From 7a4efa9257fa6e33bd50afeeae27df0b6d72df56 Mon Sep 17 00:00:00 2001
From: Dennis Schwerdel <schwerdel@informatik.uni-kl.de>
Date: Fri, 12 Aug 2016 08:39:04 +0200
Subject: [PATCH] Prefer IPv4 over IPv6 when possible

---
 src/util.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/util.rs b/src/util.rs
index 381a2c5..10c6a67 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -127,6 +127,11 @@ pub fn resolve<Addr: ToSocketAddrs+fmt::Display>(addr: Addr) -> Result<Vec<Socke
     let addrs = try!(addr.to_socket_addrs().map_err(|_| Error::Name(format!("{}", addr))));
     // Remove duplicates in addrs (why are there duplicates???)
     let mut addrs = addrs.collect::<Vec<_>>();
+    // Try IPv4 first as it usually is faster
+    addrs.sort_by_key(|addr| match *addr {
+        SocketAddr::V4(_) => 4,
+        SocketAddr::V6(_) => 6
+    });
     addrs.dedup();
     Ok(addrs)
 }