aboutsummaryrefslogtreecommitdiffstats
path: root/net/irda/irnet/irnet_irda.c
blob: 7f17a8020e8a0b99c82f236f34bb0f7fc8d604be (plain)
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
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
/*
 *	IrNET protocol module : Synchronous PPP over an IrDA socket.
 *
 *		Jean II - HPL `00 - <jt@hpl.hp.com>
 *
 * This file implement the IRDA interface of IrNET.
 * Basically, we sit on top of IrTTP. We set up IrTTP, IrIAS properly,
 * and exchange frames with IrTTP.
 */

#include "irnet_irda.h"		/* Private header */
#include <linux/sched.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <asm/unaligned.h>

/*
 * PPP disconnect work: we need to make sure we're in
 * process context when calling ppp_unregister_channel().
 */
static void irnet_ppp_disconnect(struct work_struct *work)
{
	irnet_socket * self =
		container_of(work, irnet_socket, disconnect_work);

	if (self == NULL)
		return;
	/*
	 * If we were connected, cleanup & close the PPP
	 * channel, which will kill pppd (hangup) and the rest.
	 */
	if (self->ppp_open && !self->ttp_open && !self->ttp_connect) {
		ppp_unregister_channel(&self->chan);
		self->ppp_open = 0;
	}
}

/************************* CONTROL CHANNEL *************************/
/*
 * When ppp is not active, /dev/irnet act as a control channel.
 * Writing allow to set up the IrDA destination of the IrNET channel,
 * and any application may be read events happening on IrNET...
 */

/*------------------------------------------------------------------*/
/*
 * Post an event to the control channel...
 * Put the event in the log, and then wait all process blocked on read
 * so they can read the log...
 */
static void
irnet_post_event(irnet_socket *	ap,
		 irnet_event	event,
		 __u32		saddr,
		 __u32		daddr,
		 char *		name,
		 __u16		hints)
{
  int			index;		/* In the log */

  DENTER(CTRL_TRACE, "(ap=0x%p, event=%d, daddr=%08x, name=``%s'')\n",
	 ap, event, daddr, name);

  /* Protect this section via spinlock.
   * Note : as we are the only event producer, we only need to exclude
   * ourself when touching the log, which is nice and easy.
   */
  spin_lock_bh(&irnet_events.spinlock);

  /* Copy the event in the log */
  index = irnet_events.index;
  irnet_events.log[index].event = event;
  irnet_events.log[index].daddr = daddr;
  irnet_events.log[index].saddr = saddr;
  /* Try to copy IrDA nickname */
  if(name)
    strcpy(irnet_events.log[index].name, name);
  else
    irnet_events.log[index].name[0] = '\0';
  /* Copy hints */
  irnet_events.log[index].hints.word = hints;
  /* Try to get ppp unit number */
  if((ap != (irnet_socket *) NULL) && (ap->ppp_open))
    irnet_events.log[index].unit = ppp_unit_number(&ap->chan);
  else
    irnet_events.log[index].unit = -1;

  /* Increment the index
   * Note that we increment the index only after the event is written,
   * to make sure that the readers don't get garbage... */
  irnet_events.index = (index + 1) % IRNET_MAX_EVENTS;

  DEBUG(CTRL_INFO, "New event index is %d\n", irnet_events.index);

  /* Spin lock end */
  spin_unlock_bh(&irnet_events.spinlock);

  /* Now : wake up everybody waiting for events... */
  wake_up_interruptible_all(&irnet_events.rwait);

  DEXIT(CTRL_TRACE, "\n");
}

/************************* IRDA SUBROUTINES *************************/
/*
 * These are a bunch of subroutines called from other functions
 * down there, mostly common code or to improve readability...
 *
 * Note : we duplicate quite heavily some routines of af_irda.c,
 * because our input structure (self) is quite different
 * (struct irnet instead of struct irda_sock), which make sharing
 * the same code impossible (at least, without templates).
 */

/*------------------------------------------------------------------*/
/*
 * Function irda_open_tsap (self)
 *
 *    Open local Transport Service Access Point (TSAP)
 *
 * Create a IrTTP instance for us and set all the IrTTP callbacks.
 */
static inline int
irnet_open_tsap(irnet_socket *	self)
{
  notify_t	notify;		/* Callback structure */

  DENTER(IRDA_SR_TRACE, "(self=0x%p)\n", self);

  DABORT(self->tsap != NULL, -EBUSY, IRDA_SR_ERROR, "Already busy !\n");

  /* Initialize IrTTP callbacks to be used by the IrDA stack */
  irda_notify_init(&notify);
  notify.connect_confirm	= irnet_connect_confirm;
  notify.connect_indication	= irnet_connect_indication;
  notify.disconnect_indication	= irnet_disconnect_indication;
  notify.data_indication	= irnet_data_indication;
  /*notify.udata_indication	= NULL;*/
  notify.flow_indication	= irnet_flow_indication;
  notify.status_indication	= irnet_status_indication;
  notify.instance		= self;
  strlcpy(notify.name, IRNET_NOTIFY_NAME, sizeof(notify.name));

  /* Open an IrTTP instance */
  self->tsap = irttp_open_tsap(LSAP_ANY, DEFAULT_INITIAL_CREDIT,
			       &notify);
  DABORT(self->tsap == NULL, -ENOMEM,
	 IRDA_SR_ERROR, "Unable to allocate TSAP !\n");

  /* Remember which TSAP selector we actually got */
  self->stsap_sel = self->tsap->stsap_sel;

  DEXIT(IRDA_SR_TRACE, " - tsap=0x%p, sel=0x%X\n",
	self->tsap, self->stsap_sel);
  return 0;
}

/*------------------------------------------------------------------*/
/*
 * Function irnet_ias_to_tsap (self, result, value)
 *
 *    Examine an IAS object and extract TSAP
 *
 * We do an IAP query to find the TSAP associated with the IrNET service.
 * When IrIAP pass us the result of the query, this function look at
 * the return values to check for failures and extract the TSAP if
 * possible.
 * Also deallocate value
 * The failure is in self->errno
 * Return TSAP or -1
 */
static inline __u8
irnet_ias_to_tsap(irnet_socket *	self,
		  int			result,
		  struct ias_value *	value)
{
  __u8	dtsap_sel = 0;		/* TSAP we are looking for */

  DENTER(IRDA_SR_TRACE, "(self=0x%p)\n", self);

  /* By default, no error */
  self->errno = 0;

  /* Check if request succeeded */
  switch(result)
    {
      /* Standard errors : service not available */
    case IAS_CLASS_UNKNOWN:
    case IAS_ATTRIB_UNKNOWN:
      DEBUG(IRDA_SR_INFO, "IAS object doesn't exist ! (%d)\n", result);
      self->errno = -EADDRNOTAVAIL;
      break;

      /* Other errors, most likely IrDA stack failure */
    default :
      DEBUG(IRDA_SR_INFO, "IAS query failed ! (%d)\n", result);
      self->errno = -EHOSTUNREACH;
      break;

      /* Success : we got what we wanted */
    case IAS_SUCCESS:
      break;
    }

  /* Check what was returned to us */
  if(value != NULL)
    {
      /* What type of argument have we got ? */
      switch(value->type)
	{
	case IAS_INTEGER:
	  DEBUG(IRDA_SR_INFO, "result=%d\n", value->t.integer);
	  if(value->t.integer != -1)
	    /* Get the remote TSAP selector */
	    dtsap_sel = value->t.integer;
	  else
	    self->errno = -EADDRNOTAVAIL;
	  break;
	default:
	  self->errno = -EADDRNOTAVAIL;
	  DERROR(IRDA_SR_ERROR, "bad type ! (0x%X)\n", value->type);
	  break;
	}

      /* Cleanup */
      irias_delete_value(value);
    }
  else	/* value == NULL */
    {
      /* Nothing returned to us - usually result != SUCCESS */
      if(!(self->errno))
	{
	  DERROR(IRDA_SR_ERROR,
		 "IrDA bug : result == SUCCESS && value == NULL\n");
	  self->errno = -EHOSTUNREACH;
	}
    }
  DEXIT(IRDA_SR_TRACE, "\n");

  /* Return the TSAP */
  return dtsap_sel;
}

/*------------------------------------------------------------------*/
/*
 * Function irnet_find_lsap_sel (self)
 *
 *    Try to lookup LSAP selector in remote LM-IAS
 *
 * Basically, we start a IAP query, and then go to sleep. When the query
 * return, irnet_getvalue_confirm will wake us up, and we can examine the
 * result of the query...
 * Note that in some case, the query fail even before we go to sleep,
 * creating some races...
 */
static inline int
irnet_find_lsap_sel(irnet_socket *	self)
{
  DENTER(IRDA_SR_TRACE, "(self=0x%p)\n", self);

  /* This should not happen */
  DABORT(self->iriap, -EBUSY, IRDA_SR_ERROR, "busy with a previous query.\n");

  /* Create an IAP instance, will be closed in irnet_getvalue_confirm() */
  self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
			   irnet_getvalue_confirm);

  /* Treat unexpected signals as disconnect */
  self->errno = -EHOSTUNREACH;

  /* Query remote LM-IAS */
  iriap_getvaluebyclass_request(self->iriap, self->rsaddr, self->daddr,
				IRNET_SERVICE_NAME, IRNET_IAS_VALUE);

  /* The above request is non-blocking.
   * After a while, IrDA will call us back in irnet_getvalue_confirm()
   * We will then call irnet_ias_to_tsap() and finish the
   * connection procedure */

  DEXIT(IRDA_SR_TRACE, "\n");
  return 0;
}

/*------------------------------------------------------------------*/
/*
 * Function irnet_connect_tsap (self)
 *
 *    Initialise the TTP socket and initiate TTP connection
 *
 */
static inline int
irnet_connect_tsap(irnet_socket *	self)
{
  int		err;

  DENTER(IRDA_SR_TRACE, "(self=0x%p)\n", self);

  /* Open a local TSAP (an IrTTP instance) */
  err = irnet_open_tsap(self);
  if(err != 0)
    {
      clear_bit(0, &self->ttp_connect);
      DERROR(IRDA_SR_ERROR, "connect aborted!\n");
      return err;
    }

  /* Connect to remote device */
  err = irttp_connect_request(self->tsap, self->dtsap_sel,
			      self->rsaddr, self->daddr, NULL,
			      self->max_sdu_size_rx, NULL);
  if(err != 0)
    {
      clear_bit(0, &self->ttp_connect);
      DERROR(IRDA_SR_ERROR, "connect aborted!\n");
      return err;
    }

  /* The above call is non-blocking.
   * After a while, the IrDA stack will either call us back in
   * irnet_connect_confirm() or irnet_disconnect_indication()
   * See you there ;-) */

  DEXIT(IRDA_SR_TRACE, "\n");
  return err;
}

/*------------------------------------------------------------------*/
/*
 * Function irnet_discover_next_daddr (self)
 *
 *    Query the IrNET TSAP of the next device in the log.
 *
 * Used in the TSAP discovery procedure.
 */
static inline int
irnet_discover_next_daddr(irnet_socket *	self)
{
  /* Close the last instance of IrIAP, and open a new one.
   * We can't reuse the IrIAP instance in the IrIAP callback */
  if(self->iriap)
    {
      iriap_close(self->iriap);
      self->iriap = NULL;
    }
  /* Create a new IAP instance */
  self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
			   irnet_discovervalue_confirm);
  if(self->iriap == NULL)
    return -ENOMEM;

  /* Next discovery - before the call to avoid races */
  self->disco_index++;

  /* Check if we have one more address to try */
  if(self->disco_index < self->disco_number)
    {
      /* Query remote LM-IAS */
      iriap_getvaluebyclass_request(self->iriap,
				    self->discoveries[self->disco_index].saddr,
				    self->discoveries[self->disco_index].daddr,
				    IRNET_SERVICE_NAME, IRNET_IAS_VALUE);
      /* The above request is non-blocking.
       * After a while, IrDA will call us back in irnet_discovervalue_confirm()
       * We will then call irnet_ias_to_tsap() and come back here again... */
      return 0;
    }
  else
    return 1;
}

/*------------------------------------------------------------------*/
/*
 * Function irnet_discover_daddr_and_lsap_sel (self)
 *
 *    This try to find a device with the requested service.
 *
 * Initiate a TSAP discovery procedure.
 * It basically look into the discovery log. For each address in the list,
 * it queries the LM-IAS of the device to find if this device offer
 * the requested service.
 * If there is more than one node supporting the service, we complain
 * to the user (it should move devices around).
 * If we find one node which have the requested TSAP, we connect to it.
 *
 * This function just start the whole procedure. It request the discovery
 * log and submit the first IAS query.
 * The bulk of the job is handled in irnet_discovervalue_confirm()
 *
 * Note : this procedure fails if there is more than one device in range
 * on the same dongle, because IrLMP doesn't disconnect the LAP when the
 * last LSAP is closed. Moreover, we would need to wait the LAP
 * disconnection...
 */
static inline int
irnet_discover_daddr_and_lsap_sel(irnet_socket *	self)
{
  int	ret;

  DENTER(IRDA_SR_TRACE, "(self=0x%p)\n", self);

  /* Ask lmp for the current discovery log */
  self->discoveries = irlmp_get_discoveries(&self->disco_number, self->mask,
					    DISCOVERY_DEFAULT_SLOTS);

  /* Check if the we got some results */
  if(self->discoveries == NULL)
    {
      self->disco_number = -1;
      clear_bit(0, &self->ttp_connect);
      DRETURN(-ENETUNREACH, IRDA_SR_INFO, "No Cachelog...\n");
    }
  DEBUG(IRDA_SR_INFO, "Got the log (0x%p), size is %d\n",
	self->discoveries, self->disco_number);

  /* Start with the first discovery */
  self->disco_index = -1;
  self->daddr = DEV_ADDR_ANY;

  /* This will fail if the log is empty - this is non-blocking */
  ret = irnet_discover_next_daddr(self);
  if(ret)
    {
      /* Close IAP */
      if(self->iriap)
	iriap_close(self->iriap);
      self->iriap = NULL;

      /* Cleanup our copy of the discovery log */
      kfree(self->discoveries);
      self->discoveries = NULL;

      clear_bit(0, &self->ttp_connect);
      DRETURN(-ENETUNREACH, IRDA_SR_INFO, "Cachelog empty...\n");
    }

  /* Follow me in irnet_discovervalue_confirm() */

  DEXIT(IRDA_SR_TRACE, "\n");
  return 0;
}

/*------------------------------------------------------------------*/
/*
 * Function irnet_dname_to_daddr (self)
 *
 *    Convert an IrDA nickname to a valid IrDA address
 *
 * It basically look into the discovery log until there is a match.
 */
static inline int
irnet_dname_to_daddr(irnet_socket *	self)
{
  struct irda_device_info *discoveries;	/* Copy of the discovery log */
  int	number;			/* Number of nodes in the log */
  int	i;

  DENTER(IRDA_SR_TRACE, "(self=0x%p)\n", self);

  /* Ask lmp for the current discovery log */
  discoveries = irlmp_get_discoveries(&number, 0xffff,
				      DISCOVERY_DEFAULT_SLOTS);
  /* Check if the we got some results */
  if(discoveries == NULL)
    DRETURN(-ENETUNREACH, IRDA_SR_INFO, "Cachelog empty...\n");

  /*
   * Now, check all discovered devices (if any), and connect
   * client only about the services that the client is
   * interested in...
   */
  for(i = 0; i < number; i++)
    {
      /* Does the name match ? */
      if(!strncmp(discoveries[i].info, self->rname, NICKNAME_MAX_LEN))
	{
	  /* Yes !!! Get it.. */
	  self->daddr = discoveries[i].daddr;
	  DEBUG(IRDA_SR_INFO, "discovered device ``%s'' at address 0x%08x.\n",
		self->rname, self->daddr);
	  kfree(discoveries);
	  DEXIT(IRDA_SR_TRACE, "\n");
	  return 0;
	}
    }
  /* No luck ! */
  DEBUG(IRDA_SR_INFO, "cannot discover device ``%s'' !!!\n", self->rname);
  kfree(discoveries);
  return -EADDRNOTAVAIL;
}


/************************* SOCKET ROUTINES *************************/
/*
 * This are the main operations on IrNET sockets, basically to create
 * and destroy IrNET sockets. These are called from the PPP part...
 */

/*------------------------------------------------------------------*/
/*
 * Create a IrNET instance : just initialise some parameters...
 */
int
irda_irnet_create(irnet_socket *	self)
{
  DENTER(IRDA_SOCK_TRACE, "(self=0x%p)\n", self);

  self->magic = IRNET_MAGIC;	/* Paranoia */

  self->ttp_open = 0;		/* Prevent higher layer from accessing IrTTP */
  self->ttp_connect = 0;	/* Not connecting yet */
  self->rname[0] = '\0';	/* May be set via control channel */
  self->rdaddr = DEV_ADDR_ANY;	/* May be set via control channel */
  self->rsaddr = DEV_ADDR_ANY;	/* May be set via control channel */
  self->daddr = DEV_ADDR_ANY;	/* Until we get connected */
  self->saddr = DEV_ADDR_ANY;	/* Until we get connected */
  self->max_sdu_size_rx = TTP_SAR_UNBOUND;

  /* Register as a client with IrLMP */
  self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
#ifdef DISCOVERY_NOMASK
  self->mask = 0xffff;		/* For W2k compatibility */
#else /* DISCOVERY_NOMASK */
  self->mask = irlmp_service_to_hint(S_LAN);
#endif /* DISCOVERY_NOMASK */
  self->tx_flow = FLOW_START;	/* Flow control from IrTTP */

  INIT_WORK(&self->disconnect_work, irnet_ppp_disconnect);

  DEXIT(IRDA_SOCK_TRACE, "\n");
  return 0;
}

/*------------------------------------------------------------------*/
/*
 * Connect to the other side :
 *	o convert device name to an address
 *	o find the socket number (dlsap)
 *	o Establish the connection
 *
 * Note : We no longer mimic af_irda. The IAS query for finding the TSAP
 * is done asynchronously, like the TTP connection. This allow us to
 * call this function from any context (not only process).
 * The downside is that following what's happening in there is tricky
 * because it involve various functions all over the place...
 */
int
irda_irnet_connect(irnet_socket *	self)
{
  int		err;

  DENTER(IRDA_SOCK_TRACE, "(self=0x%p)\n", self);

  /* Check if we are already trying to connect.
   * Because irda_irnet_connect() can be called directly by pppd plus
   * packet retries in ppp_generic and connect may take time, plus we may
   * race with irnet_connect_indication(), we need to be careful there... */
  if(test_and_set_bit(0, &self->ttp_connect))
    DRETURN(-EBUSY, IRDA_SOCK_INFO, "Already connecting...\n");
  if((self->iriap != NULL) || (self->tsap != NULL))
    DERROR(IRDA_SOCK_ERROR, "Socket not cleaned up...\n");

  /* Insert ourselves in the hashbin so that the IrNET server can find us.
   * Notes : 4th arg is string of 32 char max and must be null terminated
   *	     When 4th arg is used (string), 3rd arg isn't (int)
   *	     Can't re-insert (MUST remove first) so check for that... */
  if((irnet_server.running) && (self->q.q_next == NULL))
    {
      spin_lock_bh(&irnet_server.spinlock);
      hashbin_insert(irnet_server.list, (irda_queue_t *) self, 0, self->rname);
      spin_unlock_bh(&irnet_server.spinlock);
      DEBUG(IRDA_SOCK_INFO, "Inserted ``%s'' in hashbin...\n", self->rname);
    }

  /* If we don't have anything (no address, no name) */
  if((self->rdaddr == DEV_ADDR_ANY) && (self->rname[0] == '\0'))
    {
      /* Try to find a suitable address */
      if((err = irnet_discover_daddr_and_lsap_sel(self)) != 0)
	DRETURN(err, IRDA_SOCK_INFO, "auto-connect failed!\n");
      /* In most cases, the call above is non-blocking */
    }
  else
    {
      /* If we have only the name (no address), try to get an address */
      if(self->rdaddr == DEV_ADDR_ANY)
	{
	  if((err = irnet_dname_to_daddr(self)) != 0)
	    DRETURN(err, IRDA_SOCK_INFO, "name connect failed!\n");
	}
      else
	/* Use the requested destination address */
	self->daddr = self->rdaddr;

      /* Query remote LM-IAS to find LSAP selector */
      irnet_find_lsap_sel(self);
      /* The above call is non blocking */
    }

  /* At this point, we are waiting for the IrDA stack to call us back,
   * or we have already failed.
   * We will finish the connection procedure in irnet_connect_tsap().
   */
  DEXIT(IRDA_SOCK_TRACE, "\n");
  return 0;
}

/*------------------------------------------------------------------*/
/*
 * Function irda_irnet_destroy(self)
 *
 *    Destroy irnet instance
 *
 * Note : this need to be called from a process context.
 */
void
irda_irnet_destroy(irnet_socket *	self)
{
  DENTER(IRDA_SOCK_TRACE, "(self=0x%p)\n", self);
  if(self == NULL)
    return;

  /* Remove ourselves from hashbin (if we are queued in hashbin)
   * Note : `irnet_server.running' protect us from calls in hashbin_delete() */
  if((irnet_server.running) && (self->q.q_next != NULL))
    {
      struct irnet_socket *	entry;
      DEBUG(IRDA_SOCK_INFO, "Removing from hash..\n");
      spin_lock_bh(&irnet_server.spinlock);
      entry = hashbin_remove_this(irnet_server.list, (irda_queue_t *) self);
      self->q.q_next = NULL;
      spin_unlock_bh(&irnet_server.spinlock);
      DASSERT(entry == self, , IRDA_SOCK_ERROR, "Can't remove from hash.\n");
    }

  /* If we were connected, post a message */
  if(test_bit(0, &self->ttp_open))
    {
      /* Note : as the disconnect comes from ppp_generic, the unit number
       * doesn't exist anymore when we post the event, so we need to pass
       * NULL as the first arg... */
      irnet_post_event(NULL, IRNET_DISCONNECT_TO,
		       self->saddr, self->daddr, self->rname, 0);
    }

  /* Prevent various IrDA callbacks from messing up things
   * Need to be first */
  clear_bit(0, &self->ttp_connect);

  /* Prevent higher layer from accessing IrTTP */
  clear_bit(0, &self->ttp_open);

  /* Unregister with IrLMP */
  irlmp_unregister_client(self->ckey);

  /* Unregister with LM-IAS */
  if(self->iriap)
    {
      iriap_close(self->iriap);
      self->iriap = NULL;
    }

  /* Cleanup eventual discoveries from connection attempt or control channel */
  if(self->discoveries != NULL)
    {
      /* Cleanup our copy of the discovery log */
      kfree(self->discoveries);
      self->discoveries = NULL;
    }

  /* Close our IrTTP connection */
  if(self->tsap)
    {
      DEBUG(IRDA_SOCK_INFO, "Closing our TTP connection.\n");
      irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
      irttp_close_tsap(self->tsap);
      self->tsap = NULL;
    }
  self->stsap_sel = 0;

  DEXIT(IRDA_SOCK_TRACE, "\n");
}


/************************** SERVER SOCKET **************************/
/*
 * The IrNET service is composed of one server socket and a variable
 * number of regular IrNET sockets. The server socket is supposed to
 * handle incoming connections and redirect them to one IrNET sockets.
 * It's a superset of the regular IrNET socket, but has a very distinct
 * behaviour...
 */

/*------------------------------------------------------------------*/
/*
 * Function irnet_daddr_to_dname (self)
 *
 *    Convert an IrDA address to a IrDA nickname
 *
 * It basically look into the discovery log until there is a match.
 */
static inline int
irnet_daddr_to_dname(irnet_socket *	self)
{
  struct irda_device_info *discoveries;	/* Copy of the discovery log */
  int	number;			/* Number of nodes in the log */
  int	i;

  DENTER(IRDA_SERV_TRACE, "(self=0x%p)\n", self);

  /* Ask lmp for the current discovery log */
  discoveries = irlmp_get_discoveries(&number, 0xffff,
				      DISCOVERY_DEFAULT_SLOTS);
  /* Check if the we got some results */
  if (discoveries == NULL)
    DRETURN(-ENETUNREACH, IRDA_SERV_INFO, "Cachelog empty...\n");

  /* Now, check all discovered devices (if any) */
  for(i = 0; i < number; i++)
    {
      /* Does the name match ? */
      if(discoveries[i].daddr == self->daddr)
	{
	  /* Yes !!! Get it.. */
	  strlcpy(self->rname, discoveries[i].info, sizeof(self->rname));
	  self->rname[sizeof(self->rname) - 1] = '\0';
	  DEBUG(IRDA_SERV_INFO, "Device 0x%08x is in fact ``%s''.\n",
		self->daddr, self->rname);
	  kfree(discoveries);
	  DEXIT(IRDA_SERV_TRACE, "\n");
	  return 0;
	}
    }
  /* No luck ! */
  DEXIT(IRDA_SERV_INFO, ": cannot discover device 0x%08x !!!\n", self->daddr);
  kfree(discoveries);
  return -EADDRNOTAVAIL;
}

/*------------------------------------------------------------------*/
/*
 * Function irda_find_socket (self)
 *
 *    Find the correct IrNET socket
 *
 * Look into the list of IrNET sockets and finds one with the right
 * properties...
 */
static inline irnet_socket *
irnet_find_socket(irnet_socket *	self)
{
  irnet_socket *	new = (irnet_socket *) NULL;
  int			err;

  DENTER(IRDA_SERV_TRACE, "(self=0x%p)\n", self);

  /* Get the addresses of the requester */
  self->daddr = irttp_get_daddr(self->tsap);
  self->saddr = irttp_get_saddr(self->tsap);

  /* Try to get the IrDA nickname of the requester */
  err = irnet_daddr_to_dname(self);

  /* Protect access to the instance list */
  spin_lock_bh(&irnet_server.spinlock);

  /* So now, try to get an socket having specifically
   * requested that nickname */
  if(err == 0)
    {
      new = (irnet_socket *) hashbin_find(irnet_server.list,
					  0, self->rname);
      if(new)
	DEBUG(IRDA_SERV_INFO, "Socket 0x%p matches rname ``%s''.\n",
	      new, new->rname);
    }

  /* If no name matches, try to find an socket by the destination address */
  /* It can be either the requested destination address (set via the
   * control channel), or the current destination address if the
   * socket is in the middle of a connection request */
  if(new == (irnet_socket *) NULL)
    {
      new = (irnet_socket *) hashbin_get_first(irnet_server.list);
      while(new !=(irnet_socket *) NULL)
	{
	  /* Does it have the same address ? */
	  if((new->rdaddr == self->daddr) || (new->daddr == self->daddr))
	    {
	      /* Yes !!! Get it.. */
	      DEBUG(IRDA_SERV_INFO, "Socket 0x%p matches daddr %#08x.\n",
		    new, self->daddr);
	      break;
	    }
	  new = (irnet_socket *) hashbin_get_next(irnet_server.list);
	}
    }

  /* If we don't have any socket, get the first unconnected socket */
  if(new == (irnet_socket *) NULL)
    {
      new = (irnet_socket *) hashbin_get_first(irnet_server.list);
      while(new !=(irnet_socket *) NULL)
	{
	  /* Is it available ? */
	  if(!(test_bit(0, &new->ttp_open)) && (new->rdaddr == DEV_ADDR_ANY) &&
	     (new->rname[0] == '\0') && (new->ppp_open))
	    {
	      /* Yes !!! Get it.. */
	      DEBUG(IRDA_SERV_INFO, "Socket 0x%p is free.\n",
		    new);
	      break;
	    }
	  new = (irnet_socket *) hashbin_get_next(irnet_server.list);
	}
    }

  /* Spin lock end */
  spin_unlock_bh(&irnet_server.spinlock);

  DEXIT(IRDA_SERV_TRACE, " - new = 0x%p\n", new);
  return new;
}

/*------------------------------------------------------------------*/
/*
 * Function irda_connect_socket (self)
 *
 *    Connect an incoming connection to the socket
 *
 */
static inline int
irnet_connect_socket(irnet_socket *	server,
		     irnet_socket *	new,
		     struct qos_info *	qos,
		     __u32		max_sdu_size,
		     __u8		max_header_size)
{
  DENTER(IRDA_SERV_TRACE, "(server=0x%p, new=0x%p)\n",
	 server, new);

  /* Now attach up the new socket */
  new->tsap = irttp_dup(server->tsap, new);
  DABORT(new->tsap == NULL, -1, IRDA_SERV_ERROR, "dup failed!\n");

  /* Set up all the relevant parameters on the new socket */
  new->stsap_sel = new->tsap->stsap_sel;
  new->dtsap_sel = new->tsap->dtsap_sel;
  new->saddr = irttp_get_saddr(new->tsap);
  new->daddr = irttp_get_daddr(new->tsap);

  new->max_header_size = max_header_size;
  new->max_sdu_size_tx = max_sdu_size;
  new->max_data_size   = max_sdu_size;
#ifdef STREAM_COMPAT
  /* If we want to receive "stream sockets" */
  if(max_sdu_size == 0)
    new->max_data_size = irttp_get_max_seg_size(new->tsap);
#endif /* STREAM_COMPAT */

  /* Clean up the original one to keep it in listen state */
  irttp_listen(server->tsap);

  /* Send a connection response on the new socket */
  irttp_connect_response(new->tsap, new->max_sdu_size_rx, NULL);

  /* Allow PPP to send its junk over the new socket... */
  set_bit(0, &new->ttp_open);

  /* Not connecting anymore, and clean up last possible remains
   * of connection attempts on the socket */
  clear_bit(0, &new->ttp_connect);
  if(new->iriap)
    {
      iriap_close(new->iriap);
      new->iriap = NULL;
    }
  if(new->discoveries != NULL)
    {
      kfree(new->discoveries);
      new->discoveries = NULL;
    }

#ifdef CONNECT_INDIC_KICK
  /* As currently we don't block packets in ppp_irnet_send() while passive,
   * this is not really needed...
   * Also, not doing it give IrDA a chance to finish the setup properly
   * before being swamped with packets... */
  ppp_output_wakeup(&new->chan);
#endif /* CONNECT_INDIC_KICK */

  /* Notify the control channel */
  irnet_post_event(new, IRNET_CONNECT_FROM,
		   new->saddr, new->daddr, server->rname, 0);

  DEXIT(IRDA_SERV_TRACE, "\n");
  return 0;
}

/*------------------------------------------------------------------*/
/*
 * Function irda_disconnect_server (self)
 *
 *    Cleanup the server socket when the incoming connection abort
 *
 */
static inline void
irnet_disconnect_server(irnet_socket *	self,
			struct sk_buff *skb)
{
  DENTER(IRDA_SERV_TRACE, "(self=0x%p)\n", self);

  /* Put the received packet in the black hole */
  kfree_skb(skb);

#ifdef FAIL_SEND_DISCONNECT
  /* Tell the other party we don't want to be connected */
  /* Hum... Is it the right thing to do ? And do we need to send
   * a connect response before ? It looks ok without this... */
  irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
#endif /* FAIL_SEND_DISCONNECT */

  /* Notify the control channel (see irnet_find_socket()) */
  irnet_post_event(NULL, IRNET_REQUEST_FROM,
		   self->saddr, self->daddr, self->rname, 0);

  /* Clean up the server to keep it in listen state */
  irttp_listen(self->tsap);

  DEXIT(IRDA_SERV_TRACE, "\n");
}

/*------------------------------------------------------------------*/
/*
 * Function irda_setup_server (self)
 *
 *    Create a IrTTP server and set it up...
 *
 * Register the IrLAN hint bit, create a IrTTP instance for us,
 * set all the IrTTP callbacks and create an IrIAS entry...
 */
static inline int
irnet_setup_server(void)
{
  __u16		hints;

  DENTER(IRDA_SERV_TRACE, "()\n");

  /* Initialise the regular socket part of the server */
  irda_irnet_create(&irnet_server.s);

  /* Open a local TSAP (an IrTTP instance) for the server */
  irnet_open_tsap(&irnet_server.s);

  /* PPP part setup */
  irnet_server.s.ppp_open = 0;
  irnet_server.s.chan.private = NULL;
  irnet_server.s.file = NULL;

  /* Get the hint bit corresponding to IrLAN */
  /* Note : we overload the IrLAN hint bit. As it is only a "hint", and as
   * we provide roughly the same functionality as IrLAN, this is ok.
   * In fact, the situation is similar as JetSend overloading the Obex hint
   */
  hints = irlmp_service_to_hint(S_LAN);

#ifdef ADVERTISE_HINT
  /* Register with IrLMP as a service (advertise our hint bit) */
  irnet_server.skey = irlmp_register_service(hints);
#endif /* ADVERTISE_HINT */

  /* Register with LM-IAS (so that people can connect to us) */
  irnet_server.ias_obj = irias_new_object(IRNET_SERVICE_NAME, jiffies);
  irias_add_integer_attrib(irnet_server.ias_obj, IRNET_IAS_VALUE,
			   irnet_server.s.stsap_sel, IAS_KERNEL_ATTR);
  irias_insert_object(irnet_server.ias_obj);

#ifdef DISCOVERY_EVENTS
  /* Tell IrLMP we want to be notified of newly discovered nodes */
  irlmp_update_client(irnet_server.s.ckey, hints,
		      irnet_discovery_indication, irnet_expiry_indication,
		      (void *) &irnet_server.s);
#endif

  DEXIT(IRDA_SERV_TRACE, " - self=0x%p\n", &irnet_server.s);
  return 0;
}

/*------------------------------------------------------------------*/
/*
 * Function irda_destroy_server (self)
 *
 *    Destroy the IrTTP server...
 *
 * Reverse of the previous function...
 */
static inline void
irnet_destroy_server(void)
{
  DENTER(IRDA_SERV_TRACE, "()\n");

#ifdef ADVERTISE_HINT
  /* Unregister with IrLMP */
  irlmp_unregister_service(irnet_server.skey);
#endif /* ADVERTISE_HINT */

  /* Unregister with LM-IAS */
  if(irnet_server.ias_obj)
    irias_delete_object(irnet_server.ias_obj);

  /* Cleanup the socket part */
  irda_irnet_destroy(&irnet_server.s);

  DEXIT(IRDA_SERV_TRACE, "\n");
}


/************************ IRDA-TTP CALLBACKS ************************/
/*
 * When we create a IrTTP instance, we pass to it a set of callbacks
 * that IrTTP will call in case of various events.
 * We take care of those events here.
 */

/*------------------------------------------------------------------*/
/*
 * Function irnet_data_indication (instance, sap, skb)
 *
 *    Received some data from TinyTP. Just queue it on the receive queue
 *
 */
static int
irnet_data_indication(void *	instance,
		      void *	sap,
		      struct sk_buff *skb)
{
  irnet_socket *	ap = (irnet_socket *) instance;
  unsigned char *	p;
  int			code = 0;

  DENTER(IRDA_TCB_TRACE, "(self/ap=0x%p, skb=0x%p)\n",
	 ap, skb);
  DASSERT(skb != NULL, 0, IRDA_CB_ERROR, "skb is NULL !!!\n");

  /* Check is ppp is ready to receive our packet */
  if(!ap->ppp_open)
    {
      DERROR(IRDA_CB_ERROR, "PPP not ready, dropping packet...\n");
      /* When we return error, TTP will need to requeue the skb and
       * will stop the sender. IrTTP will stall until we send it a
       * flow control request... */
      return -ENOMEM;
    }

  /* strip address/control field if present */
  p = skb->data;
  if((p[0] == PPP_ALLSTATIONS) && (p[1] == PPP_UI))
    {
      /* chop off address/control */
      if(skb->len < 3)
	goto err_exit;
      p = skb_pull(skb, 2);
    }

  /* decompress protocol field if compressed */
  if(p[0] & 1)
    {
      /* protocol is compressed */
      skb_push(skb, 1)[0] = 0;
    }
  else
    if(skb->len < 2)
      goto err_exit;

  /* pass to generic ppp layer */
  /* Note : how do I know if ppp can accept or not the packet ? This is
   * essential if I want to manage flow control smoothly... */
  ppp_input(&ap->chan, skb);

  DEXIT(IRDA_TCB_TRACE, "\n");
  return 0;

 err_exit:
  DERROR(IRDA_CB_ERROR, "Packet too small, dropping...\n");
  kfree_skb(skb);
  ppp_input_error(&ap->chan, code);
  return 0;	/* Don't return an error code, only for flow control... */
}

/*------------------------------------------------------------------*/
/*
 * Function irnet_disconnect_indication (instance, sap, reason, skb)
 *
 *    Connection has been closed. Chech reason to find out why
 *
 * Note : there are many cases where we come here :
 *	o attempted to connect, timeout
 *	o connected, link is broken, LAP has timeout
 *	o connected, other side close the link
 *	o connection request on the server not handled
 */
static void
irnet_disconnect_indication(void *	instance,
			    void *	sap,
			    LM_REASON	reason,
			    struct sk_buff *skb)
{
  irnet_socket *	self = (irnet_socket *) instance;
  int			test_open;
  int			test_connect;

  DENTER(IRDA_TCB_TRACE, "(self=0x%p)\n", self);
  DASSERT(self != NULL, , IRDA_CB_ERROR, "Self is NULL !!!\n");

  /* Don't care about it, but let's not leak it */
  if(skb)
    dev_kfree_skb(skb);

  /* Prevent higher layer from accessing IrTTP */
  test_open = test_and_clear_bit(0, &self->ttp_open);
  /* Not connecting anymore...
   * (note : TSAP is open, so IAP callbacks are no longer pending...) */
  test_connect = test_and_clear_bit(0, &self->ttp_connect);

  /* If both self->ttp_open and self->ttp_connect are NULL, it mean that we
   * have a race condition with irda_irnet_destroy() or
   * irnet_connect_indication(), so don't mess up tsap...
   */
  if(!(test_open || test_connect))
    {
      DERROR(IRDA_CB_ERROR, "Race condition detected...\n");
      return;
    }

  /* If we were active, notify the control channel */
  if(test_open)
    irnet_post_event(self, IRNET_DISCONNECT_FROM,
		     self->saddr, self->daddr, self->rname, 0);
  else
    /* If we were trying to connect, notify the control channel */
    if((self->tsap) && (self != &irnet_server.s))
      irnet_post_event(self, IRNET_NOANSWER_FROM,
		       self->saddr, self->daddr, self->rname, 0);

  /* Close our IrTTP connection, cleanup tsap */
  if((self->tsap) && (self != &irnet_server.s))
    {
      DEBUG(IRDA_CB_INFO, "Closing our TTP connection.\n");
      irttp_close_tsap(self->tsap);
      self->tsap = NULL;
    }
  /* Cleanup the socket in case we want to reconnect in ppp_output_wakeup() */
  self->stsap_sel = 0;
  self->daddr = DEV_ADDR_ANY;
  self->tx_flow = FLOW_START;

  /* Deal with the ppp instance if it's still alive */
  if(self->ppp_open)
    {
      if(test_open)
	{
	  /* ppp_unregister_channel() wants a user context. */
	  schedule_work(&self->disconnect_work);
	}
      else
	{
	  /* If we were trying to connect, flush (drain) ppp_generic
	   * Tx queue (most often we have blocked it), which will
	   * trigger an other attempt to connect. If we are passive,
	   * this will empty the Tx queue after last try. */
	  ppp_output_wakeup(&self->chan);
	}
    }

  DEXIT(IRDA_TCB_TRACE, "\n");
}

/*------------------------------------------------------------------*/
/*
 * Function irnet_connect_confirm (instance, sap, qos, max_sdu_size, skb)
 *
 *    Connections has been confirmed by the remote device
 *
 */
static void
irnet_connect_confirm(void *	instance,
		      void *	sap,
		      struct qos_info *qos,
		      __u32	max_sdu_size,
		      __u8	max_header_size,
		      struct sk_buff *skb)
{
  irnet_socket *	self = (irnet_socket *) instance;

  DENTER(IRDA_TCB_TRACE, "(self=0x%p)\n", self);

  /* Check if socket is closing down (via irda_irnet_destroy()) */
  if(! test_bit(0, &self->ttp_connect))
    {
      DERROR(IRDA_CB_ERROR, "Socket no longer connecting. Ouch !\n");
      return;
    }

  /* How much header space do we need to reserve */
  self->max_header_size = max_header_size;

  /* IrTTP max SDU size in transmit direction */
  self->max_sdu_size_tx = max_sdu_size;
  self->max_data_size = max_sdu_size;
#ifdef STREAM_COMPAT
  if(max_sdu_size == 0)
    self->max_data_size = irttp_get_max_seg_size(self->tsap);
#endif /* STREAM_COMPAT */

  /* At this point, IrLMP has assigned our source address */
  self->saddr = irttp_get_saddr(self->tsap);

  /* Allow higher layer to access IrTTP */
  set_bit(0, &self->ttp_open);
  clear_bit(0, &self->ttp_connect);	/* Not racy, IrDA traffic is serial */
  /* Give a kick in the ass of ppp_generic so that he sends us some data */
  ppp_output_wakeup(&self->chan);

  /* Check size of received packet */
  if(skb->len > 0)
    {
#ifdef PASS_CONNECT_PACKETS
      DEBUG(IRDA_CB_INFO, "Passing connect packet to PPP.\n");
      /* Try to pass it to PPP */
      irnet_data_indication(instance, sap, skb);
#else /* PASS_CONNECT_PACKETS */
      DERROR(IRDA_CB_ERROR, "Dropping non empty packet.\n");
      kfree_skb(skb);	/* Note : will be optimised with other kfree... */
#endif /* PASS_CONNECT_PACKETS */
    }
  else
    kfree_skb(skb);

  /* Notify the control channel */
  irnet_post_event(self, IRNET_CONNECT_TO,
		   self->saddr, self->daddr, self->rname, 0);

  DEXIT(IRDA_TCB_TRACE, "\n");
}

/*------------------------------------------------------------------*/
/*
 * Function irnet_flow_indication (instance, sap, flow)
 *
 *    Used by TinyTP to tell us if it can accept more data or not
 *
 */
static void
irnet_flow_indication(void *	instance,
		      void *	sap,
		      LOCAL_FLOW flow)
{
  irnet_socket *	self = (irnet_socket *) instance;
  LOCAL_FLOW		oldflow = self->tx_flow;

  DENTER(IRDA_TCB_TRACE, "(self=0x%p, flow=%d)\n", self, flow);

  /* Update our state */
  self->tx_flow = flow;

  /* Check what IrTTP want us to do... */
  switch(flow)
    {
    case FLOW_START:
      DEBUG(IRDA_CB_INFO, "IrTTP wants us to start again\n");
      /* Check if we really need to wake up PPP */
      if(oldflow == FLOW_STOP)
	ppp_output_wakeup(&self->chan);
      else
	DEBUG(IRDA_CB_INFO, "But we were already transmitting !!!\n");
      break;
    case FLOW_STOP:
      DEBUG(IRDA_CB_INFO, "IrTTP wants us to slow down\n");
      break;
    default:
      DEBUG(IRDA_CB_INFO, "Unknown flow command!\n");
      break;
    }

  DEXIT(IRDA_TCB_TRACE, "\n");
}

/*------------------------------------------------------------------*/
/*
 * Function irnet_status_indication (instance, sap, reason, skb)
 *
 *    Link (IrLAP) status report.
 *
 */
static void
irnet_status_indication(void *	instance,
			LINK_STATUS link,
			LOCK_STATUS lock)
{
  irnet_socket *	self = (irnet_socket *) instance;

  DENTER(IRDA_TCB_TRACE, "(self=0x%p)\n", self);
  DASSERT(self != NULL, , IRDA_CB_ERROR, "Self is NULL !!!\n");

  /* We can only get this event if we are connected */
  switch(link)
    {
    case STATUS_NO_ACTIVITY:
      irnet_post_event(self, IRNET_BLOCKED_LINK,
		       self->saddr, self->daddr, self->rname, 0);
      break;
    default:
      DEBUG(IRDA_CB_INFO, "Unknown status...\n");
    }

  DEXIT(IRDA_TCB_TRACE, "\n");
}

/*------------------------------------------------------------------*/
/*
 * Function irnet_connect_indication(instance, sap, qos, max_sdu_size, userdata)
 *
 *    Incoming connection
 *
 * In theory, this function is called only on the server socket.
 * Some other node is attempting to connect to the IrNET service, and has
 * sent a connection request on our server socket.
 * We just redirect the connection to the relevant IrNET socket.
 *
 * Note : we also make sure that between 2 irnet nodes, there can
 * exist only one irnet connection.
 */
static void
irnet_connect_indication(void *		instance,
			 void *		sap,
			 struct qos_info *qos,
			 __u32		max_sdu_size,
			 __u8		max_header_size,
			 struct sk_buff *skb)
{
  irnet_socket *	server = &irnet_server.s;
  irnet_socket *	new = (irnet_socket *) NULL;

  DENTER(IRDA_TCB_TRACE, "(server=0x%p)\n", server);
  DASSERT(instance == &irnet_server, , IRDA_CB_ERROR,
	  "Invalid instance (0x%p) !!!\n", instance);
  DASSERT(sap == irnet_server.s.tsap, , IRDA_CB_ERROR, "Invalid sap !!!\n");

  /* Try to find the most appropriate IrNET socket */
  new = irnet_find_socket(server);

  /* After all this hard work, do we have an socket ? */
  if(new == (irnet_socket *) NULL)
    {
      DEXIT(IRDA_CB_INFO, ": No socket waiting for this connection.\n");
      irnet_disconnect_server(server, skb);
      return;
    }

  /* Is the socket already busy ? */
  if(test_bit(0, &new->ttp_open))
    {
      DEXIT(IRDA_CB_INFO, ": Socket already connected.\n");
      irnet_disconnect_server(server, skb);
      return;
    }

  /* The following code is a bit tricky, so need comments ;-)
   */
  /* If ttp_connect is set, the socket is trying to connect to the other
   * end and may have sent a IrTTP connection request and is waiting for
   * a connection response (that may never come).
   * Now, the pain is that the socket may have opened a tsap and is
   * waiting on it, while the other end is trying to connect to it on
   * another tsap.
   * Because IrNET can be peer to peer, we need to workaround this.
   * Furthermore, the way the irnetd script is implemented, the
   * target will create a second IrNET connection back to the
   * originator and expect the originator to bind this new connection
   * to the original PPPD instance.
   * And of course, if we don't use irnetd, we can have a race when
   * both side try to connect simultaneously, which could leave both
   * connections half closed (yuck).
   * Conclusions :
   *	1) The "originator" must accept the new connection and get rid
   *	   of the old one so that irnetd works
   *	2) One side must deny the new connection to avoid races,
   *	   but both side must agree on which side it is...
   * Most often, the originator is primary at the LAP layer.
   * Jean II
   */
  /* Now, let's look at the way I wrote the test...
   * We need to clear up the ttp_connect flag atomically to prevent
   * irnet_disconnect_indication() to mess up the tsap we are going to close.
   * We want to clear the ttp_connect flag only if we close the tsap,
   * otherwise we will never close it, so we need to check for primary
   * *before* doing the test on the flag.
   * And of course, ALLOW_SIMULT_CONNECT can disable this entirely...
   * Jean II
   */

  /* Socket already connecting ? On primary ? */
  if(0
#ifdef ALLOW_SIMULT_CONNECT
     || ((irttp_is_primary(server->tsap) == 1) &&	/* primary */
	 (test_and_clear_bit(0, &new->ttp_connect)))
#endif /* ALLOW_SIMULT_CONNECT */
     )
    {
      DERROR(IRDA_CB_ERROR, "Socket already connecting, but going to reuse it !\n");

      /* Cleanup the old TSAP if necessary - IrIAP will be cleaned up later */
      if(new->tsap != NULL)
	{
	  /* Close the old connection the new socket was attempting,
	   * so that we can hook it up to the new connection.
	   * It's now safe to do it... */
	  irttp_close_tsap(new->tsap);
	  new->tsap = NULL;
	}
    }
  else
    {
      /* Three options :
       * 1) socket was not connecting or connected : ttp_connect should be 0.
       * 2) we don't want to connect the socket because we are secondary or
       * ALLOW_SIMULT_CONNECT is undefined. ttp_connect should be 1.
       * 3) we are half way in irnet_disconnect_indication(), and it's a
       * nice race condition... Fortunately, we can detect that by checking
       * if tsap is still alive. On the other hand, we can't be in
       * irda_irnet_destroy() otherwise we would not have found this
       * socket in the hashbin.
       * Jean II */
      if((test_bit(0, &new->ttp_connect)) || (new->tsap != NULL))
	{
	  /* Don't mess this socket, somebody else in in charge... */
	  DERROR(IRDA_CB_ERROR, "Race condition detected, socket in use, abort connect...\n");
	  irnet_disconnect_server(server, skb);
	  return;
	}
    }

  /* So : at this point, we have a socket, and it is idle. Good ! */
  irnet_connect_socket(server, new, qos, max_sdu_size, max_header_size);

  /* Check size of received packet */
  if(skb->len > 0)
    {
#ifdef PASS_CONNECT_PACKETS
      DEBUG(IRDA_CB_INFO, "Passing connect packet to PPP.\n");
      /* Try to pass it to PPP */
      irnet_data_indication(new, new->tsap, skb);
#else /* PASS_CONNECT_PACKETS */
      DERROR(IRDA_CB_ERROR, "Dropping non empty packet.\n");
      kfree_skb(skb);	/* Note : will be optimised with other kfree... */
#endif /* PASS_CONNECT_PACKETS */
    }
  else
    kfree_skb(skb);

  DEXIT(IRDA_TCB_TRACE, "\n");
}


/********************** IRDA-IAS/LMP CALLBACKS **********************/
/*
 * These are the callbacks called by other layers of the IrDA stack,
 * mainly LMP for discovery and IAS for name queries.
 */

/*------------------------------------------------------------------*/
/*
 * Function irnet_getvalue_confirm (result, obj_id, value, priv)
 *
 *    Got answer from remote LM-IAS, just connect
 *
 * This is the reply to a IAS query we were doing to find the TSAP of
 * the device we want to connect to.
 * If we have found a valid TSAP, just initiate the TTP connection
 * on this TSAP.
 */
static void
irnet_getvalue_confirm(int	result,
		       __u16	obj_id,
		       struct ias_value *value,
		       void *	priv)
{
  irnet_socket *	self = (irnet_socket *) priv;

  DENTER(IRDA_OCB_TRACE, "(self=0x%p)\n", self);
  DASSERT(self != NULL, , IRDA_OCB_ERROR, "Self is NULL !!!\n");

  /* Check if already connected (via irnet_connect_socket())
   * or socket is closing down (via irda_irnet_destroy()) */
  if(! test_bit(0, &self->ttp_connect))
    {
      DERROR(IRDA_OCB_ERROR, "Socket no longer connecting. Ouch !\n");
      return;
    }

  /* We probably don't need to make any more queries */
  iriap_close(self->iriap);
  self->iriap = NULL;

  /* Post process the IAS reply */
  self->dtsap_sel = irnet_ias_to_tsap(self, result, value);

  /* If error, just go out */
  if(self->errno)
    {
      clear_bit(0, &self->ttp_connect);
      DERROR(IRDA_OCB_ERROR, "IAS connect failed ! (0x%X)\n", self->errno);
      return;
    }

  DEBUG(IRDA_OCB_INFO, "daddr = %08x, lsap = %d, starting IrTTP connection\n",
	self->daddr, self->dtsap_sel);

  /* Start up TTP - non blocking */
  irnet_connect_tsap(self);

  DEXIT(IRDA_OCB_TRACE, "\n");
}

/*------------------------------------------------------------------*/
/*
 * Function irnet_discovervalue_confirm (result, obj_id, value, priv)
 *
 *    Handle the TSAP discovery procedure state machine.
 *    Got answer from remote LM-IAS, try next device
 *
 * We are doing a  TSAP discovery procedure, and we got an answer to
 * a IAS query we were doing to find the TSAP on one of the address
 * in the discovery log.
 *
 * If we have found a valid TSAP for the first time, save it. If it's
 * not the first time we found one, complain.
 *
 * If we have more addresses in the log, just initiate a new query.
 * Note that those query may fail (see irnet_discover_daddr_and_lsap_sel())
 *
 * Otherwise, wrap up the procedure (cleanup), check if we have found
 * any device and connect to it.
 */
static void
irnet_discovervalue_confirm(int		result,
			    __u16	obj_id,
			    struct ias_value *value,
			    void *	priv)
{
  irnet_socket *	self = (irnet_socket *) priv;
  __u8			dtsap_sel;		/* TSAP we are looking for */

  DENTER(IRDA_OCB_TRACE, "(self=0x%p)\n", self);
  DASSERT(self != NULL, , IRDA_OCB_ERROR, "Self is NULL !!!\n");

  /* Check if already connected (via irnet_connect_socket())
   * or socket is closing down (via irda_irnet_destroy()) */
  if(! test_bit(0, &self->ttp_connect))
    {
      DERROR(IRDA_OCB_ERROR, "Socket no longer connecting. Ouch !\n");
      return;
    }

  /* Post process the IAS reply */
  dtsap_sel = irnet_ias_to_tsap(self, result, value);

  /* Have we got something ? */
  if(self->errno == 0)
    {
      /* We found the requested service */
      if(self->daddr != DEV_ADDR_ANY)
	{
	  DERROR(IRDA_OCB_ERROR, "More than one device in range supports IrNET...\n");
	}
      else
	{
	  /* First time we found that one, save it ! */
	  self->daddr = self->discoveries[self->disco_index].daddr;
	  self->dtsap_sel = dtsap_sel;
	}
    }

  /* If no failure */
  if((self->errno == -EADDRNOTAVAIL) || (self->errno == 0))
    {
      int	ret;

      /* Search the next node */
      ret = irnet_discover_next_daddr(self);
      if(!ret)
	{
	  /* In this case, the above request was non-blocking.
	   * We will return here after a while... */
	  return;
	}
      /* In this case, we have processed the last discovery item */
    }

  /* No more queries to be done (failure or last one) */

  /* We probably don't need to make any more queries */
  iriap_close(self->iriap);
  self->iriap = NULL;

  /* No more items : remove the log and signal termination */
  DEBUG(IRDA_OCB_INFO, "Cleaning up log (0x%p)\n",
	self->discoveries);
  if(self->discoveries != NULL)
    {
      /* Cleanup our copy of the discovery log */
      kfree(self->discoveries);
      self->discoveries = NULL;
    }
  self->disco_number = -1;

  /* Check out what we found */
  if(self->daddr == DEV_ADDR_ANY)
    {
      self->daddr = DEV_ADDR_ANY;
      clear_bit(0, &self->ttp_connect);
      DEXIT(IRDA_OCB_TRACE, ": cannot discover IrNET in any device !!!\n");
      return;
    }

  /* We have a valid address - just connect */

  DEBUG(IRDA_OCB_INFO, "daddr = %08x, lsap = %d, starting IrTTP connection\n",
	self->daddr, self->dtsap_sel);

  /* Start up TTP - non blocking */
  irnet_connect_tsap(self);

  DEXIT(IRDA_OCB_TRACE, "\n");
}

#ifdef DISCOVERY_EVENTS
/*------------------------------------------------------------------*/
/*
 * Function irnet_discovery_indication (discovery)
 *
 *    Got a discovery indication from IrLMP, post an event
 *
 * Note : IrLMP take care of matching the hint mask for us, and also
 * check if it is a "new" node for us...
 *
 * As IrLMP filter on the IrLAN hint bit, we get both IrLAN and IrNET
 * nodes, so it's only at connection time that we will know if the
 * node support IrNET, IrLAN or both. The other solution is to check
 * in IAS the PNP ids and service name.
 * Note : even if a node support IrNET (or IrLAN), it's no guarantee
 * that we will be able to connect to it, the node might already be
 * busy...
 *
 * One last thing : in some case, this function will trigger duplicate
 * discovery events. On the other hand, we should catch all
 * discoveries properly (i.e. not miss one). Filtering duplicate here
 * is to messy, so we leave that to user space...
 */
static void
irnet_discovery_indication(discinfo_t *		discovery,
			   DISCOVERY_MODE	mode,
			   void *		priv)
{
  irnet_socket *	self = &irnet_server.s;

  DENTER(IRDA_OCB_TRACE, "(self=0x%p)\n", self);
  DASSERT(priv == &irnet_server, , IRDA_OCB_ERROR,
	  "Invalid instance (0x%p) !!!\n", priv);

  DEBUG(IRDA_OCB_INFO, "Discovered new IrNET/IrLAN node %s...\n",
	discovery->info);

  /* Notify the control channel */
  irnet_post_event(NULL, IRNET_DISCOVER,
		   discovery->saddr, discovery->daddr, discovery->info,
		   get_unaligned((__u16 *)discovery->hints));

  DEXIT(IRDA_OCB_TRACE, "\n");
}

/*------------------------------------------------------------------*/
/*
 * Function irnet_expiry_indication (expiry)
 *
 *    Got a expiry indication from IrLMP, post an event
 *
 * Note : IrLMP take care of matching the hint mask for us, we only
 * check if it is a "new" node...
 */
static void
irnet_expiry_indication(discinfo_t *	expiry,
			DISCOVERY_MODE	mode,
			void *		priv)
{
  irnet_socket *	self = &irnet_server.s;

  DENTER(IRDA_OCB_TRACE, "(self=0x%p)\n", self);
  DASSERT(priv == &irnet_server, , IRDA_OCB_ERROR,
	  "Invalid instance (0x%p) !!!\n", priv);

  DEBUG(IRDA_OCB_INFO, "IrNET/IrLAN node %s expired...\n",
	expiry->info);

  /* Notify the control channel */
  irnet_post_event(NULL, IRNET_EXPIRE,
		   expiry->saddr, expiry->daddr, expiry->info,
		   get_unaligned((__u16 *)expiry->hints));

  DEXIT(IRDA_OCB_TRACE, "\n");
}
#endif /* DISCOVERY_EVENTS */


/*********************** PROC ENTRY CALLBACKS ***********************/
/*
 * We create a instance in the /proc filesystem, and here we take care
 * of that...
 */

#ifdef CONFIG_PROC_FS
static int
irnet_proc_show(struct seq_file *m, void *v)
{
  irnet_socket *	self;
  char *		state;
  int			i = 0;

  /* Get the IrNET server information... */
  seq_printf(m, "IrNET server - ");
  seq_printf(m, "IrDA state: %s, ",
		 (irnet_server.running ? "running" : "dead"));
  seq_printf(m, "stsap_sel: %02x, ", irnet_server.s.stsap_sel);
  seq_printf(m, "dtsap_sel: %02x\n", irnet_server.s.dtsap_sel);

  /* Do we need to continue ? */
  if(!irnet_server.running)
    return 0;

  /* Protect access to the instance list */
  spin_lock_bh(&irnet_server.spinlock);

  /* Get the sockets one by one... */
  self = (irnet_socket *) hashbin_get_first(irnet_server.list);
  while(self != NULL)
    {
      /* Start printing info about the socket. */
      seq_printf(m, "\nIrNET socket %d - ", i++);

      /* First, get the requested configuration */
      seq_printf(m, "Requested IrDA name: \"%s\", ", self->rname);
      seq_printf(m, "daddr: %08x, ", self->rdaddr);
      seq_printf(m, "saddr: %08x\n", self->rsaddr);

      /* Second, get all the PPP info */
      seq_printf(m, "	PPP state: %s",
		 (self->ppp_open ? "registered" : "unregistered"));
      if(self->ppp_open)
	{
	  seq_printf(m, ", unit: ppp%d",
			 ppp_unit_number(&self->chan));
	  seq_printf(m, ", channel: %d",
			 ppp_channel_index(&self->chan));
	  seq_printf(m, ", mru: %d",
			 self->mru);
	  /* Maybe add self->flags ? Later... */
	}

      /* Then, get all the IrDA specific info... */
      if(self->ttp_open)
	state = "connected";
      else
	if(self->tsap != NULL)
	  state = "connecting";
	else
	  if(self->iriap != NULL)
	    state = "searching";
	  else
	    if(self->ttp_connect)
	      state = "weird";
	    else
	      state = "idle";
      seq_printf(m, "\n	IrDA state: %s, ", state);
      seq_printf(m, "daddr: %08x, ", self->daddr);
      seq_printf(m, "stsap_sel: %02x, ", self->stsap_sel);
      seq_printf(m, "dtsap_sel: %02x\n", self->dtsap_sel);

      /* Next socket, please... */
      self = (irnet_socket *) hashbin_get_next(irnet_server.list);
    }

  /* Spin lock end */
  spin_unlock_bh(&irnet_server.spinlock);

  return 0;
}

static int irnet_proc_open(struct inode *inode, struct file *file)
{
	return single_open(file, irnet_proc_show, NULL);
}

static const struct file_operations irnet_proc_fops = {
	.owner		= THIS_MODULE,
	.open		= irnet_proc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};
#endif /* PROC_FS */


/********************** CONFIGURATION/CLEANUP **********************/
/*
 * Initialisation and teardown of the IrDA part, called at module
 * insertion and removal...
 */

/*------------------------------------------------------------------*/
/*
 * Prepare the IrNET layer for operation...
 */
int __init
irda_irnet_init(void)
{
  int		err = 0;

  DENTER(MODULE_TRACE, "()\n");

  /* Pure paranoia - should be redundant */
  memset(&irnet_server, 0, sizeof(struct irnet_root));

  /* Setup start of irnet instance list */
  irnet_server.list = hashbin_new(HB_NOLOCK);
  DABORT(irnet_server.list == NULL, -ENOMEM,
	 MODULE_ERROR, "Can't allocate hashbin!\n");
  /* Init spinlock for instance list */
  spin_lock_init(&irnet_server.spinlock);

  /* Initialise control channel */
  init_waitqueue_head(&irnet_events.rwait);
  irnet_events.index = 0;
  /* Init spinlock for event logging */
  spin_lock_init(&irnet_events.spinlock);

#ifdef CONFIG_PROC_FS
  /* Add a /proc file for irnet infos */
  proc_create("irnet", 0, proc_irda, &irnet_proc_fops);
#endif /* CONFIG_PROC_FS */

  /* Setup the IrNET server */
  err = irnet_setup_server();

  if(!err)
    /* We are no longer functional... */
    irnet_server.running = 1;

  DEXIT(MODULE_TRACE, "\n");
  return err;
}

/*------------------------------------------------------------------*/
/*
 * Cleanup at exit...
 */
void __exit
irda_irnet_cleanup(void)
{
  DENTER(MODULE_TRACE, "()\n");

  /* We are no longer there... */
  irnet_server.running = 0;

#ifdef CONFIG_PROC_FS
  /* Remove our /proc file */
  remove_proc_entry("irnet", proc_irda);
#endif /* CONFIG_PROC_FS */

  /* Remove our IrNET server from existence */
  irnet_destroy_server();

  /* Remove all instances of IrNET socket still present */
  hashbin_delete(irnet_server.list, (FREE_FUNC) irda_irnet_destroy);

  DEXIT(MODULE_TRACE, "\n");
}