Xiaoting Tang 23f817100a Introduce D6DProbeScheduler ...

Summary:
According to the spec v21
(https://tools.ietf.org/id/draft-ietf-tsvwg-datagram-plpmtud-21.html#name-sending-quic-probe-packets),
d6d probe should only contain a PING followed by many PADDING frames. As a first step, we fully comply with the spec.

Future optimizations:
- We can potentially put loss data in the probe packet to perform retransmission. This might make the probe packet more useful by increasing goodput.

Reviewed By: mjoras

Differential Revision: D22557962

fbshipit-source-id: 9a6584bc46aeb29981c4e2c4121ded127a7f2f06

2020-09-14 22:29:28 -07:00

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