[kadet.89]

Thanks for your advice, round_freeze_end should work. I will use it if I don't find something more reliable.
I need to implement the same algorithm in an extension and getting m_bFreezePeriod would be too complicated for such a small feature.
For round_freeze_end my concern is that if the plugin or the extension is started in the middle of the round it is hard to tell whether freeze time ended or not.
I think there might be a datamap variable which is set to false for the freeze time period and blocks player movement.

UPD now I see that it's regulated by CCSPlayer::CanMove( and there is now datamap/netprop variable