1 /*****************************************************************************
2 *
3 * Nagios check_radius plugin
4 *
5 * License: GPL
6 * Copyright (c) 1999-2008 Nagios Plugins Development 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 * This program is free software: you can redistribute it and/or modify
18 * it under the terms of the GNU General Public License as published by
19 * the Free Software Foundation, either version 3 of the License, or
20 * (at your option) any later version.
21 *
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
26 *
27 * You should have received a copy of the GNU General Public License
28 * along with this program. If not, see <http://www.gnu.org/licenses/>.
29 *
30 * $Id$
31 *
32 *****************************************************************************/
34 const char *progname = "check_radius";
35 const char *revision = "$Revision$";
36 const char *copyright = "2000-2008";
37 const char *email = "nagiosplug-devel@lists.sourceforge.net";
39 #include "common.h"
40 #include "utils.h"
41 #include "netutils.h"
43 #ifdef HAVE_LIBRADIUSCLIENT_NG
44 #include <radiusclient-ng.h>
45 rc_handle *rch = NULL;
46 #else
47 #include <radiusclient.h>
48 #endif
50 int process_arguments (int, char **);
51 void print_help (void);
52 void print_usage (void);
54 /* libradiusclient(-ng) wrapper functions */
55 #ifdef HAVE_LIBRADIUSCLIENT_NG
56 #define my_rc_conf_str(a) rc_conf_str(rch,a)
57 #define my_rc_send_server(a,b) rc_send_server(rch,a,b)
58 #define my_rc_buildreq(a,b,c,d,e,f) rc_buildreq(rch,a,b,c,d,e,f)
59 #define my_rc_own_ipaddress() rc_own_ipaddress(rch)
60 #define my_rc_avpair_add(a,b,c,d) rc_avpair_add(rch,a,b,c,-1,d)
61 #define my_rc_read_dictionary(a) rc_read_dictionary(rch, a)
62 #else
63 #define my_rc_conf_str(a) rc_conf_str(a)
64 #define my_rc_send_server(a,b) rc_send_server(a, b)
65 #define my_rc_buildreq(a,b,c,d,e,f) rc_buildreq(a,b,c,d,e,f)
66 #define my_rc_own_ipaddress() rc_own_ipaddress()
67 #define my_rc_avpair_add(a,b,c,d) rc_avpair_add(a, b, c, d)
68 #define my_rc_read_dictionary(a) rc_read_dictionary(a)
69 #endif
70 int my_rc_read_config(char *);
72 char *server = NULL;
73 char *username = NULL;
74 char *password = NULL;
75 char *nasid = NULL;
76 char *expect = NULL;
77 char *config_file = NULL;
78 unsigned short port = PW_AUTH_UDP_PORT;
79 int retries = 1;
80 int verbose = FALSE;
81 ENV *env = NULL;
83 /******************************************************************************
85 The (psuedo?)literate programming XML is contained within \@\@\- <XML> \-\@\@
86 tags in the comments. With in the tags, the XML is assembled sequentially.
87 You can define entities in tags. You also have all the #defines available as
88 entities.
90 Please note that all tags must be lowercase to use the DocBook XML DTD.
92 @@-<article>
94 <sect1>
95 <title>Quick Reference</title>
96 <!-- The refentry forms a manpage -->
97 <refentry>
98 <refmeta>
99 <manvolnum>5<manvolnum>
100 </refmeta>
101 <refnamdiv>
102 <refname>&progname;</refname>
103 <refpurpose>&SUMMARY;</refpurpose>
104 </refnamdiv>
105 </refentry>
106 </sect1>
108 <sect1>
109 <title>FAQ</title>
110 </sect1>
112 <sect1>
113 <title>Theory, Installation, and Operation</title>
115 <sect2>
116 <title>General Description</title>
117 <para>
118 &DESCRIPTION;
119 </para>
120 </sect2>
122 <sect2>
123 <title>Future Enhancements</title>
124 <para>Todo List</para>
125 <itemizedlist>
126 <listitem>Add option to get password from a secured file rather than the command line</listitem>
127 </itemizedlist>
128 </sect2>
131 <sect2>
132 <title>Functions</title>
133 -@@
134 ******************************************************************************/
138 int
139 main (int argc, char **argv)
140 {
141 UINT4 service;
142 char msg[BUFFER_LEN];
143 SEND_DATA data;
144 int result = STATE_UNKNOWN;
145 UINT4 client_id;
146 char *str;
148 setlocale (LC_ALL, "");
149 bindtextdomain (PACKAGE, LOCALEDIR);
150 textdomain (PACKAGE);
152 if (process_arguments (argc, argv) == ERROR)
153 usage4 (_("Could not parse arguments"));
155 str = strdup ("dictionary");
156 if ((config_file && my_rc_read_config (config_file)) ||
157 my_rc_read_dictionary (my_rc_conf_str (str)))
158 die (STATE_UNKNOWN, _("Config file error"));
160 service = PW_AUTHENTICATE_ONLY;
162 memset (&data, 0, sizeof(data));
163 if (!(my_rc_avpair_add (&data.send_pairs, PW_SERVICE_TYPE, &service, 0) &&
164 my_rc_avpair_add (&data.send_pairs, PW_USER_NAME, username, 0) &&
165 my_rc_avpair_add (&data.send_pairs, PW_USER_PASSWORD, password, 0) &&
166 (nasid==NULL || my_rc_avpair_add (&data.send_pairs, PW_NAS_IDENTIFIER, nasid, 0))))
167 die (STATE_UNKNOWN, _("Out of Memory?"));
169 /*
170 * Fill in NAS-IP-Address
171 */
173 if ((client_id = my_rc_own_ipaddress ()) == 0)
174 return (ERROR_RC);
176 if (my_rc_avpair_add (&(data.send_pairs), PW_NAS_IP_ADDRESS, &client_id, 0) ==
177 NULL) return (ERROR_RC);
179 my_rc_buildreq (&data, PW_ACCESS_REQUEST, server, port, (int)timeout_interval,
180 retries);
182 result = my_rc_send_server (&data, msg);
183 rc_avpair_free (data.send_pairs);
184 if (data.receive_pairs)
185 rc_avpair_free (data.receive_pairs);
187 if (result == TIMEOUT_RC)
188 die (STATE_CRITICAL, _("Timeout"));
189 if (result == ERROR_RC)
190 die (STATE_CRITICAL, _("Auth Error"));
191 if (result == BADRESP_RC)
192 die (STATE_WARNING, _("Auth Failed"));
193 if (expect && !strstr (msg, expect))
194 die (STATE_WARNING, "%s", msg);
195 if (result == OK_RC)
196 die (STATE_OK, _("Auth OK"));
197 return (0);
198 }
202 /* process command-line arguments */
203 int
204 process_arguments (int argc, char **argv)
205 {
206 int c;
208 int option = 0;
209 static struct option longopts[] = {
210 {"hostname", required_argument, 0, 'H'},
211 {"port", required_argument, 0, 'P'},
212 {"username", required_argument, 0, 'u'},
213 {"password", required_argument, 0, 'p'},
214 {"nas-id", required_argument, 0, 'n'},
215 {"filename", required_argument, 0, 'F'},
216 {"expect", required_argument, 0, 'e'},
217 {"retries", required_argument, 0, 'r'},
218 {"timeout", required_argument, 0, 't'},
219 {"verbose", no_argument, 0, 'v'},
220 {"version", no_argument, 0, 'V'},
221 {"help", no_argument, 0, 'h'},
222 {0, 0, 0, 0}
223 };
225 while (1) {
226 c = getopt_long (argc, argv, "+hVvH:P:F:u:p:n:t:r:e:", longopts,
227 &option);
229 if (c == -1 || c == EOF || c == 1)
230 break;
232 switch (c) {
233 case '?': /* print short usage statement if args not parsable */
234 usage5 ();
235 case 'h': /* help */
236 print_help ();
237 exit (OK);
238 case 'V': /* version */
239 print_revision (progname, revision);
240 exit (OK);
241 case 'v': /* verbose mode */
242 verbose = TRUE;
243 break;
244 case 'H': /* hostname */
245 if (is_host (optarg) == FALSE) {
246 usage2 (_("Invalid hostname/address"), optarg);
247 }
248 server = optarg;
249 break;
250 case 'P': /* port */
251 if (is_intnonneg (optarg))
252 port = atoi (optarg);
253 else
254 usage4 (_("Port must be a positive integer"));
255 break;
256 case 'u': /* username */
257 username = optarg;
258 break;
259 case 'p': /* password */
260 password = optarg;
261 break;
262 case 'n': /* nas id */
263 nasid = optarg;
264 break;
265 case 'F': /* configuration file */
266 config_file = optarg;
267 break;
268 case 'e': /* expect */
269 expect = optarg;
270 break;
271 case 'r': /* retries */
272 if (is_intpos (optarg))
273 retries = atoi (optarg);
274 else
275 usage4 (_("Number of retries must be a positive integer"));
276 break;
277 case 't': /* timeout */
278 if (is_intpos (optarg))
279 timeout_interval = atoi (optarg);
280 else
281 usage2 (_("Timeout interval must be a positive integer"), optarg);
282 break;
283 }
284 }
286 if (server == NULL)
287 usage4 (_("Hostname was not supplied"));
288 if (username == NULL)
289 usage4 (_("User not specified"));
290 if (password == NULL)
291 usage4 (_("Password not specified"));
292 if (config_file == NULL)
293 usage4 (_("Configuration file not specified"));
295 return OK;
296 }
300 void
301 print_help (void)
302 {
303 char *myport;
304 asprintf (&myport, "%d", PW_AUTH_UDP_PORT);
306 print_revision (progname, revision);
308 printf ("Copyright (c) 1999 Robert August Vincent II\n");
309 printf (COPYRIGHT, copyright, email);
311 printf("%s\n", _("Tests to see if a radius server is accepting connections."));
313 printf ("\n\n");
315 print_usage ();
317 printf (_(UT_HELP_VRSN));
319 printf (_(UT_HOST_PORT), 'P', myport);
321 printf (" %s\n", "-u, --username=STRING");
322 printf (" %s\n", _("The user to authenticate"));
323 printf (" %s\n", "-p, --password=STRING");
324 printf (" %s\n", _("Password for autentication (SECURITY RISK)"));
325 printf (" %s\n", "-n, --nas-id=STRING");
326 printf (" %s\n", _("NAS identifier"));
327 printf (" %s\n", "-F, --filename=STRING");
328 printf (" %s\n", _("Configuration file"));
329 printf (" %s\n", "-e, --expect=STRING");
330 printf (" %s\n", _("Response string to expect from the server"));
331 printf (" %s\n", "-r, --retries=INTEGER");
332 printf (" %s\n", _("Number of times to retry a failed connection"));
334 printf (_(UT_TIMEOUT), timeout_interval);
336 printf ("\n");
337 printf ("%s\n", _("This plugin tests a radius server to see if it is accepting connections."));
338 printf ("%s\n", _("The server to test must be specified in the invocation, as well as a user"));
339 printf ("%s\n", _("name and password. A configuration file may also be present. The format of"));
340 printf ("%s\n", _("the configuration file is described in the radiusclient library sources."));
341 printf ("%s\n", _("The password option presents a substantial security issue because the"));
342 printf ("%s\n", _("password can be determined by careful watching of the command line in"));
343 printf ("%s\n", _("a process listing. This risk is exacerbated because nagios will"));
344 printf ("%s\n", _("run the plugin at regular predictable intervals. Please be sure that"));
345 printf ("%s\n", _("the password used does not allow access to sensitive system resources."));
347 printf (_(UT_SUPPORT));
348 }
352 void
353 print_usage (void)
354 {
355 printf (_("Usage:"));
356 printf ("%s -H host -F config_file -u username -p password [-n nas-id] [-P port]\n\
357 [-t timeout] [-r retries] [-e expect]\n", progname);
358 }
362 int my_rc_read_config(char * a)
363 {
364 #ifdef HAVE_LIBRADIUSCLIENT_NG
365 rch = rc_read_config(a);
366 return (rch == NULL) ? 1 : 0;
367 #else
368 return rc_read_config(a);
369 #endif
370 }