ip6_addr.c

《嵌入式网络系统设计-基于Atmel ARM7 系列》这个本书的光盘资料

/*
 * Copyright (c) 2001-2004 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 <[e-mail]>
 *
 */

#include "lwip/ip_addr.h"
#include "lwip/inet.h"


u8_t
ip_addr_netcmp(struct ip_addr *addr1, struct ip_addr *addr2,
                struct ip_addr *mask)
{
  return((addr1->addr[0] & mask->addr[0]) == (addr2->addr[0] & mask->addr[0]) &&
         (addr1->addr[1] & mask->addr[1]) == (addr2->addr[1] & mask->addr[1]) &&
         (addr1->addr[2] & mask->addr[2]) == (addr2->addr[2] & mask->addr[2]) &&
         (addr1->addr[3] & mask->addr[3]) == (addr2->addr[3] & mask->addr[3]));
        
}

u8_t
ip_addr_cmp(struct ip_addr *addr1, struct ip_addr *addr2)
{
  return(addr1->addr[0] == addr2->addr[0] &&
         addr1->addr[1] == addr2->addr[1] &&
         addr1->addr[2] == addr2->addr[2] &&
         addr1->addr[3] == addr2->addr[3]);
}

void
ip_addr_set(struct ip_addr *dest, struct ip_addr *src)
{
  memcpy(dest, src, sizeof(struct ip_addr));
  /*  dest->addr[0] = src->addr[0];
  dest->addr[1] = src->addr[1];
  dest->addr[2] = src->addr[2];
  dest->addr[3] = src->addr[3];*/
}

u8_t
ip_addr_isany(struct ip_addr *addr)
{
  if (addr == NULL) return 1;
  return((addr->addr[0] | addr->addr[1] | addr->addr[2] | addr->addr[3]) == 0);
}


/*#if IP_DEBUG*/
void
ip_addr_debug_print(struct ip_addr *addr)
{
  printf("%"X32_F":%"X32_F":%"X32_F":%"X32_F":%"X32_F":%"X32_F":%"X32_F":%"X32_F",
         ntohl(addr->addr[0]) >> 16 & 0xffff,
         ntohl(addr->addr[0]) & 0xffff,
         ntohl(addr->addr[1]) >> 16 & 0xffff,
         ntohl(addr->addr[1]) & 0xffff,
         ntohl(addr->addr[2]) >> 16 & 0xffff,
         ntohl(addr->addr[2]) & 0xffff,
         ntohl(addr->addr[3]) >> 16 & 0xffff,
         ntohl(addr->addr[3]) & 0xffff);
}
/*#endif*/ /* IP_DEBUG */