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
|
/*********************************************************************
*
* Filename: iriap_event.c
* Version: 0.1
* Description: IAP Finite State Machine
* Status: Experimental.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Thu Aug 21 00:02:07 1997
* Modified at: Wed Mar 1 11:28:34 2000
* Modified by: Dag Brattli <dagb@cs.uit.no>
*
* Copyright (c) 1997, 1999-2000 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 <net/irda/irda.h>
#include <net/irda/irlmp.h>
#include <net/irda/iriap.h>
#include <net/irda/iriap_event.h>
static void state_s_disconnect (struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb);
static void state_s_connecting (struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb);
static void state_s_call (struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb);
static void state_s_make_call (struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb);
static void state_s_calling (struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb);
static void state_s_outstanding (struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb);
static void state_s_replying (struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb);
static void state_s_wait_for_call(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb);
static void state_s_wait_active (struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb);
static void state_r_disconnect (struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb);
static void state_r_call (struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb);
static void state_r_waiting (struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb);
static void state_r_wait_active (struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb);
static void state_r_receiving (struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb);
static void state_r_execute (struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb);
static void state_r_returning (struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb);
static void (*iriap_state[])(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb) = {
/* Client FSM */
state_s_disconnect,
state_s_connecting,
state_s_call,
/* S-Call FSM */
state_s_make_call,
state_s_calling,
state_s_outstanding,
state_s_replying,
state_s_wait_for_call,
state_s_wait_active,
/* Server FSM */
state_r_disconnect,
state_r_call,
/* R-Connect FSM */
state_r_waiting,
state_r_wait_active,
state_r_receiving,
state_r_execute,
state_r_returning,
};
void iriap_next_client_state(struct iriap_cb *self, IRIAP_STATE state)
{
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
self->client_state = state;
}
void iriap_next_call_state(struct iriap_cb *self, IRIAP_STATE state)
{
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
self->call_state = state;
}
void iriap_next_server_state(struct iriap_cb *self, IRIAP_STATE state)
{
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
self->server_state = state;
}
void iriap_next_r_connect_state(struct iriap_cb *self, IRIAP_STATE state)
{
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
self->r_connect_state = state;
}
void iriap_do_client_event(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
(*iriap_state[ self->client_state]) (self, event, skb);
}
void iriap_do_call_event(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
(*iriap_state[ self->call_state]) (self, event, skb);
}
void iriap_do_server_event(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
(*iriap_state[ self->server_state]) (self, event, skb);
}
void iriap_do_r_connect_event(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
(*iriap_state[ self->r_connect_state]) (self, event, skb);
}
/*
* Function state_s_disconnect (event, skb)
*
* S-Disconnect, The device has no LSAP connection to a particular
* remote device.
*/
static void state_s_disconnect(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
switch (event) {
case IAP_CALL_REQUEST_GVBC:
iriap_next_client_state(self, S_CONNECTING);
IRDA_ASSERT(self->request_skb == NULL, return;);
/* Don't forget to refcount it -
* see iriap_getvaluebyclass_request(). */
skb_get(skb);
self->request_skb = skb;
iriap_connect_request(self);
break;
case IAP_LM_DISCONNECT_INDICATION:
break;
default:
IRDA_DEBUG(0, "%s(), Unknown event %d\n", __FUNCTION__, event);
break;
}
}
/*
* Function state_s_connecting (self, event, skb)
*
* S-Connecting
*
*/
static void state_s_connecting(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
switch (event) {
case IAP_LM_CONNECT_CONFIRM:
/*
* Jump to S-Call FSM
*/
iriap_do_call_event(self, IAP_CALL_REQUEST, skb);
/* iriap_call_request(self, 0,0,0); */
iriap_next_client_state(self, S_CALL);
break;
case IAP_LM_DISCONNECT_INDICATION:
/* Abort calls */
iriap_next_call_state(self, S_MAKE_CALL);
iriap_next_client_state(self, S_DISCONNECT);
break;
default:
IRDA_DEBUG(0, "%s(), Unknown event %d\n", __FUNCTION__, event);
break;
}
}
/*
* Function state_s_call (self, event, skb)
*
* S-Call, The device can process calls to a specific remote
* device. Whenever the LSAP connection is disconnected, this state
* catches that event and clears up
*/
static void state_s_call(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
IRDA_ASSERT(self != NULL, return;);
switch (event) {
case IAP_LM_DISCONNECT_INDICATION:
/* Abort calls */
iriap_next_call_state(self, S_MAKE_CALL);
iriap_next_client_state(self, S_DISCONNECT);
break;
default:
IRDA_DEBUG(0, "state_s_call: Unknown event %d\n", event);
break;
}
}
/*
* Function state_s_make_call (event, skb)
*
* S-Make-Call
*
*/
static void state_s_make_call(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
struct sk_buff *tx_skb;
IRDA_ASSERT(self != NULL, return;);
switch (event) {
case IAP_CALL_REQUEST:
/* Already refcounted - see state_s_disconnect() */
tx_skb = self->request_skb;
self->request_skb = NULL;
irlmp_data_request(self->lsap, tx_skb);
iriap_next_call_state(self, S_OUTSTANDING);
break;
default:
IRDA_DEBUG(0, "%s(), Unknown event %d\n", __FUNCTION__, event);
break;
}
}
/*
* Function state_s_calling (event, skb)
*
* S-Calling
*
*/
static void state_s_calling(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
IRDA_DEBUG(0, "%s(), Not implemented\n", __FUNCTION__);
}
/*
* Function state_s_outstanding (event, skb)
*
* S-Outstanding, The device is waiting for a response to a command
*
*/
static void state_s_outstanding(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
IRDA_ASSERT(self != NULL, return;);
switch (event) {
case IAP_RECV_F_LST:
/*iriap_send_ack(self);*/
/*LM_Idle_request(idle); */
iriap_next_call_state(self, S_WAIT_FOR_CALL);
break;
default:
IRDA_DEBUG(0, "%s(), Unknown event %d\n", __FUNCTION__, event);
break;
}
}
/*
* Function state_s_replying (event, skb)
*
* S-Replying, The device is collecting a multiple part response
*/
static void state_s_replying(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
IRDA_DEBUG(0, "%s(), Not implemented\n", __FUNCTION__);
}
/*
* Function state_s_wait_for_call (event, skb)
*
* S-Wait-for-Call
*
*/
static void state_s_wait_for_call(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
IRDA_DEBUG(0, "%s(), Not implemented\n", __FUNCTION__);
}
/*
* Function state_s_wait_active (event, skb)
*
* S-Wait-Active
*
*/
static void state_s_wait_active(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
IRDA_DEBUG(0, "%s(), Not implemented\n", __FUNCTION__);
}
/**************************************************************************
*
* Server FSM
*
**************************************************************************/
/*
* Function state_r_disconnect (self, event, skb)
*
* LM-IAS server is disconnected (not processing any requests!)
*
*/
static void state_r_disconnect(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
struct sk_buff *tx_skb;
switch (event) {
case IAP_LM_CONNECT_INDICATION:
tx_skb = alloc_skb(64, GFP_ATOMIC);
if (tx_skb == NULL) {
IRDA_WARNING("%s: unable to malloc!\n", __FUNCTION__);
return;
}
/* Reserve space for MUX_CONTROL and LAP header */
skb_reserve(tx_skb, LMP_MAX_HEADER);
irlmp_connect_response(self->lsap, tx_skb);
/*LM_Idle_request(idle); */
iriap_next_server_state(self, R_CALL);
/*
* Jump to R-Connect FSM, we skip R-Waiting since we do not
* care about LM_Idle_request()!
*/
iriap_next_r_connect_state(self, R_RECEIVING);
break;
default:
IRDA_DEBUG(0, "%s(), unknown event %d\n", __FUNCTION__, event);
break;
}
}
/*
* Function state_r_call (self, event, skb)
*/
static void state_r_call(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
switch (event) {
case IAP_LM_DISCONNECT_INDICATION:
/* Abort call */
iriap_next_server_state(self, R_DISCONNECT);
iriap_next_r_connect_state(self, R_WAITING);
break;
default:
IRDA_DEBUG(0, "%s(), unknown event!\n", __FUNCTION__);
break;
}
}
/*
* R-Connect FSM
*/
/*
* Function state_r_waiting (self, event, skb)
*/
static void state_r_waiting(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
IRDA_DEBUG(0, "%s(), Not implemented\n", __FUNCTION__);
}
static void state_r_wait_active(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
IRDA_DEBUG(0, "%s(), Not implemented\n", __FUNCTION__);
}
/*
* Function state_r_receiving (self, event, skb)
*
* We are receiving a command
*
*/
static void state_r_receiving(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
switch (event) {
case IAP_RECV_F_LST:
iriap_next_r_connect_state(self, R_EXECUTE);
iriap_call_indication(self, skb);
break;
default:
IRDA_DEBUG(0, "%s(), unknown event!\n", __FUNCTION__);
break;
}
}
/*
* Function state_r_execute (self, event, skb)
*
* The server is processing the request
*
*/
static void state_r_execute(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
IRDA_ASSERT(skb != NULL, return;);
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
switch (event) {
case IAP_CALL_RESPONSE:
/*
* Since we don't implement the Waiting state, we return
* to state Receiving instead, DB.
*/
iriap_next_r_connect_state(self, R_RECEIVING);
/* Don't forget to refcount it - see
* iriap_getvaluebyclass_response(). */
skb_get(skb);
irlmp_data_request(self->lsap, skb);
break;
default:
IRDA_DEBUG(0, "%s(), unknown event!\n", __FUNCTION__);
break;
}
}
static void state_r_returning(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
IRDA_DEBUG(0, "%s(), event=%d\n", __FUNCTION__, event);
switch (event) {
case IAP_RECV_F_LST:
break;
default:
break;
}
}
|
