mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-09-20 02:27:50 +00:00
113 lines
2.6 KiB
Go
113 lines
2.6 KiB
Go
package ntp
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import (
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"context"
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"os"
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"time"
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"github.com/sagernet/sing-box/adapter"
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"github.com/sagernet/sing-box/common/dialer"
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"github.com/sagernet/sing-box/common/settings"
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C "github.com/sagernet/sing-box/constant"
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"github.com/sagernet/sing-box/option"
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"github.com/sagernet/sing/common"
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E "github.com/sagernet/sing/common/exceptions"
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"github.com/sagernet/sing/common/logger"
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M "github.com/sagernet/sing/common/metadata"
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N "github.com/sagernet/sing/common/network"
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"github.com/sagernet/sing/common/ntp"
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)
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var _ ntp.TimeService = (*Service)(nil)
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type Service struct {
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ctx context.Context
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cancel common.ContextCancelCauseFunc
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server M.Socksaddr
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writeToSystem bool
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dialer N.Dialer
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logger logger.Logger
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ticker *time.Ticker
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clockOffset time.Duration
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}
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func NewService(ctx context.Context, router adapter.Router, logger logger.Logger, options option.NTPOptions) (*Service, error) {
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ctx, cancel := common.ContextWithCancelCause(ctx)
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server := options.ServerOptions.Build()
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if server.Port == 0 {
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server.Port = 123
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}
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var interval time.Duration
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if options.Interval > 0 {
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interval = time.Duration(options.Interval)
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} else {
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interval = 30 * time.Minute
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}
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outboundDialer, err := dialer.New(router, options.DialerOptions)
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if err != nil {
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return nil, err
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}
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return &Service{
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ctx: ctx,
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cancel: cancel,
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server: server,
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writeToSystem: options.WriteToSystem,
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dialer: outboundDialer,
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logger: logger,
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ticker: time.NewTicker(interval),
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}, nil
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}
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func (s *Service) Start() error {
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err := s.update()
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if err != nil {
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return E.Cause(err, "initialize time")
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}
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s.logger.Info("updated time: ", s.TimeFunc()().Local().Format(C.TimeLayout))
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go s.loopUpdate()
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return nil
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}
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func (s *Service) Close() error {
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s.ticker.Stop()
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s.cancel(os.ErrClosed)
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return nil
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}
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func (s *Service) TimeFunc() func() time.Time {
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return func() time.Time {
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return time.Now().Add(s.clockOffset)
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}
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}
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func (s *Service) loopUpdate() {
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for {
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select {
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case <-s.ctx.Done():
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return
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case <-s.ticker.C:
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}
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err := s.update()
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if err == nil {
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s.logger.Debug("updated time: ", s.TimeFunc()().Local().Format(C.TimeLayout))
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} else {
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s.logger.Warn("update time: ", err)
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}
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}
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}
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func (s *Service) update() error {
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response, err := ntp.Exchange(s.ctx, s.dialer, s.server)
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if err != nil {
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return err
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}
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s.clockOffset = response.ClockOffset
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if s.writeToSystem {
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writeErr := settings.SetSystemTime(s.TimeFunc()())
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if writeErr != nil {
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s.logger.Warn("write time to system: ", writeErr)
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}
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}
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return nil
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}
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