mirror of
https://github.com/d0zingcat/gocryptotrader.git
synced 2026-05-18 23:16:49 +00:00
071f4f68a8
* WIP * Added check for time out of sync * merged upstream/master * added tests * Increased configuration options for NTPclient and test coverage * removed unneeded config save at end of ntp update * Added test for empty response to confirm it will loop * formatting correction * converted to pointer to allow for default allowance settings to be checked * added readme for NTP server * corrected some formatting * updated configtest negativedifference value * gofmt config_test.go for correct import order * corrected typo value in test * bugfix for windows newline and changes based on PR feedback * added minus sign to output * fixed negative number input * Fixed spelling mistakes and removed redundant test * reverted back to a positive number in the config instead of negative for allowednegativedifference * restructured code for cleaner output
60 lines
1.6 KiB
Go
60 lines
1.6 KiB
Go
package ntpclient
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import (
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"encoding/binary"
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"errors"
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"net"
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"time"
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log "github.com/thrasher-/gocryptotrader/logger"
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)
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type ntppacket struct {
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Settings uint8 // leap yr indicator, ver number, and mode
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Stratum uint8 // stratum of local clock
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Poll int8 // poll exponent
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Precision int8 // precision exponent
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RootDelay uint32 // root delay
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RootDispersion uint32 // root dispersion
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ReferenceID uint32 // reference id
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RefTimeSec uint32 // reference timestamp sec
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RefTimeFrac uint32 // reference timestamp fractional
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OrigTimeSec uint32 // origin time secs
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OrigTimeFrac uint32 // origin time fractional
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RxTimeSec uint32 // receive time secs
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RxTimeFrac uint32 // receive time frac
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TxTimeSec uint32 // transmit time secs
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TxTimeFrac uint32 // transmit time frac
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}
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// NTPClient create's a new NTPClient and returns local based on ntp servers provided timestamp
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func NTPClient(pool []string) (time.Time, error) {
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for i := range pool {
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con, err := net.Dial("udp", pool[i])
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if err != nil {
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log.Warnf("Unable to connect to hosts %v attempting next", pool[i])
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continue
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}
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defer con.Close()
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con.SetDeadline(time.Now().Add(5 * time.Second))
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req := &ntppacket{Settings: 0x1B}
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if err := binary.Write(con, binary.BigEndian, req); err != nil {
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continue
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}
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rsp := &ntppacket{}
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if err := binary.Read(con, binary.BigEndian, rsp); err != nil {
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continue
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}
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secs := float64(rsp.TxTimeSec) - 2208988800
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nanos := (int64(rsp.TxTimeFrac) * 1e9) >> 32
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return time.Unix(int64(secs), nanos), nil
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}
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return time.Unix(0, 0), errors.New("no valid time servers")
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}
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