/****************************************************************************** * * CHECK_IMAP.C * * Program: IMAP4 plugin for Nagios * License: GPL * Copyright (c) 1999 Tom Shields (tom.shields@basswood.com) * * $Id$ * * Description: * * This plugin will attempt to open an IMAP 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. * * Modifications: * 04-13-1999 Tom Shields * Initial code * 08-18-1999 Ethan Galstad * Modified code to work with common plugin functions, added socket * timeout, string * length checking * 09-19-1999 Ethan Galstad * Changed expect string from "+OK" to "* OK" and default port to 143 *****************************************************************************/ #include "config.h" #include "common.h" #include "netutils.h" #include "utils.h" #define PROGNAME "check_imap" #define PORT 143 #define EXPECT "* OK" #define QUIT "a1 LOGOUT\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_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) != 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, so close connection before exiting */ if (result == STATE_OK) { /* watch for the IMAP connection string */ result = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0); /* strip carriange 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 == server_port) printf ("Invalid IMAP response received from host\n"); else printf ("Invalid IMAP response received from host on port %d\n", server_port); result = STATE_WARNING; } else { time (&end_time); printf ("IMAP ok - %d second response time\n", (int) (end_time - start_time)); result = STATE_OK; } } /* close the connection */ send (sd, QUIT, strlen (QUIT), 0); close (sd); } /* reset the alarm handler */ 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'}, {"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, "+hVvt:p:e:c:w:H:", long_options, &option_index); #else c = getopt (argc, argv, "+?hVvt: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 'e': /* username */ server_expect = optarg; 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 Tom Shields/Karl DeBisschop\n\n" "This plugin tests the IMAP4 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" " -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" " -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] [-p port] [-w warn] [-c crit]\n" " [-t timeout] [-v]\n" " %s --help\n" " %s --version\n", PROGNAME, PROGNAME, PROGNAME); }