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Merge pull request #663 from sumpfralle/network-wifi-occupation
new network plugin added: wireless_channel_occupation
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commit
6cf51e58f2
1 changed files with 105 additions and 0 deletions
105
plugins/network/wireless_channel_occupation_
Executable file
105
plugins/network/wireless_channel_occupation_
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#!/bin/sh
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#
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# Monitor the wifi channel occupation (taken from "iw dev wlan0 survey dump").
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#
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# Symlink this plugin with the name of the wifi interface added (e.g. "wlan0").
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#
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#
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# Copyright (C) 2015 Lars Kruse <devel@sumpfralle.de>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# Magic markers
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#%# capabilities=autoconf suggest
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#%# family=auto
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set -eu
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SCRIPT_PREFIX="wireless_channel_occupation_"
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clean_fieldname() {
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echo "$1" | sed 's/^\([^A-Za-z_]\)/_\1/; s/[^A-Za-z0-9_]/_/g'
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}
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get_wifi_devices() {
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iw dev | grep Interface | awk '{print $2}'
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}
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get_wifi_device_from_suffix() {
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local suffix
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local called
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called=$(basename "$0")
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suffix="${called#$SCRIPT_PREFIX}"
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# empty result if the prefix did not match (and was not removed)
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[ "$suffix" = "$0" ] && echo "" || echo "$suffix"
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}
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if [ "${1:-}" = "autoconf" ]; then
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if which iw 2>/dev/null; then
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if [ -n "$(get_wifi_devices)" ]; then
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echo "yes"
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else
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echo "no (missing wifi devices)"
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fi
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else
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echo "no (missing 'iw' dependency)"
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fi
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elif [ "${1:-}" = "suggest" ]; then
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get_wifi_devices
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elif [ "${1:-}" = "config" ]; then
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device=$(get_wifi_device_from_suffix)
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[ -z "$device" ] && echo >&2 "Invalid wifi device name given" && exit 1
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echo "graph_title Channel Occupation of $device"
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echo "graph_vlabel %"
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echo "graph_category wireless"
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echo "graph_args --base 1000 -r --lower-limit 0 --upper-limit 100"
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dev_field=$(clean_fieldname "$device")
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# active: listening time on this channel (usually: 5 minutes = 300000ms)
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echo "${dev_field}_active.label Transmit"
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echo "${dev_field}_active.type DERIVE"
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echo "${dev_field}_active.graph no"
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# busy = receive + transmit + unknown
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echo "${dev_field}_busy.label unknown"
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echo "${dev_field}_busy.type DERIVE"
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echo "${dev_field}_busy.draw AREA"
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echo "${dev_field}_busy.cdef 100,1,${dev_field}_active,${dev_field}_busy,${dev_field}_receive,${dev_field}_transmit,+,-,/,/,*"
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# receive: this radio receives traffic for itself
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echo "${dev_field}_receive.label Receive"
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echo "${dev_field}_receive.type DERIVE"
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echo "${dev_field}_receive.draw STACK"
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echo "${dev_field}_receive.cdef 100,${dev_field}_receive,${dev_field}_active,/,*"
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# transmit: this radio transmits traffic
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echo "${dev_field}_transmit.label Transmit"
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echo "${dev_field}_transmit.type DERIVE"
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echo "${dev_field}_transmit.draw STACK"
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echo "${dev_field}_transmit.cdef 100,${dev_field}_transmit,${dev_field}_active,/,*"
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else
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device=$(get_wifi_device_from_suffix)
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[ -z "$device" ] && echo >&2 "Invalid wifi device name given" && exit 1
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iw dev "$device" survey dump \
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| grep -F -A 5 "[in use]" \
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| grep -E "channel (busy|receive|transmit|active) time:" \
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| awk '{print "'${device}_'"$2"'.value'",$4}'
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fi
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exit 0
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