1 files changed, 10 insertions, 2 deletions
diff --git a/src/protocol.h b/src/protocol.h
index b516f1b897..36f8b144cd 100644
--- a/src/protocol.h
+++ b/src/protocol.h
@@ -49,8 +49,16 @@ class CMessageHeader
 
     // TODO: make private (improves encapsulation)
     public:
-        enum { COMMAND_SIZE=12 };
-        char pchMessageStart[sizeof(::pchMessageStart)];
+        enum {
+            MESSAGE_START_SIZE=sizeof(::pchMessageStart),
+            COMMAND_SIZE=12,
+            MESSAGE_SIZE_SIZE=sizeof(int),
+            CHECKSUM_SIZE=sizeof(int),
+
+            MESSAGE_SIZE_OFFSET=MESSAGE_START_SIZE+COMMAND_SIZE,
+            CHECKSUM_OFFSET=MESSAGE_SIZE_OFFSET+MESSAGE_SIZE_SIZE
+        };
+        char pchMessageStart[MESSAGE_START_SIZE];
         char pchCommand[COMMAND_SIZE];
         unsigned int nMessageSize;
         unsigned int nChecksum;