nfproxy module writing: written part of the firegex lib, frontend refactored and improved, c++ improves

backend/binsrc/pyproxy/settings.cpp

@@ -0,0 +1,71 @@
+#ifndef PROXY_TUNNEL_SETTINGS_CPP
+#define PROXY_TUNNEL_SETTINGS_CPP
+
+#include <Python.h>
+
+#include <vector>
+#include <memory>
+#include <iostream>
+
+using namespace std;
+
+namespace Firegex {
+namespace PyProxy {
+
+
+class PyCodeConfig{
+	public:
+		PyObject* glob = nullptr;
+		PyObject* local = nullptr;
+
+	private:
+		void _clean(){
+			Py_XDECREF(glob);
+			Py_XDECREF(local);
+		}
+	public:
+
+		PyCodeConfig(const string& pycode){
+			
+			PyObject* compiled_code = Py_CompileStringExFlags(pycode.c_str(), "<pyfilter>", Py_file_input, NULL, 2);
+			if (compiled_code == nullptr){
+				std::cerr << "[fatal] [main] Failed to compile the code" << endl;
+				_clean();
+				throw invalid_argument("Failed to compile the code");
+			}
+			glob = PyDict_New();
+			local = PyDict_New();
+			PyObject* result = PyEval_EvalCode(compiled_code, glob, local);
+			Py_XDECREF(compiled_code);
+			if (!result){
+				PyErr_Print();
+				_clean();
+				std::cerr << "[fatal] [main] Failed to execute the code" << endl;
+				throw invalid_argument("Failed to execute the code, maybe an invalid filter code has been provided");
+			}
+			Py_DECREF(result);
+		}
+		PyCodeConfig(){}
+
+		~PyCodeConfig(){
+			_clean();
+		}
+};
+
+shared_ptr<PyCodeConfig> config;
+PyObject* py_handle_packet_code = nullptr;
+
+void init_handle_packet_code(){
+	py_handle_packet_code = Py_CompileStringExFlags(
+		"firegex.nfproxy.internals.handle_packet()\n", "<pyfilter>",
+	Py_file_input, NULL, 2);
+
+	if (py_handle_packet_code == nullptr){
+		std::cerr << "[fatal] [main] Failed to compile the utility python code (strange behaviour, probably a bug)" << endl;
+		throw invalid_argument("Failed to compile the code");
+	}
+}
+
+}}
+#endif // PROXY_TUNNEL_SETTINGS_CPP
+