summaryrefslogtreecommitdiff
path: root/net/irda/irlan/irlan_common.c
blob: 657d12210578eeb8e4a478ba14903fdda85d7992 (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
/*********************************************************************
 *                
 * Filename:      irlan_common.c
 * Version:       0.9
 * Description:   IrDA LAN Access Protocol Implementation
 * Status:        Experimental.
 * Author:        Dag Brattli <dagb@cs.uit.no>
 * Created at:    Sun Aug 31 20:14:37 1997
 * Modified at:   Sun Dec 26 21:53:10 1999
 * Modified by:   Dag Brattli <dagb@cs.uit.no>
 * 
 *     Copyright (c) 1997, 1999 Dag Brattli <dagb@cs.uit.no>, 
 *     All Rights Reserved.
 *     
 *     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 Tromsø 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/kernel.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/random.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/rtnetlink.h>
#include <linux/moduleparam.h>
#include <linux/bitops.h>

#include <asm/system.h>
#include <asm/byteorder.h>

#include <net/irda/irda.h>
#include <net/irda/irttp.h>
#include <net/irda/irlmp.h>
#include <net/irda/iriap.h>
#include <net/irda/timer.h>

#include <net/irda/irlan_common.h>
#include <net/irda/irlan_client.h>
#include <net/irda/irlan_provider.h> 
#include <net/irda/irlan_eth.h>
#include <net/irda/irlan_filter.h>


/* 
 * Send gratuitous ARP when connected to a new AP or not. May be a clever
 * thing to do, but for some reason the machine crashes if you use DHCP. So
 * lets not use it by default.
 */
#undef CONFIG_IRLAN_SEND_GRATUITOUS_ARP

/* extern char sysctl_devname[]; */

/*
 *  Master structure
 */
static LIST_HEAD(irlans);

static void *ckey;
static void *skey;

/* Module parameters */
static int eth;   /* Use "eth" or "irlan" name for devices */
static int access = ACCESS_PEER; /* PEER, DIRECT or HOSTED */

#ifdef CONFIG_PROC_FS
static const char *irlan_access[] = {
	"UNKNOWN",
	"DIRECT",
	"PEER",
	"HOSTED"
};

static const char *irlan_media[] = {
	"UNKNOWN",
	"802.3",
	"802.5"
};

extern struct proc_dir_entry *proc_irda;

static int irlan_seq_open(struct inode *inode, struct file *file);

static struct file_operations irlan_fops = {
	.owner	 = THIS_MODULE,
	.open    = irlan_seq_open,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.release = seq_release,
};

extern struct proc_dir_entry *proc_irda;
#endif /* CONFIG_PROC_FS */

static struct irlan_cb *irlan_open(__u32 saddr, __u32 daddr);
static void __irlan_close(struct irlan_cb *self);
static int __irlan_insert_param(struct sk_buff *skb, char *param, int type, 
				__u8 value_byte, __u16 value_short, 
				__u8 *value_array, __u16 value_len);
static void irlan_open_unicast_addr(struct irlan_cb *self);
static void irlan_get_unicast_addr(struct irlan_cb *self);
void irlan_close_tsaps(struct irlan_cb *self);

/*
 * Function irlan_init (void)
 *
 *    Initialize IrLAN layer
 *
 */
static int __init irlan_init(void)
{
	struct irlan_cb *new;
	__u16 hints;

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

#ifdef CONFIG_PROC_FS
	{ struct proc_dir_entry *proc;
	proc = create_proc_entry("irlan", 0, proc_irda);
	if (!proc) {
		printk(KERN_ERR "irlan_init: can't create /proc entry!\n");
		return -ENODEV;
	}

	proc->proc_fops = &irlan_fops;
	}
#endif /* CONFIG_PROC_FS */

	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
	hints = irlmp_service_to_hint(S_LAN);

	/* Register with IrLMP as a client */
	ckey = irlmp_register_client(hints, &irlan_client_discovery_indication,
				     NULL, NULL);
	
	/* Register with IrLMP as a service */
 	skey = irlmp_register_service(hints);

	/* Start the master IrLAN instance (the only one for now) */
 	new = irlan_open(DEV_ADDR_ANY, DEV_ADDR_ANY);

	/* The master will only open its (listen) control TSAP */
	irlan_provider_open_ctrl_tsap(new);

	/* Do some fast discovery! */
	irlmp_discovery_request(DISCOVERY_DEFAULT_SLOTS);

	return 0;
}

static void __exit irlan_cleanup(void) 
{
	struct irlan_cb *self, *next;

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

	irlmp_unregister_client(ckey);
	irlmp_unregister_service(skey);

#ifdef CONFIG_PROC_FS
	remove_proc_entry("irlan", proc_irda);
#endif /* CONFIG_PROC_FS */

	/* Cleanup any leftover network devices */
	rtnl_lock();
	list_for_each_entry_safe(self, next, &irlans, dev_list) {
		__irlan_close(self);
	}
	rtnl_unlock();
}

/*
 * Function irlan_open (void)
 *
 *    Open new instance of a client/provider, we should only register the 
 *    network device if this instance is ment for a particular client/provider
 */
static struct irlan_cb *irlan_open(__u32 saddr, __u32 daddr)
{
	struct net_device *dev;
	struct irlan_cb *self;

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

	/* Create network device with irlan */
	dev = alloc_irlandev(eth ? "eth%d" : "irlan%d");
	if (!dev)
		return NULL;

	self = dev->priv;
	self->dev = dev;

	/*
	 *  Initialize local device structure
	 */
	self->magic = IRLAN_MAGIC;
	self->saddr = saddr;
	self->daddr = daddr;

	/* Provider access can only be PEER, DIRECT, or HOSTED */
	self->provider.access_type = access;
	if (access == ACCESS_DIRECT) {
		/*  
		 * Since we are emulating an IrLAN sever we will have to
		 * give ourself an ethernet address!  
		 */
		dev->dev_addr[0] = 0x40;
		dev->dev_addr[1] = 0x00;
		dev->dev_addr[2] = 0x00;
		dev->dev_addr[3] = 0x00;
		get_random_bytes(dev->dev_addr+4, 1);
		get_random_bytes(dev->dev_addr+5, 1);
	}

	self->media = MEDIA_802_3;
	self->disconnect_reason = LM_USER_REQUEST;
	init_timer(&self->watchdog_timer);
	init_timer(&self->client.kick_timer);
	init_waitqueue_head(&self->open_wait);	
	
	skb_queue_head_init(&self->client.txq);
	
	irlan_next_client_state(self, IRLAN_IDLE);
	irlan_next_provider_state(self, IRLAN_IDLE);

	if (register_netdev(dev)) {
		IRDA_DEBUG(2, "%s(), register_netdev() failed!\n", 
			   __FUNCTION__ );
		self = NULL;
		free_netdev(dev);
	} else {
		rtnl_lock();
		list_add_rcu(&self->dev_list, &irlans);
		rtnl_unlock();
	}

	return self;
}
/*
 * Function __irlan_close (self)
 *
 *    This function closes and deallocates the IrLAN client instances. Be 
 *    aware that other functions which calls client_close() must
 *    remove self from irlans list first.
 */
static void __irlan_close(struct irlan_cb *self)
{
	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
	
	ASSERT_RTNL();
	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);

	del_timer_sync(&self->watchdog_timer);
	del_timer_sync(&self->client.kick_timer);

	/* Close all open connections and remove TSAPs */
	irlan_close_tsaps(self);
	
	if (self->client.iriap) 
		iriap_close(self->client.iriap);

	/* Remove frames queued on the control channel */
	skb_queue_purge(&self->client.txq);

	/* Unregister and free self via destructor */
	unregister_netdevice(self->dev);
}

/* Find any instance of irlan, used for client discovery wakeup */
struct irlan_cb *irlan_get_any(void)
{
	struct irlan_cb *self;

	list_for_each_entry_rcu(self, &irlans, dev_list) {
		return self;
	}
	return NULL;
}

/*
 * Function irlan_connect_indication (instance, sap, qos, max_sdu_size, skb)
 *
 *    Here we receive the connect indication for the data channel
 *
 */
static void irlan_connect_indication(void *instance, void *sap,
				     struct qos_info *qos,
				     __u32 max_sdu_size,
				     __u8 max_header_size, 
				     struct sk_buff *skb)
{
	struct irlan_cb *self;
	struct tsap_cb *tsap;

	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
	
	self = (struct irlan_cb *) instance;
	tsap = (struct tsap_cb *) sap;
	
	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
	IRDA_ASSERT(tsap == self->tsap_data,return;);

	self->max_sdu_size = max_sdu_size;
	self->max_header_size = max_header_size;

	IRDA_DEBUG(0, "%s: We are now connected!\n", __FUNCTION__);

	del_timer(&self->watchdog_timer);

	/* If you want to pass the skb to *both* state machines, you will
	 * need to skb_clone() it, so that you don't free it twice.
	 * As the state machines don't need it, git rid of it here...
	 * Jean II */
	if (skb)
		dev_kfree_skb(skb);

	irlan_do_provider_event(self, IRLAN_DATA_CONNECT_INDICATION, NULL);
	irlan_do_client_event(self, IRLAN_DATA_CONNECT_INDICATION, NULL);

	if (self->provider.access_type == ACCESS_PEER) {
		/* 
		 * Data channel is open, so we are now allowed to
		 * configure the remote filter 
		 */
		irlan_get_unicast_addr(self);
		irlan_open_unicast_addr(self);
	}
	/* Ready to transfer Ethernet frames (at last) */
	netif_start_queue(self->dev); /* Clear reason */
}

static void irlan_connect_confirm(void *instance, void *sap,
				  struct qos_info *qos, 
				  __u32 max_sdu_size,
				  __u8 max_header_size, 
				  struct sk_buff *skb) 
{
	struct irlan_cb *self;

	self = (struct irlan_cb *) instance;

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

	self->max_sdu_size = max_sdu_size;
	self->max_header_size = max_header_size;

	/* TODO: we could set the MTU depending on the max_sdu_size */

	IRDA_DEBUG(0, "%s: We are now connected!\n", __FUNCTION__);
	del_timer(&self->watchdog_timer);

	/* 
	 * Data channel is open, so we are now allowed to configure the remote
	 * filter 
	 */
	irlan_get_unicast_addr(self);
	irlan_open_unicast_addr(self);
	
	/* Open broadcast and multicast filter by default */
 	irlan_set_broadcast_filter(self, TRUE);
 	irlan_set_multicast_filter(self, TRUE);

	/* Ready to transfer Ethernet frames */
	netif_start_queue(self->dev);
	self->disconnect_reason = 0; /* Clear reason */
#ifdef CONFIG_IRLAN_SEND_GRATUITOUS_ARP
	irlan_eth_send_gratuitous_arp(&self->dev);
#endif
	wake_up_interruptible(&self->open_wait);
}

/*
 * Function irlan_client_disconnect_indication (handle)
 *
 *    Callback function for the IrTTP layer. Indicates a disconnection of
 *    the specified connection (handle)
 */
static void irlan_disconnect_indication(void *instance,
					void *sap, LM_REASON reason, 
					struct sk_buff *userdata) 
{
	struct irlan_cb *self;
	struct tsap_cb *tsap;

	IRDA_DEBUG(0, "%s(), reason=%d\n", __FUNCTION__ , reason);
	
	self = (struct irlan_cb *) instance;
	tsap = (struct tsap_cb *) sap;

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);	
	IRDA_ASSERT(tsap != NULL, return;);
	IRDA_ASSERT(tsap->magic == TTP_TSAP_MAGIC, return;);
	
	IRDA_ASSERT(tsap == self->tsap_data, return;);

	IRDA_DEBUG(2, "IrLAN, data channel disconnected by peer!\n");

	/* Save reason so we know if we should try to reconnect or not */
	self->disconnect_reason = reason;
	
	switch (reason) {
	case LM_USER_REQUEST: /* User request */
		IRDA_DEBUG(2, "%s(), User requested\n", __FUNCTION__ );
		break;
	case LM_LAP_DISCONNECT: /* Unexpected IrLAP disconnect */
		IRDA_DEBUG(2, "%s(), Unexpected IrLAP disconnect\n", __FUNCTION__ );
		break;
	case LM_CONNECT_FAILURE: /* Failed to establish IrLAP connection */
		IRDA_DEBUG(2, "%s(), IrLAP connect failed\n", __FUNCTION__ );
		break;
	case LM_LAP_RESET:  /* IrLAP reset */
		IRDA_DEBUG(2, "%s(), IrLAP reset\n", __FUNCTION__ );
		break;
	case LM_INIT_DISCONNECT:
		IRDA_DEBUG(2, "%s(), IrLMP connect failed\n", __FUNCTION__ );
		break;
	default:
		IRDA_ERROR("%s(), Unknown disconnect reason\n", __FUNCTION__);
		break;
	}
	
	/* If you want to pass the skb to *both* state machines, you will
	 * need to skb_clone() it, so that you don't free it twice.
	 * As the state machines don't need it, git rid of it here...
	 * Jean II */
	if (userdata)
		dev_kfree_skb(userdata);

	irlan_do_client_event(self, IRLAN_LMP_DISCONNECT, NULL);
	irlan_do_provider_event(self, IRLAN_LMP_DISCONNECT, NULL);
	
	wake_up_interruptible(&self->open_wait);
}

void irlan_open_data_tsap(struct irlan_cb *self)
{
	struct tsap_cb *tsap;
	notify_t notify;

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

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

	/* Check if already open */
	if (self->tsap_data)
		return;

	irda_notify_init(&notify);
	
	notify.data_indication       = irlan_eth_receive;
	notify.udata_indication      = irlan_eth_receive;
	notify.connect_indication    = irlan_connect_indication;
	notify.connect_confirm       = irlan_connect_confirm;
 	notify.flow_indication       = irlan_eth_flow_indication;
	notify.disconnect_indication = irlan_disconnect_indication;
	notify.instance              = self;
	strlcpy(notify.name, "IrLAN data", sizeof(notify.name));

	tsap = irttp_open_tsap(LSAP_ANY, DEFAULT_INITIAL_CREDIT, &notify);
	if (!tsap) {
		IRDA_DEBUG(2, "%s(), Got no tsap!\n", __FUNCTION__ );
		return;
	}
	self->tsap_data = tsap;

	/* 
	 *  This is the data TSAP selector which we will pass to the client
	 *  when the client ask for it.
	 */
	self->stsap_sel_data = self->tsap_data->stsap_sel;
}

void irlan_close_tsaps(struct irlan_cb *self)
{
	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );

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

	/* Disconnect and close all open TSAP connections */
	if (self->tsap_data) {
		irttp_disconnect_request(self->tsap_data, NULL, P_NORMAL);
		irttp_close_tsap(self->tsap_data);
		self->tsap_data = NULL;
	}
	if (self->client.tsap_ctrl) {
		irttp_disconnect_request(self->client.tsap_ctrl, NULL, 
					 P_NORMAL);
		irttp_close_tsap(self->client.tsap_ctrl);
		self->client.tsap_ctrl = NULL;
	}
	if (self->provider.tsap_ctrl) {
		irttp_disconnect_request(self->provider.tsap_ctrl, NULL, 
					 P_NORMAL);
		irttp_close_tsap(self->provider.tsap_ctrl);
		self->provider.tsap_ctrl = NULL;
	}
	self->disconnect_reason = LM_USER_REQUEST;
}

/*
 * Function irlan_ias_register (self, tsap_sel)
 *
 *    Register with LM-IAS
 *
 */
void irlan_ias_register(struct irlan_cb *self, __u8 tsap_sel)
{
	struct ias_object *obj;
	struct ias_value *new_value;

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
	
	/* 
	 * Check if object has already been registered by a previous provider.
	 * If that is the case, we just change the value of the attribute
	 */
	if (!irias_find_object("IrLAN")) {
		obj = irias_new_object("IrLAN", IAS_IRLAN_ID);
		irias_add_integer_attrib(obj, "IrDA:TinyTP:LsapSel", tsap_sel,
					 IAS_KERNEL_ATTR);
		irias_insert_object(obj);
	} else {
		new_value = irias_new_integer_value(tsap_sel);
		irias_object_change_attribute("IrLAN", "IrDA:TinyTP:LsapSel",
					      new_value);
	}
	
        /* Register PnP object only if not registered before */
        if (!irias_find_object("PnP")) {
		obj = irias_new_object("PnP", IAS_PNP_ID);
#if 0
		irias_add_string_attrib(obj, "Name", sysctl_devname,
					IAS_KERNEL_ATTR);
#else
		irias_add_string_attrib(obj, "Name", "Linux", IAS_KERNEL_ATTR);
#endif
		irias_add_string_attrib(obj, "DeviceID", "HWP19F0",
					IAS_KERNEL_ATTR);
		irias_add_integer_attrib(obj, "CompCnt", 1, IAS_KERNEL_ATTR);
		if (self->provider.access_type == ACCESS_PEER)
			irias_add_string_attrib(obj, "Comp#01", "PNP8389",
						IAS_KERNEL_ATTR);
		else
			irias_add_string_attrib(obj, "Comp#01", "PNP8294",
						IAS_KERNEL_ATTR);

		irias_add_string_attrib(obj, "Manufacturer",
					"Linux-IrDA Project", IAS_KERNEL_ATTR);
		irias_insert_object(obj);
	}
}

/*
 * Function irlan_run_ctrl_tx_queue (self)
 *
 *    Try to send the next command in the control transmit queue
 *
 */
int irlan_run_ctrl_tx_queue(struct irlan_cb *self)
{
	struct sk_buff *skb;

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

	if (irda_lock(&self->client.tx_busy) == FALSE)
		return -EBUSY;

	skb = skb_dequeue(&self->client.txq);
	if (!skb) {
		self->client.tx_busy = FALSE;
		return 0;
	}
	
	/* Check that it's really possible to send commands */
	if ((self->client.tsap_ctrl == NULL) || 
	    (self->client.state == IRLAN_IDLE)) 
	{
		self->client.tx_busy = FALSE;
		dev_kfree_skb(skb);
		return -1;
	}
	IRDA_DEBUG(2, "%s(), sending ...\n", __FUNCTION__ );

	return irttp_data_request(self->client.tsap_ctrl, skb);
}

/*
 * Function irlan_ctrl_data_request (self, skb)
 *
 *    This function makes sure that commands on the control channel is being
 *    sent in a command/response fashion
 */
static void irlan_ctrl_data_request(struct irlan_cb *self, struct sk_buff *skb)
{
	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );

	/* Queue command */
	skb_queue_tail(&self->client.txq, skb);

	/* Try to send command */
	irlan_run_ctrl_tx_queue(self);
}

/*
 * Function irlan_get_provider_info (self)
 *
 *    Send Get Provider Information command to peer IrLAN layer
 *
 */
void irlan_get_provider_info(struct irlan_cb *self)
{
	struct sk_buff *skb;
	__u8 *frame;

	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
	
	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);

	skb = dev_alloc_skb(64);
	if (!skb)
		return;

	/* Reserve space for TTP, LMP, and LAP header */
	skb_reserve(skb, self->client.max_header_size);
	skb_put(skb, 2);
	
	frame = skb->data;
	
 	frame[0] = CMD_GET_PROVIDER_INFO;
	frame[1] = 0x00;                 /* Zero parameters */
	
	irlan_ctrl_data_request(self, skb);
}

/*
 * Function irlan_open_data_channel (self)
 *
 *    Send an Open Data Command to provider
 *
 */
void irlan_open_data_channel(struct irlan_cb *self) 
{
	struct sk_buff *skb;
	__u8 *frame;
	
	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
	
	skb = dev_alloc_skb(64);
	if (!skb)
		return;

	skb_reserve(skb, self->client.max_header_size);
	skb_put(skb, 2);
	
	frame = skb->data;
	
	/* Build frame */
 	frame[0] = CMD_OPEN_DATA_CHANNEL;
	frame[1] = 0x02; /* Two parameters */

	irlan_insert_string_param(skb, "MEDIA", "802.3");
	irlan_insert_string_param(skb, "ACCESS_TYPE", "DIRECT");
	/* irlan_insert_string_param(skb, "MODE", "UNRELIABLE"); */

/* 	self->use_udata = TRUE; */

	irlan_ctrl_data_request(self, skb);
}

void irlan_close_data_channel(struct irlan_cb *self) 
{
	struct sk_buff *skb;
	__u8 *frame;
	
	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );

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

	/* Check if the TSAP is still there */
	if (self->client.tsap_ctrl == NULL)
		return;

	skb = dev_alloc_skb(64);
	if (!skb)
		return;

	skb_reserve(skb, self->client.max_header_size);
	skb_put(skb, 2);
	
	frame = skb->data;
	
	/* Build frame */
 	frame[0] = CMD_CLOSE_DATA_CHAN;
	frame[1] = 0x01; /* Two parameters */

	irlan_insert_byte_param(skb, "DATA_CHAN", self->dtsap_sel_data);

	irlan_ctrl_data_request(self, skb);
}

/*
 * Function irlan_open_unicast_addr (self)
 *
 *    Make IrLAN provider accept ethernet frames addressed to the unicast 
 *    address.
 *
 */
static void irlan_open_unicast_addr(struct irlan_cb *self)
{
	struct sk_buff *skb;
	__u8 *frame;
	
	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);	
	
	skb = dev_alloc_skb(128);
	if (!skb)
		return;

	/* Reserve space for TTP, LMP, and LAP header */
	skb_reserve(skb, self->max_header_size);
	skb_put(skb, 2);
	
	frame = skb->data;
	
 	frame[0] = CMD_FILTER_OPERATION;
	frame[1] = 0x03;                 /* Three parameters */
 	irlan_insert_byte_param(skb, "DATA_CHAN" , self->dtsap_sel_data);
 	irlan_insert_string_param(skb, "FILTER_TYPE", "DIRECTED");
 	irlan_insert_string_param(skb, "FILTER_MODE", "FILTER"); 
	
	irlan_ctrl_data_request(self, skb);
}

/*
 * Function irlan_set_broadcast_filter (self, status)
 *
 *    Make IrLAN provider accept ethernet frames addressed to the broadcast
 *    address. Be careful with the use of this one, since there may be a lot
 *    of broadcast traffic out there. We can still function without this
 *    one but then _we_ have to initiate all communication with other
 *    hosts, since ARP request for this host will not be answered.
 */
void irlan_set_broadcast_filter(struct irlan_cb *self, int status) 
{
	struct sk_buff *skb;
	__u8 *frame;
	
	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
	
 	skb = dev_alloc_skb(128);
	if (!skb)
		return;

	/* Reserve space for TTP, LMP, and LAP header */
	skb_reserve(skb, self->client.max_header_size);
	skb_put(skb, 2);
	
	frame = skb->data;
	
 	frame[0] = CMD_FILTER_OPERATION;
	frame[1] = 0x03;                 /* Three parameters */
 	irlan_insert_byte_param(skb, "DATA_CHAN", self->dtsap_sel_data);
 	irlan_insert_string_param(skb, "FILTER_TYPE", "BROADCAST");
	if (status)
		irlan_insert_string_param(skb, "FILTER_MODE", "FILTER"); 
	else
		irlan_insert_string_param(skb, "FILTER_MODE", "NONE"); 

	irlan_ctrl_data_request(self, skb);
}

/*
 * Function irlan_set_multicast_filter (self, status)
 *
 *    Make IrLAN provider accept ethernet frames addressed to the multicast
 *    address. 
 *
 */
void irlan_set_multicast_filter(struct irlan_cb *self, int status) 
{
	struct sk_buff *skb;
	__u8 *frame;
	
	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );

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

 	skb = dev_alloc_skb(128);
	if (!skb)
		return;
	
	/* Reserve space for TTP, LMP, and LAP header */
	skb_reserve(skb, self->client.max_header_size);
	skb_put(skb, 2);
	
	frame = skb->data;
	
 	frame[0] = CMD_FILTER_OPERATION;
	frame[1] = 0x03;                 /* Three parameters */
 	irlan_insert_byte_param(skb, "DATA_CHAN", self->dtsap_sel_data);
 	irlan_insert_string_param(skb, "FILTER_TYPE", "MULTICAST");
	if (status)
		irlan_insert_string_param(skb, "FILTER_MODE", "ALL"); 
	else
		irlan_insert_string_param(skb, "FILTER_MODE", "NONE"); 

	irlan_ctrl_data_request(self, skb);
}

/*
 * Function irlan_get_unicast_addr (self)
 *
 *    Retrieves the unicast address from the IrLAN provider. This address
 *    will be inserted into the devices structure, so the ethernet layer
 *    can construct its packets.
 *
 */
static void irlan_get_unicast_addr(struct irlan_cb *self)
{
	struct sk_buff *skb;
	__u8 *frame;
		
	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
	
	skb = dev_alloc_skb(128);
	if (!skb)
		return;

	/* Reserve space for TTP, LMP, and LAP header */
	skb_reserve(skb, self->client.max_header_size);
	skb_put(skb, 2);
	
	frame = skb->data;
	
 	frame[0] = CMD_FILTER_OPERATION;
	frame[1] = 0x03;                 /* Three parameters */
 	irlan_insert_byte_param(skb, "DATA_CHAN", self->dtsap_sel_data);
 	irlan_insert_string_param(skb, "FILTER_TYPE", "DIRECTED");
 	irlan_insert_string_param(skb, "FILTER_OPERATION", "DYNAMIC"); 
	
	irlan_ctrl_data_request(self, skb);
}

/*
 * Function irlan_get_media_char (self)
 *
 *    
 *
 */
void irlan_get_media_char(struct irlan_cb *self) 
{
	struct sk_buff *skb;
	__u8 *frame;
	
	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
	
	skb = dev_alloc_skb(64);
	if (!skb)
		return;

	/* Reserve space for TTP, LMP, and LAP header */
	skb_reserve(skb, self->client.max_header_size);
	skb_put(skb, 2);
	
	frame = skb->data;
	
	/* Build frame */
 	frame[0] = CMD_GET_MEDIA_CHAR;
	frame[1] = 0x01; /* One parameter */
	
	irlan_insert_string_param(skb, "MEDIA", "802.3");
	irlan_ctrl_data_request(self, skb);
}

/*
 * Function insert_byte_param (skb, param, value)
 *
 *    Insert byte parameter into frame
 *
 */
int irlan_insert_byte_param(struct sk_buff *skb, char *param, __u8 value)
{
	return __irlan_insert_param(skb, param, IRLAN_BYTE, value, 0, NULL, 0);
}

int irlan_insert_short_param(struct sk_buff *skb, char *param, __u16 value)
{
	return __irlan_insert_param(skb, param, IRLAN_SHORT, 0, value, NULL, 0);
}

/*
 * Function insert_string (skb, param, value)
 *
 *    Insert string parameter into frame
 *
 */
int irlan_insert_string_param(struct sk_buff *skb, char *param, char *string)
{
	int string_len = strlen(string);

	return __irlan_insert_param(skb, param, IRLAN_ARRAY, 0, 0, string, 
				    string_len);
}

/*
 * Function insert_array_param(skb, param, value, len_value)
 *
 *    Insert array parameter into frame
 *
 */
int irlan_insert_array_param(struct sk_buff *skb, char *name, __u8 *array,
			     __u16 array_len)
{
	return __irlan_insert_param(skb, name, IRLAN_ARRAY, 0, 0, array, 
				    array_len);
}

/*
 * Function insert_param (skb, param, value, byte)
 *
 *    Insert parameter at end of buffer, structure of a parameter is:
 *
 *    -----------------------------------------------------------------------
 *    | Name Length[1] | Param Name[1..255] | Val Length[2] | Value[0..1016]|
 *    -----------------------------------------------------------------------
 */
static int __irlan_insert_param(struct sk_buff *skb, char *param, int type, 
				__u8 value_byte, __u16 value_short, 
				__u8 *value_array, __u16 value_len)
{
	__u8 *frame;
	__u8 param_len;
	__u16 tmp_le; /* Temporary value in little endian format */
	int n=0;
	
	if (skb == NULL) {
		IRDA_DEBUG(2, "%s(), Got NULL skb\n", __FUNCTION__ );
		return 0;
	}	

	param_len = strlen(param);
	switch (type) {
	case IRLAN_BYTE:
		value_len = 1;
		break;
	case IRLAN_SHORT:
		value_len = 2;
		break;
	case IRLAN_ARRAY:
		IRDA_ASSERT(value_array != NULL, return 0;);
		IRDA_ASSERT(value_len > 0, return 0;);
		break;
	default:
		IRDA_DEBUG(2, "%s(), Unknown parameter type!\n", __FUNCTION__ );
		return 0;
		break;
	}
	
	/* Insert at end of sk-buffer */
	frame = skb->tail;

	/* Make space for data */
	if (skb_tailroom(skb) < (param_len+value_len+3)) {
		IRDA_DEBUG(2, "%s(), No more space at end of skb\n", __FUNCTION__ );
		return 0;
	}	
	skb_put(skb, param_len+value_len+3);
	
	/* Insert parameter length */
	frame[n++] = param_len;
	
	/* Insert parameter */
	memcpy(frame+n, param, param_len); n += param_len;
	
	/* Insert value length (2 byte little endian format, LSB first) */
	tmp_le = cpu_to_le16(value_len);
	memcpy(frame+n, &tmp_le, 2); n += 2; /* To avoid alignment problems */

	/* Insert value */
	switch (type) {
	case IRLAN_BYTE:
		frame[n++] = value_byte;
		break;
	case IRLAN_SHORT:
		tmp_le = cpu_to_le16(value_short);
		memcpy(frame+n, &tmp_le, 2); n += 2;
		break;
	case IRLAN_ARRAY:
		memcpy(frame+n, value_array, value_len); n+=value_len;
		break;
	default:
		break;
	}
	IRDA_ASSERT(n == (param_len+value_len+3), return 0;);

	return param_len+value_len+3;
}

/*
 * Function irlan_extract_param (buf, name, value, len)
 *
 *    Extracts a single parameter name/value pair from buffer and updates
 *    the buffer pointer to point to the next name/value pair. 
 */
int irlan_extract_param(__u8 *buf, char *name, char *value, __u16 *len)
{
	__u8 name_len;
	__u16 val_len;
	int n=0;
	
	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
	
	/* get length of parameter name (1 byte) */
	name_len = buf[n++];
	
	if (name_len > 254) {
		IRDA_DEBUG(2, "%s(), name_len > 254\n", __FUNCTION__ );
		return -RSP_INVALID_COMMAND_FORMAT;
	}
	
	/* get parameter name */
	memcpy(name, buf+n, name_len);
	name[name_len] = '\0';
	n+=name_len;
	
	/*  
	 *  Get length of parameter value (2 bytes in little endian 
	 *  format) 
	 */
	memcpy(&val_len, buf+n, 2); /* To avoid alignment problems */
	le16_to_cpus(&val_len); n+=2;
	
	if (val_len > 1016) {
		IRDA_DEBUG(2, "%s(), parameter length to long\n", __FUNCTION__ );
		return -RSP_INVALID_COMMAND_FORMAT;
	}
	*len = val_len;

	/* get parameter value */
	memcpy(value, buf+n, val_len);
	value[val_len] = '\0';
	n+=val_len;
	
	IRDA_DEBUG(4, "Parameter: %s ", name); 
	IRDA_DEBUG(4, "Value: %s\n", value); 

	return n;
}

#ifdef CONFIG_PROC_FS

/*
 * Start of reading /proc entries.
 * Return entry at pos, 
 *	or start_token to indicate print header line
 *	or NULL if end of file
 */
static void *irlan_seq_start(struct seq_file *seq, loff_t *pos)
{
	int i = 1;
	struct irlan_cb *self;

	rcu_read_lock();
	if (*pos == 0)
		return SEQ_START_TOKEN;

	list_for_each_entry(self, &irlans, dev_list) {
		if (*pos == i) 
			return self;
		++i;
	}
	return NULL;
}

/* Return entry after v, and increment pos */
static void *irlan_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	struct list_head *nxt;

	++*pos;
	if (v == SEQ_START_TOKEN) 
		nxt = irlans.next;
	else
		nxt = ((struct irlan_cb *)v)->dev_list.next;

	return (nxt == &irlans) ? NULL 
		: list_entry(nxt, struct irlan_cb, dev_list);
}

/* End of reading /proc file */
static void irlan_seq_stop(struct seq_file *seq, void *v)
{
	rcu_read_unlock();
}


/*
 * Show one entry in /proc file.
 */
static int irlan_seq_show(struct seq_file *seq, void *v)
{
	if (v == SEQ_START_TOKEN)
		seq_puts(seq, "IrLAN instances:\n");
	else {
		struct irlan_cb *self = v;
		
		IRDA_ASSERT(self != NULL, return -1;);
		IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -1;);

		seq_printf(seq,"ifname: %s,\n",
			       self->dev->name);
		seq_printf(seq,"client state: %s, ",
			       irlan_state[ self->client.state]);
		seq_printf(seq,"provider state: %s,\n",
			       irlan_state[ self->provider.state]);
		seq_printf(seq,"saddr: %#08x, ",
			       self->saddr);
		seq_printf(seq,"daddr: %#08x\n",
			       self->daddr);
		seq_printf(seq,"version: %d.%d,\n",
			       self->version[1], self->version[0]);
		seq_printf(seq,"access type: %s\n", 
			       irlan_access[self->client.access_type]);
		seq_printf(seq,"media: %s\n", 
			       irlan_media[self->media]);
		
		seq_printf(seq,"local filter:\n");
		seq_printf(seq,"remote filter: ");
		irlan_print_filter(seq, self->client.filter_type);
		seq_printf(seq,"tx busy: %s\n", 
			       netif_queue_stopped(self->dev) ? "TRUE" : "FALSE");
			
		seq_putc(seq,'\n');
	}
	return 0;
}

static struct seq_operations irlan_seq_ops = {
	.start = irlan_seq_start,
	.next  = irlan_seq_next,
	.stop  = irlan_seq_stop,
	.show  = irlan_seq_show,
};

static int irlan_seq_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &irlan_seq_ops);
}
#endif

MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
MODULE_DESCRIPTION("The Linux IrDA LAN protocol"); 
MODULE_LICENSE("GPL");

module_param(eth, bool, 0);
MODULE_PARM_DESC(eth, "Name devices ethX (0) or irlanX (1)");
module_param(access, int, 0);
MODULE_PARM_DESC(access, "Access type DIRECT=1, PEER=2, HOSTED=3");

module_init(irlan_init);
module_exit(irlan_cleanup);