URGENT : Nichestack TCP/IP in NIOS II

Hello Daixiwen and Umel. I studied the BSD socket and thanks to your suggestion i managed to make my NIOS board as server. i Run the server program in NIOS II eclipse. I could successfully send data to the client with the following code.

#include <stdio.h>
# include <string.h>
# include <ctype.h> 
/* MicroC/OS-II definitions */
# include "includes.h"
/* Simple Socket Server definitions */
# include "simple_socket_server.h"                                                                    
# include "alt_error_handler.h"
/* Nichestack definitions */
# include "ipport.h"
# include "tcpport.h"
# define MAXDATASIZE 200
void SSSSimpleSocketServerTask()
{
	int sockfd, acceptsocket, addrlen;
	struct sockaddr_in server_addr, client_addr;
	addrlen = sizeof(client_addr);
	
	
	  if ((sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
	   {
	     alt_NetworkErrorHandler(EXPANDED_DIAGNOSIS_CODE," Socket creation failed");
	   }
	  else
	  {
		  printf("Socket created");
	  }
	  server_addr.sin_family = AF_INET;
	  server_addr.sin_port = htons(SSS_PORT);
	  server_addr.sin_addr.s_addr = INADDR_ANY;
	  memset(&(server_addr.sin_zero), '\0', 8);
	  if ((bind(sockfd,(struct sockaddr *)&server_addr,sizeof(server_addr))) < 0)
	    {
	      alt_NetworkErrorHandler(EXPANDED_DIAGNOSIS_CODE," Bind failed");
	    }
	  else
	    {
	      printf("Bind is OK\n");
	    }
	  if ((listen(sockfd,5)) < 0)
	    {
	      alt_NetworkErrorHandler(EXPANDED_DIAGNOSIS_CODE," Listen failed");
	    }
	  else
	  {
		  printf("Listen is OK\n");
	    }
while(1)
{
      
      if ((acceptsocket = accept(sockfd,(struct sockaddr *)&client_addr,&addrlen)) < 0)
           {
               alt_NetworkErrorHandler(EXPANDED_DIAGNOSIS_CODE,"accept failed");
           }
      else
      {
    	  printf("accepted connection request\n");
      }
      sockfd = acceptsocket;
      break;
}
int long bytes_sent;
int long bytes_recv;
char sendbuf = "This is a test string from server";
char recvbuf = "";
printf("Server: Sending some test data to client...\n");
bytes_sent = send(sockfd, sendbuf, strlen(sendbuf), 0);
if((bytes_sent = send(acceptsocket,sendbuf,strlen(sendbuf),0)) < 0)
  {
    printf("SERVER : send failed.\n");
    }
    else
    {
          printf("SERVER : Send is OK \n");
	      printf("SERVER : Bytes sent:%ld.\n",bytes_sent);
    }
    if((bytes_recv=recv(acceptsocket,recvbuf,200,0))<0)
    {
    	  printf("SERVER : receive failed.\n");
    }
    else
    {
  	      printf("SERVER: recv() is OK.\n");
          printf("SERVER: Received data is: \"%s\"\n", recvbuf);
          printf("SERVER: Bytes received: %ld.\n", bytes_recv);
    }
return ;
}

The above code successfully send the string "This is a test string from server" shows the number of bytes sent/received. But i have to read data stored in a file. Please read my next post.I have mentioned my problem. Thank you.!!