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@ -38,6 +38,14 @@ Example usage:
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panic(fmt.Errorf("failed to parse command flag 'secret': %w", err))
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}
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maxJitter, err := cmd.Flags().GetInt("maxjitter")
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if err != nil {
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panic(fmt.Errorf("failed to parse command flag 'maxjitter': %w", err))
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}
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if maxJitter < 1 || maxJitter > 1500 {
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panic(fmt.Errorf("maxjitter must be value between 1 and 1500"))
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}
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secretBytes, err := os.ReadFile(secretFilePath)
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if err != nil {
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log.Fatalf("failed to read file 'hyp.secret': %v", err)
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@ -50,12 +58,12 @@ Example usage:
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}
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// Transmit
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fmt.Println("Transmitting knock sequence:", ports)
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for _, port := range ports {
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fmt.Printf("knock | %s:%d\n", args[0], port)
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conn, _ := net.Dial("udp", fmt.Sprintf("%s:%d", args[0], port))
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conn.Write([]byte{0})
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conn.Close()
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time.Sleep(time.Millisecond * 200) // TBD: Make this configurable with flag (maxJitter)
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time.Sleep(time.Millisecond * time.Duration(maxJitter)) // TBD: Make this configurable with flag (maxJitter)
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}
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},
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}
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@ -64,4 +72,5 @@ func init() {
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rootCmd.AddCommand(knockCmd)
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knockCmd.PersistentFlags().String("secret", "hyp.secret", "Path to the file containing the hyp secret.")
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knockCmd.PersistentFlags().Int("maxjitter", 200, "Specifies the time in milliseconds between knock sequence transmissions.")
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}
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