Network Interface Guide


With tirdwr on a stream, you can send and receive data over a transport connection for the duration of the connection. Either user can terminate the connection by closing the file descriptor associated with the transport endpoint or by popping the tirdwr module off the stream. In either case, tirdwr does the following:

A process cannot initiate an orderly release after tirdwr is pushed onto a stream. tirdwr handles an orderly release if it is initiated by the user on the other side of a transport connection. If the client in this section is communicating with the server program in "Connection Mode Service", the server terminates the transfer of data with an orderly release request. The server then waits for the corresponding request from the client. At that point, the client exits and the transport endpoint is closed. When the file descriptor is closed, tirdwr initiates the orderly release request from the client's side of the connection. This generates the request that the server is blocked on.

Some protocols, like TCP, require this orderly release to ensure that the data is delivered intact.