help with socket programming ???

[vp pan]

i am doing a project on GPRS communication

my project requires sending a string of data from PC to a mobile

the MOBILE service provider i use uses a WAP GATEWAY so i cannot connect to it

because the IP address of the mobile is hidden behind the gateway


so i changed it to that the mobile will connect to the PC
i am able to establish the connection and the string of data is going to PC
but the response i.e " data recieved"
should be sent but how do i send the repsone

please tell me because i do not know the IP ADDRESS OF THE MOBILE ???

please help me with code if you can because i am new to J2ME or please explain me the logic atleast

[Ernest Friedman-Hill]

Hi,

Welcome to JavaRanch!

Presumably you've created a ServerSocket on the PC, right? You call accept(), and when the mobile connects you get a Socket. The Socket is a two-way connection endpoint: you can read from it as well as write to it. Likewise, the Socket that the mobile is sending on, it should also be able to read from. You don't close the connection until everybody is through.

You use Socket.getInputStream() to get a stream you read from; you use Socket.getOutputStream() to get one that you write to.

[vp pan]

thanks for the reply
will the GATEWAY part will be handled automatically by the JVM

is this what you mean to say

that if the mobile establishes

client.java ( on the mobile)
------------------

all imports

 
      try { 
     
    Socket s = new Socket(args[0],11100);
     
    InputStream in = null;
    in = s.getInputStream();
    OutputStream out = null;
    out= s.getOutputStream();  
 

--------------
server.java (on the PC)
---------------

 
      try { 
         ServerSocket s;
             s=new ServerSocket(11100);
     
        InputStream in1=null;
         OutputStream out1=null;
         
         while(cls)
         { 
         
         
         Socket socket=s.accept();
         
         
         in1=socket.getInputStream();
         out1=socket.getOutputStream();