From 51c51d49ade16cf3ce7c7e690ece930e3d52ae2d Mon Sep 17 00:00:00 2001
From: "Sergio R. Caprile" <scaprile@cesanta.com>
Date: Wed, 19 Oct 2022 11:56:03 -0300
Subject: [PATCH] Fix unintended socket close on systems with valid fd=0
 descriptor numbering

---
 mongoose.c | 1 +
 src/net.c  | 1 +
 2 files changed, 2 insertions(+)

diff --git a/mongoose.c b/mongoose.c
index e80c7fcb..bf1fda09 100644
--- a/mongoose.c
+++ b/mongoose.c
@@ -3432,6 +3432,7 @@ struct mg_connection *mg_connect(struct mg_mgr *mgr, const char *url,
   } else {
     LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c);
     c->is_udp = (strncmp(url, "udp:", 4) == 0);
+    c->fd = (void *) (size_t) -1;  // Set to INVALID_SOCKET
     c->fn = fn;
     c->is_client = true;
     c->fn_data = fn_data;
diff --git a/src/net.c b/src/net.c
index c6c500f0..c0a9e5fe 100644
--- a/src/net.c
+++ b/src/net.c
@@ -174,6 +174,7 @@ struct mg_connection *mg_connect(struct mg_mgr *mgr, const char *url,
   } else {
     LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c);
     c->is_udp = (strncmp(url, "udp:", 4) == 0);
+    c->fd = (void *) (size_t) -1;  // Set to INVALID_SOCKET
     c->fn = fn;
     c->is_client = true;
     c->fn_data = fn_data;