[SNMP4J] Cannot retrieve the information from SNMP Host

[Frank Fock]

Hi Chris,

OIDs are specified without a leading dot! The notation you used is
a non-standard way from NET-SNMP to specify OIDs.

Best regards,
Frank

Chris Kam wrote:

>Hi all,
> I am very new to SNMP4J and I want to use JAVA to help me getting the disk
>space of each servers (over 70) each morning. You know it's hard to get
>those information by checking if from the local console one by one. I did
>read some reference and wrote a program as below, but I cannot get what i
>want. Can canone help me to see what should I change and what's wrong with
>it. I have no idea on my program after read all the materials that I can
>search on the net. Thanks a lot.
> Chris Kam
> P.S. I can read the source text file sucessfully and get the correct ip
>address, just donno what happened with the codes that related to SNMP4J.
>
>import java.io.*;
>import java.lang.*;
>import java.util.*;
>import java.net.*;
>
>import org.snmp4j.*;
>import org.snmp4j.smi.*;
>import org.snmp4j.transport.*;
>import org.snmp4j.security.*;
>import org.snmp4j.event.*;
>import org.snmp4j.log.*;
>import org.snmp4j.mp.*;
>
>public class diskspacechecker
>{
>//Variable Declaration
>public static String community;
>public static BufferedReader inputstream;
>public static FileReader instream;
>public static BufferedWriter outputstream;
>public static FileWriter outstream;
>public static boolean fileexist = true;
>public static String[] source;
>public static String[][] inputinfo;
>public static String[][] outputinfo;
>public static int no_of_servers;
>
>//protected org.snmp4j.snmp msnmp = null;
>protected String obj_identifier_oid = ".1.3.6.1.2.1.25.2.3.1.2.";
>protected String display_string_oid = ".1.3.6.1.2.1.25.2.3.1.3.";
>protected String storage_size_oid = ".1.3.6.1.2.1.25.2.3.1.5.";
>protected String storage_used_oid = ".1.3.6.1.2.1.25.2.3.1.6.";
>
>public static void main (String[] args) throws IOException
>{
>//Ask for the SNMP community string for connection use.
>System.out.print("Please enter the community string: ");
>community = EasyIn.getString();
>System.out.println("Your community string is " + community);
>
>//Open the source file of server list. (serverlist.txt in csv format)
>try
>{
>File serverlist = new File("serverlist.txt");
>instream = new FileReader(serverlist);
>inputstream = new BufferedReader(instream);
>
>String line = inputstream.readLine();
>while(line != null)
>{
>no_of_servers++;
>line = inputstream.readLine();
>}
>inputstream.close();
>instream.close();
>}
>catch (FileNotFoundException e)
>{
>System.out.println();
>System.out.println("The source file serverlist.txt does not exist, please
>check.");
>System.out.println();
>System.exit(-1);
>}
>
>//System.out.println(no_of_servers);
>
>source = new String[no_of_servers];
>inputinfo = new String[no_of_servers][2];
>outputinfo = new String[no_of_servers][4];
>
>if (no_of_servers>0)
>{
>File serverlist = new File("serverlist.txt");
>instream = new FileReader(serverlist);
>inputstream = new BufferedReader(instream);
>
>for(int i = 0; i < no_of_servers; i++)
>{
>source[i] = inputstream.readLine();
>}
>inputstream.close();
>instream.close();
>}
>else
>{
>System.out.println();
>System.out.println("The source file serverlist.txt does not contain any
>information, please check.");
>System.out.println();
>System.exit(-1);
>}
>
>
>//Prepare input info for disk space information retrieval.
>int comma_pos = 0;
>
>for(int i = 0; i < no_of_servers; i++)
>{
>for(int j = 0; j < source[i].length(); j++)
>{
>if (source[i].charAt(j) == ',')
>{
>comma_pos = j;
>break;
>}
>}
>inputinfo[i][0] = source[i].substring(0,comma_pos);
>inputinfo[i][1] = source[i].substring(comma_pos+1, source[i].length());
>}
>
>CommunityTarget target = new CommunityTarget();
>
>for(int i = 0; i < 1; i++)
>{
>
>System.out.println("Looping");
>
>
>Address targetAddress = GenericAddress.parse("udp:" + inputinfo[i][1] +
>"/162");
>
>System.out.println(targetAddress);
>
>TransportMapping transport = new DefaultUdpTransportMapping();
>Snmp snmp = new Snmp(transport);
>MPv3 mpv3 = (MPv3)snmp.getMessageProcessingModel(MessageProcessingModel.MPv3
>);
>USM usm = new USM(SecurityProtocols.getInstance(), new OctetString(
>mpv3.createLocalEngineID()), 0);
>SecurityModels.getInstance().addSecurityModel(usm);
>transport.listen();
>
>System.out.println("Before Set Community.");
>
>target.setCommunity(new OctetString(community));
>target.setAddress(targetAddress);
>target.setRetries(10);
>target.setTimeout(10000);
>target.setVersion(SnmpConstants.version1);
>
>PDU pdu = new PDU();
>pdu.add(new VariableBinding(new OID(".1.3.6.1.2.1.25.2.3.1.6.2")));
>pdu.setType(PDU.GET);
>
>ResponseListener listener = new ResponseListener()
>{
>public void onResponse(ResponseEvent e)
>{
>((Snmp) e.getSource()).cancel(e.getRequest(), this);
>System.out.println("Recieved response PDU is: " + e.getResponse());
>}
>};
>
>snmp.send(pdu,target,null,listener);
>}
>
>}
>
>}
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>
>
>  
>


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