class InetMaskAddress

Internet Address Mask such as subnet masks. More...

Definition#include <socket.h>
InheritsInetAddress
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Detailed Description

Internet addresses used specifically as masking addresses (such as " 255.255.255.0") are held in the InetMaskAddress derived object. 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.

InetMaskAddress (const char *mask)

Create the mask from a null terminated ASCII string such as "255.255.255.128".

Parameters:
masknull terminated ASCII mask string.

friend InetHostAddress operator& (const InetHostAddress &addr, const InetMaskAddress &mask)

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.

Parameters:
addrhost address to be masked by subnet.
maskinetnet mask address object to mask by.

Returns: a internet host address that has been masked.