udp.c

移植到440 下的uip

/**
 * \addtogroup uip
 * @{
 */

/**
 * \defgroup uipdns uIP hostname resolver functions
 * @{
 *
 * The uIP DNS resolver functions are used to lookup a hostname and
 * map it to a numerical IP address. It maintains a list of resolved
 * hostnames that can be queried with the resolv_lookup()
 * function. New hostnames can be resolved using the resolv_query()
 * function.
 *
 * When a hostname has been resolved (or found to be non-existant),
 * the resolver code calls a callback function called resolv_found()
 * that must be implemented by the module that uses the resolver.
 */

/**
 * \file
 * DNS host name to IP address resolver.
 * \author Adam Dunkels <[e-mail]>
 * 
 * This file implements a DNS host name to IP address resolver.
 */

/*
 * Copyright (c) 2002-2003, Adam Dunkels.
 * 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 uIP TCP/IP stack.
 *
 * $Id: resolv.c,v 1.1.2.5 2003/10/06 22:56:44 adam Exp $
 *
 */

#include "udp.h"

#include <string.h>

#ifndef NULL
#define NULL (void *)0
#endif /* NULL */


static struct uip_udp_conn *resolv_conn = NULL;

/** \internal
 * The main UDP function.
/*-----------------------------------------------------------------------------------*/
extern int uHALr_printf(const char *format, ...);

void
udp_appcall(void)
{
  if(uip_udp_conn->rport == HTONS(2340)) {
    if(uip_poll()) {
    	 static u8_t flag=0;
    	 static u8_t str[100];  
    	 if(flag==0)
    	 {  
    	  uHALr_printf("请输入：");
          Uart_GetString((char *)uip_appdata);
          uHALr_printf("输入完成！");
          uip_slen =strlen((char *)uip_appdata);
          memcpy(str, (u8_t *)uip_appdata,uip_slen); 
          flag=1; 
         }
         else
         {
          //flag=0;
          memcpy((u8_t *)uip_appdata,str,100);
          uip_slen=100; 
         } 
    }
    if(uip_newdata()) {
      //newdata(); 
//      u8_t  *ptr=(u8_t *)uip_appdata;
//      memcpy(ptr,(u8_t *)uip_appdata,3);
//      uip_slen=3;
        uip_appdata[uip_len]='\0'; 
        uHALr_printf("%s\n", uip_appdata);
    }       
  }
}

void
udp_conf(u16_t *server)
{
       resolv_conn = uip_udp_new(server, 53,2340);
}
/*-----------------------------------------------------------------------------------*/
/**
 * Initalize the resolver.
 */
/*-----------------------------------------------------------------------------------*/