From 154cbc868adbd8dea05b4d78969f3b2e6a039463 Mon Sep 17 00:00:00 2001
From: Quella <quella@noreply.localhost>
Date: Wed, 15 Oct 2025 12:53:16 +0800
Subject: [PATCH] =?UTF-8?q?=E6=9B=B4=E6=96=B0=20src/Netra.cpp?=
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---
 src/Netra.cpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/Netra.cpp b/src/Netra.cpp
index 1deba5b..19e5f2e 100644
--- a/src/Netra.cpp
+++ b/src/Netra.cpp
@@ -185,6 +185,21 @@ namespace QCL
         }
     }
 
+    bool TcpServer::isClientDisconnected(int clientSock)
+    {
+        char tmp;
+        ssize_t n = recv(clientSock, &tmp, 1, MSG_PEEK | MSG_DONTWAIT);
+        if (n == 0)
+            return true; // 对端有序关闭
+        if (n < 0)
+        {
+            if (errno == EAGAIN || errno == EWOULDBLOCK)
+                return false; // 只是暂时无数据
+            return true;      // 其它错误视为断开
+        }
+        return false; // 有数据可读
+    }
+
     /**
      * @brief 获取当前所有客户端Socket副本（线程安全）
      * @return 包含所有客户端socket的vector副本