From 4c2de16a3e1fda932681d25ca243ecbdc39130d9 Mon Sep 17 00:00:00 2001
From: xiehan <52160700+Barenboim@users.noreply.github.com>
Date: Fri, 25 Jul 2025 21:31:52 +0800
Subject: [PATCH] Check 'SSL_ERROR_ZERO_RETURN' for a closed SSL connection.
 (#1762)

---
 src/kernel/poller.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/kernel/poller.c b/src/kernel/poller.c
index abe37795..6236d31f 100644
--- a/src/kernel/poller.c
+++ b/src/kernel/poller.c
@@ -453,10 +453,15 @@ static void __poller_handle_read(struct __poller_node *node,
 		else
 		{
 			nleft = SSL_read(node->data.ssl, p, POLLER_BUFSIZE);
-			if (nleft < 0)
+			if (nleft <= 0)
 			{
 				if (__poller_handle_ssl_error(node, nleft, poller) >= 0)
 					return;
+
+				if (errno == -SSL_ERROR_ZERO_RETURN)
+					nleft = 0;
+				else
+					nleft = -1;
 			}
 		}