Question : how to measure one-way trip time over internet?

suppose now a packet sent from A => B => C,
how to measure the one way trip time from A to B?
and B to C?

traceroute seems only give RTT, not one way time.

Answer : how to measure one-way trip time over internet?

You definitely be able to know the timing from A->B right?

So use the timing from A->C minus A->B and you will get the time for B->C.