mirror of
https://github.com/octoleo/syncthing.git
synced 2024-12-27 12:42:44 +00:00
40 lines
1010 B
Go
40 lines
1010 B
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 http://mozilla.org/MPL/2.0/.
|
|
|
|
package osutil
|
|
|
|
import (
|
|
"net"
|
|
"net/url"
|
|
"time"
|
|
)
|
|
|
|
// TCPPing returns the duration required to establish a TCP connection
|
|
// to the given host. ICMP packets require root priviledges, hence why we use
|
|
// tcp.
|
|
func TCPPing(address string) (time.Duration, error) {
|
|
dialer := net.Dialer{
|
|
Deadline: time.Now().Add(time.Second),
|
|
}
|
|
start := time.Now()
|
|
conn, err := dialer.Dial("tcp", address)
|
|
if conn != 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(addr string) (time.Duration, error) {
|
|
uri, err := url.Parse(addr)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
return TCPPing(uri.Host)
|
|
}
|