78 lines
1.7 KiB
Bash
Executable File
78 lines
1.7 KiB
Bash
Executable File
#!/bin/sh
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PIDFILE_PCAP=/tmp/pcap.pid
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TCPDUMP=/usr/sbin/tcpdump
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DUMPCAP=/usr/bin/dumpcap
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PIDFILE_NETCAT=/tmp/netcat.pid
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NETCAT=/bin/nc
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GSMTAP_PORT=4729
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TESTCASE=$1
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kill_rm_pidfile() {
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if [ -e $1 ]; then
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kill "$(cat "$1")"
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rm $1
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fi
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}
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echo "------ $TESTCASE ------"
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date
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if [ "z$TTCN3_PCAP_PATH" = "z" ]; then
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TTCN3_PCAP_PATH=/tmp
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fi
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kill_rm_pidfile $PIDFILE_NETCAT
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kill_rm_pidfile $PIDFILE_PCAP
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if [ "$(id -u)" = "0" ]; then
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CMD="$TCPDUMP -U"
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else
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# NOTE: This requires you to be root or something like
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# "laforge ALL=NOPASSWD: /usr/sbin/tcpdump, /bin/kill" in your sudoers file
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CMD="sudo $TCPDUMP -U"
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fi
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if [ -x $DUMPCAP ]; then
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CAP_ERR="1"
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if [ -x /sbin/setcap ]; then
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# N. B: this check requires libcap2-bin package
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setcap -q -v 'cap_net_admin,cap_net_raw=pie' $DUMPCAP
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CAP_ERR="$?"
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fi
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if [ -u $DUMPCAP -o "$CAP_ERR" = "0" ]; then
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CMD="$DUMPCAP -q"
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else
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echo "NOTE: unable to use dumpcap due to missing capabilities or suid bit"
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fi
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fi
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# Create a dummy sink for GSMTAP packets
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$NETCAT -l -u -k -p $GSMTAP_PORT >/dev/null 2>$TESTCASE.netcat.stderr &
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PID=$!
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echo $PID > $PIDFILE_NETCAT
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$CMD -s 1500 -n -i any -w "$TTCN3_PCAP_PATH/$TESTCASE.pcap" >$TTCN3_PCAP_PATH/$TESTCASE.pcap.stdout 2>&1 &
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PID=$!
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echo $PID > $PIDFILE_PCAP
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# Wait until packet dumper creates the pcap file and starts recording.
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# We generate some traffic until we see packet dumper catches it.
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# Timeout is 10 seconds.
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ping 127.0.0.1 >/dev/null 2>&1 &
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PID=$!
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i=0
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while [ ! -f "$TTCN3_PCAP_PATH/$TESTCASE.pcap" ] ||
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[ "$(stat -c '%s' "$TTCN3_PCAP_PATH/$TESTCASE.pcap")" -eq 32 ]
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do
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echo "Waiting for packet dumper to start... $i"
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sleep 1
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i=$((i+1))
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if [ $i -eq 10 ]; then
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break
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fi
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done
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kill $PID
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