📄 jeevesinterfaces.java

📁 无线网络管理
💻 JAVA
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// NAME//      $RCSfile: JeevesInterfaces.java,v $// DESCRIPTION//      [given below in javadoc format]// DELTA//      $Revision: 3.10 $// CREATED//      $Date: 2006/02/09 14:20:07 $// COPYRIGHT//      Westhawk Ltd// TO DO///* * Copyright (C) 1996 - 2006 by Westhawk Ltd * * Permission to use, copy, modify, and distribute this software * for any purpose and without fee is hereby granted, provided * that the above copyright notices appear in all copies and that * both the copyright notice and this permission notice appear in * supporting documentation. * This software is provided "as is" without express or implied * warranty. * author <a href="mailto:snmp@westhawk.co.uk">Tim Panton</a> */package uk.co.westhawk.servlet;import javax.servlet.*;import javax.servlet.http.*;import uk.co.westhawk.snmp.stack.*;import uk.co.westhawk.snmp.pdu.*;import java.util.*;import java.io.*;/** * <p> * When accessed, the JeevesInterfaces servlet will collect once the * information about all the interfaces on a SNMP server. It will hold the * connection until it has received the information. Then it will print * the information to your webpage. * </p> * * <p> * It supports the GET action. The following parameter should be sent * in the URL: * <ul> * <li>host - the hostname or IP address of the SNMP server, default is <em>your localhost</em></li> * </ul> * For example: * <pre> *     http:&lt;servlet URL&gt;?host=localhost * </pre> * </p> * * <p> * It will use port <em>161</em> and community name <em>public</em>. * </p> * * * @see InterfaceGetNextPdu * @author <a href="mailto:snmp@westhawk.co.uk">Tim Panton</a> * @version $Revision: 3.10 $ $Date: 2006/02/09 14:20:07 $ */public class JeevesInterfaces extends HttpServlet{    private static final String     version_id =        "@(#)$Id: JeevesInterfaces.java,v 3.10 2006/02/09 14:20:07 birgit Exp $ Copyright Westhawk Ltd";    protected void doGet(HttpServletRequest req, HttpServletResponse res)        throws ServletException, IOException    {        final int port = 161;        final String comm = "public";        InterfaceGetNextPdu intef;        int numIfs = 0;        SnmpContext context;        String [] answers = null;        String error = null;        String host = req.getParameter("host");        if (host == null)        {            host = req.getRemoteHost();            if (host == null)            {                host = "localhost";            }        }        try        {            context = new SnmpContext(host, port);            context.setCommunity(comm);            numIfs = InterfaceGetNextPdu.getIfNumber(context);            answers = new String[numIfs];            int index = 0;            for (int i=0; i<numIfs; i++)            {                // interface may not have consecutive numbers                intef = new InterfaceGetNextPdu(context);                intef.addOids(index);                intef.send();                if (intef.waitForSelf())                {                    index = intef.getIfIndex();                    answers[i] = "no " + index                               + " - " + intef.getIfDescr()                              + " - " + intef.getIfOperStatusStr();                }                else                {                    answers[i] = index + " - waited in vain";                }            }        }        catch (java.io.IOException exc)        {            error = "IOException " + exc.getMessage();        }        catch (PduException exc)        {            error = "PduException " + exc.getMessage();        }        res.setStatus(res.SC_OK);        res.setContentType("text/html");        //res.writeHeaders();        PrintWriter out = res.getWriter();        out.println("<html>");        out.println("<head><title>"+getServletInfo()+"</title>");        out.println("</head><body>");        out.println("<h2>"+getServletInfo()+"</h2>");        if (error != null)        {            out.println("<p> Error " + error + "</p>");        }        else        {            out.println("<p> Host "+host+", " + numIfs + " interfaces: ");            out.println("<ul>");            if (answers != null)            {                for (int i=0; i<answers.length; i++)                {                    out.println("<li>"+answers[i]+"</li>");                }            }            out.println("</ul></p>");        }        out.println("</body></html>");        out.flush();        out.close();    }    public String getServletInfo()    {        return "Snmp Interface status checker";    }}
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