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synced 2024-12-23 02:26:49 -05:00
implement ss2022 client timestamp check as per spec
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d8e32f17bd
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@ -73,6 +73,15 @@ func (c *ClientUDPSession) KeepReading() {
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newError("unable to decode udp response").Base(err).WriteToLog()
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newError("unable to decode udp response").Base(err).WriteToLog()
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continue
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continue
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}
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}
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{
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timeDifference := int64(udpResp.TimeStamp) - time.Now().Unix()
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if timeDifference < -30 || timeDifference > 30 {
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newError("udp packet timestamp difference too large, packet discarded").WriteToLog()
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continue
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}
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}
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c.locker.Lock()
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c.locker.Lock()
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session, ok := c.sessionMap[string(udpResp.ClientSessionID[:])]
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session, ok := c.sessionMap[string(udpResp.ClientSessionID[:])]
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if ok {
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if ok {
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@ -203,7 +203,7 @@ func (t *TCPRequest) DecodeTCPResponseHeader(effectivePsk []byte, In io.Reader)
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return newError("unexpected TCP header type")
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return newError("unexpected TCP header type")
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}
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}
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timeDifference := int64(fixedLengthHeader.Timestamp) - time.Now().Unix()
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timeDifference := int64(fixedLengthHeader.Timestamp) - time.Now().Unix()
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if timeDifference < -60 || timeDifference > 60 {
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if timeDifference < -30 || timeDifference > 30 {
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return newError("timestamp is too far away")
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return newError("timestamp is too far away")
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}
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}
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