44 lines
984 B
Bash
Executable File
44 lines
984 B
Bash
Executable File
#!/bin/sh
|
|
|
|
PIDFILE=/tmp/tcpdump.pid
|
|
TCPDUMP=/usr/sbin/tcpdump
|
|
TESTCASE=$1
|
|
|
|
if [ "z$TTCN3_PCAP_PATH" = "z" ]; then
|
|
TTCN3_PCAP_PATH=/tmp
|
|
fi
|
|
|
|
if [ -e $PIDFILE ]; then
|
|
kill "$(cat "$PIDFILE")"
|
|
rm $PIDFILE
|
|
fi
|
|
|
|
# NOTE: This requires you to be root or something like
|
|
# "laforge ALL=NOPASSWD: /usr/sbin/tcpdump, /bin/kill" in your sudoers file
|
|
if [ "$(id -u)" = "0" ]; then
|
|
CMD=$TCPDUMP
|
|
else
|
|
CMD="sudo $TCPDUMP"
|
|
fi
|
|
$CMD -U -s 1500 -n -i any -w "$TTCN3_PCAP_PATH/$TESTCASE.pcap" >$TTCN3_PCAP_PATH/$TESTCASE.pcap.stdout 2>&1 &
|
|
PID=$!
|
|
echo $PID > $PIDFILE
|
|
|
|
# Wait until tcpdump creates the pcap file and starts recording.
|
|
# We generate some traffic until we see tcpdump catches it.
|
|
# Timeout is 10 seconds.
|
|
ping 127.0.0.1 >/dev/null 2>&1 &
|
|
PID=$!
|
|
i=0
|
|
while [ ! -f "$TTCN3_PCAP_PATH/$TESTCASE.pcap" ] ||
|
|
[ "$(stat -c '%s' "$TTCN3_PCAP_PATH/$TESTCASE.pcap")" -eq 32 ]
|
|
do
|
|
echo "Waiting for tcpdump to start... $i"
|
|
sleep 1
|
|
i=$((i+1))
|
|
if [ $i -eq 10 ]; then
|
|
break
|
|
fi
|
|
done
|
|
kill $PID
|