Refactor NetConf

* Unify DHCP handler classes
* Drop pickled state file
* Pass data explicitely
* Store configuration in GSettings
* Add some tests
* Extract DNS server handling

CHANGELOG.md

@@ -6,6 +6,7 @@
 
 * Raise minimum Python version to 3.8
 * Hide recent connections associated with unavailable adapters
+* Store network configuration in GSettings instead of /var/lib/blueman/network.state.
 
 ## 2.3
 

blueman/main/DNSServerProvider.py

@@ -0,0 +1,24 @@
+import re
+from ipaddress import IPv4Address
+from typing import List, Generator
+
+from gi.repository import GObject
+
+
+class DNSServerProvider(GObject.GObject):
+    RESOLVER_PATH = "/etc/resolv.conf"
+
+    def __init__(self) -> None:
+        super().__init__()
+
+    @classmethod
+    def get_servers(cls) -> List[IPv4Address]:
+        return list(cls._get_servers_from_resolver())
+
+    @classmethod
+    def _get_servers_from_resolver(cls) -> Generator[IPv4Address, None, None]:
+        with open(cls.RESOLVER_PATH) as f:
+            for line in f:
+                match = re.search(r"^nameserver\s+((?:\d{1,3}\.){3}\d{1,3}$)", line)
+                if match:
+                    yield IPv4Address(match.group(1))

blueman/main/Makefile.am

@@ -10,6 +10,7 @@ blueman_PYTHON = \
 	NetConf.py \
 	SpeedCalc.py \
 	DbusService.py \
+	DNSServerProvider.py \
 	PluginManager.py \
 	Adapter.py \
 	Applet.py \