| #!/bin/sh |
| |
| PIDFILE_PCAP=/tmp/pcap.pid |
| TCPDUMP=/usr/sbin/tcpdump |
| DUMPCAP=/usr/bin/dumpcap |
| |
| PIDFILE_NETCAT=/tmp/netcat.pid |
| NETCAT=/bin/nc |
| GSMTAP_PORT=4729 |
| |
| TESTCASE=$1 |
| |
| kill_rm_pidfile() { |
| if [ -e $1 ]; then |
| kill "$(cat "$1")" |
| rm $1 |
| fi |
| } |
| |
| echo "------ $TESTCASE ------" |
| date |
| |
| if [ "z$TTCN3_PCAP_PATH" = "z" ]; then |
| TTCN3_PCAP_PATH=/tmp |
| fi |
| |
| kill_rm_pidfile $PIDFILE_NETCAT |
| kill_rm_pidfile $PIDFILE_PCAP |
| |
| if [ "$(id -u)" = "0" ]; then |
| CMD="$TCPDUMP -U" |
| else |
| # NOTE: This requires you to be root or something like |
| # "laforge ALL=NOPASSWD: /usr/sbin/tcpdump, /bin/kill" in your sudoers file |
| CMD="sudo $TCPDUMP -U" |
| fi |
| |
| if [ -x $DUMPCAP ]; then |
| CAP_ERR="1" |
| if [ -x /sbin/setcap ]; then |
| # N. B: this check requires libcap2-bin package |
| /sbin/setcap -q -v 'cap_net_admin,cap_net_raw=pie' $DUMPCAP |
| CAP_ERR="$?" |
| fi |
| if [ -u $DUMPCAP -o "$CAP_ERR" = "0" ]; then |
| CMD="$DUMPCAP -q" |
| else |
| echo "NOTE: unable to use dumpcap due to missing capabilities or suid bit" |
| 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/$TESTCASE.pcap.stdout 2>&1 & |
| PID=$! |
| echo $PID > $PIDFILE_PCAP |
| |
| # Wait until packet dumper creates the pcap file and starts recording. |
| # We generate some traffic until we see packet dumper catches it. |
| # Timeout is 10 seconds. |
| ping 127.0.0.1 >/dev/null 2>&1 & |
| PID=$! |
| i=0 |
| while [ ! -f "$TTCN3_PCAP_PATH/$TESTCASE.pcap" ] || |
| [ "$(stat -c '%s' "$TTCN3_PCAP_PATH/$TESTCASE.pcap")" -eq 32 ] |
| do |
| echo "Waiting for packet dumper to start... $i" |
| sleep 1 |
| i=$((i+1)) |
| if [ $i -eq 10 ]; then |
| break |
| fi |
| done |
| kill $PID |