mirror of
https://github.com/tailscale/tailscale.git
synced 2025-04-28 19:50:59 +00:00
71029cea2d
This updates all source files to use a new standard header for copyright and license declaration. Notably, copyright no longer includes a date, and we now use the standard SPDX-License-Identifier header. This commit was done almost entirely mechanically with perl, and then some minimal manual fixes. Updates #6865 Signed-off-by: Will Norris <will@tailscale.com>
62 lines
1.2 KiB
Go
62 lines
1.2 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
|
|
// SPDX-License-Identifier: BSD-3-Clause
|
|
|
|
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
|
|
}
|