직렬화 함수 작성 끝

impl/socket/socket.cpp

@@ -41,7 +41,7 @@ Socket::operator SOCKET() {
 
 void Socket::set(const SOCKET __sock, int __domain) {
   if (__sock == INVALID_SOCKET) {
-    spdlog::critical("socket()");
+    spdlog::error("set failed errno:{} {}", errno, strerror(errno));
     std::exit(EXIT_FAILURE);
   }