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datapath.go
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datapath.go
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// Copyright 2019 Authors of Cilium
//
// 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.
package datapath
import (
"io"
)
// Datapath is the interface to abstract all datapath interactions. The
// abstraction allows to implement the datapath requirements with multiple
// implementations
type Datapath interface {
// Node must return the handler for node events
Node() NodeHandler
// LocalNodeAddressing must return the node addressing implementation
// of the local node
LocalNodeAddressing() NodeAddressing
// WriteNodeConfig writes the implementation-specific configuration of
// node-wide options into the specified writer.
WriteNodeConfig(io.Writer, *LocalNodeConfiguration) error
// WriteNetdevConfig writes the implementation-specific configuration
// of configurable options to the specified writer. Options specified
// here will apply to base programs and not to endpoints, though
// endpoints may have equivalent configurable options.
WriteNetdevConfig(io.Writer, DeviceConfiguration) error
// WriteTemplateConfig writes the implementation-specific configuration
// of configurable options for BPF templates to the specified writer.
WriteTemplateConfig(w io.Writer, cfg EndpointConfiguration) error
// WriteEndpointConfig writes the implementation-specific configuration
// of configurable options for the endpoint to the specified writer.
WriteEndpointConfig(w io.Writer, cfg EndpointConfiguration) error
// InstallProxyRules creates the necessary datapath config (e.g., iptables
// rules for redirecting host proxy traffic on a specific ProxyPort)
InstallProxyRules(proxyPort uint16, ingress bool, name string) error
// RemoveProxyRules creates the necessary datapath config (e.g., iptables
// rules for redirecting host proxy traffic on a specific ProxyPort)
RemoveProxyRules(proxyPort uint16, ingress bool, name string) error
// SupportsOriginalSourceAddr tells if the datapath supports
// use of original source addresses in proxy upstream
// connections.
SupportsOriginalSourceAddr() bool
}