config.cxx

   1 /*
   2  * inoclam - Inotify+ClamAV virus scanner
   3  * Copyright (C) 2007 Vermont Department of Taxes
   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 2 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, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  *
  19  * Contributor(s):
  20  *   Tom Cort <tom.cort@state.vt.us>
  21  *   Matt Gagne <matt.gagne@state.vt.us>
  22  */
  23
  24 #include <confuse.h>
  25 #include <libdaemon/dlog.h>
  26 #include <unistd.h>
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <string.h>
  30 #include <strings.h>
  31 #include <errno.h>
  32 #include <unistd.h>
  33 #include <stdlib.h>
  34 #include <stdio.h>
  35
  36 #include "config.hxx"
  37 #include "clam.hxx"
  38 #include "inotify.hxx"
  39 #include "smtp.hxx"
  40
  41 /**
  42  * Default Constructor
  43  */
  44 config::config()
  45 {
  46         virus_removal_enabled = cfg_false;
  47         smtp_enabled_virus = cfg_true;
  48         smtp_enabled_file = cfg_false;
  49         watch_dir = NULL;
  50         smtp_host = NULL;
  51         smtp_port = 0;
  52         smtp_to = NULL;
  53         smtp_from = NULL;
  54         smtp_subject_virus = NULL;
  55         smtp_subject_file = NULL;
  56 }
  57
  58 /**
  59  * Checks if the configuration file exists as a regular file.
  60  * @return Returns 1 if the file exists and is regular, else 0.
  61  */
  62 int config::config_file_exists()
  63 {
  64         struct stat s;
  65
  66         /* No config file defined - NULL Pointer Check */
  67         if (!DEFAULT_CONFIGFILE) {
  68                 return 0;
  69         }
  70
  71         /* File exists? */
  72         if (stat(DEFAULT_CONFIGFILE, &s) < 0) {
  73                 return 0;
  74         }
  75
  76         /* File is a regular file? */
  77         if (!S_ISREG(s.st_mode)) {
  78                 return 0;
  79         }
  80
  81         return 1;
  82 }
  83
  84 /**
  85  * Release any resources that hold configuration information.
  86  * This function effectively resets all configurable values.
  87  * It should be called at the end of the program.
  88  */
  89 void config::config_free()
  90 {
  91         if (watch_dir != NULL) {
  92                 free(watch_dir);
  93                 watch_dir = NULL;
  94         }
  95
  96         virus_removal_enabled = cfg_true;
  97
  98         smtp_enabled_virus = cfg_true;
  99
 100         smtp_enabled_file = cfg_true;
 101
 102         if (smtp_host != NULL) {
 103                 free(smtp_host);
 104                 smtp_host = NULL;
 105         }
 106
 107         smtp_port = 0;
 108
 109         if (smtp_to != NULL) {
 110                 free(smtp_to);
 111                 smtp_to = NULL;
 112         }
 113
 114         if (smtp_from != NULL) {
 115                 free(smtp_from);
 116                 smtp_from = NULL;
 117         }
 118
 119         if (smtp_subject_virus != NULL) {
 120                 free(smtp_subject_virus);
 121                 smtp_subject_virus = NULL;
 122         }
 123
 124         if (smtp_subject_file != NULL) {
 125                 free(smtp_subject_file);
 126                 smtp_subject_file = NULL;
 127         }
 128
 129 }
 130
 131 /**
 132  * Examines each value of the current configuration.
 133  * If a value was not set, it is set to the default.
 134  */
 135 void config::config_with_defaults()
 136 {
 137         if (watch_dir == NULL) {
 138                 watch_dir = strdup(WATCH_DIR);
 139         }
 140
 141         if (smtp_host == NULL) {
 142                 smtp_host = strdup(SMTP_HOST);
 143         }
 144
 145         if (smtp_port == 0) {
 146                 smtp_port = SMTP_PORT;
 147         }
 148
 149         if (smtp_to == NULL) {
 150                 smtp_to = strdup(SMTP_TO);
 151         }
 152
 153         if (smtp_from == NULL) {
 154                 smtp_from = strdup(SMTP_FROM);
 155         }
 156
 157         if (smtp_subject_virus == NULL) {
 158                 smtp_subject_virus = strdup(SMTP_SUBJECT_VIRUS);
 159         }
 160
 161         if (smtp_subject_file == NULL) {
 162                 smtp_subject_file = strdup(SMTP_SUBJECT_FILE);
 163         }
 164
 165 }
 166
 167 /**
 168  * Parses an inoclam.conf configuration file.
 169  */
 170 void config::parse()
 171 {
 172         int rc;
 173
 174         config_free();
 175
 176         cfg_t *cfg;
 177         cfg_opt_t opts[] = {
 178                 CFG_SIMPLE_STR("watch_dir", &watch_dir),
 179                 CFG_SIMPLE_BOOL("virus_removal_enabled", &virus_removal_enabled),
 180                 CFG_SIMPLE_BOOL("smtp_enabled_file", &smtp_enabled_file),
 181                 CFG_SIMPLE_BOOL("smtp_enabled_virus", &smtp_enabled_virus),
 182                 CFG_SIMPLE_STR("smtp_host", &smtp_host),
 183                 CFG_SIMPLE_INT("smtp_port", &smtp_port),
 184                 CFG_SIMPLE_STR("smtp_to", &smtp_to),
 185                 CFG_SIMPLE_STR("smtp_from", &smtp_from),
 186                 CFG_SIMPLE_STR("smtp_subject_virus", &smtp_subject_virus),
 187                 CFG_SIMPLE_STR("smtp_subject_file", &smtp_subject_file),
 188                 CFG_END()
 189         };
 190
 191         cfg = NULL;
 192
 193         if (!config_file_exists()) {
 194                 daemon_log(LOG_INFO, "Configuration file '%s' not found.", DEFAULT_CONFIGFILE);
 195                 config_with_defaults();
 196                 return;
 197         }
 198
 199         cfg = cfg_init(opts, 0);
 200         if (!cfg) {
 201                 daemon_log(LOG_ERR, "cfg_init failed!");
 202                 config_with_defaults();
 203                 return;
 204         }
 205
 206         rc = cfg_parse(cfg, DEFAULT_CONFIGFILE);
 207         if (rc == CFG_PARSE_ERROR) {
 208                 daemon_log(LOG_ERR, "parser error '%s'", DEFAULT_CONFIGFILE);
 209         }
 210
 211         if (cfg) {
 212                 cfg_free(cfg);
 213                 cfg = NULL;
 214         }
 215
 216         config_with_defaults();
 217 }
 218
 219 cfg_bool_t config::isSMTPEnabledFile()
 220 {
 221         return smtp_enabled_file;
 222 }
 223
 224 cfg_bool_t config::isSMTPEnabledVirus()
 225 {
 226         return smtp_enabled_virus;
 227 }
 228
 229 cfg_bool_t config::getVirusRemovalEnabled()
 230 {
 231         return virus_removal_enabled;
 232 }
 233
 234 char *config::getHost()
 235 {
 236         return smtp_host;
 237 }
 238
 239 int config::getPort()
 240 {
 241         return smtp_port;
 242 }
 243
 244 char *config::getTo()
 245 {
 246         return smtp_to;
 247 }
 248
 249 char *config::getFrom()
 250 {
 251         return smtp_from;
 252 }
 253
 254 char *config::getVirusSubject()
 255 {
 256         return smtp_subject_virus;
 257 }
 258
 259 char *config::getFileSubject()
 260 {
 261         return smtp_subject_file;
 262 }
 263
 264 char *config::getWatchDir()
 265 {
 266         return watch_dir;
 267 }
 268
 269 /**
 270  * Deconstructor
 271  */
 272 config::~config()
 273 {
 274         config_free();
 275 }