69 lines
1.6 KiB
Python
69 lines
1.6 KiB
Python
|
# coding: utf-8
|
||
|
|
"""zmq device functions"""
|
||
|
|
|
||
|
|
# Copyright (C) PyZMQ Developers
|
||
|
|
# Distributed under the terms of the Modified BSD License.
|
||
|
|
|
||
|
|
from ._cffi import C, ffi
|
||
|
|
from .socket import Socket
|
||
|
|
from .utils import _retry_sys_call
|
||
|
|
|
||
|
|
|
||
|
|
def device(device_type, frontend, backend):
|
||
|
|
return proxy(frontend, backend)
|
||
|
|
|
||
|
|
|
||
|
|
def proxy(frontend, backend, capture=None):
|
||
|
|
if isinstance(capture, Socket):
|
||
|
|
capture = capture._zmq_socket
|
||
|
|
else:
|
||
|
|
capture = ffi.NULL
|
||
|
|
|
||
|
|
_retry_sys_call(
|
||
|
|
C.zmq_proxy,
|
||
|
|
frontend._zmq_socket,
|
||
|
|
backend._zmq_socket,
|
||
|
|
capture
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
def proxy_steerable(frontend, backend, capture=None, control=None):
|
||
|
|
"""proxy_steerable(frontend, backend, capture, control)
|
||
|
|
|
||
|
|
Start a zeromq proxy with control flow.
|
||
|
|
|
||
|
|
.. versionadded:: libzmq-4.1
|
||
|
|
.. versionadded:: 18.0
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
frontend : Socket
|
||
|
|
The Socket instance for the incoming traffic.
|
||
|
|
backend : Socket
|
||
|
|
The Socket instance for the outbound traffic.
|
||
|
|
capture : Socket (optional)
|
||
|
|
The Socket instance for capturing traffic.
|
||
|
|
control : Socket (optional)
|
||
|
|
The Socket instance for control flow.
|
||
|
|
"""
|
||
|
|
if isinstance(capture, Socket):
|
||
|
|
capture = capture._zmq_socket
|
||
|
|
else:
|
||
|
|
capture = ffi.NULL
|
||
|
|
|
||
|
|
if isinstance(control, Socket):
|
||
|
|
control = control._zmq_socket
|
||
|
|
else:
|
||
|
|
control = ffi.NULL
|
||
|
|
|
||
|
|
_retry_sys_call(
|
||
|
|
C.zmq_proxy_steerable,
|
||
|
|
frontend._zmq_socket,
|
||
|
|
backend._zmq_socket,
|
||
|
|
capture,
|
||
|
|
control
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
__all__ = ['device', 'proxy', 'proxy_steerable']
|