summaryrefslogtreecommitdiff
path: root/plugins/iwmx.c
blob: c936706ac85c99f227d121c2d3d8139e52b89f2b (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
/*
 *
 *  Connection Manager
 *
 *  Copyright (C) 2007-2012  Intel Corporation. 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 version 2 as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <errno.h>
#include <string.h>

#include <glib.h>

#define CONNMAN_API_SUBJECT_TO_CHANGE
#include <connman/plugin.h>
#include <connman/device.h>
#include <connman/inet.h>
#include <connman/log.h>

#include <WiMaxAPI.h>
#include <WiMaxAPIEx.h>

#include "iwmx.h"

/*
 * Connman plugin interface
 *
 * This part deals with the connman internals
 */

/* WiMAX network driver probe/remove, nops */
static int iwmx_cm_network_probe(struct connman_network *nw)
{
	return 0;
}

static void iwmx_cm_network_remove(struct connman_network *nw)
{
}

/*
 * Called by connman when it wants us to tell the device to connect to
 * the network @network_el; the device is @network_el->parent.
 *
 * We do a synchronous call to start the connection; the logic
 * attached to the status change callback will update the connman
 * internals once the change happens.
 */
static int iwmx_cm_network_connect(struct connman_network *nw)
{
	int result;
	struct wmxsdk *wmxsdk;
	const char *station_name = connman_network_get_identifier(nw);

	wmxsdk = connman_device_get_data(connman_network_get_device(nw));
	result = iwmx_sdk_connect(wmxsdk, nw);
	DBG("(nw %p [%s] wmxsdk %p) = %d\n", nw, station_name, wmxsdk, result);
	return result;
}

/*
 * Called by connman to have the device @nw->parent
 * disconnected from @nw.
 *
 * We do a synchronous call to start the disconnection; the logic
 * attached to the status change callback will update the connman
 * internals once the change happens.
 */
static int iwmx_cm_network_disconnect(struct connman_network *nw)
{
	int result;
	struct wmxsdk *wmxsdk;
	const char *station_name = connman_network_get_identifier(nw);

	wmxsdk = connman_device_get_data(connman_network_get_device(nw));
	result = iwmx_sdk_disconnect(wmxsdk);
	DBG("(nw %p [%s] wmxsdk %p) = %d\n", nw, station_name, wmxsdk, result);
	return 0;
}

/*
 * "Driver" for the networks detected by a device.
 */
static struct connman_network_driver iwmx_cm_network_driver = {
	.name		= "iwmx",
	.type		= CONNMAN_NETWORK_TYPE_WIMAX,
	.probe		= iwmx_cm_network_probe,
	.remove		= iwmx_cm_network_remove,
	.connect	= iwmx_cm_network_connect,
	.disconnect	= iwmx_cm_network_disconnect,
};

/*
 * A (maybe) new network is available, create/update its data
 *
 * If the network is new, we create and register a new element; if it
 * is not, we reuse the one in the list.
 *
 * NOTE:
 *   wmxsdk->network_mutex has to be locked
 */
struct connman_network *__iwmx_cm_network_available(
			struct wmxsdk *wmxsdk, const char *station_name,
			const void *sdk_nspname, size_t sdk_nspname_size,
								int strength)
{
	struct connman_network *nw = NULL;
	struct connman_device *dev = wmxsdk->dev;
	char group[3 * strlen(station_name) + 1];
	unsigned cnt;

	nw = connman_device_get_network(dev, station_name);
	if (nw == NULL) {
		DBG("new network %s", station_name);
		nw = connman_network_create(station_name,
					    CONNMAN_NETWORK_TYPE_WIMAX);
		connman_network_register(nw);
		connman_network_set_index(nw, connman_device_get_index(dev));
		connman_network_set_name(nw, station_name);
		connman_network_set_blob(nw, "WiMAX.NSP.name",
					 sdk_nspname, sdk_nspname_size);
		/* FIXME: add roaming info? */
		/* Set the group name -- this has to be a unique
		 * [a-zA-Z0-9_] string common to all the networks that
		 * are actually the same provider. In WiMAX each
		 * network from the CAPI is a single provider, so we
		 * just set this as the network name, encoded in
		 * hex. */
		for (cnt = 0; station_name[cnt] != 0; cnt++)
			sprintf(group + 3 * cnt, "%02x", station_name[cnt]);
		group[3 * cnt + 1] = 0;
		connman_network_set_group(nw, station_name);
		if (connman_device_add_network(dev, nw) < 0) {
			connman_network_unregister(nw);
			connman_network_unref(nw);
			goto error_add;
		}
	} else
		DBG("updating network %s nw %p\n", station_name, nw);
	connman_network_set_available(nw, TRUE);
	connman_network_set_strength(nw, strength);
error_add:
	return nw;
}

/*
 * A new network is available [locking version]
 *
 * See __iwmx_cm_network_available() for docs
 */
struct connman_network *iwmx_cm_network_available(
			struct wmxsdk *wmxsdk, const char *station_name,
			const void *sdk_nspname, size_t sdk_nspname_size,
								int strength)
{
	struct connman_network *nw;

	g_static_mutex_lock(&wmxsdk->network_mutex);
	nw = __iwmx_cm_network_available(wmxsdk, station_name,
					sdk_nspname, sdk_nspname_size,
					strength);
	g_static_mutex_unlock(&wmxsdk->network_mutex);
	return nw;
}

/*
 * The device has been enabled, make sure connman knows
 */
static void iwmx_cm_dev_enabled(struct wmxsdk *wmxsdk)
{
	struct connman_device *dev = wmxsdk->dev;
	connman_inet_ifup(connman_device_get_index(dev));
	connman_device_set_powered(dev, TRUE);
}

/*
 * The device has been disabled, make sure connman is aware of it.
 */
static void iwmx_cm_dev_disabled(struct wmxsdk *wmxsdk)
{
	struct connman_device *dev = wmxsdk->dev;
	connman_inet_ifdown(connman_device_get_index(dev));
	connman_device_set_powered(dev, FALSE);
}

/*
 * The device has been (externally to connman) connnected to a
 * network, make sure connman knows.
 *
 * When the device is connected to a network, this function is called
 * to change connman's internal state to reflect the fact.
 *
 * If the change came from an external entity, that means that our
 * connect code wasn't called. Our connect code sets
 * @wmxsdk->connecting_nw to the network we were connecting
 * to. If it is unset, it means an external entity forced the device
 * to connect. In that case, we need to find out which network it was
 * connected to, and create/lookup a @nw for it.
 *
 * Once the nw is set, then we are done.
 */
static void iwmx_cm_dev_connected(struct wmxsdk *wmxsdk)
{
	struct connman_network *nw;

	g_mutex_lock(wmxsdk->connect_mutex);
	nw = wmxsdk->connecting_nw;
	if (nw == NULL) {
		nw = __iwmx_sdk_get_connected_network(wmxsdk);
		if (nw == NULL) {
			connman_error("wmxsdk: can't find connected network\n");
			goto error_nw_find;
		}
	}
	wmxsdk->nw = connman_network_ref(nw);
	wmxsdk->connecting_nw = NULL;
	connman_network_set_ipv4_method(nw, CONNMAN_IPCONFIG_METHOD_DHCP);
	connman_network_set_connected(nw, TRUE);
	DBG("connected to network %s\n",
	    connman_network_get_identifier(nw));
error_nw_find:
	g_mutex_unlock(wmxsdk->connect_mutex);
}

/*
 * The device has been (externally to connman) disconnnected, make
 * sure connman knows
 *
 * We need to reverse the steps done in iwmx_cm_dev_connected().
 * If the event was caused by an external entity and we had no record
 * of being connected to a network...well, bad luck. We'll just
 * pretend it happened ok.
 */
static void __iwmx_cm_dev_disconnected(struct wmxsdk *wmxsdk)
{
	struct connman_network *nw = wmxsdk->nw;

	if (nw != NULL) {
		DBG("disconnected from network %s\n",
					connman_network_get_identifier(nw));
		connman_network_set_connected(nw, FALSE);
		connman_network_unregister(nw);
		connman_network_unref(nw);
		wmxsdk->nw = NULL;
	} else
		DBG("disconnected from unknown network\n");
}

/*
 * The device has been disconnnected, make sure connman knows
 *
 * See __iwmx_cm_dev_disconnect() for more information.
 */
static void iwmx_cm_dev_disconnected(struct wmxsdk *wmxsdk)
{
	g_mutex_lock(wmxsdk->connect_mutex);
	__iwmx_cm_dev_disconnected(wmxsdk);
	g_mutex_unlock(wmxsdk->connect_mutex);
}

/*
 * Handle a change in state
 *
 * This is were most of the action happens. When the device changes
 * state, this will catch it (through the state change callback or an
 * explicit call) and call iwmx_cm_dev_*ed() to indicate to connman what
 * happened.
 *
 * Finally, cache the new device status.
 */
void __iwmx_cm_state_change(struct wmxsdk *wmxsdk,
					WIMAX_API_DEVICE_STATUS __new_status)
{
	WIMAX_API_DEVICE_STATUS __old_status = wmxsdk->status;
	WIMAX_API_DEVICE_STATUS old_status;
	WIMAX_API_DEVICE_STATUS new_status;

	/*
	 * Simplify state transition computations.
	 *
	 * For practical effects, some states are the same
	 */

#if HAVE_IWMXSDK_STATUS_IDLE
	/* Conection_Idle is the same as Data_Connected */
	if (__old_status == WIMAX_API_DEVICE_STATUS_Connection_Idle)
		old_status = WIMAX_API_DEVICE_STATUS_Data_Connected;
	else
		old_status = __old_status;
	if (__new_status == WIMAX_API_DEVICE_STATUS_Connection_Idle)
		new_status = WIMAX_API_DEVICE_STATUS_Data_Connected;
	else
		new_status = __new_status;
#endif /* #if HAVE_IWMXSDK_STATUS_IDLE */
	/* Radio off: all are just RF_OFF_SW (the highest) */
	switch (__old_status) {
	case WIMAX_API_DEVICE_STATUS_RF_OFF_HW_SW:
	case WIMAX_API_DEVICE_STATUS_RF_OFF_HW:
	case WIMAX_API_DEVICE_STATUS_RF_OFF_SW:
		old_status = WIMAX_API_DEVICE_STATUS_RF_OFF_SW;
		break;
	default:
		old_status = __old_status;
		break;
	}

	switch (__new_status) {
	case WIMAX_API_DEVICE_STATUS_RF_OFF_HW_SW:
	case WIMAX_API_DEVICE_STATUS_RF_OFF_HW:
	case WIMAX_API_DEVICE_STATUS_RF_OFF_SW:
		new_status = WIMAX_API_DEVICE_STATUS_RF_OFF_SW;
		break;
	default:
		new_status = __new_status;
		break;
	}

	/* If no real state change, do nothing */
	if (old_status == new_status) {
		DBG("no state changed\n");
		return;
	} else
		DBG("state change from %d (%d: %s) to %d (%d: %s)\n",
		    old_status, __old_status,
		    iwmx_sdk_dev_status_to_str(__old_status),
		    new_status, __new_status,
		    iwmx_sdk_dev_status_to_str(__new_status));

	/* Cleanup old state */
	switch (old_status) {
	case WIMAX_API_DEVICE_STATUS_UnInitialized:
		/* This means the plugin is starting but the device is
		 * in some state already, so we need to update our
		 * internal knowledge of it. */
		if (new_status > WIMAX_API_DEVICE_STATUS_RF_OFF_SW)
			iwmx_cm_dev_enabled(wmxsdk);
		break;
	case WIMAX_API_DEVICE_STATUS_RF_OFF_SW:
		/* This means the radio is being turned on, so enable
		 * the device ( unless going to uninitialized). */
		if (new_status != WIMAX_API_DEVICE_STATUS_RF_OFF_SW)
			iwmx_cm_dev_enabled(wmxsdk);
		break;
	case WIMAX_API_DEVICE_STATUS_Ready:
		break;
	case WIMAX_API_DEVICE_STATUS_Scanning:
		break;
	case WIMAX_API_DEVICE_STATUS_Connecting:
		break;
	case WIMAX_API_DEVICE_STATUS_Data_Connected:
		iwmx_cm_dev_disconnected(wmxsdk);
		break;
	default:
		connman_error("wmxsdk: unknown old status %d\n", old_status);
		return;
	};

	/* Implement new state */
	switch (new_status) {
	case WIMAX_API_DEVICE_STATUS_UnInitialized:
		break;
	case WIMAX_API_DEVICE_STATUS_RF_OFF_SW:
		/* This means the radio is being turned off, so
		 * disable the device unless coming from uninitialized. */
		if (old_status != WIMAX_API_DEVICE_STATUS_UnInitialized)
			iwmx_cm_dev_disabled(wmxsdk);
		break;
	case WIMAX_API_DEVICE_STATUS_Ready:
		break;
	case WIMAX_API_DEVICE_STATUS_Scanning:
		break;
	case WIMAX_API_DEVICE_STATUS_Connecting:
		break;
	case WIMAX_API_DEVICE_STATUS_Data_Connected:
		iwmx_cm_dev_connected(wmxsdk);
		break;
	default:
		connman_error("wmxsdk: unknown new status %d\n", old_status);
		return;
	};
	wmxsdk->status = __new_status;
}

/*
 * Implement a device state transition [locking version]
 *
 * See __iwmx_cm_state_change()
 */
void iwmx_cm_state_change(struct wmxsdk *wmxsdk,
				 WIMAX_API_DEVICE_STATUS __new_status)
{
	g_mutex_lock(wmxsdk->status_mutex);
	__iwmx_cm_state_change(wmxsdk, __new_status);
	g_mutex_unlock(wmxsdk->status_mutex);
}

/*
 * Read the cached device status
 */
WIMAX_API_DEVICE_STATUS iwmx_cm_status_get(struct wmxsdk *wmxsdk)
{
	WIMAX_API_DEVICE_STATUS status;

	g_mutex_lock(wmxsdk->status_mutex);
	status = wmxsdk->status;
	g_mutex_unlock(wmxsdk->status_mutex);
	return status;
}

/*
 * Called by connman when a device is enabled by the user
 *
 * We need to turn the radio on; the state change function will poke
 * the internals.
 */
static int iwmx_cm_enable(struct connman_device *dev)
{
	int result;
	struct wmxsdk *wmxsdk = connman_device_get_data(dev);

	connman_inet_ifup(connman_device_get_index(dev));
	result = iwmx_sdk_rf_state_set(wmxsdk, WIMAX_API_RF_ON);
	return result;
}

/*
 * Called by connman when a device is disabled by the user
 *
 * Simple: just make sure the radio is off; the state change function
 * will poke the internals.
 */
static int iwmx_cm_disable(struct connman_device *dev)
{
	int result;
	struct wmxsdk *wmxsdk = connman_device_get_data(dev);

	result = iwmx_sdk_rf_state_set(wmxsdk, WIMAX_API_RF_OFF);
	connman_inet_ifdown(connman_device_get_index(dev));
	return 0;
}

/*
 * Probe deferred call from when the mainloop is idle
 *
 * probe() schedules this to be called from the mainloop when idle to
 * do a device status evaluation. Needed because of an internal race
 * condition in connman. FIXME: deploy into _probe() when fixed.
 */
static gboolean __iwmx_cm_probe_dpc(gpointer _wmxsdk)
{
	int result;
	struct wmxsdk *wmxsdk = _wmxsdk;
	result = iwmx_sdk_get_device_status(wmxsdk);
	if (result < 0)
		connman_error("wmxsdk: can't get status: %d\n", result);
	else
		iwmx_cm_state_change(wmxsdk, result);
	return FALSE;
}

/*
 * Called by connman when a new device pops in
 *
 * We allocate our private structure, register with the WiMAX API,
 * open their device, subscribe to all the callbacks.
 *
 * At the end, we launch a deferred call (to work around current
 * connman issues that need to be fixed in the future) and update the
 * device's status. This allows us to pick up the current status and
 * adapt connman's idea of the device to it.
 */
static int iwmx_cm_probe(struct connman_device *dev)
{
	int result;
	struct wmxsdk *wmxsdk = NULL;

	wmxsdk = connman_device_get_data(dev);
	if (wmxsdk == NULL)
		/* not called from a discovery done by the WiMAX
		 * Network Service, ignore */
		return -ENODEV;

	result = iwmx_sdk_setup(wmxsdk);
	if (result < 0)
		goto error_setup;

	/* There is a race condition in the connman core that doesn't
	 * allow us to call this directly and things to work properly
	 * FIXME FIXME FIXME: merge _dpc call in here when connman is fixed */
	g_idle_add(__iwmx_cm_probe_dpc, wmxsdk);
	return 0;

	iwmx_sdk_remove(wmxsdk);
error_setup:
	return result;
}

/*
 * Called when a device is removed from connman
 *
 * Cleanup all that is done in _probe. Remove callbacks, unregister
 * from the WiMAX API.
 */
static void iwmx_cm_remove(struct connman_device *dev)
{
	struct wmxsdk *wmxsdk = connman_device_get_data(dev);
	iwmx_sdk_remove(wmxsdk);
}

/*
 * Called by connman to ask the device to scan for networks
 *
 * We have set in the WiMAX API the scan result callbacks, so we just
 * start a simple scan (not a wide one).
 *
 * First we obtain the current list of networks and pass it to the
 * callback processor. Then we start an scan cycle.
 */
static int iwmx_cm_scan(struct connman_device *dev,
			const char *ssid, unsigned int ssid_len,
			const char *identity, const char* passphrase,
			void *user_data)
{
	struct wmxsdk *wmxsdk = connman_device_get_data(dev);
	return iwmx_sdk_scan(wmxsdk);
}

/*
 * Driver for a WiMAX API based device.
 */
static struct connman_device_driver iwmx_cm_device_driver = {
	.name		= "iwmx",
	.type		= CONNMAN_DEVICE_TYPE_WIMAX,
	.probe		= iwmx_cm_probe,
	.remove		= iwmx_cm_remove,
	.enable		= iwmx_cm_enable,
	.disable	= iwmx_cm_disable,
	.scan		= iwmx_cm_scan,
};

static int iwmx_cm_init(void)
{
	int result;

	result = connman_device_driver_register(&iwmx_cm_device_driver);
	if (result < 0)
		goto error_driver_register;
	result = connman_network_driver_register(&iwmx_cm_network_driver);
	if (result < 0)
		goto error_network_driver_register;
	result = iwmx_sdk_api_init();
	if (result < 0)
		goto error_iwmx_sdk_init;
	return 0;

error_iwmx_sdk_init:
	connman_network_driver_unregister(&iwmx_cm_network_driver);
error_network_driver_register:
	connman_device_driver_unregister(&iwmx_cm_device_driver);
error_driver_register:
	return result;
}

static void iwmx_cm_exit(void)
{
	iwmx_sdk_api_exit();
	connman_network_driver_unregister(&iwmx_cm_network_driver);
	connman_device_driver_unregister(&iwmx_cm_device_driver);
}

CONNMAN_PLUGIN_DEFINE(iwmx, "Intel WiMAX SDK / Common API plugin",
			CONNMAN_VERSION, CONNMAN_PLUGIN_PRIORITY_LOW,
						iwmx_cm_init, iwmx_cm_exit);