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FIX make network only read user-specified interfaces

This commit is contained in:
Nathan Dwarshuis 2021-07-18 01:17:45 -04:00
parent 031f9b9881
commit 7c34e08bc1
1 changed files with 33 additions and 38 deletions
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65
drawing/Network.lua
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@ -5,8 +5,8 @@ local Geometry = require 'Geometry'
return function(update_freq)
local PLOT_SEC_BREAK = 20
local PLOT_HEIGHT = 56
local INTERFACES = {'enp7s0f1', 'wlp0s20f3'}
local __string_gmatch = string.gmatch
local __math_floor = math.floor
-----------------------------------------------------------------------------
@ -60,50 +60,45 @@ return function(update_freq)
-----------------------------------------------------------------------------
-- update function
local INTERFACE_PATHS = {}
for i = 1, #INTERFACES do
local dir = string.format('/sys/class/net/%s/statistics/', INTERFACES[i])
INTERFACE_PATHS[i] = {
rx = dir..'rx_bytes',
tx = dir..'tx_bytes',
}
end
local get_bits = function(path)
return Util.read_file(path, nil, '*n') * 8
end
local interface_counters_tbl = {}
local read_interfaces = function()
local rx = 0
local tx = 0
for i = 1, #INTERFACE_PATHS do
local p = INTERFACE_PATHS[i]
rx = rx + get_bits(p.rx)
tx = tx + get_bits(p.tx)
end
return rx, tx
end
local prev_rx_bits, prev_tx_bits = read_interfaces()
local update = function(cr)
local dspeed, uspeed = 0, 0
local rx_delta, tx_delta
-- iterate through the route file and filter on interfaces that are gateways (flag = 0003)
local iterator = __string_gmatch(Util.read_file('/proc/net/route'),
'(%w+)%s+%w+%s+%w+%s+0003%s+')
for interface in iterator do
local interface_counters = interface_counters_tbl[interface]
if not interface_counters then
local rx_path = '/sys/class/net/'..interface..'/statistics/rx_bytes'
local tx_path = '/sys/class/net/'..interface..'/statistics/tx_bytes'
interface_counters = {
rx_path = rx_path,
tx_path = tx_path,
prev_rx_byte_cnt = get_bits(rx_path, nil, '*n'),
prev_tx_byte_cnt = get_bits(tx_path, nil, '*n'),
}
interface_counters_tbl[interface] = interface_counters
end
local rx_byte_cnt = get_bits(interface_counters.rx_path, nil, '*n')
local tx_byte_cnt = get_bits(interface_counters.tx_path, nil, '*n')
rx_delta = rx_byte_cnt - interface_counters.prev_rx_byte_cnt
tx_delta = tx_byte_cnt - interface_counters.prev_tx_byte_cnt
interface_counters.prev_rx_byte_cnt = rx_byte_cnt
interface_counters.prev_tx_byte_cnt = tx_byte_cnt
local rx_bits, tx_bits = read_interfaces()
-- mask overflow
if rx_delta > 0 then dspeed = dspeed + rx_delta * update_freq end
if tx_delta > 0 then uspeed = uspeed + tx_delta * update_freq end
if rx_bits > prev_rx_bits then
dspeed = (rx_bits - prev_rx_bits) * update_freq
end
if tx_bits > prev_tx_bits then
uspeed = (tx_bits - prev_tx_bits) * update_freq
end
prev_rx_bits = rx_bits
prev_tx_bits = tx_bits
Common.annotated_scale_plot_set(dnload, cr, dspeed)
Common.annotated_scale_plot_set(upload, cr, uspeed)