pingserver: allow setting payload size

refs #2699

Change-Id: I45181845e196ea390f0b6b39165097df510f9116
diff --git a/tools/ping/server/ping-server.hpp b/tools/ping/server/ping-server.hpp
index ddc3a19..c5e9634 100644
--- a/tools/ping/server/ping-server.hpp
+++ b/tools/ping/server/ping-server.hpp
@@ -39,6 +39,7 @@
   bool shouldLimitSatisfied;          //!< should limit the number of pings satisfied
   int nMaxPings;                      //!< max number of pings to satisfy
   bool shouldPrintTimestamp;          //!< print timestamp when response sent
+  int payloadSize;                    //!< user specified payload size
 };
 
 /**
@@ -90,6 +91,7 @@
   KeyChain m_keyChain;
   int m_nPings;
   Face& m_face;
+  Block m_payload;
 };
 
 } // namespace server