udp/tcp 비동기 통신은 현재 가능

impl/socket/udp_socket.cpp

@@ -4,4 +4,24 @@ namespace Network {
 
 int UDPSocket::init(int domain) { return init(domain, SOCK_DGRAM, 0); }
 
+int UDPSocket::connect(Address &serveraddr) {
+  std::string addr_string = serveraddr;
+  int retVal = -1;
+  if (serveraddr.family == AF_INET)
+    retVal = ::connect(sock, (const sockaddr *)&serveraddr.addr_in,
+                       serveraddr.length);
+  else
+    retVal = ::connect(sock, (const sockaddr *)&serveraddr.addr_in6,
+                       serveraddr.length);
+  memcpy(&remoteAddr, &serveraddr, sizeof(Address));
+  if (retVal == INVALID_SOCKET) {
+#ifdef _WIN32
+    int err = WSAGetLastError();
+    spdlog::error("connect() failed: WSA error {} (0x{:X})", err, err);
+#endif
+    spdlog::error("connect()");
+  }
+  return retVal;
+}
+
 }  // namespace Network