cidr.cpp revision 96d9a0dc3c06563f7d0afa393e5d47d7290088be
/* $Id$ */
/** @file
* IPRT - IPv4 address parsing.
*/
/*
* Copyright (C) 2006-2008 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
{
const char *psz = pszAddress;
const char *pszNetmask;
char *pszNext;
int rc = VINF_SUCCESS;
int cDelimiter = 0;
int cDelimiterLimit = 0;
if (!pszNetmask)
cBits = 32;
else
{
if ( RT_FAILURE(rc)
|| cBits > 32
return VERR_INVALID_PARAMETER;
}
if (cBits <= 8)
cDelimiterLimit = 0;
else if (cBits <= 16)
cDelimiterLimit = 1;
else if (cBits <= 24)
cDelimiterLimit = 2;
else if (cBits <= 32)
cDelimiterLimit = 3;
for (;;)
{
if ( RT_FAILURE(rc)
|| rc == VWRN_NUMBER_TOO_BIG)
return VERR_INVALID_PARAMETER;
if (*pszNext == '.')
cDelimiter++;
else if ( cDelimiter >= cDelimiterLimit
&& ( *pszNext == '\0'
|| *pszNext == '/'))
break;
else
return VERR_INVALID_PARAMETER;
if (cDelimiter > 3)
/* not more than four octets */
return VERR_INVALID_PARAMETER;
}
/* Corner case: see RFC 790 page 2 and RFC 4632 page 6. */
if ( addr[0] == 0
|| u32Netmask == (uint32_t)~0))
return VERR_INVALID_PARAMETER;
if ((u32Network & ~u32Netmask) != 0)
return VERR_INVALID_PARAMETER;
*pNetmask = u32Netmask;
*pNetwork = u32Network;
return VINF_SUCCESS;
}