解决本地的dns的解析问题

Tun/Punchnet/DNS/DNSLocalClient.swift

@@ -81,26 +81,25 @@ final class DNSLocalClient {
     }
     
     private func handleResponse(data: Data) {
-        let dnsParser = DNSParser(data: data, offset: 0)
-        if let message = dnsParser.parse() {
-            let tranId = message.transactionID
+        guard data.count > 2 else {
+            return
+        }
         
-            locker.lock()
-            let items = self.trackers.removeValue(forKey: tranId)
-            locker.unlock()
+        let tranId = UInt16(data[0]) << 8 | UInt16(data[1])
         
-            if let items {
-                items.forEach { tracker in
-                    let packet = Self.createDNSResponse(
-                        payload: data,
-                        srcIP: DNSHelper.dnsDestIpAddr,
-                        srcPort: 53,
-                        destIP: tracker.clientIP,
-                        destPort: tracker.clientPort
-                    )
-                    self.packetContinuation.yield(packet)
-                }
-            }
+        locker.lock()
+        let items = self.trackers.removeValue(forKey: tranId)
+        locker.unlock()
+        
+        items?.forEach { tracker in
+            let packet = Self.createDNSResponse(
+                payload: data,
+                srcIP: DNSHelper.dnsDestIpAddr,
+                srcPort: 53,
+                destIP: tracker.clientIP,
+                destPort: tracker.clientPort
+            )
+            self.packetContinuation.yield(packet)
         }
     }