Fixed serious issue where oversized packets would be split apart by libevent without proper handling by the db core. Removed Google Sanitizers

db/CMakeLists.txt

@@ -26,6 +26,3 @@ find_package(Libevent CONFIG REQUIRED)
 target_link_libraries(${PROJECT_NAME} PRIVATE libevent::core libevent::extra libevent::pthreads)
 
 target_link_libraries(${PROJECT_NAME} PRIVATE libpoly libsql libthecore)
-
-# Memory debugging
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address -g")

db/src/Peer.cpp

@@ -63,12 +63,19 @@ void CPeer::SetUserCount(DWORD dwCount)
 
 bool CPeer::PeekPacket(int & iBytesProceed, BYTE & header, DWORD & dwHandle, DWORD & dwLength, const char ** data)
 {
+    // Return if not enough data was received to read the header
 	if (GetRecvLength() < iBytesProceed + 9)
 		return false;
 
 	const char * buf = (const char *) GetRecvBuffer(iBytesProceed + 9);
+    if (!buf) {
+        sys_err("PeekPacket: Failed to get network buffer!");
+        return false;
+    }
+
 	buf += iBytesProceed;
 
+    // Read the header data
 	header	= *(buf++);
 
 	dwHandle	= *((DWORD *) buf);
@@ -77,7 +84,7 @@ bool CPeer::PeekPacket(int & iBytesProceed, BYTE & header, DWORD & dwHandle, DWO
 	dwLength	= *((DWORD *) buf);
 	buf		+= sizeof(DWORD);
 
-	//sys_log(0, "%d header %d handle %u length %u", GetRecvLength(), header, dwHandle, dwLength);
+    // Ensure that all the data was fully received
 	if (iBytesProceed + dwLength + 9 > (DWORD) GetRecvLength())
 	{
 		sys_log(0, "PeekPacket: not enough buffer size: len %u, recv %d", 
@@ -85,6 +92,17 @@ bool CPeer::PeekPacket(int & iBytesProceed, BYTE & header, DWORD & dwHandle, DWO
 		return false;
 	}
 
+    // Ensure that all the required data is available in a contiguous area
+    buf = (const char *) GetRecvBuffer(iBytesProceed + dwLength + 9);
+    if (!buf) {
+        sys_err("PeekPacket: Failed to get network buffer!");
+        return false;
+    }
+
+    // Skip the header
+    buf += iBytesProceed + 9;
+
+    // Set the data pointer
 	*data = buf;
 	iBytesProceed += dwLength + 9;
 	return true;

game/CMakeLists.txt

@@ -49,4 +49,3 @@ find_package (Threads REQUIRED)
 target_link_libraries (${PROJECT_NAME} Threads::Threads)
 
 target_link_libraries(${PROJECT_NAME} libgame libpoly libsql libthecore liblua)
-