inet_aton.c

TCPDUMP的C语言源代码,是在数据链路层的应用

/*
 * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska H鰃skolan
 * (Royal Institute of Technology, Stockholm, Sweden).
 * 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
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 *
 * 2. Redistributions in binary form must reproduce the above copyright
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 *
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the Kungliga Tekniska
 *      H鰃skolan and its contributors.
 *
 * 4. 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
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/* $Id: inet_aton.c,v 1.6 2003-11-16 09:36:49 guy Exp $ */

#ifndef lint
static const char rcsid[] _U_ =
     "@(#) $Header: /tcpdump/master/tcpdump/missing/inet_aton.c,v 1.6 2003-11-16 09:36:49 guy Exp $";
#endif

#include <tcpdump-stdinc.h>

/* Minimal implementation of inet_aton.
 * Cannot distinguish between failure and a local broadcast address. */

#ifndef INADDR_NONE
#define INADDR_NONE 0xffffffff
#endif

int
inet_aton(const char *cp, struct in_addr *addr)
{
  addr->s_addr = inet_addr(cp);
  return (addr->s_addr == INADDR_NONE) ? 0 : 1;
}