Add 'bufferbloat.sh'
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bufferbloat.sh
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212
bufferbloat.sh
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#!/bin/sh
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# Display bandwidth for our WAN interface, measure for 10 Seconds, then it quits:
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# Relevent line: Total Send Rate -> Last 10 Seconds
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# Relevant line: Total receive rate -> Last 10 Seconds
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#iftop -i igb0 -n -N -b -t -p -s 10
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# Get DL bw last 10 seconds
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# iftop -i igb0 -n -N -b -t -p -s 10 | grep "Total receive rate" | xargs echo | cut -d " " -f5
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# Get DL bw last 2 seconds
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# iftop -i igb0 -n -N -b -t -p -s 10 | grep "Total receive rate" | xargs echo | cut -d " " -f4
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# Get the average ping to 1.1.1.1 in ms
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#ping -t 10 -q 1.1.1.1 | cut -d "/" -s -f5
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# Idea: If average ping is >200ms, reduce current download bandwidth by 10%
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# Repeat until ping is OK or lower limit reached
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# If average Ping <50ms -> Increase Bandwidth by 10% until upper limit reached
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# maximum allowed ping in ms
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pingMax=200
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# optimal ping in ms
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pingOpt=50
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# maximum possible download bandwidth in Mbit/s
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downloadBWMax=80
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downloadBWMaxBits=$(units -o "%0.f" -t "${downloadBWMax} megabit" "bits")
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# minimum allowed Download Bandwidth
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downloadBWMin=5
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downloadBWMinBits=$(units -o "%0.f" -t "${downloadBWMin} megabit" "bits")
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# downloadPipe as in opnsense: ipfw pipe show
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downloadPipe=10000
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uploadPipe=10001
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# maxmimum possible upload bandwidth in Mbit/s
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uploadBWMax=20
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uploadBWMaxBits=$(units -o "%0.f" -t "${uploadBWMax} megabit" "bits")
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# minimum allowed upload Bandwidth
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uploadBWMin=2
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uploadBWMinBits=$(units -o "%0.f" -t "${uploadBWMin} megabit" "bits")
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# private vars
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avgping=1
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avgDownloadBW10sInBits=1
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avgUploadBW10sInBits=1
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resetDownloadBandwidth() {
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# resets the Download Bandwith to the maximum value
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echo "Resetting download bandwith limit to $downloadBWMax MBit/s"
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ipfw pipe "$downloadPipe" config bw "${downloadBWMax}Mbit"
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}
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resetUploadBandwidth() {
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# resets the Upload Bandwith to the maximum value
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echo "Resetting upload bandwith limit to $uploadBWMax MBit/s"
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ipfw pipe "$uploadPipe" config bw "${uploadBWMax}Mbit"
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}
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decreaseDownloadBandwidth() {
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# currently used Bandwidth limit in Mbit/s
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currentBW=$(ipfw pipe show | grep "${downloadPipe}:" | xargs echo | cut -d " " -f2)
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currentBWInBits=$(units -o "%0.f" -t "${currentBW} megabit" "bits")
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echo "The current download BW limit in bits is $currentBWInBits and in Mbit/s $currentBW "
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# decrease current average Bandwidth by 10%
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# newBW=$(echo "$avgDownloadBW10sInBits * 0.9" | bc)
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# decrease currently set Bandwidth by 10%
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newBW=$(echo "$currentBWInBits * 0.9" | bc)
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newBWMbit=$(units -o "%0.f" -t "${newBW} bits" "megabit")
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echo "The average BW in the last 10s was $avgDownloadBW10s new BW would be $newBWMbit Mbit/s"
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if [ 1 -eq "$(echo "${newBW} < ${downloadBWMinBits}" | bc)" ]
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then
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echo "Setting current Download Bandwidth to the minimum allowed Bandwidth $downloadBWMin"
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ipfw pipe "$downloadPipe" config bw "${downloadBWMin}Mbit"
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else
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echo "Decreasing current avg Download Bandwidth by 10%, setting it to $newBW Bits/s"
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echo "Decreasing current avg Download Bandwidth by 10%, setting it to $newBWMbit MBit/s"
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ipfw pipe "$downloadPipe" config bw "${newBWMbit}Mbit"
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fi
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}
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decreaseUploadBandwidth() {
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# currently used Bandwidth limit in Mbit/s
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currentBW=$(ipfw pipe show | grep "${uploadPipe}:" | xargs echo | cut -d " " -f2)
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currentBWInBits=$(units -o "%0.f" -t "${currentBW} megabit" "bits")
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echo "The current upload BW limit in bits is $currentBWInBits and in Mbit/s $currentBW "
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# decrease current average Bandwidth by 10%
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# newBW=$(echo "$avgUploadBW10sInBits * 0.9" | bc)
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# decrease currently set Bandwidth by 10%
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newBW=$(echo "$currentBWInBits * 0.9" | bc)
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newBWMbit=$(units -o "%0.f" -t "${newBW} bits" "megabit")
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echo "The average BW in the last 10s was $avgUploadBW10sInBits new BW would be $newBWMbit Mbit/s"
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if [ 1 -eq "$(echo "${newBW} < ${uploadBWMinBits}" | bc)" ]
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then
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echo "Setting current Upload Bandwidth to the minimum allowed Bandwidth $uploadBWMin"
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ipfw pipe "$uploadPipe" config bw "${uploadBWMin}Mbit"
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else
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echo "Decreasing current avg Upload Bandwidth by 10%, setting it to $newBW Bits/s"
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echo "Decreasing current avg Upload Bandwidth by 10%, setting it to $newBWMbit MBit/s"
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ipfw pipe "$uploadPipe" config bw "${newBWMbit}Mbit"
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fi
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}
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increaseDownloadBandwidth() {
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# currently used Bandwidth limit in Mbit/s
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currentBW=$(ipfw pipe show | grep "${downloadPipe}:" | xargs echo | cut -d " " -f2)
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currentBWInBits=$(units -o "%0.f" -t "${currentBW} megabit" "bits")
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echo "The current download BW in bits is $currentBWInBits and in Mbit/s $currentBW "
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# increase current average Bandwidth by 10%
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# newBW=$(echo "$avgDownloadBW10sInBits * 1.1" | bc)
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# increase currently set Bandwidth by 10%
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newBW=$(echo "$currentBWInBits * 1.1" | bc)
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newBWMbit=$(units -o "%0.f" -t "${newBW} bits" "megabit")
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echo "The average BW in the last 10s was $avgDownloadBW10s new BW would be $newBWMbit Mbit/s"
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if [ 1 -eq "$(echo "${newBW} > ${downloadBWMaxBits}" | bc)" ]
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then
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echo "Setting current Download Bandwidth to the maximum allowed Bandwidth $downloadBWMax"
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ipfw pipe "$downloadPipe" config bw "${downloadBWMax}Mbit"
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else
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echo "Increasing current avg Download Bandwidth by 10%, setting it to $newBW Bits/s"
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echo "Increasing current avg Download Bandwidth by 10%, setting it to $newBWMbit MBit/s"
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ipfw pipe "$downloadPipe" config bw "${newBWMbit}Mbit"
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fi
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}
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increaseUploadBandwidth() {
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# currently used Bandwidth limit in Mbit/s
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currentBW=$(ipfw pipe show | grep "${uploadPipe}:" | xargs echo | cut -d " " -f2)
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currentBWInBits=$(units -o "%0.f" -t "${currentBW} megabit" "bits")
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echo "The current upload BW in bits is $currentBWInBits and in Mbit/s $currentBW "
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# increase current average Bandwidth by 10%
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# newBW=$(echo "$avgUploadBW10sInBits * 1.1" | bc)
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# increase currently set Bandwidth by 10%
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newBW=$(echo "$currentBWInBits * 1.1" | bc)
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newBWMbit=$(units -o "%0.f" -t "${newBW} bits" "megabit")
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if [ 1 -eq "$(echo "${newBWMbit} == ${currentBW}" | bc)" ]
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then
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echo "Forcing increment by 1MBit"
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newBWMbit=$(echo "${newBWMbit} + 1" | bc)
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fi
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echo "The average upload BW in the last 10s was $avgUploadBW10sInBits new BW would be $newBWMbit Mbit/s"
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if [ 1 -eq "$(echo "${newBW} > ${uploadBWMaxBits}" | bc)" ]
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then
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echo "Setting current Upload Bandwidth to the maximum allowed Bandwidth $uploadBWMax"
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ipfw pipe "$uploadPipe" config bw "${uploadBWMax}Mbit"
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else
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echo "Increasing current avg Upload Bandwidth by 10%, setting it to $newBW Bits/s"
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echo "Increasing current avg Upload Bandwidth by 10%, setting it to $newBWMbit MBit/s"
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ipfw pipe "$uploadPipe" config bw "${newBWMbit}Mbit"
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fi
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}
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while true
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do
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echo "Pinging vps02 for average latency"
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avgping=$(ping -t 10 -q 51.254.48.251 | cut -d "/" -s -f5)
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echo "Average ping is $avgping"
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#bwLast10s=$(iftop -i igb0 -n -N -b -t -p -s 10)
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#avgDownloadBW10s=$(echo "$bwLast10s" | grep "Total receive rate" | xargs echo | cut -d " " -f5)
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#avgUploadBW10s=$(echo "$bwLast10s" | grep "Total send rate" | xargs echo | cut -d " " -f5)
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#echo "The average Download in the last 10 seconds is $avgDownloadBW10s"
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#echo "The average Upload in the last 10 seconds is $avgUploadBW10s"
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#avgDownloadBW10s=$(echo "$avgDownloadBW10s"| sed "s/B/ bit/g" | sed "s/Kb/ kilobit/g" | sed "s/Mb/ megabit/g" | sed "s/Gb/ gigabit/g")
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#avgUploadBW10s=$(echo "$avgUploadBW10s"| sed "s/B/ bit/g" | sed "s/Kb/ kilobit/g" | sed "s/Mb/ megabit/g" | sed "s/Gb/ gigabit/g")
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#echo "The average Download in the last 10 seconds is $avgDownloadBW10s"
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#echo "The average Upload in the last 10 seconds is $avgUploadBW10s"
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#avgDownloadBW10sInBits=$(units -o "%0.f" -t "$avgDownloadBW10s" "bits")
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#avgUploadBW10sInBits=$(units -o "%0.f" -t "$avgUploadBW10s" "bits")
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#echo "The average Download in BITS in the last 10 seconds is $avgDownloadBW10sInBits"
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#echo "The average Upload in BITS in the last 10 seconds is $avgUploadBW10sInBits"
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# if the average ping is higher than the maximum allowed ping, decrease bandwidth
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if [ 1 -eq "$(echo "${avgping} > ${pingMax}" | bc)" ]
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then
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echo "ping is too high ${avgping}"
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decreaseDownloadBandwidth
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decreaseUploadBandwidth
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fi
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# if the average ping is below optimal, increase bandwidth
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if [ 1 -eq "$(echo "${avgping} < ${pingOpt}" | bc)" ]
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then
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echo "ping is optimal ${avgping}"
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increaseDownloadBandwidth
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increaseUploadBandwidth
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fi
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echo "Sleeping for a minute"
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sleep 5
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done
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