aboutsummaryrefslogtreecommitdiff
path: root/net/irda/irlan/irlan_client.c
blob: f8e6cb0db04bc79712e17f406af1bf8e40bcaadc (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
/*********************************************************************
 *                
 * Filename:      irlan_client.c
 * Version:       0.9
 * Description:   IrDA LAN Access Protocol (IrLAN) Client
 * Status:        Experimental.
 * Author:        Dag Brattli <dagb@cs.uit.no>
 * Created at:    Sun Aug 31 20:14:37 1997
 * Modified at:   Tue Dec 14 15:47:02 1999
 * Modified by:   Dag Brattli <dagb@cs.uit.no>
 * Sources:       skeleton.c by Donald Becker <becker@CESDIS.gsfc.nasa.gov>
 *                slip.c by Laurence Culhane, <loz@holmes.demon.co.uk>
 *                          Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
 * 
 *     Copyright (c) 1998-1999 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/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/bitops.h>
#include <net/arp.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/irias_object.h>
#include <net/irda/iriap.h>
#include <net/irda/timer.h>

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

#undef CONFIG_IRLAN_GRATUITOUS_ARP

static void irlan_client_ctrl_disconnect_indication(void *instance, void *sap, 
						    LM_REASON reason, 
						    struct sk_buff *);
static int irlan_client_ctrl_data_indication(void *instance, void *sap, 
					     struct sk_buff *skb);
static void irlan_client_ctrl_connect_confirm(void *instance, void *sap, 
					      struct qos_info *qos, 
					      __u32 max_sdu_size,
					      __u8 max_header_size,
					      struct sk_buff *);
static void irlan_check_response_param(struct irlan_cb *self, char *param, 
				       char *value, int val_len);
static void irlan_client_open_ctrl_tsap(struct irlan_cb *self);

static void irlan_client_kick_timer_expired(void *data)
{
	struct irlan_cb *self = (struct irlan_cb *) data;
	
	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
	
	/*  
	 * If we are in peer mode, the client may not have got the discovery
	 * indication it needs to make progress. If the client is still in 
	 * IDLE state, we must kick it to, but only if the provider is not IDLE
 	 */
	if ((self->provider.access_type == ACCESS_PEER) && 
	    (self->client.state == IRLAN_IDLE) &&
	    (self->provider.state != IRLAN_IDLE)) {
		irlan_client_wakeup(self, self->saddr, self->daddr);
	}
}

static void irlan_client_start_kick_timer(struct irlan_cb *self, int timeout)
{
	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
	
	irda_start_timer(&self->client.kick_timer, timeout, (void *) self, 
			 irlan_client_kick_timer_expired);
}

/*
 * Function irlan_client_wakeup (self, saddr, daddr)
 *
 *    Wake up client
 *
 */
void irlan_client_wakeup(struct irlan_cb *self, __u32 saddr, __u32 daddr)
{
	IRDA_DEBUG(1, "%s()\n", __FUNCTION__ );

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

	/* 
	 * Check if we are already awake, or if we are a provider in direct
	 * mode (in that case we must leave the client idle
	 */
	if ((self->client.state != IRLAN_IDLE) || 
	    (self->provider.access_type == ACCESS_DIRECT))
	{
			IRDA_DEBUG(0, "%s(), already awake!\n", __FUNCTION__ );
			return;
	}

	/* Addresses may have changed! */
	self->saddr = saddr;
	self->daddr = daddr;

	if (self->disconnect_reason == LM_USER_REQUEST) {
			IRDA_DEBUG(0, "%s(), still stopped by user\n", __FUNCTION__ );
			return;
	}

	/* Open TSAPs */
	irlan_client_open_ctrl_tsap(self);
	irlan_open_data_tsap(self);

	irlan_do_client_event(self, IRLAN_DISCOVERY_INDICATION, NULL);
	
	/* Start kick timer */
	irlan_client_start_kick_timer(self, 2*HZ);
}

/*
 * Function irlan_discovery_indication (daddr)
 *
 *    Remote device with IrLAN server support discovered
 *
 */
void irlan_client_discovery_indication(discinfo_t *discovery,
				       DISCOVERY_MODE mode,
				       void *priv) 
{
	struct irlan_cb *self;
	__u32 saddr, daddr;
	
	IRDA_DEBUG(1, "%s()\n", __FUNCTION__ );

	IRDA_ASSERT(discovery != NULL, return;);

	/*
	 * I didn't check it, but I bet that IrLAN suffer from the same
	 * deficiency as IrComm and doesn't handle two instances
	 * simultaneously connecting to each other.
	 * Same workaround, drop passive discoveries.
	 * Jean II */
	if(mode == DISCOVERY_PASSIVE)
		return;

	saddr = discovery->saddr;
	daddr = discovery->daddr;

	/* Find instance */
	rcu_read_lock();
	self = irlan_get_any();
	if (self) {
		IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);

		IRDA_DEBUG(1, "%s(), Found instance (%08x)!\n", __FUNCTION__ ,
		      daddr);
		
		irlan_client_wakeup(self, saddr, daddr);
	}
	rcu_read_unlock();
}
	
/*
 * Function irlan_client_data_indication (handle, skb)
 *
 *    This function gets the data that is received on the control channel
 *
 */
static int irlan_client_ctrl_data_indication(void *instance, void *sap, 
					     struct sk_buff *skb)
{
	struct irlan_cb *self;
	
	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
	
	self = (struct irlan_cb *) instance;
	
	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -1;);
	IRDA_ASSERT(skb != NULL, return -1;);
	
	irlan_do_client_event(self, IRLAN_DATA_INDICATION, skb); 

	/* Ready for a new command */	
	IRDA_DEBUG(2, "%s(), clearing tx_busy\n", __FUNCTION__ );
	self->client.tx_busy = FALSE;

	/* Check if we have some queued commands waiting to be sent */
	irlan_run_ctrl_tx_queue(self);

	return 0;
}

static void irlan_client_ctrl_disconnect_indication(void *instance, void *sap, 
						    LM_REASON reason, 
						    struct sk_buff *userdata) 
{
	struct irlan_cb *self;
	struct tsap_cb *tsap;
	struct sk_buff *skb;

	IRDA_DEBUG(4, "%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->client.tsap_ctrl, return;);

       	/* Remove frames queued on the control channel */
	while ((skb = skb_dequeue(&self->client.txq)) != NULL) {
		dev_kfree_skb(skb);
	}
	self->client.tx_busy = FALSE;

	irlan_do_client_event(self, IRLAN_LMP_DISCONNECT, NULL);
}

/*
 * Function irlan_client_open_tsaps (self)
 *
 *    Initialize callbacks and open IrTTP TSAPs
 *
 */
static void irlan_client_open_ctrl_tsap(struct irlan_cb *self)
{
	struct tsap_cb *tsap;
	notify_t notify;

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

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

	/* Check if already open */
	if (self->client.tsap_ctrl)
		return;

	irda_notify_init(&notify);

	/* Set up callbacks */
	notify.data_indication       = irlan_client_ctrl_data_indication;
	notify.connect_confirm       = irlan_client_ctrl_connect_confirm;
	notify.disconnect_indication = irlan_client_ctrl_disconnect_indication;
	notify.instance = self;
	strlcpy(notify.name, "IrLAN ctrl (c)", 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->client.tsap_ctrl = tsap;
}

/*
 * Function irlan_client_connect_confirm (handle, skb)
 *
 *    Connection to peer IrLAN laye confirmed
 *
 */
static void irlan_client_ctrl_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;

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

	self = (struct irlan_cb *) instance;

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

	self->client.max_sdu_size = max_sdu_size;
	self->client.max_header_size = max_header_size;

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

	irlan_do_client_event(self, IRLAN_CONNECT_COMPLETE, NULL);
}

/*
 * Function print_ret_code (code)
 *
 *    Print return code of request to peer IrLAN layer.
 *
 */
static void print_ret_code(__u8 code) 
{
	switch(code) {
	case 0:
		printk(KERN_INFO "Success\n");
		break;
	case 1:
		IRDA_WARNING("IrLAN: Insufficient resources\n");
		break;
	case 2:
		IRDA_WARNING("IrLAN: Invalid command format\n");
		break;
	case 3:
		IRDA_WARNING("IrLAN: Command not supported\n");
		break;
	case 4:
		IRDA_WARNING("IrLAN: Parameter not supported\n");
		break;
	case 5:
		IRDA_WARNING("IrLAN: Value not supported\n");
		break;
	case 6:
		IRDA_WARNING("IrLAN: Not open\n");
		break;
	case 7:
		IRDA_WARNING("IrLAN: Authentication required\n");
		break;
	case 8:
		IRDA_WARNING("IrLAN: Invalid password\n");
		break;
	case 9:
		IRDA_WARNING("IrLAN: Protocol error\n");
		break;
	case 255:
		IRDA_WARNING("IrLAN: Asynchronous status\n");
		break;
	}
}

/*
 * Function irlan_client_parse_response (self, skb)
 *
 *    Extract all parameters from received buffer, then feed them to 
 *    check_params for parsing
 */
void irlan_client_parse_response(struct irlan_cb *self, struct sk_buff *skb)
{
	__u8 *frame;
	__u8 *ptr;
	int count;
	int ret;
	__u16 val_len;
	int i;
        char *name;
        char *value;

	IRDA_ASSERT(skb != NULL, return;);	
	
	IRDA_DEBUG(4, "%s() skb->len=%d\n", __FUNCTION__ , (int) skb->len);
	
	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
	
	if (!skb) {
		IRDA_ERROR("%s(), Got NULL skb!\n", __FUNCTION__);
		return;
	}
	frame = skb->data;
	
	/* 
	 *  Check return code and print it if not success 
	 */
	if (frame[0]) {
		print_ret_code(frame[0]);
		return;
	}
	
	name = kmalloc(255, GFP_ATOMIC);
	if (!name)
		return;
	value = kmalloc(1016, GFP_ATOMIC);
	if (!value) {
		kfree(name);
		return;
	}

	/* How many parameters? */
	count = frame[1];

	IRDA_DEBUG(4, "%s(), got %d parameters\n", __FUNCTION__ , count);
	
	ptr = frame+2;

	/* For all parameters */
 	for (i=0; i<count;i++) {
		ret = irlan_extract_param(ptr, name, value, &val_len);
		if (ret < 0) {
			IRDA_DEBUG(2, "%s(), IrLAN, Error!\n", __FUNCTION__ );
			break;
		}
		ptr += ret;
		irlan_check_response_param(self, name, value, val_len);
 	}
	/* Cleanup */
	kfree(name);
	kfree(value);
}

/*
 * Function irlan_check_response_param (self, param, value, val_len)
 *
 *     Check which parameter is received and update local variables
 *
 */
static void irlan_check_response_param(struct irlan_cb *self, char *param, 
				       char *value, int val_len) 
{
	__u16 tmp_cpu; /* Temporary value in host order */
	__u8 *bytes;
	int i;

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

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

	/* Media type */
	if (strcmp(param, "MEDIA") == 0) {
		if (strcmp(value, "802.3") == 0)
			self->media = MEDIA_802_3;
		else
			self->media = MEDIA_802_5;
		return;
	}
	if (strcmp(param, "FILTER_TYPE") == 0) {
		if (strcmp(value, "DIRECTED") == 0)
			self->client.filter_type |= IRLAN_DIRECTED;
		else if (strcmp(value, "FUNCTIONAL") == 0)
			self->client.filter_type |= IRLAN_FUNCTIONAL;
		else if (strcmp(value, "GROUP") == 0)
			self->client.filter_type |= IRLAN_GROUP;
		else if (strcmp(value, "MAC_FRAME") == 0)
			self->client.filter_type |= IRLAN_MAC_FRAME;
		else if (strcmp(value, "MULTICAST") == 0)
			self->client.filter_type |= IRLAN_MULTICAST;
		else if (strcmp(value, "BROADCAST") == 0)
			self->client.filter_type |= IRLAN_BROADCAST;
		else if (strcmp(value, "IPX_SOCKET") == 0)
			self->client.filter_type |= IRLAN_IPX_SOCKET;
		
	}
	if (strcmp(param, "ACCESS_TYPE") == 0) {
		if (strcmp(value, "DIRECT") == 0)
			self->client.access_type = ACCESS_DIRECT;
		else if (strcmp(value, "PEER") == 0)
			self->client.access_type = ACCESS_PEER;
		else if (strcmp(value, "HOSTED") == 0)
			self->client.access_type = ACCESS_HOSTED;
		else {
			IRDA_DEBUG(2, "%s(), unknown access type!\n", __FUNCTION__ );
		}
	}
	/* IRLAN version */
	if (strcmp(param, "IRLAN_VER") == 0) {
		IRDA_DEBUG(4, "IrLAN version %d.%d\n", (__u8) value[0], 
		      (__u8) value[1]);

		self->version[0] = value[0];
		self->version[1] = value[1];
		return;
	}
	/* Which remote TSAP to use for data channel */
	if (strcmp(param, "DATA_CHAN") == 0) {
		self->dtsap_sel_data = value[0];
		IRDA_DEBUG(4, "Data TSAP = %02x\n", self->dtsap_sel_data);
		return;
	}
	if (strcmp(param, "CON_ARB") == 0) {
		memcpy(&tmp_cpu, value, 2); /* Align value */
		le16_to_cpus(&tmp_cpu);     /* Convert to host order */
		self->client.recv_arb_val = tmp_cpu;
		IRDA_DEBUG(2, "%s(), receive arb val=%d\n", __FUNCTION__ , 
			   self->client.recv_arb_val);
	}
	if (strcmp(param, "MAX_FRAME") == 0) {
		memcpy(&tmp_cpu, value, 2); /* Align value */
		le16_to_cpus(&tmp_cpu);     /* Convert to host order */
		self->client.max_frame = tmp_cpu;
		IRDA_DEBUG(4, "%s(), max frame=%d\n", __FUNCTION__ , 
			   self->client.max_frame);
	}
	 
	/* RECONNECT_KEY, in case the link goes down! */
	if (strcmp(param, "RECONNECT_KEY") == 0) {
		IRDA_DEBUG(4, "Got reconnect key: ");
		/* for (i = 0; i < val_len; i++) */
/* 			printk("%02x", value[i]); */
		memcpy(self->client.reconnect_key, value, val_len);
		self->client.key_len = val_len;
		IRDA_DEBUG(4, "\n");
	}
	/* FILTER_ENTRY, have we got an ethernet address? */
	if (strcmp(param, "FILTER_ENTRY") == 0) {
		bytes = value;
		IRDA_DEBUG(4, "Ethernet address = %02x:%02x:%02x:%02x:%02x:%02x\n",
		      bytes[0], bytes[1], bytes[2], bytes[3], bytes[4], 
		      bytes[5]);
		for (i = 0; i < 6; i++) 
			self->dev->dev_addr[i] = bytes[i];
	}
}

/*
 * Function irlan_client_get_value_confirm (obj_id, value)
 *
 *    Got results from remote LM-IAS
 *
 */
void irlan_client_get_value_confirm(int result, __u16 obj_id, 
				    struct ias_value *value, void *priv) 
{
	struct irlan_cb *self;
	
	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );

	IRDA_ASSERT(priv != NULL, return;);

	self = (struct irlan_cb *) priv;
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);

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

	/* Check if request succeeded */
	if (result != IAS_SUCCESS) {
		IRDA_DEBUG(2, "%s(), got NULL value!\n", __FUNCTION__ );
		irlan_do_client_event(self, IRLAN_IAS_PROVIDER_NOT_AVAIL, 
				      NULL);
		return;
	}

	switch (value->type) {
	case IAS_INTEGER:
		self->dtsap_sel_ctrl = value->t.integer;

		if (value->t.integer != -1) {
			irlan_do_client_event(self, IRLAN_IAS_PROVIDER_AVAIL,
					      NULL);
			return;
		}
		irias_delete_value(value);
		break;
	default:
		IRDA_DEBUG(2, "%s(), unknown type!\n", __FUNCTION__ );
		break;
	}
	irlan_do_client_event(self, IRLAN_IAS_PROVIDER_NOT_AVAIL, NULL);
}