esp-idf/components/tcpip_adapter/Kconfig

menu "TCP/IP Adapter"

    config IP_LOST_TIMER_INTERVAL
        int "IP Address lost timer interval (seconds)"
        range 0 65535
        default 120
        help
            The value of 0 indicates the IP lost timer is disabled, otherwise the timer is enabled.

            The IP address may be lost because of some reasons, e.g. when the station disconnects
            from soft-AP, or when DHCP IP renew fails etc. If the IP lost timer is enabled, it will
            be started everytime the IP is lost. Event SYSTEM_EVENT_STA_LOST_IP will be raised if
            the timer expires. The IP lost timer is stopped if the station get the IP again before
            the timer expires.

    choice USE_TCPIP_STACK_LIB
        prompt "TCP/IP Stack Library"
        default TCPIP_LWIP
        help
            Choose the TCP/IP Stack to work, for example, LwIP, uIP, etc.
        config TCPIP_LWIP
            bool "LwIP"
            help
                lwIP is a small independent implementation of the TCP/IP protocol suite.
    endchoice

endmenu