From 23a870f2fd041278762ecf819cd1467019588c58 Mon Sep 17 00:00:00 2001
From: Viktor Szakats <commit@vsz.me>
Date: Sat, 4 Apr 2020 17:49:20 +0000
Subject: [PATCH] windows: enable UnixSockets with all build toolchains

Extend existing unix socket support in Windows builds to be
enabled for all toolchain vendors or versions. (Previously
it was only supported with certain MSVC versions + more recent
Windows 10 SDKs)

Ref: https://devblogs.microsoft.com/commandline/af_unix-comes-to-windows/
Ref: https://github.com/curl/curl/issues/5162
Closes: https://github.com/curl/curl/pull/5170
---
 lib/config-win32.h  | 13 ++++++++-----
 lib/curl_addrinfo.c |  6 +-----
 2 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/lib/config-win32.h b/lib/config-win32.h
index d19665d71aece8..516baca02bfe35 100644
--- a/lib/config-win32.h
+++ b/lib/config-win32.h
@@ -719,12 +719,15 @@ Vista
 #endif
 
 /* Define to use Unix sockets. */
-#if defined(_MSC_VER) && (_MSC_VER >= 1500)
-/* sdkddkver.h first shipped with Platform SDK v6.0A included with VS2008 */
-#include <sdkddkver.h>
-#if defined(NTDDI_WIN10_RS4)
 #define USE_UNIX_SOCKETS
-#endif
+#if !defined(UNIX_PATH_MAX)
+  /* Replicating logic present in afunix.h of newer Windows 10 SDK versions */
+# define UNIX_PATH_MAX 108
+# include <ws2tcpip.h>
+  typedef struct sockaddr_un {
+    ADDRESS_FAMILY sun_family;
+    char sun_path[UNIX_PATH_MAX];
+  } SOCKADDR_UN, *PSOCKADDR_UN;
 #endif
 
 /* ---------------------------------------------------------------- */
diff --git a/lib/curl_addrinfo.c b/lib/curl_addrinfo.c
index 16c4779c1ecdbb..b2dd83423db76c 100644
--- a/lib/curl_addrinfo.c
+++ b/lib/curl_addrinfo.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -50,10 +50,6 @@
 #  define in_addr_t unsigned long
 #endif
 
-#if defined(WIN32) && defined(USE_UNIX_SOCKETS)
-#include <afunix.h>
-#endif
-
 #include <stddef.h>
 
 #include "curl_addrinfo.h"