mbed-os/features/FEATURE_LWIP/lwip-interface/mbed_lib.json

{
    "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
        },
        "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-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
        }
    }
}