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# shellcheck shell=bash
# no need for shebang - this file is loaded from charts.d.plugin
# SPDX-License-Identifier: GPL-3.0-or-later
# netdata
# real-time performance and health monitoring, done right!
# (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
#
# _update_every is a special variable - it holds the number of seconds
# between the calls of the _update() function
ap_update_every=
ap_priority=6900
declare -A ap_devs=()
# _check is called once, to find out if this chart should be enabled or not
ap_check() {
require_cmd iw || return 1
local ev
ev=$(run iw dev | awk '
BEGIN {
i = "";
ssid = "";
ap = 0;
}
/^[ \t]+Interface / {
if( ap == 1 ) {
print "ap_devs[" i "]=\"" ssid "\""
}
i = $2;
ssid = "";
ap = 0;
}
/^[ \t]+ssid / { ssid = $2; }
/^[ \t]+type AP$/ { ap = 1; }
END {
if( ap == 1 ) {
print "ap_devs[" i "]=\"" ssid "\""
}
}
')
eval "${ev}"
# this should return:
# - 0 to enable the chart
# - 1 to disable the chart
[ ${#ap_devs[@]} -gt 0 ] && return 0
error "no devices found in AP mode, with 'iw dev'"
return 1
}
# _create is called once, to create the charts
ap_create() {
local ssid dev
for dev in "${!ap_devs[@]}"; do
ssid="${ap_devs[${dev}]}"
# create the chart with 3 dimensions
cat << EOF
CHART ap_clients.${dev} '' "Connected clients to ${ssid} on ${dev}" "clients" ${dev} ap.clients line $((ap_priority + 1)) $ap_update_every '' '' 'ap'
DIMENSION clients '' absolute 1 1
CHART ap_bandwidth.${dev} '' "Bandwidth for ${ssid} on ${dev}" "kilobits/s" ${dev} ap.net area $((ap_priority + 2)) $ap_update_every '' '' 'ap'
DIMENSION received '' incremental 8 1024
DIMENSION sent '' incremental -8 1024
CHART ap_packets.${dev} '' "Packets for ${ssid} on ${dev}" "packets/s" ${dev} ap.packets line $((ap_priority + 3)) $ap_update_every '' '' 'ap'
DIMENSION received '' incremental 1 1
DIMENSION sent '' incremental -1 1
CHART ap_issues.${dev} '' "Transmit Issues for ${ssid} on ${dev}" "issues/s" ${dev} ap.issues line $((ap_priority + 4)) $ap_update_every '' '' 'ap'
DIMENSION retries 'tx retries' incremental 1 1
DIMENSION failures 'tx failures' incremental -1 1
CHART ap_signal.${dev} '' "Average Signal for ${ssid} on ${dev}" "dBm" ${dev} ap.signal line $((ap_priority + 5)) $ap_update_every '' '' 'ap'
DIMENSION signal 'average signal' absolute 1 1000
CHART ap_bitrate.${dev} '' "Bitrate for ${ssid} on ${dev}" "Mbps" ${dev} ap.bitrate line $((ap_priority + 6)) $ap_update_every '' '' 'ap'
DIMENSION receive '' absolute 1 1000
DIMENSION transmit '' absolute -1 1000
DIMENSION expected 'expected throughput' absolute 1 1000
EOF
done
return 0
}
# _update is called continuously, to collect the values
ap_update() {
# the first argument to this function is the microseconds since last update
# pass this parameter to the BEGIN statement (see below).
# do all the work to collect / calculate the values
# for each dimension
# remember: KEEP IT SIMPLE AND SHORT
for dev in "${!ap_devs[@]}"; do
echo
echo "DEVICE ${dev}"
iw "${dev}" station dump
done | awk '
function zero_data() {
dev = "";
c = 0;
rb = 0;
tb = 0;
rp = 0;
tp = 0;
tr = 0;
tf = 0;
tt = 0;
rt = 0;
s = 0;
g = 0;
e = 0;
}
function print_device() {
if(dev != "" && length(dev) > 0) {
print "BEGIN ap_clients." dev;
print "SET clients = " c;
print "END";
print "BEGIN ap_bandwidth." dev;
print "SET received = " rb;
print "SET sent = " tb;
print "END";
print "BEGIN ap_packets." dev;
print "SET received = " rp;
print "SET sent = " tp;
print "END";
print "BEGIN ap_issues." dev;
print "SET retries = " tr;
print "SET failures = " tf;
print "END";
if( c == 0 ) c = 1;
print "BEGIN ap_signal." dev;
print "SET signal = " int(s / c);
print "END";
print "BEGIN ap_bitrate." dev;
print "SET receive = " int(rt / c);
print "SET transmit = " int(tt / c);
print "SET expected = " int(e / c);
print "END";
}
zero_data();
}
BEGIN {
zero_data();
}
/^DEVICE / {
print_device();
dev = $2;
}
/^Station/ { c++; }
/^[ \t]+rx bytes:/ { rb += $3; }
/^[ \t]+tx bytes:/ { tb += $3; }
/^[ \t]+rx packets:/ { rp += $3; }
/^[ \t]+tx packets:/ { tp += $3; }
/^[ \t]+tx retries:/ { tr += $3; }
/^[ \t]+tx failed:/ { tf += $3; }
/^[ \t]+signal:/ { x = $2; s += x * 1000; }
/^[ \t]+rx bitrate:/ { x = $3; rt += x * 1000; }
/^[ \t]+tx bitrate:/ { x = $3; tt += x * 1000; }
/^[ \t]+expected throughput:(.*)Mbps/ {
x=$3;
sub(/Mbps/, "", x);
e += x * 1000;
}
END {
print_device();
}
'
return 0
}
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