1 /******************************************************************************
2 *
3 * Nagios check_radius plugin
4 *
5 * License: GPL
6 * Copyright (c) 1999-2006 nagios-plugins team
7 *
8 * Last Modified: $Date$
9 *
10 * Description:
11 *
12 * This file contains the check_radius plugin
13 *
14 * Tests to see if a radius server is accepting connections.
15 *
16 *
17 * License Information:
18 *
19 * This program is free software; you can redistribute it and/or modify
20 * it under the terms of the GNU General Public License as published by
21 * the Free Software Foundation; either version 2 of the License, or
22 * (at your option) any later version.
23 *
24 * This program is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
28 *
29 * You should have received a copy of the GNU General Public License
30 * along with this program; if not, write to the Free Software
31 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
32 *
33 * $Id$
34 *
35 *******************************************************************************/
37 const char *progname = "check_radius";
38 const char *revision = "$Revision$";
39 const char *copyright = "2000-2006";
40 const char *email = "nagiosplug-devel@lists.sourceforge.net";
42 #include "common.h"
43 #include "utils.h"
44 #include "netutils.h"
46 #ifdef HAVE_LIBRADIUSCLIENT_NG
47 #include <radiusclient-ng.h>
48 rc_handle *rch = NULL;
49 #else
50 #include <radiusclient.h>
51 #endif
53 int process_arguments (int, char **);
54 void print_help (void);
55 void print_usage (void);
57 /* libradiusclient(-ng) wrapper functions */
58 #ifdef HAVE_LIBRADIUSCLIENT_NG
59 #define my_rc_conf_str(a) rc_conf_str(rch,a)
60 #define my_rc_send_server(a,b) rc_send_server(rch,a,b)
61 #define my_rc_buildreq(a,b,c,d,e,f) rc_buildreq(rch,a,b,c,d,e,f)
62 #define my_rc_own_ipaddress() rc_own_ipaddress(rch)
63 #define my_rc_avpair_add(a,b,c,d) rc_avpair_add(rch,a,b,c,-1,d)
64 #define my_rc_read_dictionary(a) rc_read_dictionary(rch, a)
65 #else
66 #define my_rc_conf_str(a) rc_conf_str(a)
67 #define my_rc_send_server(a,b) rc_send_server(a, b)
68 #define my_rc_buildreq(a,b,c,d,e,f) rc_buildreq(a,b,c,d,e,f)
69 #define my_rc_own_ipaddress() rc_own_ipaddress()
70 #define my_rc_avpair_add(a,b,c,d) rc_avpair_add(a, b, c, d)
71 #define my_rc_read_dictionary(a) rc_read_dictionary(a)
72 #endif
73 int my_rc_read_config(char *);
75 char *server = NULL;
76 char *username = NULL;
77 char *password = NULL;
78 char *nasid = NULL;
79 char *expect = NULL;
80 char *config_file = NULL;
81 unsigned short port = PW_AUTH_UDP_PORT;
82 int retries = 1;
83 int verbose = FALSE;
84 ENV *env = NULL;
86 /******************************************************************************
88 The (psuedo?)literate programming XML is contained within \@\@\- <XML> \-\@\@
89 tags in the comments. With in the tags, the XML is assembled sequentially.
90 You can define entities in tags. You also have all the #defines available as
91 entities.
93 Please note that all tags must be lowercase to use the DocBook XML DTD.
95 @@-<article>
97 <sect1>
98 <title>Quick Reference</title>
99 <!-- The refentry forms a manpage -->
100 <refentry>
101 <refmeta>
102 <manvolnum>5<manvolnum>
103 </refmeta>
104 <refnamdiv>
105 <refname>&progname;</refname>
106 <refpurpose>&SUMMARY;</refpurpose>
107 </refnamdiv>
108 </refentry>
109 </sect1>
111 <sect1>
112 <title>FAQ</title>
113 </sect1>
115 <sect1>
116 <title>Theory, Installation, and Operation</title>
118 <sect2>
119 <title>General Description</title>
120 <para>
121 &DESCRIPTION;
122 </para>
123 </sect2>
125 <sect2>
126 <title>Future Enhancements</title>
127 <para>Todo List</para>
128 <itemizedlist>
129 <listitem>Add option to get password from a secured file rather than the command line</listitem>
130 </itemizedlist>
131 </sect2>
134 <sect2>
135 <title>Functions</title>
136 -@@
137 ******************************************************************************/
141 int
142 main (int argc, char **argv)
143 {
144 UINT4 service;
145 char msg[BUFFER_LEN];
146 SEND_DATA data;
147 int result = STATE_UNKNOWN;
148 UINT4 client_id;
149 char *str;
151 setlocale (LC_ALL, "");
152 bindtextdomain (PACKAGE, LOCALEDIR);
153 textdomain (PACKAGE);
155 if (process_arguments (argc, argv) == ERROR)
156 usage4 (_("Could not parse arguments"));
158 str = strdup ("dictionary");
159 if ((config_file && my_rc_read_config (config_file)) ||
160 my_rc_read_dictionary (my_rc_conf_str (str)))
161 die (STATE_UNKNOWN, _("Config file error"));
163 service = PW_AUTHENTICATE_ONLY;
165 memset (&data, 0, sizeof(data));
166 if (!(my_rc_avpair_add (&data.send_pairs, PW_SERVICE_TYPE, &service, 0) &&
167 my_rc_avpair_add (&data.send_pairs, PW_USER_NAME, username, 0) &&
168 my_rc_avpair_add (&data.send_pairs, PW_USER_PASSWORD, password, 0) &&
169 (nasid==NULL || my_rc_avpair_add (&data.send_pairs, PW_NAS_IDENTIFIER, nasid, 0))))
170 die (STATE_UNKNOWN, _("Out of Memory?"));
172 /*
173 * Fill in NAS-IP-Address
174 */
176 if ((client_id = my_rc_own_ipaddress ()) == 0)
177 return (ERROR_RC);
179 if (my_rc_avpair_add (&(data.send_pairs), PW_NAS_IP_ADDRESS, &client_id, 0) ==
180 NULL) return (ERROR_RC);
182 my_rc_buildreq (&data, PW_ACCESS_REQUEST, server, port, (int)timeout_interval,
183 retries);
185 result = my_rc_send_server (&data, msg);
186 rc_avpair_free (data.send_pairs);
187 if (data.receive_pairs)
188 rc_avpair_free (data.receive_pairs);
190 if (result == TIMEOUT_RC)
191 die (STATE_CRITICAL, _("Timeout"));
192 if (result == ERROR_RC)
193 die (STATE_CRITICAL, _("Auth Error"));
194 if (result == BADRESP_RC)
195 die (STATE_WARNING, _("Auth Failed"));
196 if (expect && !strstr (msg, expect))
197 die (STATE_WARNING, "%s", msg);
198 if (result == OK_RC)
199 die (STATE_OK, _("Auth OK"));
200 return (0);
201 }
205 /* process command-line arguments */
206 int
207 process_arguments (int argc, char **argv)
208 {
209 int c;
211 int option = 0;
212 static struct option longopts[] = {
213 {"hostname", required_argument, 0, 'H'},
214 {"port", required_argument, 0, 'P'},
215 {"username", required_argument, 0, 'u'},
216 {"password", required_argument, 0, 'p'},
217 {"nas-id", required_argument, 0, 'n'},
218 {"filename", required_argument, 0, 'F'},
219 {"expect", required_argument, 0, 'e'},
220 {"retries", required_argument, 0, 'r'},
221 {"timeout", required_argument, 0, 't'},
222 {"verbose", no_argument, 0, 'v'},
223 {"version", no_argument, 0, 'V'},
224 {"help", no_argument, 0, 'h'},
225 {0, 0, 0, 0}
226 };
228 if (argc < 2)
229 return ERROR;
231 if (argc == 9) {
232 config_file = argv[1];
233 username = argv[2];
234 password = argv[3];
235 if (is_intpos (argv[4]))
236 timeout_interval = atoi (argv[4]);
237 else
238 usage2 (_("Timeout interval must be a positive integer"), optarg);
239 if (is_intpos (argv[5]))
240 retries = atoi (argv[5]);
241 else
242 usage4 (_("Number of retries must be a positive integer"));
243 server = argv[6];
244 if (is_intpos (argv[7]))
245 port = atoi (argv[7]);
246 else
247 usage4 (_("Port must be a positive integer"));
248 expect = argv[8];
249 return OK;
250 }
252 while (1) {
253 c = getopt_long (argc, argv, "+hVvH:P:F:u:p:n:t:r:e:", longopts,
254 &option);
256 if (c == -1 || c == EOF || c == 1)
257 break;
259 switch (c) {
260 case '?': /* print short usage statement if args not parsable */
261 usage5 ();
262 case 'h': /* help */
263 print_help ();
264 exit (OK);
265 case 'V': /* version */
266 print_revision (progname, revision);
267 exit (OK);
268 case 'v': /* verbose mode */
269 verbose = TRUE;
270 break;
271 case 'H': /* hostname */
272 if (is_host (optarg) == FALSE) {
273 usage2 (_("Invalid hostname/address"), optarg);
274 }
275 server = optarg;
276 break;
277 case 'P': /* port */
278 if (is_intnonneg (optarg))
279 port = atoi (optarg);
280 else
281 usage4 (_("Port must be a positive integer"));
282 break;
283 case 'u': /* username */
284 username = optarg;
285 break;
286 case 'p': /* password */
287 password = optarg;
288 break;
289 case 'n': /* nas id */
290 nasid = optarg;
291 break;
292 case 'F': /* configuration file */
293 config_file = optarg;
294 break;
295 case 'e': /* expect */
296 expect = optarg;
297 break;
298 case 'r': /* retries */
299 if (is_intpos (optarg))
300 retries = atoi (optarg);
301 else
302 usage4 (_("Number of retries must be a positive integer"));
303 break;
304 case 't': /* timeout */
305 if (is_intpos (optarg))
306 timeout_interval = atoi (optarg);
307 else
308 usage2 (_("Timeout interval must be a positive integer"), optarg);
309 break;
310 }
311 }
312 return OK;
313 }
317 void
318 print_help (void)
319 {
320 char *myport;
321 asprintf (&myport, "%d", PW_AUTH_UDP_PORT);
323 print_revision (progname, revision);
325 printf ("Copyright (c) 1999 Robert August Vincent II\n");
326 printf (COPYRIGHT, copyright, email);
328 printf("%s\n", _("Tests to see if a radius server is accepting connections."));
330 printf ("\n\n");
332 print_usage ();
334 printf (_(UT_HELP_VRSN));
336 printf (_(UT_HOST_PORT), 'P', myport);
338 printf (" %s\n", "-u, --username=STRING");
339 printf (" %s\n", _("The user to authenticate"));
340 printf (" %s\n", "-p, --password=STRING");
341 printf (" %s\n", _("Password for autentication (SECURITY RISK)"));
342 printf (" %s\n", "-n, --nas-id=STRING");
343 printf (" %s\n", _("NAS identifier"));
344 printf (" %s\n", "-F, --filename=STRING");
345 printf (" %s\n", _("Configuration file"));
346 printf (" %s\n", "-e, --expect=STRING");
347 printf (" %s\n", _("Response string to expect from the server"));
348 printf (" %s\n", "-r, --retries=INTEGER");
349 printf (" %s\n", _("Number of times to retry a failed connection"));
351 printf (_(UT_TIMEOUT), timeout_interval);
353 printf ("%s\n", _("This plugin tests a radius server to see if it is accepting connections."));
354 printf ("%s\n", _("The server to test must be specified in the invocation, as well as a user"));
355 printf ("%s\n", _("name and password. A configuration file may also be present. The format of"));
356 printf ("%s\n", _("the configuration file is described in the radiusclient library sources."));
357 printf ("%s\n", _("The password option presents a substantial security issue because the"));
358 printf ("%s\n", _("password can be determined by careful watching of the command line in"));
359 printf ("%s\n", _("a process listing. This risk is exacerbated because nagios will"));
360 printf ("%s\n", _("run the plugin at regular prdictable intervals. Please be sure that"));
361 printf ("%s\n", _("the password used does not allow access to sensitive system resources,"));
362 printf ("%s\n", _("otherwise compormise could occur."));
364 printf (_(UT_SUPPORT));
365 }
369 void
370 print_usage (void)
371 {
372 printf (_("Usage:"));
373 printf ("%s -H host -F config_file -u username -p password [-n nas-id] [-P port]\n\
374 [-t timeout] [-r retries] [-e expect]\n", progname);
375 }
379 int my_rc_read_config(char * a)
380 {
381 #ifdef HAVE_LIBRADIUSCLIENT_NG
382 rch = rc_read_config(a);
383 return (rch == NULL) ? 1 : 0;
384 #else
385 return rc_read_config(a);
386 #endif
387 }