ttcn3
/
osmo-ttcn3-hacks
mirror of https://gerrit.osmocom.org/osmo-ttcn3-hacks
10
0
Fork 1
Code Issues Releases Wiki Activity

Create dummy gsmtap sink with netcat 

otherwise ICMP messages appear in pcap files and some messages are lost
since they seem to be dropped by the kernel.

Change-Id: Id69d98db63f8260067ad6bc1525fb05c936912f2
This commit is contained in:
Pau Espin 2019-10-02 13:00:51 +02:00 committed by pespin
parent 02f77d8807
commit ad931f236b
2 changed files with 39 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
ttcn3-tcpdump-start.sh
View File

@ -1,10 +1,22 @@
#!/bin/sh #!/bin/sh
PIDFILE=/tmp/dumper.pid PIDFILE_PCAP=/tmp/pcap.pid
TCPDUMP=/usr/sbin/tcpdump TCPDUMP=/usr/sbin/tcpdump
DUMPCAP=/usr/bin/dumpcap DUMPCAP=/usr/bin/dumpcap
PIDFILE_NETCAT=/tmp/netcat.pid
NETCAT=/bin/nc
GSMTAP_PORT=4729
TESTCASE=$1 TESTCASE=$1
kill_rm_pidfile() {
if [ -e $1 ]; then
kill "$(cat "$1")"
rm $1
fi
}
echo "------ $TESTCASE ------" echo "------ $TESTCASE ------"
date date
@ -12,10 +24,8 @@ if [ "z$TTCN3_PCAP_PATH" = "z" ]; then
TTCN3_PCAP_PATH=/tmp TTCN3_PCAP_PATH=/tmp
fi fi
if [ -e $PIDFILE ]; then kill_rm_pidfile $PIDFILE_NETCAT
kill "$(cat "$PIDFILE")" kill_rm_pidfile $PIDFILE_PCAP
rm $PIDFILE
fi
if [ "$(id -u)" = "0" ]; then if [ "$(id -u)" = "0" ]; then
CMD="$TCPDUMP -U" CMD="$TCPDUMP -U"
@ -39,9 +49,14 @@ if [ -x $DUMPCAP ]; then
fi fi
fi fi
# Create a dummy sink for GSMTAP packets
$NETCAT -l -u -k -p $GSMTAP_PORT >/dev/null 2>$TESTCASE.netcat.stderr &
PID=$!
echo $PID > $PIDFILE_NETCAT
$CMD -s 1500 -n -i any -w "$TTCN3_PCAP_PATH/$TESTCASE.pcap" >$TTCN3_PCAP_PATH/$TESTCASE.pcap.stdout 2>&1 & $CMD -s 1500 -n -i any -w "$TTCN3_PCAP_PATH/$TESTCASE.pcap" >$TTCN3_PCAP_PATH/$TESTCASE.pcap.stdout 2>&1 &
PID=$! PID=$!
echo $PID > $PIDFILE echo $PID > $PIDFILE_PCAP
# Wait until packet dumper creates the pcap file and starts recording. # Wait until packet dumper creates the pcap file and starts recording.
# We generate some traffic until we see packet dumper catches it. # We generate some traffic until we see packet dumper catches it.

30
ttcn3-tcpdump-stop.sh
View File

@ -1,9 +1,24 @@
#!/bin/sh #!/bin/sh
PIDFILE=/tmp/dumper.pid PIDFILE_PCAP=/tmp/pcap.pid
PIDFILE_NETCAT=/tmp/netcat.pid
TESTCASE=$1 TESTCASE=$1
VERDICT="$2" VERDICT="$2"
kill_rm_pidfile() {
if [ -e $1 ]; then
PSNAME="$(ps -q "$(cat "$1")" -o comm=)"
if [ "$PSNAME" != "sudo" ]; then
kill "$(cat "$1")"
else
# NOTE: This requires you to be root or something like
# "laforge ALL=NOPASSWD: /usr/sbin/tcpdump, /bin/kill" in your sudoers file
sudo kill "$(cat "$1")"
fi
rm $1
fi
}
date date
if [ x"$VERDICT" = x"pass" ]; then if [ x"$VERDICT" = x"pass" ]; then
@ -31,14 +46,5 @@ do
i=$((i+1)) i=$((i+1))
done done
if [ -e $PIDFILE ]; then kill_rm_pidfile "$PIDFILE_PCAP"
DUMPER="$(ps -q "$(cat "$PIDFILE")" -o comm=)" kill_rm_pidfile "$PIDFILE_NETCAT"
if [ "$DUMPER" != "sudo" ]; then
kill "$(cat "$PIDFILE")"
else
# NOTE: This requires you to be root or something like
# "laforge ALL=NOPASSWD: /usr/sbin/tcpdump, /bin/kill" in your sudoers file
sudo kill "$(cat "$PIDFILE")"
fi
rm $PIDFILE
fi