client/src/config.c

   1 /*
   2  *  tunnel6
   3  *  Copyright (C) 2010  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   4  *
   5  *  This program is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <stdio.h>
  23 #include "config.h"
  24 #include "defaults.h"
  25
  26 config_t config;                /* structure with config values */
  27
  28 int config_parse (char *var, char *val)
  29 {
  30         if (!strcasecmp (var, CONFIG_VAR_NAME)) {
  31                 config.name = strdup (val);
  32                 return 0;
  33         }
  34
  35         if (!strcasecmp (var, CONFIG_VAR_PWD)) {
  36                 config.pwd = strdup (val);
  37                 return 0;
  38         }
  39
  40         if (!strcasecmp (var, CONFIG_VAR_SERVER)) {
  41                 config.server = strdup (val);
  42                 return 0;
  43         }
  44
  45         if (!strcasecmp (var, CONFIG_VAR_PORT)) {
  46                 config.port = (unsigned short) atoi (strdup (val));
  47                 return 0;
  48         }
  49
  50         return -1;
  51 }
  52
  53 /* load config file */
  54 int config_load (char *filename)
  55 {
  56         unsigned l, line = 0;
  57         char *buffer, *c;
  58         char var[256];
  59         char val[256];
  60
  61         /* open specified file */
  62         FILE *fp = fopen (filename, "r");
  63
  64         if (!fp) {
  65                 printf ("> WARNING -> config file '%s' not found\n", DEFAULT_CONFIG_PATH);
  66                 return -1;
  67         }
  68
  69         buffer = (char *) calloc (600, sizeof (char));
  70
  71         if (!buffer)
  72                 return -1;
  73
  74         while (!feof (fp)) {
  75                 /* read line */
  76                 char *r = fgets (buffer, 600, fp);
  77
  78                 if (!r)
  79                         continue;
  80
  81                 line ++;
  82
  83                 l = strlen (buffer);
  84
  85                 if (l < 8)
  86                         continue;
  87
  88                 if (buffer[l - 1] == '\n')
  89                         buffer[l -- - 1] = '\0';
  90
  91                 /* move to first valid letter */
  92                 for (c = buffer; *c && *c == ' '; c ++);
  93
  94                 /* allow comments */
  95                 if (*c == '#')
  96                         continue;
  97
  98                 /* parse line */
  99                 sscanf (c, "%s %s", var, val);
 100
 101                 config_parse (var, val);
 102
 103                 /* clear line */
 104                 memset (buffer, 0, l);
 105         }
 106
 107         free (buffer);
 108         fclose (fp);
 109
 110         return 0;
 111 }
 112
 113 int config_init ()
 114 {
 115         memset (&config, 0, sizeof (config_t));
 116
 117         int ret = config_load (DEFAULT_CONFIG_PATH);
 118
 119         if (!ret && (!config.name || !config.pwd || !config.server)) {
 120                 printf ("ERROR -> config file is not valid !\nPlease rewrite " DEFAULT_CONFIG_PATH " in this way:\n\n"
 121                         "\tname YOURNAME\n"
 122                         "\tpassword YOURPASSWORD\n"
 123                         "\tserver TUNNELSERVER\n"
 124                         "\tport 6060\n");
 125
 126                 return -1;
 127         }
 128
 129         return ret;
 130 }