1 files changed, 48 insertions, 0 deletions
diff --git a/trackersservicestandalone/src/main/java/foundation/e/advancedprivacy/trackers/service/data/RequestDNSRepository.kt b/trackersservicestandalone/src/main/java/foundation/e/advancedprivacy/trackers/service/data/RequestDNSRepository.kt
new file mode 100644
index 0000000..d9370be
--- /dev/null
+++ b/trackersservicestandalone/src/main/java/foundation/e/advancedprivacy/trackers/service/data/RequestDNSRepository.kt
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2023 MURENA SAS
+ *
+ * This program 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.
+ *
+ * This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package foundation.e.advancedprivacy.trackers.service.data
+
+import foundation.e.advancedprivacy.core.utils.runSuspendCatching
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import org.pcap4j.packet.DnsPacket
+import timber.log.Timber
+import java.net.DatagramPacket
+import java.net.DatagramSocket
+
+class RequestDNSRepository {
+
+    suspend fun processDNS(request: DatagramPacket): DnsPacket? = withContext(Dispatchers.IO) {
+        runSuspendCatching {
+            var response: DnsPacket? = null
+            val datagramSocket = DatagramSocket()
+            datagramSocket.send(request)
+
+            // Await response from DNS server
+            val buf = ByteArray(1024)
+            val packet = DatagramPacket(buf, buf.size)
+            datagramSocket.receive(packet)
+            val dnsResp = packet.data
+            if (dnsResp != null) {
+                response = DnsPacket.newPacket(dnsResp, 0, dnsResp.size)
+            }
+            response
+        }.onFailure {
+            Timber.w(it, "Can't make DNS request.")
+        }.getOrNull()
+    }
+}