upnp: expose interface configuration on UpnpInit2()

src/db/plugins/upnp/UpnpDatabasePlugin.cxx

@@ -155,7 +155,7 @@ UpnpDatabase::Create(EventLoop &, EventLoop &io_event_loop,
 void
 UpnpDatabase::Open()
 {
-	handle = UpnpClientGlobalInit();
+	handle = UpnpClientGlobalInit(nullptr);
 
 	discovery = new UPnPDeviceDirectory(event_loop, handle);
 	try {

src/lib/upnp/ClientInit.cxx

@@ -57,9 +57,9 @@ DoInit()
 }
 
 UpnpClient_Handle
-UpnpClientGlobalInit()
+UpnpClientGlobalInit(const char* iface)
 {
-	UpnpGlobalInit();
+	UpnpGlobalInit(iface);
 
 	try {
 		const std::lock_guard<Mutex> protect(upnp_client_init_mutex);

src/lib/upnp/ClientInit.hxx

@@ -23,7 +23,7 @@
 #include "Compat.hxx"
 
 UpnpClient_Handle
-UpnpClientGlobalInit();
+UpnpClientGlobalInit(const char* iface);
 
 void
 UpnpClientGlobalFinish() noexcept;

src/lib/upnp/Init.cxx

@@ -33,12 +33,13 @@ static Mutex upnp_init_mutex;
 static unsigned upnp_ref;
 
 static void
-DoInit()
+DoInit(const char* iface)
 {
+
 #ifdef UPNP_ENABLE_IPV6
-	auto code = UpnpInit2(nullptr, 0);
+	auto code = UpnpInit2(iface, 0);
 #else
-	auto code = UpnpInit(nullptr, 0);
+	auto code = UpnpInit(iface, 0);
 #endif
 	if (code != UPNP_E_SUCCESS)
 		throw FormatRuntimeError("UpnpInit() failed: %s",
@@ -53,12 +54,12 @@ DoInit()
 }
 
 void
-UpnpGlobalInit()
+UpnpGlobalInit(const char* iface)
 {
 	const std::lock_guard<Mutex> protect(upnp_init_mutex);
 
 	if (upnp_ref == 0)
-		DoInit();
+		DoInit(iface);
 
 	++upnp_ref;
 }

src/lib/upnp/Init.hxx

@@ -21,7 +21,7 @@
 #define MPD_UPNP_INIT_HXX
 
 void
-UpnpGlobalInit();
+UpnpGlobalInit(const char* iface);
 
 void
 UpnpGlobalFinish() noexcept;

src/neighbor/plugins/UpnpNeighborPlugin.cxx

@@ -74,7 +74,7 @@ private:
 void
 UpnpNeighborExplorer::Open()
 {
-	auto handle = UpnpClientGlobalInit();
+	auto handle = UpnpClientGlobalInit(nullptr);
 
 	discovery = new UPnPDeviceDirectory(event_loop, handle, this);