mirror of
https://github.com/tailscale/tailscale.git
synced 2024-12-05 07:55:36 +00:00
94aaec5c66
Making way for a future Probe struct to encapsulate per-probe state. Signed-off-by: David Anderson <danderson@tailscale.com>
31 lines
683 B
Go
31 lines
683 B
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 prober
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"net"
|
|
)
|
|
|
|
// TCP returns a Probe that healthchecks a TCP endpoint.
|
|
//
|
|
// The ProbeFunc reports whether it can successfully connect to addr.
|
|
func TCP(addr string) ProbeFunc {
|
|
return func(ctx context.Context) error {
|
|
return probeTCP(ctx, addr)
|
|
}
|
|
}
|
|
|
|
func probeTCP(ctx context.Context, addr string) error {
|
|
var d net.Dialer
|
|
conn, err := d.DialContext(ctx, "tcp", addr)
|
|
if err != nil {
|
|
return fmt.Errorf("dialing %q: %v", addr, err)
|
|
}
|
|
conn.Close()
|
|
return nil
|
|
}
|