#!/bin/bash
usage() {
	version
	echo ""
	echo "Usage: dumbdecode [-h] [-v]"
	echo "       dumbdecode [-w 16] PCAP [PCAP ...]"
	echo ""
	echo "	-w	data width of the packet hex dump (default: 16)"
	echo "	PCAP	one to many packet capture files (libpcap 2.4)"
	echo ""
}
version() {
	echo "dumbdecode v.1.1337 - The Dumb Decoder"
}

width=16

while getopts ":hvw:" opt; do
	case $opt in
		h) usage; exit 0;;
		v) version; exit 0;;
		w)
			if [[ ${OPTARG} -gt 0 && ${OPTARG} -le 64 ]]; then
				width=${OPTARG}
			else
				echo "Invalid width ${OPTARG}"; usage; exit 1
			fi;;
		?) echo "Invalid option -${OPTARG}"; usage; exit 1;;
	esac
done
shift $((OPTIND-1))

if [[ $# == 0 ]]; then usage; fi

pmerge "$@" | puniq - | pcat | while read ts proto src dst payload; do
	: when=$(date --utc --rfc-3339=ns -d "@$ts") src=${src%,*} dst=${dst%,*}
	printf "Packet %s None: None\n" $proto
	printf "    %s -> %s (%s)\n" ${src/,/:} ${dst/,/:} "${when/\+00:00/Z}"
	echo $payload | unhex | hdng -w ${width}
	echo
done