From d050c33133e62bf0a9a7584878cf5e7780f226b7 Mon Sep 17 00:00:00 2001
From: David Cermak <cermak@espressif.com>
Date: Tue, 29 Dec 2020 21:35:25 +0100
Subject: [PATCH] tcp_in: Flag the pcb as closing if TCP_EVENT_CLOSED refused

Closes https://github.com/espressif/esp-lwip/issues/18
---
 src/core/tcp_in.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/core/tcp_in.c b/src/core/tcp_in.c
index 8097bd46..b25027bf 100644
--- a/src/core/tcp_in.c
+++ b/src/core/tcp_in.c
@@ -541,6 +541,10 @@ tcp_input(struct pbuf *p, struct netif *inp)
             TCP_EVENT_CLOSED(pcb, err);
             if (err == ERR_ABRT) {
               goto aborted;
+#if ESP_LWIP
+            } else if (err == ERR_MEM) {
+                tcp_set_flags(pcb, TF_CLOSEPEND);
+#endif /* ESP_LWIP */
             }
           }
         }