System Data Structures for Sockets

• In order to use a socket, the kernel needs to keep track of several pieces of data

• Protocol Family: a parameter to the socket call

• Service Type (Stream, Datagram): parameter to socket

• Local IP Address: can be set with bind

• Local Port: can be set with bind

• Remote IP Address: can be set with connect

• Remote Port: can be set with connect

• Ultimately all 6 values must be known to communicate