Need to communicate c server on linux & java client on windows

Question

Hi!! I am new to socket programing in both C and Java.
From let I downloaded some client server example for c and java and tried that to link !! (I allways learn this way , and I need to do that little urget )
though cient server in linux is working perfectly fine and same for java. But problem is when I tried to communicate C server on linux and java client on windows, I end up with getting some junk characters. Though they are connected successfully.
Here goes code for java client:
package whatever;
import java.io.*;
import java.net.*;
public class Requester{
     Socket requestSocket;
     ObjectOutputStream out;
     ObjectInputStream in;
     String message;
     Requester(){}
     void run()
          try{
               //1. creating a socket to connect to the server
               requestSocket = new Socket("192.168.72.128", 2006);
               System.out.println("Connected to localhost in port 2004");
               //2. get Input and Output streams
               out = new ObjectOutputStream(requestSocket.getOutputStream());
               out.flush();
               in = new ObjectInputStream(requestSocket.getInputStream());
               System.out.println("above do");
               //3: Communicating with the server
               do{
                    try{
                         System.out.println("in do");
                         //message = (String)in.readObject();
                         System.out.println("in try");
                         //System.out.println("server>" + message);
                         System.out.println("server>" + "message");
                         sendMessage("Hi my server");
                         message = "bye";
                         sendMessage(message);
                         System.out.println("try completed");
                    catch(Exception e){
                         e.printStackTrace();
               }while(!message.equals("bye"));
          catch(UnknownHostException unknownHost){
               System.err.println("You are trying to connect to an unknown host!");
          catch(IOException ioException){
               ioException.printStackTrace();
          finally{
               //4: Closing connection
               try{
                    in.close();
                    out.close();
                    requestSocket.close();
               catch(IOException ioException){
                    ioException.printStackTrace();
     void sendMessage(String msg)
          try{
               String stringToConvert= "hello world";
               byte[] theByteArray = stringToConvert.getBytes();
                  System.out.println(theByteArray.length);
               out.writeObject(theByteArray);
               out.flush();
               System.out.println("client>" + msg);
          catch(IOException ioException){
               ioException.printStackTrace();
          catch(Exception ex){
               ex.printStackTrace();
     public static void main(String args[])
          Requester client = new Requester();
          client.run();
And for C server
/ server
    #include <stdio.h>
        #include <sys/socket.h>
        #include <arpa/inet.h>
        #include <stdlib.h>
        #include <string.h>
        #include <unistd.h>
        #include <netinet/in.h>
        #define MAXPENDING 5    /* Max connection requests */
        #define BUFFSIZE 32
        void Die(char *mess) { perror(mess); exit(1); }
    void HandleClient(int sock) {
            char buffer[BUFFSIZE];
            int received = -1;
            /* Receive message */
            if ((received = recv(sock, buffer, BUFFSIZE, 0)) < 0) {
                Die("Failed to receive initial bytes from client");
            /* Send bytes and check for more incoming data in loop */
            while (received > 0) {
            /* Send back received data */
                if (send(sock, buffer, received, 0) != received) {
                    Die("Failed to send bytes to client");
//            fprintf("%s",buffer);
            fprintf(stdout, "message Recieved: %s\n", buffer);
                //Die("was not able to echo socket message");               
            /* Check for more data */
                if ((received = recv(sock, buffer, BUFFSIZE, 0)) < 0) {
                    Die("Failed to receive additional bytes from client");
            close(sock);
    //     A TCP ECHO SERVER
    int main(int argc, char *argv[]) {
            int serversock, clientsock;
                struct sockaddr_in echoserver, echoclient;
                if (argc != 2) {
                  fprintf(stderr, "USAGE: echoserver <port>\n");
                exit(1);
            /* Create the TCP socket */
                if ((serversock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
                  Die("Failed to create socket");
            /* Construct the server sockaddr_in structure */
                memset(&echoserver, 0, sizeof(echoserver));      /* Clear struct */
                echoserver.sin_family = AF_INET;                  /* Internet/IP */
                echoserver.sin_addr.s_addr = htonl(INADDR_ANY);  /* Incoming addr */
                echoserver.sin_port = htons(atoi(argv[1]));      /* server port */
    // A TCP ECHO SERVER ENDS
    // A TCP ECHO SERVER BINDING AND LISTNING
  /* Bind the server socket */
              if (bind(serversock, (struct sockaddr *) &echoserver, sizeof(echoserver)) < 0) {
                    Die("Failed to bind the server socket");
          /* Listen on the server socket */
              if (listen(serversock, MAXPENDING) < 0) {
              Die("Failed to listen on server socket");
    // A TCP ECHO SERVER BINDING AND LISTNING
    // SOCKET FACTORY
/* Run until cancelled */
            while (1) {
                    unsigned int clientlen = sizeof(echoclient);
                      /* Wait for client connection */
                    if ((clientsock =
                      accept(serversock, (struct sockaddr *) &echoclient, &clientlen)) < 0) {
                        Die("Failed to accept client connection");
                      fprintf(stdout, "Client connected: %s\n", inet_ntoa(echoclient.sin_addr));
                      HandleClient(clientsock);
    // SOCKET FACTORY ENDSI know that it is not C forum but I found no better place to post it
Thanks

Answer 1

kajbj wrote:
ManMohanVyas wrote:
hii!! just trying to make it a little more explinatory
1) what I am trying to accomplish by the above code is: - just need to echo/print from the Server , message send by the Client. I know code is not that good but should be able to perform this basic operation( according to me ).You are wrong. I told you that it won't work as long as you are using ObjectOutputStream and ObjectInputStream. You shouldn't write objects.
2) Message sent by the client is "hello world"(hard coded).No, it's not. You are writing a serialized byte array.
3) what I am getting at the client end is "*message recieved: ur*" (before that It shows the Ip of client machine)
It should print "hello world ".See above.
You are having a problem, and I have told you what the problem is.hey I dont know what went wrong but . I posted all this just next to my first post ...before you posted !!
And hard coded byte array includes "hello world"...may be I am not able to explain properly.