From 3438e800608cc43abab2af8d239fef0d9a187df2 Mon Sep 17 00:00:00 2001
From: iabdalkader <i.abdalkader@gmail.com>
Date: Sat, 14 May 2022 14:30:15 +0200
Subject: [PATCH] extmod/modusocket: Add support for socket events callback.

Add support for the special sockopt 20.
---
 extmod/modusocket.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/extmod/modusocket.c b/extmod/modusocket.c
index 429750bf80..cedb2cc9a9 100644
--- a/extmod/modusocket.c
+++ b/extmod/modusocket.c
@@ -331,6 +331,12 @@ STATIC mp_obj_t socket_setsockopt(size_t n_args, const mp_obj_t *args) {
         val = mp_obj_get_int_truncated(args[3]);
         optval = &val;
         optlen = sizeof(val);
+    } else if (opt == 20 && args[3] == mp_const_none) {
+        optval = MP_OBJ_NULL;
+        optlen = 0;
+    } else if (opt == 20 && mp_obj_is_callable(args[3])) {
+        optval = args[3];
+        optlen = sizeof(optval);
     } else {
         mp_buffer_info_t bufinfo;
         mp_get_buffer_raise(args[3], &bufinfo, MP_BUFFER_READ);