2023-05-05 00:15:03 +00:00
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package cmd
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// this file contains xbee utilities.
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// we can do network discovery and netcat-like things.
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import (
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2023-05-07 05:00:35 +00:00
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"fmt"
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"io"
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"os"
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"github.com/kschamplin/gotelem/xbee"
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"github.com/urfave/cli/v2"
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"go.bug.st/serial"
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"golang.org/x/exp/slog"
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)
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var xbeeCmd = &cli.Command{
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Name: "xbee",
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Aliases: []string{"x"},
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Usage: "Utilities for XBee",
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Description: `
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Allows for testing and debugging XBee networks and devices.
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The "device" parameter is not optional, and can be any of the following formats:
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tcp://192.168.4.5:8430
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COM1
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/dev/ttyUSB0:115200
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For serial devices (COM1 and /dev/ttyUSB0), you can specify the baud rate
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using a ':'. If excluded the baud rate will default to 9600. Note that
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if using the native USB of the XLR Pro, the baud rate setting has no effect.
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TCP/UDP connections require a port and will fail if one is not provided.
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`,
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Flags: []cli.Flag{
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&cli.StringFlag{
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Name: "device",
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Aliases: []string{"d"},
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Usage: "The XBee to connect to",
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Required: true,
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EnvVars: []string{"XBEE_DEVICE"},
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},
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},
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Subcommands: []*cli.Command{
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{
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Name: "info",
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Usage: "get information about an xbee device",
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Action: xbeeInfo,
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HideHelpCommand: true,
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},
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{
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Name: "netcat",
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Aliases: []string{"nc"},
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ArgsUsage: "[addr]",
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Usage: "send data from stdio over the xbee",
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Description: `
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netcat emulates the nc command. It reads data from stdin and transmits it to
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[addr] on the XBee network. If [addr] is FFFF or not present, it will broadcast
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the data to all listening devices. Data received from the network will be
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writtend to stdout.
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`,
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Action: netcat,
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HideHelpCommand: true,
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},
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},
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}
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func xbeeInfo(ctx *cli.Context) error {
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logger := slog.New(slog.NewTextHandler(os.Stderr))
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xb, err := xbee.NewSerialXBee("/dev/ttyACM0", &serial.Mode{}, logger)
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if err != nil {
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return cli.Exit(err, 1)
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}
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b, err := xb.ATCommand([2]rune{'I', 'D'}, nil, false)
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if err != nil {
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return cli.Exit(err, 1)
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}
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fmt.Println(b)
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return nil
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}
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func netcat(ctx *cli.Context) error {
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if ctx.Args().Len() < 1 {
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cli.ShowSubcommandHelp(ctx)
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return cli.Exit("missing [addr] argument", 1)
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}
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// basically create two pipes.
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logger := slog.New(slog.NewTextHandler(os.Stderr))
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xb, _ := xbee.NewSerialXBee("/dev/ttyACM0", &serial.Mode{}, logger)
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sent := make(chan int64)
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streamCopy := func(r io.ReadCloser, w io.WriteCloser) {
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defer r.Close()
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defer w.Close()
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n, err := io.Copy(w, r)
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if err != nil {
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logger.Warn("got error copying", "err", err)
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}
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sent <- n
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}
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go streamCopy(os.Stdin, xb)
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go streamCopy(xb, os.Stdout)
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<-sent
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return nil
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}
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