84 lines
2.6 KiB
Go
84 lines
2.6 KiB
Go
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// Copyright 2016 CNI authors
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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 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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package version
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import (
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"encoding/json"
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"fmt"
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"github.com/containernetworking/cni/pkg/types"
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"github.com/containernetworking/cni/pkg/types/020"
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"github.com/containernetworking/cni/pkg/types/current"
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)
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// Current reports the version of the CNI spec implemented by this library
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func Current() string {
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return "0.4.0"
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}
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// Legacy PluginInfo describes a plugin that is backwards compatible with the
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// CNI spec version 0.1.0. In particular, a runtime compiled against the 0.1.0
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// library ought to work correctly with a plugin that reports support for
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// Legacy versions.
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//
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// Any future CNI spec versions which meet this definition should be added to
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// this list.
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var Legacy = PluginSupports("0.1.0", "0.2.0")
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var All = PluginSupports("0.1.0", "0.2.0", "0.3.0", "0.3.1", "0.4.0")
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var resultFactories = []struct {
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supportedVersions []string
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newResult types.ResultFactoryFunc
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}{
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{current.SupportedVersions, current.NewResult},
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{types020.SupportedVersions, types020.NewResult},
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}
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// Finds a Result object matching the requested version (if any) and asks
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// that object to parse the plugin result, returning an error if parsing failed.
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func NewResult(version string, resultBytes []byte) (types.Result, error) {
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reconciler := &Reconciler{}
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for _, resultFactory := range resultFactories {
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err := reconciler.CheckRaw(version, resultFactory.supportedVersions)
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if err == nil {
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// Result supports this version
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return resultFactory.newResult(resultBytes)
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}
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}
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return nil, fmt.Errorf("unsupported CNI result version %q", version)
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}
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// ParsePrevResult parses a prevResult in a NetConf structure and sets
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// the NetConf's PrevResult member to the parsed Result object.
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func ParsePrevResult(conf *types.NetConf) error {
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if conf.RawPrevResult == nil {
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return nil
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}
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resultBytes, err := json.Marshal(conf.RawPrevResult)
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if err != nil {
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return fmt.Errorf("could not serialize prevResult: %v", err)
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}
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conf.RawPrevResult = nil
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conf.PrevResult, err = NewResult(conf.CNIVersion, resultBytes)
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if err != nil {
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return fmt.Errorf("could not parse prevResult: %v", err)
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}
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return nil
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}
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