mirror of
https://github.com/tailscale/tailscale.git
synced 2025-04-07 16:54:37 +00:00
87ba528ae0
Remove all global variables, and clean up tsnet and cmd/tailscale's usage. This is in prep for using this package for the web API too (it has the best package name). RELNOTE=tailscale.com/client/tailscale package refactored w/ LocalClient type Change-Id: Iba9f162fff0c520a09d1d4bd8862f5c5acc9d7cd Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
63 lines
1.3 KiB
Go
63 lines
1.3 KiB
Go
// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package cli
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"strconv"
|
|
|
|
"github.com/peterbourgon/ff/v3/ffcli"
|
|
)
|
|
|
|
var ncCmd = &ffcli.Command{
|
|
Name: "nc",
|
|
ShortUsage: "nc <hostname-or-IP> <port>",
|
|
ShortHelp: "Connect to a port on a host, connected to stdin/stdout",
|
|
Exec: runNC,
|
|
}
|
|
|
|
func runNC(ctx context.Context, args []string) error {
|
|
st, err := localClient.Status(ctx)
|
|
if err != nil {
|
|
return fixTailscaledConnectError(err)
|
|
}
|
|
description, ok := isRunningOrStarting(st)
|
|
if !ok {
|
|
printf("%s\n", description)
|
|
os.Exit(1)
|
|
}
|
|
|
|
if len(args) != 2 {
|
|
return errors.New("usage: nc <hostname-or-IP> <port>")
|
|
}
|
|
|
|
hostOrIP, portStr := args[0], args[1]
|
|
port, err := strconv.ParseUint(portStr, 10, 16)
|
|
if err != nil {
|
|
return fmt.Errorf("invalid port number %q", portStr)
|
|
}
|
|
|
|
// TODO(bradfitz): also add UDP too, via flag?
|
|
c, err := localClient.DialTCP(ctx, hostOrIP, uint16(port))
|
|
if err != nil {
|
|
return fmt.Errorf("Dial(%q, %v): %w", hostOrIP, port, err)
|
|
}
|
|
defer c.Close()
|
|
errc := make(chan error, 1)
|
|
go func() {
|
|
_, err := io.Copy(os.Stdout, c)
|
|
errc <- err
|
|
}()
|
|
go func() {
|
|
_, err := io.Copy(c, os.Stdin)
|
|
errc <- err
|
|
}()
|
|
return <-errc
|
|
}
|