InetMaskAddress(3cc)

NAME

InetMaskAddress - Internet addresses used specifically as masking addresses (such as ' 255.255.255.0') are held in the InetMaskAddress derived object. Internet Address Mask such as subnet masks.

SYNOPSIS

#include <socket.h>

Inherits InetAddress.

Public Methods

InetMaskAddress (const char *mask)
Create the mask from a null terminated ASCII string such as '255.255.255.128'. InetAddress & operator= (unsigned long addr)
Allows assignment from the return of functions like inet_addr() or htonl().

Friends

InetHostAddress operator & (const InetHostAddress &addr, const InetMaskAddress &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 InetMaskAddress derived object. Internet Address Mask such as subnet masks.

The seperate class is used so that C++ type casting can automatically determine when an InetAddress 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 <[email protected]>

CONSTRUCTOR & DESTRUCTOR DOCUMENTATION

InetMaskAddress::InetMaskAddress (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

InetAddress& InetMaskAddress::operator= (unsigned long addr) `[inline]`

Allows assignment from the return of functions like inet_addr() or htonl().

Reimplemented from InetAddress.

FRIENDS AND RELATED FUNCTION DOCUMENTATION

InetHostAddress operator & (const InetHostAddress & addr, const InetMaskAddress & 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.