plugins/check_mrtgtraf.c

   1 /*****************************************************************************
   2 *
   3 * Nagios check_mrtgtraf plugin
   4 *
   5 * License: GPL
   6 * Copyright (c) 1999-2007 Nagios Plugins Development Team
   7 *
   8 * Description:
   9 *
  10 * This file contains the check_mtrgtraf plugin
  11 *
  12 * This plugin will check the incoming/outgoing transfer rates of a router
  13 * switch, etc recorded in an MRTG log.
  14 *
  15 *
  16 * This program is free software: you can redistribute it and/or modify
  17 * it under the terms of the GNU General Public License as published by
  18 * the Free Software Foundation, either version 3 of the License, or
  19 * (at your option) any later version.
  20 *
  21 * This program is distributed in the hope that it will be useful,
  22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24 * GNU General Public License for more details.
  25 *
  26 * You should have received a copy of the GNU General Public License
  27 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  28 *
  29 *
  30 *****************************************************************************/
  31
  32 #include "common.h"
  33 #include "utils.h"
  34
  35 const char *progname = "check_mrtgtraf";
  36 const char *copyright = "1999-2007";
  37 const char *email = "nagiosplug-devel@lists.sourceforge.net";
  38
  39 int process_arguments (int, char **);
  40 int validate_arguments (void);
  41 void print_help(void);
  42 void print_usage(void);
  43
  44 char *log_file = NULL;
  45 int expire_minutes = -1;
  46 int use_average = TRUE;
  47 unsigned long incoming_warning_threshold = 0L;
  48 unsigned long incoming_critical_threshold = 0L;
  49 unsigned long outgoing_warning_threshold = 0L;
  50 unsigned long outgoing_critical_threshold = 0L;
  51
  52
  53 int
  54 main (int argc, char **argv)
  55 {
  56         int result = STATE_OK;
  57         FILE *fp;
  58         int line;
  59         char input_buffer[MAX_INPUT_BUFFER];
  60         char *temp_buffer;
  61         time_t current_time;
  62         char *error_message;
  63         time_t timestamp = 0L;
  64         unsigned long average_incoming_rate = 0L;
  65         unsigned long average_outgoing_rate = 0L;
  66         unsigned long maximum_incoming_rate = 0L;
  67         unsigned long maximum_outgoing_rate = 0L;
  68         unsigned long incoming_rate = 0L;
  69         unsigned long outgoing_rate = 0L;
  70         double adjusted_incoming_rate = 0.0;
  71         double adjusted_outgoing_rate = 0.0;
  72         char incoming_speed_rating[8];
  73         char outgoing_speed_rating[8];
  74
  75         setlocale (LC_ALL, "");
  76         bindtextdomain (PACKAGE, LOCALEDIR);
  77         textdomain (PACKAGE);
  78
  79         /* Parse extra opts if any */
  80         argv=np_extra_opts (&argc, argv, progname);
  81
  82         if (process_arguments (argc, argv) == ERROR)
  83                 usage4 (_("Could not parse arguments"));
  84
  85         /* open the MRTG log file for reading */
  86         fp = fopen (log_file, "r");
  87         if (fp == NULL)
  88                 usage4 (_("Unable to open MRTG log file"));
  89
  90         line = 0;
  91         while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, fp)) {
  92
  93                 line++;
  94
  95                 /* skip the first line of the log file */
  96                 if (line == 1)
  97                         continue;
  98
  99                 /* break out of read loop */
 100                 /* if we've passed the number of entries we want to read */
 101                 if (line > 2)
 102                         break;
 103
 104                 /* grab the timestamp */
 105                 temp_buffer = strtok (input_buffer, " ");
 106                 timestamp = strtoul (temp_buffer, NULL, 10);
 107
 108                 /* grab the average incoming transfer rate */
 109                 temp_buffer = strtok (NULL, " ");
 110                 average_incoming_rate = strtoul (temp_buffer, NULL, 10);
 111
 112                 /* grab the average outgoing transfer rate */
 113                 temp_buffer = strtok (NULL, " ");
 114                 average_outgoing_rate = strtoul (temp_buffer, NULL, 10);
 115
 116                 /* grab the maximum incoming transfer rate */
 117                 temp_buffer = strtok (NULL, " ");
 118                 maximum_incoming_rate = strtoul (temp_buffer, NULL, 10);
 119
 120                 /* grab the maximum outgoing transfer rate */
 121                 temp_buffer = strtok (NULL, " ");
 122                 maximum_outgoing_rate = strtoul (temp_buffer, NULL, 10);
 123         }
 124
 125         /* close the log file */
 126         fclose (fp);
 127
 128         /* if we couldn't read enough data, return an unknown error */
 129         if (line <= 2)
 130                 usage4 (_("Unable to process MRTG log file"));
 131
 132         /* make sure the MRTG data isn't too old */
 133         time (&current_time);
 134         if ((expire_minutes > 0) &&
 135             (current_time - timestamp) > (expire_minutes * 60))
 136                 die (STATE_WARNING,     _("MRTG data has expired (%d minutes old)\n"),
 137                      (int) ((current_time - timestamp) / 60));
 138
 139         /* else check the incoming/outgoing rates */
 140         if (use_average == TRUE) {
 141                 incoming_rate = average_incoming_rate;
 142                 outgoing_rate = average_outgoing_rate;
 143         }
 144         else {
 145                 incoming_rate = maximum_incoming_rate;
 146                 outgoing_rate = maximum_outgoing_rate;
 147         }
 148
 149         /* report incoming traffic in Bytes/sec */
 150         if (incoming_rate < 1024) {
 151                 strcpy (incoming_speed_rating, "B/s");
 152                 adjusted_incoming_rate = (double) incoming_rate;
 153         }
 154
 155         /* report incoming traffic in KBytes/sec */
 156         else if (incoming_rate < (1024 * 1024)) {
 157                 strcpy (incoming_speed_rating, "KB/s");
 158                 adjusted_incoming_rate = (double) (incoming_rate / 1024.0);
 159         }
 160
 161         /* report incoming traffic in MBytes/sec */
 162         else {
 163                 strcpy (incoming_speed_rating, "MB/s");
 164                 adjusted_incoming_rate = (double) (incoming_rate / 1024.0 / 1024.0);
 165         }
 166
 167         /* report outgoing traffic in Bytes/sec */
 168         if (outgoing_rate < 1024) {
 169                 strcpy (outgoing_speed_rating, "B/s");
 170                 adjusted_outgoing_rate = (double) outgoing_rate;
 171         }
 172
 173         /* report outgoing traffic in KBytes/sec */
 174         else if (outgoing_rate < (1024 * 1024)) {
 175                 strcpy (outgoing_speed_rating, "KB/s");
 176                 adjusted_outgoing_rate = (double) (outgoing_rate / 1024.0);
 177         }
 178
 179         /* report outgoing traffic in MBytes/sec */
 180         else {
 181                 strcpy (outgoing_speed_rating, "MB/s");
 182                 adjusted_outgoing_rate = (double) (outgoing_rate / 1024.0 / 1024.0);
 183         }
 184
 185         if (incoming_rate > incoming_critical_threshold
 186                         || outgoing_rate > outgoing_critical_threshold) {
 187                 result = STATE_CRITICAL;
 188         }
 189         else if (incoming_rate > incoming_warning_threshold
 190                                          || outgoing_rate > outgoing_warning_threshold) {
 191                 result = STATE_WARNING;
 192         }
 193
 194         asprintf (&error_message, _("%s. In = %0.1f %s, %s. Out = %0.1f %s|%s %s\n"),
 195                   (use_average == TRUE) ? _("Avg") : _("Max"), adjusted_incoming_rate,
 196                   incoming_speed_rating, (use_average == TRUE) ? _("Avg") : _("Max"),
 197                   adjusted_outgoing_rate, outgoing_speed_rating,
 198                   fperfdata("in", adjusted_incoming_rate, incoming_speed_rating,
 199                            (int)incoming_warning_threshold, incoming_warning_threshold,
 200                            (int)incoming_critical_threshold, incoming_critical_threshold,
 201                            TRUE, 0, FALSE, 0),
 202                   fperfdata("in", adjusted_outgoing_rate, outgoing_speed_rating,
 203                            (int)outgoing_warning_threshold, outgoing_warning_threshold,
 204                            (int)outgoing_critical_threshold, outgoing_critical_threshold,
 205                            TRUE, 0, FALSE, 0));
 206
 207         printf (_("Traffic %s - %s\n"), state_text(result), error_message);
 208
 209         return result;
 210 }
 211
 212
 213
 214 /* process command-line arguments */
 215 int
 216 process_arguments (int argc, char **argv)
 217 {
 218         int c;
 219
 220         int option = 0;
 221         static struct option longopts[] = {
 222                 {"filename", required_argument, 0, 'F'},
 223                 {"expires", required_argument, 0, 'e'},
 224                 {"aggregation", required_argument, 0, 'a'},
 225                 {"critical", required_argument, 0, 'c'},
 226                 {"warning", required_argument, 0, 'w'},
 227                 {"version", no_argument, 0, 'V'},
 228                 {"help", no_argument, 0, 'h'},
 229                 {0, 0, 0, 0}
 230         };
 231
 232         if (argc < 2)
 233                 return ERROR;
 234
 235         for (c = 1; c < argc; c++) {
 236                 if (strcmp ("-to", argv[c]) == 0)
 237                         strcpy (argv[c], "-t");
 238                 else if (strcmp ("-wt", argv[c]) == 0)
 239                         strcpy (argv[c], "-w");
 240                 else if (strcmp ("-ct", argv[c]) == 0)
 241                         strcpy (argv[c], "-c");
 242         }
 243
 244         while (1) {
 245                 c = getopt_long (argc, argv, "hVF:e:a:c:w:", longopts, &option);
 246
 247                 if (c == -1 || c == EOF)
 248                         break;
 249
 250                 switch (c) {
 251                 case 'F':                                                                       /* input file */
 252                         log_file = optarg;
 253                         break;
 254                 case 'e':                                                                       /* expiration time */
 255                         expire_minutes = atoi (optarg);
 256                         break;
 257                 case 'a':                                                                       /* aggregation (AVE or MAX) */
 258                         if (!strcmp (optarg, "MAX"))
 259                                 use_average = FALSE;
 260                         else
 261                                 use_average = TRUE;
 262                         break;
 263                 case 'c':                                                                       /* warning threshold */
 264                         sscanf (optarg, "%lu,%lu", &incoming_critical_threshold,
 265                                                         &outgoing_critical_threshold);
 266                         break;
 267                 case 'w':                                                                       /* critical threshold */
 268                         sscanf (optarg, "%lu,%lu", &incoming_warning_threshold,
 269                                                         &outgoing_warning_threshold);
 270                         break;
 271                 case 'V':                                                                       /* version */
 272                         print_revision (progname, NP_VERSION);
 273                         exit (STATE_OK);
 274                 case 'h':                                                                       /* help */
 275                         print_help ();
 276                         exit (STATE_OK);
 277                 case '?':                                                                       /* help */
 278                         usage5 ();
 279                 }
 280         }
 281
 282         c = optind;
 283         if (argc > c && log_file == NULL) {
 284                 log_file = argv[c++];
 285         }
 286
 287         if (argc > c && expire_minutes == -1) {
 288                 expire_minutes = atoi (argv[c++]);
 289         }
 290
 291         if (argc > c && strcmp (argv[c], "MAX") == 0) {
 292                 use_average = FALSE;
 293                 c++;
 294         }
 295         else if (argc > c && strcmp (argv[c], "AVG") == 0) {
 296                 use_average = TRUE;
 297                 c++;
 298         }
 299
 300         if (argc > c && incoming_warning_threshold == 0) {
 301                 incoming_warning_threshold = strtoul (argv[c++], NULL, 10);
 302         }
 303
 304         if (argc > c && incoming_critical_threshold == 0) {
 305                 incoming_critical_threshold = strtoul (argv[c++], NULL, 10);
 306         }
 307
 308         if (argc > c && outgoing_warning_threshold == 0) {
 309                 outgoing_warning_threshold = strtoul (argv[c++], NULL, 10);
 310         }
 311
 312         if (argc > c && outgoing_critical_threshold == 0) {
 313                 outgoing_critical_threshold = strtoul (argv[c++], NULL, 10);
 314         }
 315
 316         return validate_arguments ();
 317 }
 318
 319
 320 int
 321 validate_arguments (void)
 322 {
 323         return OK;
 324 }
 325
 326
 327 void
 328 print_help (void)
 329 {
 330         print_revision (progname, NP_VERSION);
 331
 332         printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
 333         printf (COPYRIGHT, copyright, email);
 334
 335         printf ("%s\n", _("This plugin will check the incoming/outgoing transfer rates of a router,"));
 336   printf ("%s\n", _("switch, etc recorded in an MRTG log.  If the newest log entry is older"));
 337   printf ("%s\n", _("than <expire_minutes>, a WARNING status is returned. If either the"));
 338   printf ("%s\n", _("incoming or outgoing rates exceed the <icl> or <ocl> thresholds (in"));
 339   printf ("%s\n", _("Bytes/sec), a CRITICAL status results.  If either of the rates exceed"));
 340   printf ("%s\n", _("the <iwl> or <owl> thresholds (in Bytes/sec), a WARNING status results."));
 341
 342   printf ("\n\n");
 343
 344         print_usage ();
 345
 346         printf (_(UT_HELP_VRSN));
 347         printf (_(UT_EXTRA_OPTS));
 348
 349         printf (" %s\n", "-F, --filename=STRING");
 350   printf ("    %s\n", _("File to read log from"));
 351   printf (" %s\n", "-e, --expires=INTEGER");
 352   printf ("    %s\n", _("Minutes after which log expires"));
 353   printf (" %s\n", "-a, --aggregation=(AVG|MAX)");
 354   printf ("    %s\n", _("Test average or maximum"));
 355   printf (" %s\n", "-w, --warning");
 356   printf ("    %s\n", _("Warning threshold pair <incoming>,<outgoing>"));
 357   printf (" %s\n", "-c, --critical");
 358   printf ("    %s\n", _("Critical threshold pair <incoming>,<outgoing>"));
 359
 360   printf ("\n");
 361         printf ("%s\n", _("Notes:"));
 362   printf (" %s\n", _("- MRTG stands for Multi Router Traffic Grapher. It can be downloaded from"));
 363   printf (" %s\n", "  http://ee-staff.ethz.ch/~oetiker/webtools/mrtg/mrtg.html");
 364   printf (" %s\n", _("- While MRTG can monitor things other than traffic rates, this"));
 365   printf (" %s\n", _("  plugin probably won't work with much else without modification."));
 366   printf (" %s\n", _("- The calculated i/o rates are a little off from what MRTG actually"));
 367   printf (" %s\n", _("  reports.  I'm not sure why this is right now, but will look into it"));
 368   printf (" %s\n", _("  for future enhancements of this plugin."));
 369 #ifdef NP_EXTRA_OPTS
 370         printf (" -%s", _(UT_EXTRA_OPTS_NOTES));
 371 #endif
 372
 373         printf (_(UT_SUPPORT));
 374 }
 375
 376
 377
 378 void
 379 print_usage (void)
 380 {
 381         printf (_("Usage"));
 382   printf (" %s -F <log_file> -a <AVG | MAX> -w <warning_pair>\n",progname);
 383   printf ("-c <critical_pair> [-e expire_minutes]\n");
 384 }