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-rw-r--r--plugins/check_nntp.c418
1 files changed, 418 insertions, 0 deletions
diff --git a/plugins/check_nntp.c b/plugins/check_nntp.c
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+++ b/plugins/check_nntp.c
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+/******************************************************************************
+ *
+ * CHECK_NNTP.C
+ *
+ * Program: NNTP plugin for Nagios
+ * License: GPL
+ * Copyright (c) 1999 Ethan Galstad (nagios@nagios.org)
+ *
+ * $Id$
+ *
+ * Description:
+ *
+ * This plugin will attempt to open an NNTP connection with the host.
+ * Successul connects return STATE_OK, refusals and timeouts return
+ * STATE_CRITICAL, other errors return STATE_UNKNOWN. Successful
+ * connects, but incorrect reponse messages from the host result in
+ * STATE_WARNING return values. An invalid newsgroup (if the -g
+ * option is used) results in a STATE_WARNING value.
+ *
+ * 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_nntp"
+
+#define PORT 119
+#define EXPECT1A "200" /* posting allowed */
+#define EXPECT1B "201" /* posting not allowed */
+#define EXPECT "NNTP"
+#define QUIT "QUIT\r\n"
+#define MODEREADER "MODE READER\r\n"
+
+int process_arguments (int, char **);
+int call_getopt (int, char **);
+int validate_arguments (void);
+int check_disk (int usp, int free_disk);
+void print_help (void);
+void print_usage (void);
+
+int server_port = PORT;
+char *server_expect = NULL;
+char *server_address = NULL;
+char *newsgroup = NULL;
+int check_newsgroup = FALSE;
+int send_modereader = FALSE;
+int warning_time = 0;
+int check_warning_time = FALSE;
+int critical_time = 0;
+int check_critical_time = FALSE;
+int verbose = FALSE;
+
+
+int
+main (int argc, char **argv)
+{
+ char buffer[MAX_INPUT_BUFFER] = "";
+ int sd;
+ int result;
+ int recv_result;
+
+ if (process_arguments (argc, argv) != OK)
+ usage ("Invalid command arguments supplied\n");
+
+ /* initialize alarm signal handling */
+ signal (SIGALRM, socket_timeout_alarm_handler);
+
+ /* set socket timeout */
+ alarm (socket_timeout);
+
+ /* try to connect to the host at the given port number */
+ time (&start_time);
+ result = my_tcp_connect (server_address, server_port, &sd);
+
+ /* we connected */
+ if (result == STATE_OK) {
+
+ /* watch for the NNTP connection string */
+ recv_result = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0);
+
+ /* return a WARNING status if we couldn't read any data */
+ if (recv_result == -1) {
+
+ printf ("recv() failed\n");
+ result = STATE_WARNING;
+
+ }
+ else {
+
+ /* strip carriage returns from buffer */
+ strip (buffer);
+
+ /* make sure we find the response we are looking for */
+ if (strstr (buffer, EXPECT1A) != buffer
+ && strstr (buffer, EXPECT1B) != buffer) {
+ printf ("Invalid NNTP response received from host: %s\n", buffer);
+ result = STATE_WARNING;
+ }
+
+ /* optionally send mode reader */
+ /* added 2000-09-18 by Andreas M. Kirchwitz <amk@krell.snafu.de> including some other minor fixes */
+ if (send_modereader == TRUE) {
+ send (sd, MODEREADER, strlen (MODEREADER), 0);
+ recv_result = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0);
+ if (recv_result == -1)
+ strcpy (buffer, "");
+ else
+ buffer[recv_result] = 0;
+ strip (buffer);
+ if ((strstr (buffer, EXPECT1A) != buffer)
+ && (strstr (buffer, EXPECT1B) != buffer)) {
+ printf ("Unexpected NNTP response received from host");
+ result = STATE_WARNING;
+ }
+ }
+
+ if (server_expect && !strstr (buffer, server_expect)) {
+ printf ("Invalid NNTP header received from host: %s\n", buffer);
+ result = STATE_WARNING;
+ }
+
+ if (check_newsgroup == TRUE) {
+ sprintf (buffer, "GROUP %s\r\n", newsgroup);
+ send (sd, buffer, strlen (buffer), 0);
+ recv_result = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0);
+ if (recv_result == -1)
+ strcpy (buffer, "");
+ else
+ buffer[recv_result] = 0;
+ strip (buffer);
+ if (strstr (buffer, "211") != buffer) {
+ printf ("NNTP problem - newsgroup '%s' not found\n", newsgroup);
+ result = STATE_WARNING;
+ }
+ }
+
+ if (result == STATE_OK) {
+ time (&end_time);
+ 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;
+ if (verbose)
+ printf ("NNTP %s - %d sec. response time, %s\n",
+ (result == STATE_OK) ? "ok" : "problem",
+ (int) (end_time - start_time), buffer);
+ else
+ printf ("NNTP %s - %d second response time\n",
+ (result == STATE_OK) ? "ok" : "problem",
+ (int) (end_time - start_time));
+ }
+
+ }
+
+ /* close the connection */
+ send (sd, QUIT, strlen (QUIT), 0);
+ close (sd);
+
+ }
+
+ /* reset the alarm timeout */
+ alarm (0);
+
+ return result;
+}
+
+
+
+
+
+
+/* process command-line arguments */
+int
+process_arguments (int argc, char **argv)
+{
+ int c;
+
+ if (argc < 2)
+ return ERROR;
+
+ 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 (is_host (argv[c])) {
+ server_address = argv[c];
+ }
+ else {
+ usage ("Invalid host name");
+ }
+ }
+ }
+
+ if (server_address == NULL)
+ server_address = strscpy (NULL, "127.0.0.1");
+
+/* if (server_expect==NULL) */
+/* server_expect=strscpy(NULL,EXPECT); */
+
+ return validate_arguments ();
+}
+
+
+
+
+
+
+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'},
+ {"expect", required_argument, 0, 'e'},
+ {"critical", required_argument, 0, 'c'},
+ {"warning", required_argument, 0, 'w'},
+ {"port", required_argument, 0, 'P'},
+ {"modereader", required_argument, 0, 'M'},
+ {"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, "+hVMvt:p:e:c:w:H:", long_options,
+ &option_index);
+#else
+ c = getopt (argc, argv, "+?hVMvt:p:e:c:w:H:");
+#endif
+
+ i++;
+
+ if (c == -1 || c == EOF || c == 1)
+ break;
+
+ switch (c) {
+ case 't':
+ case 'p':
+ case 'e':
+ case 'c':
+ case 'w':
+ case 'H':
+ i++;
+ }
+
+ switch (c) {
+ case 'H': /* hostname */
+ if (is_host (optarg)) {
+ server_address = optarg;
+ }
+ else {
+ usage ("Invalid host name\n");
+ }
+ break;
+ case 'p': /* port */
+ if (is_intpos (optarg)) {
+ server_port = atoi (optarg);
+ }
+ else {
+ usage ("Server port must be a positive integer\n");
+ }
+ break;
+ case 'M': /* mode reader */
+ send_modereader = TRUE;
+ break;
+ case 'e': /* expect */
+ server_expect = optarg;
+ break;
+ case 'g': /* newsgroup */
+ newsgroup = optarg;
+ check_newsgroup = TRUE;
+ break;
+ case 'c': /* critical time threshold */
+ if (is_intnonneg (optarg)) {
+ critical_time = atoi (optarg);
+ check_critical_time = TRUE;
+ }
+ else {
+ usage ("Critical time must be a nonnegative integer\n");
+ }
+ break;
+ case 'w': /* warning time threshold */
+ if (is_intnonneg (optarg)) {
+ warning_time = atoi (optarg);
+ check_warning_time = TRUE;
+ }
+ else {
+ usage ("Warning time must be a nonnegative integer\n");
+ }
+ break;
+ case 'v': /* verbose */
+ verbose = TRUE;
+ break;
+ case 't': /* timeout */
+ if (is_intnonneg (optarg)) {
+ socket_timeout = atoi (optarg);
+ }
+ else {
+ usage ("Time interval must be a nonnegative integer\n");
+ }
+ break;
+ case 'V': /* version */
+ print_revision (PROGNAME, "$Revision$");
+ exit (STATE_OK);
+ case 'h': /* help */
+ print_help ();
+ exit (STATE_OK);
+ case '?': /* help */
+ usage ("Invalid argument\n");
+ }
+ }
+ return i;
+}
+
+
+
+
+
+int
+validate_arguments (void)
+{
+ return OK;
+}
+
+
+
+
+
+void
+print_help (void)
+{
+ print_revision (PROGNAME, "$Revision$");
+ printf
+ ("Copyright (c) 2000 Ethan Galstad/Karl DeBisschop\n\n"
+ "This plugin tests the NNTP service on the specified host.\n\n");
+ print_usage ();
+ printf
+ ("\nOptions:\n"
+ " -H, --hostname=STRING or IPADDRESS\n"
+ " Check server on the indicated host\n"
+ " -p, --port=INTEGER\n"
+ " Make connection on the indicated port (default: %d)\n"
+ " -e, --expect=STRING\n"
+ " String to expect in first line of server response (default: %s)\n"
+ " -g, --group=STRING\n"
+ " Newsgroup to poll\n"
+ " -w, --warning=INTEGER\n"
+ " Seconds necessary to result in a warning status\n"
+ " -c, --critical=INTEGER\n"
+ " Seconds necessary to result in a critical status\n"
+ " -t, --timeout=INTEGER\n"
+ " Seconds before connection attempt times out (default: %d)\n"
+ " -M\n"
+ " Send \"MODE READER\" after initial connect.\n"
+ " -v, --verbose\n"
+ " Print extra information (command-line use only)\n"
+ " -h, --help\n"
+ " Print detailed help screen\n"
+ " -V, --version\n"
+ " Print version information\n\n",
+ PORT, EXPECT, DEFAULT_SOCKET_TIMEOUT);
+ support ();
+}
+
+
+
+
+
+void
+print_usage (void)
+{
+ printf
+ ("Usage: %s -H host [-e expect] [-g group] [-p port] [-w warn] [-c crit]\n"
+ " [-t timeout] [-v]\n"
+ " %s --help\n"
+ " %s --version\n", PROGNAME, PROGNAME, PROGNAME);
+}
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