esp-idf/examples/protocols/sockets/tcp_client_multi_net/main/Kconfig.projbuild

menu "Example Configuration"

    config EXAMPLE_HOST_NAME
        string "Host Name"
        default "baidu.com"
        help
            host name

    config EXAMPLE_HOST_PORT
        int "Host Port"
        default 80
        range 0 65535
        help
            host port

    config EXAMPLE_BIND_SOCKET_TO_NETIF_NAME
        bool "Bind to interface by its name"
        default y
        help
            By default example uses setsockopt() to bind the tcp-client's socket
            to specific interface. Setting this option to true demonstrates binding
            the socket to the local ip address of the network interface.

endmenu