/****************************************************************************** * * CHECK_FTP.C * * Program: FTP plugin for Nagios * License: GPL * Copyright (c) 1999 Ethan Galstad (nagios@nagios.org) * * $Id$ * * Description: * * This plugin will attempt to open an FTP 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. * * 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_ftp" #define FTP_PORT 21 #define FTP_EXPECT "220" #define FTP_QUIT "QUIT\n" int process_arguments (int, char **); int call_getopt (int, char **); void print_usage (void); void print_help (void); time_t start_time, end_time; int server_port = FTP_PORT; char *server_address = NULL; char *server_expect = NULL; 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) { int sd; int result; char buffer[MAX_INPUT_BUFFER]; if (process_arguments (argc, argv) == ERROR) usage ("Could not parse arguments\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, so close connection before exiting */ if (result == STATE_OK) { /* watch for the FTP connection string */ result = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0); /* strip the buffer of carriage returns */ strip (buffer); /* return a WARNING status if we couldn't read any data */ if (result == -1) { printf ("recv() failed\n"); result = STATE_WARNING; } else { /* make sure we find the response we are looking for */ if (!strstr (buffer, server_expect)) { if (server_port == FTP_PORT) printf ("Invalid FTP response received from host\n"); else printf ("Invalid FTP response received from host on port %d\n", server_port); result = STATE_WARNING; } else { time (&end_time); 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; if (verbose == TRUE) printf ("FTP %s - %d sec. response time, %s\n", (result == STATE_OK) ? "ok" : "problem", (int) (end_time - start_time), buffer); else printf ("FTP %s - %d second response time\n", (result == STATE_OK) ? "ok" : "problem", (int) (end_time - start_time)); } } /* close the connection */ send (sd, FTP_QUIT, strlen (FTP_QUIT), 0); close (sd); } /* 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_expect == NULL) server_expect = strscpy (NULL, FTP_EXPECT); 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'}, {"expect", required_argument, 0, 'e'}, {"critical", required_argument, 0, 'c'}, {"warning", required_argument, 0, 'w'}, {"timeout", required_argument, 0, 'w'}, {"port", required_argument, 0, 'p'}, {"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:c:w:t:p:", long_options, &option_index); #else c = getopt (argc, argv, "+hVvH:e:c:w:t:p:"); #endif i++; if (c == -1 || c == EOF || c == 1) break; switch (c) { case 'H': case 'e': case 'c': case 'w': case 't': case 'p': 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 'e': /* expect */ server_expect = 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; } } return i; } void print_usage (void) { printf ("Usage: %s -H [-e expect] [-p port] [-w warn_time]\n" " [-c crit_time] [-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 FTP 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" " -e, --expect=STRING\n" " String to expect in first line of server response (default: %s)\n" " -p, --port=INTEGER\n" " Port number (default: %d)\n" " -w, --warning=INTEGER\n" " Response time to result in warning status (seconds)\n" " -c, --critical=INTEGER\n" " Response time to result in critical status (seconds)\n" " -t, --timeout=INTEGER\n" " Seconds before connection times out (default: %d)\n" " -v" " Show details for command-line debugging (do not use with nagios server)\n" " -h, --help\n" " Print detailed help screen\n" " -V, --version\n" " Print version information\n", FTP_EXPECT, FTP_PORT, DEFAULT_SOCKET_TIMEOUT); }