local ethtool = util.exec('ethtool -S bat0')

local fields = {}
for k, v in ethtool:gmatch('([%a_]+): ([0-9]+)') do
	fields[k] = tonumber(v)
end

local traffic = {}
for _, class in ipairs({'rx', 'tx', 'forward', 'mgmt_rx', 'mgmt_tx'}) do
	traffic[class] =
		{ bytes = fields[class .. '_bytes']
		, packets = fields[class]
		}
end
traffic['tx']['dropped'] = fields['tx_dropped']

return traffic