57 lines
1.8 KiB
Go
57 lines
1.8 KiB
Go
// Copyright 2013, Cong Ding. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// author: Cong Ding <dinggnu@gmail.com>
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package main
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import (
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"flag"
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"fmt"
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"github.com/ccding/go-stun/stun"
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)
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func main() {
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var serverAddr = flag.String("s", stun.DefaultServerAddr, "STUN server address")
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var v = flag.Bool("v", false, "verbose mode")
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var vv = flag.Bool("vv", false, "double verbose mode (includes -v)")
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var vvv = flag.Bool("vvv", false, "triple verbose mode (includes -v and -vv)")
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flag.Parse()
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// Creates a STUN client. NewClientWithConnection can also be used if
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// you want to handle the UDP listener by yourself.
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client := stun.NewClient()
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// The default addr (stun.DefaultServerAddr) will be used unless we
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// call SetServerAddr.
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client.SetServerAddr(*serverAddr)
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// Non verbose mode will be used by default unless we call
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// SetVerbose(true) or SetVVerbose(true).
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client.SetVerbose(*v || *vv || *vvv)
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client.SetVVerbose(*vv || *vvv)
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// Discover the NAT and return the result.
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nat, host, err := client.Discover()
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if err != nil {
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fmt.Println(err)
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return
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}
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fmt.Println("NAT Type:", nat)
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if host != nil {
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fmt.Println("External IP Family:", host.Family())
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fmt.Println("External IP:", host.IP())
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fmt.Println("External Port:", host.Port())
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}
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}
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