ui: allow to use multiple protobuffer 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

This has been a source of problems for some users (#1214, #647), and
in some distributions, previous protobuffer does no longer work due to
incompatibility with the protobuf package version installed
(OpenSuse Tumbleweed).

So in order to solve this issue, we provide several protobuffers,
for old and new protobuf versions:
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

The default compiled protobuffer will be opensnitch/proto/ui_*.py
instead of opensnitch/ui_*.py

Author: gustavo-iniguez-goya

ui/MANIFEST.in

@@ -1,3 +1,4 @@
+recursive-include opensnitch/proto *
 recursive-include opensnitch/res *
 recursive-include opensnitch/i18n *.qm
 recursive-include opensnitch/database/migrations *.sql

ui/bin/opensnitch-ui

@@ -42,9 +42,10 @@ from opensnitch.service import UIService
 from opensnitch.config import Config
 from opensnitch.utils import Themes, Utils, Versions, Message
 from opensnitch.utils.xdg import xdg_opensnitch_dir, xdg_current_session
-import opensnitch.ui_pb2
-from opensnitch.ui_pb2_grpc import add_UIServicer_to_server
+
 from opensnitch import auth
+import opensnitch.proto as proto
+ui_pb2, ui_pb2_grpc = proto.import_()
 
 app_id = os.path.join(xdg_opensnitch_dir, "io.github.evilsocket.opensnitch")
 
@@ -203,7 +204,7 @@ Examples:
                                     ('grpc.max_receive_message_length', maxmsglen),
                                 ))
 
-        add_UIServicer_to_server(service, server)
+        ui_pb2_grpc.add_UIServicer_to_server(service, server)
 
         auth_type = auth.Simple
         if args.socket_auth != None:

ui/opensnitch/dialogs/firewall.py

@@ -11,10 +11,11 @@
 from opensnitch.config import Config
 from opensnitch.nodes import Nodes
 from opensnitch.dialogs.firewall_rule import FwRuleDialog
-from opensnitch import ui_pb2
 import opensnitch.firewall as Fw
 import opensnitch.firewall.profiles as FwProfiles
 
+import opensnitch.proto as proto
+ui_pb2, ui_pb2_grpc = proto.import_()
 
 DIALOG_UI_PATH = "%s/../res/firewall.ui" % os.path.dirname(sys.modules[__name__].__file__)
 class FirewallDialog(QtWidgets.QDialog, uic.loadUiType(DIALOG_UI_PATH)[0]):

ui/opensnitch/dialogs/firewall_rule.py

@@ -9,10 +9,11 @@
 from opensnitch.config import Config
 from opensnitch.nodes import Nodes
 from opensnitch.utils import NetworkServices, NetworkInterfaces, QuickHelp, Icons, Utils
-from opensnitch import ui_pb2
 import opensnitch.firewall as Fw
 from opensnitch.firewall.utils import Utils as FwUtils
 
+import opensnitch.proto as proto
+ui_pb2, ui_pb2_grpc = proto.import_()
 
 DIALOG_UI_PATH = "%s/../res/firewall_rule.ui" % os.path.dirname(sys.modules[__name__].__file__)
 class FwRuleDialog(QtWidgets.QDialog, uic.loadUiType(DIALOG_UI_PATH)[0]):

ui/opensnitch/dialogs/preferences.py

@@ -14,7 +14,9 @@
 from opensnitch.utils.xdg import Autostart
 from opensnitch.notifications import DesktopNotifications
 
-from opensnitch import ui_pb2, auth
+from opensnitch import auth
+import opensnitch.proto as proto
+ui_pb2, ui_pb2_grpc = proto.import_()
 
 DIALOG_UI_PATH = "%s/../res/preferences.ui" % os.path.dirname(sys.modules[__name__].__file__)
 class PreferencesDialog(QtWidgets.QDialog, uic.loadUiType(DIALOG_UI_PATH)[0]):

ui/opensnitch/dialogs/processdetails.py

@@ -4,7 +4,9 @@
 
 from PyQt5 import QtCore, QtGui, uic, QtWidgets
 
-from opensnitch import ui_pb2
+import opensnitch.proto as proto
+ui_pb2, ui_pb2_grpc = proto.import_()
+
 from opensnitch.nodes import Nodes
 from opensnitch.desktop_parser import LinuxDesktopParser
 from opensnitch.utils import Message, Icons

ui/opensnitch/dialogs/prompt.py

@@ -20,7 +20,8 @@
 from opensnitch.actions import Actions
 from opensnitch.rules import Rules, Rule
 
-from opensnitch import ui_pb2
+import opensnitch.proto as proto
+ui_pb2, ui_pb2_grpc = proto.import_()
 
 DIALOG_UI_PATH = "%s/../res/prompt.ui" % os.path.dirname(sys.modules[__name__].__file__)
 class PromptDialog(QtWidgets.QDialog, uic.loadUiType(DIALOG_UI_PATH)[0]):

ui/opensnitch/dialogs/ruleseditor.py

@@ -7,10 +7,12 @@
 import sys
 import os
 import pwd
-from opensnitch import ui_pb2
 import time
 import ipaddress
 
+import opensnitch.proto as proto
+ui_pb2, ui_pb2_grpc = proto.import_()
+
 from opensnitch.config import Config
 from opensnitch.nodes import Nodes
 from opensnitch.database import Database

ui/opensnitch/dialogs/stats.py

@@ -8,7 +8,6 @@
 from PyQt5 import QtCore, QtGui, uic, QtWidgets
 from PyQt5.QtCore import QCoreApplication as QC
 
-from opensnitch import ui_pb2
 from opensnitch.config import Config
 from opensnitch.version import version
 from opensnitch.nodes import Nodes
@@ -27,6 +26,9 @@
 from opensnitch.actions import Actions
 from opensnitch.rules import Rule, Rules
 
+import opensnitch.proto as proto
+ui_pb2, ui_pb2_grpc = proto.import_()
+
 DIALOG_UI_PATH = "%s/../res/stats.ui" % os.path.dirname(sys.modules[__name__].__file__)
 class StatsDialog(QtWidgets.QDialog, uic.loadUiType(DIALOG_UI_PATH)[0]):
 

ui/opensnitch/firewall/__init__.py

@@ -1,6 +1,7 @@
 from PyQt5.QtCore import QObject, QCoreApplication as QC
 from google.protobuf import json_format
-from opensnitch import ui_pb2
+import opensnitch.proto as proto
+ui_pb2, ui_pb2_grpc = proto.import_()
 
 from opensnitch.nodes import Nodes
 from .enums import *