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authorChristian Schneppe <christian@pix-art.de>2017-09-24 21:37:01 +0200
committerChristian Schneppe <christian@pix-art.de>2017-09-24 21:37:01 +0200
commit92752d5e54902682777b0cb15fb0c480e5796ba2 (patch)
treead4a638a4a45889babbff9df57fd34a3c9bcab83 /src/main/java/de/pixart/messenger/utils/AndroidUsingExecLowPriority.java
parent0bf2d7f2d5d6f7f45c3db14f1aebae5a5153a9bf (diff)
give exec resolver a lower priority over reflection
Diffstat (limited to 'src/main/java/de/pixart/messenger/utils/AndroidUsingExecLowPriority.java')
-rw-r--r--src/main/java/de/pixart/messenger/utils/AndroidUsingExecLowPriority.java92
1 files changed, 92 insertions, 0 deletions
diff --git a/src/main/java/de/pixart/messenger/utils/AndroidUsingExecLowPriority.java b/src/main/java/de/pixart/messenger/utils/AndroidUsingExecLowPriority.java
new file mode 100644
index 000000000..6097fcd03
--- /dev/null
+++ b/src/main/java/de/pixart/messenger/utils/AndroidUsingExecLowPriority.java
@@ -0,0 +1,92 @@
+/*
+ * Copyright 2015-2016 the original author or authors
+ *
+ * This software is licensed under the Apache License, Version 2.0,
+ * the GNU Lesser General Public License version 2 or later ("LGPL")
+ * and the WTFPL.
+ * You may choose either license to govern your use of this software only
+ * upon the condition that you accept all of the terms of either
+ * the Apache License 2.0, the LGPL 2.1+ or the WTFPL.
+ */
+
+package de.pixart.messenger.utils;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.LineNumberReader;
+import java.net.InetAddress;
+import java.util.HashSet;
+import java.util.logging.Level;
+
+import de.measite.minidns.dnsserverlookup.AbstractDNSServerLookupMechanism;
+import de.measite.minidns.dnsserverlookup.AndroidUsingReflection;
+import de.measite.minidns.dnsserverlookup.DNSServerLookupMechanism;
+import de.measite.minidns.util.PlatformDetection;
+
+/**
+ * Try to retrieve the list of DNS server by executing getprop.
+ */
+public class AndroidUsingExecLowPriority extends AbstractDNSServerLookupMechanism {
+
+ public static final DNSServerLookupMechanism INSTANCE = new AndroidUsingExecLowPriority();
+ public static final int PRIORITY = AndroidUsingReflection.PRIORITY + 1;
+
+ private AndroidUsingExecLowPriority() {
+ super(AndroidUsingExecLowPriority.class.getSimpleName(), PRIORITY);
+ }
+
+ @Override
+ public String[] getDnsServerAddresses() {
+ try {
+ Process process = Runtime.getRuntime().exec("getprop");
+ InputStream inputStream = process.getInputStream();
+ LineNumberReader lnr = new LineNumberReader(
+ new InputStreamReader(inputStream));
+ String line;
+ HashSet<String> server = new HashSet<>(6);
+ while ((line = lnr.readLine()) != null) {
+ int split = line.indexOf("]: [");
+ if (split == -1) {
+ continue;
+ }
+ String property = line.substring(1, split);
+ String value = line.substring(split + 4, line.length() - 1);
+
+ if (value.isEmpty()) {
+ continue;
+ }
+
+ if (property.endsWith(".dns") || property.endsWith(".dns1") ||
+ property.endsWith(".dns2") || property.endsWith(".dns3") ||
+ property.endsWith(".dns4")) {
+
+ // normalize the address
+
+ InetAddress ip = InetAddress.getByName(value);
+
+ if (ip == null) continue;
+
+ value = ip.getHostAddress();
+
+ if (value == null) continue;
+ if (value.length() == 0) continue;
+
+ server.add(value);
+ }
+ }
+ if (server.size() > 0) {
+ return server.toArray(new String[server.size()]);
+ }
+ } catch (IOException e) {
+ LOGGER.log(Level.WARNING, "Exception in findDNSByExec", e);
+ }
+ return null;
+ }
+
+ @Override
+ public boolean isAvailable() {
+ return PlatformDetection.isAndroid();
+ }
+
+} \ No newline at end of file