twisted.pair.testing.Tunnel

Method	__init__
Method	blocking	If the file descriptor for this tunnel is open in blocking mode, `True`. `False` otherwise.
Method	closeOnExec	If the file descriptor for this tunnel is marked as close-on-exec, `True`. `False` otherwise.
Method	addToReadBuffer	Deliver a datagram to this tunnel's read buffer. This makes it available to be read later using the `read` method.
Method	read	Read a datagram out of this tunnel.
Method	write	Write a datagram into this tunnel.
Class Variable	_DEVICE_NAME	A string representing the conventional filesystem entry for the tunnel factory character special device. (type: `bytes`)

_DEVICE_NAME =

A string representing the conventional filesystem entry for the tunnel factory character special device. (type: bytes)

def __init__(self, system, openFlags, fileMode):

Parameters	system	An `_IInputOutputSystem` provider to use to perform I/O.
	openFlags	Any flags to apply when opening the tunnel device. See `os.O_*`. (type: `int`)
	fileMode	ignored

@property
def blocking(self):

If the file descriptor for this tunnel is open in blocking mode, True. False otherwise.

@property
def closeOnExec(self):

If the file descriptor for this tunnel is marked as close-on-exec, True. False otherwise.

def addToReadBuffer(self, datagram):

Deliver a datagram to this tunnel's read buffer. This makes it available to be read later using the read method.

Parameters datagram The IPv4 datagram to deliver. If the mode of this tunnel is TAP then ethernet framing will be added automatically. (type: bytes)

def read(self, limit):

Read a datagram out of this tunnel.

Parameters	limit	The maximum number of bytes from the datagram to return. If the next datagram is larger than this, extra bytes are dropped and lost forever. (type: `int`)
Returns	The datagram which was read from the tunnel. If the tunnel mode does not include `TunnelFlags.IFF_NO_PI` then the datagram is prefixed with a 4 byte PI header. (type: `bytes`)
Raises	OSError	Any of the usual I/O problems can result in this exception being raised with some particular error number set.
	IOError	Any of the usual I/O problems can result in this exception being raised with some particular error number set.

def write(self, datagram):

Write a datagram into this tunnel.

Parameters	datagram	The datagram to write. (type: `bytes`)
Returns	The number of bytes of the datagram which were written. (type: `int`)
Raises	IOError	Any of the usual I/O problems can result in this exception being raised with some particular error number set.

twisted.pair.testing.Tunnel(object) class documentation

`twisted.pair.testing.Tunnel(object)` class documentation