URGENT : Nichestack TCP/IP in NIOS II

Please stop posting the same question over and over again, it won't get you more answers. At least tell us what your problem is, we won't do your homework for you. "it gives error" is rather vague.

The reason why i have posted the same question so many times is my project submission date getting close and i havnt been able to find any help in solving out the problem and i apologize for the same .

As Daixiwen wrote before we can't help you if you don't post the failure messages. Giving us the source code and not telling us what the problem really is doesn't help us to help you!

if you expect help it would be really useful to post the error.

Hi... I undertand you... I agree with Urmel and karsten. But, on the other hand, I have the same problem that you have. I'm developing a distributed data acquiring system, which uses a Ciclone 3 (NEEK) and have no ideia about how to perform a client socket, because the example shows how to do a server socket. If you get any results, shows me... ([email protected]). I already know how to draw into LCD, I may help you with that... (see my youtube video youtube.com/user/dmpeletronic#p/a/u/0/hDX___9-7II )

The bsd sockets (http://en.wikipedia.org/wiki/bsd_socket) wikipedia page shows code examples with both server and client sockets, using UDP or TCP.

@dmpelectronic:

...
clientService.sin_addr.s_addr = inet_addr("127.0.0.1");
clientService.sin_port = htons(55555);
...

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 ;
}

My project is to send real time data captured by radar to the client. The data is saved in a .txt file which may contain both characters and integers. I have added the following code for file open and read on SERVER side.

char sendbuf;
char recvbuf = "";
fp = fopen("/mnt/host/test.txt", "r");
if(fp==NULL)
{
	printf("cannot open file\n");
}
else
{
fgets(sendbuf,199,fp);
}
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);
    }
fclose(fp);

FILE *fp;
	   fp = fopen ("c:\\test1.txt","w");
	   if(fp==NULL)
         {
	        printf("cannot open file\n");
         }
       else
         {
             fputs(recvbuf,fp);
			 
	     }
       fclose(fp);

Socket created
Bind is OK
Listen is OK
accepted connection request

Probably a silly point, but the hostfs filesystem only works when "debugging" the code, not just executing it. The filesystem, itself, relies on the gdb debug channel to connect to the host.