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[nagiosplug.git] / plugins / check_udp.c
1 /******************************************************************************
3  This program is free software; you can redistribute it and/or modify
4  it under the terms of the GNU General Public License as published by
5  the Free Software Foundation; either version 2 of the License, or
6  (at your option) any later version.
8  This program is distributed in the hope that it will be useful,
9  but WITHOUT ANY WARRANTY; without even the implied warranty of
10  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11  GNU General Public License for more details.
13  You should have received a copy of the GNU General Public License
14  along with this program; if not, write to the Free Software
15  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17  $Id$
18  
19 *****************************************************************************/
21 const char *progname = "check_udp";
22 const char *revision = "$Revision$";
23 const char *copyright = "1999-2004";
24 const char *email = "nagiosplug-devel@lists.sourceforge.net";
26 #include "common.h"
27 #include "netutils.h"
28 #include "utils.h"
30 int process_arguments (int, char **);
31 void print_help (void);
32 void print_usage (void);
34 int warning_time = 0;
35 int check_warning_time = FALSE;
36 int critical_time = 0;
37 int check_critical_time = FALSE;
38 int verbose = FALSE;
39 int server_port = 0;
40 char *server_address = NULL;
41 char *server_expect = NULL;
42 char *server_send;
44 int
45 main (int argc, char **argv)
46 {
47         int result = STATE_UNKNOWN;
48         char recv_buffer[MAX_INPUT_BUFFER];
50         setlocale (LC_ALL, "");
51         bindtextdomain (PACKAGE, LOCALEDIR);
52         textdomain (PACKAGE);
54         if (process_arguments (argc, argv) != TRUE)
55                 usage4 (_("Could not parse arguments"));
57         /* initialize alarm signal handling */
58         signal (SIGALRM, socket_timeout_alarm_handler);
60         /* set socket timeout */
61         alarm (socket_timeout);
63         time (&start_time);
64         result = process_udp_request (server_address, server_port, server_send,
65                         recv_buffer, MAX_INPUT_BUFFER - 1);
66                         
67         time (&end_time);
69         if (result != STATE_OK) {
70                 printf ("No response from host on port %d\n", server_port);
71                 result = STATE_CRITICAL;
72         }
74         else {
76                 /* check to see if we got the response we wanted */
77                 if (server_expect) {
78                         if (!strstr (recv_buffer, server_expect)) {
79                                 printf ("Invalid response received from host on port %d\n",
80                                                                 server_port);
81                                 result = STATE_CRITICAL;
82                         }
83                 }
84         }
86         /* we connected, so close connection before exiting */
87         if (result == STATE_OK) {
89                 if (check_critical_time == TRUE
90                                 && (end_time - start_time) > critical_time) result = STATE_CRITICAL;
91                 else if (check_warning_time == TRUE
92                                                  && (end_time - start_time) > warning_time) result =
93                                 STATE_WARNING;
95                 printf (_("Connection %s on port %d - %d second response time\n"),
96                                                 (result == STATE_OK) ? _("accepted") : _("problem"), server_port,
97                                                 (int) (end_time - start_time));
98         }
100         /* reset the alarm */
101         alarm (0);
103         return result;
108 /* process command-line arguments */
109 int
110 process_arguments (int argc, char **argv)
112         int c;
114         int option = 0;
115         static struct option longopts[] = {
116                 {"hostname", required_argument, 0, 'H'},
117                 {"critical", required_argument, 0, 'c'},
118                 {"warning", required_argument, 0, 'w'},
119                 {"timeout", required_argument, 0, 't'},
120                 {"port", required_argument, 0, 'p'},
121                 {"expect", required_argument, 0, 'e'},
122                 {"send", required_argument, 0, 's'},
123                 {"verbose", no_argument, 0, 'v'},
124                 {"version", no_argument, 0, 'V'},
125                 {"help", no_argument, 0, 'h'},
126                 {0, 0, 0, 0}
127         };
129         if (argc < 2)
130                 usage ("\n");
132         for (c = 1; c < argc; c++) {
133                 if (strcmp ("-to", argv[c]) == 0)
134                         strcpy (argv[c], "-t");
135                 else if (strcmp ("-wt", argv[c]) == 0)
136                         strcpy (argv[c], "-w");
137                 else if (strcmp ("-ct", argv[c]) == 0)
138                         strcpy (argv[c], "-c");
139         }
141         while (1) {
142                 c = getopt_long (argc, argv, "+hVvH:e:s:c:w:t:p:", longopts, &option);
144                 if (c == -1 || c == EOF || c == 1)
145                         break;
147                 switch (c) {
148                 case '?':                                                                       /* print short usage statement if args not parsable */
149                         printf (_("%s: Unknown argument: %s\n\n"), progname, optarg);
150                         print_usage ();
151                         exit (STATE_UNKNOWN);
152                 case 'h':                                                                       /* help */
153                         print_help ();
154                         exit (STATE_OK);
155                 case 'V':                                                                       /* version */
156                         print_revision (progname, revision);
157                         exit (STATE_OK);
158                 case 'v':                                                                       /* verbose mode */
159                         verbose = TRUE;
160                         break;
161                 case 'H':                                                                       /* hostname */
162                         if (is_host (optarg) == FALSE)
163                                 usage2 (_("Invalid hostname/address"), optarg);
164                         server_address = optarg;
165                         break;
166                 case 'c':                                                                       /* critical */
167                         if (!is_intnonneg (optarg))
168                                 usage (_("Critical threshold must be a positive integer\n"));
169                         else
170                                 critical_time = atoi (optarg);
171                         check_critical_time = TRUE;
172                         break;
173                 case 'w':                                                                       /* warning */
174                         if (!is_intnonneg (optarg))
175                                 usage (_("Warning threshold must be a positive integer\n"));
176                         else
177                                 warning_time = atoi (optarg);
178                         check_warning_time = TRUE;
179                         break;
180                 case 't':                                                                       /* timeout */
181                         if (!is_intnonneg (optarg))
182                                 usage2 (_("Timeout interval must be a positive integer"), optarg);
183                         else
184                                 socket_timeout = atoi (optarg);
185                         break;
186                 case 'p':                                                                       /* port */
187                         if (!is_intnonneg (optarg))
188                                 usage (_("Port must be a positive integer\n"));
189                         else
190                                 server_port = atoi (optarg);
191                         break;
192                 case 'e':                                                                       /* expect */
193                         server_expect = optarg;
194                         break;
195                 case 's':                                                                       /* send */
196                         server_send = optarg;
197                         break;
198                 }
199         }
201         c = optind;
202         if (server_address == NULL && c < argc && argv[c]) {
203                 if (is_host (argv[c]) == FALSE)
204                         usage2 (_("Invalid hostname/address"), optarg);
205                 server_address = argv[c++];
206         }
208         if (server_address == NULL)
209                 usage (_("Host name was not supplied\n"));
211         if (server_send == NULL)
212                 server_send = strdup("");
214         return c;
219 void
220 print_help (void)
222         print_revision (progname, revision);
224         printf ("Copyright (c) 1999 Ethan Galstad\n");
225         printf (COPYRIGHT, copyright, email);
227         printf (_("\
228 This plugin tests an UDP connection with the specified host.\n\n"));
230         print_usage ();
232         printf (_(UT_HELP_VRSN));
234         printf (_(UT_HOST_PORT), 'p', "none");
236         printf (_("\
237  -e, --expect=STRING <optional>\n\
238     String to expect in first line of server response\n\
239  -s, --send=STRING <optional>\n\
240     String to send to the server when initiating the connection\n"));
242         printf (_(UT_WARN_CRIT));
244         printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
246         printf (_(UT_VERBOSE));
248         printf (_("\
249 This plugin will attempt to connect to the specified port on the host.\n\
250 Successful connects return STATE_OK, refusals and timeouts return\n\
251 STATE_CRITICAL, other errors return STATE_UNKNOWN.\n\n"));
253         printf(_(UT_SUPPORT));
259 /* Original Command line: 
260    check_udp <host_address> [-p port] [-s send] [-e expect] \
261    [-wt warn_time] [-ct crit_time] [-to to_sec] */
262 void
263 print_usage (void)
265         printf (_("\
266 Usage: %s -H <host_address> [-p port] [-w warn_time] [-c crit_time]\n\
267     [-e expect] [-s send] [-t to_sec] [-v]\n"), progname);
268         printf (_(UT_HLP_VRS), progname, progname);