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#!/bin/bash
#
# Test the capture engine of the Ethereal tools
#
# $Id$
#
# Wireshark - Network traffic analyzer
# By Gerald Combs <gerald@wireshark.org>
# Copyright 2005 Ulf Lamping
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# common exit status values
EXIT_OK=0
EXIT_COMMAND_LINE=1
EXIT_ERROR=2
# capture exactly 10 packets
capture_step_10packets() {
$DUT -i $TRAFFIC_CAPTURE_IFACE -w ./testout.pcap -c 10 -a duration:$TRAFFIC_CAPTURE_DURATION > ./testout.txt 2>&1
RETURNVALUE=$?
if [ ! $RETURNVALUE -eq $EXIT_OK ]; then
test_step_failed "exit status of $DUT: $RETURNVALUE"
# part of the Prerequisite checks
# probably wrong interface, output the possible interfaces
$TETHEREAL -D
return
fi
# we should have an output file now
if [ ! -f "./testout.pcap" ]; then
test_step_failed "No output file!"
return
fi
# ok, we got a capture file, does it contain exactly 10 packets?
$CAPINFOS ./testout.pcap > ./testout.txt
grep -i 'Number of packets: 10' ./testout.txt > /dev/null
if [ $? -eq 0 ]; then
test_step_ok
else
echo
cat ./testout.txt
# part of the Prerequisite checks
# probably wrong interface, output the possible interfaces
$TETHEREAL -D
test_step_failed "No or not enough traffic captured. Probably the wrong interface: $TRAFFIC_CAPTURE_IFACE!"
fi
}
# capture exactly 10 packets using "-w -" (piping to stdout)
capture_step_10packets_stdout() {
$DUT -i $TRAFFIC_CAPTURE_IFACE -c 10 -a duration:$TRAFFIC_CAPTURE_DURATION -w - > ./testout.pcap 2>./testout.txt
RETURNVALUE=$?
if [ ! $RETURNVALUE -eq $EXIT_OK ]; then
test_step_failed "exit status of $DUT: $RETURNVALUE"
$TETHEREAL -D
return
fi
# we should have an output file now
if [ ! -f "./testout.pcap" ]; then
test_step_failed "No output file!"
return
fi
# ok, we got a capture file, does it contain exactly 10 packets?
$CAPINFOS ./testout.pcap > ./testout2.txt 2>&1
grep -i 'Number of packets: 10' ./testout2.txt > /dev/null
if [ $? -eq 0 ]; then
test_step_ok
else
echo
cat ./testout.txt
cat ./testout2.txt
$TETHEREAL -D
test_step_failed "No or not enough traffic captured. Probably the wrong interface: $TRAFFIC_CAPTURE_IFACE!"
fi
}
# capture exactly 2 times 10 packets (multiple files)
capture_step_2multi_10packets() {
$DUT -i $TRAFFIC_CAPTURE_IFACE -w ./testout.pcap -c 10 -a duration:$TRAFFIC_CAPTURE_DURATION > ./testout.txt 2>&1
RETURNVALUE=$?
if [ ! $RETURNVALUE -eq $EXIT_OK ]; then
test_step_failed "exit status of $DUT: $RETURNVALUE"
# part of the Prerequisite checks
# probably wrong interface, output the possible interfaces
$TETHEREAL -D
return
fi
# we should have an output file now
if [ ! -f "./testout.pcap" ]; then
test_step_failed "No output file!"
return
fi
# ok, we got a capture file, does it contain exactly 10 packets?
$CAPINFOS ./testout.pcap > ./testout.txt
grep -i 'Number of packets: 10' ./testout.txt > /dev/null
if [ $? -eq 0 ]; then
test_step_ok
else
echo
cat ./testout.txt
test_step_failed "Probably the wrong interface (no traffic captured)!"
fi
}
# capture with a very unlikely read filter, packets must be zero afterwards
capture_step_read_filter() {
# valid, but very unlikely filter
$DUT -i $TRAFFIC_CAPTURE_IFACE -w ./testout.pcap -a duration:$TRAFFIC_CAPTURE_DURATION -R 'dcerpc.cn_call_id==123456' -c 10 > ./testout.txt 2>&1
RETURNVALUE=$?
if [ ! $RETURNVALUE -eq $EXIT_OK ]; then
test_step_failed "exit status: $RETURNVALUE"
return
fi
# we should have an output file now
if [ ! -f "./testout.pcap" ]; then
test_step_failed "No output file!"
return
fi
# ok, we got a capture file, does it contain exactly 0 packets?
$CAPINFOS ./testout.pcap > ./testout.txt
grep -i 'Number of packets: 0' ./testout.txt > /dev/null
if [ $? -eq 0 ]; then
test_step_ok
else
echo
cat ./testout.txt
test_step_failed "Capture file should contain zero packets!"
fi
}
# capture with a snapshot length
capture_step_snapshot() {
# capture with a snapshot length of 68 bytes for $TRAFFIC_CAPTURE_DURATION seconds
# this should result in no packets
$DUT -i $TRAFFIC_CAPTURE_IFACE -w ./testout.pcap -s 68 -a duration:$TRAFFIC_CAPTURE_DURATION > ./testout.txt 2>&1
RETURNVALUE=$?
if [ ! $RETURNVALUE -eq $EXIT_OK ]; then
test_step_failed "exit status: $RETURNVALUE"
return
fi
# we should have an output file now
if [ ! -f "./testout.pcap" ]; then
test_step_failed "No output file!"
return
fi
# use tethereal to filter out all packets, which are larger than 68 bytes
$TETHEREAL -r ./testout.pcap -w ./testout2.pcap -R 'frame.cap_len>68' > ./testout.txt 2>&1
# ok, we got a capture file, does it contain exactly 0 packets?
$CAPINFOS ./testout2.pcap > ./testout.txt
grep -i 'Number of packets: 0' ./testout.txt > /dev/null
if [ $? -eq 0 ]; then
test_step_ok
else
echo
cat ./testout.txt
test_step_failed "Capture file should contain zero packets!"
return
fi
}
ethereal_capture_suite() {
# Q: quit after cap, k: start capture immediately
DUT="$ETHEREAL -Q -k"
test_step_add "Capture 10 packets" capture_step_10packets
# piping to stdout doesn't work with Ethereal and capturing!
#test_step_add "Capture 10 packets using stdout: -w -" capture_step_10packets_stdout
# read filter doesn't work with Ethereal and capturing!
#test_step_add "Capture read filter (${TRAFFIC_CAPTURE_DURATION}s)" capture_step_read_filter
test_step_add "Capture snapshot length 68 bytes (${TRAFFIC_CAPTURE_DURATION}s)" capture_step_snapshot
}
tethereal_capture_suite() {
DUT=$TETHEREAL
test_step_add "Capture 10 packets" capture_step_10packets
test_step_add "Capture 10 packets using stdout: -w -" capture_step_10packets_stdout
test_step_add "Capture read filter (${TRAFFIC_CAPTURE_DURATION}s)" capture_step_read_filter
test_step_add "Capture snapshot length 68 bytes (${TRAFFIC_CAPTURE_DURATION}s)" capture_step_snapshot
}
dumpcap_capture_suite() {
#DUT="$DUMPCAP -Q"
DUT=$DUMPCAP
test_step_add "Capture 10 packets" capture_step_10packets
test_step_add "Capture 10 packets using stdout: -w -" capture_step_10packets_stdout
# read (display) filters intentionally doesn't work with dumpcap!
#test_step_add "Capture read filter (${TRAFFIC_CAPTURE_DURATION}s)" capture_step_read_filter
test_step_add "Capture snapshot length 68 bytes (${TRAFFIC_CAPTURE_DURATION}s)" capture_step_snapshot
}
capture_cleanup_step() {
rm -f ./testout.txt
rm -f ./testout2.txt
rm -f ./testout.pcap
rm -f ./testout2.pcap
}
capture_suite() {
test_step_set_pre capture_cleanup_step
test_step_set_post capture_cleanup_step
test_remark_add "Capture - need some traffic on interface: \"$TRAFFIC_CAPTURE_IFACE\""
test_suite_add "Tethereal capture" tethereal_capture_suite
test_suite_add "Ethereal capture" ethereal_capture_suite
test_suite_add "Dumpcap capture" dumpcap_capture_suite
}
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