Accepts a connect request. A transport user can accept a connection on either the same local transport end point or on an end point different from the one on which the connect indication arrived.
Parameters fd Identifies the local transport end point where the connect indication arrived.
The values of parameters specified by the opt field and the syntax of those values are protocol-specific. If the value in the len field of the udata field is 0, no data will be sent to the caller. The user does not have permission to accept a connection on the responding transport end point or use the specified options. The amount of user data specified was not within the bounds allowed by the transport provider. The specified protocol address was in an incorrect format or contained illegal information.