1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
// SPDX-License-Identifier: GPL-3.0-or-later
package chrony
import (
"fmt"
"net"
"github.com/facebook/time/ntp/chrony"
)
func newChronyClient(c Config) (chronyClient, error) {
conn, err := net.DialTimeout("udp", c.Address, c.Timeout.Duration())
if err != nil {
return nil, err
}
client := &simpleClient{
conn: conn,
client: &chrony.Client{Connection: conn},
}
return client, nil
}
type simpleClient struct {
conn net.Conn
client *chrony.Client
}
func (sc *simpleClient) Tracking() (*chrony.ReplyTracking, error) {
reply, err := sc.client.Communicate(chrony.NewTrackingPacket())
if err != nil {
return nil, err
}
tracking, ok := reply.(*chrony.ReplyTracking)
if !ok {
return nil, fmt.Errorf("unexpected reply type, want=%T, got=%T", &chrony.ReplyTracking{}, reply)
}
return tracking, nil
}
func (sc *simpleClient) Activity() (*chrony.ReplyActivity, error) {
reply, err := sc.client.Communicate(chrony.NewActivityPacket())
if err != nil {
return nil, err
}
activity, ok := reply.(*chrony.ReplyActivity)
if !ok {
return nil, fmt.Errorf("unexpected reply type, want=%T, got=%T", &chrony.ReplyActivity{}, reply)
}
return activity, nil
}
func (sc *simpleClient) Close() {
if sc.conn != nil {
_ = sc.conn.Close()
sc.conn = nil
}
}
|