1 files changed, 315 insertions, 0 deletions

diff --git a/plugins/check_udp.c b/plugins/check_udp.c
new file mode 100644
index 0000000..d00ce9c
--- /dev/null
+++ b/plugins/check_udp.c
@@ -0,0 +1,315 @@
+/******************************************************************************
+*
+* CHECK_UDP.C
+*
+* Program: UDP port plugin for Nagios
+* License: GPL
+* Copyright (c) 1999 Ethan Galstad (nagios@nagios.org)
+*
+* Last Modified: $Date$
+*
+* Command line: CHECK_UDP <host_address> [-p port] [-s send] [-e expect] \
+*                          [-wt warn_time] [-ct crit_time] [-to to_sec]
+*
+* Description:
+*
+* This plugin will attempt to connect to the specified port
+* on the host.  Successul connects return STATE_OK, refusals
+* and timeouts return STATE_CRITICAL, other errors return
+* STATE_UNKNOWN.
+*
+* License Information:
+*
+* This program is free software; you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation; either version 2 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*
+*****************************************************************************/
+
+#include "config.h"
+#include "common.h"
+#include "netutils.h"
+#include "utils.h"
+
+#define PROGNAME "check_udp"
+
+int warning_time = 0;
+int check_warning_time = FALSE;
+int critical_time = 0;
+int check_critical_time = FALSE;
+
+int process_arguments (int, char **);
+int call_getopt (int, char **);
+void print_usage (void);
+void print_help (void);
+
+int verbose = FALSE;
+int server_port = 0;
+char *server_address = NULL;
+char *server_expect = NULL;
+char *server_send = NULL;
+
+int
+main (int argc, char **argv)
+{
+        int result;
+        char recv_buffer[MAX_INPUT_BUFFER];
+
+        if (process_arguments (argc, argv) == ERROR)
+                usage ("\n");
+
+        /* initialize alarm signal handling */
+        signal (SIGALRM, socket_timeout_alarm_handler);
+
+        /* set socket timeout */
+        alarm (socket_timeout);
+
+        time (&start_time);
+        result =
+                process_udp_request (server_address, server_port, server_send,
+                                                                                                 recv_buffer, MAX_INPUT_BUFFER - 1);
+        time (&end_time);
+
+        if (result != STATE_OK) {
+                printf ("No response from host on port %d\n", server_port);
+                result = STATE_CRITICAL;
+        }
+
+        else {
+
+                /* check to see if we got the response we wanted */
+                if (server_expect) {
+                        if (!strstr (recv_buffer, server_expect)) {
+                                printf ("Invalid response received from host on port %d\n",
+                                                                server_port);
+                                result = STATE_CRITICAL;
+                        }
+                }
+        }
+
+        /* we connected, so close connection before exiting */
+        if (result == STATE_OK) {
+
+                if (check_critical_time == TRUE
+                                && (end_time - start_time) > critical_time) result = STATE_CRITICAL;
+                else if (check_warning_time == TRUE
+                                                 && (end_time - start_time) > warning_time) result =
+                                STATE_WARNING;
+
+                printf ("Connection %s on port %d - %d second response time\n",
+                                                (result == STATE_OK) ? "accepted" : "problem", server_port,
+                                                (int) (end_time - start_time));
+        }
+
+        /* reset the alarm */
+        alarm (0);
+
+        return result;
+}
+
+
+
+
+/* process command-line arguments */
+int
+process_arguments (int argc, char **argv)
+{
+        int c;
+
+        if (argc < 2)
+                usage ("\n");
+
+        for (c = 1; c < argc; c++) {
+                if (strcmp ("-to", argv[c]) == 0)
+                        strcpy (argv[c], "-t");
+                else if (strcmp ("-wt", argv[c]) == 0)
+                        strcpy (argv[c], "-w");
+                else if (strcmp ("-ct", argv[c]) == 0)
+                        strcpy (argv[c], "-c");
+        }
+
+        c = 0;
+        while ((c += call_getopt (argc - c, &argv[c])) < argc) {
+
+                if (is_option (argv[c]))
+                        continue;
+
+                if (server_address == NULL) {
+                        if (argc > c) {
+                                if (is_host (argv[c]) == FALSE)
+                                        usage ("Invalid host name/address\n");
+                                server_address = argv[c];
+                        }
+                        else {
+                                usage ("Host name was not supplied\n");
+                        }
+                }
+        }
+
+        if (server_send == NULL)
+                server_send = strscpy (server_send, "");
+
+        return OK;
+}
+
+
+
+
+
+int
+call_getopt (int argc, char **argv)
+{
+        int c, i = 0;
+
+#ifdef HAVE_GETOPT_H
+        int option_index = 0;
+        static struct option long_options[] = {
+                {"hostname", required_argument, 0, 'H'},
+                {"critical", required_argument, 0, 'c'},
+                {"warning", required_argument, 0, 'w'},
+                {"timeout", required_argument, 0, 't'},
+                {"port", required_argument, 0, 'p'},
+                {"expect", required_argument, 0, 'e'},
+                {"send", required_argument, 0, 's'},
+                {"verbose", no_argument, 0, 'v'},
+                {"version", no_argument, 0, 'V'},
+                {"help", no_argument, 0, 'h'},
+                {0, 0, 0, 0}
+        };
+#endif
+
+        while (1) {
+#ifdef HAVE_GETOPT_H
+                c =
+                        getopt_long (argc, argv, "+hVvH:e:s:c:w:t:p:", long_options,
+                                                                         &option_index);
+#else
+                c = getopt (argc, argv, "+hVvH:e:s:c:w:t:p:");
+#endif
+
+                i++;
+
+                if (c == -1 || c == EOF || c == 1)
+                        break;
+
+                switch (c) {
+                case 'H':
+                case 'c':
+                case 'w':
+                case 't':
+                case 'p':
+                case 'e':
+                case 's':
+                        i++;
+                }
+
+                switch (c) {
+                case '?':                                                                       /* print short usage statement if args not parsable */
+                        printf ("%s: Unknown argument: %s\n\n", my_basename (argv[0]), optarg);
+                        print_usage ();
+                        exit (STATE_UNKNOWN);
+                case 'h':                                                                       /* help */
+                        print_help ();
+                        exit (STATE_OK);
+                case 'V':                                                                       /* version */
+                        print_revision (my_basename (argv[0]), "$Revision$");
+                        exit (STATE_OK);
+                case 'v':                                                                       /* verbose mode */
+                        verbose = TRUE;
+                        break;
+                case 'H':                                                                       /* hostname */
+                        if (is_host (optarg) == FALSE)
+                                usage ("Invalid host name/address\n");
+                        server_address = optarg;
+                        break;
+                case 'c':                                                                       /* critical */
+                        if (!is_intnonneg (optarg))
+                                usage ("Critical threshold must be a nonnegative integer\n");
+                        critical_time = atoi (optarg);
+                        check_critical_time = TRUE;
+                        break;
+                case 'w':                                                                       /* warning */
+                        if (!is_intnonneg (optarg))
+                                usage ("Warning threshold must be a nonnegative integer\n");
+                        warning_time = atoi (optarg);
+                        check_warning_time = TRUE;
+                        break;
+                case 't':                                                                       /* timeout */
+                        if (!is_intnonneg (optarg))
+                                usage ("Timeout interval must be a nonnegative integer\n");
+                        socket_timeout = atoi (optarg);
+                        break;
+                case 'p':                                                                       /* port */
+                        if (!is_intnonneg (optarg))
+                                usage ("Serevr port must be a nonnegative integer\n");
+                        server_port = atoi (optarg);
+                        break;
+                case 'e':                                                                       /* expect */
+                        server_expect = optarg;
+                        break;
+                case 's':                                                                       /* send */
+                        server_send = optarg;
+                        break;
+                }
+        }
+        return i;
+}
+
+
+
+
+
+void
+print_usage (void)
+{
+        printf
+                ("Usage: %s -H <host_address> [-p port] [-w warn_time] [-c crit_time]\n"
+                 "         [-e expect] [-s send] [-t to_sec] [-v]\n", PROGNAME);
+}
+
+
+
+
+
+void
+print_help (void)
+{
+        print_revision (PROGNAME, "$Revision$");
+        printf
+                ("Copyright (c) 1999 Ethan Galstad (nagios@nagios.org)\n\n"
+                 "This plugin tests an UDP connection with the specified host.\n\n");
+        print_usage ();
+        printf
+                ("Options:\n"
+                 " -H, --hostname=ADDRESS\n"
+                 "    Host name argument for servers using host headers (use numeric\n"
+                 "    address if possible to bypass DNS lookup).\n"
+                 " -p, --port=INTEGER\n"
+                 "    Port number\n"
+                 " -e, --expect=STRING <optional>\n"
+                 "    String to expect in first line of server response\n"
+                 " -s, --send=STRING <optional>\n"
+                 "    String to send to the server when initiating the connection\n"
+                 " -w, --warning=INTEGER <optional>\n"
+                 "    Response time to result in warning status (seconds)\n"
+                 " -c, --critical=INTEGER <optional>\n"
+                 "    Response time to result in critical status (seconds)\n"
+                 " -t, --timeout=INTEGER <optional>\n"
+                 "    Seconds before connection times out (default: %d)\n"
+                 " -v, --verbose <optional>\n"
+                 "    Show details for command-line debugging (do not use with nagios server)\n"
+                 " -h, --help\n"
+                 "    Print detailed help screen and exit\n"
+                 " -V, --version\n"
+                 "    Print version information and exit\n", DEFAULT_SOCKET_TIMEOUT);
+}