From f9183f5d025f8eac168c4f66d4b96992ff4dff28 Mon Sep 17 00:00:00 2001
From: compile_success <980965867@qq.com>
Date: Thu, 13 Oct 2022 08:54:40 +0000
Subject: [PATCH 1/3] fix mesg loss

---
 src/lstack/core/lstack_lwip.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/src/lstack/core/lstack_lwip.c b/src/lstack/core/lstack_lwip.c
index 4fbaed1..5ca0cc3 100644
--- a/src/lstack/core/lstack_lwip.c
+++ b/src/lstack/core/lstack_lwip.c
@@ -642,14 +642,10 @@ ssize_t read_stack_data(int32_t fd, void *buf, size_t len, int32_t flags)
         GAZELLE_RETURN(EINVAL);
     }
 
-    if (sock->errevent > 0) {
+    if (sock->errevent > 0 && !NETCONN_IS_DATAIN(sock)) {
         return 0;
     }
 
-    if (!NETCONN_IS_DATAIN(sock)) {
-        GAZELLE_RETURN(EAGAIN);
-    }
-
     while (recv_left > 0) {
         if (sock->recv_lastdata) {
             pbuf = sock->recv_lastdata;
-- 
2.23.0