From 2ec7838967aec9d43d44c2d53377e827d6fcf041 Mon Sep 17 00:00:00 2001
From: Damien George <damien.p.george@gmail.com>
Date: Wed, 27 Mar 2019 16:00:25 +1100
Subject: [PATCH] extmod/modlwip: Handle case of accept callback called with
null PCB.
---
extmod/modlwip.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/extmod/modlwip.c b/extmod/modlwip.c
index d1359a2aa..6960546f6 100644
--- a/extmod/modlwip.c
+++ b/extmod/modlwip.c
@@ -429,6 +429,11 @@ STATIC err_t _lwip_tcp_accept_finished(void *arg, struct tcp_pcb *pcb)
// Callback for incoming tcp connections.
STATIC err_t _lwip_tcp_accept(void *arg, struct tcp_pcb *newpcb, err_t err) {
+ // err can be ERR_MEM to notify us that there was no memory for an incoming connection
+ if (err != ERR_OK) {
+ return ERR_OK;
+ }
+
lwip_socket_obj_t *socket = (lwip_socket_obj_t*)arg;
tcp_recv(newpcb, _lwip_tcp_recv_unaccepted);
--
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