402 lines
11 KiB
C
402 lines
11 KiB
C
/*****************************************************************************
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*
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* Nagios check_radius plugin
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*
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* License: GPL
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* Copyright (c) 1999-2008 Nagios Plugins Development Team
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*
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* Description:
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*
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* This file contains the check_radius plugin
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*
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* Tests to see if a radius server is accepting connections.
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*
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*****************************************************************************/
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const char *progname = "check_radius";
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const char *copyright = "2000-2008";
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const char *email = "nagiosplug-devel@lists.sourceforge.net";
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#include "common.h"
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#include "utils.h"
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#include "netutils.h"
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#ifdef HAVE_LIBRADIUSCLIENT_NG
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#include <radiusclient-ng.h>
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rc_handle *rch = NULL;
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#else
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#include <radiusclient.h>
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#endif
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int process_arguments (int, char **);
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void print_help (void);
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void print_usage (void);
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/* libradiusclient(-ng) wrapper functions */
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#ifdef HAVE_LIBRADIUSCLIENT_NG
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#define my_rc_conf_str(a) rc_conf_str(rch,a)
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#define my_rc_send_server(a,b) rc_send_server(rch,a,b)
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#define my_rc_buildreq(a,b,c,d,e,f) rc_buildreq(rch,a,b,c,d,e,f)
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#define my_rc_own_ipaddress() rc_own_ipaddress(rch)
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#define my_rc_avpair_add(a,b,c,d) rc_avpair_add(rch,a,b,c,-1,d)
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#define my_rc_read_dictionary(a) rc_read_dictionary(rch, a)
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#else
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#define my_rc_conf_str(a) rc_conf_str(a)
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#define my_rc_send_server(a,b) rc_send_server(a, b)
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#define my_rc_buildreq(a,b,c,d,e,f) rc_buildreq(a,b,c,d,e,f)
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#define my_rc_own_ipaddress() rc_own_ipaddress()
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#define my_rc_avpair_add(a,b,c,d) rc_avpair_add(a, b, c, d)
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#define my_rc_read_dictionary(a) rc_read_dictionary(a)
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#endif
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/* REJECT_RC is only defined in some version of radiusclient. It has
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* been reported from radiusclient-ng 0.5.6 on FreeBSD 7.2-RELEASE */
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#ifndef REJECT_RC
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#define REJECT_RC BADRESP_RC
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#endif
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int my_rc_read_config(char *);
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char *server = NULL;
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char *username = NULL;
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char *password = NULL;
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char *nasid = NULL;
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char *nasipaddress = NULL;
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char *expect = NULL;
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char *config_file = NULL;
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unsigned short port = PW_AUTH_UDP_PORT;
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int retries = 1;
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int verbose = FALSE;
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ENV *env = NULL;
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/******************************************************************************
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The (psuedo?)literate programming XML is contained within \@\@\- <XML> \-\@\@
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tags in the comments. With in the tags, the XML is assembled sequentially.
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You can define entities in tags. You also have all the #defines available as
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entities.
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Please note that all tags must be lowercase to use the DocBook XML DTD.
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@@-<article>
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<sect1>
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<title>Quick Reference</title>
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<!-- The refentry forms a manpage -->
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<refentry>
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<refmeta>
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<manvolnum>5<manvolnum>
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</refmeta>
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<refnamdiv>
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<refname>&progname;</refname>
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<refpurpose>&SUMMARY;</refpurpose>
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</refnamdiv>
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</refentry>
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</sect1>
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<sect1>
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<title>FAQ</title>
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</sect1>
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<sect1>
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<title>Theory, Installation, and Operation</title>
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<sect2>
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<title>General Description</title>
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<para>
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&DESCRIPTION;
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</para>
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</sect2>
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<sect2>
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<title>Future Enhancements</title>
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<para>Todo List</para>
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<itemizedlist>
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<listitem>Add option to get password from a secured file rather than the command line</listitem>
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</itemizedlist>
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</sect2>
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<sect2>
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<title>Functions</title>
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-@@
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******************************************************************************/
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int
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main (int argc, char **argv)
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{
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UINT4 service;
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char msg[BUFFER_LEN];
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SEND_DATA data;
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int result = STATE_UNKNOWN;
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UINT4 client_id;
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char *str;
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setlocale (LC_ALL, "");
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bindtextdomain (PACKAGE, LOCALEDIR);
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textdomain (PACKAGE);
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/* Parse extra opts if any */
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argv=np_extra_opts (&argc, argv, progname);
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if (process_arguments (argc, argv) == ERROR)
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usage4 (_("Could not parse arguments"));
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str = strdup ("dictionary");
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if ((config_file && my_rc_read_config (config_file)) ||
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my_rc_read_dictionary (my_rc_conf_str (str)))
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die (STATE_UNKNOWN, _("Config file error"));
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service = PW_AUTHENTICATE_ONLY;
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memset (&data, 0, sizeof(data));
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if (!(my_rc_avpair_add (&data.send_pairs, PW_SERVICE_TYPE, &service, 0) &&
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my_rc_avpair_add (&data.send_pairs, PW_USER_NAME, username, 0) &&
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my_rc_avpair_add (&data.send_pairs, PW_USER_PASSWORD, password, 0)
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))
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die (STATE_UNKNOWN, _("Out of Memory?"));
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if (nasid != NULL) {
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if (!(my_rc_avpair_add (&data.send_pairs, PW_NAS_IDENTIFIER, nasid, 0)))
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die (STATE_UNKNOWN, _("Invalid NAS-Identifier"));
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}
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if (nasipaddress != NULL) {
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if (rc_good_ipaddr (nasipaddress))
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die (STATE_UNKNOWN, _("Invalid NAS-IP-Address"));
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if ((client_id = rc_get_ipaddr(nasipaddress)) == 0)
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die (STATE_UNKNOWN, _("Invalid NAS-IP-Address"));
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} else {
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if ((client_id = my_rc_own_ipaddress ()) == 0)
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die (STATE_UNKNOWN, _("Can't find local IP for NAS-IP-Address"));
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}
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if (my_rc_avpair_add (&(data.send_pairs), PW_NAS_IP_ADDRESS, &client_id, 0) == NULL)
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die (STATE_UNKNOWN, _("Invalid NAS-IP-Address"));
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my_rc_buildreq (&data, PW_ACCESS_REQUEST, server, port, (int)timeout_interval,
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retries);
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result = my_rc_send_server (&data, msg);
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rc_avpair_free (data.send_pairs);
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if (data.receive_pairs)
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rc_avpair_free (data.receive_pairs);
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if (result == TIMEOUT_RC)
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die (STATE_CRITICAL, _("Timeout"));
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if (result == ERROR_RC)
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die (STATE_CRITICAL, _("Auth Error"));
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if (result == REJECT_RC)
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die (STATE_WARNING, _("Auth Failed"));
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if (result == BADRESP_RC)
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die (STATE_WARNING, _("Bad Response"));
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if (expect && !strstr (msg, expect))
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die (STATE_WARNING, "%s", msg);
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if (result == OK_RC)
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die (STATE_OK, _("Auth OK"));
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(void)snprintf(msg, sizeof(msg), _("Unexpected result code %d"), result);
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die (STATE_UNKNOWN, "%s", msg);
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}
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/* process command-line arguments */
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int
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process_arguments (int argc, char **argv)
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{
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int c;
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int option = 0;
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static struct option longopts[] = {
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{"hostname", required_argument, 0, 'H'},
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{"port", required_argument, 0, 'P'},
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{"username", required_argument, 0, 'u'},
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{"password", required_argument, 0, 'p'},
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{"nas-id", required_argument, 0, 'n'},
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{"nas-ip-address", required_argument, 0, 'N'},
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{"filename", required_argument, 0, 'F'},
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{"expect", required_argument, 0, 'e'},
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{"retries", required_argument, 0, 'r'},
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{"timeout", required_argument, 0, 't'},
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{"verbose", no_argument, 0, 'v'},
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{"version", no_argument, 0, 'V'},
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{"help", no_argument, 0, 'h'},
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{0, 0, 0, 0}
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};
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while (1) {
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c = getopt_long (argc, argv, "+hVvH:P:F:u:p:n:N:t:r:e:", longopts,
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&option);
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if (c == -1 || c == EOF || c == 1)
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break;
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switch (c) {
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case '?': /* print short usage statement if args not parsable */
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usage5 ();
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case 'h': /* help */
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print_help ();
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exit (OK);
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case 'V': /* version */
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print_revision (progname, NP_VERSION);
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exit (OK);
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case 'v': /* verbose mode */
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verbose = TRUE;
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break;
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case 'H': /* hostname */
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if (is_host (optarg) == FALSE) {
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usage2 (_("Invalid hostname/address"), optarg);
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}
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server = optarg;
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break;
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case 'P': /* port */
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if (is_intnonneg (optarg))
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port = atoi (optarg);
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else
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usage4 (_("Port must be a positive integer"));
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break;
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case 'u': /* username */
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username = optarg;
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break;
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case 'p': /* password */
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password = strdup(optarg);
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/* Delete the password from process list */
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while (*optarg != '\0') {
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*optarg = 'X';
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optarg++;
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}
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break;
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case 'n': /* nas id */
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nasid = optarg;
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break;
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case 'N': /* nas ip address */
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nasipaddress = optarg;
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break;
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case 'F': /* configuration file */
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config_file = optarg;
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break;
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case 'e': /* expect */
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expect = optarg;
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break;
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case 'r': /* retries */
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if (is_intpos (optarg))
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retries = atoi (optarg);
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else
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usage4 (_("Number of retries must be a positive integer"));
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break;
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case 't': /* timeout */
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if (is_intpos (optarg))
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timeout_interval = atoi (optarg);
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else
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usage2 (_("Timeout interval must be a positive integer"), optarg);
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break;
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}
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}
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if (server == NULL)
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usage4 (_("Hostname was not supplied"));
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if (username == NULL)
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usage4 (_("User not specified"));
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if (password == NULL)
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usage4 (_("Password not specified"));
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if (config_file == NULL)
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usage4 (_("Configuration file not specified"));
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return OK;
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}
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void
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print_help (void)
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{
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char *myport;
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xasprintf (&myport, "%d", PW_AUTH_UDP_PORT);
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print_revision (progname, NP_VERSION);
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printf ("Copyright (c) 1999 Robert August Vincent II\n");
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printf (COPYRIGHT, copyright, email);
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printf("%s\n", _("Tests to see if a RADIUS server is accepting connections."));
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printf ("\n\n");
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print_usage ();
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printf (UT_HELP_VRSN);
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printf (UT_EXTRA_OPTS);
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printf (UT_HOST_PORT, 'P', myport);
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printf (" %s\n", "-u, --username=STRING");
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printf (" %s\n", _("The user to authenticate"));
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printf (" %s\n", "-p, --password=STRING");
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printf (" %s\n", _("Password for autentication (SECURITY RISK)"));
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printf (" %s\n", "-n, --nas-id=STRING");
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printf (" %s\n", _("NAS identifier"));
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printf (" %s\n", "-N, --nas-ip-address=STRING");
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printf (" %s\n", _("NAS IP Address"));
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printf (" %s\n", "-F, --filename=STRING");
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printf (" %s\n", _("Configuration file"));
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printf (" %s\n", "-e, --expect=STRING");
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printf (" %s\n", _("Response string to expect from the server"));
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printf (" %s\n", "-r, --retries=INTEGER");
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printf (" %s\n", _("Number of times to retry a failed connection"));
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printf (UT_TIMEOUT, timeout_interval);
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printf ("\n");
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printf ("%s\n", _("This plugin tests a RADIUS server to see if it is accepting connections."));
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printf ("%s\n", _("The server to test must be specified in the invocation, as well as a user"));
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printf ("%s\n", _("name and password. A configuration file may also be present. The format of"));
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printf ("%s\n", _("the configuration file is described in the radiusclient library sources."));
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printf ("%s\n", _("The password option presents a substantial security issue because the"));
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printf ("%s\n", _("password can possibly be determined by careful watching of the command line"));
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printf ("%s\n", _("in a process listing. This risk is exacerbated because nagios will"));
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printf ("%s\n", _("run the plugin at regular predictable intervals. Please be sure that"));
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printf ("%s\n", _("the password used does not allow access to sensitive system resources."));
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printf (UT_SUPPORT);
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}
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void
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print_usage (void)
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{
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printf ("%s\n", _("Usage:"));
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printf ("%s -H host -F config_file -u username -p password\n\
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[-P port] [-t timeout] [-r retries] [-e expect]\n\
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[-n nas-id] [-N nas-ip-addr]\n", progname);
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}
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int my_rc_read_config(char * a)
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{
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#ifdef HAVE_LIBRADIUSCLIENT_NG
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rch = rc_read_config(a);
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return (rch == NULL) ? 1 : 0;
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#else
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return rc_read_config(a);
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#endif
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}
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