Parses SS output for BBR flow live, and outputs in CSV format. Adjust the sleep interval if you want. Use as: `./live-ss-parse.sh 10.0.0.1 5201 | tee outfile.csv` where the argument is the peer IP address and port of the flow you are interested in.

ss-parse.sh

#!/bin/bash

dst=$1
dstport=$2

while [ 1 ]; do
  ts=$(date +%s.%N)
  line=$(ss -eipn dst "$dst:$dstport" | grep "bbr")
	rto=$(echo $line | grep -oP '\brto:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | tr -d ' ')
	rttvals=$(echo $line | grep -oP '\brtt:.*?(\s|$)' |  awk -F '[:/]' '{print $2","$3}' | tr -d ' ')
	mss=$(echo $line | grep -oP '\bmss:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | tr -d ' ')
	pmtu=$(echo $line | grep -oP '\bpmtu:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | tr -d ' ')
	rcvmss=$(echo $line | grep -oP '\brcvmss:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | tr -d ' ')
	advmss=$(echo $line | grep -oP '\badvmss:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | tr -d ' ')
	cwnd=$(echo $line | grep -oP '\bcwnd:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | tr -d ' ')
	bytes_acked=$(echo $line | grep -oP '\bbytes_acked:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | tr -d ' ')
	segs_out=$(echo $line | grep -oP '\bsegs_out:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | tr -d ' ')
	segs_in=$(echo $line | grep -oP '\bsegs_in:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | tr -d ' ')
	data_segs_out=$(echo $line | grep -oP '\bdata_segs_out:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | tr -d ' ')
	send=$(echo $line | grep -oP "(?<=send )[^ ]+" )
	lastrcv=$(echo $line | grep -oP '\blastrcv:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | tr -d ' ')
	pacing_rate=$(echo $line | grep -oP "(?<=pacing_rate )[^ ]+" )
	delivery_rate=$(echo $line | grep -oP "(?<=delivery_rate )[^ ]+" )
	busy=$(echo $line | grep -oP '\bbusy:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | awk -F '[ms]' '{print $1}' | tr -d ' ')
	rwnd_limited=$(echo $line | grep -oP '\brwnd_limited:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | awk -F '[ms]' '{print $1}' | tr -d ' ')
	unacked=$(echo $line | grep -oP '\bunacked:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | tr -d ' ')
	retrans_total=$(echo $line | grep -oP '\bretrans:.*?(\s|$)' |  awk -F '[:/]' '{print $3}' | tr -d ' ')
	lost=$(echo $line | grep -oP '\blost:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | tr -d ' ')
	sacked=$(echo $line | grep -oP '\bsacked:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | tr -d ' ')
	reordering=$(echo $line | grep -oP '\breordering:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | tr -d ' ')
	rcv_space=$(echo $line | grep -oP '\brcv_space:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | tr -d ' ')
	rcv_ssthresh=$(echo $line | grep -oP '\brcv_ssthresh:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | tr -d ' ')
	notsent=$(echo $line | grep -oP '\bnotsent:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | tr -d ' ')
	minrtt=$(echo $line | grep -oP '\bminrtt:.*?(\s|$)' |  awk -F '[:,]' '{print $2}' | tr -d ' ')

	bbrvals=$(echo $line | grep -oP '\bbbr:.*?(\s|$)' |  awk -F '[:,]' '{print $3","$5","$7","$9}' | tr -d ")" | tr -d ' ')
	output="$ts,$rto,$rttvals,$mss,$pmtu,$rcvmss,$advmss,$cwnd,$bytes_acked,$segs_out,$segs_in,$data_segs_out,$send,$lastrcv,$pacing_rate,$delivery_rate,$busy,$rwnd_limited,$unacked,$retrans_total,$lost,$sacked,$reordering,$rcv_space,$rcv_ssthresh,$notsent,$minrtt,$bbrvals"
	echo $output
	sleep 0.05
  test $? -gt 128 && break; 
    
done