This source file includes following definitions.
- sk_inuse
- get_new_socknum
- put_sock
- remove_sock
- destroy_sock
- inet_fcntl
- inet_setsockopt
- inet_getsockopt
- inet_autobind
- inet_listen
- def_callback1
- def_callback2
- def_callback3
- inet_create
- inet_dup
- inet_release
- inet_bind
- inet_connect
- inet_socketpair
- inet_accept
- inet_getname
- inet_recvmsg
- inet_sendmsg
- inet_shutdown
- inet_select
- inet_ioctl
- get_sock
- get_sock_raw
- get_sock_mcast
- inet_proto_init
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58 #include <linux/config.h>
59 #include <linux/errno.h>
60 #include <linux/types.h>
61 #include <linux/socket.h>
62 #include <linux/in.h>
63 #include <linux/kernel.h>
64 #include <linux/major.h>
65 #include <linux/sched.h>
66 #include <linux/timer.h>
67 #include <linux/string.h>
68 #include <linux/sockios.h>
69 #include <linux/net.h>
70 #include <linux/fcntl.h>
71 #include <linux/mm.h>
72 #include <linux/interrupt.h>
73 #include <linux/proc_fs.h>
74 #include <linux/stat.h>
75
76 #include <asm/segment.h>
77 #include <asm/system.h>
78
79 #include <linux/inet.h>
80 #include <linux/netdevice.h>
81 #include <net/ip.h>
82 #include <net/protocol.h>
83 #include <net/arp.h>
84 #include <net/rarp.h>
85 #include <net/route.h>
86 #include <net/tcp.h>
87 #include <net/udp.h>
88 #include <linux/skbuff.h>
89 #include <net/sock.h>
90 #include <net/raw.h>
91 #include <net/icmp.h>
92 #include <linux/ip_fw.h>
93 #ifdef CONFIG_IP_ALIAS
94 #include <net/ip_alias.h>
95 #endif
96 #ifdef CONFIG_KERNELD
97 #include <linux/kerneld.h>
98 #endif
99
100 #define min(a,b) ((a)<(b)?(a):(b))
101
102 extern struct proto packet_prot;
103 extern int raw_get_info(char *, char **, off_t, int, int);
104 extern int snmp_get_info(char *, char **, off_t, int, int);
105 extern int afinet_get_info(char *, char **, off_t, int, int);
106 extern int tcp_get_info(char *, char **, off_t, int, int);
107 extern int udp_get_info(char *, char **, off_t, int, int);
108
109 int (*rarp_ioctl_hook)(unsigned int,void*) = NULL;
110
111
112
113
114
115 static int sk_inuse(struct proto *prot, int num)
116 {
117 struct sock *sk;
118
119 for(sk = prot->sock_array[num & (SOCK_ARRAY_SIZE -1 )];
120 sk != NULL; sk=sk->next)
121 {
122 if (sk->num == num)
123 return(1);
124 }
125 return(0);
126 }
127
128
129
130
131
132
133 unsigned short get_new_socknum(struct proto *prot, unsigned short base)
134 {
135 static int start=0;
136
137
138
139
140
141
142 int i, j;
143 int best = 0;
144 int size = 32767;
145 struct sock *sk;
146
147 if (base == 0)
148 base = PROT_SOCK+1+(start % 1024);
149 if (base <= PROT_SOCK)
150 {
151 base += PROT_SOCK+(start % 1024);
152 }
153
154
155
156
157
158 for(i=0; i < SOCK_ARRAY_SIZE; i++)
159 {
160 j = 0;
161 sk = prot->sock_array[(i+base+1) &(SOCK_ARRAY_SIZE -1)];
162 while(sk != NULL)
163 {
164 sk = sk->next;
165 j++;
166 }
167 if (j == 0)
168 {
169 start =(i+1+start )%1024;
170 return(i+base+1);
171 }
172 if (j < size)
173 {
174 best = i;
175 size = j;
176 }
177 }
178
179
180
181 while(sk_inuse(prot, base +best+1))
182 {
183 best += SOCK_ARRAY_SIZE;
184 }
185 return(best+base+1);
186 }
187
188
189
190
191
192 void put_sock(unsigned short num, struct sock *sk)
193 {
194 struct sock **skp, *tmp;
195 int mask;
196 unsigned long flags;
197
198 if(sk->type==SOCK_PACKET)
199 return;
200
201 sk->num = num;
202 sk->next = NULL;
203 num = num &(SOCK_ARRAY_SIZE -1);
204
205
206
207
208
209 save_flags(flags);
210 cli();
211
212 sk->prot->inuse += 1;
213 if (sk->prot->highestinuse < sk->prot->inuse)
214 sk->prot->highestinuse = sk->prot->inuse;
215
216 if (sk->prot->sock_array[num] == NULL)
217 {
218 sk->prot->sock_array[num] = sk;
219 restore_flags(flags);
220 return;
221 }
222
223 restore_flags(flags);
224 for(mask = 0xff000000; mask != 0xffffffff; mask = (mask >> 8) | mask)
225 {
226 if ((mask & sk->rcv_saddr) &&
227 (mask & sk->rcv_saddr) != (mask & 0xffffffff))
228 {
229 mask = mask << 8;
230 break;
231 }
232 }
233
234
235
236
237 skp = sk->prot->sock_array + num;
238 cli();
239 while ((tmp = *skp) != NULL) {
240 if (!(tmp->rcv_saddr & mask))
241 break;
242 skp = &tmp->next;
243 }
244 sk->next = tmp;
245 *skp = sk;
246 sti();
247 }
248
249
250
251
252
253 static void remove_sock(struct sock *sk1)
254 {
255 struct sock **p;
256 unsigned long flags;
257
258 if (sk1->type==SOCK_PACKET)
259 return;
260
261 if (!sk1->prot)
262 {
263 NETDEBUG(printk("sock.c: remove_sock: sk1->prot == NULL\n"));
264 return;
265 }
266
267
268 save_flags(flags);
269 cli();
270
271 p=&(sk1->prot->sock_array[sk1->num & (SOCK_ARRAY_SIZE -1)]);
272
273 while(*p!=NULL)
274 {
275 if(*p==sk1)
276 {
277 sk1->prot->inuse--;
278 *p=sk1->next;
279 break;
280 }
281 p=&((*p)->next);
282 }
283 restore_flags(flags);
284 }
285
286
287
288
289
290 void destroy_sock(struct sock *sk)
291 {
292 struct sk_buff *skb;
293
294 lock_sock(sk);
295
296 remove_sock(sk);
297
298
299
300
301
302
303 delete_timer(sk);
304 del_timer(&sk->retransmit_timer);
305
306
307
308
309
310 while ((skb = tcp_dequeue_partial(sk)) != NULL)
311 {
312 IS_SKB(skb);
313 kfree_skb(skb, FREE_WRITE);
314 }
315
316
317
318
319
320 while((skb = skb_dequeue(&sk->write_queue)) != NULL) {
321 IS_SKB(skb);
322 kfree_skb(skb, FREE_WRITE);
323 }
324
325
326
327
328
329 while((skb=skb_dequeue(&sk->receive_queue))!=NULL)
330 {
331
332
333
334
335 if (skb->sk != NULL && skb->sk != sk)
336 {
337 IS_SKB(skb);
338 skb->sk->prot->close(skb->sk, 0);
339 }
340 IS_SKB(skb);
341 kfree_skb(skb, FREE_READ);
342 }
343
344
345
346
347
348 cli();
349 for(skb = sk->send_head; skb != NULL; )
350 {
351 struct sk_buff *skb2;
352
353
354
355
356
357 if (skb->next && skb->prev)
358 {
359 IS_SKB(skb);
360 skb_unlink(skb);
361 }
362 skb->dev = NULL;
363 skb2 = skb->link3;
364 kfree_skb(skb, FREE_WRITE);
365 skb = skb2;
366 }
367 sk->send_head = NULL;
368 sti();
369
370
371
372
373
374 while((skb=skb_dequeue(&sk->back_log))!=NULL)
375 {
376
377 skb->sk = NULL;
378 kfree_skb(skb, FREE_READ);
379 }
380
381
382
383
384
385 if (sk->pair)
386 {
387 sk->pair->prot->close(sk->pair, 0);
388 sk->pair = NULL;
389 }
390
391
392
393
394
395
396
397 if (sk->rmem_alloc == 0 && sk->wmem_alloc == 0)
398 {
399 if(sk->opt)
400 kfree(sk->opt);
401 ip_rt_put(sk->ip_route_cache);
402
403
404
405
406 tcp_cache_zap();
407 kfree_s((void *)sk,sizeof(*sk));
408 }
409 else
410 {
411
412
413 printk("Socket destroy delayed\n");
414 sk->destroy = 1;
415 sk->ack_backlog = 0;
416 release_sock(sk);
417 reset_timer(sk, TIME_DESTROY, SOCK_DESTROY_TIME);
418 }
419 }
420
421
422
423
424
425
426
427 static int inet_fcntl(struct socket *sock, unsigned int cmd, unsigned long arg)
428 {
429 struct sock *sk;
430
431 sk = (struct sock *) sock->data;
432
433 switch(cmd)
434 {
435 case F_SETOWN:
436
437
438
439
440
441 if (!suser() && current->pgrp != -arg &&
442 current->pid != arg) return(-EPERM);
443 sk->proc = arg;
444 return(0);
445 case F_GETOWN:
446 return(sk->proc);
447 default:
448 return(-EINVAL);
449 }
450 }
451
452
453
454
455
456 static int inet_setsockopt(struct socket *sock, int level, int optname,
457 char *optval, int optlen)
458 {
459 struct sock *sk = (struct sock *) sock->data;
460 if (level == SOL_SOCKET)
461 return sock_setsockopt(sk,level,optname,optval,optlen);
462 if (sk->prot->setsockopt==NULL)
463 return(-EOPNOTSUPP);
464 else
465 return sk->prot->setsockopt(sk,level,optname,optval,optlen);
466 }
467
468
469
470
471
472 static int inet_getsockopt(struct socket *sock, int level, int optname,
473 char *optval, int *optlen)
474 {
475 struct sock *sk = (struct sock *) sock->data;
476 if (level == SOL_SOCKET)
477 return sock_getsockopt(sk,level,optname,optval,optlen);
478 if(sk->prot->getsockopt==NULL)
479 return(-EOPNOTSUPP);
480 else
481 return sk->prot->getsockopt(sk,level,optname,optval,optlen);
482 }
483
484
485
486
487
488 static int inet_autobind(struct sock *sk)
489 {
490
491 if (sk->num == 0)
492 {
493 sk->num = get_new_socknum(sk->prot, 0);
494 if (sk->num == 0)
495 return(-EAGAIN);
496 udp_cache_zap();
497 tcp_cache_zap();
498 put_sock(sk->num, sk);
499 sk->dummy_th.source = ntohs(sk->num);
500 }
501 return 0;
502 }
503
504
505
506
507
508 static int inet_listen(struct socket *sock, int backlog)
509 {
510 struct sock *sk = (struct sock *) sock->data;
511
512 if(inet_autobind(sk)!=0)
513 return -EAGAIN;
514
515
516
517
518
519
520
521
522 if ((unsigned) backlog == 0)
523 backlog = 1;
524 if ((unsigned) backlog > SOMAXCONN)
525 backlog = SOMAXCONN;
526 sk->max_ack_backlog = backlog;
527 if (sk->state != TCP_LISTEN)
528 {
529 sk->ack_backlog = 0;
530 sk->state = TCP_LISTEN;
531 }
532 return(0);
533 }
534
535
536
537
538
539
540 static void def_callback1(struct sock *sk)
541 {
542 if(!sk->dead)
543 wake_up_interruptible(sk->sleep);
544 }
545
546 static void def_callback2(struct sock *sk,int len)
547 {
548 if(!sk->dead)
549 {
550 wake_up_interruptible(sk->sleep);
551 sock_wake_async(sk->socket, 1);
552 }
553 }
554
555 static void def_callback3(struct sock *sk)
556 {
557 if(!sk->dead && sk->wmem_alloc*2 <= sk->sndbuf)
558 {
559 wake_up_interruptible(sk->sleep);
560 sock_wake_async(sk->socket, 2);
561 }
562 }
563
564
565
566
567
568
569
570
571 static int inet_create(struct socket *sock, int protocol)
572 {
573 struct sock *sk;
574 struct proto *prot;
575 int err;
576
577 sk = (struct sock *) kmalloc(sizeof(*sk), GFP_KERNEL);
578 if (sk == NULL)
579 return(-ENOBUFS);
580 memset(sk,0,sizeof(*sk));
581
582
583
584 switch(sock->type)
585 {
586 case SOCK_STREAM:
587 case SOCK_SEQPACKET:
588 if (protocol && protocol != IPPROTO_TCP)
589 {
590 kfree_s((void *)sk, sizeof(*sk));
591 return(-EPROTONOSUPPORT);
592 }
593 protocol = IPPROTO_TCP;
594 sk->no_check = TCP_NO_CHECK;
595 prot = &tcp_prot;
596 break;
597
598 case SOCK_DGRAM:
599 if (protocol && protocol != IPPROTO_UDP)
600 {
601 kfree_s((void *)sk, sizeof(*sk));
602 return(-EPROTONOSUPPORT);
603 }
604 protocol = IPPROTO_UDP;
605 sk->no_check = UDP_NO_CHECK;
606 prot=&udp_prot;
607 break;
608
609 case SOCK_RAW:
610 if (!suser())
611 {
612 kfree_s((void *)sk, sizeof(*sk));
613 return(-EPERM);
614 }
615 if (!protocol)
616 {
617 kfree_s((void *)sk, sizeof(*sk));
618 return(-EPROTONOSUPPORT);
619 }
620 prot = &raw_prot;
621 sk->reuse = 1;
622 sk->num = protocol;
623 break;
624
625 case SOCK_PACKET:
626 if (!suser())
627 {
628 kfree_s((void *)sk, sizeof(*sk));
629 return(-EPERM);
630 }
631 if (!protocol)
632 {
633 kfree_s((void *)sk, sizeof(*sk));
634 return(-EPROTONOSUPPORT);
635 }
636 prot = &packet_prot;
637 sk->reuse = 1;
638 sk->num = protocol;
639 break;
640
641 default:
642 kfree_s((void *)sk, sizeof(*sk));
643 return(-ESOCKTNOSUPPORT);
644 }
645 sk->socket = sock;
646 #ifdef CONFIG_TCP_NAGLE_OFF
647 sk->nonagle = 1;
648 #endif
649 sk->type = sock->type;
650 sk->protocol = protocol;
651 sk->allocation = GFP_KERNEL;
652 sk->sndbuf = SK_WMEM_MAX;
653 sk->rcvbuf = SK_RMEM_MAX;
654 sk->rto = TCP_TIMEOUT_INIT;
655 sk->cong_window = 1;
656 sk->priority = 1;
657 sk->state = TCP_CLOSE;
658
659
660 sk->max_unacked = 2048;
661 sk->delay_acks = 1;
662 sk->max_ack_backlog = SOMAXCONN;
663 skb_queue_head_init(&sk->write_queue);
664 skb_queue_head_init(&sk->receive_queue);
665 sk->mtu = 576;
666 sk->prot = prot;
667 sk->sleep = sock->wait;
668 init_timer(&sk->timer);
669 init_timer(&sk->retransmit_timer);
670 sk->timer.data = (unsigned long)sk;
671 sk->timer.function = &net_timer;
672 skb_queue_head_init(&sk->back_log);
673 sock->data =(void *) sk;
674 sk->dummy_th.doff = sizeof(sk->dummy_th)/4;
675 sk->ip_ttl=64;
676 if(sk->type==SOCK_RAW && protocol==IPPROTO_RAW)
677 sk->ip_hdrincl=1;
678 else
679 sk->ip_hdrincl=0;
680 #ifdef CONFIG_IP_MULTICAST
681 sk->ip_mc_loop=1;
682 sk->ip_mc_ttl=1;
683 *sk->ip_mc_name=0;
684 sk->ip_mc_list=NULL;
685 #endif
686
687
688
689
690
691 sk->dummy_th.ack=1;
692 sk->dummy_th.doff=sizeof(struct tcphdr)>>2;
693
694 sk->state_change = def_callback1;
695 sk->data_ready = def_callback2;
696 sk->write_space = def_callback3;
697 sk->error_report = def_callback1;
698
699 if (sk->num)
700 {
701
702
703
704
705
706
707 put_sock(sk->num, sk);
708 sk->dummy_th.source = ntohs(sk->num);
709 }
710
711 if (sk->prot->init)
712 {
713 err = sk->prot->init(sk);
714 if (err != 0)
715 {
716 destroy_sock(sk);
717 return(err);
718 }
719 }
720 return(0);
721 }
722
723
724
725
726
727
728 static int inet_dup(struct socket *newsock, struct socket *oldsock)
729 {
730 return(inet_create(newsock,((struct sock *)(oldsock->data))->protocol));
731 }
732
733
734
735
736
737
738
739 static int inet_release(struct socket *sock, struct socket *peer)
740 {
741 unsigned long timeout;
742 struct sock *sk = (struct sock *) sock->data;
743
744 if (sk == NULL)
745 return(0);
746
747 sk->state_change(sk);
748
749
750
751 #ifdef CONFIG_IP_MULTICAST
752
753 ip_mc_drop_socket(sk);
754 #endif
755
756
757
758
759
760
761
762
763 timeout = 0;
764 if (sk->linger) {
765 timeout = ~0UL;
766 if (!sk->lingertime)
767 timeout = jiffies + HZ*sk->lingertime;
768 }
769 if (current->flags & PF_EXITING)
770 timeout = 0;
771
772 sock->data = NULL;
773 sk->socket = NULL;
774
775 sk->prot->close(sk, timeout);
776 return(0);
777 }
778
779
780 static int inet_bind(struct socket *sock, struct sockaddr *uaddr,
781 int addr_len)
782 {
783 struct sockaddr_in *addr=(struct sockaddr_in *)uaddr;
784 struct sock *sk=(struct sock *)sock->data, *sk2;
785 unsigned short snum = 0 ;
786 int chk_addr_ret;
787
788
789
790
791
792 if(sk->prot->bind)
793 return sk->prot->bind(sk,uaddr, addr_len);
794
795
796 if (sk->state != TCP_CLOSE)
797 return(-EIO);
798 if(addr_len<sizeof(struct sockaddr_in))
799 return -EINVAL;
800
801 if(sock->type != SOCK_RAW)
802 {
803 if (sk->num != 0)
804 return(-EINVAL);
805
806 snum = ntohs(addr->sin_port);
807
808 #ifdef CONFIG_IP_MASQUERADE
809
810
811
812 if(snum>=PORT_MASQ_BEGIN && snum<=PORT_MASQ_END)
813 return -EADDRINUSE;
814 #endif
815
816 if (snum == 0)
817 snum = get_new_socknum(sk->prot, 0);
818 if (snum < PROT_SOCK && !suser())
819 return(-EACCES);
820 }
821
822 chk_addr_ret = ip_chk_addr(addr->sin_addr.s_addr);
823 if (addr->sin_addr.s_addr != 0 && chk_addr_ret != IS_MYADDR && chk_addr_ret != IS_MULTICAST && chk_addr_ret != IS_BROADCAST)
824 return(-EADDRNOTAVAIL);
825
826 if (chk_addr_ret || addr->sin_addr.s_addr == 0)
827 {
828
829
830
831
832
833
834
835
836 sk->rcv_saddr = addr->sin_addr.s_addr;
837 if(chk_addr_ret==IS_MULTICAST||chk_addr_ret==IS_BROADCAST)
838 sk->saddr = 0;
839 else
840 sk->saddr = addr->sin_addr.s_addr;
841 }
842 if(sock->type != SOCK_RAW)
843 {
844
845 cli();
846 for(sk2 = sk->prot->sock_array[snum & (SOCK_ARRAY_SIZE -1)];
847 sk2 != NULL; sk2 = sk2->next)
848 {
849
850
851
852
853 if (sk2->num != snum)
854 continue;
855
856
857
858
859
860
861 if (!sk2->rcv_saddr || !sk->rcv_saddr)
862 {
863
864
865
866 if(sk2->reuse && sk->reuse)
867 continue;
868 sti();
869 return(-EADDRINUSE);
870 }
871
872
873
874
875
876 if (sk2->rcv_saddr != sk->rcv_saddr)
877 continue;
878
879
880
881
882 if (!sk->reuse)
883 {
884 sti();
885 return(-EADDRINUSE);
886 }
887
888
889
890
891
892 if (!sk2->reuse || sk2->state==TCP_LISTEN)
893 {
894 sti();
895 return(-EADDRINUSE);
896 }
897 }
898 sti();
899
900 remove_sock(sk);
901 if(sock->type==SOCK_DGRAM)
902 udp_cache_zap();
903 if(sock->type==SOCK_STREAM)
904 tcp_cache_zap();
905 put_sock(snum, sk);
906 sk->dummy_th.source = ntohs(sk->num);
907 sk->daddr = 0;
908 sk->dummy_th.dest = 0;
909 }
910 ip_rt_put(sk->ip_route_cache);
911 sk->ip_route_cache=NULL;
912 return(0);
913 }
914
915
916
917
918
919
920 static int inet_connect(struct socket *sock, struct sockaddr * uaddr,
921 int addr_len, int flags)
922 {
923 struct sock *sk=(struct sock *)sock->data;
924 int err;
925 sock->conn = NULL;
926
927 if (sock->state == SS_CONNECTING && tcp_connected(sk->state))
928 {
929 sock->state = SS_CONNECTED;
930
931 return 0;
932 }
933
934 if (sock->state == SS_CONNECTING && sk->protocol == IPPROTO_TCP && (flags & O_NONBLOCK))
935 {
936 if(sk->err!=0)
937 return sock_error(sk);
938 return -EALREADY;
939 }
940 if (sock->state != SS_CONNECTING)
941 {
942
943 if(inet_autobind(sk)!=0)
944 return(-EAGAIN);
945 if (sk->prot->connect == NULL)
946 return(-EOPNOTSUPP);
947 err = sk->prot->connect(sk, (struct sockaddr_in *)uaddr, addr_len);
948 if (err < 0)
949 return(err);
950 sock->state = SS_CONNECTING;
951 }
952
953 if (sk->state > TCP_FIN_WAIT2 && sock->state==SS_CONNECTING)
954 {
955 sock->state=SS_UNCONNECTED;
956 return sock_error(sk);
957 }
958
959 if (sk->state != TCP_ESTABLISHED &&(flags & O_NONBLOCK))
960 return(-EINPROGRESS);
961
962 cli();
963 while(sk->state == TCP_SYN_SENT || sk->state == TCP_SYN_RECV)
964 {
965 interruptible_sleep_on(sk->sleep);
966 if (current->signal & ~current->blocked)
967 {
968 sti();
969 return(-ERESTARTSYS);
970 }
971
972
973 if(sk->err && sk->protocol == IPPROTO_TCP)
974 {
975 sock->state = SS_UNCONNECTED;
976 sti();
977 return sock_error(sk);
978 }
979 }
980 sti();
981 sock->state = SS_CONNECTED;
982
983 if (sk->state != TCP_ESTABLISHED && sk->err)
984 {
985 sock->state = SS_UNCONNECTED;
986 return sock_error(sk);
987 }
988 return(0);
989 }
990
991
992 static int inet_socketpair(struct socket *sock1, struct socket *sock2)
993 {
994 return(-EOPNOTSUPP);
995 }
996
997
998
999
1000
1001
1002 static int inet_accept(struct socket *sock, struct socket *newsock, int flags)
1003 {
1004 struct sock *sk1, *sk2;
1005 int err;
1006
1007 sk1 = (struct sock *) sock->data;
1008
1009
1010
1011
1012
1013
1014
1015 if (newsock->data)
1016 {
1017 struct sock *sk=(struct sock *)newsock->data;
1018 newsock->data=NULL;
1019 destroy_sock(sk);
1020 }
1021
1022 if (sk1->prot->accept == NULL)
1023 return(-EOPNOTSUPP);
1024
1025
1026
1027
1028
1029 if (sk1->pair != NULL )
1030 {
1031 sk2 = sk1->pair;
1032 sk1->pair = NULL;
1033 }
1034 else
1035 {
1036 sk2 = sk1->prot->accept(sk1,flags);
1037 if (sk2 == NULL)
1038 {
1039 return sock_error(sk1);
1040 }
1041 }
1042 newsock->data = (void *)sk2;
1043 sk2->sleep = newsock->wait;
1044 sk2->socket = newsock;
1045 newsock->conn = NULL;
1046 if (flags & O_NONBLOCK)
1047 return(0);
1048
1049 cli();
1050 while(sk2->state == TCP_SYN_RECV)
1051 {
1052 interruptible_sleep_on(sk2->sleep);
1053 if (current->signal & ~current->blocked)
1054 {
1055 sti();
1056 sk1->pair = sk2;
1057 sk2->sleep = NULL;
1058 sk2->socket=NULL;
1059 newsock->data = NULL;
1060 return(-ERESTARTSYS);
1061 }
1062 }
1063 sti();
1064
1065 if (sk2->state != TCP_ESTABLISHED && sk2->err > 0)
1066 {
1067 err = sock_error(sk2);
1068 destroy_sock(sk2);
1069 newsock->data = NULL;
1070 return err;
1071 }
1072 newsock->state = SS_CONNECTED;
1073 return(0);
1074 }
1075
1076
1077
1078
1079
1080
1081 static int inet_getname(struct socket *sock, struct sockaddr *uaddr,
1082 int *uaddr_len, int peer)
1083 {
1084 struct sockaddr_in *sin=(struct sockaddr_in *)uaddr;
1085 struct sock *sk;
1086
1087 sin->sin_family = AF_INET;
1088 sk = (struct sock *) sock->data;
1089 if (peer)
1090 {
1091 if (!tcp_connected(sk->state))
1092 return(-ENOTCONN);
1093 sin->sin_port = sk->dummy_th.dest;
1094 sin->sin_addr.s_addr = sk->daddr;
1095 }
1096 else
1097 {
1098 __u32 addr = sk->rcv_saddr;
1099 if (!addr) {
1100 addr = sk->saddr;
1101 if (!addr)
1102 addr = ip_my_addr();
1103 }
1104 sin->sin_port = sk->dummy_th.source;
1105 sin->sin_addr.s_addr = addr;
1106 }
1107 *uaddr_len = sizeof(*sin);
1108 return(0);
1109 }
1110
1111
1112
1113 static int inet_recvmsg(struct socket *sock, struct msghdr *ubuf, int size, int noblock,
1114 int flags, int *addr_len )
1115 {
1116 struct sock *sk = (struct sock *) sock->data;
1117
1118 if (sk->prot->recvmsg == NULL)
1119 return(-EOPNOTSUPP);
1120 if(sk->err)
1121 return sock_error(sk);
1122
1123 if(inet_autobind(sk)!=0)
1124 return(-EAGAIN);
1125 return(sk->prot->recvmsg(sk, ubuf, size, noblock, flags,addr_len));
1126 }
1127
1128
1129 static int inet_sendmsg(struct socket *sock, struct msghdr *msg, int size, int noblock,
1130 int flags)
1131 {
1132 struct sock *sk = (struct sock *) sock->data;
1133 if (sk->shutdown & SEND_SHUTDOWN)
1134 {
1135 send_sig(SIGPIPE, current, 1);
1136 return(-EPIPE);
1137 }
1138 if (sk->prot->sendmsg == NULL)
1139 return(-EOPNOTSUPP);
1140 if(sk->err)
1141 return sock_error(sk);
1142
1143 if(inet_autobind(sk)!=0)
1144 return -EAGAIN;
1145 return(sk->prot->sendmsg(sk, msg, size, noblock, flags));
1146
1147 }
1148
1149
1150 static int inet_shutdown(struct socket *sock, int how)
1151 {
1152 struct sock *sk=(struct sock*)sock->data;
1153
1154
1155
1156
1157
1158 how++;
1159
1160
1161 if ((how & ~SHUTDOWN_MASK) || how==0)
1162 return(-EINVAL);
1163 if (sock->state == SS_CONNECTING && sk->state == TCP_ESTABLISHED)
1164 sock->state = SS_CONNECTED;
1165 if (!sk || !tcp_connected(sk->state))
1166 return(-ENOTCONN);
1167 sk->shutdown |= how;
1168 if (sk->prot->shutdown)
1169 sk->prot->shutdown(sk, how);
1170 return(0);
1171 }
1172
1173
1174 static int inet_select(struct socket *sock, int sel_type, select_table *wait )
1175 {
1176 struct sock *sk=(struct sock *) sock->data;
1177 if (sk->prot->select == NULL)
1178 {
1179 return(0);
1180 }
1181 return(sk->prot->select(sk, sel_type, wait));
1182 }
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194 static int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1195 {
1196 struct sock *sk=(struct sock *)sock->data;
1197 int err;
1198 int pid;
1199
1200 switch(cmd)
1201 {
1202 case FIOSETOWN:
1203 case SIOCSPGRP:
1204 err=verify_area(VERIFY_READ,(int *)arg,sizeof(long));
1205 if(err)
1206 return err;
1207 pid = get_user((int *) arg);
1208
1209 if (current->pid != pid && current->pgrp != -pid && !suser())
1210 return -EPERM;
1211 sk->proc = pid;
1212 return(0);
1213 case FIOGETOWN:
1214 case SIOCGPGRP:
1215 err=verify_area(VERIFY_WRITE,(void *) arg, sizeof(long));
1216 if(err)
1217 return err;
1218 put_fs_long(sk->proc,(int *)arg);
1219 return(0);
1220 case SIOCGSTAMP:
1221 if(sk->stamp.tv_sec==0)
1222 return -ENOENT;
1223 err=verify_area(VERIFY_WRITE,(void *)arg,sizeof(struct timeval));
1224 if(err)
1225 return err;
1226 memcpy_tofs((void *)arg,&sk->stamp,sizeof(struct timeval));
1227 return 0;
1228 case SIOCADDRT:
1229 case SIOCDELRT:
1230 return(ip_rt_ioctl(cmd,(void *) arg));
1231 case SIOCDARP:
1232 case SIOCGARP:
1233 case SIOCSARP:
1234 case OLD_SIOCDARP:
1235 case OLD_SIOCGARP:
1236 case OLD_SIOCSARP:
1237 return(arp_ioctl(cmd,(void *) arg));
1238 case SIOCDRARP:
1239 case SIOCGRARP:
1240 case SIOCSRARP:
1241 #ifdef CONFIG_KERNELD
1242 if (rarp_ioctl_hook == NULL)
1243 request_module("rarp");
1244 #endif
1245 if (rarp_ioctl_hook != NULL)
1246 return(rarp_ioctl_hook(cmd,(void *) arg));
1247 case SIOCGIFCONF:
1248 case SIOCGIFFLAGS:
1249 case SIOCSIFFLAGS:
1250 case SIOCGIFADDR:
1251 case SIOCSIFADDR:
1252 case SIOCADDMULTI:
1253 case SIOCDELMULTI:
1254 case SIOCGIFDSTADDR:
1255 case SIOCSIFDSTADDR:
1256 case SIOCGIFBRDADDR:
1257 case SIOCSIFBRDADDR:
1258 case SIOCGIFNETMASK:
1259 case SIOCSIFNETMASK:
1260 case SIOCGIFMETRIC:
1261 case SIOCSIFMETRIC:
1262 case SIOCGIFMEM:
1263 case SIOCSIFMEM:
1264 case SIOCGIFMTU:
1265 case SIOCSIFMTU:
1266 case SIOCSIFLINK:
1267 case SIOCGIFHWADDR:
1268 case SIOCSIFHWADDR:
1269 case SIOCSIFMAP:
1270 case SIOCGIFMAP:
1271 case SIOCSIFSLAVE:
1272 case SIOCGIFSLAVE:
1273 return(dev_ioctl(cmd,(void *) arg));
1274
1275 default:
1276 if ((cmd >= SIOCDEVPRIVATE) &&
1277 (cmd <= (SIOCDEVPRIVATE + 15)))
1278 return(dev_ioctl(cmd,(void *) arg));
1279
1280 if (sk->prot->ioctl==NULL)
1281 return(-EINVAL);
1282 return(sk->prot->ioctl(sk, cmd, arg));
1283 }
1284
1285 return(0);
1286 }
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297 struct sock *get_sock(struct proto *prot, unsigned short num,
1298 unsigned long raddr,
1299 unsigned short rnum, unsigned long laddr)
1300 {
1301 struct sock *s;
1302 struct sock *result = NULL;
1303 int badness = -1;
1304 unsigned short hnum;
1305
1306 hnum = ntohs(num);
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317 for(s = prot->sock_array[hnum & (SOCK_ARRAY_SIZE - 1)];
1318 s != NULL; s = s->next)
1319 {
1320 int score = 0;
1321
1322 if (s->num != hnum)
1323 continue;
1324
1325 if(s->dead && (s->state == TCP_CLOSE))
1326 continue;
1327
1328 if (s->rcv_saddr) {
1329 if (s->rcv_saddr != laddr)
1330 continue;
1331 score++;
1332 }
1333
1334 if (s->daddr) {
1335 if (s->daddr != raddr)
1336 continue;
1337 score++;
1338 }
1339
1340 if (s->dummy_th.dest) {
1341 if (s->dummy_th.dest != rnum)
1342 continue;
1343 score++;
1344 }
1345
1346 if (score == 3)
1347 return s;
1348
1349 if (score <= badness)
1350 continue;
1351 result = s;
1352 badness = score;
1353 }
1354 return result;
1355 }
1356
1357
1358
1359
1360
1361 struct sock *get_sock_raw(struct sock *sk,
1362 unsigned short num,
1363 unsigned long raddr,
1364 unsigned long laddr)
1365 {
1366 struct sock *s;
1367
1368 s=sk;
1369
1370 for(; s != NULL; s = s->next)
1371 {
1372 if (s->num != num)
1373 continue;
1374 if(s->dead && (s->state == TCP_CLOSE))
1375 continue;
1376 if(s->daddr && s->daddr!=raddr)
1377 continue;
1378 if(s->rcv_saddr && s->rcv_saddr != laddr)
1379 continue;
1380 return(s);
1381 }
1382 return(NULL);
1383 }
1384
1385 #ifdef CONFIG_IP_MULTICAST
1386
1387
1388
1389
1390 struct sock *get_sock_mcast(struct sock *sk,
1391 unsigned short num,
1392 unsigned long raddr,
1393 unsigned short rnum, unsigned long laddr)
1394 {
1395 struct sock *s;
1396 unsigned short hnum;
1397
1398 hnum = ntohs(num);
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409 s=sk;
1410
1411 for(; s != NULL; s = s->next)
1412 {
1413 if (s->num != hnum)
1414 continue;
1415 if(s->dead && (s->state == TCP_CLOSE))
1416 continue;
1417 if(s->daddr && s->daddr!=raddr)
1418 continue;
1419 if (s->dummy_th.dest != rnum && s->dummy_th.dest != 0)
1420 continue;
1421 if(s->rcv_saddr && s->rcv_saddr != laddr)
1422 continue;
1423 return(s);
1424 }
1425 return(NULL);
1426 }
1427
1428 #endif
1429
1430 static struct proto_ops inet_proto_ops = {
1431 AF_INET,
1432
1433 inet_create,
1434 inet_dup,
1435 inet_release,
1436 inet_bind,
1437 inet_connect,
1438 inet_socketpair,
1439 inet_accept,
1440 inet_getname,
1441 inet_select,
1442 inet_ioctl,
1443 inet_listen,
1444 inet_shutdown,
1445 inet_setsockopt,
1446 inet_getsockopt,
1447 inet_fcntl,
1448 inet_sendmsg,
1449 inet_recvmsg
1450 };
1451
1452 extern unsigned long seq_offset;
1453
1454
1455
1456
1457
1458 void inet_proto_init(struct net_proto *pro)
1459 {
1460 struct inet_protocol *p;
1461 int i;
1462
1463
1464 printk("Swansea University Computer Society TCP/IP for NET3.033\n");
1465
1466
1467
1468
1469
1470 (void) sock_register(inet_proto_ops.family, &inet_proto_ops);
1471
1472 seq_offset = CURRENT_TIME*250;
1473
1474
1475
1476
1477
1478 for(i = 0; i < SOCK_ARRAY_SIZE; i++)
1479 {
1480 tcp_prot.sock_array[i] = NULL;
1481 udp_prot.sock_array[i] = NULL;
1482 raw_prot.sock_array[i] = NULL;
1483 }
1484 tcp_prot.inuse = 0;
1485 tcp_prot.highestinuse = 0;
1486 udp_prot.inuse = 0;
1487 udp_prot.highestinuse = 0;
1488 raw_prot.inuse = 0;
1489 raw_prot.highestinuse = 0;
1490
1491 printk("IP Protocols: ");
1492 for(p = inet_protocol_base; p != NULL;)
1493 {
1494 struct inet_protocol *tmp = (struct inet_protocol *) p->next;
1495 inet_add_protocol(p);
1496 printk("%s%s",p->name,tmp?", ":"\n");
1497 p = tmp;
1498 }
1499
1500
1501
1502
1503 arp_init();
1504
1505
1506
1507 ip_init();
1508
1509
1510
1511 icmp_init(&inet_proto_ops);
1512
1513
1514
1515 #if defined(CONFIG_IP_ACCT)||defined(CONFIG_IP_FIREWALL)|| \
1516 defined(CONFIG_IP_MASQUERADE)
1517 ip_fw_init();
1518 #endif
1519
1520
1521
1522 #if defined(CONFIG_IP_MROUTE)
1523 ip_mr_init();
1524 #endif
1525
1526
1527
1528
1529
1530 #if defined(CONFIG_IP_ALIAS)
1531 ip_alias_init();
1532 #endif
1533
1534 #ifdef CONFIG_INET_RARP
1535 rarp_ioctl_hook = rarp_ioctl;
1536 #endif
1537
1538
1539
1540
1541 #ifdef CONFIG_PROC_FS
1542
1543 #ifdef CONFIG_INET_RARP
1544 proc_net_register(&(struct proc_dir_entry) {
1545 PROC_NET_RARP, 4, "rarp",
1546 S_IFREG | S_IRUGO, 1, 0, 0,
1547 0, &proc_net_inode_operations,
1548 rarp_get_info
1549 });
1550 #endif
1551
1552 proc_net_register(&(struct proc_dir_entry) {
1553 PROC_NET_RAW, 3, "raw",
1554 S_IFREG | S_IRUGO, 1, 0, 0,
1555 0, &proc_net_inode_operations,
1556 raw_get_info
1557 });
1558 proc_net_register(&(struct proc_dir_entry) {
1559 PROC_NET_SNMP, 4, "snmp",
1560 S_IFREG | S_IRUGO, 1, 0, 0,
1561 0, &proc_net_inode_operations,
1562 snmp_get_info
1563 });
1564 proc_net_register(&(struct proc_dir_entry) {
1565 PROC_NET_SOCKSTAT, 8, "sockstat",
1566 S_IFREG | S_IRUGO, 1, 0, 0,
1567 0, &proc_net_inode_operations,
1568 afinet_get_info
1569 });
1570 proc_net_register(&(struct proc_dir_entry) {
1571 PROC_NET_TCP, 3, "tcp",
1572 S_IFREG | S_IRUGO, 1, 0, 0,
1573 0, &proc_net_inode_operations,
1574 tcp_get_info
1575 });
1576 proc_net_register(&(struct proc_dir_entry) {
1577 PROC_NET_UDP, 3, "udp",
1578 S_IFREG | S_IRUGO, 1, 0, 0,
1579 0, &proc_net_inode_operations,
1580 udp_get_info
1581 });
1582 proc_net_register(&(struct proc_dir_entry) {
1583 PROC_NET_ROUTE, 5, "route",
1584 S_IFREG | S_IRUGO, 1, 0, 0,
1585 0, &proc_net_inode_operations,
1586 rt_get_info
1587 });
1588 proc_net_register(&(struct proc_dir_entry) {
1589 PROC_NET_RTCACHE, 8, "rt_cache",
1590 S_IFREG | S_IRUGO, 1, 0, 0,
1591 0, &proc_net_inode_operations,
1592 rt_cache_get_info
1593 });
1594 #endif
1595 }