bool silc_client_send_packet(SilcClient client,
                                  SilcClientConnection conn,
                                  SilcPacketType type,
                                  const unsigned char *data,
                                  SilcUInt32 data_len);

    This routine can be used by application to send packets directly
    to a connection indicated by `conn'.  Usually application does not
    need this routine since the Client Library handles the packet
    sending.  The `type' indicates the packet type.  If `data' is
    NULL then empty packet is sent.  This returns FALSE if packet cannot
    be sent.