NETIO_DGRAM_InterfaceMultiCastGroup Struct Reference

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#include <netio_dgram.h>

Data Fields
struct NETIO_Address	address_low
	The lowest multicast address.
struct NETIO_Address	address_high
	The highest multicast address.
struct NETIO_Netmask	netmask
	The netmask to apply to the group.

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Detailed Description

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Field Documentation

struct NETIO_Address NETIO_DGRAM_InterfaceMultiCastGroup::address_low

The lowest multicast address.

struct NETIO_Address NETIO_DGRAM_InterfaceMultiCastGroup::address_high

The highest multicast address.

struct NETIO_Netmask NETIO_DGRAM_InterfaceMultiCastGroup::netmask

The netmask to apply to the group.

The netmask is a sequence of N consecutive 1s, starting with the left most bit. In order to determine if an address is a multicast address the netmask is first applied to the address and the high and low address of the multicast group. If the masked address is within the multicast group it is treated as a multicast address.