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authorEthan Galstad <egalstad@users.sourceforge.net>2002-02-28 06:42:51 (GMT)
committerEthan Galstad <egalstad@users.sourceforge.net>2002-02-28 06:42:51 (GMT)
commit44a321cb8a42d6c0ea2d96a1086a17f2134c89cc (patch)
treea1a4d9f7b92412a17ab08f34f04eec45433048b7 /plugins/check_udp.c
parent54fd5d7022ff2d6a59bc52b8869182f3fc77a058 (diff)
downloadmonitoring-plugins-44a321cb8a42d6c0ea2d96a1086a17f2134c89cc.tar.gz
Initial revision
git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@2 f882894a-f735-0410-b71e-b25c423dba1c
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diff --git a/plugins/check_udp.c b/plugins/check_udp.c
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1/******************************************************************************
2*
3* CHECK_UDP.C
4*
5* Program: UDP port plugin for Nagios
6* License: GPL
7* Copyright (c) 1999 Ethan Galstad (nagios@nagios.org)
8*
9* Last Modified: $Date$
10*
11* Command line: CHECK_UDP <host_address> [-p port] [-s send] [-e expect] \
12* [-wt warn_time] [-ct crit_time] [-to to_sec]
13*
14* Description:
15*
16* This plugin will attempt to connect to the specified port
17* on the host. Successul connects return STATE_OK, refusals
18* and timeouts return STATE_CRITICAL, other errors return
19* STATE_UNKNOWN.
20*
21* License Information:
22*
23* This program is free software; you can redistribute it and/or modify
24* it under the terms of the GNU General Public License as published by
25* the Free Software Foundation; either version 2 of the License, or
26* (at your option) any later version.
27*
28* This program is distributed in the hope that it will be useful,
29* but WITHOUT ANY WARRANTY; without even the implied warranty of
30* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
31* GNU General Public License for more details.
32*
33* You should have received a copy of the GNU General Public License
34* along with this program; if not, write to the Free Software
35* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
36*
37*****************************************************************************/
38
39#include "config.h"
40#include "common.h"
41#include "netutils.h"
42#include "utils.h"
43
44#define PROGNAME "check_udp"
45
46int warning_time = 0;
47int check_warning_time = FALSE;
48int critical_time = 0;
49int check_critical_time = FALSE;
50
51int process_arguments (int, char **);
52int call_getopt (int, char **);
53void print_usage (void);
54void print_help (void);
55
56int verbose = FALSE;
57int server_port = 0;
58char *server_address = NULL;
59char *server_expect = NULL;
60char *server_send = NULL;
61
62int
63main (int argc, char **argv)
64{
65 int result;
66 char recv_buffer[MAX_INPUT_BUFFER];
67
68 if (process_arguments (argc, argv) == ERROR)
69 usage ("\n");
70
71 /* initialize alarm signal handling */
72 signal (SIGALRM, socket_timeout_alarm_handler);
73
74 /* set socket timeout */
75 alarm (socket_timeout);
76
77 time (&start_time);
78 result =
79 process_udp_request (server_address, server_port, server_send,
80 recv_buffer, MAX_INPUT_BUFFER - 1);
81 time (&end_time);
82
83 if (result != STATE_OK) {
84 printf ("No response from host on port %d\n", server_port);
85 result = STATE_CRITICAL;
86 }
87
88 else {
89
90 /* check to see if we got the response we wanted */
91 if (server_expect) {
92 if (!strstr (recv_buffer, server_expect)) {
93 printf ("Invalid response received from host on port %d\n",
94 server_port);
95 result = STATE_CRITICAL;
96 }
97 }
98 }
99
100 /* we connected, so close connection before exiting */
101 if (result == STATE_OK) {
102
103 if (check_critical_time == TRUE
104 && (end_time - start_time) > critical_time) result = STATE_CRITICAL;
105 else if (check_warning_time == TRUE
106 && (end_time - start_time) > warning_time) result =
107 STATE_WARNING;
108
109 printf ("Connection %s on port %d - %d second response time\n",
110 (result == STATE_OK) ? "accepted" : "problem", server_port,
111 (int) (end_time - start_time));
112 }
113
114 /* reset the alarm */
115 alarm (0);
116
117 return result;
118}
119
120
121
122
123/* process command-line arguments */
124int
125process_arguments (int argc, char **argv)
126{
127 int c;
128
129 if (argc < 2)
130 usage ("\n");
131
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 }
140
141 c = 0;
142 while ((c += call_getopt (argc - c, &argv[c])) < argc) {
143
144 if (is_option (argv[c]))
145 continue;
146
147 if (server_address == NULL) {
148 if (argc > c) {
149 if (is_host (argv[c]) == FALSE)
150 usage ("Invalid host name/address\n");
151 server_address = argv[c];
152 }
153 else {
154 usage ("Host name was not supplied\n");
155 }
156 }
157 }
158
159 if (server_send == NULL)
160 server_send = strscpy (server_send, "");
161
162 return OK;
163}
164
165
166
167
168
169int
170call_getopt (int argc, char **argv)
171{
172 int c, i = 0;
173
174#ifdef HAVE_GETOPT_H
175 int option_index = 0;
176 static struct option long_options[] = {
177 {"hostname", required_argument, 0, 'H'},
178 {"critical", required_argument, 0, 'c'},
179 {"warning", required_argument, 0, 'w'},
180 {"timeout", required_argument, 0, 't'},
181 {"port", required_argument, 0, 'p'},
182 {"expect", required_argument, 0, 'e'},
183 {"send", required_argument, 0, 's'},
184 {"verbose", no_argument, 0, 'v'},
185 {"version", no_argument, 0, 'V'},
186 {"help", no_argument, 0, 'h'},
187 {0, 0, 0, 0}
188 };
189#endif
190
191 while (1) {
192#ifdef HAVE_GETOPT_H
193 c =
194 getopt_long (argc, argv, "+hVvH:e:s:c:w:t:p:", long_options,
195 &option_index);
196#else
197 c = getopt (argc, argv, "+hVvH:e:s:c:w:t:p:");
198#endif
199
200 i++;
201
202 if (c == -1 || c == EOF || c == 1)
203 break;
204
205 switch (c) {
206 case 'H':
207 case 'c':
208 case 'w':
209 case 't':
210 case 'p':
211 case 'e':
212 case 's':
213 i++;
214 }
215
216 switch (c) {
217 case '?': /* print short usage statement if args not parsable */
218 printf ("%s: Unknown argument: %s\n\n", my_basename (argv[0]), optarg);
219 print_usage ();
220 exit (STATE_UNKNOWN);
221 case 'h': /* help */
222 print_help ();
223 exit (STATE_OK);
224 case 'V': /* version */
225 print_revision (my_basename (argv[0]), "$Revision$");
226 exit (STATE_OK);
227 case 'v': /* verbose mode */
228 verbose = TRUE;
229 break;
230 case 'H': /* hostname */
231 if (is_host (optarg) == FALSE)
232 usage ("Invalid host name/address\n");
233 server_address = optarg;
234 break;
235 case 'c': /* critical */
236 if (!is_intnonneg (optarg))
237 usage ("Critical threshold must be a nonnegative integer\n");
238 critical_time = atoi (optarg);
239 check_critical_time = TRUE;
240 break;
241 case 'w': /* warning */
242 if (!is_intnonneg (optarg))
243 usage ("Warning threshold must be a nonnegative integer\n");
244 warning_time = atoi (optarg);
245 check_warning_time = TRUE;
246 break;
247 case 't': /* timeout */
248 if (!is_intnonneg (optarg))
249 usage ("Timeout interval must be a nonnegative integer\n");
250 socket_timeout = atoi (optarg);
251 break;
252 case 'p': /* port */
253 if (!is_intnonneg (optarg))
254 usage ("Serevr port must be a nonnegative integer\n");
255 server_port = atoi (optarg);
256 break;
257 case 'e': /* expect */
258 server_expect = optarg;
259 break;
260 case 's': /* send */
261 server_send = optarg;
262 break;
263 }
264 }
265 return i;
266}
267
268
269
270
271
272void
273print_usage (void)
274{
275 printf
276 ("Usage: %s -H <host_address> [-p port] [-w warn_time] [-c crit_time]\n"
277 " [-e expect] [-s send] [-t to_sec] [-v]\n", PROGNAME);
278}
279
280
281
282
283
284void
285print_help (void)
286{
287 print_revision (PROGNAME, "$Revision$");
288 printf
289 ("Copyright (c) 1999 Ethan Galstad (nagios@nagios.org)\n\n"
290 "This plugin tests an UDP connection with the specified host.\n\n");
291 print_usage ();
292 printf
293 ("Options:\n"
294 " -H, --hostname=ADDRESS\n"
295 " Host name argument for servers using host headers (use numeric\n"
296 " address if possible to bypass DNS lookup).\n"
297 " -p, --port=INTEGER\n"
298 " Port number\n"
299 " -e, --expect=STRING <optional>\n"
300 " String to expect in first line of server response\n"
301 " -s, --send=STRING <optional>\n"
302 " String to send to the server when initiating the connection\n"
303 " -w, --warning=INTEGER <optional>\n"
304 " Response time to result in warning status (seconds)\n"
305 " -c, --critical=INTEGER <optional>\n"
306 " Response time to result in critical status (seconds)\n"
307 " -t, --timeout=INTEGER <optional>\n"
308 " Seconds before connection times out (default: %d)\n"
309 " -v, --verbose <optional>\n"
310 " Show details for command-line debugging (do not use with nagios server)\n"
311 " -h, --help\n"
312 " Print detailed help screen and exit\n"
313 " -V, --version\n"
314 " Print version information and exit\n", DEFAULT_SOCKET_TIMEOUT);
315}