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