feat: add extract_protocol tool to retrieve protocol signature from Overte's libnetworking.so

tools/extract_protocol.cpp

@@ -0,0 +1,48 @@
+// Extract protocol signature from Overte's libnetworking.so
+// Compile: g++ -o extract_protocol extract_protocol.cpp -L/opt/overte/lib -lnetworking -Wl,-rpath,/opt/overte/lib
+// Run: LD_LIBRARY_PATH=/opt/overte/lib:$LD_LIBRARY_PATH ./extract_protocol
+
+#include <iostream>
+#include <iomanip>
+#include <cstdint>
+#include <cstring>
+
+// Declare the external C++ mangled function from libnetworking.so
+// Symbol: _Z31protocolVersionsSignatureBase64v
+extern "C" {
+    // We don't know the exact return type, but it's likely a QString or similar
+    // Let's try to call the hex version instead
+    // Symbol: _Z28protocolVersionsSignatureHexv
+    void* _Z28protocolVersionsSignatureHexv();
+    void* _Z31protocolVersionsSignatureBase64v();
+    void* _Z25protocolVersionsSignaturev();
+}
+
+int main() {
+    std::cout << "Attempting to extract protocol signature from /opt/overte/lib/libnetworking.so" << std::endl;
+    
+    try {
+        // Call the mangled function
+        void* result = _Z31protocolVersionsSignatureBase64v();
+        
+        // Qt QString structure (simplified - may not work):
+        // Assuming QString is returned by value or we get a pointer
+        // This is tricky without Qt headers...
+        
+        std::cout << "Got result pointer: " << result << std::endl;
+        
+        // Try the raw bytes version instead
+        void* raw_result = _Z25protocolVersionsSignaturev();
+        std::cout << "Got raw result pointer: " << raw_result << std::endl;
+        
+        // Without Qt, this won't work properly
+        std::cout << "ERROR: This approach requires linking against Qt and including Qt headers" << std::endl;
+        std::cout << "Try using 'strings' command instead:" << std::endl;
+        std::cout << "  strings /opt/overte/domain-server | grep -E '^[A-Za-z0-9+/]{22}==$'" << std::endl;
+        
+    } catch (...) {
+        std::cout << "Exception caught" << std::endl;
+    }
+    
+    return 0;
+}