summaryrefslogtreecommitdiff
path: root/net/irda/irlmp.c
blob: 7a4a4d7fbe66bf7774d91e9e04c1a42c2bf5b495 (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
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
/*********************************************************************
 *
 * Filename:      irlmp.c
 * Version:       1.0
 * Description:   IrDA Link Management Protocol (LMP) layer
 * Status:        Stable.
 * Author:        Dag Brattli <dagb@cs.uit.no>
 * Created at:    Sun Aug 17 20:54:32 1997
 * Modified at:   Wed Jan  5 11:26:03 2000
 * Modified by:   Dag Brattli <dagb@cs.uit.no>
 *
 *     Copyright (c) 1998-2000 Dag Brattli <dagb@cs.uit.no>,
 *     All Rights Reserved.
 *     Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
 *
 *     This program is free software; you can redistribute it and/or
 *     modify it under the terms of the GNU General Public License as
 *     published by the Free Software Foundation; either version 2 of
 *     the License, or (at your option) any later version.
 *
 *     Neither Dag Brattli nor University of Troms� admit liability nor
 *     provide warranty for any of this software. This material is
 *     provided "AS-IS" and at no charge.
 *
 ********************************************************************/

#include <linux/config.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/skbuff.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/kmod.h>
#include <linux/random.h>
#include <linux/seq_file.h>

#include <net/irda/irda.h>
#include <net/irda/timer.h>
#include <net/irda/qos.h>
#include <net/irda/irlap.h>
#include <net/irda/iriap.h>
#include <net/irda/irlmp.h>
#include <net/irda/irlmp_frame.h>

static __u8 irlmp_find_free_slsap(void);
static int irlmp_slsap_inuse(__u8 slsap_sel);

/* Master structure */
struct irlmp_cb *irlmp = NULL;

/* These can be altered by the sysctl interface */
int  sysctl_discovery         = 0;
int  sysctl_discovery_timeout = 3; /* 3 seconds by default */
EXPORT_SYMBOL(sysctl_discovery_timeout);
int  sysctl_discovery_slots   = 6; /* 6 slots by default */
int  sysctl_lap_keepalive_time = LM_IDLE_TIMEOUT * 1000 / HZ;
char sysctl_devname[65];

const char *irlmp_reasons[] = {
	"ERROR, NOT USED",
	"LM_USER_REQUEST",
	"LM_LAP_DISCONNECT",
	"LM_CONNECT_FAILURE",
	"LM_LAP_RESET",
	"LM_INIT_DISCONNECT",
	"ERROR, NOT USED",
};
EXPORT_SYMBOL(irlmp_reasons);

/*
 * Function irlmp_init (void)
 *
 *    Create (allocate) the main IrLMP structure
 *
 */
int __init irlmp_init(void)
{
	IRDA_DEBUG(1, "%s()\n", __FUNCTION__);
	/* Initialize the irlmp structure. */
	irlmp = kmalloc( sizeof(struct irlmp_cb), GFP_KERNEL);
	if (irlmp == NULL)
		return -ENOMEM;
	memset(irlmp, 0, sizeof(struct irlmp_cb));

	irlmp->magic = LMP_MAGIC;

	irlmp->clients = hashbin_new(HB_LOCK);
	irlmp->services = hashbin_new(HB_LOCK);
	irlmp->links = hashbin_new(HB_LOCK);
	irlmp->unconnected_lsaps = hashbin_new(HB_LOCK);
	irlmp->cachelog = hashbin_new(HB_NOLOCK);

	if ((irlmp->clients == NULL) ||
	    (irlmp->services == NULL) ||
	    (irlmp->links == NULL) ||
	    (irlmp->unconnected_lsaps == NULL) ||
	    (irlmp->cachelog == NULL)) {
		return -ENOMEM;
	}

	spin_lock_init(&irlmp->cachelog->hb_spinlock);

	irlmp->last_lsap_sel = 0x0f; /* Reserved 0x00-0x0f */
	strcpy(sysctl_devname, "Linux");

	/* Do discovery every 3 seconds */
	init_timer(&irlmp->discovery_timer);
	irlmp_start_discovery_timer(irlmp, sysctl_discovery_timeout*HZ);

	return 0;
}

/*
 * Function irlmp_cleanup (void)
 *
 *    Remove IrLMP layer
 *
 */
void __exit irlmp_cleanup(void) 
{
	/* Check for main structure */
	IRDA_ASSERT(irlmp != NULL, return;);
	IRDA_ASSERT(irlmp->magic == LMP_MAGIC, return;);

	del_timer(&irlmp->discovery_timer);

	hashbin_delete(irlmp->links, (FREE_FUNC) kfree);
	hashbin_delete(irlmp->unconnected_lsaps, (FREE_FUNC) kfree);
	hashbin_delete(irlmp->clients, (FREE_FUNC) kfree);
	hashbin_delete(irlmp->services, (FREE_FUNC) kfree);
	hashbin_delete(irlmp->cachelog, (FREE_FUNC) kfree);

	/* De-allocate main structure */
	kfree(irlmp);
	irlmp = NULL;
}

/*
 * Function irlmp_open_lsap (slsap, notify)
 *
 *   Register with IrLMP and create a local LSAP,
 *   returns handle to LSAP.
 */
struct lsap_cb *irlmp_open_lsap(__u8 slsap_sel, notify_t *notify, __u8 pid)
{
	struct lsap_cb *self;

	IRDA_ASSERT(notify != NULL, return NULL;);
	IRDA_ASSERT(irlmp != NULL, return NULL;);
	IRDA_ASSERT(irlmp->magic == LMP_MAGIC, return NULL;);
	IRDA_ASSERT(notify->instance != NULL, return NULL;);

	/*  Does the client care which Source LSAP selector it gets?  */
	if (slsap_sel == LSAP_ANY) {
		slsap_sel = irlmp_find_free_slsap();
		if (!slsap_sel)
			return NULL;
	} else if (irlmp_slsap_inuse(slsap_sel))
		return NULL;

	/* Allocate new instance of a LSAP connection */
	self = kmalloc(sizeof(struct lsap_cb), GFP_ATOMIC);
	if (self == NULL) {
		IRDA_ERROR("%s: can't allocate memory\n", __FUNCTION__);
		return NULL;
	}
	memset(self, 0, sizeof(struct lsap_cb));

	self->magic = LMP_LSAP_MAGIC;
	self->slsap_sel = slsap_sel;

	/* Fix connectionless LSAP's */
	if (slsap_sel == LSAP_CONNLESS) {
#ifdef CONFIG_IRDA_ULTRA
		self->dlsap_sel = LSAP_CONNLESS;
		self->pid = pid;
#endif /* CONFIG_IRDA_ULTRA */
	} else
		self->dlsap_sel = LSAP_ANY;
	/* self->connected = FALSE; -> already NULL via memset() */

	init_timer(&self->watchdog_timer);

	self->notify = *notify;

	self->lsap_state = LSAP_DISCONNECTED;

	/* Insert into queue of unconnected LSAPs */
	hashbin_insert(irlmp->unconnected_lsaps, (irda_queue_t *) self,
		       (long) self, NULL);

	return self;
}
EXPORT_SYMBOL(irlmp_open_lsap);

/*
 * Function __irlmp_close_lsap (self)
 *
 *    Remove an instance of LSAP
 */
static void __irlmp_close_lsap(struct lsap_cb *self)
{
	IRDA_DEBUG(4, "%s()\n", __FUNCTION__);

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);

	/*
	 *  Set some of the variables to preset values
	 */
	self->magic = 0;
	del_timer(&self->watchdog_timer); /* Important! */

	if (self->conn_skb)
		dev_kfree_skb(self->conn_skb);

	kfree(self);
}

/*
 * Function irlmp_close_lsap (self)
 *
 *    Close and remove LSAP
 *
 */
void irlmp_close_lsap(struct lsap_cb *self)
{
	struct lap_cb *lap;
	struct lsap_cb *lsap = NULL;

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);

	/*
	 *  Find out if we should remove this LSAP from a link or from the
	 *  list of unconnected lsaps (not associated with a link)
	 */
	lap = self->lap;
	if (lap) {
		IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, return;);
		/* We might close a LSAP before it has completed the
		 * connection setup. In those case, higher layers won't
		 * send a proper disconnect request. Harmless, except
		 * that we will forget to close LAP... - Jean II */
		if(self->lsap_state != LSAP_DISCONNECTED) {
			self->lsap_state = LSAP_DISCONNECTED;
			irlmp_do_lap_event(self->lap,
					   LM_LAP_DISCONNECT_REQUEST, NULL);
		}
		/* Now, remove from the link */
		lsap = hashbin_remove(lap->lsaps, (long) self, NULL);
#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
		lap->cache.valid = FALSE;
#endif
	}
	self->lap = NULL;
	/* Check if we found the LSAP! If not then try the unconnected lsaps */
	if (!lsap) {
		lsap = hashbin_remove(irlmp->unconnected_lsaps, (long) self,
				      NULL);
	}
	if (!lsap) {
		IRDA_DEBUG(0,
		     "%s(), Looks like somebody has removed me already!\n",
			   __FUNCTION__);
		return;
	}
	__irlmp_close_lsap(self);
}
EXPORT_SYMBOL(irlmp_close_lsap);

/*
 * Function irlmp_register_irlap (saddr, notify)
 *
 *    Register IrLAP layer with IrLMP. There is possible to have multiple
 *    instances of the IrLAP layer, each connected to different IrDA ports
 *
 */
void irlmp_register_link(struct irlap_cb *irlap, __u32 saddr, notify_t *notify)
{
	struct lap_cb *lap;

	IRDA_ASSERT(irlmp != NULL, return;);
	IRDA_ASSERT(irlmp->magic == LMP_MAGIC, return;);
	IRDA_ASSERT(notify != NULL, return;);

	/*
	 *  Allocate new instance of a LSAP connection
	 */
	lap = kmalloc(sizeof(struct lap_cb), GFP_KERNEL);
	if (lap == NULL) {
		IRDA_ERROR("%s: unable to kmalloc\n", __FUNCTION__);
		return;
	}
	memset(lap, 0, sizeof(struct lap_cb));

	lap->irlap = irlap;
	lap->magic = LMP_LAP_MAGIC;
	lap->saddr = saddr;
	lap->daddr = DEV_ADDR_ANY;
#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
	lap->cache.valid = FALSE;
#endif
	lap->lsaps = hashbin_new(HB_LOCK);
	if (lap->lsaps == NULL) {
		IRDA_WARNING("%s(), unable to kmalloc lsaps\n", __FUNCTION__);
		kfree(lap);
		return;
	}

	lap->lap_state = LAP_STANDBY;

	init_timer(&lap->idle_timer);

	/*
	 *  Insert into queue of LMP links
	 */
	hashbin_insert(irlmp->links, (irda_queue_t *) lap, lap->saddr, NULL);

	/*
	 *  We set only this variable so IrLAP can tell us on which link the
	 *  different events happened on
	 */
	irda_notify_init(notify);
	notify->instance = lap;
}

/*
 * Function irlmp_unregister_irlap (saddr)
 *
 *    IrLAP layer has been removed!
 *
 */
void irlmp_unregister_link(__u32 saddr)
{
	struct lap_cb *link;

	IRDA_DEBUG(4, "%s()\n", __FUNCTION__);

	/* We must remove ourselves from the hashbin *first*. This ensure
	 * that no more LSAPs will be open on this link and no discovery
	 * will be triggered anymore. Jean II */
	link = hashbin_remove(irlmp->links, saddr, NULL);
	if (link) {
		IRDA_ASSERT(link->magic == LMP_LAP_MAGIC, return;);

		/* Kill all the LSAPs on this link. Jean II */
		link->reason = LAP_DISC_INDICATION;
		link->daddr = DEV_ADDR_ANY;
		irlmp_do_lap_event(link, LM_LAP_DISCONNECT_INDICATION, NULL);

		/* Remove all discoveries discovered at this link */
		irlmp_expire_discoveries(irlmp->cachelog, link->saddr, TRUE);

		/* Final cleanup */
		del_timer(&link->idle_timer);
		link->magic = 0;
		kfree(link);
	}
}

/*
 * Function irlmp_connect_request (handle, dlsap, userdata)
 *
 *    Connect with a peer LSAP
 *
 */
int irlmp_connect_request(struct lsap_cb *self, __u8 dlsap_sel,
			  __u32 saddr, __u32 daddr,
			  struct qos_info *qos, struct sk_buff *userdata)
{
	struct sk_buff *tx_skb = userdata;
	struct lap_cb *lap;
	struct lsap_cb *lsap;
	int ret;

	IRDA_ASSERT(self != NULL, return -EBADR;);
	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -EBADR;);

	IRDA_DEBUG(2,
	      "%s(), slsap_sel=%02x, dlsap_sel=%02x, saddr=%08x, daddr=%08x\n",
	      __FUNCTION__, self->slsap_sel, dlsap_sel, saddr, daddr);

	if (test_bit(0, &self->connected)) {
		ret = -EISCONN;
		goto err;
	}

	/* Client must supply destination device address */
	if (!daddr) {
		ret = -EINVAL;
		goto err;
	}

	/* Any userdata? */
	if (tx_skb == NULL) {
		tx_skb = dev_alloc_skb(64);
		if (!tx_skb)
			return -ENOMEM;

		skb_reserve(tx_skb, LMP_MAX_HEADER);
	}

	/* Make room for MUX control header (3 bytes) */
	IRDA_ASSERT(skb_headroom(tx_skb) >= LMP_CONTROL_HEADER, return -1;);
	skb_push(tx_skb, LMP_CONTROL_HEADER);

	self->dlsap_sel = dlsap_sel;

	/*
	 * Find the link to where we should try to connect since there may
	 * be more than one IrDA port on this machine. If the client has
	 * passed us the saddr (and already knows which link to use), then
	 * we use that to find the link, if not then we have to look in the
	 * discovery log and check if any of the links has discovered a
	 * device with the given daddr
	 */
	if ((!saddr) || (saddr == DEV_ADDR_ANY)) {
		discovery_t *discovery;
		unsigned long flags;

		spin_lock_irqsave(&irlmp->cachelog->hb_spinlock, flags);
		if (daddr != DEV_ADDR_ANY)
			discovery = hashbin_find(irlmp->cachelog, daddr, NULL);
		else {
			IRDA_DEBUG(2, "%s(), no daddr\n", __FUNCTION__);
			discovery = (discovery_t *)
				hashbin_get_first(irlmp->cachelog);
		}

		if (discovery) {
			saddr = discovery->data.saddr;
			daddr = discovery->data.daddr;
		}
		spin_unlock_irqrestore(&irlmp->cachelog->hb_spinlock, flags);
	}
	lap = hashbin_lock_find(irlmp->links, saddr, NULL);
	if (lap == NULL) {
		IRDA_DEBUG(1, "%s(), Unable to find a usable link!\n", __FUNCTION__);
		ret = -EHOSTUNREACH;
		goto err;
	}

	/* Check if LAP is disconnected or already connected */
	if (lap->daddr == DEV_ADDR_ANY)
		lap->daddr = daddr;
	else if (lap->daddr != daddr) {
		/* Check if some LSAPs are active on this LAP */
		if (HASHBIN_GET_SIZE(lap->lsaps) == 0) {
			/* No active connection, but LAP hasn't been
			 * disconnected yet (waiting for timeout in LAP).
			 * Maybe we could give LAP a bit of help in this case.
			 */
			IRDA_DEBUG(0, "%s(), sorry, but I'm waiting for LAP to timeout!\n", __FUNCTION__);
			ret = -EAGAIN;
			goto err;
		}

		/* LAP is already connected to a different node, and LAP
		 * can only talk to one node at a time */
		IRDA_DEBUG(0, "%s(), sorry, but link is busy!\n", __FUNCTION__);
		ret = -EBUSY;
		goto err;
	}

	self->lap = lap;

	/*
	 *  Remove LSAP from list of unconnected LSAPs and insert it into the
	 *  list of connected LSAPs for the particular link
	 */
	lsap = hashbin_remove(irlmp->unconnected_lsaps, (long) self, NULL);

	IRDA_ASSERT(lsap != NULL, return -1;);
	IRDA_ASSERT(lsap->magic == LMP_LSAP_MAGIC, return -1;);
	IRDA_ASSERT(lsap->lap != NULL, return -1;);
	IRDA_ASSERT(lsap->lap->magic == LMP_LAP_MAGIC, return -1;);

	hashbin_insert(self->lap->lsaps, (irda_queue_t *) self, (long) self,
		       NULL);

	set_bit(0, &self->connected);	/* TRUE */

	/*
	 *  User supplied qos specifications?
	 */
	if (qos)
		self->qos = *qos;

	irlmp_do_lsap_event(self, LM_CONNECT_REQUEST, tx_skb);

	/* Drop reference count - see irlap_data_request(). */
	dev_kfree_skb(tx_skb);

	return 0;

err:
	/* Cleanup */
	if(tx_skb)
		dev_kfree_skb(tx_skb);
	return ret;
}
EXPORT_SYMBOL(irlmp_connect_request);

/*
 * Function irlmp_connect_indication (self)
 *
 *    Incoming connection
 *
 */
void irlmp_connect_indication(struct lsap_cb *self, struct sk_buff *skb)
{
	int max_seg_size;
	int lap_header_size;
	int max_header_size;

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
	IRDA_ASSERT(skb != NULL, return;);
	IRDA_ASSERT(self->lap != NULL, return;);

	IRDA_DEBUG(2, "%s(), slsap_sel=%02x, dlsap_sel=%02x\n",
		   __FUNCTION__, self->slsap_sel, self->dlsap_sel);

	/* Note : self->lap is set in irlmp_link_data_indication(),
	 * (case CONNECT_CMD:) because we have no way to set it here.
	 * Similarly, self->dlsap_sel is usually set in irlmp_find_lsap().
	 * Jean II */

	self->qos = *self->lap->qos;

	max_seg_size = self->lap->qos->data_size.value-LMP_HEADER;
	lap_header_size = IRLAP_GET_HEADER_SIZE(self->lap->irlap);
	max_header_size = LMP_HEADER + lap_header_size;

	/* Hide LMP_CONTROL_HEADER header from layer above */
	skb_pull(skb, LMP_CONTROL_HEADER);

	if (self->notify.connect_indication) {
		/* Don't forget to refcount it - see irlap_driver_rcv(). */
		skb_get(skb);
		self->notify.connect_indication(self->notify.instance, self,
						&self->qos, max_seg_size,
						max_header_size, skb);
	}
}

/*
 * Function irlmp_connect_response (handle, userdata)
 *
 *    Service user is accepting connection
 *
 */
int irlmp_connect_response(struct lsap_cb *self, struct sk_buff *userdata)
{
	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
	IRDA_ASSERT(userdata != NULL, return -1;);

	/* We set the connected bit and move the lsap to the connected list
	 * in the state machine itself. Jean II */

	IRDA_DEBUG(2, "%s(), slsap_sel=%02x, dlsap_sel=%02x\n",
		   __FUNCTION__, self->slsap_sel, self->dlsap_sel);

	/* Make room for MUX control header (3 bytes) */
	IRDA_ASSERT(skb_headroom(userdata) >= LMP_CONTROL_HEADER, return -1;);
	skb_push(userdata, LMP_CONTROL_HEADER);

	irlmp_do_lsap_event(self, LM_CONNECT_RESPONSE, userdata);

	/* Drop reference count - see irlap_data_request(). */
	dev_kfree_skb(userdata);

	return 0;
}
EXPORT_SYMBOL(irlmp_connect_response);

/*
 * Function irlmp_connect_confirm (handle, skb)
 *
 *    LSAP connection confirmed peer device!
 */
void irlmp_connect_confirm(struct lsap_cb *self, struct sk_buff *skb)
{
	int max_header_size;
	int lap_header_size;
	int max_seg_size;

	IRDA_DEBUG(3, "%s()\n", __FUNCTION__);

	IRDA_ASSERT(skb != NULL, return;);
	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
	IRDA_ASSERT(self->lap != NULL, return;);

	self->qos = *self->lap->qos;

	max_seg_size    = self->lap->qos->data_size.value-LMP_HEADER;
	lap_header_size = IRLAP_GET_HEADER_SIZE(self->lap->irlap);
	max_header_size = LMP_HEADER + lap_header_size;

	IRDA_DEBUG(2, "%s(), max_header_size=%d\n",
		   __FUNCTION__, max_header_size);

	/* Hide LMP_CONTROL_HEADER header from layer above */
	skb_pull(skb, LMP_CONTROL_HEADER);

	if (self->notify.connect_confirm) {
		/* Don't forget to refcount it - see irlap_driver_rcv() */
		skb_get(skb);
		self->notify.connect_confirm(self->notify.instance, self,
					     &self->qos, max_seg_size,
					     max_header_size, skb);
	}
}

/*
 * Function irlmp_dup (orig, instance)
 *
 *    Duplicate LSAP, can be used by servers to confirm a connection on a
 *    new LSAP so it can keep listening on the old one.
 *
 */
struct lsap_cb *irlmp_dup(struct lsap_cb *orig, void *instance)
{
	struct lsap_cb *new;
	unsigned long flags;

	IRDA_DEBUG(1, "%s()\n", __FUNCTION__);

	spin_lock_irqsave(&irlmp->unconnected_lsaps->hb_spinlock, flags);

	/* Only allowed to duplicate unconnected LSAP's, and only LSAPs
	 * that have received a connect indication. Jean II */
	if ((!hashbin_find(irlmp->unconnected_lsaps, (long) orig, NULL)) ||
	    (orig->lap == NULL)) {
		IRDA_DEBUG(0, "%s(), invalid LSAP (wrong state)\n",
			   __FUNCTION__);
		spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock,
				       flags);
		return NULL;
	}

	/* Allocate a new instance */
	new = kmalloc(sizeof(struct lsap_cb), GFP_ATOMIC);
	if (!new)  {
		IRDA_DEBUG(0, "%s(), unable to kmalloc\n", __FUNCTION__);
		spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock,
				       flags);
		return NULL;
	}
	/* Dup */
	memcpy(new, orig, sizeof(struct lsap_cb));
	/* new->lap = orig->lap; => done in the memcpy() */
	/* new->slsap_sel = orig->slsap_sel; => done in the memcpy() */
	new->conn_skb = NULL;

	spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock, flags);

	/* Not everything is the same */
	new->notify.instance = instance;

	init_timer(&new->watchdog_timer);

	hashbin_insert(irlmp->unconnected_lsaps, (irda_queue_t *) new,
		       (long) new, NULL);

#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
	/* Make sure that we invalidate the LSAP cache */
	new->lap->cache.valid = FALSE;
#endif /* CONFIG_IRDA_CACHE_LAST_LSAP */

	return new;
}
EXPORT_SYMBOL(irlmp_dup);

/*
 * Function irlmp_disconnect_request (handle, userdata)
 *
 *    The service user is requesting disconnection, this will not remove the
 *    LSAP, but only mark it as disconnected
 */
int irlmp_disconnect_request(struct lsap_cb *self, struct sk_buff *userdata)
{
	struct lsap_cb *lsap;

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
	IRDA_ASSERT(userdata != NULL, return -1;);

	/* Already disconnected ?
	 * There is a race condition between irlmp_disconnect_indication()
	 * and us that might mess up the hashbins below. This fixes it.
	 * Jean II */
	if (! test_and_clear_bit(0, &self->connected)) {
		IRDA_DEBUG(0, "%s(), already disconnected!\n", __FUNCTION__);
		dev_kfree_skb(userdata);
		return -1;
	}

	skb_push(userdata, LMP_CONTROL_HEADER);

	/*
	 *  Do the event before the other stuff since we must know
	 *  which lap layer that the frame should be transmitted on
	 */
	irlmp_do_lsap_event(self, LM_DISCONNECT_REQUEST, userdata);

	/* Drop reference count - see irlap_data_request(). */
	dev_kfree_skb(userdata);

	/*
	 *  Remove LSAP from list of connected LSAPs for the particular link
	 *  and insert it into the list of unconnected LSAPs
	 */
	IRDA_ASSERT(self->lap != NULL, return -1;);
	IRDA_ASSERT(self->lap->magic == LMP_LAP_MAGIC, return -1;);
	IRDA_ASSERT(self->lap->lsaps != NULL, return -1;);

	lsap = hashbin_remove(self->lap->lsaps, (long) self, NULL);
#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
	self->lap->cache.valid = FALSE;
#endif

	IRDA_ASSERT(lsap != NULL, return -1;);
	IRDA_ASSERT(lsap->magic == LMP_LSAP_MAGIC, return -1;);
	IRDA_ASSERT(lsap == self, return -1;);

	hashbin_insert(irlmp->unconnected_lsaps, (irda_queue_t *) self,
		       (long) self, NULL);

	/* Reset some values */
	self->dlsap_sel = LSAP_ANY;
	self->lap = NULL;

	return 0;
}
EXPORT_SYMBOL(irlmp_disconnect_request);

/*
 * Function irlmp_disconnect_indication (reason, userdata)
 *
 *    LSAP is being closed!
 */
void irlmp_disconnect_indication(struct lsap_cb *self, LM_REASON reason,
				 struct sk_buff *skb)
{
	struct lsap_cb *lsap;

	IRDA_DEBUG(1, "%s(), reason=%s\n", __FUNCTION__, irlmp_reasons[reason]);
	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);

	IRDA_DEBUG(3, "%s(), slsap_sel=%02x, dlsap_sel=%02x\n",
		   __FUNCTION__, self->slsap_sel, self->dlsap_sel);

	/* Already disconnected ?
	 * There is a race condition between irlmp_disconnect_request()
	 * and us that might mess up the hashbins below. This fixes it.
	 * Jean II */
	if (! test_and_clear_bit(0, &self->connected)) {
		IRDA_DEBUG(0, "%s(), already disconnected!\n", __FUNCTION__);
		return;
	}

	/*
	 *  Remove association between this LSAP and the link it used
	 */
	IRDA_ASSERT(self->lap != NULL, return;);
	IRDA_ASSERT(self->lap->lsaps != NULL, return;);

	lsap = hashbin_remove(self->lap->lsaps, (long) self, NULL);
#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
	self->lap->cache.valid = FALSE;
#endif

	IRDA_ASSERT(lsap != NULL, return;);
	IRDA_ASSERT(lsap == self, return;);
	hashbin_insert(irlmp->unconnected_lsaps, (irda_queue_t *) lsap,
		       (long) lsap, NULL);

	self->dlsap_sel = LSAP_ANY;
	self->lap = NULL;

	/*
	 *  Inform service user
	 */
	if (self->notify.disconnect_indication) {
		/* Don't forget to refcount it - see irlap_driver_rcv(). */
		if(skb)
			skb_get(skb);
		self->notify.disconnect_indication(self->notify.instance,
						   self, reason, skb);
	} else {
		IRDA_DEBUG(0, "%s(), no handler\n", __FUNCTION__);
	}
}

/*
 * Function irlmp_do_expiry (void)
 *
 *    Do a cleanup of the discovery log (remove old entries)
 *
 * Note : separate from irlmp_do_discovery() so that we can handle
 * passive discovery properly.
 */
void irlmp_do_expiry(void)
{
	struct lap_cb *lap;

	/*
	 * Expire discovery on all links which are *not* connected.
	 * On links which are connected, we can't do discovery
	 * anymore and can't refresh the log, so we freeze the
	 * discovery log to keep info about the device we are
	 * connected to.
	 * This info is mandatory if we want irlmp_connect_request()
	 * to work properly. - Jean II
	 */
	lap = (struct lap_cb *) hashbin_get_first(irlmp->links);
	while (lap != NULL) {
		IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, return;);

		if (lap->lap_state == LAP_STANDBY) {
			/* Expire discoveries discovered on this link */
			irlmp_expire_discoveries(irlmp->cachelog, lap->saddr,
						 FALSE);
		}
		lap = (struct lap_cb *) hashbin_get_next(irlmp->links);
	}
}

/*
 * Function irlmp_do_discovery (nslots)
 *
 *    Do some discovery on all links
 *
 * Note : log expiry is done above.
 */
void irlmp_do_discovery(int nslots)
{
	struct lap_cb *lap;

	/* Make sure the value is sane */
	if ((nslots != 1) && (nslots != 6) && (nslots != 8) && (nslots != 16)){
		IRDA_WARNING("%s: invalid value for number of slots!\n",
			     __FUNCTION__);
		nslots = sysctl_discovery_slots = 8;
	}

	/* Construct new discovery info to be used by IrLAP, */
	u16ho(irlmp->discovery_cmd.data.hints) = irlmp->hints.word;

	/*
	 *  Set character set for device name (we use ASCII), and
	 *  copy device name. Remember to make room for a \0 at the
	 *  end
	 */
	irlmp->discovery_cmd.data.charset = CS_ASCII;
	strncpy(irlmp->discovery_cmd.data.info, sysctl_devname,
		NICKNAME_MAX_LEN);
	irlmp->discovery_cmd.name_len = strlen(irlmp->discovery_cmd.data.info);
	irlmp->discovery_cmd.nslots = nslots;

	/*
	 * Try to send discovery packets on all links
	 */
	lap = (struct lap_cb *) hashbin_get_first(irlmp->links);
	while (lap != NULL) {
		IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, return;);

		if (lap->lap_state == LAP_STANDBY) {
			/* Try to discover */
			irlmp_do_lap_event(lap, LM_LAP_DISCOVERY_REQUEST,
					   NULL);
		}
		lap = (struct lap_cb *) hashbin_get_next(irlmp->links);
	}
}

/*
 * Function irlmp_discovery_request (nslots)
 *
 *    Do a discovery of devices in front of the computer
 *
 * If the caller has registered a client discovery callback, this
 * allow him to receive the full content of the discovery log through
 * this callback (as normally he will receive only new discoveries).
 */
void irlmp_discovery_request(int nslots)
{
	/* Return current cached discovery log (in full) */
	irlmp_discovery_confirm(irlmp->cachelog, DISCOVERY_LOG);

	/*
	 * Start a single discovery operation if discovery is not already
         * running
	 */
	if (!sysctl_discovery) {
		/* Check if user wants to override the default */
		if (nslots == DISCOVERY_DEFAULT_SLOTS)
			nslots = sysctl_discovery_slots;

		irlmp_do_discovery(nslots);
		/* Note : we never do expiry here. Expiry will run on the
		 * discovery timer regardless of the state of sysctl_discovery
		 * Jean II */
	}
}
EXPORT_SYMBOL(irlmp_discovery_request);

/*
 * Function irlmp_get_discoveries (pn, mask, slots)
 *
 *    Return the current discovery log
 *
 * If discovery is not enabled, you should call this function again
 * after 1 or 2 seconds (i.e. after discovery has been done).
 */
struct irda_device_info *irlmp_get_discoveries(int *pn, __u16 mask, int nslots)
{
	/* If discovery is not enabled, it's likely that the discovery log
	 * will be empty. So, we trigger a single discovery, so that next
	 * time the user call us there might be some results in the log.
	 * Jean II
	 */
	if (!sysctl_discovery) {
		/* Check if user wants to override the default */
		if (nslots == DISCOVERY_DEFAULT_SLOTS)
			nslots = sysctl_discovery_slots;

		/* Start discovery - will complete sometime later */
		irlmp_do_discovery(nslots);
		/* Note : we never do expiry here. Expiry will run on the
		 * discovery timer regardless of the state of sysctl_discovery
		 * Jean II */
	}

	/* Return current cached discovery log */
	return(irlmp_copy_discoveries(irlmp->cachelog, pn, mask, TRUE));
}
EXPORT_SYMBOL(irlmp_get_discoveries);

/*
 * Function irlmp_notify_client (log)
 *
 *    Notify all about discovered devices
 *
 * Clients registered with IrLMP are :
 *	o IrComm
 *	o IrLAN
 *	o Any socket (in any state - ouch, that may be a lot !)
 * The client may have defined a callback to be notified in case of
 * partial/selective discovery based on the hints that it passed to IrLMP.
 */
static inline void
irlmp_notify_client(irlmp_client_t *client,
		    hashbin_t *log, DISCOVERY_MODE mode)
{
	discinfo_t *discoveries;	/* Copy of the discovery log */
	int	number;			/* Number of nodes in the log */
	int	i;

	IRDA_DEBUG(3, "%s()\n", __FUNCTION__);

	/* Check if client wants or not partial/selective log (optimisation) */
	if (!client->disco_callback)
		return;

	/*
	 * Locking notes :
	 * the old code was manipulating the log directly, which was
	 * very racy. Now, we use copy_discoveries, that protects
	 * itself while dumping the log for us.
	 * The overhead of the copy is compensated by the fact that
	 * we only pass new discoveries in normal mode and don't
	 * pass the same old entry every 3s to the caller as we used
	 * to do (virtual function calling is expensive).
	 * Jean II
	 */

	/*
	 * Now, check all discovered devices (if any), and notify client
	 * only about the services that the client is interested in
	 * We also notify only about the new devices unless the caller
	 * explicitly request a dump of the log. Jean II
	 */
	discoveries = irlmp_copy_discoveries(log, &number,
					     client->hint_mask.word,
					     (mode == DISCOVERY_LOG));
	/* Check if the we got some results */
	if (discoveries == NULL)
		return;	/* No nodes discovered */

	/* Pass all entries to the listener */
	for(i = 0; i < number; i++)
		client->disco_callback(&(discoveries[i]), mode, client->priv);

	/* Free up our buffer */
	kfree(discoveries);
}

/*
 * Function irlmp_discovery_confirm ( self, log)
 *
 *    Some device(s) answered to our discovery request! Check to see which
 *    device it is, and give indication to the client(s)
 *
 */
void irlmp_discovery_confirm(hashbin_t *log, DISCOVERY_MODE mode)
{
	irlmp_client_t *client;
	irlmp_client_t *client_next;

	IRDA_DEBUG(3, "%s()\n", __FUNCTION__);

	IRDA_ASSERT(log != NULL, return;);

	if (!(HASHBIN_GET_SIZE(log)))
		return;

	/* For each client - notify callback may touch client list */
	client = (irlmp_client_t *) hashbin_get_first(irlmp->clients);
	while (NULL != hashbin_find_next(irlmp->clients, (long) client, NULL,
					 (void *) &client_next) ) {
		/* Check if we should notify client */
		irlmp_notify_client(client, log, mode);

		client = client_next;
	}
}

/*
 * Function irlmp_discovery_expiry (expiry)
 *
 *	This device is no longer been discovered, and therefore it is being
 *	purged from the discovery log. Inform all clients who have
 *	registered for this event...
 *
 *	Note : called exclusively from discovery.c
 *	Note : this is no longer called under discovery spinlock, so the
 *		client can do whatever he wants in the callback.
 */
void irlmp_discovery_expiry(discinfo_t *expiries, int number)
{
	irlmp_client_t *client;
	irlmp_client_t *client_next;
	int		i;

	IRDA_DEBUG(3, "%s()\n", __FUNCTION__);

	IRDA_ASSERT(expiries != NULL, return;);

	/* For each client - notify callback may touch client list */
	client = (irlmp_client_t *) hashbin_get_first(irlmp->clients);
	while (NULL != hashbin_find_next(irlmp->clients, (long) client, NULL,
					 (void *) &client_next) ) {

		/* Pass all entries to the listener */
		for(i = 0; i < number; i++) {
			/* Check if we should notify client */
			if ((client->expir_callback) &&
			    (client->hint_mask.word & u16ho(expiries[i].hints)
			     & 0x7f7f) )
				client->expir_callback(&(expiries[i]),
						       EXPIRY_TIMEOUT,
						       client->priv);
		}

		/* Next client */
		client = client_next;
	}
}

/*
 * Function irlmp_get_discovery_response ()
 *
 *    Used by IrLAP to get the discovery info it needs when answering
 *    discovery requests by other devices.
 */
discovery_t *irlmp_get_discovery_response(void)
{
	IRDA_DEBUG(4, "%s()\n", __FUNCTION__);

	IRDA_ASSERT(irlmp != NULL, return NULL;);

	u16ho(irlmp->discovery_rsp.data.hints) = irlmp->hints.word;

	/*
	 *  Set character set for device name (we use ASCII), and
	 *  copy device name. Remember to make room for a \0 at the
	 *  end
	 */
	irlmp->discovery_rsp.data.charset = CS_ASCII;

	strncpy(irlmp->discovery_rsp.data.info, sysctl_devname,
		NICKNAME_MAX_LEN);
	irlmp->discovery_rsp.name_len = strlen(irlmp->discovery_rsp.data.info);

	return &irlmp->discovery_rsp;
}

/*
 * Function irlmp_data_request (self, skb)
 *
 *    Send some data to peer device
 *
 * Note on skb management :
 * After calling the lower layers of the IrDA stack, we always
 * kfree() the skb, which drop the reference count (and potentially
 * destroy it).
 * IrLMP and IrLAP may queue the packet, and in those cases will need
 * to use skb_get() to keep it around.
 * Jean II
 */
int irlmp_data_request(struct lsap_cb *self, struct sk_buff *userdata)
{
	int	ret;

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);

	/* Make room for MUX header */
	IRDA_ASSERT(skb_headroom(userdata) >= LMP_HEADER, return -1;);
	skb_push(userdata, LMP_HEADER);

	ret = irlmp_do_lsap_event(self, LM_DATA_REQUEST, userdata);

	/* Drop reference count - see irlap_data_request(). */
	dev_kfree_skb(userdata);

	return ret;
}
EXPORT_SYMBOL(irlmp_data_request);

/*
 * Function irlmp_data_indication (handle, skb)
 *
 *    Got data from LAP layer so pass it up to upper layer
 *
 */
void irlmp_data_indication(struct lsap_cb *self, struct sk_buff *skb)
{
	/* Hide LMP header from layer above */
	skb_pull(skb, LMP_HEADER);

	if (self->notify.data_indication) {
		/* Don't forget to refcount it - see irlap_driver_rcv(). */
		skb_get(skb);
		self->notify.data_indication(self->notify.instance, self, skb);
	}
}

/*
 * Function irlmp_udata_request (self, skb)
 */
int irlmp_udata_request(struct lsap_cb *self, struct sk_buff *userdata)
{
	int	ret;

	IRDA_DEBUG(4, "%s()\n", __FUNCTION__);

	IRDA_ASSERT(userdata != NULL, return -1;);

	/* Make room for MUX header */
	IRDA_ASSERT(skb_headroom(userdata) >= LMP_HEADER, return -1;);
	skb_push(userdata, LMP_HEADER);

	ret = irlmp_do_lsap_event(self, LM_UDATA_REQUEST, userdata);

	/* Drop reference count - see irlap_data_request(). */
	dev_kfree_skb(userdata);

	return ret;
}

/*
 * Function irlmp_udata_indication (self, skb)
 *
 *    Send unreliable data (but still within the connection)
 *
 */
void irlmp_udata_indication(struct lsap_cb *self, struct sk_buff *skb)
{
	IRDA_DEBUG(4, "%s()\n", __FUNCTION__);

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
	IRDA_ASSERT(skb != NULL, return;);

	/* Hide LMP header from layer above */
	skb_pull(skb, LMP_HEADER);

	if (self->notify.udata_indication) {
		/* Don't forget to refcount it - see irlap_driver_rcv(). */
		skb_get(skb);
		self->notify.udata_indication(self->notify.instance, self,
					      skb);
	}
}

/*
 * Function irlmp_connless_data_request (self, skb)
 */
#ifdef CONFIG_IRDA_ULTRA
int irlmp_connless_data_request(struct lsap_cb *self, struct sk_buff *userdata,
				__u8 pid)
{
	struct sk_buff *clone_skb;
	struct lap_cb *lap;

	IRDA_DEBUG(4, "%s()\n", __FUNCTION__);

	IRDA_ASSERT(userdata != NULL, return -1;);

	/* Make room for MUX and PID header */
	IRDA_ASSERT(skb_headroom(userdata) >= LMP_HEADER+LMP_PID_HEADER,
		    return -1;);

	/* Insert protocol identifier */
	skb_push(userdata, LMP_PID_HEADER);
	if(self != NULL)
	  userdata->data[0] = self->pid;
	else
	  userdata->data[0] = pid;

	/* Connectionless sockets must use 0x70 */
	skb_push(userdata, LMP_HEADER);
	userdata->data[0] = userdata->data[1] = LSAP_CONNLESS;

	/* Try to send Connectionless  packets out on all links */
	lap = (struct lap_cb *) hashbin_get_first(irlmp->links);
	while (lap != NULL) {
		IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, return -1;);

		clone_skb = skb_clone(userdata, GFP_ATOMIC);
		if (!clone_skb) {
			dev_kfree_skb(userdata);
			return -ENOMEM;
		}

		irlap_unitdata_request(lap->irlap, clone_skb);
		/* irlap_unitdata_request() don't increase refcount,
		 * so no dev_kfree_skb() - Jean II */

		lap = (struct lap_cb *) hashbin_get_next(irlmp->links);
	}
	dev_kfree_skb(userdata);

	return 0;
}
#endif /* CONFIG_IRDA_ULTRA */

/*
 * Function irlmp_connless_data_indication (self, skb)
 *
 *    Receive unreliable data outside any connection. Mostly used by Ultra
 *
 */
#ifdef CONFIG_IRDA_ULTRA
void irlmp_connless_data_indication(struct lsap_cb *self, struct sk_buff *skb)
{
	IRDA_DEBUG(4, "%s()\n", __FUNCTION__);

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
	IRDA_ASSERT(skb != NULL, return;);

	/* Hide LMP and PID header from layer above */
	skb_pull(skb, LMP_HEADER+LMP_PID_HEADER);

	if (self->notify.udata_indication) {
		/* Don't forget to refcount it - see irlap_driver_rcv(). */
		skb_get(skb);
		self->notify.udata_indication(self->notify.instance, self,
					      skb);
	}
}
#endif /* CONFIG_IRDA_ULTRA */

/*
 * Propagate status indication from LAP to LSAPs (via LMP)
 * This don't trigger any change of state in lap_cb, lmp_cb or lsap_cb,
 * and the event is stateless, therefore we can bypass both state machines
 * and send the event direct to the LSAP user.
 * Jean II
 */
void irlmp_status_indication(struct lap_cb *self,
			     LINK_STATUS link, LOCK_STATUS lock)
{
	struct lsap_cb *next;
	struct lsap_cb *curr;

	/* Send status_indication to all LSAPs using this link */
	curr = (struct lsap_cb *) hashbin_get_first( self->lsaps);
	while (NULL != hashbin_find_next(self->lsaps, (long) curr, NULL,
					 (void *) &next) ) {
		IRDA_ASSERT(curr->magic == LMP_LSAP_MAGIC, return;);
		/*
		 *  Inform service user if he has requested it
		 */
		if (curr->notify.status_indication != NULL)
			curr->notify.status_indication(curr->notify.instance,
						       link, lock);
		else
			IRDA_DEBUG(2, "%s(), no handler\n", __FUNCTION__);

		curr = next;
	}
}

/*
 * Receive flow control indication from LAP.
 * LAP want us to send it one more frame. We implement a simple round
 * robin scheduler between the active sockets so that we get a bit of
 * fairness. Note that the round robin is far from perfect, but it's
 * better than nothing.
 * We then poll the selected socket so that we can do synchronous
 * refilling of IrLAP (which allow to minimise the number of buffers).
 * Jean II
 */
void irlmp_flow_indication(struct lap_cb *self, LOCAL_FLOW flow)
{
	struct lsap_cb *next;
	struct lsap_cb *curr;
	int	lsap_todo;

	IRDA_ASSERT(self->magic == LMP_LAP_MAGIC, return;);
	IRDA_ASSERT(flow == FLOW_START, return;);

	/* Get the number of lsap. That's the only safe way to know
	 * that we have looped around... - Jean II */
	lsap_todo = HASHBIN_GET_SIZE(self->lsaps);
	IRDA_DEBUG(4, "%s() : %d lsaps to scan\n", __FUNCTION__, lsap_todo);

	/* Poll lsap in order until the queue is full or until we
	 * tried them all.
	 * Most often, the current LSAP will have something to send,
	 * so we will go through this loop only once. - Jean II */
	while((lsap_todo--) &&
	      (IRLAP_GET_TX_QUEUE_LEN(self->irlap) < LAP_HIGH_THRESHOLD)) {
		/* Try to find the next lsap we should poll. */
		next = self->flow_next;
		/* If we have no lsap, restart from first one */
		if(next == NULL)
			next = (struct lsap_cb *) hashbin_get_first(self->lsaps);
		/* Verify current one and find the next one */
		curr = hashbin_find_next(self->lsaps, (long) next, NULL,
					 (void *) &self->flow_next);
		/* Uh-oh... Paranoia */
		if(curr == NULL)
			break;
		IRDA_DEBUG(4, "%s() : curr is %p, next was %p and is now %p, still %d to go - queue len = %d\n", __FUNCTION__, curr, next, self->flow_next, lsap_todo, IRLAP_GET_TX_QUEUE_LEN(self->irlap));

		/* Inform lsap user that it can send one more packet. */
		if (curr->notify.flow_indication != NULL)
			curr->notify.flow_indication(curr->notify.instance,
						     curr, flow);
		else
			IRDA_DEBUG(1, "%s(), no handler\n", __FUNCTION__);
	}
}

#if 0
/*
 * Function irlmp_hint_to_service (hint)
 *
 *    Returns a list of all servics contained in the given hint bits. This
 *    function assumes that the hint bits have the size of two bytes only
 */
__u8 *irlmp_hint_to_service(__u8 *hint)
{
	__u8 *service;
	int i = 0;

	/*
	 * Allocate array to store services in. 16 entries should be safe
	 * since we currently only support 2 hint bytes
	 */
	service = kmalloc(16, GFP_ATOMIC);
	if (!service) {
		IRDA_DEBUG(1, "%s(), Unable to kmalloc!\n", __FUNCTION__);
		return NULL;
	}

	if (!hint[0]) {
		IRDA_DEBUG(1, "<None>\n");
		kfree(service);
		return NULL;
	}
	if (hint[0] & HINT_PNP)
		IRDA_DEBUG(1, "PnP Compatible ");
	if (hint[0] & HINT_PDA)
		IRDA_DEBUG(1, "PDA/Palmtop ");
	if (hint[0] & HINT_COMPUTER)
		IRDA_DEBUG(1, "Computer ");
	if (hint[0] & HINT_PRINTER) {
		IRDA_DEBUG(1, "Printer ");
		service[i++] = S_PRINTER;
	}
	if (hint[0] & HINT_MODEM)
		IRDA_DEBUG(1, "Modem ");
	if (hint[0] & HINT_FAX)
		IRDA_DEBUG(1, "Fax ");
	if (hint[0] & HINT_LAN) {
		IRDA_DEBUG(1, "LAN Access ");
		service[i++] = S_LAN;
	}
	/*
	 *  Test if extension byte exists. This byte will usually be
	 *  there, but this is not really required by the standard.
	 *  (IrLMP p. 29)
	 */
	if (hint[0] & HINT_EXTENSION) {
		if (hint[1] & HINT_TELEPHONY) {
			IRDA_DEBUG(1, "Telephony ");
			service[i++] = S_TELEPHONY;
		} if (hint[1] & HINT_FILE_SERVER)
			IRDA_DEBUG(1, "File Server ");

		if (hint[1] & HINT_COMM) {
			IRDA_DEBUG(1, "IrCOMM ");
			service[i++] = S_COMM;
		}
		if (hint[1] & HINT_OBEX) {
			IRDA_DEBUG(1, "IrOBEX ");
			service[i++] = S_OBEX;
		}
	}
	IRDA_DEBUG(1, "\n");

	/* So that client can be notified about any discovery */
	service[i++] = S_ANY;

	service[i] = S_END;

	return service;
}
#endif

static const __u16 service_hint_mapping[S_END][2] = {
	{ HINT_PNP,		0 },			/* S_PNP */
	{ HINT_PDA,		0 },			/* S_PDA */
	{ HINT_COMPUTER,	0 },			/* S_COMPUTER */
	{ HINT_PRINTER,		0 },			/* S_PRINTER */
	{ HINT_MODEM,		0 },			/* S_MODEM */
	{ HINT_FAX,		0 },			/* S_FAX */
	{ HINT_LAN,		0 },			/* S_LAN */
	{ HINT_EXTENSION,	HINT_TELEPHONY },	/* S_TELEPHONY */
	{ HINT_EXTENSION,	HINT_COMM },		/* S_COMM */
	{ HINT_EXTENSION,	HINT_OBEX },		/* S_OBEX */
	{ 0xFF,			0xFF },			/* S_ANY */
};

/*
 * Function irlmp_service_to_hint (service)
 *
 *    Converts a service type, to a hint bit
 *
 *    Returns: a 16 bit hint value, with the service bit set
 */
__u16 irlmp_service_to_hint(int service)
{
	__u16_host_order hint;

	hint.byte[0] = service_hint_mapping[service][0];
	hint.byte[1] = service_hint_mapping[service][1];

	return hint.word;
}
EXPORT_SYMBOL(irlmp_service_to_hint);

/*
 * Function irlmp_register_service (service)
 *
 *    Register local service with IrLMP
 *
 */
void *irlmp_register_service(__u16 hints)
{
	irlmp_service_t *service;

	IRDA_DEBUG(4, "%s(), hints = %04x\n", __FUNCTION__, hints);

	/* Make a new registration */
	service = kmalloc(sizeof(irlmp_service_t), GFP_ATOMIC);
	if (!service) {
		IRDA_DEBUG(1, "%s(), Unable to kmalloc!\n", __FUNCTION__);
		return NULL;
	}
	service->hints.word = hints;
	hashbin_insert(irlmp->services, (irda_queue_t *) service,
		       (long) service, NULL);

	irlmp->hints.word |= hints;

	return (void *)service;
}
EXPORT_SYMBOL(irlmp_register_service);

/*
 * Function irlmp_unregister_service (handle)
 *
 *    Unregister service with IrLMP.
 *
 *    Returns: 0 on success, -1 on error
 */
int irlmp_unregister_service(void *handle)
{
	irlmp_service_t *service;
	unsigned long flags;

	IRDA_DEBUG(4, "%s()\n", __FUNCTION__);

	if (!handle)
		return -1;

	/* Caller may call with invalid handle (it's legal) - Jean II */
	service = hashbin_lock_find(irlmp->services, (long) handle, NULL);
	if (!service) {
		IRDA_DEBUG(1, "%s(), Unknown service!\n", __FUNCTION__);
		return -1;
	}

	hashbin_remove_this(irlmp->services, (irda_queue_t *) service);
	kfree(service);

	/* Remove old hint bits */
	irlmp->hints.word = 0;

	/* Refresh current hint bits */
	spin_lock_irqsave(&irlmp->services->hb_spinlock, flags);
        service = (irlmp_service_t *) hashbin_get_first(irlmp->services);
        while (service) {
		irlmp->hints.word |= service->hints.word;

                service = (irlmp_service_t *)hashbin_get_next(irlmp->services);
        }
	spin_unlock_irqrestore(&irlmp->services->hb_spinlock, flags);
	return 0;
}
EXPORT_SYMBOL(irlmp_unregister_service);

/*
 * Function irlmp_register_client (hint_mask, callback1, callback2)
 *
 *    Register a local client with IrLMP
 *	First callback is selective discovery (based on hints)
 *	Second callback is for selective discovery expiries
 *
 *    Returns: handle > 0 on success, 0 on error
 */
void *irlmp_register_client(__u16 hint_mask, DISCOVERY_CALLBACK1 disco_clb,
			    DISCOVERY_CALLBACK2 expir_clb, void *priv)
{
	irlmp_client_t *client;

	IRDA_DEBUG(1, "%s()\n", __FUNCTION__);
	IRDA_ASSERT(irlmp != NULL, return NULL;);

	/* Make a new registration */
	client = kmalloc(sizeof(irlmp_client_t), GFP_ATOMIC);
	if (!client) {
		IRDA_DEBUG( 1, "%s(), Unable to kmalloc!\n", __FUNCTION__);
		return NULL;
	}

	/* Register the details */
	client->hint_mask.word = hint_mask;
	client->disco_callback = disco_clb;
	client->expir_callback = expir_clb;
	client->priv = priv;

	hashbin_insert(irlmp->clients, (irda_queue_t *) client,
		       (long) client, NULL);

	return (void *) client;
}
EXPORT_SYMBOL(irlmp_register_client);

/*
 * Function irlmp_update_client (handle, hint_mask, callback1, callback2)
 *
 *    Updates specified client (handle) with possibly new hint_mask and
 *    callback
 *
 *    Returns: 0 on success, -1 on error
 */
int irlmp_update_client(void *handle, __u16 hint_mask,
			DISCOVERY_CALLBACK1 disco_clb,
			DISCOVERY_CALLBACK2 expir_clb, void *priv)
{
	irlmp_client_t *client;

	if (!handle)
		return -1;

	client = hashbin_lock_find(irlmp->clients, (long) handle, NULL);
	if (!client) {
		IRDA_DEBUG(1, "%s(), Unknown client!\n", __FUNCTION__);
		return -1;
	}

	client->hint_mask.word = hint_mask;
	client->disco_callback = disco_clb;
	client->expir_callback = expir_clb;
	client->priv = priv;

	return 0;
}
EXPORT_SYMBOL(irlmp_update_client);

/*
 * Function irlmp_unregister_client (handle)
 *
 *    Returns: 0 on success, -1 on error
 *
 */
int irlmp_unregister_client(void *handle)
{
	struct irlmp_client *client;

	IRDA_DEBUG(4, "%s()\n", __FUNCTION__);

	if (!handle)
		return -1;

	/* Caller may call with invalid handle (it's legal) - Jean II */
	client = hashbin_lock_find(irlmp->clients, (long) handle, NULL);
	if (!client) {
		IRDA_DEBUG(1, "%s(), Unknown client!\n", __FUNCTION__);
		return -1;
	}

	IRDA_DEBUG(4, "%s(), removing client!\n", __FUNCTION__);
	hashbin_remove_this(irlmp->clients, (irda_queue_t *) client);
	kfree(client);

	return 0;
}
EXPORT_SYMBOL(irlmp_unregister_client);

/*
 * Function irlmp_slsap_inuse (slsap)
 *
 *    Check if the given source LSAP selector is in use
 *
 * This function is clearly not very efficient. On the mitigating side, the
 * stack make sure that in 99% of the cases, we are called only once
 * for each socket allocation. We could probably keep a bitmap
 * of the allocated LSAP, but I'm not sure the complexity is worth it.
 * Jean II
 */
static int irlmp_slsap_inuse(__u8 slsap_sel)
{
	struct lsap_cb *self;
	struct lap_cb *lap;
	unsigned long flags;

	IRDA_ASSERT(irlmp != NULL, return TRUE;);
	IRDA_ASSERT(irlmp->magic == LMP_MAGIC, return TRUE;);
	IRDA_ASSERT(slsap_sel != LSAP_ANY, return TRUE;);

	IRDA_DEBUG(4, "%s()\n", __FUNCTION__);

#ifdef CONFIG_IRDA_ULTRA
	/* Accept all bindings to the connectionless LSAP */
	if (slsap_sel == LSAP_CONNLESS)
		return FALSE;
#endif /* CONFIG_IRDA_ULTRA */

	/* Valid values are between 0 and 127 (0x0-0x6F) */
	if (slsap_sel > LSAP_MAX)
		return TRUE;

	/*
	 *  Check if slsap is already in use. To do this we have to loop over
	 *  every IrLAP connection and check every LSAP associated with each
	 *  the connection.
	 */
	spin_lock_irqsave(&irlmp->links->hb_spinlock, flags);
	lap = (struct lap_cb *) hashbin_get_first(irlmp->links);
	while (lap != NULL) {
		IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, goto errlap;);

		/* Careful for priority inversions here !
		 * irlmp->links is never taken while another IrDA
		 * spinlock is held, so we are safe. Jean II */
		spin_lock(&lap->lsaps->hb_spinlock);

		/* For this IrLAP, check all the LSAPs */
		self = (struct lsap_cb *) hashbin_get_first(lap->lsaps);
		while (self != NULL) {
			IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC,
				    goto errlsap;);

			if ((self->slsap_sel == slsap_sel)) {
				IRDA_DEBUG(4, "Source LSAP selector=%02x in use\n",
					   self->slsap_sel);
				goto errlsap;
			}
			self = (struct lsap_cb*) hashbin_get_next(lap->lsaps);
		}
		spin_unlock(&lap->lsaps->hb_spinlock);

		/* Next LAP */
		lap = (struct lap_cb *) hashbin_get_next(irlmp->links);
	}
	spin_unlock_irqrestore(&irlmp->links->hb_spinlock, flags);

	/*
	 * Server sockets are typically waiting for connections and
	 * therefore reside in the unconnected list. We don't want
	 * to give out their LSAPs for obvious reasons...
	 * Jean II
	 */
	spin_lock_irqsave(&irlmp->unconnected_lsaps->hb_spinlock, flags);

	self = (struct lsap_cb *) hashbin_get_first(irlmp->unconnected_lsaps);
	while (self != NULL) {
		IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, goto erruncon;);
		if ((self->slsap_sel == slsap_sel)) {
			IRDA_DEBUG(4, "Source LSAP selector=%02x in use (unconnected)\n",
				   self->slsap_sel);
			goto erruncon;
		}
		self = (struct lsap_cb*) hashbin_get_next(irlmp->unconnected_lsaps);
	}
	spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock, flags);

	return FALSE;

	/* Error exit from within one of the two nested loops.
	 * Make sure we release the right spinlock in the righ order.
	 * Jean II */
errlsap:
	spin_unlock(&lap->lsaps->hb_spinlock);
IRDA_ASSERT_LABEL(errlap:)
	spin_unlock_irqrestore(&irlmp->links->hb_spinlock, flags);
	return TRUE;

	/* Error exit from within the unconnected loop.
	 * Just one spinlock to release... Jean II */
erruncon:
	spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock, flags);
	return TRUE;
}

/*
 * Function irlmp_find_free_slsap ()
 *
 *    Find a free source LSAP to use. This function is called if the service
 *    user has requested a source LSAP equal to LM_ANY
 */
static __u8 irlmp_find_free_slsap(void)
{
	__u8 lsap_sel;
	int wrapped = 0;

	IRDA_ASSERT(irlmp != NULL, return -1;);
	IRDA_ASSERT(irlmp->magic == LMP_MAGIC, return -1;);

	/* Most users don't really care which LSAPs they are given,
	 * and therefore we automatically give them a free LSAP.
	 * This function try to find a suitable LSAP, i.e. which is
	 * not in use and is within the acceptable range. Jean II */

	do {
		/* Always increment to LSAP number before using it.
		 * In theory, we could reuse the last LSAP number, as long
		 * as it is no longer in use. Some IrDA stack do that.
		 * However, the previous socket may be half closed, i.e.
		 * we closed it, we think it's no longer in use, but the
		 * other side did not receive our close and think it's
		 * active and still send data on it.
		 * This is similar to what is done with PIDs and TCP ports.
		 * Also, this reduce the number of calls to irlmp_slsap_inuse()
		 * which is an expensive function to call.
		 * Jean II */
		irlmp->last_lsap_sel++;

		/* Check if we need to wraparound (0x70-0x7f are reserved) */
		if (irlmp->last_lsap_sel > LSAP_MAX) {
			/* 0x00-0x10 are also reserved for well know ports */
			irlmp->last_lsap_sel = 0x10;

			/* Make sure we terminate the loop */
			if (wrapped++) {
				IRDA_ERROR("%s: no more free LSAPs !\n",
					   __FUNCTION__);
				return 0;
			}
		}

		/* If the LSAP is in use, try the next one.
		 * Despite the autoincrement, we need to check if the lsap
		 * is really in use or not, first because LSAP may be
		 * directly allocated in irlmp_open_lsap(), and also because
		 * we may wraparound on old sockets. Jean II */
	} while (irlmp_slsap_inuse(irlmp->last_lsap_sel));

	/* Got it ! */
	lsap_sel = irlmp->last_lsap_sel;
	IRDA_DEBUG(4, "%s(), found free lsap_sel=%02x\n",
		   __FUNCTION__, lsap_sel);

	return lsap_sel;
}

/*
 * Function irlmp_convert_lap_reason (lap_reason)
 *
 *    Converts IrLAP disconnect reason codes to IrLMP disconnect reason
 *    codes
 *
 */
LM_REASON irlmp_convert_lap_reason( LAP_REASON lap_reason)
{
	int reason = LM_LAP_DISCONNECT;

	switch (lap_reason) {
	case LAP_DISC_INDICATION: /* Received a disconnect request from peer */
		IRDA_DEBUG( 1, "%s(), LAP_DISC_INDICATION\n", __FUNCTION__);
		reason = LM_USER_REQUEST;
		break;
	case LAP_NO_RESPONSE:    /* To many retransmits without response */
		IRDA_DEBUG( 1, "%s(), LAP_NO_RESPONSE\n", __FUNCTION__);
		reason = LM_LAP_DISCONNECT;
		break;
	case LAP_RESET_INDICATION:
		IRDA_DEBUG( 1, "%s(), LAP_RESET_INDICATION\n", __FUNCTION__);
		reason = LM_LAP_RESET;
		break;
	case LAP_FOUND_NONE:
	case LAP_MEDIA_BUSY:
	case LAP_PRIMARY_CONFLICT:
		IRDA_DEBUG(1, "%s(), LAP_FOUND_NONE, LAP_MEDIA_BUSY or LAP_PRIMARY_CONFLICT\n", __FUNCTION__);
		reason = LM_CONNECT_FAILURE;
		break;
	default:
		IRDA_DEBUG(1, "%s(), Unknow IrLAP disconnect reason %d!\n",
			   __FUNCTION__, lap_reason);
		reason = LM_LAP_DISCONNECT;
		break;
	}

	return reason;
}

#ifdef CONFIG_PROC_FS

struct irlmp_iter_state {
	hashbin_t *hashbin;
};

#define LSAP_START_TOKEN	((void *)1)
#define LINK_START_TOKEN	((void *)2)

static void *irlmp_seq_hb_idx(struct irlmp_iter_state *iter, loff_t *off)
{
	void *element;

	spin_lock_irq(&iter->hashbin->hb_spinlock);
	for (element = hashbin_get_first(iter->hashbin);
	     element != NULL; 
	     element = hashbin_get_next(iter->hashbin)) {
		if (!off || *off-- == 0) {
			/* NB: hashbin left locked */
			return element;
		}
	}
	spin_unlock_irq(&iter->hashbin->hb_spinlock);
	iter->hashbin = NULL;
	return NULL;
}


static void *irlmp_seq_start(struct seq_file *seq, loff_t *pos)
{
	struct irlmp_iter_state *iter = seq->private;
	void *v;
	loff_t off = *pos;

	iter->hashbin = NULL;
	if (off-- == 0)
		return LSAP_START_TOKEN;

	iter->hashbin = irlmp->unconnected_lsaps;
	v = irlmp_seq_hb_idx(iter, &off);
	if (v)
		return v;

	if (off-- == 0)
		return LINK_START_TOKEN;

	iter->hashbin = irlmp->links;
	return irlmp_seq_hb_idx(iter, &off);
}

static void *irlmp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	struct irlmp_iter_state *iter = seq->private;

	++*pos;

	if (v == LSAP_START_TOKEN) {		/* start of list of lsaps */
		iter->hashbin = irlmp->unconnected_lsaps;
		v = irlmp_seq_hb_idx(iter, NULL);
		return v ? v : LINK_START_TOKEN;
	}

	if (v == LINK_START_TOKEN) {		/* start of list of links */
		iter->hashbin = irlmp->links;
		return irlmp_seq_hb_idx(iter, NULL);
	}

	v = hashbin_get_next(iter->hashbin);

	if (v == NULL) {			/* no more in this hash bin */
		spin_unlock_irq(&iter->hashbin->hb_spinlock);

		if (iter->hashbin == irlmp->unconnected_lsaps) 
			v =  LINK_START_TOKEN;

		iter->hashbin = NULL;
	}
	return v;
}

static void irlmp_seq_stop(struct seq_file *seq, void *v)
{
	struct irlmp_iter_state *iter = seq->private;

	if (iter->hashbin)
		spin_unlock_irq(&iter->hashbin->hb_spinlock);
}

static int irlmp_seq_show(struct seq_file *seq, void *v)
{
	const struct irlmp_iter_state *iter = seq->private;
	struct lsap_cb *self = v;

	if (v == LSAP_START_TOKEN)
		seq_puts(seq, "Unconnected LSAPs:\n");
	else if (v == LINK_START_TOKEN)
		seq_puts(seq, "\nRegistered Link Layers:\n");
	else if (iter->hashbin == irlmp->unconnected_lsaps) {
		self = v;
		IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -EINVAL; );
		seq_printf(seq, "lsap state: %s, ",
			   irlsap_state[ self->lsap_state]);
		seq_printf(seq,
			   "slsap_sel: %#02x, dlsap_sel: %#02x, ",
			   self->slsap_sel, self->dlsap_sel);
		seq_printf(seq, "(%s)", self->notify.name);
		seq_printf(seq, "\n");
	} else if (iter->hashbin == irlmp->links) {
		struct lap_cb *lap = v;

		seq_printf(seq, "lap state: %s, ",
			   irlmp_state[lap->lap_state]);

		seq_printf(seq, "saddr: %#08x, daddr: %#08x, ",
			   lap->saddr, lap->daddr);
		seq_printf(seq, "num lsaps: %d",
			   HASHBIN_GET_SIZE(lap->lsaps));
		seq_printf(seq, "\n");

		/* Careful for priority inversions here !
		 * All other uses of attrib spinlock are independent of
		 * the object spinlock, so we are safe. Jean II */
		spin_lock(&lap->lsaps->hb_spinlock);

		seq_printf(seq, "\n  Connected LSAPs:\n");
		for (self = (struct lsap_cb *) hashbin_get_first(lap->lsaps);
		     self != NULL;
		     self = (struct lsap_cb *)hashbin_get_next(lap->lsaps)) {
			IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC,
				    goto outloop;);
			seq_printf(seq, "  lsap state: %s, ",
				   irlsap_state[ self->lsap_state]);
			seq_printf(seq,
				   "slsap_sel: %#02x, dlsap_sel: %#02x, ",
				   self->slsap_sel, self->dlsap_sel);
			seq_printf(seq, "(%s)", self->notify.name);
			seq_putc(seq, '\n');

		}
	IRDA_ASSERT_LABEL(outloop:)
		spin_unlock(&lap->lsaps->hb_spinlock);
		seq_putc(seq, '\n');
	} else
		return -EINVAL;

	return 0;
}

static struct seq_operations irlmp_seq_ops = {
	.start  = irlmp_seq_start,
	.next   = irlmp_seq_next,
	.stop   = irlmp_seq_stop,
	.show   = irlmp_seq_show,
};

static int irlmp_seq_open(struct inode *inode, struct file *file)
{
	struct seq_file *seq;
	int rc = -ENOMEM;
	struct irlmp_iter_state *s;

	IRDA_ASSERT(irlmp != NULL, return -EINVAL;);

	s = kmalloc(sizeof(*s), GFP_KERNEL);
	if (!s)
		goto out;

	rc = seq_open(file, &irlmp_seq_ops);
	if (rc)
		goto out_kfree;

	seq	     = file->private_data;
	seq->private = s;
out:
	return rc;
out_kfree:
	kfree(s);
	goto out;
}

struct file_operations irlmp_seq_fops = {
	.owner		= THIS_MODULE,
	.open           = irlmp_seq_open,
	.read           = seq_read,
	.llseek         = seq_lseek,
	.release	= seq_release_private,
};

#endif /* PROC_FS */