Harald Welte | e057146 | 2018-02-14 15:42:14 +0100 | [diff] [blame] | 1 | #!/bin/sh |
| 2 | |
Pau Espin Pedrol | ad931f2 | 2019-10-02 13:00:51 +0200 | [diff] [blame] | 3 | PIDFILE_PCAP=/tmp/pcap.pid |
Oliver Smith | fbf3345 | 2021-12-16 12:44:42 +0100 | [diff] [blame] | 4 | TCPDUMP=$(command -v tcpdump) |
| 5 | DUMPCAP=$(command -v dumpcap) |
Pau Espin Pedrol | ad931f2 | 2019-10-02 13:00:51 +0200 | [diff] [blame] | 6 | |
| 7 | PIDFILE_NETCAT=/tmp/netcat.pid |
Oliver Smith | fbf3345 | 2021-12-16 12:44:42 +0100 | [diff] [blame] | 8 | NETCAT=$(command -v nc) |
Pau Espin Pedrol | ad931f2 | 2019-10-02 13:00:51 +0200 | [diff] [blame] | 9 | GSMTAP_PORT=4729 |
| 10 | |
Harald Welte | e057146 | 2018-02-14 15:42:14 +0100 | [diff] [blame] | 11 | TESTCASE=$1 |
| 12 | |
Pau Espin Pedrol | ad931f2 | 2019-10-02 13:00:51 +0200 | [diff] [blame] | 13 | kill_rm_pidfile() { |
| 14 | if [ -e $1 ]; then |
| 15 | kill "$(cat "$1")" |
| 16 | rm $1 |
| 17 | fi |
| 18 | } |
| 19 | |
Neels Hofmeyr | ced8acf | 2019-02-26 05:03:22 +0100 | [diff] [blame] | 20 | echo "------ $TESTCASE ------" |
| 21 | date |
| 22 | |
Harald Welte | e057146 | 2018-02-14 15:42:14 +0100 | [diff] [blame] | 23 | if [ "z$TTCN3_PCAP_PATH" = "z" ]; then |
| 24 | TTCN3_PCAP_PATH=/tmp |
| 25 | fi |
| 26 | |
Pau Espin Pedrol | ad931f2 | 2019-10-02 13:00:51 +0200 | [diff] [blame] | 27 | kill_rm_pidfile $PIDFILE_NETCAT |
| 28 | kill_rm_pidfile $PIDFILE_PCAP |
Harald Welte | e057146 | 2018-02-14 15:42:14 +0100 | [diff] [blame] | 29 | |
Max | e521445 | 2019-03-14 18:15:27 +0100 | [diff] [blame] | 30 | if [ "$(id -u)" = "0" ]; then |
| 31 | CMD="$TCPDUMP -U" |
| 32 | else |
Harald Welte | e057146 | 2018-02-14 15:42:14 +0100 | [diff] [blame] | 33 | # NOTE: This requires you to be root or something like |
| 34 | # "laforge ALL=NOPASSWD: /usr/sbin/tcpdump, /bin/kill" in your sudoers file |
Max | e521445 | 2019-03-14 18:15:27 +0100 | [diff] [blame] | 35 | CMD="sudo $TCPDUMP -U" |
Harald Welte | e057146 | 2018-02-14 15:42:14 +0100 | [diff] [blame] | 36 | fi |
Max | 81487c8 | 2019-03-18 14:18:31 +0100 | [diff] [blame] | 37 | |
| 38 | if [ -x $DUMPCAP ]; then |
| 39 | CAP_ERR="1" |
| 40 | if [ -x /sbin/setcap ]; then |
| 41 | # N. B: this check requires libcap2-bin package |
Harald Welte | 5b11d91 | 2020-12-11 15:33:48 +0100 | [diff] [blame] | 42 | /sbin/setcap -q -v 'cap_net_admin,cap_net_raw=pie' $DUMPCAP |
Max | 81487c8 | 2019-03-18 14:18:31 +0100 | [diff] [blame] | 43 | CAP_ERR="$?" |
| 44 | fi |
Eric Wild | c01eada | 2022-03-30 01:43:26 +0200 | [diff] [blame] | 45 | |
| 46 | # did we implicitly inherit all those caps because we're root in a netns? |
| 47 | if [ -u $DUMPCAP -o "$CAP_ERR" = "1" ]; then |
| 48 | getpcaps 0 2>&1 | grep -e cap_net_admin | grep -q -e cap_net_raw |
| 49 | CAP_ERR="$?" |
| 50 | fi |
| 51 | |
| 52 | # did we implicitly inherit all those caps because we're root in a netns? |
| 53 | if [ -u $DUMPCAP -o "$CAP_ERR" = "1" ]; then |
| 54 | getpcaps 0 2>&1 | grep -q -e " =ep" # all perms |
| 55 | CAP_ERR="$?" |
| 56 | fi |
| 57 | |
Max | 81487c8 | 2019-03-18 14:18:31 +0100 | [diff] [blame] | 58 | if [ -u $DUMPCAP -o "$CAP_ERR" = "0" ]; then |
| 59 | CMD="$DUMPCAP -q" |
| 60 | else |
| 61 | echo "NOTE: unable to use dumpcap due to missing capabilities or suid bit" |
| 62 | fi |
| 63 | fi |
| 64 | |
Pau Espin Pedrol | ad931f2 | 2019-10-02 13:00:51 +0200 | [diff] [blame] | 65 | # Create a dummy sink for GSMTAP packets |
| 66 | $NETCAT -l -u -k -p $GSMTAP_PORT >/dev/null 2>$TESTCASE.netcat.stderr & |
| 67 | PID=$! |
| 68 | echo $PID > $PIDFILE_NETCAT |
| 69 | |
Max | e521445 | 2019-03-14 18:15:27 +0100 | [diff] [blame] | 70 | $CMD -s 1500 -n -i any -w "$TTCN3_PCAP_PATH/$TESTCASE.pcap" >$TTCN3_PCAP_PATH/$TESTCASE.pcap.stdout 2>&1 & |
Harald Welte | e057146 | 2018-02-14 15:42:14 +0100 | [diff] [blame] | 71 | PID=$! |
Pau Espin Pedrol | ad931f2 | 2019-10-02 13:00:51 +0200 | [diff] [blame] | 72 | echo $PID > $PIDFILE_PCAP |
Pau Espin Pedrol | b01d313 | 2018-02-15 14:43:58 +0100 | [diff] [blame] | 73 | |
Max | e521445 | 2019-03-14 18:15:27 +0100 | [diff] [blame] | 74 | # Wait until packet dumper creates the pcap file and starts recording. |
| 75 | # We generate some traffic until we see packet dumper catches it. |
Pau Espin Pedrol | b01d313 | 2018-02-15 14:43:58 +0100 | [diff] [blame] | 76 | # Timeout is 10 seconds. |
Pau Espin Pedrol | 8fdd313 | 2018-02-15 16:01:50 +0100 | [diff] [blame] | 77 | ping 127.0.0.1 >/dev/null 2>&1 & |
| 78 | PID=$! |
Pau Espin Pedrol | b01d313 | 2018-02-15 14:43:58 +0100 | [diff] [blame] | 79 | i=0 |
Pau Espin Pedrol | 8fdd313 | 2018-02-15 16:01:50 +0100 | [diff] [blame] | 80 | while [ ! -f "$TTCN3_PCAP_PATH/$TESTCASE.pcap" ] || |
Alexander Couzens | d1f4095 | 2018-05-12 16:52:59 +0200 | [diff] [blame] | 81 | [ "$(stat -c '%s' "$TTCN3_PCAP_PATH/$TESTCASE.pcap")" -eq 32 ] |
Pau Espin Pedrol | b01d313 | 2018-02-15 14:43:58 +0100 | [diff] [blame] | 82 | do |
Max | e521445 | 2019-03-14 18:15:27 +0100 | [diff] [blame] | 83 | echo "Waiting for packet dumper to start... $i" |
Pau Espin Pedrol | b01d313 | 2018-02-15 14:43:58 +0100 | [diff] [blame] | 84 | sleep 1 |
| 85 | i=$((i+1)) |
Pau Espin Pedrol | 8fdd313 | 2018-02-15 16:01:50 +0100 | [diff] [blame] | 86 | if [ $i -eq 10 ]; then |
| 87 | break |
| 88 | fi |
Pau Espin Pedrol | b01d313 | 2018-02-15 14:43:58 +0100 | [diff] [blame] | 89 | done |
Pau Espin Pedrol | 8fdd313 | 2018-02-15 16:01:50 +0100 | [diff] [blame] | 90 | kill $PID |