From fafbbcd7103f7c81a6bf521f1fbd6105149face2 Mon Sep 17 00:00:00 2001
From: Dirkjan Ochtman <dirkjan@ochtman.nl>
Date: Thu, 15 Oct 2020 23:16:59 +0200
Subject: [PATCH] wip

---
 quinn/src/platform/unix.rs | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/quinn/src/platform/unix.rs b/quinn/src/platform/unix.rs
index e9b3bfd00..7eacac90f 100644
--- a/quinn/src/platform/unix.rs
+++ b/quinn/src/platform/unix.rs
@@ -38,14 +38,18 @@ impl super::UdpExt for UdpSocket {
         let addr = self.local_addr()?;
 
         // macos and ios do not support IP_RECVTOS on dual-stack sockets :(
-        if addr.is_ipv4()
-            || ((!cfg!(any(target_os = "macos", target_os = "ios"))) && !self.only_v6()?)
-        {
+        if addr.is_ipv4() {
+            let proto = if !cfg!(any(target_os = "macos", target_os = "ios")) && !self.only_v6()? {
+                libc::IPPROTO_IPV6
+            } else {
+                libc::IPPROTO_IP
+            };
+
             let on: libc::c_int = 1;
             let rc = unsafe {
                 libc::setsockopt(
                     self.as_raw_fd(),
-                    libc::IPPROTO_IP,
+                    proto,
                     libc::IP_RECVTOS,
                     &on as *const _ as _,
                     mem::size_of_val(&on) as _,