Use pong receive time rather than processing time

Author: sipa

src/main.cpp

@@ -3544,7 +3544,7 @@ void static ProcessGetData(CNode* pfrom)
     }
 }
 
-bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
+bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv, int64_t nTimeReceived)
 {
     RandAddSeedPerfmon();
     LogPrint("net", "received: %s (%u bytes)\n", strCommand, vRecv.size());
@@ -4054,7 +4054,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
 
     else if (strCommand == "pong")
     {
-        int64_t pingUsecEnd = GetTimeMicros();
+        int64_t pingUsecEnd = nTimeReceived;
         uint64_t nonce = 0;
         size_t nAvail = vRecv.in_avail();
         bool bPingFinished = false;
@@ -4305,7 +4305,7 @@ bool ProcessMessages(CNode* pfrom)
         bool fRet = false;
         try
         {
-            fRet = ProcessMessage(pfrom, strCommand, vRecv);
+            fRet = ProcessMessage(pfrom, strCommand, vRecv, msg.nTime);
             boost::this_thread::interruption_point();
         }
         catch (std::ios_base::failure& e)

src/net.cpp

@@ -653,6 +653,9 @@ bool CNode::ReceiveMsgBytes(const char *pch, unsigned int nBytes)
 
         pch += handled;
         nBytes -= handled;
+
+        if (msg.complete())
+            msg.nTime = GetTimeMicros();
     }
 
     return true;

src/net.h

@@ -173,11 +173,14 @@ class CNetMessage {
     CDataStream vRecv;              // received message data
     unsigned int nDataPos;
 
+    int64_t nTime;                  // time (in microseconds) of message receipt.
+
     CNetMessage(int nTypeIn, int nVersionIn) : hdrbuf(nTypeIn, nVersionIn), vRecv(nTypeIn, nVersionIn) {
         hdrbuf.resize(24);
         in_data = false;
         nHdrPos = 0;
         nDataPos = 0;
+        nTime = 0;
     }
 
     bool complete() const