From 0e46f9566838c529ad5b43034ea1e6686f6c7d8b Mon Sep 17 00:00:00 2001
From: Samuel Holland <samuel@sholland.org>
Date: Wed, 23 Aug 2017 18:02:37 -0500
Subject: [PATCH] Config/Interface: Allow copyFrom() to work on null

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---
 .../java/com/wireguard/config/Config.java     | 21 +++++++++++++------
 .../java/com/wireguard/config/Interface.java  | 18 +++++++++++-----
 2 files changed, 28 insertions(+), 11 deletions(-)

diff --git a/app/src/main/java/com/wireguard/config/Config.java b/app/src/main/java/com/wireguard/config/Config.java
index c7fdcc87..8f61dbdd 100644
--- a/app/src/main/java/com/wireguard/config/Config.java
+++ b/app/src/main/java/com/wireguard/config/Config.java
@@ -61,12 +61,21 @@ public class Config extends BaseObservable
 
     @Override
     public void copyFrom(final Config source) {
-        iface.copyFrom(source.iface);
-        isEnabled = source.isEnabled;
-        name = source.name;
-        peers.clear();
-        for (final Peer peer : source.peers)
-            addPeer(peer);
+        if (source != null) {
+            iface.copyFrom(source.iface);
+            isEnabled = source.isEnabled;
+            isPrimary = source.isPrimary;
+            name = source.name;
+            peers.clear();
+            for (final Peer peer : source.peers)
+                addPeer(peer);
+        } else {
+            iface.copyFrom(null);
+            isEnabled = false;
+            isPrimary = false;
+            name = null;
+            peers.clear();
+        }
     }
 
     public Interface getInterface() {
diff --git a/app/src/main/java/com/wireguard/config/Interface.java b/app/src/main/java/com/wireguard/config/Interface.java
index 0ab15a7d..b81b6d99 100644
--- a/app/src/main/java/com/wireguard/config/Interface.java
+++ b/app/src/main/java/com/wireguard/config/Interface.java
@@ -29,11 +29,19 @@ public class Interface extends BaseObservable implements Copyable<Interface>, Ob
 
     @Override
     public void copyFrom(final Interface source) {
-        address = source.address;
-        dns = source.dns;
-        listenPort = source.listenPort;
-        setPrivateKey(source.privateKey);
-        mtu = source.mtu;
+        if (source != null) {
+            address = source.address;
+            dns = source.dns;
+            listenPort = source.listenPort;
+            mtu = source.mtu;
+            setPrivateKey(source.privateKey);
+        } else {
+            address = null;
+            dns = null;
+            listenPort = null;
+            mtu = null;
+            setPrivateKey(null);
+        }
     }
 
     public void generateKeypair() {