feat: support sudp proxy (#1730)

server/proxy/proxy.go

@@ -219,6 +219,11 @@ func NewProxy(ctx context.Context, userInfo plugin.UserInfo, rc *controller.Reso
 			BaseProxy: &basePxy,
 			cfg:       cfg,
 		}
+	case *config.SudpProxyConf:
+		pxy = &SudpProxy{
+			BaseProxy: &basePxy,
+			cfg:       cfg,
+		}
 	default:
 		return pxy, fmt.Errorf("proxy type not support")
 	}

server/proxy/sudp.go

@@ -0,0 +1,48 @@
+// 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 (
+	"github.com/fatedier/frp/models/config"
+)
+
+type SudpProxy struct {
+	*BaseProxy
+	cfg *config.SudpProxyConf
+}
+
+func (pxy *SudpProxy) Run() (remoteAddr string, err error) {
+	xl := pxy.xl
+
+	listener, errRet := pxy.rc.VisitorManager.Listen(pxy.GetName(), pxy.cfg.Sk)
+	if errRet != nil {
+		err = errRet
+		return
+	}
+	pxy.listeners = append(pxy.listeners, listener)
+	xl.Info("sudp proxy custom listen success")
+
+	pxy.startListenHandler(pxy, HandleUserTcpConnection)
+	return
+}
+
+func (pxy *SudpProxy) GetConf() config.ProxyConf {
+	return pxy.cfg
+}
+
+func (pxy *SudpProxy) Close() {
+	pxy.BaseProxy.Close()
+	pxy.rc.VisitorManager.CloseListener(pxy.GetName())
+}