From 2bc2f3af0fb973e9fb7c07d4db3ec49842520375 Mon Sep 17 00:00:00 2001
From: Alexandre Janniaux <alexandre-janniaux@users.noreply.github.com>
Date: Fri, 9 Mar 2018 22:37:21 +0100
Subject: [PATCH] Add missing define for old android sdk (#2831)

define NETLINK_NO_ENOBUFS and IFA_D_DADFAILED if they don't exist
---
 include/libtorrent/socket.hpp | 5 +++++
 src/enum_net.cpp              | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/include/libtorrent/socket.hpp b/include/libtorrent/socket.hpp
index 1940f7acd..bbd81e6d7 100644
--- a/include/libtorrent/socket.hpp
+++ b/include/libtorrent/socket.hpp
@@ -68,6 +68,11 @@ POSSIBILITY OF SUCH DAMAGE.
 #ifndef SOL_NETLINK
 #define SOL_NETLINK 270
 #endif
+
+// NETLINK_NO_ENOBUFS exists at least since android 2.3, but is not exposed
+#if TORRENT_ANDROID && !defined NETLINK_NO_ENOBUFS
+#define NETLINK_NO_ENOBUFS 5
+#endif
 #endif
 
 #include "libtorrent/aux_/disable_warnings_pop.hpp"
diff --git a/src/enum_net.cpp b/src/enum_net.cpp
index ab5b85685..4bc176f27 100644
--- a/src/enum_net.cpp
+++ b/src/enum_net.cpp
@@ -92,6 +92,11 @@ POSSIBILITY OF SUCH DAMAGE.
 #include <stdlib.h>
 #include <unistd.h>
 #include <sys/types.h>
+
+#if TORRENT_ANDROID && !defined IFA_F_DADFAILED
+#define IFA_F_DADFAILED 8
+#endif
+
 #endif
 
 #if TORRENT_USE_IFADDRS