ui: added proto/ directory

ui/opensnitch/proto/__init__.py

@@ -0,0 +1,57 @@
+#   Copyright (C) 2018      Simone Margaritelli
+#                 2019-2025 Gustavo Iñiguez Goia
+#
+#   This file is part of OpenSnitch.
+#
+#   OpenSnitch is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation, either version 3 of the License, or
+#   (at your option) any later version.
+#
+#   OpenSnitch is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with OpenSnitch.  If not, see <http://www.gnu.org/licenses/>.
+
+from packaging.version import Version
+import importlib
+from opensnitch.utils import Versions
+
+# Protobuffers compiled with protobuf < 3.20.0 are incompatible with
+# protobuf >= 4.0.0
+# https://github.com/evilsocket/opensnitch/wiki/GUI-known-problems#gui-does-not-show-up
+#
+# In order to solve this issue, we provide several protobuffers:
+# proto.ui_pb2* for protobuf >= 4.0.0
+# proto.pre3200.ui_pb2* for protobuf >= 3.6.0 and < 3.20.0
+#
+# To avoid import errors, each protobuffer must be placed in its own directory,
+# and the name of the protobuffer files must be named with the syntax
+# <prefix>_pb2.py/<prefix>_pb2_grpc.py:
+#  ui_pb2.py and ui_pb2_grpc.py
+
+default_pb = "opensnitch.proto.ui_pb2"
+default_grpc = "opensnitch.proto.ui_pb2_grpc"
+old_pb = "opensnitch.proto.pre3200.ui_pb2"
+old_grpc = "opensnitch.proto.pre3200.ui_pb2_grpc"
+
+def import_():
+    """load the protobuffer needed based on the grpc and protobuffer version
+    installed in the system.
+    """
+    try:
+        gui_version, grpc_version, proto_version = Versions.get()
+        proto_ver = default_pb
+        grpc_ver = default_grpc
+
+        if Version(proto_version) < Version("3.20.0"):
+            proto_ver = old_pb
+            grpc_ver = old_grpc
+
+        return importlib.import_module(proto_ver), importlib.import_module(grpc_ver)
+    except Exception as e:
+        print("error importing protobuffer: ", repr(e))
+        return importlib.import_module(default_pb, default_grpc)