NAME
ost::IPV4Mask -
Internet addresses used specifically as masking addresses (such as ’
255.255.255.0’) are held in the IPV4Mask derived object.
SYNOPSIS
#include <address.h>
Inherits ost::IPV4Address.
Public Member Functions
IPV4Mask (const char *mask)
Create the mask from a null terminated ASCII string such as
255.255.255.128.
IPV4Address & operator= (unsigned long addr)
Allows assignment from the return of functions like inet_addr() or
htonl().
Friends
__EXPORT IPV4Host operator& (const IPV4Host &addr, const IPV4Mask
&mask)
Masks are usually used to coerce host addresses into a specific
router or class domain.
Detailed Description
Internet addresses used specifically as masking addresses (such as ’
255.255.255.0’) are held in the IPV4Mask derived object.
The seperate class is used so that C++ type casting can automatically
determine when an IPV4Address object is really a mask address object
rather than simply using the base class. This also allows manipulative
operators for address masking to operate only when presented with a
Masked address as well as providing cleaner and safer source.
Author:
David Sugar <dyfet@ostel.com> Internet Address Mask such as subnet
masks.
Constructor & Destructor Documentation
ost::IPV4Mask::IPV4Mask (const char * mask)
Create the mask from a null terminated ASCII string such as
’255.255.255.128’. Parameters:
mask null terminated ASCII mask string.
Member Function Documentation
IPV4Address& ost::IPV4Mask::operator= (unsigned long addr) [inline]
Allows assignment from the return of functions like inet_addr() or
htonl().
Reimplemented from ost::IPV4Address.
References ost::IPV4Address::operator=().
Friends And Related Function Documentation
__EXPORT IPV4Host operator& (const IPV4Host & addr, const IPV4Mask & mask)
[friend]
Masks are usually used to coerce host addresses into a specific router
or class domain. This can be done by taking the Inet Host Address
object and ’and’ing it with an address mask. This operation can be
directly expressed in C++ through the & operator.
Returns:
a internet host address that has been masked.
Parameters:
addr host address to be masked by subnet.
mask inetnet mask address object to mask by.
Author
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