File: functions.c

package info (click to toggle)
batctl 2010.0.0-2
  • links: PTS, VCS
  • area: main
  • in suites: squeeze
  • size: 324 kB
  • ctags: 356
  • sloc: ansic: 3,547; makefile: 73; sh: 29
file content (331 lines) | stat: -rw-r--r-- 7,270 bytes parent folder | download
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
/*
 * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
 *
 * Andreas Langer <a.langer@q-dsl.de>, Marek Lindner <lindner_marek@yahoo.de>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License 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 Street, Fifth Floor, Boston, MA
 * 02110-1301, USA
 *
 */


#define _GNU_SOURCE
#include <netinet/ether.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/time.h>

#include "main.h"
#include "functions.h"
#include "bat-hosts.h"

static struct timeval start_time;
static char *host_name;
char *line_ptr = NULL;

void start_timer(void)
{
	gettimeofday(&start_time, NULL);
}

double end_timer(void)
{
	struct timeval end_time, diff;

	gettimeofday(&end_time, NULL);
	diff.tv_sec = end_time.tv_sec - start_time.tv_sec;
	diff.tv_usec = end_time.tv_usec - start_time.tv_usec;

	if (diff.tv_usec < 0) {
		diff.tv_sec--;
		diff.tv_usec += 1000000;
	}

	return (((double)diff.tv_sec * 1000) + ((double)diff.tv_usec / 1000));
}

char *ether_ntoa_long(const struct ether_addr *addr)
{
	static char asc[18];

	sprintf(asc, "%02x:%02x:%02x:%02x:%02x:%02x",
		addr->ether_addr_octet[0], addr->ether_addr_octet[1],
		addr->ether_addr_octet[2], addr->ether_addr_octet[3],
		addr->ether_addr_octet[4], addr->ether_addr_octet[5]);

	return asc;
}

char *get_name_by_macaddr(struct ether_addr *mac_addr, int read_opt)
{
	struct bat_host *bat_host = NULL;

	if (read_opt & USE_BAT_HOSTS)
		bat_host = bat_hosts_find_by_mac((char *)mac_addr);

	if (!bat_host)
		host_name = ether_ntoa_long((struct ether_addr *)mac_addr);
	else
		host_name = bat_host->name;

	return host_name;
}

char *get_name_by_macstr(char *mac_str, int read_opt)
{
	struct ether_addr *mac_addr;

	mac_addr = ether_aton(mac_str);
	if (!mac_addr)
		return mac_str;

	return get_name_by_macaddr(mac_addr, read_opt);
}

static int check_proc_dir(char *dir)
{
	struct stat st;

	if (stat("/proc/", &st) != 0) {
		printf("Error - the folder '/proc' was not found on the system\n");
		printf("Please make sure that the proc filesystem is properly mounted\n");
		return EXIT_FAILURE;
	}

	if (stat(dir, &st) == 0)
		return EXIT_SUCCESS;

	printf("Error - the folder '%s' was not found within the proc filesystem\n", dir);
	printf("Please make sure that the batman-adv kernel module is loaded\n");
	return EXIT_FAILURE;
}

int check_sys_dir(char *dir)
{
	struct stat st;

	if (stat("/sys/", &st) != 0) {
		printf("Error - the folder '/sys/' was not found on the system\n");
		printf("Please make sure that the sys filesystem is properly mounted\n");
		return EXIT_FAILURE;
	}

	if (stat(dir, &st) == 0)
		return EXIT_SUCCESS;

	printf("Error - the folder '%s' was not found within the sys filesystem\n", dir);
	printf("Please make sure that the batman-adv kernel module is loaded\n");
	return EXIT_FAILURE;
}

int read_file(char *dir, char *fname, int read_opt)
{
	struct ether_addr *mac_addr;
	struct bat_host *bat_host;
	int res = EXIT_FAILURE;
	char full_path[500], *buff_ptr, *space_ptr, extra_char;
	size_t len = 0;
	ssize_t read;
	FILE *fp = NULL;

	if (read_opt & USE_BAT_HOSTS)
		bat_hosts_init();

	if (strstr(dir, "/proc/")) {
		if (check_proc_dir(dir) != EXIT_SUCCESS)
			goto out;
	} else if (strstr(dir, "/sys/")) {
		if (check_sys_dir(dir) != EXIT_SUCCESS)
			goto out;
	}

	strncpy(full_path, dir, strlen(dir));
	full_path[strlen(dir)] = '\0';
	strncat(full_path, fname, sizeof(full_path) - strlen(full_path));

open:
	fp = fopen(full_path, "r");

	if (!fp) {
		if (!(read_opt & SILENCE_ERRORS))
			printf("Error - can't open file '%s': %s\n", full_path, strerror(errno));
		goto out;
	}

	if (read_opt & CLR_CONT_READ)
		system("clear");

read:
	while ((read = getline(&line_ptr, &len, fp)) != -1) {
		if (read_opt & SEARCH_ARGS) {
			/* omit log lines which don't start with the correct tag */
			if (strncmp(line_ptr, SEARCH_ARGS_TAG, strlen(SEARCH_ARGS_TAG)) == 0)
				break;

			continue;
		}

		/* the buffer will be handled elsewhere */
		if (read_opt & USE_READ_BUFF)
			break;

		if (read_opt & LOG_MODE) {
			/* omit log lines which don't start with the correct tag */
			if (strncmp(line_ptr, BATMAN_ADV_TAG, strlen(BATMAN_ADV_TAG)) != 0)
				continue;
		}

		if (!(read_opt & USE_BAT_HOSTS)) {
			printf("%s", line_ptr);
			continue;
		}

		/* replace mac addresses with bat host names */
		buff_ptr = line_ptr;

		while ((space_ptr = strchr(buff_ptr, ' ')) != NULL) {

			*space_ptr = '\0';
			extra_char = '\0';

			if ((strlen(buff_ptr) == ETH_STR_LEN + 1) && (buff_ptr[ETH_STR_LEN] == ',')) {
				extra_char = ',';
				buff_ptr[ETH_STR_LEN] = '\0';
			}

			if (strlen(buff_ptr) != ETH_STR_LEN)
				goto print_plain_buff;

			mac_addr = ether_aton(buff_ptr);

			if (!mac_addr)
				goto print_plain_buff;

			bat_host = bat_hosts_find_by_mac((char *)mac_addr);

			if (!bat_host)
				goto print_plain_buff;

			if (read_opt & LOG_MODE)
				printf("%s", bat_host->name);
			else
				/* keep table format */
				printf("%17s", bat_host->name);

			if (extra_char != '\0')
				printf("%c", extra_char);

			printf(" ");
			goto written;

print_plain_buff:
			printf("%s ", buff_ptr);

written:
			buff_ptr = space_ptr + 1;
		}

		printf("%s", buff_ptr);
	}

	if (read_opt & CONT_READ) {
		sleep(1);
		goto read;
	}

	if (read_opt & CLR_CONT_READ) {
		if (fp)
			fclose(fp);
		sleep(1);
		goto open;
	}

	res = EXIT_SUCCESS;

out:
	if (fp)
		fclose(fp);

	if (read_opt & USE_BAT_HOSTS)
		bat_hosts_free();

	return res;
}

int write_file(char *dir, char *fname, char *arg1, char *arg2)
{
	int fd = 0, res = EXIT_FAILURE;
	char full_path[500];
	ssize_t write_len;

	if (strstr(dir, "/proc/")) {
		if (check_proc_dir(dir) != EXIT_SUCCESS)
			goto out;
	} else if (strstr(dir, "/sys/")) {
		if (check_sys_dir(dir) != EXIT_SUCCESS)
			goto out;
	}

	strncpy(full_path, dir, strlen(dir));
	full_path[strlen(dir)] = '\0';
	strncat(full_path, fname, sizeof(full_path) - strlen(full_path));

	fd = open(full_path, O_WRONLY);

	if (fd < 0) {
		printf("Error - can't open file '%s': %s\n", full_path, strerror(errno));
		goto out;
	}

	if (arg2)
		write_len = dprintf(fd, "%s %s", arg1, arg2);
	else
		write_len = write(fd, arg1, strlen(arg1) + 1);

	if (write_len < 0) {
		printf("Error - can't write to file '%s': %s\n", full_path, strerror(errno));
		goto out;
	}

	res = EXIT_SUCCESS;

out:
	if (fd)
		close(fd);
	return res;
}

char *strchr_anyof(const char *s, const char *n)
{
	char *cur, *first = NULL;
	size_t i, len;

	if (s == NULL || n == NULL)
		return first;

	len = strlen(n);
	for (i = 0; i < len; i++) {
		cur = strchr(s, n[i]);
		if (cur != NULL && (cur < first || first == NULL))
			first = cur;
	}

	return first;
}