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|
#!/bin/bash
#
# $Id$
# Randpkt testing script for TShark
#
# This script uses Randpkt to generate capture files with randomized
# content. It runs TShark on each generated file and checks for errors.
# The files are processed repeatedly until an error is found.
# Tweak the following to your liking.
TSHARK=./tshark
RANDPKT=./randpkt
# This needs to point to a 'date' that supports %s.
DATE=/bin/date
BASE_NAME=randpkt-`$DATE +%Y-%m-%d`-$$
# Temporary file directory and names.
# (had problems with this on cygwin, tried TMP_DIR=./ which worked)
TMP_DIR=/tmp
TMP_FILE=$BASE_NAME.pcap
ERR_FILE=$BASE_NAME.err
# Loop this many times (< 1 loops forever)
MAX_PASSES=0
# These may be set to your liking
# Stop the child process, if it's running longer than x seconds
MAX_CPU_TIME=900
# Stop the child process, if it's using more than y * 1024 bytes
MAX_VMEM=500000
# Trigger an abort if a dissector finds a bug.
# Uncomment to disable
WIRESHARK_ABORT_ON_DISSECTOR_BUG="True"
PKT_TYPES=`$RANDPKT -h | awk '/^\t/ {print $1}'`
# To do: add options for file names and limits
while getopts ":d:p:t:" OPTCHAR ; do
case $OPTCHAR in
d) TMP_DIR=$OPTARG ;;
p) MAX_PASSES=$OPTARG ;;
t) PKT_TYPES=$OPTARG ;;
esac
done
shift $(($OPTIND - 1))
# set some limits to the child processes, e.g. stop it if it's running longer then MAX_CPU_TIME seconds
# (ulimit is not supported well on cygwin and probably other platforms, e.g. cygwin shows some warnings)
ulimit -S -t $MAX_CPU_TIME -v $MAX_VMEM
ulimit -c unlimited
### usually you won't have to change anything below this line ###
# TShark arguments (you won't have to change these)
# n Disable network object name resolution
# V Print a view of the details of the packet rather than a one-line summary of the packet
# x Cause TShark to print a hex and ASCII dump of the packet data after printing the summary or details
# r Read packet data from the following infile
TSHARK_ARGS="-nVxr"
RANDPKT_ARGS="-b 2000 -c 5000"
NOTFOUND=0
for i in "$TSHARK" "$RANDPKT" "$DATE" "$TMP_DIR" ; do
if [ ! -x $i ]; then
echo "Couldn't find $i"
NOTFOUND=1
fi
done
if [ $NOTFOUND -eq 1 ]; then
exit 1
fi
HOWMANY="forever"
if [ $MAX_PASSES -gt 0 ]; then
HOWMANY="$MAX_PASSES passes"
fi
echo "Running $TSHARK with args: $TSHARK_ARGS ($HOWMANY)"
echo "Running $RANDPKT with args: $RANDPKT_ARGS"
echo ""
trap "MAX_PASSES=1; echo 'Caught signal'" HUP INT TERM
function exit_error() {
echo -e "\n ERROR"
echo -e "Processing failed. Capture info follows:\n"
echo " Input file: $CF"
if [ -d .svn ] ; then
echo -e "\nSubversion revision" >> $TMP_DIR/$ERR_FILE
svn log -l 1 >> $TMP_DIR/$ERR_FILE
elif [ -d .git ] ; then
echo -e "\nGit commit" >> $TMP_DIR/$ERR_FILE
svn log -l 1 >> $TMP_DIR/$ERR_FILE
fi
echo -e "stderr follows:\n"
cat $TMP_DIR/$ERR_FILE
exit 1
}
# Iterate over our capture files.
PASS=0
while [ $PASS -lt $MAX_PASSES -o $MAX_PASSES -lt 1 ] ; do
PASS=`expr $PASS + 1`
echo "Pass $PASS:"
for PKT_TYPE in $PKT_TYPES ; do
if [ $PASS -gt $MAX_PASSES ] ; then break ; fi # We caught a signal
echo -n " $PKT_TYPE: "
DISSECTOR_BUG=0
"$RANDPKT" $RANDPKT_ARGS -t $PKT_TYPE $TMP_DIR/$TMP_FILE \
> /dev/null 2>&1
"$TSHARK" $TSHARK_ARGS $TMP_DIR/$TMP_FILE \
> /dev/null 2> $TMP_DIR/$ERR_FILE
RETVAL=$?
grep -i "dissector bug" $TMP_DIR/$ERR_FILE \
> /dev/null 2>&1 && DISSECTOR_BUG=1
if [ $RETVAL -ne 0 -o $DISSECTOR_BUG -ne 0 ] ; then
RAND_FILE="randpkt-`$DATE +%Y-%m-%d`-$$.pcap"
mv $TMP_DIR/$TMP_FILE $TMP_DIR/$RAND_FILE
echo " Output file: $TMP_DIR/$RAND_FILE"
exit_error
fi
echo " OK"
rm -f $TMP_DIR/$TMP_FILE $TMP_DIR/$ERR_FILE
done
done
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