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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.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package prober
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import (
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"context"
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"fmt"
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"net"
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)
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// TCP returns a Probe that healthchecks a TCP endpoint.
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//
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// The ProbeFunc reports whether it can successfully connect to addr.
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func TCP(addr string) ProbeFunc {
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return func(ctx context.Context) error {
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return probeTCP(ctx, addr)
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}
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}
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func probeTCP(ctx context.Context, addr string) error {
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var d net.Dialer
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conn, err := d.DialContext(ctx, "tcp", addr)
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if err != nil {
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return fmt.Errorf("dialing %q: %v", addr, err)
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}
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conn.Close()
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return nil
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}
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