/*
 * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
 * All rights reserved. 
 * 
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
 * OF SUCH DAMAGE.
 *
 * This file is part of the lwIP TCP/IP stack.
 * 
 * Author: Adam Dunkels <adam@sics.se>
 *
 */


#include "lwip/opt.h"

#if LWIP_NETCONN

#include "lwip/sys.h"
#include "lwip/api.h"

#define TCPECHO_THREAD_PRIO  ( tskIDLE_PRIORITY + 3 )



/*-----------------------------------------------------------------------------------*/
static void tcpecho_thread(void *arg)
{
  struct netconn *conn, *newconn;
  err_t err;

  LWIP_UNUSED_ARG(arg);

  /* Create a new connection identifier. */
  conn = netconn_new(NETCONN_TCP);
  
  if (conn!=NULL)
  {  
    /* Bind connection to well known port number 7. */
    err = netconn_bind(conn, NULL, 7);
    
    if (err == ERR_OK)
    {
      /* Tell connection to go into listening mode. */
      netconn_listen(conn);
    
      while (1) 
      {
        /* Grab new connection. */
        newconn = netconn_accept(conn);
    
        /* Process the new connection. */
        if (newconn) 
        {
          struct netbuf *buf;
          void *data;
          u16_t len;
      
          while ((buf = netconn_recv(newconn)) != NULL) 
          {
            do 
            {
              netbuf_data(buf, &data, &len);
              netconn_write(newconn, data, len, NETCONN_COPY);
          
            } 
            while (netbuf_next(buf) >= 0);
          
            netbuf_delete(buf);
          }
        
          /* Close connection and discard connection identifier. */
          netconn_close(newconn);
          netconn_delete(newconn);
        }
      }
    }
    else
    {
      printf(" can not bind TCP netconn");
    }
  }
  else
  {
    printf("can not create TCP netconn");
  }
}
/*-----------------------------------------------------------------------------------*/

void tcpecho_init(void)
{
  sys_thread_new("tcpecho_thread", tcpecho_thread, NULL, DEFAULT_THREAD_STACKSIZE, TCPECHO_THREAD_PRIO);
}
/*-----------------------------------------------------------------------------------*/

void cmd_tcpecho(int argc, char **argv)
{
	printf("\n\rInit TCP ECHO Server ...");
	tcpecho_init();
	printf("\n\r\nPlease use echotool to connect to this echo server. ex. echotool 192.168.0.1 /p tcp /r 7 /n 0");
}
#endif /* LWIP_NETCONN */
