_pull(skb, sizeof(*iph))))
1256 goto out;
1257
1258 iph = ip_hdr(skb);
1259 ihl = iph->ihl * 4;
1260 if (ihl < sizeof(*iph))
1261 goto out;
1262
1263 if (unlikely(!pskb_may_pull(skb, ihl)))
1264 goto out;
1265
1266 __skb_pull(skb, ihl);
1267 skb_reset_transport_header(skb);
1268 iph = ip_hdr(skb);
1269 id = ntohs(iph->id);
1270 proto = iph->protocol & (MAX_INET_PROTOS - 1);
1271 segs = ERR_PTR(-EPROTONOSUPPORT);
1272
1273 rcu_read_lock();
1274 ops = rcu_dereference(inet_protos[proto]);
1275 if (likely(ops && ops->gso_segment))
1276 segs = ops->gso_segment(skb, features);
1277 rcu_read_unlock();
1278
1279 if (!segs || IS_ERR(segs))
1280 goto out;
1281
1282 skb = segs;
1283 do {
1284 iph = ip_hdr(skb);
1285 if (proto == IPPROTO_UDP) {
1286 iph->id = htons(id);
1287 iph->frag_off = htons(offset >> 3);
1288 if (skb->next != NULL)
1289 iph->frag_off |= htons(IP_MF);
1290 offset += (skb->len - skb->mac_len - iph->ihl * 4);
1291 } else
1292 iph->id = htons(id++);
1293 iph->tot_len = htons(skb->len - skb->mac_len);
1294 iph->check = 0;
1295 iph->check = ip_fast_csum(skb_network_header(skb), iph->ihl);
1296 } while ((skb = skb->next));
1297
1298out:
1299 return segs;
1300}
1301
1302static struct sk_buff **inet_gro_receive(struct sk_buff **head,
1303 struct sk_buff *skb)
1304{
1305 const struct net_protocol *ops;
1306 struct sk_buff **pp = NULL;
1307 struct sk_buff *p;
1308 struct iphdr *iph;
1309 unsigned int hlen;
1310 unsigned int off;
1311 unsigned int id;
1312 int flush = 1;
1313 int proto;
1314
1315 off = skb_gro_offset(skb);
1316 hlen = off + sizeof(*iph);
1317 iph = skb_gro_header_fast(skb, off);
1318 if (skb_gro_header_hard(skb, hlen)) {
1319 iph = skb_gro_header_slow(skb, hlen, off);
1320 if (unlikely(!iph))
1321 goto out;
1322 }
1323
1324 proto = iph->protocol & (MAX_INET_PROTOS - 1);
1325
1326 rcu_read_lock();
1327 ops = rcu_dereference(inet_protos[proto]);
1328 if (!ops || !ops->gro_receive)
1329 goto out_unlock;
1330
1331 if (*(u8 *)iph != 0x45)
1332 goto out_unlock;
1333
1334 if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl)))
1335 goto out_unlock;
1336
1337 id = ntohl(*(__be32 *)&iph->id);
1338 flush = (u16)((ntohl(*(__be32 *)iph) ^ skb_gro_len(skb)) | (id ^ IP_DF));
1339 id >>= 16;
1340
1341 for (p = *head; p; p = p->next) {
1342 struct iphdr *iph2;
1343
1344 if (!NAPI_GRO_CB(p)->same_flow)
1345 continue;
1346
1347 iph2 = ip_hdr(p);
1348
1349 if ((iph->protocol ^ iph2->protocol) |
1350 (iph->tos ^ iph2->tos) |
1351 ((__force u32)iph->saddr ^ (__force u32)iph2->saddr) |
1352 ((__force u32)iph->daddr ^ (__force u32)iph2->daddr)) {
1353 NAPI_GRO_CB(p)->same_flow = 0;
1354 continue;
1355 }
1356
1357
1358 NAPI_GRO_CB(p)->flush |=
1359 (iph->ttl ^ iph2->ttl) |
1360 ((u16)(ntohs(iph2->id) + NAPI_GRO_CB(p)->count) ^ id);
1361
1362 NAPI_GRO_CB(p)->flush |= flush;
1363 }
1364
1365 NAPI_GRO_CB(skb)->flush |= flush;
1366 skb_gro_pull(skb, sizeof(*iph));
1367 skb_set_transport_header(skb, skb_gro_offset(skb));
1368
1369 pp = ops->gro_receive(head, skb);
1370
1371out_unlock:
1372 rcu_read_unlock();
1373
1374out:
1375 NAPI_GRO_CB(skb)->flush |= flush;
1376
1377 return pp;
1378}
1379
1380static int inet_gro_complete(struct sk_buff *skb)
1381{
1382 const struct net_protocol *ops;
1383 struct iphdr *iph = ip_hdr(skb);
1384 int proto = iph->protocol & (MAX_INET_PROTOS - 1);
1385 int err = -ENOSYS;
1386 __be16 newlen = htons(skb->len - skb_network_offset(skb));
1387
1388 csum_replace2(&iph->check, iph->tot_len, newlen);
1389 iph->tot_len = newlen;
1390
1391 rcu_read_lock();
1392 ops = rcu_dereference(inet_protos[proto]);
1393 if (WARN_ON(!ops || !ops->gro_complete))
1394 goto out_unlock;
1395
1396 err = ops->gro_complete(skb);
1397
1398out_unlock:
1399 rcu_read_unlock();
1400
1401 return err;
1402}
1403
1404int inet_ctl_sock_create(struct sock **sk, unsigned short family,
1405 unsigned short type, unsigned char protocol,
1406 struct net *net)
1407{
1408 struct socket *sock;
1409 int rc = sock_create_kern(family, type, protocol, &sock);
1410
1411 if (rc == 0) {
1412 *sk = sock->sk;
1413 (*sk)->sk_allocation = GFP_ATOMIC;
1414
1415
1416
1417
1418 (*sk)->sk_prot->unhash(*sk);
1419
1420 sk_change_net(*sk, net);
1421 }
1422 return rc;
1423}
1424EXPORT_SYMBOL_GPL(inet_ctl_sock_create);
1425
1426unsigned long snmp_fold_field(void __percpu *mib[], int offt)
1427{
1428 unsigned long res = 0;
1429 int i;
1430
1431 for_each_possible_cpu(i) {
1432 res += *(((unsigned long *) per_cpu_ptr(mib[0], i)) + offt);
1433 res += *(((unsigned long *) per_cpu_ptr(mib[1], i)) + offt);
1434 }
1435 return res;
1436}
1437EXPORT_SYMBOL_GPL(snmp_fold_field);
1438
1439#if BITS_PER_LONG==32
1440
1441u64 snmp_fold_field64(void __percpu *mib[], int offt, size_t syncp_offset)
1442{
1443 u64 res = 0;
1444 int cpu;
1445
1446 for_each_possible_cpu(cpu) {
1447 void *bhptr, *userptr;
1448 struct u64_stats_sync *syncp;
1449 u64 v_bh, v_user;
1450 unsigned int start;
1451
1452
1453 bhptr = per_cpu_ptr(SNMP_STAT_BHPTR(mib), cpu);
1454 syncp = (struct u64_stats_sync *)(bhptr + syncp_offset);
1455 do {
1456 start = u64_stats_fetch_begin_bh(syncp);
1457 v_bh = *(((u64 *) bhptr) + offt);
1458 } while (u64_stats_fetch_retry_bh(syncp, start));
1459
1460
1461 userptr = per_cpu_ptr(SNMP_STAT_USRPTR(mib), cpu);
1462 syncp = (struct u64_stats_sync *)(userptr + syncp_offset);
1463 do {
1464 start = u64_stats_fetch_begin(syncp);
1465 v_user = *(((u64 *) userptr) + offt);
1466 } while (u64_stats_fetch_retry(syncp, start));
1467
1468 res += v_bh + v_user;
1469 }
1470 return res;
1471}
1472EXPORT_SYMBOL_GPL(snmp_fold_field64);
1473#endif
1474
1475int snmp_mib_init(void __percpu *ptr[2], size_t mibsize, size_t align)
1476{
1477 BUG_ON(ptr == NULL);
1478 ptr[0] = __alloc_percpu(mibsize, align);
1479 if (!ptr[0])
1480 goto err0;
1481 ptr[1] = __alloc_percpu(mibsize, align);
1482 if (!ptr[1])
1483 goto err1;
1484 return 0;
1485err1:
1486 free_percpu(ptr[0]);
1487 ptr[0] = NULL;
1488err0:
1489 return -ENOMEM;
1490}
1491EXPORT_SYMBOL_GPL(snmp_mib_init);
1492
1493void snmp_mib_free(void __percpu *ptr[2])
1494{
1495 BUG_ON(ptr == NULL);
1496 free_percpu(ptr[0]);
1497 free_percpu(ptr[1]);
1498 ptr[0] = ptr[1] = NULL;
1499}
1500EXPORT_SYMBOL_GPL(snmp_mib_free);
1501
1502#ifdef CONFIG_IP_MULTICAST
1503static const struct net_protocol igmp_protocol = {
1504 .handler = igmp_rcv,
1505 .netns_ok = 1,
1506};
1507#endif
1508
1509static const struct net_protocol tcp_protocol = {
1510 .handler = tcp_v4_rcv,
1511 .err_handler = tcp_v4_err,
1512 .gso_send_check = tcp_v4_gso_send_check,
1513 .gso_segment = tcp_tso_segment,
1514 .gro_receive = tcp4_gro_receive,
1515 .gro_complete = tcp4_gro_complete,
1516 .no_policy = 1,
1517 .netns_ok = 1,
1518};
1519
1520static const struct net_protocol udp_protocol = {
1521 .handler = udp_rcv,
1522 .err_handler = udp_err,
1523 .gso_send_check = udp4_ufo_send_check,
1524 .gso_segment = udp4_ufo_fragment,
1525 .no_policy = 1,
1526 .netns_ok = 1,
1527};
1528
1529static const struct net_protocol icmp_protocol = {
1530 .handler = icmp_rcv,
1531 .no_policy = 1,
1532 .netns_ok = 1,
1533};
1534
1535static __net_init int ipv4_mib_init_net(struct net *net)
1536{
1537 if (snmp_mib_init((void __percpu **)net->mib.tcp_statistics,
1538 sizeof(struct tcp_mib),
1539 __alignof__(struct tcp_mib)) < 0)
1540 goto err_tcp_mib;
1541 if (snmp_mib_init((void __percpu **)net->mib.ip_statistics,
1542 sizeof(struct ipstats_mib),
1543 __alignof__(struct ipstats_mib)) < 0)
1544 goto err_ip_mib;
1545 if (snmp_mib_init((void __percpu **)net->mib.net_statistics,
1546 sizeof(struct linux_mib),
1547 __alignof__(struct linux_mib)) < 0)
1548 goto err_net_mib;
1549 if (snmp_mib_init((void __percpu **)net->mib.udp_statistics,
1550 sizeof(struct udp_mib),
1551 __alignof__(struct udp_mib)) < 0)
1552 goto err_udp_mib;
1553 if (snmp_mib_init((void __percpu **)net->mib.udplite_statistics,
1554 sizeof(struct udp_mib),
1555 __alignof__(struct udp_mib)) < 0)
1556 goto err_udplite_mib;
1557 if (snmp_mib_init((void __percpu **)net->mib.icmp_statistics,
1558 sizeof(struct icmp_mib),
1559 __alignof__(struct icmp_mib)) < 0)
1560 goto err_icmp_mib;
1561 if (snmp_mib_init((void __percpu **)net->mib.icmpmsg_statistics,
1562 sizeof(struct icmpmsg_mib),
1563 __alignof__(struct icmpmsg_mib)) < 0)
1564 goto err_icmpmsg_mib;
1565
1566 tcp_mib_init(net);
1567 return 0;
1568
1569err_icmpmsg_mib:
1570 snmp_mib_free((void __percpu **)net->mib.icmp_statistics);
1571err_icmp_mib:
1572 snmp_mib_free((void __percpu **)net->mib.udplite_statistics);
1573err_udplite_mib:
1574 snmp_mib_free((void __percpu **)net->mib.udp_statistics);
1575err_udp_mib:
1576 snmp_mib_free((void __percpu **)net->mib.net_statistics);
1577err_net_mib:
1578 snmp_mib_free((void __percpu **)net->mib.ip_statistics);
1579err_ip_mib:
1580 snmp_mib_free((void __percpu **)net->mib.tcp_statistics);
1581err_tcp_mib:
1582 return -ENOMEM;
1583}
1584
1585static __net_exit void ipv4_mib_exit_net(struct net *net)
1586{
1587 snmp_mib_free((void __percpu **)net->mib.icmpmsg_statistics);
1588 snmp_mib_free((void __percpu **)net->mib.icmp_statistics);
1589 snmp_mib_free((void __percpu **)net->mib.udplite_statistics);
1590 snmp_mib_free((void __percpu **)net->mib.udp_statistics);
1591 snmp_mib_free((void __percpu **)net->mib.net_statistics);
1592 snmp_mib_free((void __percpu **)net->mib.ip_statistics);
1593 snmp_mib_free((void __percpu **)net->mib.tcp_statistics);
1594}
1595
1596static __net_initdata struct pernet_operations ipv4_mib_ops = {
1597 .init = ipv4_mib_init_net,
1598 .exit = ipv4_mib_exit_net,
1599};
1600
1601static int __init init_ipv4_mibs(void)
1602{
1603 return register_pernet_subsys(&ipv4_mib_ops);
1604}
1605
1606static int ipv4_proc_init(void);
1607
1608
1609
1610
1611
1612static struct packet_type ip_packet_type __read_mostly = {
1613 .type = cpu_to_be16(ETH_P_IP),
1614 .func = ip_rcv,
1615 .gso_send_check = inet_gso_send_check,
1616 .gso_segment = inet_gso_segment,
1617 .gro_receive = inet_gro_receive,
1618 .gro_complete = inet_gro_complete,
1619};
1620
1621static int __init inet_init(void)
1622{
1623 struct sk_buff *dummy_skb;
1624 struct inet_protosw *q;
1625 struct list_head *r;
1626 int rc = -EINVAL;
1627
1628 BUILD_BUG_ON(sizeof(struct inet_skb_parm) > sizeof(dummy_skb->cb));
1629
1630 sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL);
1631 if (!sysctl_local_reserved_ports)
1632 goto out;
1633
1634 rc = proto_register(&tcp_prot, 1);
1635 if (rc)
1636 goto out_free_reserved_ports;
1637
1638 rc = proto_register(&udp_prot, 1);
1639 if (rc)
1640 goto out_unregister_tcp_proto;
1641
1642 rc = proto_register(&raw_prot, 1);
1643 if (rc)
1644 goto out_unregister_udp_proto;
1645
1646
1647
1648
1649
1650 (void)sock_register(&inet_family_ops);
1651
1652#ifdef CONFIG_SYSCTL
1653 ip_static_sysctl_init();
1654#endif
1655
1656
1657
1658
1659
1660 if (inet_add_protocol(&icmp_protocol, IPPROTO_ICMP) < 0)
1661 printk(KERN_CRIT "inet_init: Cannot add ICMP protocol\n");
1662 if (inet_add_protocol(&udp_protocol, IPPROTO_UDP) < 0)
1663 printk(KERN_CRIT "inet_init: Cannot add UDP protocol\n");
1664 if (inet_add_protocol(&tcp_protocol, IPPROTO_TCP) < 0)
1665 printk(KERN_CRIT "inet_init: Cannot add TCP protocol\n");
1666#ifdef CONFIG_IP_MULTICAST
1667 if (inet_add_protocol(&igmp_protocol, IPPROTO_IGMP) < 0)
1668 printk(KERN_CRIT "inet_init: Cannot add IGMP protocol\n");
1669#endif
1670
1671
1672 for (r = &inetsw[0]; r < &inetsw[SOCK_MAX]; ++r)
1673 INIT_LIST_HEAD(r);
1674
1675 for (q = inetsw_array; q < &inetsw_array[INETSW_ARRAY_LEN]; ++q)
1676 inet_register_protosw(q);
1677
1678
1679
1680
1681
1682 arp_init();
1683
1684
1685
1686
1687
1688 ip_init();
1689
1690 tcp_v4_init();
1691
1692
1693 tcp_init();
1694
1695
1696 udp_init();
1697
1698
1699 udplite4_register();
1700
1701
1702
1703
1704
1705 if (icmp_init() < 0)
1706 panic("Failed to create the ICMP control socket.\n");
1707
1708
1709
1710
1711#if defined(CONFIG_IP_MROUTE)
1712 if (ip_mr_init())
1713 printk(KERN_CRIT "inet_init: Cannot init ipv4 mroute\n");
1714#endif
1715
1716
1717
1718
1719 if (init_ipv4_mibs())
1720 printk(KERN_CRIT "inet_init: Cannot init ipv4 mibs\n");
1721
1722 ipv4_proc_init();
1723
1724 ipfrag_init();
1725
1726 dev_add_pack(&ip_packet_type);
1727
1728 rc = 0;
1729out:
1730 return rc;
1731out_unregister_udp_proto:
1732 proto_unregister(&udp_prot);
1733out_unregister_tcp_proto:
1734 proto_unregister(&tcp_prot);
1735out_free_reserved_ports:
1736 kfree(sysctl_local_reserved_ports);
1737 goto out;
1738}
1739
1740fs_initcall(inet_init);
1741
1742
1743
1744#ifdef CONFIG_PROC_FS
1745static int __init ipv4_proc_init(void)
1746{
1747 int rc = 0;
1748
1749 if (raw_proc_init())
1750 goto out_raw;
1751 if (tcp4_proc_init())
1752 goto out_tcp;
1753 if (udp4_proc_init())
1754 goto out_udp;
1755 if (ip_misc_proc_init())
1756 goto out_misc;
1757out:
1758 return rc;
1759out_misc:
1760 udp4_proc_exit();
1761out_udp:
1762 tcp4_proc_exit();
1763out_tcp:
1764 raw_proc_exit();
1765out_raw:
1766 rc = -ENOMEM;
1767 goto out;
1768}
1769
1770#else
1771static int __init ipv4_proc_init(void)
1772{
1773 return 0;
1774}
1775#endif
1776
1777MODULE_ALIAS_NETPROTO(PF_INET);
1778
1779