SilcPacketStream silc_packet_stream_create(SilcPacketEngine engine,
                                               SilcSchedule schedule,
                                               SilcStream stream);

    Create new packet stream and use the `stream' as underlaying stream.
    Usually the `stream' would be a socket stream, but it can be any
    stream.  After this function returns, packets can immediately be
    sent to and received from the stream.

    The `stream' will be owned by the packet stream and will be closed
    and destroyed when the packet stream is destroyed.  If the packet
    stream creation fails the `stream' is left intact.

    SilcPacketStream cannot be used with silc_stream_* routines (such as
    silc_stream_read and silc_stream_write) because of its special nature.
    Use the silc_packet_send and the silc_packet_send_ext to send packets.
    To read packets you will receive the packet receive callback from
    packet engine.  Destroy the stream with silc_packet_stream_destroy.

    The SilcPacketStream is thread safe.  Same context can be safely used
    in multi threaded environment.