frp/pkg/plugin/client/unix_domain_socket.go

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// Copyright 2017 fatedier, fatedier@gmail.com
//
// 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 plugin
import (
"fmt"
"io"
"net"
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libio "github.com/fatedier/golib/io"
)
const PluginUnixDomainSocket = "unix_domain_socket"
func init() {
Register(PluginUnixDomainSocket, NewUnixDomainSocketPlugin)
}
type UnixDomainSocketPlugin struct {
UnixAddr *net.UnixAddr
}
func NewUnixDomainSocketPlugin(params map[string]string) (p Plugin, err error) {
unixPath, ok := params["plugin_unix_path"]
if !ok {
err = fmt.Errorf("plugin_unix_path not found")
return
}
unixAddr, errRet := net.ResolveUnixAddr("unix", unixPath)
if errRet != nil {
err = errRet
return
}
p = &UnixDomainSocketPlugin{
UnixAddr: unixAddr,
}
return
}
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func (uds *UnixDomainSocketPlugin) Handle(conn io.ReadWriteCloser, _ net.Conn, extraBufToLocal []byte) {
localConn, err := net.DialUnix("unix", nil, uds.UnixAddr)
if err != nil {
return
}
if len(extraBufToLocal) > 0 {
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if _, err := localConn.Write(extraBufToLocal); err != nil {
return
}
}
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libio.Join(localConn, conn)
}
func (uds *UnixDomainSocketPlugin) Name() string {
return PluginUnixDomainSocket
}
func (uds *UnixDomainSocketPlugin) Close() error {
return nil
}