Not valid on a client stream. On a listening stream, check whether there is a pending client connection.

Not valid on a listening stream. On a client stream, check whether the connection has completed.

Not valid on a listening stream. On a client stream, check whether it is possible to flush any more data without blocking.

On a listening stream, check for connections pending from clients. On a client stream, check whether there is any data available to receive.

Not valid on a listening stream. On a client stream, check whether there is space in the stream buffer to store any data.nections pending from clients. On a client stream, check whether there is any data available to receive.