From d870e4b95ce50b1635755025e2d8f50df093ab37 Mon Sep 17 00:00:00 2001
From: "Sven M. Hallberg" <pesco@khjk.org>
Date: Fri, 29 Aug 2014 13:46:41 +0200
Subject: [PATCH] Windows does not support in_pktinfo.ipi_spec_dst

---
 configure.ac | 4 ++++
 src/socket.c | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/configure.ac b/configure.ac
index 3c872a0..1be1466 100644
--- a/configure.ac
+++ b/configure.ac
@@ -58,6 +58,10 @@ fi
 # Windows stuff
 AC_CHECK_DECL(_WIN32)
 AM_CONDITIONAL([WINDOWS], [ test "x$ac_cv_have_decl__WIN32" = "xyes" ])
+AC_CHECK_MEMBER([struct in_pktinfo.ipi_spec_dst],
+    AC_DEFINE([HAVE_IPI_SPEC_DST], [], [struct in_pktinfo has ipi_spec_dst member]),
+    [],
+    [[#include <ws2tcpip.h>]])
 
 # -fstack-protector
 AC_ARG_ENABLE([stack-protector],
diff --git a/src/socket.c b/src/socket.c
index 4c991e7..1914316 100644
--- a/src/socket.c
+++ b/src/socket.c
@@ -527,8 +527,10 @@ int catta_send_dns_packet_ipv4(
         if (iface > 0)
             pkti->ipi_ifindex = iface;
 
+#ifdef HAVE_IPI_SPEC_DST
         if (src_address)
             pkti->ipi_spec_dst.s_addr = src_address->address;
+#endif
     }
 #elif defined(IP_MULTICAST_IF)
     if (src_address) {
-- 
2.39.2