lwip/src/core/ipv4/ip_addr.c

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2002-10-19 12:59:30 +00:00
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
2002-10-19 12:59:30 +00:00
* 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/ip_addr.h"
#include "lwip/inet.h"
/* used by IP_ADDR_ANY and IP_ADDR_BROADCAST in ip_addr.h */
const struct ip_addr ip_addr_any = { 0x00000000UL };
const struct ip_addr ip_addr_broadcast = { 0xffffffffUL };
/* work in progress - meant to replace ip_addr.h macro
* as it does not support non-broadcast interfaces.
* lwip-devel 18-2-2004
*/
#if 0
#include "lwip/netif.h"
bool ip_addr_isbroadcast(ip_addr *addr1, struct netif *netif)
bool ip_addr_isbroadcast(addr1, netif)
{
/* all ones (broadcast) or all zeroes (old skool broadcast) */
if (addr1->addr == ip_addr_broadcast.ip_addr) ||
addr1->addr == ip_addr_any.ip_addr))
return 1;
/* no broadcast support on this network interface
* we cannot proceed matching against broadcast addresses */
else if (netif->flags &= NETIF_FLAG_BROADCAST == 0)
return 0;
/* address matches network interface address exactly? */
else if (netif->ip_addr.addr == addr1->addr)
return 0;
/* host identifier bits are all ones? => broadcast address */
else if (~netif->netmask.addr & addr1->addr ==
~netif->netmask.addr & ip_addr_broadcast.ip_addr)
return 1;
else
return 0;
}
#endif