127 lines
3.0 KiB
Go
127 lines
3.0 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 types020
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import (
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"encoding/json"
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"fmt"
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"io"
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"net"
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"os"
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"github.com/containernetworking/cni/pkg/types"
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)
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const ImplementedSpecVersion string = "0.2.0"
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var SupportedVersions = []string{"", "0.1.0", ImplementedSpecVersion}
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// Compatibility types for CNI version 0.1.0 and 0.2.0
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func NewResult(data []byte) (types.Result, error) {
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result := &Result{}
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if err := json.Unmarshal(data, result); err != nil {
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return nil, err
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}
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return result, nil
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}
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func GetResult(r types.Result) (*Result, error) {
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// We expect version 0.1.0/0.2.0 results
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result020, err := r.GetAsVersion(ImplementedSpecVersion)
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if err != nil {
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return nil, err
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}
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result, ok := result020.(*Result)
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if !ok {
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return nil, fmt.Errorf("failed to convert result")
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}
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return result, nil
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}
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// Result is what gets returned from the plugin (via stdout) to the caller
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type Result struct {
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CNIVersion string `json:"cniVersion,omitempty"`
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IP4 *IPConfig `json:"ip4,omitempty"`
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IP6 *IPConfig `json:"ip6,omitempty"`
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DNS types.DNS `json:"dns,omitempty"`
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}
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func (r *Result) Version() string {
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return ImplementedSpecVersion
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}
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func (r *Result) GetAsVersion(version string) (types.Result, error) {
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for _, supportedVersion := range SupportedVersions {
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if version == supportedVersion {
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r.CNIVersion = version
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return r, nil
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}
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}
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return nil, fmt.Errorf("cannot convert version %q to %s", SupportedVersions, version)
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}
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func (r *Result) Print() error {
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return r.PrintTo(os.Stdout)
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}
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func (r *Result) PrintTo(writer io.Writer) error {
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data, err := json.MarshalIndent(r, "", " ")
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if err != nil {
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return err
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}
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_, err = writer.Write(data)
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return err
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}
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// IPConfig contains values necessary to configure an interface
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type IPConfig struct {
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IP net.IPNet
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Gateway net.IP
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Routes []types.Route
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}
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// net.IPNet is not JSON (un)marshallable so this duality is needed
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// for our custom IPNet type
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// JSON (un)marshallable types
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type ipConfig struct {
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IP types.IPNet `json:"ip"`
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Gateway net.IP `json:"gateway,omitempty"`
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Routes []types.Route `json:"routes,omitempty"`
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}
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func (c *IPConfig) MarshalJSON() ([]byte, error) {
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ipc := ipConfig{
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IP: types.IPNet(c.IP),
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Gateway: c.Gateway,
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Routes: c.Routes,
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}
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return json.Marshal(ipc)
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}
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func (c *IPConfig) UnmarshalJSON(data []byte) error {
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ipc := ipConfig{}
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if err := json.Unmarshal(data, &ipc); err != nil {
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return err
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}
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c.IP = net.IPNet(ipc.IP)
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c.Gateway = ipc.Gateway
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c.Routes = ipc.Routes
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return nil
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}
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