plugin: add socks5 plugin

models/plugin/socks5.go

@@ -0,0 +1,65 @@
+// 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 (
+	"io"
+	"io/ioutil"
+	"log"
+
+	frpNet "github.com/fatedier/frp/utils/net"
+
+	gosocks5 "github.com/armon/go-socks5"
+)
+
+const PluginSocks5 = "socks5"
+
+func init() {
+	Register(PluginSocks5, NewSocks5Plugin)
+}
+
+type Socks5Plugin struct {
+	Server *gosocks5.Server
+}
+
+func NewSocks5Plugin(params map[string]string) (p Plugin, err error) {
+	sp := &Socks5Plugin{}
+	sp.Server, err = gosocks5.New(&gosocks5.Config{
+		Logger: log.New(ioutil.Discard, "", log.LstdFlags),
+	})
+	p = sp
+	return
+}
+
+func (sp *Socks5Plugin) Handle(conn io.ReadWriteCloser) {
+	defer conn.Close()
+
+	var wrapConn frpNet.Conn
+	if realConn, ok := conn.(frpNet.Conn); ok {
+		wrapConn = realConn
+	} else {
+		wrapConn = frpNet.WrapReadWriteCloserToConn(conn)
+	}
+
+	sp.Server.ServeConn(wrapConn)
+}
+
+func (sp *Socks5Plugin) Name() string {
+	return PluginSocks5
+}
+
+func (sp *Socks5Plugin) Close() error {
+	return nil
+}