rt-thread/components/net/sal/Kconfig

menuconfig RT_USING_SAL
    bool "SAL: socket abstraction layer"
    select RT_USING_NETDEV
    select RT_USING_SYSTEM_WORKQUEUE
    default n

if RT_USING_SAL

    config SAL_INTERNET_CHECK
        bool "Enable the ability that check internet status"
        default y
        help
            The ability that check internet status is provided by RT-Thread.

    if RT_USING_LWIP || AT_USING_SOCKET

        menu "protocol stack implement"

            config SAL_USING_LWIP
                bool "Support lwIP stack"
                default y
                depends on RT_USING_LWIP

            config SAL_USING_AT
                bool "Support AT Commands stack"
                default y
                depends on AT_USING_SOCKET

            config SAL_USING_TLS
                bool "Support MbedTLS protocol"
                default y
                depends on PKG_USING_MBEDTLS
        endmenu

    endif

    config SAL_USING_POSIX
        bool
        depends on DFS_USING_POSIX
        default y
        help
            Enable BSD socket operated by file system API
            Let BSD socket operated by file system API, such as read/write and involveed in select/poll POSIX APIs.

    config SAL_SOCKETS_NUM
        int "the maximum number of sockets"
        depends on !SAL_USING_POSIX
        default 16

endif