/***************************************************************************** * * CHECK_REAL.C * * Program: RealMedia plugin for Nagios * License: GPL * Copyright (c) 1999 Pedro Leite (leite@cic.ua.pt) * * Based on CHECK_HTTP.C * Copyright (c) 1999 Ethan Galstad (nagios@nagios.org) * * Last Modified: $Date$ * * Command line: CHECK_REAL [-e expect] [-u url] [-p port] * [-hn host_name] [-wt warn_time] [-ct crit_time] * [-to to_sec] * * Description: * * This plugin will attempt to open an RTSP 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. If you are checking a virtual server that uses "host headers"you * must supply the FQDN (fully qualified domain name) as the [host_name] * argument. * * 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_real" #define PORT 554 #define EXPECT "RTSP/1." #define URL "" 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 *host_name = NULL; char *server_url = 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]; char *status_line = NULL; 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); time (&start_time); /* try to connect to the host at the given port number */ if (my_tcp_connect (server_address, server_port, &sd) != STATE_OK) terminate (STATE_CRITICAL, "Unable to connect to %s on port %d\n", server_address, server_port); /* Part I - Server Check */ /* send the OPTIONS request */ sprintf (buffer, "OPTIONS rtsp://%s:%d RTSP/1.0\n", host_name, server_port); result = send (sd, buffer, strlen (buffer), 0); /* send the header sync */ sprintf (buffer, "CSeq: 1\n"); result = send (sd, buffer, strlen (buffer), 0); /* send a newline so the server knows we're done with the request */ sprintf (buffer, "\n"); result = send (sd, buffer, strlen (buffer), 0); /* watch for the REAL connection string */ result = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0); /* return a CRITICAL status if we couldn't read any data */ if (result == -1) terminate (STATE_CRITICAL, "No data received from %s\n", host_name); /* make sure we find the response we are looking for */ if (!strstr (buffer, EXPECT)) { if (server_port == PORT) printf ("Invalid REAL response received from host\n"); else printf ("Invalid REAL response received from host on port %d\n", server_port); } else { /* else we got the REAL string, so check the return code */ time (&end_time); result = STATE_OK; status_line = (char *) strtok (buffer, "\n"); if (strstr (status_line, "200")) result = STATE_OK; /* client errors result in a warning state */ else if (strstr (status_line, "400")) result = STATE_WARNING; else if (strstr (status_line, "401")) result = STATE_WARNING; else if (strstr (status_line, "402")) result = STATE_WARNING; else if (strstr (status_line, "403")) result = STATE_WARNING; else if (strstr (status_line, "404")) result = STATE_WARNING; /* server errors result in a critical state */ else if (strstr (status_line, "500")) result = STATE_CRITICAL; else if (strstr (status_line, "501")) result = STATE_CRITICAL; else if (strstr (status_line, "502")) result = STATE_CRITICAL; else if (strstr (status_line, "503")) result = STATE_CRITICAL; else result = STATE_UNKNOWN; } /* Part II - Check stream exists and is ok */ if ((result == STATE_OK) && (server_url != NULL)) { /* Part I - Server Check */ /* send the OPTIONS request */ sprintf (buffer, "DESCRIBE rtsp://%s:%d%s RTSP/1.0\n", host_name, server_port, server_url); result = send (sd, buffer, strlen (buffer), 0); /* send the header sync */ sprintf (buffer, "CSeq: 2\n"); result = send (sd, buffer, strlen (buffer), 0); /* send a newline so the server knows we're done with the request */ sprintf (buffer, "\n"); result = send (sd, buffer, strlen (buffer), 0); /* watch for the REAL connection string */ result = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0); /* return a CRITICAL status if we couldn't read any data */ if (result == -1) { printf ("No data received from host\n"); result = STATE_CRITICAL; } else { /* make sure we find the response we are looking for */ if (!strstr (buffer, EXPECT)) { if (server_port == PORT) printf ("Invalid REAL response received from host\n"); else printf ("Invalid REAL response received from host on port %d\n", server_port); } else { /* else we got the REAL string, so check the return code */ time (&end_time); result = STATE_OK; status_line = (char *) strtok (buffer, "\n"); if (strstr (status_line, "200")) result = STATE_OK; /* client errors result in a warning state */ else if (strstr (status_line, "400")) result = STATE_WARNING; else if (strstr (status_line, "401")) result = STATE_WARNING; else if (strstr (status_line, "402")) result = STATE_WARNING; else if (strstr (status_line, "403")) result = STATE_WARNING; else if (strstr (status_line, "404")) result = STATE_WARNING; /* server errors result in a critical state */ else if (strstr (status_line, "500")) result = STATE_CRITICAL; else if (strstr (status_line, "501")) result = STATE_CRITICAL; else if (strstr (status_line, "502")) result = STATE_CRITICAL; else if (strstr (status_line, "503")) result = STATE_CRITICAL; else result = STATE_UNKNOWN; } } } /* Return results */ 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; /* Put some HTML in here to create a dynamic link */ printf ("REAL %s - %d second response time\n", (result == STATE_OK) ? "ok" : "problem", (int) (end_time - start_time)); } else printf ("%s\n", status_line); /* close the connection */ 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) 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_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'}, {"IPaddress", required_argument, 0, 'I'}, {"expect", required_argument, 0, 'e'}, {"url", required_argument, 0, 'u'}, {"port", required_argument, 0, 'p'}, {"critical", required_argument, 0, 'c'}, {"warning", required_argument, 0, 'w'}, {"timeout", required_argument, 0, 't'}, {"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, "+hVI:H:e:u:p:w:c:t:", long_options, &option_index); #else c = getopt (argc, argv, "+?hVI:H:e:u:p:w:c:t"); #endif i++; if (c == -1 || c == EOF || c == 1) break; switch (c) { case 'I': case 'H': case 'e': case 'u': case 'p': case 'w': case 'c': case 't': i++; } switch (c) { case 'I': /* hostname */ if (is_host (optarg)) { server_address = optarg; } else { usage ("Invalid host name\n"); } break; case 'H': /* hostname */ if (is_host (optarg)) { server_address = optarg; } else { usage ("Invalid host name\n"); } break; case 'e': /* string to expect in response header */ server_expect = optarg; break; case 'u': /* string to expect in response header */ server_url = optarg; break; case 'p': /* port */ if (is_intpos (optarg)) { server_port = atoi (optarg); } else { usage ("Server port must be a positive 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 '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 '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 Pedro Leite (leite@cic.ua.pt)/Karl DeBisschop\n\n" "This plugin tests the REAL service on the specified host.\n\n"); print_usage (); printf ("\nOptions:\n" " -H, --hostname=STRING or IPADDRESS\n" " Check this server on the indicated host\n" " -I, --IPaddress=STRING or IPADDRESS\n" " Check server at this host address\n" " -p, --port=INTEGER\n" " Make connection on the indicated port (default: %d)\n" " -u, --url=STRING\n" " Connect to this url\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); } /* // process command-line arguments int process_arguments (int argc, char **argv) { int x; // no options were supplied if (argc < 2) return ERROR; // first option is always the server name/address strncpy (server_address, argv[1], sizeof (server_address) - 1); server_address[sizeof (server_address) - 1] = 0; // set the host name to the server address (until its overridden) strcpy (host_name, server_address); // process all remaining arguments for (x = 3; x <= argc; x++) { // we got the string to expect from the server if (!strcmp (argv[x - 1], "-e")) { if (x < argc) { strncpy (server_expect, argv[x], sizeof (server_expect) - 1); server_expect[sizeof (server_expect) - 1] = 0; x++; } else return ERROR; } // we got the URL to check else if (!strcmp (argv[x - 1], "-u")) { if (x < argc) { strncpy (server_url, argv[x], sizeof (server_url) - 1); server_url[sizeof (server_url) - 1] = 0; x++; } else return ERROR; } // we go the host name to use in the host header else if (!strcmp (argv[x - 1], "-hn")) { if (x < argc) { strncpy (host_name, argv[x], sizeof (host_name) - 1); host_name[sizeof (host_name) - 1] = 0; x++; } else return ERROR; } // we got the port number to use else if (!strcmp (argv[x - 1], "-p")) { if (x < argc) { server_port = atoi (argv[x]); x++; } else return ERROR; } // we got the socket timeout else if (!strcmp (argv[x - 1], "-to")) { if (x < argc) { socket_timeout = atoi (argv[x]); if (socket_timeout <= 0) return ERROR; x++; } else return ERROR; } // we got the warning threshold time else if (!strcmp (argv[x - 1], "-wt")) { if (x < argc) { warning_time = atoi (argv[x]); check_warning_time = TRUE; x++; } else return ERROR; } // we got the critical threshold time else if (!strcmp (argv[x - 1], "-ct")) { if (x < argc) { critical_time = atoi (argv[x]); check_critical_time = TRUE; x++; } else return ERROR; } // else we got something else... else return ERROR; } return OK; } result = process_arguments (argc, argv); if (result != OK) { printf ("Incorrect number of arguments supplied\n"); printf ("\n"); print_revision(argv[0],"$Revision$"); printf ("Copyright (c) 1999 Pedro Leite (leite@cic.ua.pt)\n"); printf ("Last Modified: 30-10-1999\n"); printf ("License: GPL\n"); printf ("\n"); printf ("Usage: %s [-e expect] [-u url] [-p port] [-hn host_name] [-wt warn_time]\n",argv[0]); printf(" [-ct crit_time] [-to to_sec] [-a auth]\n"); printf ("\n"); printf ("Options:\n"); printf (" [expect] = String to expect in first line of server response - default is \"%s\"\n", EXPECT); printf (" [url] = Optional URL to GET - default is root document\n"); printf (" [port] = Optional port number to use - default is %d\n", PORT); printf (" [host_name] = Optional host name argument to GET command - used for servers using host headers\n"); printf (" [warn_time] = Response time in seconds necessary to result in a warning status\n"); printf (" [crit_time] = Response time in seconds necessary to result in a critical status\n"); printf (" [to_sec] = Number of seconds before connection attempt times out - default is %d seconds\n", DEFAULT_SOCKET_TIMEOUT); printf (" [auth] = Optional username:password for sites requiring basic authentication\n"); printf ("\n"); printf ("This plugin attempts to contact the REAL service on the specified host.\n"); printf ("If possible, supply an IP address for the host address, as this will bypass the DNS lookup.\n"); printf ("\n"); return STATE_UNKNOWN; } */