www.pudn.com > Net_apps.rar > udpecho.c

/* 
 * 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  
 * 
 */ 
 
#include "..\include\L1\lwip\api.h" 
#include "..\include\L1\lwip\sys.h" 
 
#include "..\drive\include\drive.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); 
    netbuf_copy(buf, buffer, buf->p->tot_len); 
    buffer[buf->p->tot_len] = '\0'; 
    netconn_send(conn, buf); 
    printf("got %s\n", buffer); 
    netbuf_delete(buf); 
  } 
} 
/*-----------------------------------------------------------------------------------*/ 
void 
udpecho_init(void) 
{ 
  sys_thread_new(udpecho_thread, NULL, LWIP_START_PRIO+UDPECHO_THREAD); 
}