From 938fa1170d35b27157ef305087bd2b7d49d0b5a9 Mon Sep 17 00:00:00 2001
From: MurphyZhao <d2014zjt@163.com>
Date: Wed, 17 Jan 2018 15:49:04 +0800
Subject: [PATCH] [dfs] add IN6_IS_ADDR_MULTICAST support in
 components/dfs/filesystems/net/netinet/in.h, add IN6_IS_ADDR_MULTICAST
 support

---
 components/dfs/filesystems/net/netinet/in.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/components/dfs/filesystems/net/netinet/in.h b/components/dfs/filesystems/net/netinet/in.h
index 93469bc8e3..24fe8b5409 100644
--- a/components/dfs/filesystems/net/netinet/in.h
+++ b/components/dfs/filesystems/net/netinet/in.h
@@ -27,4 +27,8 @@
 
 #include <lwip/sockets.h>
 
+#ifndef IN6_IS_ADDR_MULTICAST
+#define IN6_IS_ADDR_MULTICAST(a) (((uint8_t *) (a))[0] == 0xff)
+#endif
+
 #endif