{
    "name": "lwip",
    "config": {
        "ipv4-enabled": {
            "help": "Enable IPv4",
            "value": true
        },
        "ipv6-enabled": {
            "help": "Enable IPv6",
            "value": false
        },
        "ip-ver-pref": {
            "help": "On dual-stack system the preferred stack: 4 for IPv4 and 6 for IPv6",
            "value": 4
        },
        "addr-timeout": {
            "help": "On dual-stack system how long to wait preferred stack's address in seconds",
            "value": 5
        },
        "ethernet-enabled": {
            "help": "Enable support for Ethernet interfaces",
            "value": true
        },
        "debug-enabled": {
            "help": "Enable debug trace support",
            "value": false
        },
        "ppp-enabled": {
            "help": "Enable support for PPP interfaces",
            "value": false,
            "macro_name": "NSAPI_PPP_AVAILABLE"
        },
        "use-mbed-trace": {
            "help": "Use mbed trace for debug, rather than printf",
            "value": false
        },
        "enable-ppp-trace": {
            "help": "Enable trace support for PPP interfaces",
            "value": false
        },
        "socket-max": {
            "help": "Maximum number of open TCPServer, TCPSocket and UDPSocket instances allowed, including one used internally for DNS.  Each requires 236 bytes of pre-allocated RAM",
            "value": 4
        },
        "tcp-enabled": {
            "help": "Enable TCP",
            "value": true
        },
        "tcp-server-max": {
            "help": "Maximum number of open TCPServer instances allowed.  Each requires 72 bytes of pre-allocated RAM",
            "value": 4
        },
        "tcp-socket-max": {
            "help": "Maximum number of open TCPSocket instances allowed.  Each requires 196 bytes of pre-allocated RAM",
            "value": 4
        },
        "udp-socket-max": {
            "help": "Maximum number of open UDPSocket instances allowed, including one used internally for DNS.  Each requires 84 bytes of pre-allocated RAM",
            "value": 4
        },
        "tcpip-thread-stacksize": {
            "help": "Stack size for lwip TCPIP thread",
            "value": 1200
        },
        "default-thread-stacksize": {
            "help": "Stack size for lwip system threads",
            "value": 512
        },
        "ppp-thread-stacksize": {
            "help": "Thread stack size for PPP",
            "value": 768
        }
    }
}