From ee184a558ca7dca44dd23abadf3e69b0a08230f2 Mon Sep 17 00:00:00 2001
From: "Tux3 / Mlkj / !Lev.uXFMLA" <barrdetwix@gmail.com>
Date: Sat, 9 Aug 2014 22:07:32 +0200
Subject: [PATCH] Fallback to IPv4 if IPv6 fails

Fixes #181
---
 core.cpp | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/core.cpp b/core.cpp
index 920c28218..b54b18783 100644
--- a/core.cpp
+++ b/core.cpp
@@ -97,9 +97,22 @@ void Core::start()
     tox = tox_new(enableIPv6);
     if (tox == nullptr)
     {
-        qCritical() << "Tox core failed to start";
-        emit failedToStart();
-        return;
+        if (enableIPv6) // Fallback to IPv4
+        {
+            tox = tox_new(false);
+            if (tox == nullptr)
+            {
+                qCritical() << "Tox core failed to start";
+                emit failedToStart();
+                return;
+            }
+        }
+        else
+        {
+            qCritical() << "Tox core failed to start";
+            emit failedToStart();
+            return;
+        }
     }
 
     toxav = toxav_new(tox, TOXAV_MAX_CALLS);