mirror of
https://github.com/monitoring-plugins/monitoring-plugins.git
synced 2026-02-21 17:05:31 -05:00
2208397888
git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@604 f882894a-f735-0410-b71e-b25c423dba1c
649 lines
16 KiB
C
649 lines
16 KiB
C
/*****************************************************************************
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*****************************************************************************/
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#include "config.h"
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#include "common.h"
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#include "netutils.h"
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#include "utils.h"
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#ifdef HAVE_SSL_H
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# include <rsa.h>
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# include <crypto.h>
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# include <x509.h>
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# include <pem.h>
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# include <ssl.h>
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# include <err.h>
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#else
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# ifdef HAVE_OPENSSL_SSL_H
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# include <openssl/rsa.h>
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# include <openssl/crypto.h>
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# include <openssl/x509.h>
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# include <openssl/pem.h>
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# include <openssl/ssl.h>
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# include <openssl/err.h>
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# endif
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#endif
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#ifdef HAVE_SSL
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SSL_CTX *ctx;
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SSL *ssl;
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int connect_SSL (void);
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#endif
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enum {
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TCP_PROTOCOL = 1,
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UDP_PROTOCOL = 2,
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MAXBUF = 1024
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};
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int process_arguments (int, char **);
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void print_usage (void);
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void print_help (void);
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int my_recv (void);
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char *SERVICE = NULL;
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char *SEND = NULL;
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char *EXPECT = NULL;
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char *QUIT = NULL;
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int PROTOCOL = 0;
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int PORT = 0;
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int server_port = 0;
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char *server_address = NULL;
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char *server_send = NULL;
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char *server_quit = NULL;
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char **server_expect = NULL;
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int server_expect_count = 0;
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int maxbytes = 0;
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char **warn_codes = NULL;
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int warn_codes_count = 0;
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char **crit_codes = NULL;
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int crit_codes_count = 0;
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int delay = 0;
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double warning_time = 0;
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int check_warning_time = FALSE;
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double critical_time = 0;
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int check_critical_time = FALSE;
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double elapsed_time = 0;
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int verbose = FALSE;
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int use_ssl = FALSE;
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int sd = 0;
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char *buffer = "";
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/* progname changes depending on symlink called */
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char *progname = "check_tcp";
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const char *revision = "$Revision$";
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const char *copyright = "2002-2003";
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const char *email = "nagiosplug-devel@lists.sourceforge.net";
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void
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print_usage (void)
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{
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printf (_("\
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Usage: %s -H host -p port [-w <warning time>] [-c <critical time>]\n\
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[-s <send string>] [-e <expect string>] [-q <quit string>]\n\
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[-m <maximum bytes>] [-d <delay>] [-t <timeout seconds>]\n\
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[-r <refuse state>] [-v] [-4|-6]\n"), progname);
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printf (" %s (-h|--help)\n", progname);
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printf (" %s (-V|--version)\n", progname);
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}
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void
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print_help (void)
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{
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print_revision (progname, revision);
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printf (_("\
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Copyright (c) %s Nagios Plugin Development Team\n\
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\t<%s>\n\n"),
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copyright, email);
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printf (_("\
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This plugin tests %s connections with the specified host.\n\n"),
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SERVICE);
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print_usage ();
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printf (_("\
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\nOptions:\n\
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-H, --hostname=ADDRESS\n\
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Host name argument for servers using host headers (use numeric\n\
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address if possible to bypass DNS lookup).\n\
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-p, --port=INTEGER\n\
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Port number\n\
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-4, --use-ipv4\n\
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Use IPv4 connection\n\
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-6, --use-ipv6\n\
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Use IPv6 connection\n"));
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printf (_("\
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-s, --send=STRING\n\
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String to send to the server\n\
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-e, --expect=STRING\n\
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String to expect in server response\n\
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-q, --quit=STRING\n\
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String to send server to initiate a clean close of the connection\n"));
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printf (_("\
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-r, --refuse=ok|warn|crit\n\
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Accept tcp refusals with states ok, warn, crit (default: crit)\n\
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-m, --maxbytes=INTEGER\n\
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Close connection once more than this number of bytes are received\n\
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-d, --delay=INTEGER\n\
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Seconds to wait between sending string and polling for response\n\
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-w, --warning=DOUBLE\n\
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Response time to result in warning status (seconds)\n\
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-c, --critical=DOUBLE\n\
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Response time to result in critical status (seconds)\n"));
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printf (_("\
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-t, --timeout=INTEGER\n\
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Seconds before connection times out (default: %d)\n\
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-v, --verbose\n\
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Show details for command-line debugging (Nagios may truncate output)\n\
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-h, --help\n\
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Print detailed help screen\n\
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-V, --version\n\
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Print version information\n\n"),
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DEFAULT_SOCKET_TIMEOUT);
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support ();
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}
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int
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main (int argc, char **argv)
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{
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int result;
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int i;
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char *status = "";
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struct timeval tv;
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setlocale (LC_ALL, "");
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bindtextdomain (PACKAGE, LOCALEDIR);
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textdomain (PACKAGE);
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if (strstr (argv[0], "check_udp")) {
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progname = strdup ("check_udp");
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SERVICE = strdup ("UDP");
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SEND = NULL;
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EXPECT = NULL;
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QUIT = NULL;
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PROTOCOL = UDP_PROTOCOL;
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PORT = 0;
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}
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else if (strstr (argv[0], "check_tcp")) {
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progname = strdup ("check_tcp");
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SERVICE = strdup ("TCP");
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SEND = NULL;
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EXPECT = NULL;
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QUIT = NULL;
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PROTOCOL = TCP_PROTOCOL;
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PORT = 0;
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}
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else if (strstr (argv[0], "check_ftp")) {
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progname = strdup ("check_ftp");
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SERVICE = strdup ("FTP");
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SEND = NULL;
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EXPECT = strdup ("220");
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QUIT = strdup ("QUIT\r\n");
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PROTOCOL = TCP_PROTOCOL;
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PORT = 21;
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}
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else if (strstr (argv[0], "check_smtp")) {
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progname = strdup ("check_smtp");
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SERVICE = strdup ("SMTP");
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SEND = NULL;
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EXPECT = strdup ("220");
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QUIT = strdup ("QUIT\r\n");
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PROTOCOL = TCP_PROTOCOL;
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PORT = 25;
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}
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else if (strstr (argv[0], "check_pop")) {
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progname = strdup ("check_pop");
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SERVICE = strdup ("POP");
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SEND = NULL;
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EXPECT = strdup ("+OK");
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QUIT = strdup ("QUIT\r\n");
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PROTOCOL = TCP_PROTOCOL;
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PORT = 110;
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}
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else if (strstr (argv[0], "check_imap")) {
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progname = strdup ("check_imap");
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SERVICE = strdup ("IMAP");
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SEND = NULL;
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EXPECT = strdup ("* OK");
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QUIT = strdup ("a1 LOGOUT\r\n");
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PROTOCOL = TCP_PROTOCOL;
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PORT = 143;
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}
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#ifdef HAVE_SSL
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else if (strstr(argv[0],"check_simap")) {
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progname = strdup ("check_simap");
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SERVICE = strdup ("SIMAP");
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SEND=NULL;
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EXPECT = strdup ("* OK");
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QUIT = strdup ("a1 LOGOUT\r\n");
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PROTOCOL=TCP_PROTOCOL;
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use_ssl=TRUE;
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PORT=993;
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}
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else if (strstr(argv[0],"check_spop")) {
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progname = strdup ("check_spop");
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SERVICE = strdup ("SPOP");
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SEND=NULL;
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EXPECT = strdup ("+OK");
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QUIT = strdup ("QUIT\r\n");
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PROTOCOL=TCP_PROTOCOL;
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use_ssl=TRUE;
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PORT=995;
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}
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#endif
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else if (strstr (argv[0], "check_nntp")) {
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progname = strdup ("check_nntp");
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SERVICE = strdup ("NNTP");
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SEND = NULL;
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EXPECT = NULL;
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server_expect = realloc (server_expect, ++server_expect_count);
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asprintf (&server_expect[server_expect_count - 1], "200");
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server_expect = realloc (server_expect, ++server_expect_count);
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asprintf (&server_expect[server_expect_count - 1], "201");
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asprintf (&QUIT, "QUIT\r\n");
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PROTOCOL = TCP_PROTOCOL;
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PORT = 119;
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}
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else {
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usage (_("ERROR: Generic check_tcp called with unknown service\n"));
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}
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server_address = strdup ("127.0.0.1");
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server_port = PORT;
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server_send = SEND;
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server_quit = QUIT;
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if (process_arguments (argc, argv) == ERROR)
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usage (_("Could not parse arguments\n"));
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/* use default expect if none listed in process_arguments() */
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if (EXPECT && server_expect_count == 0) {
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server_expect = malloc (++server_expect_count);
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server_expect[server_expect_count - 1] = EXPECT;
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}
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/* initialize alarm signal handling */
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signal (SIGALRM, socket_timeout_alarm_handler);
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/* set socket timeout */
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alarm (socket_timeout);
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/* try to connect to the host at the given port number */
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gettimeofday (&tv, NULL);
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#ifdef HAVE_SSL
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if (use_ssl)
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result = connect_SSL ();
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else
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#endif
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{
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if (PROTOCOL == UDP_PROTOCOL)
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result = my_udp_connect (server_address, server_port, &sd);
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else
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/* default is TCP */
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result = my_tcp_connect (server_address, server_port, &sd);
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}
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if (result == STATE_CRITICAL)
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return STATE_CRITICAL;
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if (server_send != NULL) { /* Something to send? */
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asprintf (&server_send, "%s\r\n", server_send);
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#ifdef HAVE_SSL
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if (use_ssl)
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SSL_write(ssl, server_send, strlen (server_send));
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else
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#endif
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send (sd, server_send, strlen (server_send), 0);
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}
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if (delay > 0) {
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tv.tv_sec += delay;
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sleep (delay);
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}
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if (server_send || server_expect_count > 0) {
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buffer = malloc (MAXBUF);
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memset (buffer, '\0', MAXBUF);
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/* watch for the expect string */
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while ((i = my_recv ()) > 0) {
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buffer[i] = '\0';
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asprintf (&status, "%s%s", status, buffer);
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if (buffer[i-2] == '\r' && buffer[i-1] == '\n')
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break;
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if (maxbytes>0 && strlen(status) >= (unsigned)maxbytes)
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break;
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}
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/* return a CRITICAL status if we couldn't read any data */
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if (status == NULL)
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terminate (STATE_CRITICAL, _("No data received from host\n"));
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strip (status);
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if (status && verbose)
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printf ("%s\n", status);
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if (server_expect_count > 0) {
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for (i = 0;; i++) {
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if (verbose)
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printf ("%d %d\n", i, server_expect_count);
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if (i >= server_expect_count)
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terminate (STATE_WARNING, _("Invalid response from host\n"));
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if (strstr (status, server_expect[i]))
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break;
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}
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}
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}
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if (server_quit != NULL) {
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#ifdef HAVE_SSL
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if (use_ssl) {
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SSL_write (ssl, server_quit, strlen (server_quit));
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SSL_shutdown (ssl);
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SSL_free (ssl);
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SSL_CTX_free (ctx);
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}
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else {
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#endif
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send (sd, server_quit, strlen (server_quit), 0);
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#ifdef HAVE_SSL
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}
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#endif
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}
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/* close the connection */
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if (sd)
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close (sd);
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elapsed_time = delta_time (tv);
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if (check_critical_time == TRUE && elapsed_time > critical_time)
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result = STATE_CRITICAL;
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else if (check_warning_time == TRUE && elapsed_time > warning_time)
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result = STATE_WARNING;
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/* reset the alarm */
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alarm (0);
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printf
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(_("%s %s%s - %.3f second response time on port %d"),
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SERVICE,
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state_text (result),
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(was_refused) ? " (refused)" : "",
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elapsed_time, server_port);
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if (status && strlen(status) > 0)
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printf (" [%s]", status);
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printf ("|time=%.3f\n", elapsed_time);
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return result;
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}
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/* process command-line arguments */
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int
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process_arguments (int argc, char **argv)
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{
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int c;
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int option_index = 0;
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static struct option long_options[] = {
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{"hostname", required_argument, 0, 'H'},
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{"critical-time", required_argument, 0, 'c'},
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{"warning-time", required_argument, 0, 'w'},
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{"critical-codes", required_argument, 0, 'C'},
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{"warning-codes", required_argument, 0, 'W'},
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{"timeout", required_argument, 0, 't'},
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{"protocol", required_argument, 0, 'P'},
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{"port", required_argument, 0, 'p'},
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{"send", required_argument, 0, 's'},
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{"expect", required_argument, 0, 'e'},
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{"maxbytes", required_argument, 0, 'm'},
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{"quit", required_argument, 0, 'q'},
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{"delay", required_argument, 0, 'd'},
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{"refuse", required_argument, 0, 'r'},
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{"use-ipv4", no_argument, 0, '4'},
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{"use-ipv6", no_argument, 0, '6'},
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{"verbose", no_argument, 0, 'v'},
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{"version", no_argument, 0, 'V'},
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{"help", no_argument, 0, 'h'},
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{0, 0, 0, 0}
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};
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if (argc < 2)
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usage ("No arguments found\n");
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/* backwards compatibility */
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for (c = 1; c < argc; c++) {
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if (strcmp ("-to", argv[c]) == 0)
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strcpy (argv[c], "-t");
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else if (strcmp ("-wt", argv[c]) == 0)
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strcpy (argv[c], "-w");
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else if (strcmp ("-ct", argv[c]) == 0)
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strcpy (argv[c], "-c");
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}
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if (!is_option (argv[1])) {
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server_address = argv[1];
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argv[1] = argv[0];
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argv = &argv[1];
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argc--;
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}
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while (1) {
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c = getopt_long (argc, argv, "+hVv46H:s:e:q:m:c:w:t:p:C:W:d:Sr:",
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long_options, &option_index);
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if (c == -1 || c == EOF || c == 1)
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break;
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switch (c) {
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case '?': /* print short usage statement if args not parsable */
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printf (_("%s: Unknown argument: %s\n\n"), progname, optarg);
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print_usage ();
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exit (STATE_UNKNOWN);
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case 'h': /* help */
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print_help ();
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exit (STATE_OK);
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case 'V': /* version */
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print_revision (progname, "$Revision$");
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exit (STATE_OK);
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case 'v': /* verbose mode */
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verbose = TRUE;
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break;
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case '4':
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address_family = AF_INET;
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break;
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case '6':
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#ifdef USE_IPV6
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address_family = AF_INET6;
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#else
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usage (_("IPv6 support not available\n"));
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#endif
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break;
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case 'H': /* hostname */
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if (is_host (optarg) == FALSE)
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usage2 (_("invalid host name or address"), optarg);
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server_address = optarg;
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break;
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case 'c': /* critical */
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if (!is_intnonneg (optarg))
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usage (_("Critical threshold must be a nonnegative integer\n"));
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critical_time = strtod (optarg, NULL);
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check_critical_time = TRUE;
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break;
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case 'w': /* warning */
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if (!is_intnonneg (optarg))
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usage (_("Warning threshold must be a nonnegative integer\n"));
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warning_time = strtod (optarg, NULL);
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check_warning_time = TRUE;
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break;
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case 'C':
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crit_codes = realloc (crit_codes, ++crit_codes_count);
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crit_codes[crit_codes_count - 1] = optarg;
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break;
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case 'W':
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warn_codes = realloc (warn_codes, ++warn_codes_count);
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warn_codes[warn_codes_count - 1] = optarg;
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break;
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case 't': /* timeout */
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if (!is_intpos (optarg))
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usage (_("Timeout interval must be a positive integer\n"));
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socket_timeout = atoi (optarg);
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break;
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case 'p': /* port */
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if (!is_intpos (optarg))
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usage (_("Server port must be a positive integer\n"));
|
||
server_port = atoi (optarg);
|
||
break;
|
||
case 's':
|
||
server_send = optarg;
|
||
break;
|
||
case 'e': /* expect string (may be repeated) */
|
||
EXPECT = NULL;
|
||
if (server_expect_count == 0)
|
||
server_expect = malloc (++server_expect_count);
|
||
else
|
||
server_expect = realloc (server_expect, ++server_expect_count);
|
||
server_expect[server_expect_count - 1] = optarg;
|
||
break;
|
||
case 'm':
|
||
if (!is_intpos (optarg))
|
||
usage (_("Maxbytes must be a positive integer\n"));
|
||
maxbytes = atoi (optarg);
|
||
case 'q':
|
||
server_quit = optarg;
|
||
break;
|
||
case 'r':
|
||
if (!strncmp(optarg,"ok",2))
|
||
econn_refuse_state = STATE_OK;
|
||
else if (!strncmp(optarg,"warn",4))
|
||
econn_refuse_state = STATE_WARNING;
|
||
else if (!strncmp(optarg,"crit",4))
|
||
econn_refuse_state = STATE_CRITICAL;
|
||
else
|
||
usage (_("Refuse mut be one of ok, warn, crit\n"));
|
||
break;
|
||
case 'd':
|
||
if (is_intpos (optarg))
|
||
delay = atoi (optarg);
|
||
else
|
||
usage (_("Delay must be a positive integer\n"));
|
||
break;
|
||
case 'S':
|
||
#ifndef HAVE_SSL
|
||
terminate (STATE_UNKNOWN,
|
||
_("SSL support not available. Install OpenSSL and recompile."));
|
||
#endif
|
||
use_ssl = TRUE;
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (server_address == NULL)
|
||
usage (_("You must provide a server address\n"));
|
||
|
||
return OK;
|
||
}
|
||
|
||
|
||
#ifdef HAVE_SSL
|
||
int
|
||
connect_SSL (void)
|
||
{
|
||
SSL_METHOD *meth;
|
||
|
||
/* Initialize SSL context */
|
||
SSLeay_add_ssl_algorithms ();
|
||
meth = SSLv2_client_method ();
|
||
SSL_load_error_strings ();
|
||
if ((ctx = SSL_CTX_new (meth)) == NULL)
|
||
{
|
||
printf (_("ERROR: Cannot create SSL context.\n"));
|
||
return STATE_CRITICAL;
|
||
}
|
||
|
||
/* Initialize alarm signal handling */
|
||
signal (SIGALRM, socket_timeout_alarm_handler);
|
||
|
||
/* Set socket timeout */
|
||
alarm (socket_timeout);
|
||
|
||
/* Save start time */
|
||
time (&start_time);
|
||
|
||
/* Make TCP connection */
|
||
if (my_tcp_connect (server_address, server_port, &sd) == STATE_OK && was_refused == FALSE)
|
||
{
|
||
/* Do the SSL handshake */
|
||
if ((ssl = SSL_new (ctx)) != NULL)
|
||
{
|
||
SSL_set_fd (ssl, sd);
|
||
if (SSL_connect (ssl) != -1)
|
||
return OK;
|
||
ERR_print_errors_fp (stderr);
|
||
}
|
||
else
|
||
{
|
||
printf (_("ERROR: Cannot initiate SSL handshake.\n"));
|
||
}
|
||
SSL_free (ssl);
|
||
}
|
||
|
||
SSL_CTX_free (ctx);
|
||
close (sd);
|
||
|
||
return STATE_CRITICAL;
|
||
}
|
||
#endif
|
||
|
||
|
||
|
||
int
|
||
my_recv (void)
|
||
{
|
||
int i;
|
||
|
||
#ifdef HAVE_SSL
|
||
if (use_ssl) {
|
||
i = SSL_read (ssl, buffer, MAXBUF - 1);
|
||
}
|
||
else {
|
||
#endif
|
||
i = read (sd, buffer, MAXBUF - 1);
|
||
#ifdef HAVE_SSL
|
||
}
|
||
#endif
|
||
|
||
return i;
|
||
}
|