이대로 제출해버릴까..

impl/socket/socket.cpp

@@ -2,6 +2,10 @@
 
 namespace Network {
 
+Socket::Socket() {
+  init(AF_INET, SOCK_STREAM, 0);
+}
+
 Socket::Socket(int domain, int type, int protocol) {
   init(domain, type, protocol);
 }
@@ -61,6 +65,8 @@ int Socket::bind(Address __addr) {
   bindAddr = __addr;
   int retVal = ::bind(sock, &__addr.addr, __addr.length);
   if (retVal == INVALID_SOCKET) {
+    int err = WSAGetLastError();
+    spdlog::error("bind() failed: WSA error {} (0x{:X})", err, err);
     spdlog::critical("bind()");
     std::exit(EXIT_FAILURE);
   }