def check_channel_direct_tcpip_request(self, chanid, origin, destination):
return OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED<EOL>
Determine if a local port forwarding channel will be granted, and
return C{OPEN_SUCCEEDED} or an error code.  This method is
called in server mode when the client requests a channel, after
authentication is complete.

The C{chanid} parameter is a small number that uniquely identifies the
channel within a L{Transport}.  A L{Channel} object is not created
unless this method returns C{OPEN_SUCCEEDED} -- once a
L{Channel} object is created, you can call L{Channel.get_id} to
retrieve the channel ID.

The origin and destination parameters are (ip_address, port) tuples
that correspond to both ends of the TCP connection in the forwarding
tunnel.

The return value should either be C{OPEN_SUCCEEDED} (or
C{0}) to allow the channel request, or one of the following error
codes to reject it:
    - C{OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED}
    - C{OPEN_FAILED_CONNECT_FAILED}
    - C{OPEN_FAILED_UNKNOWN_CHANNEL_TYPE}
    - C{OPEN_FAILED_RESOURCE_SHORTAGE}

The default implementation always returns
C{OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED}.

@param chanid: ID of the channel
@type chanid: int
@param origin: 2-tuple containing the IP address and port of the
    originator (client side)
@type origin: tuple
@param destination: 2-tuple containing the IP address and port of the
    destination (server side)
@type destination: tuple
@return: a success or failure code (listed above)
@rtype: int