자바 와 C 간의 소켓통신... ( 내용 다시; )

#include <string.h>
#include <stdio.h>
 
#include <sys/socket.h>
#include <sys/types.h>
 
#include <netinet/in.h>  
#include <arpa/inet.h>
#include <errno.h>
 
 
#define PORT 6331
#define BUFSIZE        32
 
 
 
unsigned char buf[BUFSIZE];
 
 
int readline(int , void *, int );
 
int main() {
 
	int server_sd,client_sd;
	int nbyte=0;
	unsigned long client_len;
	int i,j;
 
	i=0;
	struct sockaddr_in server_addr,client_addr;
 
	bzero(&server_addr,sizeof(server_addr));
	bzero(&client_addr,sizeof(client_addr));
 
	bzero(buf,BUFSIZE);
 
	memset((unsigned char*)&buf,0x00,BUFSIZE );
 
	/* 소켓생성 */
	if ( (server_sd=socket(AF_INET,SOCK_STREAM,0)) < 0 ) {
			perror("Socket create error : ");
			return -1;
	}
 
	/* 소켓 초기화 *
	if( (init_sock(server_sd,SO_REUSEPORT))==-1) {
			perror("init_sock error");
			return -1;
	} else 
		fprintf(stderr,"소켓 초기화 완료\n");
	*/
 
	server_addr.sin_family=AF_INET;
	server_addr.sin_port=htons(PORT);
	server_addr.sin_addr.s_addr=htonl(INADDR_ANY);
 
	fprintf(stderr,"using PORT / [%d]\n",PORT);
 
	if( bind(server_sd,(struct sockaddr*)&server_addr,sizeof(server_addr)) < 0) {
		perror("socket bind error ");
		close(server_sd);
		return -1;
	}
 
	listen(server_sd,1);
	client_len=sizeof(client_addr);
 
	fprintf(stderr,"대기중...\n");
 
	if( (client_sd=accept(server_sd,(struct sockaddr *)&client_addr,&client_len)) < 0) {
		perror("Accept Error ");
		return -1;
	} else printf("client connect...\n");
 
	fprintf(stderr,"client_sd : %d\n",client_sd);
 
	while(1) {
		nbyte=read(client_sd,buf,BUFSIZE);
		fprintf(stderr,"[%d] read size : %d\n",i++,nbyte);
		sleep(1);
	}
 
	close(client_sd);
	close(server_sd);
 
	return 0;
}

import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;
 
public class SocketTest {
 
	public static void main(String args[]) throws IOException {
		Socket socket;
 
		socket = new Socket("211.54.12.239",6331);
 
		OutputStream os;
 
		os = socket.getOutputStream();
 
		byte[] b = new byte[2];
		b[0]=(byte)0x10;			
 
		os.write(b);
 
		socket.close();	
	}
}