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// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
// SPDX-License-Identifier: MIT
// Package main implements a CLI tool which acts as a STUN client
package main
import (
"flag"
"fmt"
"log"
"os"
"github.com/pion/stun"
)
func main() {
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage of %s:\n", os.Args[0])
fmt.Fprintln(os.Stderr, os.Args[0], "stun:stun.l.google.com:19302")
}
flag.Parse()
uriStr := flag.Arg(0)
if uriStr == "" {
uriStr = "stun:stun.l.google.com:19302"
}
uri, err := stun.ParseURI(uriStr)
if err != nil {
log.Fatalf("Invalid URI '%s': %s", uriStr, err)
}
// we only try the first address, so restrict ourselves to IPv4
c, err := stun.DialURI(uri, &stun.DialConfig{})
if err != nil {
log.Fatalf("Failed to dial: %s", err)
}
if err = c.Do(stun.MustBuild(stun.TransactionID, stun.BindingRequest), func(res stun.Event) {
if res.Error != nil {
log.Fatalf("Failed STUN transaction: %s", res.Error)
}
var xorAddr stun.XORMappedAddress
if getErr := xorAddr.GetFrom(res.Message); getErr != nil {
log.Fatalf("Failed to get XOR-MAPPED-ADDRESS: %s", getErr)
}
log.Print(xorAddr)
}); err != nil {
log.Fatal("Do:", err)
}
if err := c.Close(); err != nil {
log.Fatalf("Failed to close connection: %s", err)
}
}
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