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.

   Additional Inherited Members

Detailed Description

       Internet addresses used specifically as masking addresses (such as ' 255.255.255.0') are
       held in the IPV4Mask derived object.

       The separate 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()

       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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