-- dhcp api
function renew()
    os.run({}, "/boot/network/dhcp.sys")
end
function register(name)
    expect(1,name,"string")
    os.run({}, "/etc/auth-client/dhcpregister.sys", name)
end
function unregister()
    os.run({}, "/etc/auth-client/dhcpunregister.sys")
end
function lookup(name)
    expect(1,name,"string")
    os.run({}, "/etc/auth-client/dhcplookup.sys" , name)
end
-- end auth api's
