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vender/github.com/ccding/go-stun/main.go

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+// Copyright 2013, Cong Ding. All rights reserved.
+//
+// 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.
+//
+// author: Cong Ding <dinggnu@gmail.com>
+
+package main
+
+import (
+	"flag"
+	"fmt"
+
+	"github.com/ccding/go-stun/stun"
+)
+
+func main() {
+	var serverAddr = flag.String("s", stun.DefaultServerAddr, "STUN server address")
+	var v = flag.Bool("v", false, "verbose mode")
+	var vv = flag.Bool("vv", false, "double verbose mode (includes -v)")
+	var vvv = flag.Bool("vvv", false, "triple verbose mode (includes -v and -vv)")
+	flag.Parse()
+
+	// Creates a STUN client. NewClientWithConnection can also be used if
+	// you want to handle the UDP listener by yourself.
+	client := stun.NewClient()
+	// The default addr (stun.DefaultServerAddr) will be used unless we
+	// call SetServerAddr.
+	client.SetServerAddr(*serverAddr)
+	// Non verbose mode will be used by default unless we call
+	// SetVerbose(true) or SetVVerbose(true).
+	client.SetVerbose(*v || *vv || *vvv)
+	client.SetVVerbose(*vv || *vvv)
+	// Discover the NAT and return the result.
+	nat, host, err := client.Discover()
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	fmt.Println("NAT Type:", nat)
+	if host != nil {
+		fmt.Println("External IP Family:", host.Family())
+		fmt.Println("External IP:", host.IP())
+		fmt.Println("External Port:", host.Port())
+	}
+}