Initial commit (code only without large binaries)

EdgeNode/internal/nodes/client_conn_utils.go

@@ -0,0 +1,20 @@
+// Copyright 2021 Liuxiangchao iwind.liu@gmail.com. All rights reserved.
+
+package nodes
+
+import (
+	"net"
+)
+
+// 判断客户端连接是否已关闭
+func isClientConnClosed(conn net.Conn) bool {
+	if conn == nil {
+		return true
+	}
+	clientConn, ok := conn.(ClientConnInterface)
+	if ok {
+		return clientConn.IsClosed()
+	}
+
+	return true
+}