TCP server connection timeout (loopback_tcps example)

Hello everyone,
i’m working with the w5500 chip and stm32F207, and i try to make a tcp server loopback application from the loopback example provided by WIZnet .

the other two functions work fine (loopback_tcpc for tcp client and loopback_udps for UDP).

when i debugged the code the listen API in socket.c returns SOCK_OK, i’m not sure about the accept ( the TCP server accepts the TCP client request) i kow there’s no accept API (not like berkely socket APIs).

how can check that, because i think that SOCK_OK returned from the listen API only when the socket enters the listen mode.

Ps: my TCP client return “TCP connection timeout”