diff options
Diffstat (limited to 'ttcn3-tcpdump-start.sh')
| -rwxr-xr-x | ttcn3-tcpdump-start.sh | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/ttcn3-tcpdump-start.sh b/ttcn3-tcpdump-start.sh index 10e8ab48..0ce88e96 100755 --- a/ttcn3-tcpdump-start.sh +++ b/ttcn3-tcpdump-start.sh @@ -1,6 +1,7 @@ #!/bin/sh PIDFILE=/tmp/tcpdump.pid +TCPDUMP=/usr/sbin/tcpdump TESTCASE=$1 if [ "z$TTCN3_PCAP_PATH" = "z" ]; then @@ -15,20 +16,28 @@ fi # NOTE: This requires you to be root or something like # "laforge ALL=NOPASSWD: /usr/sbin/tcpdump, /bin/kill" in your sudoers file if [ "$(id -u)" = "0" ]; then - CMD=/usr/sbin/tcpdump + CMD=$TCPDUMP else - CMD="sudo /usr/sbin/tcpdump" + CMD="sudo $TCPDUMP" fi -$CMD -s 0 -n -i any -w "$TTCN3_PCAP_PATH/$TESTCASE.pcap" >$TTCN3_PCAP_PATH/$TESTCASE.pcap.log 2>&1 & +$CMD -U -s 0 -n -i any -w "$TTCN3_PCAP_PATH/$TESTCASE.pcap" >$TTCN3_PCAP_PATH/$TESTCASE.pcap.log 2>&1 & PID=$! echo $PID > $PIDFILE -# Wait until tcpdump creates the pcap file to give it some time to start listenting. +# Wait until tcpdump creates the pcap file and starts recording. +# We generate some traffic until we see tcpdump catches it. # Timeout is 10 seconds. +ping 127.0.0.1 >/dev/null 2>&1 & +PID=$! i=0 -while [ ! -f "$TTCN3_PCAP_PATH/$TESTCASE.pcap" ] && [ $i -lt 10 ] +while [ ! -f "$TTCN3_PCAP_PATH/$TESTCASE.pcap" ] || + [ "$($TCPDUMP -r "$TTCN3_PCAP_PATH/$TESTCASE.pcap" 2>/dev/null | wc -l)" -eq 0 ] do echo "Waiting for tcpdump to start... $i" sleep 1 i=$((i+1)) + if [ $i -eq 10 ]; then + break + fi done +kill $PID |