From 2140e2c08cb1137d43da5b1be8999c5509f2b609 Mon Sep 17 00:00:00 2001
From: Crunkle <justcrunkle@hotmail.co.uk>
Date: Sun, 8 Sep 2019 15:46:47 +0100
Subject: [PATCH] win,mingw: Fix undefined MCAST_* constants
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Fixes: https://github.com/libuv/libuv/issues/2464
Refs: https://github.com/libuv/libuv/pull/2471
PR-URL: https://github.com/libuv/libuv/pull/2461
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Saúl Ibarra Corretgé <s@saghul.net>
---
 src/win/winsock.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/win/winsock.h b/src/win/winsock.h
index 7ecb755b..2af95887 100644
--- a/src/win/winsock.h
+++ b/src/win/winsock.h
@@ -54,6 +54,14 @@
 # define SIO_BASE_HANDLE 0x48000022
 #endif
 
+#ifndef MCAST_JOIN_SOURCE_GROUP
+# define MCAST_JOIN_SOURCE_GROUP 45
+#endif
+
+#ifndef MCAST_LEAVE_SOURCE_GROUP
+# define MCAST_LEAVE_SOURCE_GROUP 46
+#endif
+
 /*
  * TDI defines that are only in the DDK.
  * We only need receive flags so far.