90 lines
2.8 KiB
Go
90 lines
2.8 KiB
Go
// 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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types100 "github.com/containernetworking/cni/pkg/types/100"
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"github.com/containernetworking/cni/pkg/types/create"
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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 types100.ImplementedSpecVersion
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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", "1.0.0")
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// VersionsFrom returns a list of versions starting from min, inclusive
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func VersionsStartingFrom(min string) PluginInfo {
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out := []string{}
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// cheat, just assume ordered
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ok := false
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for _, v := range All.SupportedVersions() {
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if !ok && v == min {
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ok = true
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}
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if ok {
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out = append(out, v)
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}
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}
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return PluginSupports(out...)
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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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return create.Create(version, resultBytes)
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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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// Prior to 1.0.0, Result types may not marshal a CNIVersion. Since the
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// result version must match the config version, if the Result's version
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// is empty, inject the config version.
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if ver, ok := conf.RawPrevResult["CNIVersion"]; !ok || ver == "" {
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conf.RawPrevResult["CNIVersion"] = conf.CNIVersion
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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: %w", err)
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}
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conf.RawPrevResult = nil
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conf.PrevResult, err = create.Create(conf.CNIVersion, resultBytes)
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if err != nil {
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return fmt.Errorf("could not parse prevResult: %w", err)
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}
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return nil
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}
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