server: adjust code structure

server/proxy/xtcp.go

@@ -0,0 +1,73 @@
+// Copyright 2019 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 proxy
+
+import (
+	"fmt"
+
+	"github.com/fatedier/frp/models/config"
+	"github.com/fatedier/frp/models/msg"
+
+	"github.com/fatedier/golib/errors"
+)
+
+type XtcpProxy struct {
+	BaseProxy
+	cfg *config.XtcpProxyConf
+
+	closeCh chan struct{}
+}
+
+func (pxy *XtcpProxy) Run() (remoteAddr string, err error) {
+	if pxy.rc.NatHoleController == nil {
+		pxy.Error("udp port for xtcp is not specified.")
+		err = fmt.Errorf("xtcp is not supported in frps")
+		return
+	}
+	sidCh := pxy.rc.NatHoleController.ListenClient(pxy.GetName(), pxy.cfg.Sk)
+	go func() {
+		for {
+			select {
+			case <-pxy.closeCh:
+				break
+			case sid := <-sidCh:
+				workConn, errRet := pxy.GetWorkConnFromPool()
+				if errRet != nil {
+					continue
+				}
+				m := &msg.NatHoleSid{
+					Sid: sid,
+				}
+				errRet = msg.WriteMsg(workConn, m)
+				if errRet != nil {
+					pxy.Warn("write nat hole sid package error, %v", errRet)
+				}
+			}
+		}
+	}()
+	return
+}
+
+func (pxy *XtcpProxy) GetConf() config.ProxyConf {
+	return pxy.cfg
+}
+
+func (pxy *XtcpProxy) Close() {
+	pxy.BaseProxy.Close()
+	pxy.rc.NatHoleController.CloseClient(pxy.GetName())
+	errors.PanicToError(func() {
+		close(pxy.closeCh)
+	})
+}