Socket Options

The following socket options are supported for setsockopt and getsockopt. The Type identifies the type of data addressed by optval.

level = SOL_SOCKET

SO_EXPEDITED

This option is negotiated during connection establishment. The setsockopt function must be used before the connection is established to specify the proposed option. The getsockopt function may be used after the circuit has been established to retrieve the final negotiated option. See ISO 8073 for further details.

SO_X25_CONFIRM_DELIVERY

This option controls the state of the Delivery Confirmation bit (D-bit) for X.25 protocols. If the D-bit is set, end-to-end confirmation of data occurs. The SO_X25_CONFIRM_DELIVERY option may be used to change the state of the D-bit many times during the life of a connection.