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pkg-monitoring-plugins/plugins/check_radius.c

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/******************************************************************************
*
* Nagios check_radius plugin
*
* License: GPL
* Copyright (c) 1999-2006 nagios-plugins team
*
* Last Modified: $Date: 2007-12-10 07:52:00 +0000 (Mon, 10 Dec 2007) $
*
* Description:
*
* This file contains the check_radius plugin
*
* Tests to see if a radius server is accepting connections.
*
*
* 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.
*
* $Id: check_radius.c 1859 2007-12-10 07:52:00Z dermoth $
*
*******************************************************************************/
const char *progname = "check_radius";
const char *revision = "$Revision: 1859 $";
const char *copyright = "2000-2006";
const char *email = "nagiosplug-devel@lists.sourceforge.net";
#include "common.h"
#include "utils.h"
#include "netutils.h"
#ifdef HAVE_LIBRADIUSCLIENT_NG
#include <radiusclient-ng.h>
rc_handle *rch = NULL;
#else
#include <radiusclient.h>
#endif
int process_arguments (int, char **);
void print_help (void);
void print_usage (void);
/* libradiusclient(-ng) wrapper functions */
#ifdef HAVE_LIBRADIUSCLIENT_NG
#define my_rc_conf_str(a) rc_conf_str(rch,a)
#define my_rc_send_server(a,b) rc_send_server(rch,a,b)
#define my_rc_buildreq(a,b,c,d,e,f) rc_buildreq(rch,a,b,c,d,e,f)
#define my_rc_own_ipaddress() rc_own_ipaddress(rch)
#define my_rc_avpair_add(a,b,c,d) rc_avpair_add(rch,a,b,c,-1,d)
#define my_rc_read_dictionary(a) rc_read_dictionary(rch, a)
#else
#define my_rc_conf_str(a) rc_conf_str(a)
#define my_rc_send_server(a,b) rc_send_server(a, b)
#define my_rc_buildreq(a,b,c,d,e,f) rc_buildreq(a,b,c,d,e,f)
#define my_rc_own_ipaddress() rc_own_ipaddress()
#define my_rc_avpair_add(a,b,c,d) rc_avpair_add(a, b, c, d)
#define my_rc_read_dictionary(a) rc_read_dictionary(a)
#endif
int my_rc_read_config(char *);
char *server = NULL;
char *username = NULL;
char *password = NULL;
char *nasid = NULL;
char *expect = NULL;
char *config_file = NULL;
unsigned short port = PW_AUTH_UDP_PORT;
int retries = 1;
int verbose = FALSE;
ENV *env = NULL;
/******************************************************************************
The (psuedo?)literate programming XML is contained within \@\@\- <XML> \-\@\@
tags in the comments. With in the tags, the XML is assembled sequentially.
You can define entities in tags. You also have all the #defines available as
entities.
Please note that all tags must be lowercase to use the DocBook XML DTD.
@@-<article>
<sect1>
<title>Quick Reference</title>
<!-- The refentry forms a manpage -->
<refentry>
<refmeta>
<manvolnum>5<manvolnum>
</refmeta>
<refnamdiv>
<refname>&progname;</refname>
<refpurpose>&SUMMARY;</refpurpose>
</refnamdiv>
</refentry>
</sect1>
<sect1>
<title>FAQ</title>
</sect1>
<sect1>
<title>Theory, Installation, and Operation</title>
<sect2>
<title>General Description</title>
<para>
&DESCRIPTION;
</para>
</sect2>
<sect2>
<title>Future Enhancements</title>
<para>Todo List</para>
<itemizedlist>
<listitem>Add option to get password from a secured file rather than the command line</listitem>
</itemizedlist>
</sect2>
<sect2>
<title>Functions</title>
-@@
******************************************************************************/
int
main (int argc, char **argv)
{
UINT4 service;
char msg[BUFFER_LEN];
SEND_DATA data;
int result = STATE_UNKNOWN;
UINT4 client_id;
char *str;
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
if (process_arguments (argc, argv) == ERROR)
usage4 (_("Could not parse arguments"));
str = strdup ("dictionary");
if ((config_file && my_rc_read_config (config_file)) ||
my_rc_read_dictionary (my_rc_conf_str (str)))
die (STATE_UNKNOWN, _("Config file error"));
service = PW_AUTHENTICATE_ONLY;
memset (&data, 0, sizeof(data));
if (!(my_rc_avpair_add (&data.send_pairs, PW_SERVICE_TYPE, &service, 0) &&
my_rc_avpair_add (&data.send_pairs, PW_USER_NAME, username, 0) &&
my_rc_avpair_add (&data.send_pairs, PW_USER_PASSWORD, password, 0) &&
(nasid==NULL || my_rc_avpair_add (&data.send_pairs, PW_NAS_IDENTIFIER, nasid, 0))))
die (STATE_UNKNOWN, _("Out of Memory?"));
/*
* Fill in NAS-IP-Address
*/
if ((client_id = my_rc_own_ipaddress ()) == 0)
return (ERROR_RC);
if (my_rc_avpair_add (&(data.send_pairs), PW_NAS_IP_ADDRESS, &client_id, 0) ==
NULL) return (ERROR_RC);
my_rc_buildreq (&data, PW_ACCESS_REQUEST, server, port, (int)timeout_interval,
retries);
result = my_rc_send_server (&data, msg);
rc_avpair_free (data.send_pairs);
if (data.receive_pairs)
rc_avpair_free (data.receive_pairs);
if (result == TIMEOUT_RC)
die (STATE_CRITICAL, _("Timeout"));
if (result == ERROR_RC)
die (STATE_CRITICAL, _("Auth Error"));
if (result == BADRESP_RC)
die (STATE_WARNING, _("Auth Failed"));
if (expect && !strstr (msg, expect))
die (STATE_WARNING, "%s", msg);
if (result == OK_RC)
die (STATE_OK, _("Auth OK"));
return (0);
}
/* process command-line arguments */
int
process_arguments (int argc, char **argv)
{
int c;
int option = 0;
static struct option longopts[] = {
{"hostname", required_argument, 0, 'H'},
{"port", required_argument, 0, 'P'},
{"username", required_argument, 0, 'u'},
{"password", required_argument, 0, 'p'},
{"nas-id", required_argument, 0, 'n'},
{"filename", required_argument, 0, 'F'},
{"expect", required_argument, 0, 'e'},
{"retries", required_argument, 0, 'r'},
{"timeout", required_argument, 0, 't'},
{"verbose", no_argument, 0, 'v'},
{"version", no_argument, 0, 'V'},
{"help", no_argument, 0, 'h'},
{0, 0, 0, 0}
};
while (1) {
c = getopt_long (argc, argv, "+hVvH:P:F:u:p:n:t:r:e:", longopts,
&option);
if (c == -1 || c == EOF || c == 1)
break;
switch (c) {
case '?': /* print short usage statement if args not parsable */
usage5 ();
case 'h': /* help */
print_help ();
exit (OK);
case 'V': /* version */
print_revision (progname, revision);
exit (OK);
case 'v': /* verbose mode */
verbose = TRUE;
break;
case 'H': /* hostname */
if (is_host (optarg) == FALSE) {
usage2 (_("Invalid hostname/address"), optarg);
}
server = optarg;
break;
case 'P': /* port */
if (is_intnonneg (optarg))
port = atoi (optarg);
else
usage4 (_("Port must be a positive integer"));
break;
case 'u': /* username */
username = optarg;
break;
case 'p': /* password */
password = optarg;
break;
case 'n': /* nas id */
nasid = optarg;
break;
case 'F': /* configuration file */
config_file = optarg;
break;
case 'e': /* expect */
expect = optarg;
break;
case 'r': /* retries */
if (is_intpos (optarg))
retries = atoi (optarg);
else
usage4 (_("Number of retries must be a positive integer"));
break;
case 't': /* timeout */
if (is_intpos (optarg))
timeout_interval = atoi (optarg);
else
usage2 (_("Timeout interval must be a positive integer"), optarg);
break;
}
}
if (server == NULL)
usage4 (_("Hostname was not supplied"));
if (username == NULL)
usage4 (_("User not specified"));
if (password == NULL)
usage4 (_("Password not specified"));
if (config_file == NULL)
usage4 (_("Configuration file not specified"));
return OK;
}
void
print_help (void)
{
char *myport;
asprintf (&myport, "%d", PW_AUTH_UDP_PORT);
print_revision (progname, revision);
printf ("Copyright (c) 1999 Robert August Vincent II\n");
printf (COPYRIGHT, copyright, email);
printf("%s\n", _("Tests to see if a radius server is accepting connections."));
printf ("\n\n");
print_usage ();
printf (_(UT_HELP_VRSN));
printf (_(UT_HOST_PORT), 'P', myport);
printf (" %s\n", "-u, --username=STRING");
printf (" %s\n", _("The user to authenticate"));
printf (" %s\n", "-p, --password=STRING");
printf (" %s\n", _("Password for autentication (SECURITY RISK)"));
printf (" %s\n", "-n, --nas-id=STRING");
printf (" %s\n", _("NAS identifier"));
printf (" %s\n", "-F, --filename=STRING");
printf (" %s\n", _("Configuration file"));
printf (" %s\n", "-e, --expect=STRING");
printf (" %s\n", _("Response string to expect from the server"));
printf (" %s\n", "-r, --retries=INTEGER");
printf (" %s\n", _("Number of times to retry a failed connection"));
printf (_(UT_TIMEOUT), timeout_interval);
printf ("%s\n", _("This plugin tests a radius server to see if it is accepting connections."));
printf ("%s\n", _("The server to test must be specified in the invocation, as well as a user"));
printf ("%s\n", _("name and password. A configuration file may also be present. The format of"));
printf ("%s\n", _("the configuration file is described in the radiusclient library sources."));
printf ("%s\n", _("The password option presents a substantial security issue because the"));
printf ("%s\n", _("password can be determined by careful watching of the command line in"));
printf ("%s\n", _("a process listing. This risk is exacerbated because nagios will"));
printf ("%s\n", _("run the plugin at regular prdictable intervals. Please be sure that"));
printf ("%s\n", _("the password used does not allow access to sensitive system resources,"));
printf ("%s\n", _("otherwise compormise could occur."));
printf (_(UT_SUPPORT));
}
void
print_usage (void)
{
printf (_("Usage:"));
printf ("%s -H host -F config_file -u username -p password [-n nas-id] [-P port]\n\
[-t timeout] [-r retries] [-e expect]\n", progname);
}
int my_rc_read_config(char * a)
{
#ifdef HAVE_LIBRADIUSCLIENT_NG
rch = rc_read_config(a);
return (rch == NULL) ? 1 : 0;
#else
return rc_read_config(a);
#endif
}
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