Windows Sockets 2 Interface Elements for Multipoint and Multicast
The mechanisms that have been incorporated into Windows Sockets 2 for utilizing multipoint capabilities can be summarized as follows:
- Three attribute bits in the WSAPROTOCOL_INFO structure.
- Four flags defined for the dwFlags parameter of WSASocket.
- One function, WSAJoinLeaf, for adding leaf nodes into a multipoint session.
- Two WSAIoctl command codes for controlling multipoint loopback and the scope of multicast transmissions.
The following sections describe these interface elements in more detail: