From 6a015d337d6a786adb319c3f9de7b9b7e9ae80bb Mon Sep 17 00:00:00 2001
From: cyberta <cyberta@riseup.net>
Date: Tue, 21 Jan 2020 16:10:59 -0600
Subject: implement no-dns fallback using okhttp's Dns interface

---
 .../java/se/leap/bitmaskclient/DnsResolver.java    | 33 ++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 app/src/main/java/se/leap/bitmaskclient/DnsResolver.java

(limited to 'app/src/main/java/se/leap/bitmaskclient/DnsResolver.java')

diff --git a/app/src/main/java/se/leap/bitmaskclient/DnsResolver.java b/app/src/main/java/se/leap/bitmaskclient/DnsResolver.java
new file mode 100644
index 00000000..55cf1123
--- /dev/null
+++ b/app/src/main/java/se/leap/bitmaskclient/DnsResolver.java
@@ -0,0 +1,33 @@
+package se.leap.bitmaskclient;
+
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.util.ArrayList;
+import java.util.List;
+
+import okhttp3.Dns;
+
+class DnsResolver implements Dns {
+
+    @Override
+    public List<InetAddress> lookup(String hostname) throws UnknownHostException {
+        try {
+            return Dns.SYSTEM.lookup(hostname);
+        } catch (UnknownHostException e) {
+            ProviderObservable observable = ProviderObservable.getInstance();
+            Provider currentProvider;
+            if (observable.getProviderToSetup() != null) {
+                currentProvider = observable.getProviderToSetup();
+            } else {
+                currentProvider = observable.getCurrentProvider();
+            }
+            if (currentProvider != null && currentProvider.hasProviderIp()) {
+                ArrayList<InetAddress> addresses = new ArrayList<>();
+                addresses.add(InetAddress.getByAddress(hostname, currentProvider.getProviderIpAsBytes()));
+                return addresses;
+            } else {
+                throw new UnknownHostException("Hostname " + hostname + " not found");
+            }
+        }
+    }
+}
-- 
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