httpsmonitor.java

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//
// This file is part of the OpenNMS(R) Application.
//
// OpenNMS(R) is Copyright (C) 2002-2003 The OpenNMS Group, Inc. All rights reserved.
// OpenNMS(R) is a derivative work, containing both original code, included code and modified
// code that was published under the GNU General Public License. Copyrights for modified
// and included code are below.
//
// OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc.
//
// Modifications:
//
// 2004 May 05: Switch from SocketChannel to Socket with connection timeout.
// 2003 Jul 21: Explicitly closed socket.
// 2003 Jul 18: Enabled retries for monitors.
// 2003 Jul 02: Fixed a ClassCastException.
// 2003 Jun 11: Added a "catch" for RRD update errors. Bug #748.
// 2003 Jan 31: Added the ability to imbed RRA information in poller packages.
// 2003 Jan 31: Cleaned up some unused imports.
// 2003 Jan 29: Added response times to certain monitors.
//
// Original code base Copyright (C) 1999-2001 Oculan Corp. All rights reserved.
//
// 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// For more information contact:
//      OpenNMS Licensing <[e-mail]>
//      http://www.opennms.org/
//      http://www.opennms.com/
//
// Tab Size = 8
//

package org.opennms.netmgt.poller.monitors;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.InterruptedIOException;
import java.net.ConnectException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.NoRouteToHostException;
import java.net.Socket;
import java.security.Security;
import java.util.Map;
import java.util.StringTokenizer;

import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;

import org.apache.log4j.Category;
import org.opennms.core.utils.ThreadCategory;
import org.opennms.netmgt.utils.ParameterMap;
import org.opennms.netmgt.utils.RelaxedX509TrustManager;

/**
 * This class is designed to be used by the service poller framework to test the
 * availability of the HTTPS service on remote interfaces. The class implements
 * the ServiceMonitor interface that allows it to be used along with other
 * plug-ins by the service poller framework.
 * 
 * @author <A HREF="http://www.opennms.org/">OpenNMS </A>
 * @author <A HREF="mailto:[e-mail]">Tarus Balog </A>
 * @author <A HREF="mailto:[e-mail]">Jason </A>
 * 
 */
final public class HttpsMonitor extends IPv4LatencyMonitor {

    /**
     * Default HTTPS ports.
     */
    private static final int[] DEFAULT_PORTS = { 443 };

    /**
     * Default retries.
     */
    private static final int DEFAULT_RETRY = 0;

    /**
     * Default URL to 'GET'
     */
    private static final String DEFAULT_URL = "/";

    /**
     * Default timeout. Specifies how long (in milliseconds) to block waiting
     * for data from the monitored interface.
     */
    private static final int DEFAULT_TIMEOUT = 30000; // 30 second timeout on
                                                        // read()

    /**
     * Poll the specified address for HTTPS service availability.
     * 
     * During the poll an attempt is made to connect on the specified port(s)
     * (by default TCP port 443). If the connection request is successful, an
     * HTTP 'GET' command is sent to the interface. The response is parsed and a
     * return code extracted and verified. Provided that the interface's
     * response is valid we set the service status to SERVICE_AVAILABLE and
     * return.
     * 
     * @param iface
     *            The network interface to test the service on.
     * @param parameters
     *            The package parameters (timeout, retry, etc...) to be used for
     *            this poll.
     * 
     * @return The availibility of the interface and if a transition event
     *         should be supressed.
     * 
     */
    public int poll(NetworkInterface iface, Map parameters, org.opennms.netmgt.config.poller.Package pkg) {
        //
        // Get interface address from NetworkInterface
        //
        if (iface.getType() != NetworkInterface.TYPE_IPV4)
            throw new NetworkInterfaceNotSupportedException("Unsupported interface type, only TYPE_IPV4 currently supported");

        Category log = ThreadCategory.getInstance(getClass());

        int retry = ParameterMap.getKeyedInteger(parameters, "retry", DEFAULT_RETRY);
        int timeout = ParameterMap.getKeyedInteger(parameters, "timeout", DEFAULT_TIMEOUT);
        int[] ports = ParameterMap.getKeyedIntegerArray(parameters, "port", DEFAULT_PORTS);
        String url = ParameterMap.getKeyedString(parameters, "url", DEFAULT_URL);
        String rrdPath = ParameterMap.getKeyedString(parameters, "rrd-repository", null);
        String dsName = ParameterMap.getKeyedString(parameters, "ds-name", null);

        if (rrdPath == null) {
            log.info("poll: RRD repository not specified in parameters, latency data will not be stored.");
        }
        if (dsName == null) {
            dsName = DS_NAME;
        }

        int response = ParameterMap.getKeyedInteger(parameters, "response", -1);
        String responseText = ParameterMap.getKeyedString(parameters, "response text", null);

        // Set to true if "response" property has a valid return code specified.
        // By default response will be deemed valid if the return code
        // falls in the range: 100 < rc < 400
        // This is based on the following information from RFC 1945 (HTTP 1.0)
        // HTTP 1.0 GET return codes:
        // 1xx: Informational - Not used, future use
        // 2xx: Success
        // 3xx: Redirection
        // 4xx: Client error
        // 5xx: Server error
        boolean bStrictResponse = (response > 99 && response < 600);

        // Extract the ip address
        //
        InetAddress ipv4Addr = (InetAddress) iface.getAddress();

        // Following a successful poll 'currentPort' will contain the port on
        // the remote host that was successfully queried
        //
        final String cmd = "GET " + url + " HTTP/1.0\r\n\r\n";

        // set properties to allow the use of SSL for the https connection
        System.setProperty("java.protocol.handler.pkgs", "com.sun.net.ssl.internal.www.protocol");
        Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());

        // Cycle through the port list
        //
        int serviceStatus = ServiceMonitor.SERVICE_UNAVAILABLE;
        long responseTime = -1;

        int currentPort = -1;
        for (int portIndex = 0; portIndex < ports.length && serviceStatus != ServiceMonitor.SERVICE_AVAILABLE; portIndex++) {
            currentPort = ports[portIndex];

            if (log.isDebugEnabled()) {