Initial commit

lib/moxdns.dart

@@ -0,0 +1,42 @@
+import "dart:async";
+import "dart:collection";
+
+import "package:flutter/services.dart";
+
+class SrvRecord {
+  final String target;
+  final int port;
+  final int priority;
+  final int weight;
+
+  const SrvRecord({ required this.target, required this.port, required this.priority, required this.weight });
+}
+
+class Moxdns {
+  static const MethodChannel _channel = MethodChannel("moxdns");
+
+  static Future<List<SrvRecord>> srvQuery(String domain, bool dnssec) async {
+    try {
+      final List<dynamic> results = await _channel.invokeMethod("srvQuery", [ domain, dnssec ]);
+    } on PlatformException catch(e) {
+      return const [];
+    }
+
+    final records = List<SrvRecord>.empty(growable: true);
+    for (var record in results) {
+      if (record == null) {
+        continue;
+      }
+
+      final rr = Map<String, String>.from(record);
+      records.add(SrvRecord(
+          target: rr["target"]!,
+          port: int.parse(rr["port"]!),
+          priority: int.parse(rr["priority"]!),
+          weight: int.parse(rr["weight"]!)
+      ));
+    }
+
+    return records;
+  }
+}