tree d03c4368794b02d325ffb93e2a20cdc0d889651f
parent 672b9a709352f8cd582ff1a5e95a8e869593e457
author Junxiao Shi <git@mail1.yoursunny.com> 1455638604 -0700
committer Junxiao Shi <git@mail1.yoursunny.com> 1455638604 -0700

ping: protocol definition

refs #3460

Change-Id: I539f2e5144a8a5370aa1f91201eaa608d5f1ecc1