func main() {
paths, err := filepath.Glob("test-files/*")
if err != nil {
panic(err)
}
for _, path := range paths {
data, err := ioutil.ReadFile(path)
if err != nil {
panic(err)
}
packet, err := stun.ParsePacket(data, []byte{})
fmt.Println(packet, err)
}
pkt, err := stun.BindRequest([]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2}, []byte{1, 2, 3}, true)
packet, err := stun.ParsePacket(pkt, []byte{1, 2, 3})
fmt.Println(packet, err)
pkt, err = stun.BindResponse([]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2}, &net.UDPAddr{net.IP([]byte{192, 168, 1, 42}), 4242}, []byte{1, 2, 3}, true)
packet, err = stun.ParsePacket(pkt, []byte{1, 2, 3})
fmt.Println(packet, err)
}
func main() {
flag.Parse()
serverAddr, err := net.ResolveUDPAddr("udp", *server)
if err != nil {
fmt.Println("Couldn't resolve", *server)
os.Exit(1)
}
tid := []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0xa, 0xb, 0xc}
request, err := stun.BindRequest(tid, nil, true)
if err != nil {
fmt.Println("Failed to build STUN request:", err)
os.Exit(1)
}
sock, err := net.ListenUDP("udp", &net.UDPAddr{Port: *sourcePort})
if err != nil {
fmt.Println("Couldn't listen on UDP port", *sourcePort)
os.Exit(1)
}
if err := sock.SetTimeout(2e9); err != nil {
fmt.Println("Couldn't set the socket timeout:", err)
os.Exit(1)
}
n, err := sock.WriteTo(request, serverAddr)
if err != nil {
fmt.Println("Couldn't send STUN request:", err)
os.Exit(1)
}
if n < len(request) {
fmt.Println("Short write")
os.Exit(1)
}
buf := make([]byte, 1024)
n, _, err = sock.ReadFromUDP(buf)
if err != nil {
fmt.Println("Error reading STUN response:", err)
os.Exit(1)
}
sock.Close()
packet, err := stun.ParsePacket(buf[:n], nil)
if err != nil {
fmt.Println("Failed to parse STUN packet:", err)
os.Exit(1)
}
if packet.Error != nil {
fmt.Println("STUN server returned an error:", packet.Error)
os.Exit(1)
}
if packet.Addr == nil {
fmt.Println("STUN server didn't provide a reflexive address")
os.Exit(1)
}
fmt.Printf("According to STUN server %s, port %d maps to %s on your NAT\n",
*server, *sourcePort, packet.Addr)
}