# Copyright (C) 2012, 2013, 2015, 2016 Internet Systems Consortium, Inc. ("ISC") # # Permission to use, copy, modify, and/or distribute this software for any # purpose with or without fee is hereby granted, provided that the above # copyright notice and this permission notice appear in all copies. # # THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH # REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY # AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, # INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM # LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE # OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR # PERFORMANCE OF THIS SOFTWARE. # test response rate limiting SYSTEMTESTTOP=.. . $SYSTEMTESTTOP/conf.sh #set -x ns1=10.53.0.1 # root, defining the others ns2=10.53.0.2 # test server ns3=10.53.0.3 # secondary test server ns7=10.53.0.7 # whitelisted client USAGE="$0: [-x]" while getopts "x" c; do case $c in x) set -x;; *) echo "$USAGE" 1>&2; exit 1;; esac done shift `expr $OPTIND - 1 || true` if test "$#" -ne 0; then echo "$USAGE" 1>&2 exit 1 fi # really quit on control-C trap 'exit 1' 1 2 15 ret=0 setret () { ret=1 echo "$*" } # Wait until soon after the start of a second to make results consistent. # The start of a second credits a rate limit. # This would be far easier in C or by assuming a modern version of perl. sec_start () { START=`date` while true; do NOW=`date` if test "$START" != "$NOW"; then return fi $PERL -e 'select(undef, undef, undef, 0.05)' || true done } # turn off ${HOME}/.digrc HOME=/dev/null; export HOME # $1=number of tests $2=target domain $3=dig options QNUM=1 burst () { BURST_LIMIT=$1; shift BURST_DOM_BASE="$1"; shift XCNT=$CNT CNT='XXX' eval FILENAME="mdig.out-$BURST_DOM_BASE" CNT=$XCNT DOMS="" CNTS=`$PERL -e 'for ( $i = 0; $i < '$BURST_LIMIT'; $i++) { printf "%03d\n", '$QNUM' + $i; }'` for CNT in $CNTS do eval BURST_DOM="$BURST_DOM_BASE" DOMS="$DOMS $BURST_DOM" done ARGS="+nocookie +continue +time=1 +tries=1 -p 5300 $* @$ns2 $DOMS" $MDIG $ARGS 2>&1 | tee -a full-$FILENAME | sed -n -e '/^;; AUTHORITY/,/^$/d' \ -e '/^;; ADDITIONAL/,/^$/d' \ -e 's/^[^;].* \([^ ]\{1,\}\)$/\1/p' \ -e 's/;; flags.* tc .*/TC/p' \ -e 's/;; .* status: NXDOMAIN.*/NXDOMAIN/p' \ -e 's/;; .* status: NOERROR.*/NOERROR/p' \ -e 's/;; .* status: SERVFAIL.*/SERVFAIL/p' \ -e 's/response failed with timed out.*/drop/p' \ -e 's/;; communications error to.*/drop/p' >> $FILENAME QNUM=`expr $QNUM + $BURST_LIMIT` } # compare integers $1 and $2; ensure the difference is no more than $3 range () { $PERL -e 'if (abs(int($ARGV[0]) - int($ARGV[1])) > int($ARGV[2])) { exit(1) }' $1 $2 $3 } # $1=domain $2=IP address $3=# of IP addresses $4=TC $5=drop # $6=NXDOMAIN $7=SERVFAIL or other errors ck_result() { BAD=no ADDRS=`egrep "^$2$" mdig.out-$1 2>/dev/null | wc -l` # count simple truncated and truncated NXDOMAIN as TC TC=`egrep "^TC|NXDOMAINTC$" mdig.out-$1 2>/dev/null | wc -l` DROP=`egrep "^drop$" mdig.out-$1 2>/dev/null | wc -l` # count NXDOMAIN and truncated NXDOMAIN as NXDOMAIN NXDOMAIN=`egrep "^NXDOMAIN|NXDOMAINTC$" mdig.out-$1 2>/dev/null | wc -l` SERVFAIL=`egrep "^SERVFAIL$" mdig.out-$1 2>/dev/null | wc -l` NOERROR=`egrep "^NOERROR$" mdig.out-$1 2>/dev/null | wc -l` range $ADDRS "$3" 1 || setret "I:"$ADDRS" instead of $3 '$2' responses for $1" && BAD=yes range $TC "$4" 1 || setret "I:"$TC" instead of $4 truncation responses for $1" && BAD=yes range $DROP "$5" 1 || setret "I:"$DROP" instead of $5 dropped responses for $1" && BAD=yes range $NXDOMAIN "$6" 1 || setret "I:"$NXDOMAIN" instead of $6 NXDOMAIN responses for $1" && BAD=yes range $SERVFAIL "$7" 1 || setret "I:"$SERVFAIL" instead of $7 error responses for $1" && BAD=yes range $NOERROR "$8" 1 || setret "I:"$NOERROR" instead of $8 NOERROR responses for $1" && BAD=yes if test -z "$BAD"; then rm -f mdig.out-$1 fi } ckstats () { LABEL="$1"; shift TYPE="$1"; shift EXPECTED="$1"; shift C=`sed -n -e "s/[ ]*\([0-9]*\).responses $TYPE for rate limits.*/\1/p" \ ns2/named.stats | tail -1` C=`expr 0$C + 0` if test "$C" -ne $EXPECTED; then setret "I:wrong $LABEL $TYPE statistics of $C instead of $EXPECTED" fi } ######### sec_start # Tests of referrals to "." must be done before the hints are loaded # or with "additional-from-cache no" burst 5 a1.tld3 +norec # basic rate limiting burst 3 a1.tld2 # delay allows an additional response. sleep 1 burst 10 a1.tld2 # Request 30 different qnames to try a wildcard. burst 30 'x$CNT.a2.tld2' # These should be counted and limited but are not. See RT33138. burst 10 'y.x$CNT.a2.tld2' # IP TC drop NXDOMAIN SERVFAIL NOERROR # referrals to "." ck_result a1.tld3 x 0 1 2 0 0 2 # check 13 results including 1 second delay that allows an additional response ck_result a1.tld2 192.0.2.1 3 4 6 0 0 8 # Check the wild card answers. # The parent name of the 30 requests is counted. ck_result 'x*.a2.tld2' 192.0.2.2 2 10 18 0 0 12 # These should be limited but are not. See RT33138. ck_result 'y.x*.a2.tld2' 192.0.2.2 10 0 0 0 0 10 ######### sec_start burst 10 'x.a3.tld3' burst 10 'y$CNT.a3.tld3' burst 10 'z$CNT.a4.tld2' # 10 identical recursive responses are limited ck_result 'x.a3.tld3' 192.0.3.3 2 3 5 0 0 5 # 10 different recursive responses are not limited ck_result 'y*.a3.tld3' 192.0.3.3 10 0 0 0 0 10 # 10 different NXDOMAIN responses are limited based on the parent name. # We count 13 responses because we count truncated NXDOMAIN responses # as both truncated and NXDOMAIN. ck_result 'z*.a4.tld2' x 0 3 5 5 0 0 $RNDC -c $SYSTEMTESTTOP/common/rndc.conf -p 9953 -s $ns2 stats ckstats first dropped 36 ckstats first truncated 21 ######### sec_start burst 10 a5.tld2 +tcp burst 10 a6.tld2 -b $ns7 burst 10 a7.tld4 burst 2 a8.tld2 -t AAAA burst 2 a8.tld2 -t TXT burst 2 a8.tld2 -t SPF # IP TC drop NXDOMAIN SERVFAIL NOERROR # TCP responses are not rate limited ck_result a5.tld2 192.0.2.5 10 0 0 0 0 10 # whitelisted client is not rate limited ck_result a6.tld2 192.0.2.6 10 0 0 0 0 10 # Errors such as SERVFAIL are rate limited. ck_result a7.tld4 x 0 0 8 0 2 0 # NODATA responses are counted as the same regardless of qtype. ck_result a8.tld2 x 0 2 2 0 0 4 $RNDC -c $SYSTEMTESTTOP/common/rndc.conf -p 9953 -s $ns2 stats ckstats second dropped 46 ckstats second truncated 23 ######### sec_start # IP TC drop NXDOMAIN SERVFAIL NOERROR # all-per-second # The qnames are all unique but the client IP address is constant. QNUM=101 burst 60 'all$CNT.a9.tld2' ck_result 'a*.a9.tld2' 192.0.2.8 50 0 10 0 0 50 $RNDC -c $SYSTEMTESTTOP/common/rndc.conf -p 9953 -s $ns2 stats ckstats final dropped 56 ckstats final truncated 23 echo "I:exit status: $ret" #[ $status -eq 0 ] || exit 1 [ $ret -eq 0 ] || echo "I:test failure overridden"