#!/bin/sh
PATH=/usr/local/dagsnaps/bin:$PATH

if [ -z $1 ]
then
	echo "Error: Enter a DAG trace file (.d3h)"
	exit 1
fi

if [ ! -f $1 ]
then
	echo "Error: File $1 doesn't exist!"
	exit 1
fi

if [ -z $2 ]
then
	echo "Error: you need to enter a receive host"
	exit 1
fi

if [ -z $3 ]
then
	echo "Error: you must enter a packet size to grep for!"
	exit 1
fi

if [ -z $4 ]
then
	echo "Num of hops not entered, defaults to 1"
fi

# Note that dagbpf is supported by the DAG 3.2E card ONLY, where as
# dagconvert is supported by the DAG 3.5E card ONLY.

# dagbpf -e < $1 | tcpdump -tt udp -r - | egrep "udp $2" > $1.sent.tcpdump
# dagbpf -e < $1 | tcpdump -tt icmp -r - > $1.receive.tcpdump

dagconvert -T erf:pcap -c 32 -i $1 | tcpdump -tt udp and host $2 -r - | egrep "udp $3" > $1.sent.tcpdump
dagconvert -T erf:pcap -c 32 -i $1 | tcpdump -tt icmp -r - > $1.receive.tcpdump
tcpdump2dt-rtt -t $1.receive.tcpdump $1.sent.tcpdump $1.dt $4