File: conf.c

package info (click to toggle)
wavemon 0.8.2-1
  • links: PTS
  • area: main
  • in suites: buster
  • size: 848 kB
  • sloc: ansic: 5,273; sh: 3,062; makefile: 59
file content (580 lines) | stat: -rw-r--r-- 14,495 bytes parent folder | download | duplicates (2)
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
/*
 * wavemon - a wireless network monitoring aplication
 *
 * Copyright (c) 2001-2002 Jan Morgenstern <jan@jm-music.de>
 *
 * wavemon 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, or (at your option) any later
 * version.
 *
 * wavemon 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 wavemon; see the file COPYING.  If not, write to the Free Software
 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */
#include "wavemon.h"
#include <pwd.h>
#include <sys/types.h>
#include <netlink/version.h>

/* GLOBALS */
#define MAX_IFLIST_ENTRIES 64
static char *if_list[MAX_IFLIST_ENTRIES]; /* array of WiFi interface names */
int conf_items;			/* index into array storing menu items */

static char *on_off_names[] = { [false] = "Off", [true] = "On", NULL };
static char *action_items[] = {
	[TA_DISABLED]	= "Disabled",
	[TA_BEEP]	= "Beep",
	[TA_FLASH]	= "Flash",
	[TA_BEEP_FLASH]	= "Beep+Flash",
	NULL
};

static char *sort_order[] = {
	[SO_CHAN]	= "Channel",
	[SO_SIGNAL]	= "Signal",
	[SO_MAC]	= "MAC",
	[SO_ESSID]	= "Essid",
	[SO_OPEN]	= "Open",
	[SO_CHAN_SIG]	= "Chan/Sig",
	[SO_OPEN_SIG]	= "Open/Sig",
	NULL
};

static char *screen_names[] = {
	[SCR_INFO]	= "Info screen",
	[SCR_LHIST]	= "Histogram",
	[SCR_SCAN]	= "Scan window",
	NULL
};

struct wavemon_conf conf = {
	.if_idx			= 0,

	.stat_iv		= 100,
	.info_iv		= 10,
	.slotsize		= 4,
	.meter_decay		= 0,

	.check_geometry		= false,
	.cisco_mac		= false,
	.override_bounds	= false,

	.sig_min		= -100,
	.sig_max		= -10,
	.noise_min		= -120,
	.noise_max		= -40,

	.scan_sort_order	= SO_CHAN_SIG,
	.scan_sort_asc		= false,
	.lthreshold_action	= TA_DISABLED,
	.lthreshold		= -80,
	.hthreshold_action	= TA_DISABLED,
	.hthreshold		= -10,

	.startup_scr		= 0,
};

/** Populate interface list */
void conf_get_interface_list(void)
{
	char *old_if = NULL;
	int idx;

	for (idx = 0; if_list[idx]; idx++) {
		if (idx == conf.if_idx)
			old_if = if_list[idx];
		else
			free(if_list[idx]);
	}
	iw_get_interface_list(if_list, MAX_IFLIST_ENTRIES);
	if (!if_list[0])
		err_quit("no supported wireless interfaces found! Check manpage for help.");

	conf.if_idx = 0;
	if (old_if) {
		idx = argv_find(if_list, old_if);
		if (idx > 0)
			conf.if_idx = idx;
		free(old_if);
	}
}

/** Return currently selected interface name */
const char *conf_ifname(void)
{
	return if_list[0] && if_list[conf.if_idx] ? if_list[conf.if_idx] : "(none)";
}

/* Return full path of rcfile. Allocates string which must bee free()-d. */
static char *get_confname(void)
{
	char *full_path, *homedir = getenv("HOME");
	struct passwd *pw;

	if (homedir == NULL) {
		pw = getpwuid(getuid());
		if (pw == NULL)
			err_quit("can not determine $HOME");
		homedir = pw->pw_dir;
	}
	full_path = malloc(strlen(homedir) + strlen(CFNAME) + 3);
	sprintf(full_path, "%s/%s", homedir, CFNAME);

	return full_path;
}

static void write_cf(void)
{
	char tmp[0x100], rv[0x40];
	struct conf_item *ci = NULL;
	char *lp, *cp;
	int add, i;
	char *cfname = get_confname();
	int cfld = ll_create();
	FILE *fd = fopen(cfname, "w");

	if (fd == NULL)
		err_sys("failed to open configuration file '%s'", cfname);

	for (ll_reset(conf_items); (ci = ll_getall(conf_items)); ) {
		if (ci->type != t_sep && ci->type != t_func &&
		    (!ci->dep || (ci->dep && *ci->dep))) {
			switch (ci->type) {
			case t_int:
				sprintf(rv, "%d", *ci->v.i);
				break;
			case t_list:
				if (!argv_count(ci->list))
					continue;
				sprintf(rv, "%s", ci->list[*ci->v.i]);
				str_tolower(rv);
				break;
			case t_sep:
			case t_func:
				break;
			}

			add = 1;

			for (i = 0; i < ll_size(cfld); i++) {
				lp = ll_get(cfld, i);
				cp = lp += strspn(lp, " ");
				if (!strncasecmp(cp, ci->cfname, strcspn(cp, " ="))
				    && strlen(ci->cfname) == strcspn(cp, " =")) {
					add = 0;
					cp += strcspn(cp, "=") + 1;
					cp += strspn(cp, " ");
					strncpy(tmp, cp, strcspn(cp, " #\n"));
					if (strcasecmp(tmp, rv)) {
						strncpy(tmp, lp, strcspn(lp, " ="));
						tmp[strcspn(lp, " =")] = '\0';
						strcat(tmp, " = ");
						strcat(tmp, rv);
						strcat(tmp, "\n");
						ll_replace(cfld, i, "s", tmp);
					}
				}
			}

			if (add) {
				strcpy(tmp, ci->cfname);
				strcat(tmp, " = ");
				strcat(tmp, rv);
				strcat(tmp, "\n");
				ll_push(cfld, "s", tmp);
			}
		}
	}

	for (ll_reset(cfld); (lp = ll_getall(cfld)); )
		fputs(lp, fd);
	fclose(fd);

	ll_destroy(cfld);
	free(cfname);
}

static void read_cf(void)
{
	char tmp[0x100], lv[0x20], rv[0x20];
	struct conf_item *ci = NULL;
	FILE *fd;
	size_t len;
	int lnum, found, v_int;
	char *lp, *conv_err;
	bool file_needs_update = false;
	char *cfname = get_confname();

	if (access(cfname, F_OK) != 0)
		goto done;

	fd = fopen(cfname, "r");
	if (fd == NULL)
		err_sys("can not read configuration file '%s'", cfname);

	for (lnum = 1; fgets(tmp, sizeof(tmp), fd); lnum++) {
		lp = tmp + strspn(tmp, " ");
		if (*lp == '#' || *lp == '\n')
			continue;

		len = strcspn(lp, " =");
		if (len > sizeof(lv))
			err_quit("parse error in %s, line %d: identifier too long",
				 cfname, lnum);
		strncpy(lv, lp, len);
		lv[len] = '\0';
		lp += len;

		ll_reset(conf_items);
		for (found = 0; !found && (ci = ll_getall(conf_items)); )
			found = (ci->type != t_sep && ci->type != t_func &&
				 strcasecmp(ci->cfname, lv) == 0);
		if (!found) {
			err_msg("%s, line %d: ignoring unknown identifier '%s'",
				cfname, lnum, lv);
			file_needs_update = true;
			continue;
		}

		lp += strspn(lp, " ");
		if (*lp++ != '=')
			err_quit("parse error in %s, line %d: missing '=' operator in assignment",
				 cfname, lnum);
		lp += strspn(lp, " ");

		len = strcspn(lp, " \n");
		if (len > sizeof(rv))
			err_quit("parse error in %s, line %d: argument too long", cfname, lnum);
		else if (*lp == '\n')
			err_quit("parse error in %s, line %d: argument expected", cfname, lnum);
		strncpy(rv, lp, len);
		rv[len] = '\0';

		switch (ci->type) {
		case t_int:
			v_int = strtol(rv, &conv_err, 10);
			if (*conv_err != '\0') {
				err_quit("parse error in %s, line %d: integer value expected, '%s' found instead",
					 cfname, lnum, rv);
			} else if (v_int > ci->max) {
				err_msg("%s, line %d: value exceeds maximum of %d - using maximum",
					 cfname, lnum, (int)ci->max);
				*ci->v.i = ci->max;
				file_needs_update = true;
			} else if (v_int < ci->min) {
				err_msg("%s, line %d: value is below minimum of %d - using minimum",
					 cfname, lnum, (int)ci->min);
				*ci->v.i = ci->min;
				file_needs_update = true;
			} else {
				*ci->v.i = v_int;
			}
			break;
		case t_list:
			assert(ci->list != NULL);
			if (!argv_count(ci->list))
				err_quit("no usable %s candidates available for '%s'", ci->name, rv);
			v_int = argv_find(ci->list, rv);
			if (v_int < 0) {
				err_msg("%s, line %d: '%s = %s' is not valid - using defaults",
					 cfname, lnum, lv, rv);
				file_needs_update = true;
			} else {
				*ci->v.i = v_int;
			}
		case t_sep:
		case t_func:
			break;
		}
	}
	fclose(fd);
done:
	free(cfname);

	if (file_needs_update) {
		write_cf();
	}
}

static void init_conf_items(void)
{
	struct conf_item *item;

	conf_items = ll_create();

	item = calloc(1, sizeof(*item));
	item->name = strdup("Interface");
	item->type = t_sep;
	ll_push(conf_items, "*", item);

	item = calloc(1, sizeof(*item));
	item->name	= strdup("Interface");
	item->cfname	= strdup("interface");
	item->type	= t_list;
	item->v.i	= &conf.if_idx;
	item->list	= if_list;
	ll_push(conf_items, "*", item);

	item = calloc(1, sizeof(*item));
	item->name	= strdup("Cisco-style MAC addresses");
	item->cfname	= strdup("cisco_mac");
	item->type	= t_list;
	item->v.i	= &conf.cisco_mac;
	item->list	= on_off_names;
	ll_push(conf_items, "*", item);

	item = calloc(1, sizeof(*item));
	item->name	= strdup("Scan sort type");
	item->cfname	= strdup("sort_order");
	item->type	= t_list;
	item->v.i	= &conf.scan_sort_order;
	item->list	= sort_order;
	ll_push(conf_items, "*", item);

	item = calloc(1, sizeof(*item));
	item->name	= strdup("Scan sort in ascending order");
	item->cfname	= strdup("sort_ascending");
	item->type	= t_list;
	item->v.i	= &conf.scan_sort_asc;
	item->list	= on_off_names;
	ll_push(conf_items, "*", item);

	item = calloc(1, sizeof(*item));
	item->name	= strdup("Statistics updates");
	item->cfname	= strdup("stat_updates");
	item->type	= t_int;
	item->v.i	= &conf.stat_iv;
	item->min	= 10;
	item->max	= 4000;
	item->inc	= 10;
	item->unit	= strdup("ms");
	ll_push(conf_items, "*", item);

	item = calloc(1, sizeof(*item));
	item->name	= strdup("Histogram update cycles");
	item->cfname	= strdup("lhist_slot_size");
	item->type	= t_int;
	item->v.i	= &conf.slotsize;
	item->min	= 1;
	item->max	= 64;
	item->inc	= 1;
	ll_push(conf_items, "*", item);

	item = calloc(1, sizeof(*item));
	item->name	= strdup("Level meter smoothness");
	item->cfname	= strdup("meter_smoothness");
	item->type	= t_int;
	item->v.i	= &conf.meter_decay;
	item->min	= 0;
	item->max	= 99;
	item->inc	= 1;
	item->unit	= strdup("%");
	ll_push(conf_items, "*", item);

	item = calloc(1, sizeof(*item));
	item->name	= strdup("Dynamic info updates");
	item->cfname	= strdup("info_updates");
	item->type	= t_int;
	item->v.i	= &conf.info_iv;
	item->min	= 1;
	item->max	= 60;
	item->inc	= 1;
	item->unit	= strdup("s");
	ll_push(conf_items, "*", item);

	/* level scale items */
	item = calloc(1, sizeof(*item));
	item->type = t_sep;
	ll_push(conf_items, "*", item);

	item = calloc(1, sizeof(*item));
	item->name = strdup("Level scales");
	item->type = t_sep;
	ll_push(conf_items, "*", item);

	item = calloc(1, sizeof(*item));
	item->name	= strdup("Override scale autodetect");
	item->cfname	= strdup("override_auto_scale");
	item->type	= t_list;
	item->v.i	= &conf.override_bounds;
	item->list	= on_off_names;
	ll_push(conf_items, "*", item);

	item = calloc(1, sizeof(*item));
	item->name	= strdup("Minimum signal level");
	item->cfname	= strdup("min_signal_level");
	item->type	= t_int;
	item->v.i	= &conf.sig_min;
	item->min	= -100;
	item->max	= -39;
	item->inc	= 1;
	item->unit	= strdup("dBm");
	item->dep	= &conf.override_bounds;
	ll_push(conf_items, "*", item);

	item = calloc(1, sizeof(*item));
	item->name	= strdup("Maximum signal level");
	item->cfname	= strdup("max_signal_level");
	item->type	= t_int;
	item->v.i	= &conf.sig_max;
	item->min	= -40;
	item->max	= -10;
	item->inc	= 1;
	item->unit	= strdup("dBm");
	item->dep	= &conf.override_bounds;
	ll_push(conf_items, "*", item);

	item = calloc(1, sizeof(*item));
	item->name	= strdup("Minimum noise level");
	item->cfname	= strdup("min_noise_level");
	item->type	= t_int;
	item->v.i	= &conf.noise_min;
	item->min	= -120;
	item->max	= -70;
	item->inc	= 1;
	item->unit	= strdup("dBm");
	item->dep	= &conf.override_bounds;
	ll_push(conf_items, "*", item);

	item = calloc(1, sizeof(*item));
	item->name	= strdup("Maximum noise level");
	item->cfname	= strdup("max_noise_level");
	item->type	= t_int;
	item->v.i	= &conf.noise_max;
	item->min	= -69;
	item->max	= -40;
	item->inc	= 1;
	item->unit	= strdup("dBm");
	item->dep	= &conf.override_bounds;
	ll_push(conf_items, "*", item);

	/* thresholds */
	item = calloc(1, sizeof(*item));
	item->name	= strdup("Low threshold action");
	item->cfname	= strdup("lo_threshold_action");
	item->type	= t_list;
	item->v.i	= &conf.lthreshold_action;
	item->list	= action_items;
	ll_push(conf_items, "*", item);

	item = calloc(1, sizeof(*item));
	item->name	= strdup("Low threshold");
	item->cfname	= strdup("lo_threshold");
	item->type	= t_int;
	item->v.i	= &conf.lthreshold;
	item->min	= -120;
	item->max	= -60;
	item->inc	= 1;
	item->unit	= strdup("dBm");
	item->dep	= &conf.lthreshold_action;
	ll_push(conf_items, "*", item);

	item = calloc(1, sizeof(*item));
	item->name	= strdup("High threshold action");
	item->cfname	= strdup("hi_threshold_action");
	item->type	= t_list;
	item->v.i	= &conf.hthreshold_action;
	item->list	= action_items;
	ll_push(conf_items, "*", item);

	item = calloc(1, sizeof(*item));
	item->name	= strdup("High threshold");
	item->cfname	= strdup("hi_threshold");
	item->type	= t_int;
	item->v.i	= &conf.hthreshold;
	item->min	= -59;
	item->max	= 120;
	item->inc	= 1;
	item->unit	= strdup("dBm");
	item->dep	= &conf.hthreshold_action;
	ll_push(conf_items, "*", item);

	/* start-up items */
	item = calloc(1, sizeof(*item));
	item->type = t_sep;
	ll_push(conf_items, "*", item);

	item = calloc(1, sizeof(*item));
	item->name = strdup("Startup");
	item->type = t_sep;
	ll_push(conf_items, "*", item);

	item = calloc(1, sizeof(*item));
	item->name	= strdup("Startup screen");
	item->cfname	= strdup("startup_screen");
	item->type	= t_list;
	item->v.i	= &conf.startup_scr;
	item->list	= screen_names;
	ll_push(conf_items, "*", item);

	/* separator (dummy entry) */
	item = calloc(1, sizeof(*item));
	item->type	= t_sep;
	ll_push(conf_items, "*", item);

	/* functions */
	item = calloc(1, sizeof(*item));
	item->name	= strdup("Save configuration");
	item->type	= t_func;
	item->v.fp	= write_cf;
	ll_push(conf_items, "*", item);
}

void getconf(int argc, char *argv[])
{
	int arg, help = 0, version = 0;
	const char *iface = NULL;

	while ((arg = getopt(argc, argv, "ghi:v")) >= 0) {
		switch (arg) {
		case 'g':
			conf.check_geometry = true;
			break;
		case 'h':
			help++;
			break;
		case 'i':
			iface = optarg;
			break;
		case 'v':
			version++;
			break;
		default:
			exit(EXIT_FAILURE);
		}
	}

	if (version) {
		printf("wavemon %s\n", PACKAGE_VERSION);
		printf("Distributed under the terms of the GPLv3.\n%s", help ? "\n" : "");
	}
	if (help) {
		printf("usage: wavemon [ -hgv ] [ -i ifname ]\n");
		printf("  -g            Ensure screen is sufficiently dimensioned\n");
		printf("  -h            This help screen\n");
		printf("  -i <ifname>   Use specified network interface (default: auto)\n");
		printf("  -v            Print version details\n");
	}

	if (version || help) {
		exit(EXIT_SUCCESS);
	}

	/* Actual initialization. */
	conf_get_interface_list();
	init_conf_items();
	read_cf();

	if (iface) {
		conf.if_idx = argv_find(if_list, iface);
		if (conf.if_idx < 0)
			err_quit("%s is not a usable wireless interface", iface);
	}
}