Miroslav Lichvar 666ece122e ntp: compare receive timestamp when checking for duplicate ...

Compare both receive and transmit timestamps in the NTP test number 1.

This prevents a client from dropping a valid response in the interleaved
mode if it follows a response in the basic mode and the server did not
have a kernel/hardware transmit timestamp, and the random bits of the
two timestamps happen to be the same (chance of 1 in 2^(32-precision)).

2018-02-26 13:42:04 +01:00

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