190 lines
4.9 KiB
Go
190 lines
4.9 KiB
Go
// 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 types020
|
|
|
|
import (
|
|
"encoding/json"
|
|
"fmt"
|
|
"io"
|
|
"net"
|
|
"os"
|
|
|
|
"github.com/containernetworking/cni/pkg/types"
|
|
convert "github.com/containernetworking/cni/pkg/types/internal"
|
|
)
|
|
|
|
const ImplementedSpecVersion string = "0.2.0"
|
|
|
|
var supportedVersions = []string{"", "0.1.0", ImplementedSpecVersion}
|
|
|
|
// Register converters for all versions less than the implemented spec version
|
|
func init() {
|
|
convert.RegisterConverter("0.1.0", []string{ImplementedSpecVersion}, convertFrom010)
|
|
convert.RegisterConverter(ImplementedSpecVersion, []string{"0.1.0"}, convertTo010)
|
|
|
|
// Creator
|
|
convert.RegisterCreator(supportedVersions, NewResult)
|
|
}
|
|
|
|
// Compatibility types for CNI version 0.1.0 and 0.2.0
|
|
|
|
// NewResult creates a new Result object from JSON data. The JSON data
|
|
// must be compatible with the CNI versions implemented by this type.
|
|
func NewResult(data []byte) (types.Result, error) {
|
|
result := &Result{}
|
|
if err := json.Unmarshal(data, result); err != nil {
|
|
return nil, err
|
|
}
|
|
for _, v := range supportedVersions {
|
|
if result.CNIVersion == v {
|
|
if result.CNIVersion == "" {
|
|
result.CNIVersion = "0.1.0"
|
|
}
|
|
return result, nil
|
|
}
|
|
}
|
|
return nil, fmt.Errorf("result type supports %v but unmarshalled CNIVersion is %q",
|
|
supportedVersions, result.CNIVersion)
|
|
}
|
|
|
|
// GetResult converts the given Result object to the ImplementedSpecVersion
|
|
// and returns the concrete type or an error
|
|
func GetResult(r types.Result) (*Result, error) {
|
|
result020, err := convert.Convert(r, ImplementedSpecVersion)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
result, ok := result020.(*Result)
|
|
if !ok {
|
|
return nil, fmt.Errorf("failed to convert result")
|
|
}
|
|
return result, nil
|
|
}
|
|
|
|
func convertFrom010(from types.Result, toVersion string) (types.Result, error) {
|
|
if toVersion != "0.2.0" {
|
|
panic("only converts to version 0.2.0")
|
|
}
|
|
fromResult := from.(*Result)
|
|
return &Result{
|
|
CNIVersion: ImplementedSpecVersion,
|
|
IP4: fromResult.IP4.Copy(),
|
|
IP6: fromResult.IP6.Copy(),
|
|
DNS: *fromResult.DNS.Copy(),
|
|
}, nil
|
|
}
|
|
|
|
func convertTo010(from types.Result, toVersion string) (types.Result, error) {
|
|
if toVersion != "0.1.0" {
|
|
panic("only converts to version 0.1.0")
|
|
}
|
|
fromResult := from.(*Result)
|
|
return &Result{
|
|
CNIVersion: "0.1.0",
|
|
IP4: fromResult.IP4.Copy(),
|
|
IP6: fromResult.IP6.Copy(),
|
|
DNS: *fromResult.DNS.Copy(),
|
|
}, nil
|
|
}
|
|
|
|
// Result is what gets returned from the plugin (via stdout) to the caller
|
|
type Result struct {
|
|
CNIVersion string `json:"cniVersion,omitempty"`
|
|
IP4 *IPConfig `json:"ip4,omitempty"`
|
|
IP6 *IPConfig `json:"ip6,omitempty"`
|
|
DNS types.DNS `json:"dns,omitempty"`
|
|
}
|
|
|
|
func (r *Result) Version() string {
|
|
return r.CNIVersion
|
|
}
|
|
|
|
func (r *Result) GetAsVersion(version string) (types.Result, error) {
|
|
// If the creator of the result did not set the CNIVersion, assume it
|
|
// should be the highest spec version implemented by this Result
|
|
if r.CNIVersion == "" {
|
|
r.CNIVersion = ImplementedSpecVersion
|
|
}
|
|
return convert.Convert(r, version)
|
|
}
|
|
|
|
func (r *Result) Print() error {
|
|
return r.PrintTo(os.Stdout)
|
|
}
|
|
|
|
func (r *Result) PrintTo(writer io.Writer) error {
|
|
data, err := json.MarshalIndent(r, "", " ")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
_, err = writer.Write(data)
|
|
return err
|
|
}
|
|
|
|
// IPConfig contains values necessary to configure an interface
|
|
type IPConfig struct {
|
|
IP net.IPNet
|
|
Gateway net.IP
|
|
Routes []types.Route
|
|
}
|
|
|
|
func (i *IPConfig) Copy() *IPConfig {
|
|
if i == nil {
|
|
return nil
|
|
}
|
|
|
|
var routes []types.Route
|
|
for _, fromRoute := range i.Routes {
|
|
routes = append(routes, *fromRoute.Copy())
|
|
}
|
|
return &IPConfig{
|
|
IP: i.IP,
|
|
Gateway: i.Gateway,
|
|
Routes: routes,
|
|
}
|
|
}
|
|
|
|
// net.IPNet is not JSON (un)marshallable so this duality is needed
|
|
// for our custom IPNet type
|
|
|
|
// JSON (un)marshallable types
|
|
type ipConfig struct {
|
|
IP types.IPNet `json:"ip"`
|
|
Gateway net.IP `json:"gateway,omitempty"`
|
|
Routes []types.Route `json:"routes,omitempty"`
|
|
}
|
|
|
|
func (c *IPConfig) MarshalJSON() ([]byte, error) {
|
|
ipc := ipConfig{
|
|
IP: types.IPNet(c.IP),
|
|
Gateway: c.Gateway,
|
|
Routes: c.Routes,
|
|
}
|
|
|
|
return json.Marshal(ipc)
|
|
}
|
|
|
|
func (c *IPConfig) UnmarshalJSON(data []byte) error {
|
|
ipc := ipConfig{}
|
|
if err := json.Unmarshal(data, &ipc); err != nil {
|
|
return err
|
|
}
|
|
|
|
c.IP = net.IPNet(ipc.IP)
|
|
c.Gateway = ipc.Gateway
|
|
c.Routes = ipc.Routes
|
|
return nil
|
|
}
|