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ntp.go
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ntp.go
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/*
* Copyright (c) 2024 Yunshan Networks
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package synchronize
import (
"net"
"strconv"
"time"
api "github.com/deepflowio/deepflow/message/trident"
context "golang.org/x/net/context"
"github.com/deepflowio/deepflow/server/controller/trisolaris"
)
type NTPEvent struct{}
func NewNTPEvent() *NTPEvent {
return &NTPEvent{}
}
var EmptyNtpResponse = &api.NtpResponse{}
func (e *NTPEvent) Query(ctx context.Context, in *api.NtpRequest) (*api.NtpResponse, error) {
log.Infof("request ntp proxcy from ip: %s", in.GetCtrlIp())
config := trisolaris.GetConfig()
addr := net.JoinHostPort(config.Chrony.Host, strconv.Itoa(int(config.Chrony.Port)))
udpAddr, err := net.ResolveUDPAddr("udp", addr)
if err != nil {
log.Error(err)
return EmptyNtpResponse, nil
}
conn, err := net.DialUDP("udp", nil, udpAddr)
if err != nil {
log.Error(err)
return EmptyNtpResponse, nil
}
defer conn.Close()
if err = conn.SetDeadline(time.Now().Add(time.Duration(config.Chrony.Timeout) * time.Second)); err != nil {
log.Error(err)
return EmptyNtpResponse, nil
}
request := in.GetRequest()
if request == nil {
log.Errorf("ntp query no request data from ip: %s", in.GetCtrlIp())
return EmptyNtpResponse, nil
}
_, err = conn.Write(request)
if err != nil {
log.Error("send ntp request failed", err)
return EmptyNtpResponse, nil
}
data := make([]byte, 4096)
n, remoterAddr, err := conn.ReadFromUDP(data)
if err != nil {
log.Error("receive ntp response failed", remoterAddr, err)
return EmptyNtpResponse, nil
}
log.Debug("receive ntp response", remoterAddr, n)
return &api.NtpResponse{
Response: data[:n],
}, nil
}