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Introduce link monitor for ARP/NDP responders
For secondary-network scenarios, the transport interface can be changed after the agent is started. The ARP/NDP responders should be started after the initialization of secondary-network to bind to the transport interface of the new index. Besides, this change also addresses the following issues: - NDP responder may fail to bind to the new interface due to the Duplicate Address Detection process. - Golang caches the zone index for the interface, which may result in NDP responder binding on the stale interface Fixes: #6623 Signed-off-by: Xu Liu <xu.liu@broadcom.com>
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| // Copyright 2024 Antrea Authors | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| package linkmonitor | ||
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| type LinkEventHandler func(linkName string) | ||
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| type Interface interface { | ||
| LinkExists(linkName string) bool | ||
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| // Run starts the detector. | ||
| Run(stopCh <-chan struct{}) | ||
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| // AddEventHandler registers an eventHandler of link updates. It's not thread-safe and should be called before | ||
| // starting the detector. If no link name is provided, the handler will be called for all link updates. | ||
| AddEventHandler(handler LinkEventHandler, linkNames ...string) | ||
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| // HasSynced returns true if the cache has been initialized with the existing links. | ||
| HasSynced() bool | ||
| } |
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