aping

#!/usr/bin/env bash

# Monitors output of ping and writes a log to /tmp

if [ "${#}" != 1 ]; then
	echo "Usage: ${0} [target]" > /dev/stderr
	exit 1
fi
echo "[$(date)] Starting aping" | tee /tmp/aping.${1}.log

n=1

while IFS='' read -r line; do
	[[ "${line}" =~ ^PING ]] && continue
	if ! [[ "${line}" =~ 64\ bytes\ from ]]; then
		echo "[$(date)] Error: ${line}" | tee -a /tmp/aping.log
		continue
	fi

	seq_col="$(echo "${line}" | cut -d' ' -f5 | cut -d'=' -f2)"
	tim_col="$(echo "${line}" | cut -d' ' -f7 | cut -d'=' -f2)"
	uni_col="$(echo "${line}" | cut -d' ' -f8)"
	if [ "${seq_col}" != "${n}" ]; then
		echo "[$(date)] Sequence check failed. Expected ${n}, got ${seq_col}" | tee -a /tmp/aping.${1}.log
	fi
	if [ "${uni_col}" != ms ]; then
		echo "[$(date)] Wrong unit for time at ${seq_col}. Got ${tim_col} ${uni_col}" | tee -a /tmp/aping.${1}.log
	fi
	echo $line

	n=$((${seq_col}+1))
done < <(ping -i 0.2 "${1}")