Sun Cluster Data Services Developer's Guide for Solaris OS

How the Server Identifies a Client

Each client is uniquely identified by its callback address, that is, its IP address and port number. The port is specified in the SC_CALLBACK_REG messages, and the IP address is obtained from the TCP registration connection. The CRNP assumes that subsequent SC_CALLBACK_REG messages with the same callback address come from the same client, even if the source port from which the messages are sent is different.