9f1f1726d0
After forking from Ryu, the namespace needs to change from 'ryu' to 'os_ken' so that it won't collide with the namespace of the old library. Change-Id: I807a8785e525cc02825d15a1a01eec3d5d20cce4
75 lines
2.3 KiB
Python
75 lines
2.3 KiB
Python
# Copyright (C) 2017 Nippon Telegraph and Telephone Corporation.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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OpenFlow related APIs of os_ken.controller module.
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"""
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import netaddr
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from os_ken.base import app_manager
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from os_ken.lib import hub
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from os_ken.lib import ip
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from . import ofp_event
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_TMP_ADDRESSES = {}
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def register_switch_address(addr, interval=None):
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"""
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Registers a new address to initiate connection to switch.
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Registers a new IP address and port pair of switch to let
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os_ken.controller.controller.OpenFlowController to try to initiate
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connection to switch.
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:param addr: A tuple of (host, port) pair of switch.
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:param interval: Interval in seconds to try to connect to switch
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"""
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assert len(addr) == 2
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assert ip.valid_ipv4(addr[0]) or ip.valid_ipv6(addr[0])
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ofp_handler = app_manager.lookup_service_brick(ofp_event.NAME)
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_TMP_ADDRESSES[addr] = interval
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def _retry_loop():
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# Delays registration if ofp_handler is not started yet
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while True:
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if ofp_handler.controller is not None:
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for a, i in _TMP_ADDRESSES.items():
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ofp_handler.controller.spawn_client_loop(a, i)
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hub.sleep(1)
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break
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hub.sleep(1)
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hub.spawn(_retry_loop)
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def unregister_switch_address(addr):
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"""
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Unregister the given switch address.
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Unregisters the given switch address to let
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os_ken.controller.controller.OpenFlowController stop trying to initiate
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connection to switch.
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:param addr: A tuple of (host, port) pair of switch.
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"""
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ofp_handler = app_manager.lookup_service_brick(ofp_event.NAME)
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# Do nothing if ofp_handler is not started yet
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if ofp_handler.controller is None:
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return
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ofp_handler.controller.stop_client_loop(addr)
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