81 lines
2.5 KiB
Go
81 lines
2.5 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 invoke
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import (
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"context"
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"os"
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"path/filepath"
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"github.com/containernetworking/cni/pkg/types"
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)
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func delegateCommon(delegatePlugin string, exec Exec) (string, Exec, error) {
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if exec == nil {
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exec = defaultExec
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}
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paths := filepath.SplitList(os.Getenv("CNI_PATH"))
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pluginPath, err := exec.FindInPath(delegatePlugin, paths)
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if err != nil {
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return "", nil, err
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}
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return pluginPath, exec, nil
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}
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// DelegateAdd calls the given delegate plugin with the CNI ADD action and
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// JSON configuration
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func DelegateAdd(ctx context.Context, delegatePlugin string, netconf []byte, exec Exec) (types.Result, error) {
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pluginPath, realExec, err := delegateCommon(delegatePlugin, exec)
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if err != nil {
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return nil, err
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}
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// DelegateAdd will override the original "CNI_COMMAND" env from process with ADD
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return ExecPluginWithResult(ctx, pluginPath, netconf, delegateArgs("ADD"), realExec)
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}
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// DelegateCheck calls the given delegate plugin with the CNI CHECK action and
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// JSON configuration
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func DelegateCheck(ctx context.Context, delegatePlugin string, netconf []byte, exec Exec) error {
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pluginPath, realExec, err := delegateCommon(delegatePlugin, exec)
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if err != nil {
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return err
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}
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// DelegateCheck will override the original CNI_COMMAND env from process with CHECK
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return ExecPluginWithoutResult(ctx, pluginPath, netconf, delegateArgs("CHECK"), realExec)
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}
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// DelegateDel calls the given delegate plugin with the CNI DEL action and
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// JSON configuration
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func DelegateDel(ctx context.Context, delegatePlugin string, netconf []byte, exec Exec) error {
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pluginPath, realExec, err := delegateCommon(delegatePlugin, exec)
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if err != nil {
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return err
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}
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// DelegateDel will override the original CNI_COMMAND env from process with DEL
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return ExecPluginWithoutResult(ctx, pluginPath, netconf, delegateArgs("DEL"), realExec)
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}
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// return CNIArgs used by delegation
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func delegateArgs(action string) *DelegateArgs {
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return &DelegateArgs{
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Command: action,
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}
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}
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