Merge pull request #4878

540ac45 Avoid returning many "inv" orphans (Jeff Garzik)
d4168c8 Limit CNode::mapAskFor (Wladimir J. van der Laan)

src/main.cpp

@@ -3641,6 +3641,11 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
 
             // Track requests for our stuff
             g_signals.Inventory(inv.hash);
+
+            if (pfrom->nSendSize > (SendBufferSize() * 2)) {
+                Misbehaving(pfrom->GetId(), 50);
+                return error("send buffer size() = %u", pfrom->nSendSize);
+            }
         }
     }