Reading Socket!!

[arun mahajan]

Hello Everybody,

I get stuck up in the following code. I am trying to do the following:

1. Making a connection
2. Writing something on it.
3. Reading from the socket.

Surprisingly while trying to read from the socket it fails toread anything in first attempt. Even trying available() method returns 00. but a subsequent reading always gives me the data back available on the socket. Though even in this attempt the available() method returns 0.

Why it is showing such a behaviour? Am I doing something wrong? Can you pl help me

regards,
Arun

import java.io.DataInputStream;
import java.io.BufferedInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.net.SocketException;
import java.net.UnknownHostException;
 

public class SmscClient
{
 
private int smscType=0;
private boolean soTimeOut = false;
 
public SmscClient(){}
 

public static void main(String[] args)
{
try{
Socket smsSocket=null;
DataInputStream dis=null;
DataOutputStream dos=null;
BufferedInputStream bis = null;
SmscClient sc = new SmscClient();
 
//socket connection
smsSocket = new Socket("192.168.100.91",4000);
smsSocket.setSoTimeout(15*1000);
byte[] rs = new byte[42];
rs[0]=0x00;
rs[1]=0x00;
rs[2]=0x00;
rs[3]=0x2A;
rs[4]=0x00;
rs[5]=0x00;
rs[6]=0x00;
rs[7]=0x02;
rs[8]=0x00;
rs[9]=0x00;
rs[10]=0x00;
rs[11]=0x00;
rs[12]=0x00;
rs[13]=0x00;
rs[14]=0x00;
rs[15]=0x01;
rs[16]=0x6D;
rs[17]=0x69;
rs[18]=0x73;
rs[19]=0x74;
rs[20]=0x65;
rs[21]=0x72;
rs[22]=0x69;
rs[23]=0x63;
rs[24]=0x73;
rs[25]=0x73;
rs[26]=0x6F;
rs[27]=0x6E;
rs[28]=0x00;
rs[29]=0x70;
rs[30]=0x61;
rs[31]=0x73;
rs[32]=0x6D;
rs[33]=0x69;
rs[34]=0x73;
rs[35]=0x74;
rs[36]=0x00;
rs[37]=0x00;
rs[38]=0x34;
rs[39]=0x02;
rs[40]=0x01;
rs[41]=0x00;
 
//writing
dos = new DataOutputStream(smsSocket.getOutputStream());
dos.flush();
dos.write(rs);
dos.flush();
 
//reading
byte[] bufr = null;
byte[] retbuf = null;
 
dis = new DataInputStream(smsSocket.getInputStream());
//bis = new BufferedInputStream(smsSocket.getInputStream());
 
System.out.println("\n\n read");
 
byte buf1[] = new byte[250];
dis.read(buf1,0,buf1.length);
for(int j=0;j<buf1.length;j++)
System.out.print((int)buf1[j]);
 
System.out.println("\n\n read");
dis.read(buf1,0,buf1.length);
for(int j=0;j<buf1.length;j++)
System.out.print((int)buf1[j]);
 
System.out.println("\n\n read");
dis.read(buf1,0,buf1.length);
for(int j=0;j<buf1.length;j++)
System.out.print((int)buf1[j]);
}
catch(Exception e)
{
System.out.println("Error: "+e);
}
}
}
  

[Joel McNary]

This seems a bit beyond the beginner stage, so I'm moving it to the I/O and Streams forum. Mayhaps you'll get a better answer there.