plugins/check_udp.c

   1 /******************************************************************************
   2
   3  This program is free software; you can redistribute it and/or modify
   4  it under the terms of the GNU General Public License as published by
   5  the Free Software Foundation; either version 2 of the License, or
   6  (at your option) any later version.
   7
   8  This program is distributed in the hope that it will be useful,
   9  but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  GNU General Public License for more details.
  12
  13  You should have received a copy of the GNU General Public License
  14  along with this program; if not, write to the Free Software
  15  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  16
  17 *****************************************************************************/
  18
  19 const char *progname = "check_udp";
  20 const char *revision = "$Revision$";
  21 const char *copyright = "1999-2002";
  22 const char *email = "nagiosplug-devel@lists.sourceforge.net";
  23
  24 #include "common.h"
  25 #include "netutils.h"
  26 #include "utils.h"
  27
  28 int process_arguments (int, char **);
  29 void print_help (void);
  30 void print_usage (void);
  31
  32 int warning_time = 0;
  33 int check_warning_time = FALSE;
  34 int critical_time = 0;
  35 int check_critical_time = FALSE;
  36 int verbose = FALSE;
  37 int server_port = 0;
  38 char *server_address = NULL;
  39 char *server_expect = NULL;
  40 char *server_send;
  41
  42 int
  43 main (int argc, char **argv)
  44 {
  45         int result;
  46         char recv_buffer[MAX_INPUT_BUFFER];
  47
  48         setlocale (LC_ALL, "");
  49         bindtextdomain (PACKAGE, LOCALEDIR);
  50         textdomain (PACKAGE);
  51
  52         if (process_arguments (argc, argv) == ERROR)
  53                 usage ("\n");
  54
  55         /* initialize alarm signal handling */
  56         signal (SIGALRM, socket_timeout_alarm_handler);
  57
  58         /* set socket timeout */
  59         alarm (socket_timeout);
  60
  61         time (&start_time);
  62         result = process_udp_request (server_address, server_port, server_send,
  63                         recv_buffer, MAX_INPUT_BUFFER - 1);
  64         time (&end_time);
  65
  66         if (result != STATE_OK) {
  67                 printf ("No response from host on port %d\n", server_port);
  68                 result = STATE_CRITICAL;
  69         }
  70
  71         else {
  72
  73                 /* check to see if we got the response we wanted */
  74                 if (server_expect) {
  75                         if (!strstr (recv_buffer, server_expect)) {
  76                                 printf ("Invalid response received from host on port %d\n",
  77                                                                 server_port);
  78                                 result = STATE_CRITICAL;
  79                         }
  80                 }
  81         }
  82
  83         /* we connected, so close connection before exiting */
  84         if (result == STATE_OK) {
  85
  86                 if (check_critical_time == TRUE
  87                                 && (end_time - start_time) > critical_time) result = STATE_CRITICAL;
  88                 else if (check_warning_time == TRUE
  89                                                  && (end_time - start_time) > warning_time) result =
  90                                 STATE_WARNING;
  91
  92                 printf (_("Connection %s on port %d - %d second response time\n"),
  93                                                 (result == STATE_OK) ? _("accepted") : _("problem"), server_port,
  94                                                 (int) (end_time - start_time));
  95         }
  96
  97         /* reset the alarm */
  98         alarm (0);
  99
 100         return result;
 101 }
 102
 103
 104
 105
 106 /* process command-line arguments */
 107 int
 108 process_arguments (int argc, char **argv)
 109 {
 110         int c;
 111
 112         int option = 0;
 113         static struct option longopts[] = {
 114                 {"hostname", required_argument, 0, 'H'},
 115                 {"critical", required_argument, 0, 'c'},
 116                 {"warning", required_argument, 0, 'w'},
 117                 {"timeout", required_argument, 0, 't'},
 118                 {"port", required_argument, 0, 'p'},
 119                 {"expect", required_argument, 0, 'e'},
 120                 {"send", required_argument, 0, 's'},
 121                 {"verbose", no_argument, 0, 'v'},
 122                 {"version", no_argument, 0, 'V'},
 123                 {"help", no_argument, 0, 'h'},
 124                 {0, 0, 0, 0}
 125         };
 126
 127         if (argc < 2)
 128                 usage ("\n");
 129
 130         for (c = 1; c < argc; c++) {
 131                 if (strcmp ("-to", argv[c]) == 0)
 132                         strcpy (argv[c], "-t");
 133                 else if (strcmp ("-wt", argv[c]) == 0)
 134                         strcpy (argv[c], "-w");
 135                 else if (strcmp ("-ct", argv[c]) == 0)
 136                         strcpy (argv[c], "-c");
 137         }
 138
 139         while (1) {
 140                 c = getopt_long (argc, argv, "+hVvH:e:s:c:w:t:p:", longopts, &option);
 141
 142                 if (c == -1 || c == EOF || c == 1)
 143                         break;
 144
 145                 switch (c) {
 146                 case '?':                                                                       /* print short usage statement if args not parsable */
 147                         printf (_("%s: Unknown argument: %s\n\n"), progname, optarg);
 148                         print_usage ();
 149                         exit (STATE_UNKNOWN);
 150                 case 'h':                                                                       /* help */
 151                         print_help ();
 152                         exit (STATE_OK);
 153                 case 'V':                                                                       /* version */
 154                         print_revision (progname, revision);
 155                         exit (STATE_OK);
 156                 case 'v':                                                                       /* verbose mode */
 157                         verbose = TRUE;
 158                         break;
 159                 case 'H':                                                                       /* hostname */
 160                         if (is_host (optarg) == FALSE)
 161                                 usage (_("Invalid host name/address\n"));
 162                         server_address = optarg;
 163                         break;
 164                 case 'c':                                                                       /* critical */
 165                         if (!is_intnonneg (optarg))
 166                                 usage (_("Critical threshold must be a nonnegative integer\n"));
 167                         else
 168                                 critical_time = atoi (optarg);
 169                         check_critical_time = TRUE;
 170                         break;
 171                 case 'w':                                                                       /* warning */
 172                         if (!is_intnonneg (optarg))
 173                                 usage (_("Warning threshold must be a nonnegative integer\n"));
 174                         else
 175                                 warning_time = atoi (optarg);
 176                         check_warning_time = TRUE;
 177                         break;
 178                 case 't':                                                                       /* timeout */
 179                         if (!is_intnonneg (optarg))
 180                                 usage (_("Timeout interval must be a nonnegative integer\n"));
 181                         else
 182                                 socket_timeout = atoi (optarg);
 183                         break;
 184                 case 'p':                                                                       /* port */
 185                         if (!is_intnonneg (optarg))
 186                                 usage (_("Server port must be a nonnegative integer\n"));
 187                         else
 188                                 server_port = atoi (optarg);
 189                         break;
 190                 case 'e':                                                                       /* expect */
 191                         server_expect = optarg;
 192                         break;
 193                 case 's':                                                                       /* send */
 194                         server_send = optarg;
 195                         break;
 196                 }
 197         }
 198
 199         c = optind;
 200         if (server_address == NULL && c < argc && argv[c]) {
 201                 if (is_host (argv[c]) == FALSE)
 202                         usage (_("Invalid host name/address\n"));
 203                 server_address = argv[c++];
 204         }
 205
 206         if (server_address == NULL)
 207                 usage (_("Host name was not supplied\n"));
 208
 209         if (server_send == NULL)
 210                 server_send = strdup("");
 211
 212         return c;
 213 }
 214
 215
 216
 217
 218
 219 \f
 220 void
 221 print_help (void)
 222 {
 223         print_revision (progname, revision);
 224
 225         printf (_("Copyright (c) 1999 Ethan Galstad\n"));
 226         printf (_(COPYRIGHT), copyright, email);
 227
 228         printf (_("\
 229 This plugin tests an UDP connection with the specified host.\n\n"));
 230
 231         print_usage ();
 232
 233         printf (_(UT_HELP_VRSN));
 234
 235         printf (_(UT_HOST_PORT), 'p', "none");
 236
 237         printf (_("\
 238  -e, --expect=STRING <optional>\n\
 239     String to expect in first line of server response\n\
 240  -s, --send=STRING <optional>\n\
 241     String to send to the server when initiating the connection\n"));
 242
 243         printf (_(UT_WARN_CRIT));
 244
 245         printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
 246
 247         printf (_(UT_VERBOSE));
 248
 249         printf (_("\
 250 This plugin will attempt to connect to the specified port on the host.\n\
 251 Successful connects return STATE_OK, refusals and timeouts return\n\
 252 STATE_CRITICAL, other errors return STATE_UNKNOWN.\n\n"));
 253
 254         printf(_(UT_SUPPORT));
 255 }
 256
 257
 258
 259
 260 /* Original Command line:
 261    check_udp <host_address> [-p port] [-s send] [-e expect] \
 262    [-wt warn_time] [-ct crit_time] [-to to_sec] */
 263 void
 264 print_usage (void)
 265 {
 266         printf (_("\
 267 Usage: %s -H <host_address> [-p port] [-w warn_time] [-c crit_time]\n\
 268     [-e expect] [-s send] [-t to_sec] [-v]\n"), progname);
 269         printf (_(UT_HLP_VRS), progname, progname);
 270 }