Internet Speedtest

Shell script /usr/bin/fwspeedtest

#!/bin/bash
#
# Author:  Frank Wulf
# Version: 1.2 (2020-04-24)
#

runs=2
tarif="Freenet FUNK"
exclude=0
comment=""
out=/tmp/fwspeedtest.out

if [ -f "$out" ]; then
  rm $out 1>/dev/null 2>&1
fi

# Run the speedtest <runs> times without VPN connection
for i in `eval echo {1..$runs}`
do
  # Check if VPN connection is active
  systemctl status openvpn 1>/dev/null 2>&1
  if [ $? -eq 0 ]; then
    vpn_active=1
    # Stop VPN connection
    systemctl stop openvpn
    sleep 5
  else
    vpn_active=0
  fi

  # Fill timestamp field
  timestamp[$i]=`date +'%Y-%m-%d %H:%M:%S'`

  # Run speedtest
  /usr/bin/speedtest --format=csv >>$out
  retcode=$?

  if [ $vpn_active -eq 1 ]; then
    # Start VPN connection
    systemctl start openvpn
  fi

  if [ "$retcode" -ne 0 ]; then
    exit 1
  fi

  if [ $i -lt $runs ]; then
    # Wait 15 seconds between two speedtests
    sleep 15
  fi
done

download_max=0
i=0

while read line; do
  i=$((i+1))
  download_new=`echo "$line"|awk -F '^ *"|" *, *"|" *$' '{ print $7 }'`
  if [ $download_new -gt $download_max ]; then
    # Download rate is faster than previous ones
    sw_max=1
  else
    sw_max=0
  fi

  if [ $sw_max -eq 1 ]; then
    download=$download_new
    server_id=`echo "$line"|awk -F '^ *"|" *, *"|" *$' '{ print $3 }'`
    server_name=`echo "$line"|awk -F '^ *"|" *, *"|" *$' '{ print $2 }'`
    latency=`echo "$line"|awk -F '^ *"|" *, *"|" *$' '{ print $4 }'`
    jitter=`echo "$line"|awk -F '^ *"|" *, *"|" *$' '{ print $5 }'`
    packet_loss=`echo "$line"|awk -F '^ *"|" *, *"|" *$' '{ print $6 }'`
    download=`echo "$line"|awk -F '^ *"|" *, *"|" *$' '{ print $7 }'`
    upload=`echo "$line"|awk -F '^ *"|" *, *"|" *$' '{ print $8 }'`
    download_used=`echo "$line"|awk -F '^ *"|" *, *"|" *$' '{ print $9 }'`
    upload_used=`echo "$line"|awk -F '^ *"|" *, *"|" *$' '{ print $10 }'`
    download_max=$download
    row=$i
  fi

  if [ $i -eq $runs ]; then
    # Round values for latency. jitter and packet_loss
    latency=`echo "scale=2; ($latency + 0.005) / 1" | bc`
    jitter=`echo "scale=2; ($jitter + 0.005) / 1" | bc`
    packet_loss=`echo "scale=1; ($packet_loss + 0.05) / 1" | bc`

    # Convert download/upload speed from bytes per second to Mbps and round values
    download=`echo "scale=8; $download * 8 / 1024 / 1024" | bc`
    download=`echo "scale=2; ($download + 0.005) / 1" | bc`
    upload=`echo "scale=8; $upload * 8 / 1024 / 1024" | bc`
    upload=`echo "scale=2; ($upload + 0.005) / 1" | bc`

    # Convert used bytes to MBytes and round values
    download_used=`echo "scale=8; $download_used / 1024 / 1024" | bc`
    download_used=`echo "scale=1; ($download_used + 0.05) / 1" | bc`
    upload_used=`echo "scale=8; $upload_used / 1024 / 1024" | bc`
    upload_used=`echo "scale=1; ($upload_used + 0.05) / 1" | bc`

    vpn_active=0

    # Fill timestamp field
    timestamp=${timestamp[$row]}

    # Insert data into database
    sql="INSERT INTO fw_speedtest (timestamp,server_id,server_name,latency,"
    sql+="jitter,packet_loss,download,upload,download_used,upload_used,"
    sql+="vpn_active,tarif,exclude,comment) VALUES ("
    sql+="\"$timestamp\", \"$server_id\", \"$server_name\", \"$latency\", "
    sql+="\"$jitter\", \"$packet_loss\", \"$download\", \"$upload\", "
    sql+="\"$download_used\", \"$upload_used\", \"$vpn_active\", "
    sql+="\"$tarif\", \"$exclude\", \"$comment\")"

    mysql --login-path=fwsysmon -D fwsysmon -e "$sql"

  fi

done <<<`cat $out`

exit 0

Scheduling Speedtest with systemd

• Service Unit file /lib/systemd/system/fwspeedtest.service

[Unit]
Description=LTE speedtest

[Service]
Type=oneshot
ExecStart=/usr/bin/fwspeedtest
User=root
Group=root

• Timer Unit file /lib/systemd/system/fwspeedtest.timer

[Unit]
Description=Run LTE speedtest four times a day

[Timer]
OnCalendar=*-*-* 0,6,12,18:00
RandomizedDelaySec=6h
Persistent=true

[Install]
WantedBy=timers.target