udpecho.c

包含移植好的LWIP,以及CS8900网络芯片驱动程序

/*
 * Copyright (c) 2001, 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. Neither the name of the Institute nor the names of its contributors 
 *    may be used to endorse or promote products derived from this software 
 *    without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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 <[e-mail]>
 *
 * $Id: udpecho.c,v 1.2 2002/01/23 19:50:56 adam Exp $
 */

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

/*-----------------------------------------------------------------------------------*/
void 
udpecho_thread(void *arg)
{
  static struct netconn *conn;
  static struct netbuf *buf;
  static struct ip_addr *addr;
  static unsigned short port;
  char buffer[4096];
  
  conn = netconn_new(NETCONN_UDP);
  netconn_bind(conn, NULL, 7);

  while(1) {
    buf = netconn_recv(conn);
    addr = netbuf_fromaddr(buf);
    port = netbuf_fromport(buf);
    netconn_connect(conn, addr, port);
    netconn_send(conn, buf);
    netbuf_copy(buf, buffer, sizeof(buffer));
    printf("got %s\n", buffer);
    netbuf_delete(buf);
  }
}
/*-----------------------------------------------------------------------------------*/
void
udpecho_init(void)
{
  sys_thread_new(udpecho_thread, NULL);
}