#!/bin/bash

get_speeds() {
    # returns ping= download= upload=
    librespeed-cli --server 43 --simple 2>&1 | perl -pe 's/(\w+)(?: \w+)?:\s+([0-9]+\.[0-9]+).*/\L\1=\2/p'
}

get_xx_bytes() {
    local xx_bytes=( $(ssh -q root@192.168.1.1 -p2222 cat /sys/class/net/$intf/statistics/{r,t}x_bytes) )
    echo rx_bytes=${xx_bytes[0]}
    echo tx_bytes=${xx_bytes[1]}
}

while [[ $# > 1 ]]; do
    case "$1" in
        -o|--output)    out="$2";    shift 2;;
        -s|--server)    server="$2"; shift 2;;
        -i|--interface) intf="$2";   shift 2;;
    esac
done

out=${out:-speedtest.log}
intf=${intf:-vlan1}

if [[ ! -e "$out" ]]; then
    echo "date,ping,download,upload" > "$out"
fi

date=$(date --rfc-3339=seconds -u)
source <(get_speeds)
printf "%s,%.3f,%.3f,%.3f\n" "$date" "$ping" "$download" "$upload" >> "$out"