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#!/bin/sh
PIDFILE=/tmp/tcpdump.pid
TESTCASE=$1
if [ "z$TTCN3_PCAP_PATH" = "z" ]; then
TTCN3_PCAP_PATH=/tmp
fi
# Wait for up to 2 seconds if we keep receiving traffinc from tcpdump,
# otherwise we might lose last packets from test.
i=0
prev_count=-1
count=$(stat --format="%s" "$TTCN3_PCAP_PATH/$TESTCASE.pcap")
while [ $count -gt $prev_count ] && [ $i -lt 2 ]
do
echo "Waiting for tcpdump to finish... $i (prev_count=$prev_count, count=$count)"
sleep 1
prev_count=$count
count=$(stat --format="%s" "$TTCN3_PCAP_PATH/$TESTCASE.pcap")
i=$((i+1))
done
if [ -e $PIDFILE ]; then
# NOTE: This requires you to be root or something like
# "laforge ALL=NOPASSWD: /usr/sbin/tcpdump, /bin/kill" in your sudoers file
if [ "$(id -u)" = "0" ]; then
kill "$(cat "$PIDFILE")"
else
sudo kill "$(cat "$PIDFILE")"
fi
rm $PIDFILE
fi
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