mirror of
https://github.com/syncthing/syncthing.git
synced 2024-11-16 02:18:44 -07:00
4e4b9a872a
Also the call site where it shouldn't anyway be looking at the conn when the err is non-nil.
41 lines
1.1 KiB
Go
41 lines
1.1 KiB
Go
// Copyright (C) 2015 The Syncthing Authors.
|
|
//
|
|
// This Source Code Form is subject to the terms of the Mozilla Public
|
|
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
|
|
// You can obtain one at https://mozilla.org/MPL/2.0/.
|
|
|
|
package osutil
|
|
|
|
import (
|
|
"context"
|
|
"net/url"
|
|
"time"
|
|
|
|
"github.com/syncthing/syncthing/lib/dialer"
|
|
)
|
|
|
|
// TCPPing returns the duration required to establish a TCP connection
|
|
// to the given host. ICMP packets require root privileges, hence why we use
|
|
// tcp.
|
|
func TCPPing(ctx context.Context, address string) (time.Duration, error) {
|
|
start := time.Now()
|
|
ctx, cancel := context.WithTimeout(ctx, time.Second)
|
|
defer cancel()
|
|
conn, err := dialer.DialContext(ctx, "tcp", address)
|
|
if err == nil {
|
|
conn.Close()
|
|
}
|
|
return time.Since(start), err
|
|
}
|
|
|
|
// GetLatencyForURL parses the given URL, tries opening a TCP connection to it
|
|
// and returns the time it took to establish the connection.
|
|
func GetLatencyForURL(ctx context.Context, addr string) (time.Duration, error) {
|
|
uri, err := url.Parse(addr)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
return TCPPing(ctx, uri.Host)
|
|
}
|