summaryrefslogtreecommitdiff
path: root/mesh/mesh-io-unit.c
blob: f4f6198036ebba9277f1a8fd92f9db8220d7bc14 (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
// SPDX-License-Identifier: LGPL-2.1-or-later
/*
 *
 *  BlueZ - Bluetooth protocol stack for Linux
 *
 *  Copyright (C) 2021  Intel Corporation. All rights reserved.
 *
 *
 */

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

#include <errno.h>
#include <string.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include <stdio.h>
#include <ell/ell.h>

#include "mesh/mesh-defs.h"
#include "mesh/dbus.h"
#include "mesh/mesh-io.h"
#include "mesh/mesh-io-api.h"
#include "mesh/mesh-io-unit.h"

struct mesh_io_private {
	struct mesh_io *io;
	struct l_io *sio;
	void *user_data;
	char *unique_name;
	struct l_timeout *tx_timeout;
	struct l_queue *rx_regs;
	struct l_queue *tx_pkts;
	struct sockaddr_un addr;
	int fd;
	uint16_t interval;
};

struct pvt_rx_reg {
	mesh_io_recv_func_t cb;
	void *user_data;
	uint8_t len;
	uint8_t filter[0];
};

struct process_data {
	struct mesh_io_private		*pvt;
	const uint8_t			*data;
	uint8_t				len;
	struct mesh_io_recv_info	info;
};

struct tx_pkt {
	struct mesh_io_send_info	info;
	bool				delete;
	uint8_t				len;
	uint8_t				pkt[30];
};

struct tx_pattern {
	const uint8_t			*data;
	uint8_t				len;
};

static uint32_t get_instant(void)
{
	struct timeval tm;
	uint32_t instant;

	gettimeofday(&tm, NULL);
	instant = tm.tv_sec * 1000;
	instant += tm.tv_usec / 1000;

	return instant;
}

static uint32_t instant_remaining_ms(uint32_t instant)
{
	instant -= get_instant();
	return instant;
}

static void process_rx_callbacks(void *v_reg, void *v_rx)
{
	struct pvt_rx_reg *rx_reg = v_reg;
	struct process_data *rx = v_rx;

	if (!memcmp(rx->data, rx_reg->filter, rx_reg->len))
		rx_reg->cb(rx_reg->user_data, &rx->info, rx->data, rx->len);
}

static void process_rx(struct mesh_io_private *pvt, int8_t rssi,
					uint32_t instant, const uint8_t *addr,
					const uint8_t *data, uint8_t len)
{
	struct process_data rx = {
		.pvt = pvt,
		.data = data,
		.len = len,
		.info.instant = instant,
		.info.addr = addr,
		.info.chan = 7,
		.info.rssi = rssi,
	};

	l_queue_foreach(pvt->rx_regs, process_rx_callbacks, &rx);
}

static bool incoming(struct l_io *sio, void *user_data)
{
	struct mesh_io_private *pvt = user_data;
	uint32_t instant;
	uint8_t buf[31];
	size_t size;

	instant = get_instant();

	size = recv(pvt->fd, buf, sizeof(buf), MSG_DONTWAIT);

	if (size > 9 && buf[0]) {
		process_rx(pvt, -20, instant, NULL, buf + 1, (uint8_t)size);
	} else if (size == 1 && !buf[0] && pvt->unique_name) {

		/* Return DBUS unique name */
		size = strlen(pvt->unique_name);

		if (size > sizeof(buf) - 2)
			return true;

		buf[0] = 0;
		memcpy(buf + 1, pvt->unique_name, size + 1);
		if (send(pvt->fd, buf, size + 2, MSG_DONTWAIT) < 0)
			l_error("Failed to send(%d)", errno);
	}

	return true;
}

static bool find_by_ad_type(const void *a, const void *b)
{
	const struct tx_pkt *tx = a;
	uint8_t ad_type = L_PTR_TO_UINT(b);

	return !ad_type || ad_type == tx->pkt[0];
}

static bool find_by_pattern(const void *a, const void *b)
{
	const struct tx_pkt *tx = a;
	const struct tx_pattern *pattern = b;

	if (tx->len < pattern->len)
		return false;

	return (!memcmp(tx->pkt, pattern->data, pattern->len));
}

static void free_socket(struct mesh_io_private *pvt)
{
	l_io_destroy(pvt->sio);
	close(pvt->fd);
	unlink(pvt->addr.sun_path);
}

static void hello_callback(struct l_dbus_message *msg, void *user_data)
{
	struct mesh_io_private *pvt = user_data;

	pvt->unique_name = l_strdup(l_dbus_message_get_destination(msg));
	l_debug("User-Daemon unique name: %s", pvt->unique_name);
}

static void get_name(struct l_timeout *timeout, void *user_data)
{
	struct mesh_io_private *pvt = user_data;
	struct l_dbus *dbus = dbus_get_bus();
	struct l_dbus_message *msg;

	l_timeout_remove(timeout);
	if (!dbus) {
		l_timeout_create_ms(20, get_name, pvt, NULL);
		return;
	}

	/* Retrieve unique name */
	msg = l_dbus_message_new_method_call(dbus, "org.freedesktop.DBus",
							"/org/freedesktop/DBus",
							"org.freedesktop.DBus",
							"GetId");

	l_dbus_message_set_arguments(msg, "");

	l_dbus_send_with_reply(dbus, msg, hello_callback, pvt, NULL);
}

static void unit_up(void *user_data)
{
	struct mesh_io_private *pvt = user_data;

	l_debug("Started io-unit");

	if (pvt->io && pvt->io->ready)
		pvt->io->ready(pvt->user_data, true);

	l_timeout_create_ms(1, get_name, pvt, NULL);
}

static bool unit_init(struct mesh_io *io, void *opt, void *user_data)
{
	struct mesh_io_private *pvt;
	char *sk_path;
	size_t size;

	l_debug("Starting Unit test IO");
	if (!io || io->pvt)
		return false;

	sk_path = (char *) opt;

	pvt = l_new(struct mesh_io_private, 1);

	pvt->addr.sun_family = AF_LOCAL;
	snprintf(pvt->addr.sun_path, sizeof(pvt->addr.sun_path), "%s",
								sk_path);

	pvt->fd = socket(PF_LOCAL, SOCK_DGRAM | SOCK_CLOEXEC, 0);
	if (pvt->fd < 0)
		goto fail;

	unlink(pvt->addr.sun_path);
	size = offsetof(struct sockaddr_un, sun_path) +
						strlen(pvt->addr.sun_path);

	if (bind(pvt->fd, (struct sockaddr *) &pvt->addr, size) < 0)
		goto fail;

	/* Setup socket handlers */
	pvt->sio = l_io_new(pvt->fd);
	if (!l_io_set_read_handler(pvt->sio, incoming, pvt, NULL))
		goto fail;

	pvt->rx_regs = l_queue_new();
	pvt->tx_pkts = l_queue_new();

	pvt->io = io;
	pvt->user_data = user_data;

	io->pvt = pvt;

	l_idle_oneshot(unit_up, pvt, NULL);

	return true;

fail:
	l_error("Failed to bind Unit Test socket");
	free_socket(pvt);
	l_free(pvt);

	return false;
}

static bool unit_destroy(struct mesh_io *io)
{
	struct mesh_io_private *pvt = io->pvt;

	if (!pvt)
		return true;

	l_free(pvt->unique_name);
	l_timeout_remove(pvt->tx_timeout);
	l_queue_destroy(pvt->rx_regs, l_free);
	l_queue_destroy(pvt->tx_pkts, l_free);

	free_socket(pvt);

	l_free(pvt);
	io->pvt = NULL;

	return true;
}

static bool unit_caps(struct mesh_io *io, struct mesh_io_caps *caps)
{
	struct mesh_io_private *pvt = io->pvt;

	if (!pvt || !caps)
		return false;

	caps->max_num_filters = 255;
	caps->window_accuracy = 50;

	return true;
}

static bool simple_match(const void *a, const void *b)
{
	return a == b;
}

static void send_pkt(struct mesh_io_private *pvt, struct tx_pkt *tx,
							uint16_t interval)
{
	if (send(pvt->fd, tx->pkt, tx->len, MSG_DONTWAIT) < 0)
		l_error("Failed to send(%d)", errno);

	if (tx->delete) {
		l_queue_remove_if(pvt->tx_pkts, simple_match, tx);
		l_free(tx);
	}
}

static void tx_to(struct l_timeout *timeout, void *user_data)
{
	struct mesh_io_private *pvt = user_data;
	struct tx_pkt *tx;
	uint16_t ms;
	uint8_t count;

	if (!pvt)
		return;

	tx = l_queue_pop_head(pvt->tx_pkts);
	if (!tx) {
		l_timeout_remove(timeout);
		pvt->tx_timeout = NULL;
		return;
	}

	if (tx->info.type == MESH_IO_TIMING_TYPE_GENERAL) {
		ms = tx->info.u.gen.interval;
		count = tx->info.u.gen.cnt;
		if (count != MESH_IO_TX_COUNT_UNLIMITED)
			tx->info.u.gen.cnt--;
	} else {
		ms = 25;
		count = 1;
	}

	tx->delete = !!(count == 1);

	send_pkt(pvt, tx, ms);

	if (count == 1) {
		/* Recalculate wakeup if we are responding to POLL */
		tx = l_queue_peek_head(pvt->tx_pkts);

		if (tx && tx->info.type == MESH_IO_TIMING_TYPE_POLL_RSP) {
			ms = instant_remaining_ms(tx->info.u.poll_rsp.instant +
						tx->info.u.poll_rsp.delay);
		}
	} else
		l_queue_push_tail(pvt->tx_pkts, tx);

	if (timeout) {
		pvt->tx_timeout = timeout;
		l_timeout_modify_ms(timeout, ms);
	} else
		pvt->tx_timeout = l_timeout_create_ms(ms, tx_to, pvt, NULL);
}

static void tx_worker(void *user_data)
{
	struct mesh_io_private *pvt = user_data;
	struct tx_pkt *tx;
	uint32_t delay;

	tx = l_queue_peek_head(pvt->tx_pkts);
	if (!tx)
		return;

	switch (tx->info.type) {
	case MESH_IO_TIMING_TYPE_GENERAL:
		if (tx->info.u.gen.min_delay == tx->info.u.gen.max_delay)
			delay = tx->info.u.gen.min_delay;
		else {
			l_getrandom(&delay, sizeof(delay));
			delay %= tx->info.u.gen.max_delay -
						tx->info.u.gen.min_delay;
			delay += tx->info.u.gen.min_delay;
		}
		break;

	case MESH_IO_TIMING_TYPE_POLL:
		if (tx->info.u.poll.min_delay == tx->info.u.poll.max_delay)
			delay = tx->info.u.poll.min_delay;
		else {
			l_getrandom(&delay, sizeof(delay));
			delay %= tx->info.u.poll.max_delay -
						tx->info.u.poll.min_delay;
			delay += tx->info.u.poll.min_delay;
		}
		break;

	case MESH_IO_TIMING_TYPE_POLL_RSP:
		/* Delay until Instant + Delay */
		delay = instant_remaining_ms(tx->info.u.poll_rsp.instant +
						tx->info.u.poll_rsp.delay);
		if (delay > 255)
			delay = 0;
		break;

	default:
		return;
	}

	if (!delay)
		tx_to(pvt->tx_timeout, pvt);
	else if (pvt->tx_timeout)
		l_timeout_modify_ms(pvt->tx_timeout, delay);
	else
		pvt->tx_timeout = l_timeout_create_ms(delay, tx_to, pvt, NULL);
}

static bool send_tx(struct mesh_io *io, struct mesh_io_send_info *info,
					const uint8_t *data, uint16_t len)
{
	struct mesh_io_private *pvt = io->pvt;
	struct tx_pkt *tx;
	bool sending = false;

	if (!info || !data || !len || len > sizeof(tx->pkt))
		return false;

	tx = l_new(struct tx_pkt, 1);

	memcpy(&tx->info, info, sizeof(tx->info));
	memcpy(&tx->pkt, data, len);
	tx->len = len;

	if (info->type == MESH_IO_TIMING_TYPE_POLL_RSP)
		l_queue_push_head(pvt->tx_pkts, tx);
	else {
		sending = !l_queue_isempty(pvt->tx_pkts);

		l_queue_push_tail(pvt->tx_pkts, tx);
	}

	if (!sending) {
		l_timeout_remove(pvt->tx_timeout);
		pvt->tx_timeout = NULL;
		l_idle_oneshot(tx_worker, pvt, NULL);
	}

	return true;
}

static bool tx_cancel(struct mesh_io *io, const uint8_t *data, uint8_t len)
{
	struct mesh_io_private *pvt = io->pvt;
	struct tx_pkt *tx;

	if (!data)
		return false;

	if (len == 1) {
		do {
			tx = l_queue_remove_if(pvt->tx_pkts, find_by_ad_type,
							L_UINT_TO_PTR(data[0]));
			l_free(tx);

		} while (tx);
	} else {
		struct tx_pattern pattern = {
			.data = data,
			.len = len
		};

		do {
			tx = l_queue_remove_if(pvt->tx_pkts, find_by_pattern,
								&pattern);
			l_free(tx);

		} while (tx);
	}

	if (l_queue_isempty(pvt->tx_pkts)) {
		l_timeout_remove(pvt->tx_timeout);
		pvt->tx_timeout = NULL;
	}

	return true;
}

static bool find_by_filter(const void *a, const void *b)
{
	const struct pvt_rx_reg *rx_reg_old = a;
	const struct pvt_rx_reg *rx_reg = b;

	if (rx_reg_old->len != rx_reg->len)
		return false;

	return !memcmp(rx_reg_old->filter, rx_reg->filter, rx_reg->len);
}

static bool recv_register(struct mesh_io *io, const uint8_t *filter,
			uint8_t len, mesh_io_recv_func_t cb, void *user_data)
{
	struct mesh_io_private *pvt = io->pvt;
	struct pvt_rx_reg *rx_reg, *rx_reg_old;

	if (!cb || !filter || !len)
		return false;

	rx_reg = l_malloc(sizeof(*rx_reg) + len);

	memcpy(rx_reg->filter, filter, len);
	rx_reg->len = len;
	rx_reg->cb = cb;
	rx_reg->user_data = user_data;

	rx_reg_old = l_queue_remove_if(pvt->rx_regs, find_by_filter, rx_reg);

	l_free(rx_reg_old);

	l_queue_push_head(pvt->rx_regs, rx_reg);

	return true;
}

static bool recv_deregister(struct mesh_io *io, const uint8_t *filter,
								uint8_t len)
{
	return true;
}

const struct mesh_io_api mesh_io_unit = {
	.init = unit_init,
	.destroy = unit_destroy,
	.caps = unit_caps,
	.send = send_tx,
	.reg = recv_register,
	.dereg = recv_deregister,
	.cancel = tx_cancel,
};