From 7e748956e618050a4c7ed13c684f1112ca4d2645 Mon Sep 17 00:00:00 2001
From: Tim Niederhausen <tim@rnc-ag.de>
Date: Tue, 3 Oct 2017 22:11:42 +0200
Subject: [PATCH] Provide a default ip_change_notifier implementation

Right now, compiling fails if there's no ip_change_notifier for the
current platform.
---
 src/ip_notifier.cpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/ip_notifier.cpp b/src/ip_notifier.cpp
index bdc8b2dfa..eb7e2081e 100644
--- a/src/ip_notifier.cpp
+++ b/src/ip_notifier.cpp
@@ -376,6 +376,23 @@ private:
 	OVERLAPPED m_ovl = {};
 	boost::asio::windows::object_handle m_hnd;
 };
+#else
+struct ip_change_notifier_impl final : ip_change_notifier
+{
+	explicit ip_change_notifier_impl(io_service& ios)
+		: m_ios(ios) {}
+
+	void async_wait(std::function<void(error_code const&)> cb) override
+	{
+		m_ios.post([cb]()
+		{ cb(make_error_code(boost::system::errc::not_supported)); });
+	}
+
+	void cancel() override {}
+
+private:
+	io_service& m_ios;
+};
 #endif
 
 } // anonymous namespace