log bytes recv/sent per command

src/net.cpp

@@ -67,6 +67,15 @@ namespace {
     };
 }
 
+//immutable thread safe array of allowed commands for logging inbound traffic
+const static std::string logAllowIncomingMsgCmds[] = {
+    "version", "addr", "inv", "getdata", "merkleblock",
+    "getblocks", "getheaders", "tx", "headers", "block",
+    "getaddr", "mempool", "ping", "pong", "alert", "notfound",
+    "filterload", "filteradd", "filterclear", "reject"};
+
+const static std::string NET_MESSAGE_COMMAND_OTHER = "*other*";
+
 //
 // Global state variables
 //
@@ -627,7 +636,9 @@ void CNode::copyStats(CNodeStats &stats)
     X(fInbound);
     X(nStartingHeight);
     X(nSendBytes);
+    X(mapSendBytesPerMsgCmd);
     X(nRecvBytes);
+    X(mapRecvBytesPerMsgCmd);
     X(fWhitelisted);
 
     // It is common for nodes with good ping times to suddenly become lagged,
@@ -682,6 +693,15 @@ bool CNode::ReceiveMsgBytes(const char *pch, unsigned int nBytes)
         nBytes -= handled;
 
         if (msg.complete()) {
+
+            //store received bytes per message command
+            //to prevent a memory DOS, only allow valid commands
+            mapMsgCmdSize::iterator i = mapRecvBytesPerMsgCmd.find(msg.hdr.pchCommand);
+            if (i == mapRecvBytesPerMsgCmd.end())
+                i = mapRecvBytesPerMsgCmd.find(NET_MESSAGE_COMMAND_OTHER);
+            assert(i != mapRecvBytesPerMsgCmd.end());
+            i->second += msg.hdr.nMessageSize + CMessageHeader::HEADER_SIZE;
+
             msg.nTime = GetTimeMicros();
             messageHandlerCondition.notify_one();
         }
@@ -2378,6 +2398,9 @@ CNode::CNode(SOCKET hSocketIn, const CAddress& addrIn, const std::string& addrNa
     nPingUsecTime = 0;
     fPingQueued = false;
     nMinPingUsecTime = std::numeric_limits<int64_t>::max();
+    for (unsigned int i = 0; i < sizeof(logAllowIncomingMsgCmds)/sizeof(logAllowIncomingMsgCmds[0]); i++)
+        mapRecvBytesPerMsgCmd[logAllowIncomingMsgCmds[i]] = 0;
+    mapRecvBytesPerMsgCmd[NET_MESSAGE_COMMAND_OTHER] = 0;
 
     {
         LOCK(cs_nLastNodeId);
@@ -2457,7 +2480,7 @@ void CNode::AbortMessage() UNLOCK_FUNCTION(cs_vSend)
     LogPrint("net", "(aborted)\n");
 }
 
-void CNode::EndMessage() UNLOCK_FUNCTION(cs_vSend)
+void CNode::EndMessage(const char* pszCommand) UNLOCK_FUNCTION(cs_vSend)
 {
     // The -*messagestest options are intentionally not documented in the help message,
     // since they are only used during development to debug the networking code and are
@@ -2480,6 +2503,9 @@ void CNode::EndMessage() UNLOCK_FUNCTION(cs_vSend)
     unsigned int nSize = ssSend.size() - CMessageHeader::HEADER_SIZE;
     WriteLE32((uint8_t*)&ssSend[CMessageHeader::MESSAGE_SIZE_OFFSET], nSize);
 
+    //log total amount of bytes per command
+    mapSendBytesPerMsgCmd[std::string(pszCommand)] += nSize + CMessageHeader::HEADER_SIZE;
+
     // Set the checksum
     uint256 hash = Hash(ssSend.begin() + CMessageHeader::HEADER_SIZE, ssSend.end());
     unsigned int nChecksum = 0;

src/net.h

@@ -182,6 +182,7 @@ struct LocalServiceInfo {
 
 extern CCriticalSection cs_mapLocalHost;
 extern std::map<CNetAddr, LocalServiceInfo> mapLocalHost;
+typedef std::map<std::string, uint64_t> mapMsgCmdSize; //command, total bytes
 
 class CNodeStats
 {
@@ -199,7 +200,9 @@ public:
     bool fInbound;
     int nStartingHeight;
     uint64_t nSendBytes;
+    mapMsgCmdSize mapSendBytesPerMsgCmd;
     uint64_t nRecvBytes;
+    mapMsgCmdSize mapRecvBytesPerMsgCmd;
     bool fWhitelisted;
     double dPingTime;
     double dPingWait;
@@ -373,6 +376,9 @@ protected:
     static std::vector<CSubNet> vWhitelistedRange;
     static CCriticalSection cs_vWhitelistedRange;
 
+    mapMsgCmdSize mapSendBytesPerMsgCmd;
+    mapMsgCmdSize mapRecvBytesPerMsgCmd;
+
     // Basic fuzz-testing
     void Fuzz(int nChance); // modifies ssSend
 
@@ -525,7 +531,7 @@ public:
     void AbortMessage() UNLOCK_FUNCTION(cs_vSend);
 
     // TODO: Document the precondition of this function.  Is cs_vSend locked?
-    void EndMessage() UNLOCK_FUNCTION(cs_vSend);
+    void EndMessage(const char* pszCommand) UNLOCK_FUNCTION(cs_vSend);
 
     void PushVersion();
 
@@ -535,7 +541,7 @@ public:
         try
         {
             BeginMessage(pszCommand);
-            EndMessage();
+            EndMessage(pszCommand);
         }
         catch (...)
         {
@@ -551,7 +557,7 @@ public:
         {
             BeginMessage(pszCommand);
             ssSend << a1;
-            EndMessage();
+            EndMessage(pszCommand);
         }
         catch (...)
         {
@@ -567,7 +573,7 @@ public:
         {
             BeginMessage(pszCommand);
             ssSend << a1 << a2;
-            EndMessage();
+            EndMessage(pszCommand);
         }
         catch (...)
         {
@@ -583,7 +589,7 @@ public:
         {
             BeginMessage(pszCommand);
             ssSend << a1 << a2 << a3;
-            EndMessage();
+            EndMessage(pszCommand);
         }
         catch (...)
         {
@@ -599,7 +605,7 @@ public:
         {
             BeginMessage(pszCommand);
             ssSend << a1 << a2 << a3 << a4;
-            EndMessage();
+            EndMessage(pszCommand);
         }
         catch (...)
         {
@@ -615,7 +621,7 @@ public:
         {
             BeginMessage(pszCommand);
             ssSend << a1 << a2 << a3 << a4 << a5;
-            EndMessage();
+            EndMessage(pszCommand);
         }
         catch (...)
         {
@@ -631,7 +637,7 @@ public:
         {
             BeginMessage(pszCommand);
             ssSend << a1 << a2 << a3 << a4 << a5 << a6;
-            EndMessage();
+            EndMessage(pszCommand);
         }
         catch (...)
         {
@@ -647,7 +653,7 @@ public:
         {
             BeginMessage(pszCommand);
             ssSend << a1 << a2 << a3 << a4 << a5 << a6 << a7;
-            EndMessage();
+            EndMessage(pszCommand);
         }
         catch (...)
         {
@@ -663,7 +669,7 @@ public:
         {
             BeginMessage(pszCommand);
             ssSend << a1 << a2 << a3 << a4 << a5 << a6 << a7 << a8;
-            EndMessage();
+            EndMessage(pszCommand);
         }
         catch (...)
         {
@@ -679,7 +685,7 @@ public:
         {
             BeginMessage(pszCommand);
             ssSend << a1 << a2 << a3 << a4 << a5 << a6 << a7 << a8 << a9;
-            EndMessage();
+            EndMessage(pszCommand);
         }
         catch (...)
         {

src/rpcnet.cpp

@@ -111,6 +111,14 @@ UniValue getpeerinfo(const UniValue& params, bool fHelp)
             "       n,                        (numeric) The heights of blocks we're currently asking from this peer\n"
             "       ...\n"
             "    ]\n"
+            "    \"bytessent_per_msg\": {\n"
+            "       \"addr\": n,             (numeric) The total bytes sent aggregated by message type\n"
+            "       ...\n"
+            "    }\n"
+            "    \"bytesrecv_per_msg\": {\n"
+            "       \"addr\": n,             (numeric) The total bytes received aggregated by message type\n"
+            "       ...\n"
+            "    }\n"
             "  }\n"
             "  ,...\n"
             "]\n"
@@ -165,6 +173,20 @@ UniValue getpeerinfo(const UniValue& params, bool fHelp)
         }
         obj.push_back(Pair("whitelisted", stats.fWhitelisted));
 
+        UniValue sendPerMsgCmd(UniValue::VOBJ);
+        BOOST_FOREACH(const mapMsgCmdSize::value_type &i, stats.mapSendBytesPerMsgCmd) {
+            if (i.second > 0)
+                sendPerMsgCmd.push_back(Pair(i.first, i.second));
+        }
+        obj.push_back(Pair("bytessent_per_msg", sendPerMsgCmd));
+
+        UniValue recvPerMsgCmd(UniValue::VOBJ);
+        BOOST_FOREACH(const mapMsgCmdSize::value_type &i, stats.mapRecvBytesPerMsgCmd) {
+            if (i.second > 0)
+                recvPerMsgCmd.push_back(Pair(i.first, i.second));
+        }
+        obj.push_back(Pair("bytesrecv_per_msg", recvPerMsgCmd));
+
         ret.push_back(obj);
     }