Receiver Reservation Semantics

The process of joining RSVP sessions includes making appropriate function calls particular to the type of RSVP session an application wants to join. Due to their inherent differences, and the difference in the way each handles sockets, unicast (both TCP and UDP) and multicast sessions are best discussed individually. To generalize, the following are usually true:

• Unicast sessions usually include use of the WSAConnect function.
• Multicast sessions generally use the WSAJoinLeaf function (and sendto for multicast senders).
• Both unicast and multicast can use the WSAIoctl(SIO_SET_QOS) function/opcode pair.

Each of these common methods for joining RSVP sessions is discussed individually.