From 7a4136f8b5aa78912922ac546df6daed7907e9ec Mon Sep 17 00:00:00 2001
From: Aleksandr Krotov <san.crot@yandex.ru>
Date: Mon, 11 Nov 2024 09:51:52 +0300
Subject: [PATCH] fix: flush local-tun tcp writer half before close (#1759)

---
 crates/shadowsocks-service/src/local/tun/tcp.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crates/shadowsocks-service/src/local/tun/tcp.rs b/crates/shadowsocks-service/src/local/tun/tcp.rs
index 0e07230d..b5b22d9f 100644
--- a/crates/shadowsocks-service/src/local/tun/tcp.rs
+++ b/crates/shadowsocks-service/src/local/tun/tcp.rs
@@ -357,7 +357,7 @@ impl TcpTun {
                             }
 
                             // SHUT_WR
-                            if matches!(control.send_state, TcpSocketState::Close) {
+                            if matches!(control.send_state, TcpSocketState::Close) && socket.send_queue() == 0 && control.send_buffer.is_empty() {
                                 trace!("closing TCP Write Half, {:?}", socket.state());
 
                                 // Close the socket. Set to FIN state