summaryrefslogtreecommitdiffstats
path: root/cpukit/libnetworking/rtems/rtems_glue.c
blob: e43dc6e1dc9cbdcc011df7437c0aadf6df3b6dcb (plain) (blame)
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
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
#if HAVE_CONFIG_H
#include "config.h"
#endif

#define RTEMS_FAST_MUTEX

#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#include <errno.h>

#include <rtems.h>
#include <rtems/libio.h>
#include <rtems/error.h>
#include <rtems/rtems_bsdnet.h>
#include <rtems/rtems/semimpl.h>
#include <rtems/score/coremuteximpl.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/domain.h>
#include <sys/mbuf.h>
#include <sys/socketvar.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/callout.h>
#include <sys/proc.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <vm/vm.h>
#include <arpa/inet.h>

#include <net/netisr.h>
#include <net/route.h>

#include "loop.h"

/*
 * Sysctl init all.
 */
void sysctl_register_all(void *arg);

/*
 * Memory allocation
 */
static uint32_t nmbuf       = (64L * 1024L) / MSIZE;
       uint32_t nmbclusters = (128L * 1024L) / MCLBYTES;

/*
 * Network task synchronization
 */
static rtems_id networkSemaphore;
#ifdef RTEMS_FAST_MUTEX
Semaphore_Control   *the_networkSemaphore;
#endif
static rtems_id networkDaemonTid;
static uint32_t   networkDaemonPriority;
#ifdef RTEMS_SMP
static const cpu_set_t *networkDaemonCpuset = 0;
static size_t          networkDaemonCpusetSize = 0;
#endif
static void networkDaemon (void *task_argument);

/*
 * Network timing
 */
int			rtems_bsdnet_ticks_per_second;
int			rtems_bsdnet_microseconds_per_tick;

/*
 * Callout processing
 */
static rtems_interval	ticksWhenCalloutsLastChecked;
struct callout *callfree = NULL;
struct callout calltodo;

/*
 * FreeBSD variables
 */
int nfs_diskless_valid;

/*
 * BOOTP values
 */
struct in_addr rtems_bsdnet_log_host_address = {0};
struct in_addr rtems_bsdnet_bootp_server_address = {0};
char *rtems_bsdnet_bootp_boot_file_name = 0;
char *rtems_bsdnet_bootp_server_name = 0;
char *rtems_bsdnet_domain_name = 0;
char *rtems_bsdnet_bootp_cmdline = 0;
static struct in_addr _rtems_bsdnet_nameserver[sizeof rtems_bsdnet_config.name_server /
			sizeof rtems_bsdnet_config.name_server[0]];
struct in_addr *rtems_bsdnet_nameserver = _rtems_bsdnet_nameserver;
int rtems_bsdnet_nameserver_count = 0;
static struct in_addr _rtems_bsdnet_ntpserver[sizeof rtems_bsdnet_config.ntp_server /
			sizeof rtems_bsdnet_config.ntp_server[0]];
struct in_addr *rtems_bsdnet_ntpserver = _rtems_bsdnet_ntpserver;
int rtems_bsdnet_ntpserver_count = 0;
int32_t rtems_bsdnet_timeoffset = 0;

static const struct sockaddr_in address_template = {
	sizeof(address_template),
	AF_INET,
	0,
	{ INADDR_ANY },
	{ 0, 0, 0, 0, 0, 0, 0, 0 }
};

static void
rtems_bsdnet_initialize_sockaddr_in(struct sockaddr_in *addr)
{
	memcpy(addr, &address_template, sizeof(*addr));
}

uint32_t
rtems_bsdnet_semaphore_release_recursive(void)
{
#ifdef RTEMS_FAST_MUTEX
	uint32_t nest_count;
	uint32_t i;

	nest_count =
		the_networkSemaphore ?
		the_networkSemaphore->Core_control.mutex.nest_count : 0;
	for (i = 0; i < nest_count; ++i) {
		rtems_bsdnet_semaphore_release();
	}

	return nest_count;
#else
	#error "not implemented"
#endif
}

void
rtems_bsdnet_semaphore_obtain_recursive(uint32_t nest_count)
{
	uint32_t i;

	for (i = 0; i < nest_count; ++i) {
		rtems_bsdnet_semaphore_obtain();
	}
}

/*
 * Perform FreeBSD memory allocation.
 * FIXME: This should be modified to keep memory allocation statistics.
 */
#undef malloc
#undef free
extern void *malloc (size_t);
extern void free (void *);
void *
rtems_bsdnet_malloc (size_t size, int type, int flags)
{
	void *p;
	int try = 0;

	for (;;) {
		uint32_t nest_count;

		p = malloc (size);
		if (p || (flags & M_NOWAIT))
			return p;
		nest_count = rtems_bsdnet_semaphore_release_recursive ();
		if (++try >= 30) {
			rtems_bsdnet_malloc_starvation();
			try = 0;
		}
		rtems_task_wake_after (rtems_bsdnet_ticks_per_second);
		rtems_bsdnet_semaphore_obtain_recursive (nest_count);
	}
}

/*
 * Free FreeBSD memory
 * FIXME: This should be modified to keep memory allocation statistics.
 */
void
rtems_bsdnet_free (void *addr, int type)
{
	free (addr);
}

/*
 * Externs for BSD data we have to access during initialization
 */
extern struct domain routedomain;
extern struct domain inetdomain;

/*
 * Do the initializations required by the BSD code
 */
static int
bsd_init (void)
{
	int i;
	char *p;

	/*
	 * Set up mbuf cluster data strutures
	 */
	p = rtems_bsdnet_malloc_mbuf ((nmbclusters*MCLBYTES)+MCLBYTES-1, MBUF_MALLOC_NMBCLUSTERS);
	if (p == NULL) {
		printf ("Can't get network cluster memory.\n");
		return -1;
	}
	p = (char *)(((intptr_t)p + (MCLBYTES-1)) & ~(MCLBYTES-1));
	mbutl = (struct mbuf *)p;
	for (i = 0; i < nmbclusters; i++) {
		((union mcluster *)p)->mcl_next = mclfree;
		mclfree = (union mcluster *)p;
		p += MCLBYTES;
		mbstat.m_clfree++;
	}
	mbstat.m_clusters = nmbclusters;
	mclrefcnt = rtems_bsdnet_malloc_mbuf (nmbclusters, MBUF_MALLOC_MCLREFCNT);
	if (mclrefcnt == NULL) {
		printf ("Can't get mbuf cluster reference counts memory.\n");
		return -1;
	}
	memset (mclrefcnt, '\0', nmbclusters);

	/*
	 * Set up mbuf data structures
	 */

	p = rtems_bsdnet_malloc_mbuf(nmbuf * MSIZE + MSIZE - 1,MBUF_MALLOC_MBUF);
	p = (char *)(((uintptr_t)p + MSIZE - 1) & ~(MSIZE - 1));
	if (p == NULL) {
		printf ("Can't get network memory.\n");
		return -1;
	}
	for (i = 0; i < nmbuf; i++) {
		((struct mbuf *)p)->m_next = mmbfree;
		mmbfree = (struct mbuf *)p;
		p += MSIZE;
	}
	mbstat.m_mbufs = nmbuf;
	mbstat.m_mtypes[MT_FREE] = nmbuf;

	/*
	 * Set up domains
	 */
	{

	routedomain.dom_next = domains;
	domains = &routedomain;
	inetdomain.dom_next = domains;
	domains = &inetdomain;
	domaininit (NULL);
	}

  /*
   * Setup the sysctl, normally done by a SYSINIT call.
   */
  sysctl_register_all(0);

	/*
	 * Set up interfaces
	 */
	ifinit (NULL);
	return 0;
}

/*
 * RTEMS Specific Helper Routines
 */
extern void rtems_set_udp_buffer_sizes( u_long, u_long );
extern void rtems_set_tcp_buffer_sizes( u_long, u_long );
extern void rtems_set_sb_efficiency( u_long );

/*
 * Initialize and start network operations
 */
static int
rtems_bsdnet_initialize (void)
{
	rtems_status_code sc;

	/*
	 * Set the priority of all network tasks
	 */
	if (rtems_bsdnet_config.network_task_priority == 0)
		networkDaemonPriority = 100;
	else
		networkDaemonPriority = rtems_bsdnet_config.network_task_priority;

	/*
	 * Default network task CPU affinity
	 */
#ifdef RTEMS_SMP
	networkDaemonCpuset = rtems_bsdnet_config.network_task_cpuset;
	networkDaemonCpusetSize = rtems_bsdnet_config.network_task_cpuset_size;
#endif

	/*
	 * Set the memory allocation limits
	 */
	if (rtems_bsdnet_config.mbuf_bytecount)
		nmbuf = rtems_bsdnet_config.mbuf_bytecount / MSIZE;
	if (rtems_bsdnet_config.mbuf_cluster_bytecount)
		nmbclusters = rtems_bsdnet_config.mbuf_cluster_bytecount / MCLBYTES;

        rtems_set_udp_buffer_sizes(
          rtems_bsdnet_config.udp_tx_buf_size,
          rtems_bsdnet_config.udp_rx_buf_size
        );

        rtems_set_tcp_buffer_sizes(
          rtems_bsdnet_config.tcp_tx_buf_size,
          rtems_bsdnet_config.tcp_rx_buf_size
        );

        rtems_set_sb_efficiency( rtems_bsdnet_config.sb_efficiency );

	/*
	 * Create the task-synchronization semaphore
	 */
	sc = rtems_semaphore_create (rtems_build_name('B', 'S', 'D', 'n'),
					0,
					RTEMS_PRIORITY |
						RTEMS_BINARY_SEMAPHORE |
						RTEMS_INHERIT_PRIORITY |
						RTEMS_NO_PRIORITY_CEILING |
						RTEMS_LOCAL,
					0,
					&networkSemaphore);
	if (sc != RTEMS_SUCCESSFUL) {
		printf ("Can't create network seamphore: `%s'\n", rtems_status_text (sc));
		return -1;
	}
#ifdef RTEMS_FAST_MUTEX
	{
	Objects_Locations location;
	the_networkSemaphore = _Semaphore_Get( networkSemaphore, &location );
	_Thread_Enable_dispatch();
	}
#endif

	/*
	 * Compute clock tick conversion factors
	 */
	rtems_bsdnet_ticks_per_second = rtems_clock_get_ticks_per_second();
	if (rtems_bsdnet_ticks_per_second <= 0)
		rtems_bsdnet_ticks_per_second = 1;
	rtems_bsdnet_microseconds_per_tick =
		1000000 / rtems_bsdnet_ticks_per_second;

	/*
	 * Set up BSD-style sockets
	 */
	if (bsd_init () < 0)
		return -1;

	/*
	 * Start network daemon
	 */
	networkDaemonTid = rtems_bsdnet_newproc ("ntwk", 4096, networkDaemon, NULL);

	/*
	 * Let other network tasks begin
	 */
	rtems_bsdnet_semaphore_release ();

	rtems_bsdnet_initialize_loop();

	return 0;
}

/*
 * Obtain network mutex
 */
void
rtems_bsdnet_semaphore_obtain (void)
{
#ifdef RTEMS_FAST_MUTEX
	ISR_lock_Context lock_context;
	Thread_Control *executing;
	_ISR_lock_ISR_disable(&lock_context);
	if (!the_networkSemaphore)
		rtems_panic ("rtems-net: network sema obtain: network not initialised\n");
	executing = _Thread_Executing;
	_CORE_mutex_Seize (
		&the_networkSemaphore->Core_control.mutex,
		executing,
		networkSemaphore,
		1,		/* wait */
		0,		/* forever */
		&lock_context
		);
	if (executing->Wait.return_code)
		rtems_panic ("rtems-net: can't obtain network sema: %d\n",
                 executing->Wait.return_code);
#else
	rtems_status_code sc;

	sc = rtems_semaphore_obtain (networkSemaphore, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
	if (sc != RTEMS_SUCCESSFUL)
		rtems_panic ("rtems-net: can't obtain network semaphore: `%s'\n",
                 rtems_status_text (sc));
#endif
}

/*
 * Release network mutex
 */
void
rtems_bsdnet_semaphore_release (void)
{
#ifdef RTEMS_FAST_MUTEX
        ISR_lock_Context lock_context;
	CORE_mutex_Status status;

	if (!the_networkSemaphore)
		rtems_panic ("rtems-net: network sema obtain: network not initialised\n");
        _ISR_lock_ISR_disable(&lock_context);
	status = _CORE_mutex_Surrender (
		&the_networkSemaphore->Core_control.mutex,
		networkSemaphore,
		NULL,
                &lock_context
		);
	if (status != CORE_MUTEX_STATUS_SUCCESSFUL)
		rtems_panic ("rtems-net: can't release network sema: %i\n");
#else
	rtems_status_code sc;

	sc = rtems_semaphore_release (networkSemaphore);
	if (sc != RTEMS_SUCCESSFUL)
		rtems_panic ("rtems-net: can't release network semaphore: `%s'\n",
                 rtems_status_text (sc));
#endif
}

static int
rtems_bsdnet_sleep(rtems_event_set in, rtems_interval ticks)
{
	rtems_status_code sc;
	rtems_event_set out;
	rtems_event_set out2;

	in |= RTEMS_EVENT_SYSTEM_NETWORK_CLOSE;

	/*
	 * Soak up any pending events.  The sleep/wakeup synchronization in the
	 * FreeBSD kernel has no memory.
	 */
	rtems_event_system_receive(in, RTEMS_EVENT_ANY | RTEMS_NO_WAIT,
	    RTEMS_NO_TIMEOUT, &out);

	/*
	 * Wait for the wakeup event.
	 */
	sc = rtems_bsdnet_event_receive(in, RTEMS_EVENT_ANY | RTEMS_WAIT,
	    ticks, &out);

	/*
	 * Get additional events that may have been received between the
	 * rtems_event_system_receive() and the rtems_bsdnet_semaphore_obtain().
	 */
	rtems_event_system_receive(in, RTEMS_EVENT_ANY | RTEMS_NO_WAIT,
	    RTEMS_NO_TIMEOUT, &out2);
	out |= out2;

	if (out & RTEMS_EVENT_SYSTEM_NETWORK_CLOSE)
		return (ENXIO);

	if (sc == RTEMS_SUCCESSFUL)
		return (0);

	return (EWOULDBLOCK);
}

/*
 * Wait for something to happen to a socket buffer
 */
int
sbwait(struct sockbuf *sb)
{
	int error;

	/*
	 * Set this task as the target of the wakeup operation.
	 */
	sb->sb_sel.si_pid = rtems_task_self();

	/*
	 * Show that socket is waiting
	 */
	sb->sb_flags |= SB_WAIT;

	error = rtems_bsdnet_sleep(SBWAIT_EVENT, sb->sb_timeo);
	if (error != ENXIO)
		sb->sb_flags &= ~SB_WAIT;

	return (error);
}


/*
 * Wake up the task waiting on a socket buffer.
 */
void
sowakeup(
	struct socket *so,
	struct sockbuf *sb)
{
	if (sb->sb_flags & SB_WAIT) {
		rtems_event_system_send (sb->sb_sel.si_pid, SBWAIT_EVENT);
	}
	if (sb->sb_wakeup) {
		(*sb->sb_wakeup) (so, sb->sb_wakeuparg);
	}
}

/*
 * For now, a socket can be used by only one task at a time.
 */
int
sb_lock(struct sockbuf *sb)
{
	rtems_panic ("Socket buffer is already in use.");
	return 0;
}
void
wakeup (void *p)
{
	rtems_panic ("Wakeup called");
}

/*
 * Wait for a connection/disconnection event.
 */
int
soconnsleep (struct socket *so)
{
	int error;

	/*
	 * Set this task as the target of the wakeup operation.
	 */
	if (so->so_pgid)
		rtems_panic ("Another task is already sleeping on that socket");
	so->so_pgid = rtems_task_self();

	error = rtems_bsdnet_sleep(SOSLEEP_EVENT, so->so_rcv.sb_timeo);
	if (error != ENXIO)
		so->so_pgid = 0;

	return (error);
}

/*
 * Wake up a task waiting for a connection/disconnection to complete.
 */
void
soconnwakeup (struct socket *so)
{
	if (so->so_pgid)
		rtems_event_system_send (so->so_pgid, SOSLEEP_EVENT);
}

/*
 * Send an event to the network daemon.
 * This corresponds to sending a software interrupt in the BSD kernel.
 */
void
rtems_bsdnet_schednetisr (int n)
{
	rtems_event_system_send (networkDaemonTid, 1 << n);
}

/*
 * The network daemon
 * This provides a context to run BSD software interrupts
 */
static void
networkDaemon (void *task_argument)
{
	rtems_status_code sc;
	rtems_event_set events;
	rtems_interval now;
	int ticksPassed;
	uint32_t   timeout;
	struct callout *c;

	for (;;) {
		c = calltodo.c_next;
		if (c)
			timeout = c->c_time;
		else
			timeout = RTEMS_NO_TIMEOUT;

		sc = rtems_bsdnet_event_receive (NETISR_EVENTS,
						RTEMS_EVENT_ANY | RTEMS_WAIT,
						timeout,
						&events);
		if ( sc == RTEMS_SUCCESSFUL ) {
			if (events & NETISR_IP_EVENT)
				ipintr ();
			if (events & NETISR_ARP_EVENT)
				arpintr ();
		}

  		now = rtems_clock_get_ticks_since_boot();
		ticksPassed = now - ticksWhenCalloutsLastChecked;
		if (ticksPassed != 0) {
			ticksWhenCalloutsLastChecked = now;

			c = calltodo.c_next;
			if (c) {
				c->c_time -= ticksPassed;
				while ((c = calltodo.c_next) != NULL && c->c_time <= 0) {
					void *arg;
					void (*func) (void *);

					func = c->c_func;
					arg = c->c_arg;
					calltodo.c_next = c->c_next;
					c->c_next = callfree;
					callfree = c;
					(*func)(arg);
				}
			}
		}
	}
}

/*
 * Structure passed to task-start stub
 */
struct newtask {
	void (*entry)(void *);
	void *arg;
};

/*
 * Task-start stub
 */
static void
taskEntry (rtems_task_argument arg)
{
	struct newtask t;

	/*
	 * Pick up task information and free
	 * the memory allocated to pass the
	 * information to this task.
	 */
	t = *(struct newtask *)arg;
	free ((struct newtask *)arg);

	/*
	 * Enter the competition for the network semaphore
	 */
	rtems_bsdnet_semaphore_obtain ();

	/*
	 * Enter the task
	 */
	(*t.entry)(t.arg);
	rtems_panic ("Network task returned!\n");
}


/*
 * Start a network task
 */
#ifdef RTEMS_SMP
rtems_id
rtems_bsdnet_newproc (char *name, int stacksize, void(*entry)(void *), void *arg)
{
	return rtems_bsdnet_newproc_affinity( name, stacksize, entry, arg,
		networkDaemonCpuset, networkDaemonCpusetSize );
}

rtems_id
rtems_bsdnet_newproc_affinity (char *name, int stacksize, void(*entry)(void *),
    void *arg, const cpu_set_t *set, const size_t setsize)
#else
rtems_id
rtems_bsdnet_newproc (char *name, int stacksize, void(*entry)(void *), void *arg)
#endif
{
	struct newtask *t;
	char nm[4];
	rtems_id tid;
	rtems_status_code sc;

	strncpy (nm, name, 4);
	sc = rtems_task_create (rtems_build_name(nm[0], nm[1], nm[2], nm[3]),
		networkDaemonPriority,
		stacksize,
		RTEMS_PREEMPT|RTEMS_NO_TIMESLICE|RTEMS_NO_ASR|RTEMS_INTERRUPT_LEVEL(0),
		RTEMS_NO_FLOATING_POINT|RTEMS_LOCAL,
		&tid);
	if (sc != RTEMS_SUCCESSFUL)
		rtems_panic ("Can't create network daemon `%s': `%s'\n", name, rtems_status_text (sc));

#ifdef RTEMS_SMP
	/*
	 * Use the default affinity or use the user-provided CPU set
	 */
	if ( set != 0 )
		rtems_task_set_affinity( tid, setsize, set );
#endif

	/*
	 * Set up task arguments
	 */
	t = malloc (sizeof *t);
	t->entry = entry;
	t->arg = arg;

	/*
	 * Start the task
	 */
	sc = rtems_task_start (tid, taskEntry, (rtems_task_argument)t);
	if (sc != RTEMS_SUCCESSFUL)
		rtems_panic ("Can't start network daemon `%s': `%s'\n", name, rtems_status_text (sc));

	/*
	 * Let our caller know the i.d. of the new task
	 */
	return tid;
}

rtems_status_code rtems_bsdnet_event_receive (
  rtems_event_set  event_in,
  rtems_option     option_set,
  rtems_interval   ticks,
  rtems_event_set *event_out)
{
	rtems_status_code sc;

	rtems_bsdnet_semaphore_release ();
	sc = rtems_event_system_receive (event_in, option_set, ticks, event_out);
	rtems_bsdnet_semaphore_obtain ();
	return sc;
}

/*
 * Fake random number generator
 */
unsigned long
rtems_bsdnet_random (void)
{
	rtems_interval now;

	now = rtems_clock_get_ticks_since_boot();
	return (now * 99991);
}

/*
 * Callout list processing
 */
void
rtems_bsdnet_timeout(void (*ftn)(void *), void *arg, int ticks)
{
	register struct callout *new, *p, *t;

	if (ticks <= 0)
		ticks = 1;

	/* Fill in the next free callout structure. */
	if (callfree == NULL) {
		callfree = malloc (sizeof *callfree);
		if (callfree == NULL)
			rtems_panic ("No memory for timeout table entry");
		callfree->c_next = NULL;
	}

	new = callfree;
	callfree = new->c_next;
	new->c_arg = arg;
	new->c_func = ftn;

	/*
	 * The time for each event is stored as a difference from the time
	 * of the previous event on the queue.  Walk the queue, correcting
	 * the ticks argument for queue entries passed.  Correct the ticks
	 * value for the queue entry immediately after the insertion point
	 * as well.  Watch out for negative c_time values; these represent
	 * overdue events.
	 */
	for (p = &calltodo;
	    (t = p->c_next) != NULL && ticks > t->c_time; p = t)
		if (t->c_time > 0)
			ticks -= t->c_time;
	new->c_time = ticks;
	if (t != NULL)
		t->c_time -= ticks;

	/* Insert the new entry into the queue. */
	p->c_next = new;
	new->c_next = t;
}

/*
 * Ticks till specified time
 * XXX: This version worries only about seconds, but that's good
 * enough for the way the network code uses this routine.
 */
int
hzto(struct timeval *tv)
{
	long diff = tv->tv_sec - rtems_bsdnet_seconds_since_boot();

	if (diff <= 0)
		return 1;
	return diff * rtems_bsdnet_ticks_per_second;
}

/*
 * Kernel debugging
 */
int rtems_bsdnet_log_priority;
void
rtems_bsdnet_log (int priority, const char *fmt, ...)
{
	va_list args;

	if (priority & rtems_bsdnet_log_priority) {
		va_start (args, fmt);
		vprintf (fmt, args);
		va_end (args);
	}
}

/*
 * IP header checksum routine for processors which don't have an inline version
 */
u_int
in_cksum_hdr (const void *ip)
{
	uint32_t   sum;
	const uint16_t   *sp;
	int i;

	sum = 0;
	sp = (uint16_t   *)ip;
	for (i = 0 ; i < 10 ; i++)
		sum += *sp++;
	while (sum > 0xFFFF)
		sum = (sum & 0xffff) + (sum >> 16);
	return ~sum & 0xFFFF;
}

/*
 * Manipulate routing tables
 */
int rtems_bsdnet_rtrequest (
    int req,
    struct sockaddr *dst,
    struct sockaddr *gateway,
    struct sockaddr *netmask,
    int flags,
    struct rtentry **net_nrt)
{
	int error;

	rtems_bsdnet_semaphore_obtain ();
	error = rtrequest (req, dst, gateway, netmask, flags, net_nrt);
	rtems_bsdnet_semaphore_release ();
	if (error) {
		errno = error;
		return -1;
	}
	return 0;
}

static bool
rtems_bsdnet_setup_interface(
	const char *name,
	const char *ip_address,
	const char *ip_netmask
)
{
	struct sockaddr_in address;
	struct sockaddr_in netmask;
	short flags;

	/*
	 * Bring interface up
	 */
	flags = IFF_UP;
	if (rtems_bsdnet_ifconfig (name, SIOCSIFFLAGS, &flags) < 0) {
		printf ("Can't bring %s up: %s\n", name, strerror (errno));
		return false;
	}

	/*
	 * Set interface netmask
	 */
	rtems_bsdnet_initialize_sockaddr_in(&netmask);
	netmask.sin_addr.s_addr = inet_addr (ip_netmask);
	if (rtems_bsdnet_ifconfig (name, SIOCSIFNETMASK, &netmask) < 0) {
		printf ("Can't set %s netmask: %s\n", name, strerror (errno));
		return false;
	}

	/*
	 * Set interface address
	 */
	rtems_bsdnet_initialize_sockaddr_in(&address);
	address.sin_addr.s_addr = inet_addr (ip_address);
	if (rtems_bsdnet_ifconfig (name, SIOCSIFADDR, &address) < 0) {
		printf ("Can't set %s address: %s\n", name, strerror (errno));
		return false;
	}

	/*
	 * Set interface broadcast address if the interface has the
	 * broadcast flag set.
	 */
	if (rtems_bsdnet_ifconfig (name, SIOCGIFFLAGS, &flags) < 0) {
		printf ("Can't read %s flags: %s\n", name, strerror (errno));
		return false;
	}

	if (flags & IFF_BROADCAST) {
		struct sockaddr_in broadcast;

		rtems_bsdnet_initialize_sockaddr_in(&broadcast);
		broadcast.sin_addr.s_addr =
				address.sin_addr.s_addr | ~netmask.sin_addr.s_addr;
		if (rtems_bsdnet_ifconfig (name, SIOCSIFBRDADDR, &broadcast) < 0) {
			struct in_addr	in_addr;
			char			buf[20];
			in_addr.s_addr = broadcast.sin_addr.s_addr;
			if (!inet_ntop(AF_INET, &in_addr, buf, sizeof(buf)))
					strcpy(buf,"?.?.?.?");
			printf ("Can't set %s broadcast address %s: %s\n",
				name, buf, strerror (errno));
		}
	}

	return true;
}

static int
rtems_bsdnet_setup (void)
{
	struct rtems_bsdnet_ifconfig *ifp;
	int i;
	bool any_if_configured = false;

	/*
	 * Set local parameters
	 */
	if (rtems_bsdnet_config.hostname)
		sethostname (rtems_bsdnet_config.hostname,
					strlen (rtems_bsdnet_config.hostname));
	if (rtems_bsdnet_config.domainname)
		rtems_bsdnet_domain_name =
					strdup (rtems_bsdnet_config.domainname);
	if (rtems_bsdnet_config.log_host)
		rtems_bsdnet_log_host_address.s_addr =
				inet_addr (rtems_bsdnet_config.log_host);
	for (i = 0 ; i < sizeof rtems_bsdnet_config.name_server /
			sizeof rtems_bsdnet_config.name_server[0] ; i++) {
		if (!rtems_bsdnet_config.name_server[i])
			break;
		rtems_bsdnet_nameserver[rtems_bsdnet_nameserver_count++].s_addr
			= inet_addr (rtems_bsdnet_config.name_server[i]);
	}
	for (i = 0 ; i < sizeof rtems_bsdnet_config.ntp_server /
			sizeof rtems_bsdnet_config.ntp_server[0] ; i++) {
		if (!rtems_bsdnet_config.ntp_server[i])
			break;
		rtems_bsdnet_ntpserver[rtems_bsdnet_ntpserver_count++].s_addr
			= inet_addr (rtems_bsdnet_config.ntp_server[i]);
	}

	/*
	 * Configure interfaces
	 */
	any_if_configured |= rtems_bsdnet_setup_interface(
		"lo0",
		"127.0.0.1",
		"255.0.0.0"
	);
	for (ifp = rtems_bsdnet_config.ifconfig ; ifp ; ifp = ifp->next) {
		if (ifp->ip_address == NULL)
			continue;

		any_if_configured |= rtems_bsdnet_setup_interface(
			ifp->name,
			ifp->ip_address,
			ifp->ip_netmask
		);
	}

	/*
	 * Set default route
	 */
	if (rtems_bsdnet_config.gateway && any_if_configured) {
		struct sockaddr_in address;
		struct sockaddr_in netmask;
		struct sockaddr_in gateway;

		rtems_bsdnet_initialize_sockaddr_in(&address);
		rtems_bsdnet_initialize_sockaddr_in(&netmask);
		rtems_bsdnet_initialize_sockaddr_in(&gateway);

		gateway.sin_addr.s_addr = inet_addr (rtems_bsdnet_config.gateway);

		if (rtems_bsdnet_rtrequest (
				RTM_ADD,
				(struct sockaddr *)&address,
				(struct sockaddr *)&gateway,
				(struct sockaddr *)&netmask,
				(RTF_UP | RTF_GATEWAY | RTF_STATIC), NULL) < 0) {
			printf ("Can't set default route: %s\n", strerror (errno));
			return -1;
		}
	}
	return 0;
}

/*
 * Initialize the network
 */
int
rtems_bsdnet_initialize_network(void)
{
	struct rtems_bsdnet_ifconfig *ifp;

	/*
	 * Start network tasks.
	 * Initialize BSD network data structures.
	 */
	if (rtems_bsdnet_initialize () < 0)
		return -1;

	/*
	 * Attach interfaces
	 */
	for (ifp = rtems_bsdnet_config.ifconfig ; ifp ; ifp = ifp->next) {
		rtems_bsdnet_attach (ifp);
	}

	/*
	 * Bring up the network
	 */
	if (rtems_bsdnet_setup () < 0)
		return -1;
	if (rtems_bsdnet_config.bootp)
		(*rtems_bsdnet_config.bootp)();
	return 0;
}

/*
 * Attach a network interface.
 */
void rtems_bsdnet_attach(struct rtems_bsdnet_ifconfig *ifp)
{
	if (ifp) {
		rtems_bsdnet_semaphore_obtain ();
		(ifp->attach)(ifp, 1);
		rtems_bsdnet_semaphore_release ();
	}
}

/*
 * Detach a network interface.
 */
void rtems_bsdnet_detach (struct rtems_bsdnet_ifconfig *ifp)
{
	if (ifp) {
		rtems_bsdnet_semaphore_obtain ();
		(ifp->attach)(ifp, 0);
		rtems_bsdnet_semaphore_release ();
	}
}

/*
 * Interface Configuration.
 */
int rtems_bsdnet_ifconfig(const char *ifname, uint32_t cmd, void *param)
{
	int s, r = 0;
	struct ifreq ifreq;

	/*
	 * Configure interfaces
	 */
	s = socket (AF_INET, SOCK_DGRAM, 0);
	if (s < 0)
		return -1;

	strncpy (ifreq.ifr_name, ifname, IFNAMSIZ);

	rtems_bsdnet_semaphore_obtain ();

	switch (cmd) {
		case SIOCSIFADDR:
		case SIOCSIFNETMASK:
			memcpy (&ifreq.ifr_addr, param, sizeof (struct sockaddr));
			r = ioctl (s, cmd, &ifreq);
			break;

		case OSIOCGIFADDR:
		case SIOCGIFADDR:
		case OSIOCGIFNETMASK:
		case SIOCGIFNETMASK:
			if ((r = ioctl (s, cmd, &ifreq)) < 0)
				break;
			memcpy (param, &ifreq.ifr_addr, sizeof (struct sockaddr));
			break;

		case SIOCGIFFLAGS:
		case SIOCSIFFLAGS:
			if ((r = ioctl (s, SIOCGIFFLAGS, &ifreq)) < 0)
				break;
			if (cmd == SIOCGIFFLAGS) {
				*((short*) param) = ifreq.ifr_flags;
				break;
			}
			ifreq.ifr_flags |= *((short*) param);
			if ( (*((short*) param) & IFF_UP ) == 0 ) {
			    /* set the interface down */
			    ifreq.ifr_flags &= ~(IFF_UP);
			}
			r = ioctl (s, SIOCSIFFLAGS, &ifreq);
			break;

		case SIOCSIFDSTADDR:
			memcpy (&ifreq.ifr_dstaddr, param, sizeof (struct sockaddr));
			r = ioctl (s, cmd, &ifreq);
			break;

		case OSIOCGIFDSTADDR:
		case SIOCGIFDSTADDR:
			if ((r = ioctl (s, cmd, &ifreq)) < 0)
				break;
			memcpy (param, &ifreq.ifr_dstaddr, sizeof (struct sockaddr));
			break;

		case SIOCSIFBRDADDR:
			memcpy (&ifreq.ifr_broadaddr, param, sizeof (struct sockaddr));
			r = ioctl (s, cmd, &ifreq);
			break;

		case OSIOCGIFBRDADDR:
		case SIOCGIFBRDADDR:
			if ((r = ioctl (s, cmd, &ifreq)) < 0)
				break;
			memcpy (param, &ifreq.ifr_broadaddr, sizeof (struct sockaddr));
			break;

		case SIOCSIFMETRIC:
			ifreq.ifr_metric = *((int*) param);
			r = ioctl (s, cmd, &ifreq);
			break;

		case SIOCGIFMETRIC:
			if ((r = ioctl (s, cmd, &ifreq)) < 0)
				break;
			*((int*) param) = ifreq.ifr_metric;
			break;

		case SIOCSIFMTU:
			ifreq.ifr_mtu = *((int*) param);
			r = ioctl (s, cmd, &ifreq);
			break;

		case SIOCGIFMTU:
			if ((r = ioctl (s, cmd, &ifreq)) < 0)
				break;
			*((int*) param) = ifreq.ifr_mtu;
			break;

		case SIOCSIFPHYS:
			ifreq.ifr_phys = *((int*) param);
			r = ioctl (s, cmd, &ifreq);
			break;

		case SIOCGIFPHYS:
			if ((r = ioctl (s, cmd, &ifreq)) < 0)
				break;
			*((int*) param) = ifreq.ifr_phys;
			break;

		case SIOCSIFMEDIA:
			ifreq.ifr_media = *((int*) param);
			r = ioctl (s, cmd, &ifreq);
			break;

		case SIOCGIFMEDIA:
			/* 'param' passes the phy index they want to
			 * look at...
			 */
			ifreq.ifr_media = *((int*) param);
			if ((r = ioctl (s, cmd, &ifreq)) < 0)
				break;
			*((int*) param) = ifreq.ifr_media;
			break;

		case SIOCAIFADDR:
		case SIOCDIFADDR:
			r = ioctl(s, cmd, (struct ifreq *) param);
			break;

		default:
			errno = EOPNOTSUPP;
			r = -1;
			break;
	}

	rtems_bsdnet_semaphore_release ();

	close (s);
	return r;
}

/**
 * @brief Splits a network interface name with interface configuration @a
 * config into the unit name and number parts.
 *
 * Memory for the unit name will be allocated from the heap and copied to @a
 * namep.  If @a namep is NULL nothing will be allocated and copied.
 *
 * Returns the unit number or -1 on error.
 */
int
rtems_bsdnet_parse_driver_name (const struct rtems_bsdnet_ifconfig *config, char **namep)
{
	const char *cp = config->name;
	char c;
	int unitNumber = 0;

	if (cp == NULL) {
		printf ("No network driver name.\n");
		return -1;
	}
	while ((c = *cp++) != '\0') {
		if ((c >= '0') && (c <= '9')) {
			int len = cp - config->name;
			if ((len < 2) || (len > 50))
				break;
			for (;;) {
				unitNumber = (unitNumber * 10) + (c - '0');
				c = *cp++;
				if (c == '\0') {
					if (namep != NULL) {
						char *unitName = malloc (len);
						if (unitName == NULL) {
							printf ("No memory.\n");
							return -1;
						}
						strncpy (unitName, config->name, len - 1);
						unitName[len-1] = '\0';
						*namep = unitName;
					}
					return unitNumber;
				}
				if ((c < '0') || (c > '9'))
					break;
			}
			break;
		}
	}
	printf ("Bad network driver name `%s'.\n", config->name);
	return -1;
}

/*
 * Handle requests for more network memory
 * XXX: Another possibility would be to use a semaphore here with
 *      a release in the mbuf free macro.  I have chosen this `polling'
 *      approach because:
 *      1) It is simpler.
 *      2) It adds no complexity to the free macro.
 *      3) Running out of mbufs should be a rare
 *         condition -- predeployment testing of
 *         an application should indicate the
 *         required mbuf pool size.
 * XXX: Should there be a panic if a task is stuck in the loop for
 *      more than a minute or so?
 */
int
m_mballoc(int nmb, int nowait)
{
	if (nowait)
		return 0;
	m_reclaim ();
	if (mmbfree == NULL) {
		int try = 0;
		int print_limit = 30 * rtems_bsdnet_ticks_per_second;

		mbstat.m_wait++;
		for (;;) {
			uint32_t nest_count = rtems_bsdnet_semaphore_release_recursive ();
			rtems_task_wake_after (1);
			rtems_bsdnet_semaphore_obtain_recursive (nest_count);
			if (mmbfree)
				break;
			if (++try >= print_limit) {
				printf ("Still waiting for mbuf.\n");
				try = 0;
			}
		}
	}
	else {
		mbstat.m_drops++;
	}
	return 1;
}

int
m_clalloc(int ncl, int nowait)
{
	if (nowait)
		return 0;
	m_reclaim ();
	if (mclfree == NULL) {
		int try = 0;
		int print_limit = 30 * rtems_bsdnet_ticks_per_second;

		mbstat.m_wait++;
		for (;;) {
			uint32_t nest_count = rtems_bsdnet_semaphore_release_recursive ();
			rtems_task_wake_after (1);
			rtems_bsdnet_semaphore_obtain_recursive (nest_count);
			if (mclfree)
				break;
			if (++try >= print_limit) {
				printf ("Still waiting for mbuf cluster.\n");
				try = 0;
			}
		}
	}
	else {
		mbstat.m_drops++;
	}
	return 1;
}

void microtime(struct timeval *tv)
{
	rtems_clock_get_uptime_timeval(tv);
}