74 lines
1.2 KiB
Go
74 lines
1.2 KiB
Go
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package main
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import (
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"bufio"
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"fmt"
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"net"
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"slices"
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"time"
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)
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const (
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maxPacksize = 1400
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msgCtrlToken = 0x04
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)
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func ctrlToken(myToken []byte) []byte {
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header := []byte{0x04, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff}
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ctrlToken := append([]byte{0x05}, myToken...)
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zeros := []byte{512: 0}
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data := slices.Concat(header, ctrlToken, zeros)
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return data
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}
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func pumpNetwork(ch chan []byte) {
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packet := make([]byte, maxPacksize)
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conn, err := net.Dial("udp", "127.0.0.1:8303")
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if err != nil {
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fmt.Printf("Some error %v", err)
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return
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}
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// myToken := []byte{0xfe, 0xed, 0xba, 0xbe}
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myToken := []byte{0x01, 0x02, 0x03, 0x04}
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conn.Write(ctrlToken(myToken))
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for {
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_, err = bufio.NewReader(conn).Read(packet)
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if err == nil {
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ch <- packet
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} else {
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fmt.Printf("Some error %v\n", err)
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break
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}
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}
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conn.Close()
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}
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func onMessage(data []byte) {
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if data[0] == msgCtrlToken {
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serverToken := data[8:12]
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fmt.Printf("got token %v\n", serverToken)
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} else {
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fmt.Println("unknown message")
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}
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}
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func main() {
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ch := make(chan []byte, maxPacksize)
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go pumpNetwork(ch)
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for {
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time.Sleep(10_000_000)
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select {
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case msg := <-ch:
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onMessage(msg)
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default:
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// do nothing
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}
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}
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}
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