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// SPDX-License-Identifier: GPL-3.0-or-later
package chrony
import (
"fmt"
"net"
"time"
"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: &connWithTimeout{
Conn: conn,
timeout: c.Timeout.Duration(),
}},
}
return client, nil
}
type connWithTimeout struct {
net.Conn
timeout time.Duration
}
func (c *connWithTimeout) Read(p []byte) (n int, err error) {
if err := c.Conn.SetReadDeadline(c.deadline()); err != nil {
return 0, err
}
return c.Conn.Read(p)
}
func (c *connWithTimeout) Write(p []byte) (n int, err error) {
if err := c.Conn.SetWriteDeadline(c.deadline()); err != nil {
return 0, err
}
return c.Conn.Write(p)
}
func (c *connWithTimeout) deadline() time.Time {
return time.Now().Add(c.timeout)
}
type simpleClient struct {
conn net.Conn
client *chrony.Client
}
func (sc *simpleClient) Tracking() (*chrony.ReplyTracking, error) {
req := chrony.NewTrackingPacket()
reply, err := sc.client.Communicate(req)
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) {
req := chrony.NewActivityPacket()
reply, err := sc.client.Communicate(req)
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
}
type serverStats struct {
v1 *chrony.ServerStats
v2 *chrony.ServerStats2
v3 *chrony.ServerStats3
v4 *chrony.ServerStats4
}
func (sc *simpleClient) ServerStats() (*serverStats, error) {
req := chrony.NewServerStatsPacket()
reply, err := sc.client.Communicate(req)
if err != nil {
return nil, err
}
var stats serverStats
switch v := reply.(type) {
case *chrony.ReplyServerStats:
stats.v1 = &chrony.ServerStats{
NTPHits: v.NTPHits,
CMDHits: v.CMDHits,
NTPDrops: v.NTPDrops,
CMDDrops: v.CMDDrops,
LogDrops: v.LogDrops,
}
case *chrony.ReplyServerStats2:
stats.v2 = &chrony.ServerStats2{
NTPHits: v.NTPHits,
NKEHits: v.NKEHits,
CMDHits: v.CMDHits,
NTPDrops: v.NTPDrops,
NKEDrops: v.NKEDrops,
CMDDrops: v.CMDDrops,
LogDrops: v.LogDrops,
NTPAuthHits: v.NTPAuthHits,
}
case *chrony.ReplyServerStats3:
stats.v3 = &chrony.ServerStats3{
NTPHits: v.NTPHits,
NKEHits: v.NKEHits,
CMDHits: v.CMDHits,
NTPDrops: v.NTPDrops,
NKEDrops: v.NKEDrops,
CMDDrops: v.CMDDrops,
LogDrops: v.LogDrops,
NTPAuthHits: v.NTPAuthHits,
NTPInterleavedHits: v.NTPInterleavedHits,
NTPTimestamps: v.NTPTimestamps,
NTPSpanSeconds: v.NTPSpanSeconds,
}
case *chrony.ReplyServerStats4:
stats.v4 = &chrony.ServerStats4{
NTPHits: v.NTPHits,
NKEHits: v.NKEHits,
CMDHits: v.CMDHits,
NTPDrops: v.NTPDrops,
NKEDrops: v.NKEDrops,
CMDDrops: v.CMDDrops,
LogDrops: v.LogDrops,
NTPAuthHits: v.NTPAuthHits,
NTPInterleavedHits: v.NTPInterleavedHits,
NTPTimestamps: v.NTPTimestamps,
NTPSpanSeconds: v.NTPSpanSeconds,
NTPDaemonRxtimestamps: v.NTPDaemonRxtimestamps,
NTPDaemonTxtimestamps: v.NTPDaemonTxtimestamps,
NTPKernelRxtimestamps: v.NTPKernelRxtimestamps,
NTPKernelTxtimestamps: v.NTPKernelTxtimestamps,
NTPHwRxTimestamps: v.NTPHwRxTimestamps,
NTPHwTxTimestamps: v.NTPHwTxTimestamps,
}
default:
return nil, fmt.Errorf("unexpected reply type, want=ReplyServerStats, got=%T", reply)
}
return &stats, nil
}
func (sc *simpleClient) Close() {
if sc.conn != nil {
_ = sc.conn.Close()
sc.conn = nil
}
}
|
