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         if (process_arguments (argc, argv) == ERROR)
  49                 usage ("\n");
  50
  51         /* initialize alarm signal handling */
  52         signal (SIGALRM, socket_timeout_alarm_handler);
  53
  54         /* set socket timeout */
  55         alarm (socket_timeout);
  56
  57         time (&start_time);
  58         result = process_udp_request (server_address, server_port, server_send,
  59                         recv_buffer, MAX_INPUT_BUFFER - 1);
  60         time (&end_time);
  61
  62         if (result != STATE_OK) {
  63                 printf ("No response from host on port %d\n", server_port);
  64                 result = STATE_CRITICAL;
  65         }
  66
  67         else {
  68
  69                 /* check to see if we got the response we wanted */
  70                 if (server_expect) {
  71                         if (!strstr (recv_buffer, server_expect)) {
  72                                 printf ("Invalid response received from host on port %d\n",
  73                                                                 server_port);
  74                                 result = STATE_CRITICAL;
  75                         }
  76                 }
  77         }
  78
  79         /* we connected, so close connection before exiting */
  80         if (result == STATE_OK) {
  81
  82                 if (check_critical_time == TRUE
  83                                 && (end_time - start_time) > critical_time) result = STATE_CRITICAL;
  84                 else if (check_warning_time == TRUE
  85                                                  && (end_time - start_time) > warning_time) result =
  86                                 STATE_WARNING;
  87
  88                 printf (_("Connection %s on port %d - %d second response time\n"),
  89                                                 (result == STATE_OK) ? _("accepted") : _("problem"), server_port,
  90                                                 (int) (end_time - start_time));
  91         }
  92
  93         /* reset the alarm */
  94         alarm (0);
  95
  96         return result;
  97 }
  98
  99
 100
 101
 102 /* process command-line arguments */
 103 int
 104 process_arguments (int argc, char **argv)
 105 {
 106         int c;
 107
 108         int option = 0;
 109         static struct option longopts[] = {
 110                 {"hostname", required_argument, 0, 'H'},
 111                 {"critical", required_argument, 0, 'c'},
 112                 {"warning", required_argument, 0, 'w'},
 113                 {"timeout", required_argument, 0, 't'},
 114                 {"port", required_argument, 0, 'p'},
 115                 {"expect", required_argument, 0, 'e'},
 116                 {"send", required_argument, 0, 's'},
 117                 {"verbose", no_argument, 0, 'v'},
 118                 {"version", no_argument, 0, 'V'},
 119                 {"help", no_argument, 0, 'h'},
 120                 {0, 0, 0, 0}
 121         };
 122
 123         if (argc < 2)
 124                 usage ("\n");
 125
 126         for (c = 1; c < argc; c++) {
 127                 if (strcmp ("-to", argv[c]) == 0)
 128                         strcpy (argv[c], "-t");
 129                 else if (strcmp ("-wt", argv[c]) == 0)
 130                         strcpy (argv[c], "-w");
 131                 else if (strcmp ("-ct", argv[c]) == 0)
 132                         strcpy (argv[c], "-c");
 133         }
 134
 135         while (1) {
 136                 c = getopt_long (argc, argv, "+hVvH:e:s:c:w:t:p:", longopts, &option);
 137
 138                 if (c == -1 || c == EOF || c == 1)
 139                         break;
 140
 141                 switch (c) {
 142                 case '?':                                                                       /* print short usage statement if args not parsable */
 143                         printf (_("%s: Unknown argument: %s\n\n"), progname, optarg);
 144                         print_usage ();
 145                         exit (STATE_UNKNOWN);
 146                 case 'h':                                                                       /* help */
 147                         print_help ();
 148                         exit (STATE_OK);
 149                 case 'V':                                                                       /* version */
 150                         print_revision (progname, revision);
 151                         exit (STATE_OK);
 152                 case 'v':                                                                       /* verbose mode */
 153                         verbose = TRUE;
 154                         break;
 155                 case 'H':                                                                       /* hostname */
 156                         if (is_host (optarg) == FALSE)
 157                                 usage (_("Invalid host name/address\n"));
 158                         server_address = optarg;
 159                         break;
 160                 case 'c':                                                                       /* critical */
 161                         if (!is_intnonneg (optarg))
 162                                 usage (_("Critical threshold must be a nonnegative integer\n"));
 163                         else
 164                                 critical_time = atoi (optarg);
 165                         check_critical_time = TRUE;
 166                         break;
 167                 case 'w':                                                                       /* warning */
 168                         if (!is_intnonneg (optarg))
 169                                 usage (_("Warning threshold must be a nonnegative integer\n"));
 170                         else
 171                                 warning_time = atoi (optarg);
 172                         check_warning_time = TRUE;
 173                         break;
 174                 case 't':                                                                       /* timeout */
 175                         if (!is_intnonneg (optarg))
 176                                 usage (_("Timeout interval must be a nonnegative integer\n"));
 177                         else
 178                                 socket_timeout = atoi (optarg);
 179                         break;
 180                 case 'p':                                                                       /* port */
 181                         if (!is_intnonneg (optarg))
 182                                 usage (_("Server port must be a nonnegative integer\n"));
 183                         else
 184                                 server_port = atoi (optarg);
 185                         break;
 186                 case 'e':                                                                       /* expect */
 187                         server_expect = optarg;
 188                         break;
 189                 case 's':                                                                       /* send */
 190                         server_send = optarg;
 191                         break;
 192                 }
 193         }
 194
 195         c = optind;
 196         if (server_address == NULL && c < argc && argv[c]) {
 197                 if (is_host (argv[c]) == FALSE)
 198                         usage (_("Invalid host name/address\n"));
 199                 server_address = argv[c++];
 200         }
 201
 202         if (server_address == NULL)
 203                 usage (_("Host name was not supplied\n"));
 204
 205         if (server_send == NULL)
 206                 server_send = strdup("");
 207
 208         return c;
 209 }
 210
 211
 212
 213
 214
 215 \f
 216 void
 217 print_help (void)
 218 {
 219         print_revision (progname, revision);
 220
 221         printf (_("Copyright (c) 1999 Ethan Galstad\n"));
 222         printf (_(COPYRIGHT), copyright, email);
 223
 224         printf (_("\
 225 This plugin tests an UDP connection with the specified host.\n\n"));
 226
 227         print_usage ();
 228
 229         printf (_(UT_HELP_VRSN));
 230
 231         printf (_(UT_HOST_PORT), 'p', "none");
 232
 233         printf (_("\
 234  -e, --expect=STRING <optional>\n\
 235     String to expect in first line of server response\n\
 236  -s, --send=STRING <optional>\n\
 237     String to send to the server when initiating the connection\n"));
 238
 239         printf (_(UT_WARN_CRIT));
 240
 241         printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
 242
 243         printf (_(UT_VERBOSE));
 244
 245         printf (_("\
 246 This plugin will attempt to connect to the specified port on the host.\n\
 247 Successful connects return STATE_OK, refusals and timeouts return\n\
 248 STATE_CRITICAL, other errors return STATE_UNKNOWN.\n\n"));
 249
 250         printf(_(UT_SUPPORT));
 251 }
 252
 253
 254
 255
 256 /* Original Command line:
 257    check_udp <host_address> [-p port] [-s send] [-e expect] \
 258    [-wt warn_time] [-ct crit_time] [-to to_sec] */
 259 void
 260 print_usage (void)
 261 {
 262         printf (_("\
 263 Usage: %s -H <host_address> [-p port] [-w warn_time] [-c crit_time]\n\
 264     [-e expect] [-s send] [-t to_sec] [-v]\n"), progname);
 265         printf (_(UT_HLP_VRS), progname, progname);
 266 }