From c0792e54052bd3222c3b00e45f7e81c87187504a Mon Sep 17 00:00:00 2001
From: Bert Belder <bertbelder@gmail.com>
Date: Sat, 29 Oct 2011 02:00:04 +0200
Subject: [PATCH] Windows: the correct way to make TCP_KEEPALIVE work on MinGW

---
 src/win/tcp.c     | 2 +-
 src/win/winsock.h | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/win/tcp.c b/src/win/tcp.c
index 485d93da..662090d0 100644
--- a/src/win/tcp.c
+++ b/src/win/tcp.c
@@ -71,7 +71,7 @@ static int uv__tcp_keepalive(uv_tcp_t* handle, SOCKET socket, int enable, unsign
 
   if (enable && setsockopt(socket,
                            IPPROTO_TCP,
-                           SO_KEEPALIVE,
+                           TCP_KEEPALIVE,
                            (const char*)&delay,
                            sizeof delay) == -1) {
     uv__set_sys_error(handle->loop, errno);
diff --git a/src/win/winsock.h b/src/win/winsock.h
index beee0321..433ce476 100644
--- a/src/win/winsock.h
+++ b/src/win/winsock.h
@@ -37,6 +37,10 @@
 # define SO_UPDATE_CONNECT_CONTEXT 0x7010
 #endif
 
+#ifndef TCP_KEEPALIVE
+# define TCP_KEEPALIVE 3
+#endif
+
 #ifndef IPV6_V6ONLY
   #define IPV6_V6ONLY 27
 #endif