Upgrade containerd to 1.6.2 and CNI to 0.9.1

Upgrades containerd, and switches to the official 64-bit ARM
binary.

Continues to use my binary for 32-bit arm hosts.

CNI upgraded to v0.9.1

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

vendor/github.com/containernetworking/cni/libcni/api.go

@@ -14,6 +14,12 @@
 
 package libcni
 
+// Note this is the actual implementation of the CNI specification, which
+// is reflected in the https://github.com/containernetworking/cni/blob/master/SPEC.md file
+// it is typically bundled into runtime providers (i.e. containerd or cri-o would use this
+// before calling runc or hcsshim).  It is also bundled into CNI providers as well, for example,
+// to add an IP to a container, to parse the configuration of the CNI and so on.
+
 import (
 	"context"
 	"encoding/json"
@@ -25,6 +31,7 @@ import (
 
 	"github.com/containernetworking/cni/pkg/invoke"
 	"github.com/containernetworking/cni/pkg/types"
+	"github.com/containernetworking/cni/pkg/types/create"
 	"github.com/containernetworking/cni/pkg/utils"
 	"github.com/containernetworking/cni/pkg/version"
 )
@@ -278,7 +285,7 @@ func (c *CNIConfig) getCachedConfig(netName string, rt *RuntimeConf) ([]byte, *R
 
 	unmarshaled := cachedInfo{}
 	if err := json.Unmarshal(bytes, &unmarshaled); err != nil {
-		return nil, nil, fmt.Errorf("failed to unmarshal cached network %q config: %v", netName, err)
+		return nil, nil, fmt.Errorf("failed to unmarshal cached network %q config: %w", netName, err)
 	}
 	if unmarshaled.Kind != CNICacheV1 {
 		return nil, nil, fmt.Errorf("read cached network %q config has wrong kind: %v", netName, unmarshaled.Kind)
@@ -304,15 +311,8 @@ func (c *CNIConfig) getLegacyCachedResult(netName, cniVersion string, rt *Runtim
 		return nil, nil
 	}
 
-	// Read the version of the cached result
-	decoder := version.ConfigDecoder{}
-	resultCniVersion, err := decoder.Decode(data)
-	if err != nil {
-		return nil, err
-	}
-
-	// Ensure we can understand the result
-	result, err := version.NewResult(resultCniVersion, data)
+	// Load the cached result
+	result, err := create.CreateFromBytes(data)
 	if err != nil {
 		return nil, err
 	}
@@ -322,10 +322,10 @@ func (c *CNIConfig) getLegacyCachedResult(netName, cniVersion string, rt *Runtim
 	// should match the config version unless the config was changed
 	// while the container was running.
 	result, err = result.GetAsVersion(cniVersion)
-	if err != nil && resultCniVersion != cniVersion {
-		return nil, fmt.Errorf("failed to convert cached result version %q to config version %q: %v", resultCniVersion, cniVersion, err)
+	if err != nil {
+		return nil, fmt.Errorf("failed to convert cached result to config version %q: %w", cniVersion, err)
 	}
-	return result, err
+	return result, nil
 }
 
 func (c *CNIConfig) getCachedResult(netName, cniVersion string, rt *RuntimeConf) (types.Result, error) {
@@ -346,18 +346,11 @@ func (c *CNIConfig) getCachedResult(netName, cniVersion string, rt *RuntimeConf)
 
 	newBytes, err := json.Marshal(&cachedInfo.RawResult)
 	if err != nil {
-		return nil, fmt.Errorf("failed to marshal cached network %q config: %v", netName, err)
+		return nil, fmt.Errorf("failed to marshal cached network %q config: %w", netName, err)
 	}
 
-	// Read the version of the cached result
-	decoder := version.ConfigDecoder{}
-	resultCniVersion, err := decoder.Decode(newBytes)
-	if err != nil {
-		return nil, err
-	}
-
-	// Ensure we can understand the result
-	result, err := version.NewResult(resultCniVersion, newBytes)
+	// Load the cached result
+	result, err := create.CreateFromBytes(newBytes)
 	if err != nil {
 		return nil, err
 	}
@@ -367,10 +360,10 @@ func (c *CNIConfig) getCachedResult(netName, cniVersion string, rt *RuntimeConf)
 	// should match the config version unless the config was changed
 	// while the container was running.
 	result, err = result.GetAsVersion(cniVersion)
-	if err != nil && resultCniVersion != cniVersion {
-		return nil, fmt.Errorf("failed to convert cached result version %q to config version %q: %v", resultCniVersion, cniVersion, err)
+	if err != nil {
+		return nil, fmt.Errorf("failed to convert cached result to config version %q: %w", cniVersion, err)
 	}
-	return result, err
+	return result, nil
 }
 
 // GetNetworkListCachedResult returns the cached Result of the previous
@@ -428,12 +421,12 @@ func (c *CNIConfig) AddNetworkList(ctx context.Context, list *NetworkConfigList,
 	for _, net := range list.Plugins {
 		result, err = c.addNetwork(ctx, list.Name, list.CNIVersion, net, result, rt)
 		if err != nil {
-			return nil, err
+			return nil, fmt.Errorf("plugin %s failed (add): %w", pluginDescription(net.Network), err)
 		}
 	}
 
 	if err = c.cacheAdd(result, list.Bytes, list.Name, rt); err != nil {
-		return nil, fmt.Errorf("failed to set network %q cached result: %v", list.Name, err)
+		return nil, fmt.Errorf("failed to set network %q cached result: %w", list.Name, err)
 	}
 
 	return result, nil
@@ -469,7 +462,7 @@ func (c *CNIConfig) CheckNetworkList(ctx context.Context, list *NetworkConfigLis
 
 	cachedResult, err := c.getCachedResult(list.Name, list.CNIVersion, rt)
 	if err != nil {
-		return fmt.Errorf("failed to get network %q cached result: %v", list.Name, err)
+		return fmt.Errorf("failed to get network %q cached result: %w", list.Name, err)
 	}
 
 	for _, net := range list.Plugins {
@@ -506,14 +499,14 @@ func (c *CNIConfig) DelNetworkList(ctx context.Context, list *NetworkConfigList,
 	} else if gtet {
 		cachedResult, err = c.getCachedResult(list.Name, list.CNIVersion, rt)
 		if err != nil {
-			return fmt.Errorf("failed to get network %q cached result: %v", list.Name, err)
+			return fmt.Errorf("failed to get network %q cached result: %w", list.Name, err)
 		}
 	}
 
 	for i := len(list.Plugins) - 1; i >= 0; i-- {
 		net := list.Plugins[i]
 		if err := c.delNetwork(ctx, list.Name, list.CNIVersion, net, cachedResult, rt); err != nil {
-			return err
+			return fmt.Errorf("plugin %s failed (delete): %w", pluginDescription(net.Network), err)
 		}
 	}
 	_ = c.cacheDel(list.Name, rt)
@@ -521,6 +514,19 @@ func (c *CNIConfig) DelNetworkList(ctx context.Context, list *NetworkConfigList,
 	return nil
 }
 
+func pluginDescription(net *types.NetConf) string {
+	if net == nil {
+		return "<missing>"
+	}
+	pluginType := net.Type
+	out := fmt.Sprintf("type=%q", pluginType)
+	name := net.Name
+	if name != "" {
+		out += fmt.Sprintf(" name=%q", name)
+	}
+	return out
+}
+
 // AddNetwork executes the plugin with the ADD command
 func (c *CNIConfig) AddNetwork(ctx context.Context, net *NetworkConfig, rt *RuntimeConf) (types.Result, error) {
 	result, err := c.addNetwork(ctx, net.Network.Name, net.Network.CNIVersion, net, nil, rt)
@@ -529,7 +535,7 @@ func (c *CNIConfig) AddNetwork(ctx context.Context, net *NetworkConfig, rt *Runt
 	}
 
 	if err = c.cacheAdd(result, net.Bytes, net.Network.Name, rt); err != nil {
-		return nil, fmt.Errorf("failed to set network %q cached result: %v", net.Network.Name, err)
+		return nil, fmt.Errorf("failed to set network %q cached result: %w", net.Network.Name, err)
 	}
 
 	return result, nil
@@ -546,7 +552,7 @@ func (c *CNIConfig) CheckNetwork(ctx context.Context, net *NetworkConfig, rt *Ru
 
 	cachedResult, err := c.getCachedResult(net.Network.Name, net.Network.CNIVersion, rt)
 	if err != nil {
-		return fmt.Errorf("failed to get network %q cached result: %v", net.Network.Name, err)
+		return fmt.Errorf("failed to get network %q cached result: %w", net.Network.Name, err)
 	}
 	return c.checkNetwork(ctx, net.Network.Name, net.Network.CNIVersion, net, cachedResult, rt)
 }
@@ -561,7 +567,7 @@ func (c *CNIConfig) DelNetwork(ctx context.Context, net *NetworkConfig, rt *Runt
 	} else if gtet {
 		cachedResult, err = c.getCachedResult(net.Network.Name, net.Network.CNIVersion, rt)
 		if err != nil {
-			return fmt.Errorf("failed to get network %q cached result: %v", net.Network.Name, err)
+			return fmt.Errorf("failed to get network %q cached result: %w", net.Network.Name, err)
 		}
 	}
 

vendor/github.com/containernetworking/cni/libcni/conf.go

@@ -43,7 +43,7 @@ func (e NoConfigsFoundError) Error() string {
 func ConfFromBytes(bytes []byte) (*NetworkConfig, error) {
 	conf := &NetworkConfig{Bytes: bytes}
 	if err := json.Unmarshal(bytes, &conf.Network); err != nil {
-		return nil, fmt.Errorf("error parsing configuration: %s", err)
+		return nil, fmt.Errorf("error parsing configuration: %w", err)
 	}
 	if conf.Network.Type == "" {
 		return nil, fmt.Errorf("error parsing configuration: missing 'type'")
@@ -54,7 +54,7 @@ func ConfFromBytes(bytes []byte) (*NetworkConfig, error) {
 func ConfFromFile(filename string) (*NetworkConfig, error) {
 	bytes, err := ioutil.ReadFile(filename)
 	if err != nil {
-		return nil, fmt.Errorf("error reading %s: %s", filename, err)
+		return nil, fmt.Errorf("error reading %s: %w", filename, err)
 	}
 	return ConfFromBytes(bytes)
 }
@@ -62,7 +62,7 @@ func ConfFromFile(filename string) (*NetworkConfig, error) {
 func ConfListFromBytes(bytes []byte) (*NetworkConfigList, error) {
 	rawList := make(map[string]interface{})
 	if err := json.Unmarshal(bytes, &rawList); err != nil {
-		return nil, fmt.Errorf("error parsing configuration list: %s", err)
+		return nil, fmt.Errorf("error parsing configuration list: %w", err)
 	}
 
 	rawName, ok := rawList["name"]
@@ -114,11 +114,11 @@ func ConfListFromBytes(bytes []byte) (*NetworkConfigList, error) {
 	for i, conf := range plugins {
 		newBytes, err := json.Marshal(conf)
 		if err != nil {
-			return nil, fmt.Errorf("failed to marshal plugin config %d: %v", i, err)
+			return nil, fmt.Errorf("failed to marshal plugin config %d: %w", i, err)
 		}
 		netConf, err := ConfFromBytes(newBytes)
 		if err != nil {
-			return nil, fmt.Errorf("failed to parse plugin config %d: %v", i, err)
+			return nil, fmt.Errorf("failed to parse plugin config %d: %w", i, err)
 		}
 		list.Plugins = append(list.Plugins, netConf)
 	}
@@ -129,7 +129,7 @@ func ConfListFromBytes(bytes []byte) (*NetworkConfigList, error) {
 func ConfListFromFile(filename string) (*NetworkConfigList, error) {
 	bytes, err := ioutil.ReadFile(filename)
 	if err != nil {
-		return nil, fmt.Errorf("error reading %s: %s", filename, err)
+		return nil, fmt.Errorf("error reading %s: %w", filename, err)
 	}
 	return ConfListFromBytes(bytes)
 }
@@ -218,7 +218,7 @@ func InjectConf(original *NetworkConfig, newValues map[string]interface{}) (*Net
 	config := make(map[string]interface{})
 	err := json.Unmarshal(original.Bytes, &config)
 	if err != nil {
-		return nil, fmt.Errorf("unmarshal existing network bytes: %s", err)
+		return nil, fmt.Errorf("unmarshal existing network bytes: %w", err)
 	}
 
 	for key, value := range newValues {

vendor/github.com/containernetworking/cni/pkg/invoke/exec.go

@@ -20,6 +20,7 @@ import (
 	"os"
 
 	"github.com/containernetworking/cni/pkg/types"
+	"github.com/containernetworking/cni/pkg/types/create"
 	"github.com/containernetworking/cni/pkg/version"
 )
 
@@ -83,14 +84,7 @@ func ExecPluginWithResult(ctx context.Context, pluginPath string, netconf []byte
 		return nil, err
 	}
 
-	// Plugin must return result in same version as specified in netconf
-	versionDecoder := &version.ConfigDecoder{}
-	confVersion, err := versionDecoder.Decode(netconf)
-	if err != nil {
-		return nil, err
-	}
-
-	return version.NewResult(confVersion, stdoutBytes)
+	return create.CreateFromBytes(stdoutBytes)
 }
 
 func ExecPluginWithoutResult(ctx context.Context, pluginPath string, netconf []byte, args CNIArgs, exec Exec) error {

vendor/github.com/containernetworking/cni/pkg/types/020/types.go

@@ -22,25 +22,47 @@ import (
 	"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}
+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
 	}
-	return result, nil
+	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) {
-	// We expect version 0.1.0/0.2.0 results
-	result020, err := r.GetAsVersion(ImplementedSpecVersion)
+	result020, err := convert.Convert(r, ImplementedSpecVersion)
 	if err != nil {
 		return nil, err
 	}
@@ -51,6 +73,32 @@ func GetResult(r types.Result) (*Result, error) {
 	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"`
@@ -60,17 +108,16 @@ type Result struct {
 }
 
 func (r *Result) Version() string {
-	return ImplementedSpecVersion
+	return r.CNIVersion
 }
 
 func (r *Result) GetAsVersion(version string) (types.Result, error) {
-	for _, supportedVersion := range SupportedVersions {
-		if version == supportedVersion {
-			r.CNIVersion = version
-			return r, nil
-		}
+	// 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 nil, fmt.Errorf("cannot convert version %q to %s", SupportedVersions, version)
+	return convert.Convert(r, version)
 }
 
 func (r *Result) Print() error {
@@ -93,6 +140,22 @@ type IPConfig struct {
 	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
 

vendor/github.com/containernetworking/cni/pkg/types/040/types.go

@@ -0,0 +1,306 @@
+// 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 types040
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net"
+	"os"
+
+	"github.com/containernetworking/cni/pkg/types"
+	types020 "github.com/containernetworking/cni/pkg/types/020"
+	convert "github.com/containernetworking/cni/pkg/types/internal"
+)
+
+const ImplementedSpecVersion string = "0.4.0"
+
+var supportedVersions = []string{"0.3.0", "0.3.1", ImplementedSpecVersion}
+
+// Register converters for all versions less than the implemented spec version
+func init() {
+	// Up-converters
+	convert.RegisterConverter("0.1.0", supportedVersions, convertFrom02x)
+	convert.RegisterConverter("0.2.0", supportedVersions, convertFrom02x)
+	convert.RegisterConverter("0.3.0", supportedVersions, convertInternal)
+	convert.RegisterConverter("0.3.1", supportedVersions, convertInternal)
+
+	// Down-converters
+	convert.RegisterConverter("0.4.0", []string{"0.3.0", "0.3.1"}, convertInternal)
+	convert.RegisterConverter("0.4.0", []string{"0.1.0", "0.2.0"}, convertTo02x)
+	convert.RegisterConverter("0.3.1", []string{"0.1.0", "0.2.0"}, convertTo02x)
+	convert.RegisterConverter("0.3.0", []string{"0.1.0", "0.2.0"}, convertTo02x)
+
+	// Creator
+	convert.RegisterCreator(supportedVersions, NewResult)
+}
+
+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 {
+			return result, nil
+		}
+	}
+	return nil, fmt.Errorf("result type supports %v but unmarshalled CNIVersion is %q",
+		supportedVersions, result.CNIVersion)
+}
+
+func GetResult(r types.Result) (*Result, error) {
+	resultCurrent, err := r.GetAsVersion(ImplementedSpecVersion)
+	if err != nil {
+		return nil, err
+	}
+	result, ok := resultCurrent.(*Result)
+	if !ok {
+		return nil, fmt.Errorf("failed to convert result")
+	}
+	return result, nil
+}
+
+func NewResultFromResult(result types.Result) (*Result, error) {
+	newResult, err := convert.Convert(result, ImplementedSpecVersion)
+	if err != nil {
+		return nil, err
+	}
+	return newResult.(*Result), nil
+}
+
+// Result is what gets returned from the plugin (via stdout) to the caller
+type Result struct {
+	CNIVersion string         `json:"cniVersion,omitempty"`
+	Interfaces []*Interface   `json:"interfaces,omitempty"`
+	IPs        []*IPConfig    `json:"ips,omitempty"`
+	Routes     []*types.Route `json:"routes,omitempty"`
+	DNS        types.DNS      `json:"dns,omitempty"`
+}
+
+func convert020IPConfig(from *types020.IPConfig, ipVersion string) *IPConfig {
+	return &IPConfig{
+		Version: ipVersion,
+		Address: from.IP,
+		Gateway: from.Gateway,
+	}
+}
+
+func convertFrom02x(from types.Result, toVersion string) (types.Result, error) {
+	fromResult := from.(*types020.Result)
+	toResult := &Result{
+		CNIVersion: toVersion,
+		DNS:        *fromResult.DNS.Copy(),
+		Routes:     []*types.Route{},
+	}
+	if fromResult.IP4 != nil {
+		toResult.IPs = append(toResult.IPs, convert020IPConfig(fromResult.IP4, "4"))
+		for _, fromRoute := range fromResult.IP4.Routes {
+			toResult.Routes = append(toResult.Routes, fromRoute.Copy())
+		}
+	}
+
+	if fromResult.IP6 != nil {
+		toResult.IPs = append(toResult.IPs, convert020IPConfig(fromResult.IP6, "6"))
+		for _, fromRoute := range fromResult.IP6.Routes {
+			toResult.Routes = append(toResult.Routes, fromRoute.Copy())
+		}
+	}
+
+	return toResult, nil
+}
+
+func convertInternal(from types.Result, toVersion string) (types.Result, error) {
+	fromResult := from.(*Result)
+	toResult := &Result{
+		CNIVersion: toVersion,
+		DNS:        *fromResult.DNS.Copy(),
+		Routes:     []*types.Route{},
+	}
+	for _, fromIntf := range fromResult.Interfaces {
+		toResult.Interfaces = append(toResult.Interfaces, fromIntf.Copy())
+	}
+	for _, fromIPC := range fromResult.IPs {
+		toResult.IPs = append(toResult.IPs, fromIPC.Copy())
+	}
+	for _, fromRoute := range fromResult.Routes {
+		toResult.Routes = append(toResult.Routes, fromRoute.Copy())
+	}
+	return toResult, nil
+}
+
+func convertTo02x(from types.Result, toVersion string) (types.Result, error) {
+	fromResult := from.(*Result)
+	toResult := &types020.Result{
+		CNIVersion: toVersion,
+		DNS:        *fromResult.DNS.Copy(),
+	}
+
+	for _, fromIP := range fromResult.IPs {
+		// Only convert the first IP address of each version as 0.2.0
+		// and earlier cannot handle multiple IP addresses
+		if fromIP.Version == "4" && toResult.IP4 == nil {
+			toResult.IP4 = &types020.IPConfig{
+				IP:      fromIP.Address,
+				Gateway: fromIP.Gateway,
+			}
+		} else if fromIP.Version == "6" && toResult.IP6 == nil {
+			toResult.IP6 = &types020.IPConfig{
+				IP:      fromIP.Address,
+				Gateway: fromIP.Gateway,
+			}
+		}
+		if toResult.IP4 != nil && toResult.IP6 != nil {
+			break
+		}
+	}
+
+	for _, fromRoute := range fromResult.Routes {
+		is4 := fromRoute.Dst.IP.To4() != nil
+		if is4 && toResult.IP4 != nil {
+			toResult.IP4.Routes = append(toResult.IP4.Routes, types.Route{
+				Dst: fromRoute.Dst,
+				GW:  fromRoute.GW,
+			})
+		} else if !is4 && toResult.IP6 != nil {
+			toResult.IP6.Routes = append(toResult.IP6.Routes, types.Route{
+				Dst: fromRoute.Dst,
+				GW:  fromRoute.GW,
+			})
+		}
+	}
+
+	// 0.2.0 and earlier require at least one IP address in the Result
+	if toResult.IP4 == nil && toResult.IP6 == nil {
+		return nil, fmt.Errorf("cannot convert: no valid IP addresses")
+	}
+
+	return toResult, nil
+}
+
+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
+}
+
+// Interface contains values about the created interfaces
+type Interface struct {
+	Name    string `json:"name"`
+	Mac     string `json:"mac,omitempty"`
+	Sandbox string `json:"sandbox,omitempty"`
+}
+
+func (i *Interface) String() string {
+	return fmt.Sprintf("%+v", *i)
+}
+
+func (i *Interface) Copy() *Interface {
+	if i == nil {
+		return nil
+	}
+	newIntf := *i
+	return &newIntf
+}
+
+// Int returns a pointer to the int value passed in.  Used to
+// set the IPConfig.Interface field.
+func Int(v int) *int {
+	return &v
+}
+
+// IPConfig contains values necessary to configure an IP address on an interface
+type IPConfig struct {
+	// IP version, either "4" or "6"
+	Version string
+	// Index into Result structs Interfaces list
+	Interface *int
+	Address   net.IPNet
+	Gateway   net.IP
+}
+
+func (i *IPConfig) String() string {
+	return fmt.Sprintf("%+v", *i)
+}
+
+func (i *IPConfig) Copy() *IPConfig {
+	if i == nil {
+		return nil
+	}
+
+	ipc := &IPConfig{
+		Version: i.Version,
+		Address: i.Address,
+		Gateway: i.Gateway,
+	}
+	if i.Interface != nil {
+		intf := *i.Interface
+		ipc.Interface = &intf
+	}
+	return ipc
+}
+
+// JSON (un)marshallable types
+type ipConfig struct {
+	Version   string      `json:"version"`
+	Interface *int        `json:"interface,omitempty"`
+	Address   types.IPNet `json:"address"`
+	Gateway   net.IP      `json:"gateway,omitempty"`
+}
+
+func (c *IPConfig) MarshalJSON() ([]byte, error) {
+	ipc := ipConfig{
+		Version:   c.Version,
+		Interface: c.Interface,
+		Address:   types.IPNet(c.Address),
+		Gateway:   c.Gateway,
+	}
+
+	return json.Marshal(ipc)
+}
+
+func (c *IPConfig) UnmarshalJSON(data []byte) error {
+	ipc := ipConfig{}
+	if err := json.Unmarshal(data, &ipc); err != nil {
+		return err
+	}
+
+	c.Version = ipc.Version
+	c.Interface = ipc.Interface
+	c.Address = net.IPNet(ipc.Address)
+	c.Gateway = ipc.Gateway
+	return nil
+}

vendor/github.com/containernetworking/cni/pkg/types/100/types.go

@@ -0,0 +1,307 @@
+// 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 types100
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net"
+	"os"
+
+	"github.com/containernetworking/cni/pkg/types"
+	types040 "github.com/containernetworking/cni/pkg/types/040"
+	convert "github.com/containernetworking/cni/pkg/types/internal"
+)
+
+const ImplementedSpecVersion string = "1.0.0"
+
+var supportedVersions = []string{ImplementedSpecVersion}
+
+// Register converters for all versions less than the implemented spec version
+func init() {
+	// Up-converters
+	convert.RegisterConverter("0.1.0", supportedVersions, convertFrom02x)
+	convert.RegisterConverter("0.2.0", supportedVersions, convertFrom02x)
+	convert.RegisterConverter("0.3.0", supportedVersions, convertFrom04x)
+	convert.RegisterConverter("0.3.1", supportedVersions, convertFrom04x)
+	convert.RegisterConverter("0.4.0", supportedVersions, convertFrom04x)
+
+	// Down-converters
+	convert.RegisterConverter("1.0.0", []string{"0.3.0", "0.3.1", "0.4.0"}, convertTo04x)
+	convert.RegisterConverter("1.0.0", []string{"0.1.0", "0.2.0"}, convertTo02x)
+
+	// Creator
+	convert.RegisterCreator(supportedVersions, NewResult)
+}
+
+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 {
+			return result, nil
+		}
+	}
+	return nil, fmt.Errorf("result type supports %v but unmarshalled CNIVersion is %q",
+		supportedVersions, result.CNIVersion)
+}
+
+func GetResult(r types.Result) (*Result, error) {
+	resultCurrent, err := r.GetAsVersion(ImplementedSpecVersion)
+	if err != nil {
+		return nil, err
+	}
+	result, ok := resultCurrent.(*Result)
+	if !ok {
+		return nil, fmt.Errorf("failed to convert result")
+	}
+	return result, nil
+}
+
+func NewResultFromResult(result types.Result) (*Result, error) {
+	newResult, err := convert.Convert(result, ImplementedSpecVersion)
+	if err != nil {
+		return nil, err
+	}
+	return newResult.(*Result), nil
+}
+
+// Result is what gets returned from the plugin (via stdout) to the caller
+type Result struct {
+	CNIVersion string         `json:"cniVersion,omitempty"`
+	Interfaces []*Interface   `json:"interfaces,omitempty"`
+	IPs        []*IPConfig    `json:"ips,omitempty"`
+	Routes     []*types.Route `json:"routes,omitempty"`
+	DNS        types.DNS      `json:"dns,omitempty"`
+}
+
+func convertFrom02x(from types.Result, toVersion string) (types.Result, error) {
+	result040, err := convert.Convert(from, "0.4.0")
+	if err != nil {
+		return nil, err
+	}
+	result100, err := convertFrom04x(result040, ImplementedSpecVersion)
+	if err != nil {
+		return nil, err
+	}
+	return result100, nil
+}
+
+func convertIPConfigFrom040(from *types040.IPConfig) *IPConfig {
+	to := &IPConfig{
+		Address: from.Address,
+		Gateway: from.Gateway,
+	}
+	if from.Interface != nil {
+		intf := *from.Interface
+		to.Interface = &intf
+	}
+	return to
+}
+
+func convertInterfaceFrom040(from *types040.Interface) *Interface {
+	return &Interface{
+		Name:    from.Name,
+		Mac:     from.Mac,
+		Sandbox: from.Sandbox,
+	}
+}
+
+func convertFrom04x(from types.Result, toVersion string) (types.Result, error) {
+	fromResult := from.(*types040.Result)
+	toResult := &Result{
+		CNIVersion: toVersion,
+		DNS:        *fromResult.DNS.Copy(),
+		Routes:     []*types.Route{},
+	}
+	for _, fromIntf := range fromResult.Interfaces {
+		toResult.Interfaces = append(toResult.Interfaces, convertInterfaceFrom040(fromIntf))
+	}
+	for _, fromIPC := range fromResult.IPs {
+		toResult.IPs = append(toResult.IPs, convertIPConfigFrom040(fromIPC))
+	}
+	for _, fromRoute := range fromResult.Routes {
+		toResult.Routes = append(toResult.Routes, fromRoute.Copy())
+	}
+	return toResult, nil
+}
+
+func convertIPConfigTo040(from *IPConfig) *types040.IPConfig {
+	version := "6"
+	if from.Address.IP.To4() != nil {
+		version = "4"
+	}
+	to := &types040.IPConfig{
+		Version: version,
+		Address: from.Address,
+		Gateway: from.Gateway,
+	}
+	if from.Interface != nil {
+		intf := *from.Interface
+		to.Interface = &intf
+	}
+	return to
+}
+
+func convertInterfaceTo040(from *Interface) *types040.Interface {
+	return &types040.Interface{
+		Name:    from.Name,
+		Mac:     from.Mac,
+		Sandbox: from.Sandbox,
+	}
+}
+
+func convertTo04x(from types.Result, toVersion string) (types.Result, error) {
+	fromResult := from.(*Result)
+	toResult := &types040.Result{
+		CNIVersion: toVersion,
+		DNS:        *fromResult.DNS.Copy(),
+		Routes:     []*types.Route{},
+	}
+	for _, fromIntf := range fromResult.Interfaces {
+		toResult.Interfaces = append(toResult.Interfaces, convertInterfaceTo040(fromIntf))
+	}
+	for _, fromIPC := range fromResult.IPs {
+		toResult.IPs = append(toResult.IPs, convertIPConfigTo040(fromIPC))
+	}
+	for _, fromRoute := range fromResult.Routes {
+		toResult.Routes = append(toResult.Routes, fromRoute.Copy())
+	}
+	return toResult, nil
+}
+
+func convertTo02x(from types.Result, toVersion string) (types.Result, error) {
+	// First convert to 0.4.0
+	result040, err := convertTo04x(from, "0.4.0")
+	if err != nil {
+		return nil, err
+	}
+	result02x, err := convert.Convert(result040, toVersion)
+	if err != nil {
+		return nil, err
+	}
+	return result02x, nil
+}
+
+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
+}
+
+// Interface contains values about the created interfaces
+type Interface struct {
+	Name    string `json:"name"`
+	Mac     string `json:"mac,omitempty"`
+	Sandbox string `json:"sandbox,omitempty"`
+}
+
+func (i *Interface) String() string {
+	return fmt.Sprintf("%+v", *i)
+}
+
+func (i *Interface) Copy() *Interface {
+	if i == nil {
+		return nil
+	}
+	newIntf := *i
+	return &newIntf
+}
+
+// Int returns a pointer to the int value passed in.  Used to
+// set the IPConfig.Interface field.
+func Int(v int) *int {
+	return &v
+}
+
+// IPConfig contains values necessary to configure an IP address on an interface
+type IPConfig struct {
+	// Index into Result structs Interfaces list
+	Interface *int
+	Address   net.IPNet
+	Gateway   net.IP
+}
+
+func (i *IPConfig) String() string {
+	return fmt.Sprintf("%+v", *i)
+}
+
+func (i *IPConfig) Copy() *IPConfig {
+	if i == nil {
+		return nil
+	}
+
+	ipc := &IPConfig{
+		Address: i.Address,
+		Gateway: i.Gateway,
+	}
+	if i.Interface != nil {
+		intf := *i.Interface
+		ipc.Interface = &intf
+	}
+	return ipc
+}
+
+// JSON (un)marshallable types
+type ipConfig struct {
+	Interface *int        `json:"interface,omitempty"`
+	Address   types.IPNet `json:"address"`
+	Gateway   net.IP      `json:"gateway,omitempty"`
+}
+
+func (c *IPConfig) MarshalJSON() ([]byte, error) {
+	ipc := ipConfig{
+		Interface: c.Interface,
+		Address:   types.IPNet(c.Address),
+		Gateway:   c.Gateway,
+	}
+
+	return json.Marshal(ipc)
+}
+
+func (c *IPConfig) UnmarshalJSON(data []byte) error {
+	ipc := ipConfig{}
+	if err := json.Unmarshal(data, &ipc); err != nil {
+		return err
+	}
+
+	c.Interface = ipc.Interface
+	c.Address = net.IPNet(ipc.Address)
+	c.Gateway = ipc.Gateway
+	return nil
+}

vendor/github.com/containernetworking/cni/pkg/types/args.go

@@ -91,16 +91,26 @@ func LoadArgs(args string, container interface{}) error {
 			unknownArgs = append(unknownArgs, pair)
 			continue
 		}
-		keyFieldIface := keyField.Addr().Interface()
-		u, ok := keyFieldIface.(encoding.TextUnmarshaler)
+
+		var keyFieldInterface interface{}
+		switch {
+		case keyField.Kind() == reflect.Ptr:
+			keyField.Set(reflect.New(keyField.Type().Elem()))
+			keyFieldInterface = keyField.Interface()
+		case keyField.CanAddr() && keyField.Addr().CanInterface():
+			keyFieldInterface = keyField.Addr().Interface()
+		default:
+			return UnmarshalableArgsError{fmt.Errorf("field '%s' has no valid interface", keyString)}
+		}
+		u, ok := keyFieldInterface.(encoding.TextUnmarshaler)
 		if !ok {
 			return UnmarshalableArgsError{fmt.Errorf(
 				"ARGS: cannot unmarshal into field '%s' - type '%s' does not implement encoding.TextUnmarshaler",
-				keyString, reflect.TypeOf(keyFieldIface))}
+				keyString, reflect.TypeOf(keyFieldInterface))}
 		}
 		err := u.UnmarshalText([]byte(valueString))
 		if err != nil {
-			return fmt.Errorf("ARGS: error parsing value of pair %q: %v)", pair, err)
+			return fmt.Errorf("ARGS: error parsing value of pair %q: %w", pair, err)
 		}
 	}
 

vendor/github.com/containernetworking/cni/pkg/types/create/create.go

@@ -0,0 +1,56 @@
+// 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 create
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/containernetworking/cni/pkg/types"
+	convert "github.com/containernetworking/cni/pkg/types/internal"
+)
+
+// DecodeVersion returns the CNI version from CNI configuration or result JSON,
+// or an error if the operation could not be performed.
+func DecodeVersion(jsonBytes []byte) (string, error) {
+	var conf struct {
+		CNIVersion string `json:"cniVersion"`
+	}
+	err := json.Unmarshal(jsonBytes, &conf)
+	if err != nil {
+		return "", fmt.Errorf("decoding version from network config: %w", err)
+	}
+	if conf.CNIVersion == "" {
+		return "0.1.0", nil
+	}
+	return conf.CNIVersion, nil
+}
+
+// Create creates a CNI Result using the given JSON with the expected
+// version, or an error if the creation could not be performed
+func Create(version string, bytes []byte) (types.Result, error) {
+	return convert.Create(version, bytes)
+}
+
+// CreateFromBytes creates a CNI Result from the given JSON, automatically
+// detecting the CNI spec version of the result. An error is returned if the
+// operation could not be performed.
+func CreateFromBytes(bytes []byte) (types.Result, error) {
+	version, err := DecodeVersion(bytes)
+	if err != nil {
+		return nil, err
+	}
+	return convert.Create(version, bytes)
+}

vendor/github.com/containernetworking/cni/pkg/types/current/types.go

@@ -1,276 +0,0 @@
-// 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 current
-
-import (
-	"encoding/json"
-	"fmt"
-	"io"
-	"net"
-	"os"
-
-	"github.com/containernetworking/cni/pkg/types"
-	"github.com/containernetworking/cni/pkg/types/020"
-)
-
-const ImplementedSpecVersion string = "0.4.0"
-
-var SupportedVersions = []string{"0.3.0", "0.3.1", ImplementedSpecVersion}
-
-func NewResult(data []byte) (types.Result, error) {
-	result := &Result{}
-	if err := json.Unmarshal(data, result); err != nil {
-		return nil, err
-	}
-	return result, nil
-}
-
-func GetResult(r types.Result) (*Result, error) {
-	resultCurrent, err := r.GetAsVersion(ImplementedSpecVersion)
-	if err != nil {
-		return nil, err
-	}
-	result, ok := resultCurrent.(*Result)
-	if !ok {
-		return nil, fmt.Errorf("failed to convert result")
-	}
-	return result, nil
-}
-
-var resultConverters = []struct {
-	versions []string
-	convert  func(types.Result) (*Result, error)
-}{
-	{types020.SupportedVersions, convertFrom020},
-	{SupportedVersions, convertFrom030},
-}
-
-func convertFrom020(result types.Result) (*Result, error) {
-	oldResult, err := types020.GetResult(result)
-	if err != nil {
-		return nil, err
-	}
-
-	newResult := &Result{
-		CNIVersion: ImplementedSpecVersion,
-		DNS:        oldResult.DNS,
-		Routes:     []*types.Route{},
-	}
-
-	if oldResult.IP4 != nil {
-		newResult.IPs = append(newResult.IPs, &IPConfig{
-			Version: "4",
-			Address: oldResult.IP4.IP,
-			Gateway: oldResult.IP4.Gateway,
-		})
-		for _, route := range oldResult.IP4.Routes {
-			newResult.Routes = append(newResult.Routes, &types.Route{
-				Dst: route.Dst,
-				GW:  route.GW,
-			})
-		}
-	}
-
-	if oldResult.IP6 != nil {
-		newResult.IPs = append(newResult.IPs, &IPConfig{
-			Version: "6",
-			Address: oldResult.IP6.IP,
-			Gateway: oldResult.IP6.Gateway,
-		})
-		for _, route := range oldResult.IP6.Routes {
-			newResult.Routes = append(newResult.Routes, &types.Route{
-				Dst: route.Dst,
-				GW:  route.GW,
-			})
-		}
-	}
-
-	return newResult, nil
-}
-
-func convertFrom030(result types.Result) (*Result, error) {
-	newResult, ok := result.(*Result)
-	if !ok {
-		return nil, fmt.Errorf("failed to convert result")
-	}
-	newResult.CNIVersion = ImplementedSpecVersion
-	return newResult, nil
-}
-
-func NewResultFromResult(result types.Result) (*Result, error) {
-	version := result.Version()
-	for _, converter := range resultConverters {
-		for _, supportedVersion := range converter.versions {
-			if version == supportedVersion {
-				return converter.convert(result)
-			}
-		}
-	}
-	return nil, fmt.Errorf("unsupported CNI result22 version %q", version)
-}
-
-// Result is what gets returned from the plugin (via stdout) to the caller
-type Result struct {
-	CNIVersion string         `json:"cniVersion,omitempty"`
-	Interfaces []*Interface   `json:"interfaces,omitempty"`
-	IPs        []*IPConfig    `json:"ips,omitempty"`
-	Routes     []*types.Route `json:"routes,omitempty"`
-	DNS        types.DNS      `json:"dns,omitempty"`
-}
-
-// Convert to the older 0.2.0 CNI spec Result type
-func (r *Result) convertTo020() (*types020.Result, error) {
-	oldResult := &types020.Result{
-		CNIVersion: types020.ImplementedSpecVersion,
-		DNS:        r.DNS,
-	}
-
-	for _, ip := range r.IPs {
-		// Only convert the first IP address of each version as 0.2.0
-		// and earlier cannot handle multiple IP addresses
-		if ip.Version == "4" && oldResult.IP4 == nil {
-			oldResult.IP4 = &types020.IPConfig{
-				IP:      ip.Address,
-				Gateway: ip.Gateway,
-			}
-		} else if ip.Version == "6" && oldResult.IP6 == nil {
-			oldResult.IP6 = &types020.IPConfig{
-				IP:      ip.Address,
-				Gateway: ip.Gateway,
-			}
-		}
-
-		if oldResult.IP4 != nil && oldResult.IP6 != nil {
-			break
-		}
-	}
-
-	for _, route := range r.Routes {
-		is4 := route.Dst.IP.To4() != nil
-		if is4 && oldResult.IP4 != nil {
-			oldResult.IP4.Routes = append(oldResult.IP4.Routes, types.Route{
-				Dst: route.Dst,
-				GW:  route.GW,
-			})
-		} else if !is4 && oldResult.IP6 != nil {
-			oldResult.IP6.Routes = append(oldResult.IP6.Routes, types.Route{
-				Dst: route.Dst,
-				GW:  route.GW,
-			})
-		}
-	}
-
-	if oldResult.IP4 == nil && oldResult.IP6 == nil {
-		return nil, fmt.Errorf("cannot convert: no valid IP addresses")
-	}
-
-	return oldResult, nil
-}
-
-func (r *Result) Version() string {
-	return ImplementedSpecVersion
-}
-
-func (r *Result) GetAsVersion(version string) (types.Result, error) {
-	switch version {
-	case "0.3.0", "0.3.1", ImplementedSpecVersion:
-		r.CNIVersion = version
-		return r, nil
-	case types020.SupportedVersions[0], types020.SupportedVersions[1], types020.SupportedVersions[2]:
-		return r.convertTo020()
-	}
-	return nil, fmt.Errorf("cannot convert version 0.3.x to %q", 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
-}
-
-// Convert this old version result to the current CNI version result
-func (r *Result) Convert() (*Result, error) {
-	return r, nil
-}
-
-// Interface contains values about the created interfaces
-type Interface struct {
-	Name    string `json:"name"`
-	Mac     string `json:"mac,omitempty"`
-	Sandbox string `json:"sandbox,omitempty"`
-}
-
-func (i *Interface) String() string {
-	return fmt.Sprintf("%+v", *i)
-}
-
-// Int returns a pointer to the int value passed in.  Used to
-// set the IPConfig.Interface field.
-func Int(v int) *int {
-	return &v
-}
-
-// IPConfig contains values necessary to configure an IP address on an interface
-type IPConfig struct {
-	// IP version, either "4" or "6"
-	Version string
-	// Index into Result structs Interfaces list
-	Interface *int
-	Address   net.IPNet
-	Gateway   net.IP
-}
-
-func (i *IPConfig) String() string {
-	return fmt.Sprintf("%+v", *i)
-}
-
-// JSON (un)marshallable types
-type ipConfig struct {
-	Version   string      `json:"version"`
-	Interface *int        `json:"interface,omitempty"`
-	Address   types.IPNet `json:"address"`
-	Gateway   net.IP      `json:"gateway,omitempty"`
-}
-
-func (c *IPConfig) MarshalJSON() ([]byte, error) {
-	ipc := ipConfig{
-		Version:   c.Version,
-		Interface: c.Interface,
-		Address:   types.IPNet(c.Address),
-		Gateway:   c.Gateway,
-	}
-
-	return json.Marshal(ipc)
-}
-
-func (c *IPConfig) UnmarshalJSON(data []byte) error {
-	ipc := ipConfig{}
-	if err := json.Unmarshal(data, &ipc); err != nil {
-		return err
-	}
-
-	c.Version = ipc.Version
-	c.Interface = ipc.Interface
-	c.Address = net.IPNet(ipc.Address)
-	c.Gateway = ipc.Gateway
-	return nil
-}

vendor/github.com/containernetworking/cni/pkg/types/internal/convert.go

@@ -0,0 +1,92 @@
+// 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 convert
+
+import (
+	"fmt"
+
+	"github.com/containernetworking/cni/pkg/types"
+)
+
+// ConvertFn should convert from the given arbitrary Result type into a
+// Result implementing CNI specification version passed in toVersion.
+// The function is guaranteed to be passed a Result type matching the
+// fromVersion it was registered with, and is guaranteed to be
+// passed a toVersion matching one of the toVersions it was registered with.
+type ConvertFn func(from types.Result, toVersion string) (types.Result, error)
+
+type converter struct {
+	// fromVersion is the CNI Result spec version that convertFn accepts
+	fromVersion string
+	// toVersions is a list of versions that convertFn can convert to
+	toVersions []string
+	convertFn  ConvertFn
+}
+
+var converters []*converter
+
+func findConverter(fromVersion, toVersion string) *converter {
+	for _, c := range converters {
+		if c.fromVersion == fromVersion {
+			for _, v := range c.toVersions {
+				if v == toVersion {
+					return c
+				}
+			}
+		}
+	}
+	return nil
+}
+
+// Convert converts a CNI Result to the requested CNI specification version,
+// or returns an error if the conversion could not be performed or failed
+func Convert(from types.Result, toVersion string) (types.Result, error) {
+	if toVersion == "" {
+		toVersion = "0.1.0"
+	}
+
+	fromVersion := from.Version()
+
+	// Shortcut for same version
+	if fromVersion == toVersion {
+		return from, nil
+	}
+
+	// Otherwise find the right converter
+	c := findConverter(fromVersion, toVersion)
+	if c == nil {
+		return nil, fmt.Errorf("no converter for CNI result version %s to %s",
+			fromVersion, toVersion)
+	}
+	return c.convertFn(from, toVersion)
+}
+
+// RegisterConverter registers a CNI Result converter. SHOULD NOT BE CALLED
+// EXCEPT FROM CNI ITSELF.
+func RegisterConverter(fromVersion string, toVersions []string, convertFn ConvertFn) {
+	// Make sure there is no converter already registered for these
+	// from and to versions
+	for _, v := range toVersions {
+		if findConverter(fromVersion, v) != nil {
+			panic(fmt.Sprintf("converter already registered for %s to %s",
+				fromVersion, v))
+		}
+	}
+	converters = append(converters, &converter{
+		fromVersion: fromVersion,
+		toVersions:  toVersions,
+		convertFn:   convertFn,
+	})
+}

vendor/github.com/containernetworking/cni/pkg/types/internal/create.go

@@ -0,0 +1,66 @@
+// 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 convert
+
+import (
+	"fmt"
+
+	"github.com/containernetworking/cni/pkg/types"
+)
+
+type ResultFactoryFunc func([]byte) (types.Result, error)
+
+type creator struct {
+	// CNI Result spec versions that createFn can create a Result for
+	versions []string
+	createFn ResultFactoryFunc
+}
+
+var creators []*creator
+
+func findCreator(version string) *creator {
+	for _, c := range creators {
+		for _, v := range c.versions {
+			if v == version {
+				return c
+			}
+		}
+	}
+	return nil
+}
+
+// Create creates a CNI Result using the given JSON, or an error if the creation
+// could not be performed
+func Create(version string, bytes []byte) (types.Result, error) {
+	if c := findCreator(version); c != nil {
+		return c.createFn(bytes)
+	}
+	return nil, fmt.Errorf("unsupported CNI result version %q", version)
+}
+
+// RegisterCreator registers a CNI Result creator. SHOULD NOT BE CALLED
+// EXCEPT FROM CNI ITSELF.
+func RegisterCreator(versions []string, createFn ResultFactoryFunc) {
+	// Make sure there is no creator already registered for these versions
+	for _, v := range versions {
+		if findCreator(v) != nil {
+			panic(fmt.Sprintf("creator already registered for %s", v))
+		}
+	}
+	creators = append(creators, &creator{
+		versions: versions,
+		createFn: createFn,
+	})
+}

vendor/github.com/containernetworking/cni/pkg/types/types.go

@@ -83,8 +83,6 @@ type NetConfList struct {
 	Plugins      []*NetConf `json:"plugins,omitempty"`
 }
 
-type ResultFactoryFunc func([]byte) (Result, error)
-
 // Result is an interface that provides the result of plugin execution
 type Result interface {
 	// The highest CNI specification result version the result supports
@@ -118,6 +116,24 @@ type DNS struct {
 	Options     []string `json:"options,omitempty"`
 }
 
+func (d *DNS) Copy() *DNS {
+	if d == nil {
+		return nil
+	}
+
+	to := &DNS{Domain: d.Domain}
+	for _, ns := range d.Nameservers {
+		to.Nameservers = append(to.Nameservers, ns)
+	}
+	for _, s := range d.Search {
+		to.Search = append(to.Search, s)
+	}
+	for _, o := range d.Options {
+		to.Options = append(to.Options, o)
+	}
+	return to
+}
+
 type Route struct {
 	Dst net.IPNet
 	GW  net.IP
@@ -127,6 +143,17 @@ func (r *Route) String() string {
 	return fmt.Sprintf("%+v", *r)
 }
 
+func (r *Route) Copy() *Route {
+	if r == nil {
+		return nil
+	}
+
+	return &Route{
+		Dst: r.Dst,
+		GW:  r.GW,
+	}
+}
+
 // Well known error codes
 // see https://github.com/containernetworking/cni/blob/master/SPEC.md#well-known-error-codes
 const (

vendor/github.com/containernetworking/cni/pkg/version/conf.go

@@ -15,23 +15,12 @@
 package version
 
 import (
-	"encoding/json"
-	"fmt"
+	"github.com/containernetworking/cni/pkg/types/create"
 )
 
 // ConfigDecoder can decode the CNI version available in network config data
 type ConfigDecoder struct{}
 
 func (*ConfigDecoder) Decode(jsonBytes []byte) (string, error) {
-	var conf struct {
-		CNIVersion string `json:"cniVersion"`
-	}
-	err := json.Unmarshal(jsonBytes, &conf)
-	if err != nil {
-		return "", fmt.Errorf("decoding version from network config: %s", err)
-	}
-	if conf.CNIVersion == "" {
-		return "0.1.0", nil
-	}
-	return conf.CNIVersion, nil
+	return create.DecodeVersion(jsonBytes)
 }

vendor/github.com/containernetworking/cni/pkg/version/plugin.go

@@ -68,7 +68,7 @@ func (*PluginDecoder) Decode(jsonBytes []byte) (PluginInfo, error) {
 	var info pluginInfo
 	err := json.Unmarshal(jsonBytes, &info)
 	if err != nil {
-		return nil, fmt.Errorf("decoding version info: %s", err)
+		return nil, fmt.Errorf("decoding version info: %w", err)
 	}
 	if info.CNIVersion_ == "" {
 		return nil, fmt.Errorf("decoding version info: missing field cniVersion")
@@ -97,20 +97,20 @@ func ParseVersion(version string) (int, int, int, error) {
 
 	major, err := strconv.Atoi(parts[0])
 	if err != nil {
-		return -1, -1, -1, fmt.Errorf("failed to convert major version part %q: %v", parts[0], err)
+		return -1, -1, -1, fmt.Errorf("failed to convert major version part %q: %w", parts[0], err)
 	}
 
 	if len(parts) >= 2 {
 		minor, err = strconv.Atoi(parts[1])
 		if err != nil {
-			return -1, -1, -1, fmt.Errorf("failed to convert minor version part %q: %v", parts[1], err)
+			return -1, -1, -1, fmt.Errorf("failed to convert minor version part %q: %w", parts[1], err)
 		}
 	}
 
 	if len(parts) >= 3 {
 		micro, err = strconv.Atoi(parts[2])
 		if err != nil {
-			return -1, -1, -1, fmt.Errorf("failed to convert micro version part %q: %v", parts[2], err)
+			return -1, -1, -1, fmt.Errorf("failed to convert micro version part %q: %w", parts[2], err)
 		}
 	}
 

vendor/github.com/containernetworking/cni/pkg/version/version.go

@@ -19,13 +19,13 @@ import (
 	"fmt"
 
 	"github.com/containernetworking/cni/pkg/types"
-	"github.com/containernetworking/cni/pkg/types/020"
-	"github.com/containernetworking/cni/pkg/types/current"
+	types100 "github.com/containernetworking/cni/pkg/types/100"
+	"github.com/containernetworking/cni/pkg/types/create"
 )
 
 // Current reports the version of the CNI spec implemented by this library
 func Current() string {
-	return "0.4.0"
+	return types100.ImplementedSpecVersion
 }
 
 // Legacy PluginInfo describes a plugin that is backwards compatible with the
@@ -36,29 +36,28 @@ func Current() string {
 // 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 All = PluginSupports("0.1.0", "0.2.0", "0.3.0", "0.3.1", "0.4.0", "1.0.0")
 
-var resultFactories = []struct {
-	supportedVersions []string
-	newResult         types.ResultFactoryFunc
-}{
-	{current.SupportedVersions, current.NewResult},
-	{types020.SupportedVersions, types020.NewResult},
+// VersionsFrom returns a list of versions starting from min, inclusive
+func VersionsStartingFrom(min string) PluginInfo {
+	out := []string{}
+	// cheat, just assume ordered
+	ok := false
+	for _, v := range All.SupportedVersions() {
+		if !ok && v == min {
+			ok = true
+		}
+		if ok {
+			out = append(out, v)
+		}
+	}
+	return PluginSupports(out...)
 }
 
 // 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)
+	return create.Create(version, resultBytes)
 }
 
 // ParsePrevResult parses a prevResult in a NetConf structure and sets
@@ -68,15 +67,22 @@ func ParsePrevResult(conf *types.NetConf) error {
 		return nil
 	}
 
+	// Prior to 1.0.0, Result types may not marshal a CNIVersion. Since the
+	// result version must match the config version, if the Result's version
+	// is empty, inject the config version.
+	if ver, ok := conf.RawPrevResult["CNIVersion"]; !ok || ver == "" {
+		conf.RawPrevResult["CNIVersion"] = conf.CNIVersion
+	}
+
 	resultBytes, err := json.Marshal(conf.RawPrevResult)
 	if err != nil {
-		return fmt.Errorf("could not serialize prevResult: %v", err)
+		return fmt.Errorf("could not serialize prevResult: %w", err)
 	}
 
 	conf.RawPrevResult = nil
-	conf.PrevResult, err = NewResult(conf.CNIVersion, resultBytes)
+	conf.PrevResult, err = create.Create(conf.CNIVersion, resultBytes)
 	if err != nil {
-		return fmt.Errorf("could not parse prevResult: %v", err)
+		return fmt.Errorf("could not parse prevResult: %w", err)
 	}
 
 	return nil