commit 65f778fc523950b6e4f39f18af9994ca330fefcf
author QUICHE team <quiche-dev@google.com> Wed Apr 17 14:28:20 2019 -0700
committer Copybara-Service <copybara-worker@google.com> Thu Apr 18 04:57:41 2019 -0700
tree 40ec2fd77b13fa3a2e5b365690de2817baf3d4c6
parent 1b4afd19c10de88618ee1e1a58c4bef93b361828

Create a RandomDelayLink (and symmetric version) and use it in QuartcBidiTest.

Random delay is one of the features of the network simulation Quartc uses in its
upper-layer quality tests.  It is used to simulate poor network profiles where
random interference or delays may occur.

This change extends OneWayLink to allow tests to specify a random delay (to be
added to the transfer time and propagation delay).  The additional random delay
follows an exponential distribution, with the tail chopped off at the chosen
maximum delay.

QuartcBidiTest adds a case which uses random delay with a median of 25 ms.

gfe-relnote: n/a (test only)
PiperOrigin-RevId: 244067695
Change-Id: I83c05cc5d2b9973644b501f384ed3c431ae761fd