forked from osmocom/wireshark
132 lines
3.5 KiB
Bash
Executable File
132 lines
3.5 KiB
Bash
Executable File
#!/bin/bash
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#
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# $Id$
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# Fuzz-testing script for Tethereal
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#
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# This script uses Editcap to add random errors ("fuzz") to a set of
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# capture files specified on the command line. It runs Tethereal on
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# each fuzzed file and checks for errors. The files are processed
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# repeatedly until an error is found.
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# Tweak the following to your liking. Editcap must support "-E".
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TETHEREAL=./tethereal
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EDITCAP=./editcap
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CAPINFOS=./capinfos
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# This needs to point to a 'date' that supports %s.
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DATE=/bin/date
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# Temporary file directory and names.
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# (had problems with this on cygwin, tried TMP_DIR=./ which worked)
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TMP_DIR=/tmp
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TMP_FILE=fuzz-test.pcap
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ERR_FILE=fuzz-err.txt
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# These may be set to your liking
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# Stop the child process, if it's running longer than x seconds
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MAX_CPU_TIME=900
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# Stop the child process, if it's using more than y * 1024 bytes
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MAX_VMEM=500000
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# Insert z times an error into the capture file (0.02 seems to be a good value to find errors)
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ERR_PROB=0.02
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# Trigger an abort if a dissector finds a bug.
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# Uncomment to disable
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ETHEREAL_ABORT_ON_DISSECTOR_BUG="True"
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# set some limits to the child processes, e.g. stop it if it's running longer then MAX_CPU_TIME seconds
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# (ulimit is not supported well on cygwin and probably other platforms, e.g. cygwin shows some warnings)
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ulimit -S -t $MAX_CPU_TIME -v $MAX_VMEM
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ulimit -c unlimited
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### usually you won't have to change anything below this line ###
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# Tethereal arguments (you won't have to change these)
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# n Disable network object name resolution
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# V Print a view of the details of the packet rather than a one-line summary of the packet
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# x Cause Tethereal to print a hex and ASCII dump of the packet data after printing the summary or details
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# r Read packet data from the following infile
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TETHEREAL_ARGS="-nVxr"
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NOTFOUND=0
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for i in "$TETHEREAL" "$EDITCAP" "$CAPINFOS" "$DATE" "$TMP_DIR" ; do
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if [ ! -x $i ]; then
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echo "Couldn't find $i"
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NOTFOUND=1
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fi
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done
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if [ $NOTFOUND -eq 1 ]; then
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exit 1
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fi
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# Make sure we have a valid test set
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FOUND=0
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for CF in "$@" ; do
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"$CAPINFOS" "$CF" > /dev/null 2>&1 && FOUND=1
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if [ $FOUND -eq 1 ] ; then break ; fi
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done
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if [ $FOUND -eq 0 ] ; then
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cat <<FIN
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Error: No valid capture files found.
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Usage: `basename $0` capture file 1 [capture file 2]...
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FIN
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exit 1
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fi
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echo "Running $TETHEREAL with args: $TETHEREAL_ARGS"
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echo ""
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# Not yet - properly handle empty filenames
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#trap "rm $TMP_DIR/$TMP_FILE $TMP_DIR/$FUZZ_FILE; exit 1" 1 2 15
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# Iterate over our capture files.
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PASS=0
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while [ 1 ] ; do
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PASS=`expr $PASS + 1`
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echo "Pass $PASS:"
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for CF in "$@" ; do
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echo -n " $CF: "
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"$CAPINFOS" "$CF" > /dev/null 2>&1
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if [ $? -ne 0 ] ; then
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echo "Not a valid capture file"
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continue
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fi
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DISSECTOR_BUG=0
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"$EDITCAP" -E $ERR_PROB "$CF" $TMP_DIR/$TMP_FILE > /dev/null 2>&1
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if [ $? -ne 0 ] ; then
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"$EDITCAP" -E $ERR_PROB -T ether "$CF" $TMP_DIR/$TMP_FILE \
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> /dev/null 2>&1
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if [ $? -ne 0 ] ; then
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echo "Invalid format for editcap"
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continue
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fi
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fi
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"$TETHEREAL" $TETHEREAL_ARGS $TMP_DIR/$TMP_FILE \
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> /dev/null 2> $TMP_DIR/$ERR_FILE
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RETVAL=$?
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grep -i "dissector bug" $TMP_DIR/$ERR_FILE \
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> /dev/null 2>&1 && DISSECTOR_BUG=1
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if [ $RETVAL -ne 0 -o $DISSECTOR_BUG -ne 0 ] ; then
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FUZZ_FILE="fuzz-`$DATE +%Y-%m-%d`-$$.pcap"
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echo " ERROR"
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echo -e "Processing failed. Capture info follows:\n"
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mv $TMP_DIR/$TMP_FILE $TMP_DIR/$FUZZ_FILE
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echo " Output file: $TMP_DIR/$FUZZ_FILE"
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if [ $DISSECTOR_BUG -ne 0 ] ; then
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echo -e "stderr follows:\n"
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cat $TMP_DIR/$ERR_FILE
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fi
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exit 1
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fi
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echo " OK"
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done
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done
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