67 lines
1.4 KiB
Go
67 lines
1.4 KiB
Go
// Copyright (c) 2020 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"
|
|
"encoding/json"
|
|
"errors"
|
|
"flag"
|
|
"log"
|
|
"os"
|
|
|
|
"github.com/peterbourgon/ff/v2/ffcli"
|
|
"tailscale.com/net/interfaces"
|
|
"tailscale.com/wgengine/monitor"
|
|
)
|
|
|
|
var debugCmd = &ffcli.Command{
|
|
Name: "debug",
|
|
Exec: runDebug,
|
|
FlagSet: (func() *flag.FlagSet {
|
|
fs := flag.NewFlagSet("debug", flag.ExitOnError)
|
|
fs.BoolVar(&debugArgs.monitor, "monitor", false, "")
|
|
return fs
|
|
})(),
|
|
}
|
|
|
|
var debugArgs struct {
|
|
monitor bool
|
|
}
|
|
|
|
func runDebug(ctx context.Context, args []string) error {
|
|
if len(args) > 0 {
|
|
return errors.New("unknown arguments")
|
|
}
|
|
if debugArgs.monitor {
|
|
return runMonitor(ctx)
|
|
}
|
|
return errors.New("only --monitor is available at the moment")
|
|
}
|
|
|
|
func runMonitor(ctx context.Context) error {
|
|
dump := func() {
|
|
st, err := interfaces.GetState()
|
|
if err != nil {
|
|
log.Printf("error getting state: %v", err)
|
|
return
|
|
}
|
|
j, _ := json.MarshalIndent(st, "", " ")
|
|
os.Stderr.Write(j)
|
|
}
|
|
mon, err := monitor.New(log.Printf, func() {
|
|
log.Printf("Link monitor fired. State:")
|
|
dump()
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
log.Printf("Starting link change monitor; initial state:")
|
|
dump()
|
|
mon.Start()
|
|
log.Printf("Started link change monitor; waiting...")
|
|
select {}
|
|
}
|