From a7ef50636ef1f59b5e65f1c769bd5d1208457b4c Mon Sep 17 00:00:00 2001
From: Martine Lenders <m.lenders@fu-berlin.de>
Date: Fri, 21 Feb 2020 20:12:22 +0100
Subject: [PATCH] lwip: activate TCP_LISTEN_BACKLOG per default with `sock_tcp`

Prevents unnecessary usage of resources, as the queue of `sock_tcp` is
restricted.
---
 pkg/lwip/include/lwipopts.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/pkg/lwip/include/lwipopts.h b/pkg/lwip/include/lwipopts.h
index b6808383b9..f8a8d1ef2d 100644
--- a/pkg/lwip/include/lwipopts.h
+++ b/pkg/lwip/include/lwipopts.h
@@ -134,6 +134,14 @@ extern "C" {
 #define LWIP_NETCONN            (0)
 #endif
 
+#ifndef TCP_LISTEN_BACKLOG
+# if defined(MODULE_LWIP_SOCK_TCP)
+# define TCP_LISTEN_BACKLOG     (1)
+# else
+# define TCP_LISTEN_BACKLOG     (0)
+# endif
+#endif /* TCP_LISTEN_BACKLOG */
+
 #define LWIP_SOCKET             (0)
 
 #define LWIP_DONT_PROVIDE_BYTEORDER_FUNCTIONS