From 09b6974ae99e9855b8622dba11b73594467226cc Mon Sep 17 00:00:00 2001
From: David Garske <david@wolfssl.com>
Date: Fri, 24 Nov 2023 09:30:09 -0800
Subject: [PATCH] Fix for TLS v1.3 in non-blocking loosing return code from
 `SendBuffered`. Example: SendBuffered returns WANT_WRITE (-327) and sets
 ssl->error, then below it was doing `ssl->error = ret` where ret = 0.

---
 src/tls13.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tls13.c b/src/tls13.c
index ac24dda0e..738e9c1d0 100644
--- a/src/tls13.c
+++ b/src/tls13.c
@@ -11954,7 +11954,7 @@ int wolfSSL_connect_TLSv13(WOLFSSL* ssl)
         && ssl->error != WC_PENDING_E
     #endif
     ) {
-        if ((ssl->error = SendBuffered(ssl)) == 0) {
+        if ((ret = SendBuffered(ssl)) == 0) {
             if (ssl->fragOffset == 0 && !ssl->options.buildingMsg) {
                 if (advanceState) {
 #ifdef WOLFSSL_DTLS13