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blockcheck.sh
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blockcheck.sh
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#!/bin/sh
EXEDIR="$(dirname "$0")"
EXEDIR="$(cd "$EXEDIR"; pwd)"
ZAPRET_BASE="$EXEDIR"
[ -f "$ZAPRET_BASE/config" ] && . "$ZAPRET_BASE/config"
. "$ZAPRET_BASE/common/base.sh"
. "$ZAPRET_BASE/common/dialog.sh"
. "$ZAPRET_BASE/common/elevate.sh"
. "$ZAPRET_BASE/common/fwtype.sh"
. "$ZAPRET_BASE/common/virt.sh"
QNUM=${QNUM:-59780}
SOCKS_PORT=${SOCKS_PORT:-1993}
TPWS_UID=${TPWS_UID:-1}
TPWS_GID=${TPWS_GID:-3003}
NFQWS=${NFQWS:-${ZAPRET_BASE}/nfq/nfqws}
DVTWS=${DVTWS:-${ZAPRET_BASE}/nfq/dvtws}
WINWS=${WINWS:-${ZAPRET_BASE}/nfq/winws}
TPWS=${TPWS:-${ZAPRET_BASE}/tpws/tpws}
MDIG=${MDIG:-${ZAPRET_BASE}/mdig/mdig}
DESYNC_MARK=0x10000000
IPFW_RULE_NUM=${IPFW_RULE_NUM:-1}
IPFW_DIVERT_PORT=${IPFW_DIVERT_PORT:-59780}
DOMAINS=${DOMAINS:-rutracker.org}
CURL_MAX_TIME=${CURL_MAX_TIME:-2}
CURL_MAX_TIME_QUIC=${CURL_MAX_TIME_QUIC:-$CURL_MAX_TIME}
MIN_TTL=${MIN_TTL:-1}
MAX_TTL=${MAX_TTL:-12}
USER_AGENT=${USER_AGENT:-Mozilla}
HTTP_PORT=${HTTP_PORT:-80}
HTTPS_PORT=${HTTPS_PORT:-443}
QUIC_PORT=${QUIC_PORT:-443}
HDRTEMP=/tmp/zapret-hdr.txt
NFT_TABLE=blockcheck
DNSCHECK_DNS=${DNSCHECK_DNS:-8.8.8.8 1.1.1.1 77.88.8.1}
DNSCHECK_DOM=${DNSCHECK_DOM:-pornhub.com putinhuylo.com rutracker.org www.torproject.org bbc.com}
DNSCHECK_DIG1=/tmp/dig1.txt
DNSCHECK_DIG2=/tmp/dig2.txt
DNSCHECK_DIGS=/tmp/digs.txt
unset PF_STATUS
PF_RULES_SAVE=/tmp/pf-zapret-save.conf
unset ALL_PROXY
killwait()
{
# $1 - signal (-9, -2, ...)
# $2 - pid
kill $1 $2
# suppress job kill message
wait $2 2>/dev/null
}
exitp()
{
local A
echo
echo press enter to continue
read A
exit $1
}
pf_is_avail()
{
[ -c /dev/pf ]
}
pf_status()
{
pfctl -qsi | sed -nre "s/^Status: ([^ ]+).*$/\1/p"
}
pf_is_enabled()
{
[ "$(pf_status)" = Enabled ]
}
pf_save()
{
PF_STATUS=0
pf_is_enabled && PF_STATUS=1
[ "$UNAME" = "OpenBSD" ] && pfctl -sr >"$PF_RULES_SAVE"
}
pf_restore()
{
[ -n "$PF_STATUS" ] || return
case "$UNAME" in
OpenBSD)
if [ -f "$PF_RULES_SAVE" ]; then
pfctl -qf "$PF_RULES_SAVE"
else
echo | pfctl -qf -
fi
;;
Darwin)
# it's not possible to save all rules in the right order. hard to reorder. if not ordered pf will refuse to load conf.
pfctl -qf /etc/pf.conf
;;
esac
if [ "$PF_STATUS" = 1 ]; then
pfctl -qe
else
pfctl -qd
fi
}
pf_clean()
{
rm -f "$PF_RULES_SAVE"
}
opf_dvtws_anchor()
{
# $1 - tcp/udp
# $2 - port
local family=inet
[ "$IPV" = 6 ] && family=inet6
echo "set reassemble no"
[ "$1" = tcp ] && echo "pass in quick $family proto $1 from port $2 flags SA/SA divert-packet port $IPFW_DIVERT_PORT no state"
echo "pass in quick $family proto $1 from port $2 no state"
echo "pass out quick $family proto $1 to port $2 divert-packet port $IPFW_DIVERT_PORT no state"
echo "pass"
}
opf_prepare_dvtws()
{
# $1 - tcp/udp
# $2 - port
opf_dvtws_anchor $1 $2 | pfctl -qf -
pfctl -qe
}
cleanup()
{
case "$UNAME" in
OpenBSD)
pf_clean
;;
esac
}
IPT()
{
$IPTABLES -C "$@" >/dev/null 2>/dev/null || $IPTABLES -I "$@"
}
IPT_DEL()
{
$IPTABLES -C "$@" >/dev/null 2>/dev/null && $IPTABLES -D "$@"
}
IPT_ADD_DEL()
{
on_off_function IPT IPT_DEL "$@"
}
IPFW_ADD()
{
ipfw -qf add $IPFW_RULE_NUM "$@"
}
IPFW_DEL()
{
ipfw -qf delete $IPFW_RULE_NUM 2>/dev/null
}
ipt6_has_raw()
{
ip6tables -nL -t raw >/dev/null 2>/dev/null
}
ipt6_has_frag()
{
ip6tables -A OUTPUT -m frag 2>/dev/null || return 1
ip6tables -D OUTPUT -m frag 2>/dev/null
}
ipt_has_nfq()
{
# cannot just check /proc/net/ip_tables_targets because of iptables-nft or modules not loaded yet
iptables -A OUTPUT -t mangle -p 255 -j NFQUEUE --queue-num $QNUM --queue-bypass 2>/dev/null || return 1
iptables -D OUTPUT -t mangle -p 255 -j NFQUEUE --queue-num $QNUM --queue-bypass 2>/dev/null
return 0
}
nft_has_nfq()
{
local res=1
nft delete table ${NFT_TABLE}_test 2>/dev/null
nft add table ${NFT_TABLE}_test 2>/dev/null && {
nft add chain ${NFT_TABLE}_test test
nft add rule ${NFT_TABLE}_test test queue num $QNUM bypass 2>/dev/null && res=0
nft delete table ${NFT_TABLE}_test
}
return $res
}
mdig_resolve()
{
# $1 - ip version 4/6
# $2 - hostname
# windows version of mdig outputs 0D0A line ending. remove 0D.
echo "$2" | "$MDIG" --family=$1 | head -n 1 | tr -d '\r'
}
check_system()
{
echo \* checking system
UNAME=$(uname)
SUBSYS=
local s
# can be passed FWTYPE=iptables to override default nftables preference
case "$UNAME" in
Linux)
PKTWS="$NFQWS"
PKTWSD=nfqws
linux_fwtype
[ "$FWTYPE" = iptables -o "$FWTYPE" = nftables ] || {
echo firewall type $FWTYPE not supported in $UNAME
exitp 5
}
;;
FreeBSD)
PKTWS="$DVTWS"
PKTWSD=dvtws
FWTYPE=ipfw
[ -f /etc/platform ] && read SUBSYS </etc/platform
;;
OpenBSD)
PKTWS="$DVTWS"
PKTWSD=dvtws
FWTYPE=opf
;;
Darwin)
PKTWS="$DVTWS"
PKTWSD=dvtws
FWTYPE=mpf
;;
CYGWIN*)
UNAME=CYGWIN
PKTWS="$WINWS"
PKTWSD=winws
FWTYPE=windivert
;;
*)
echo $UNAME not supported
exitp 5
esac
echo $UNAME${SUBSYS:+/$SUBSYS} detected
echo firewall type is $FWTYPE
}
freebsd_module_loaded()
{
# $1 - module name
kldstat -qm "${1}"
}
freebsd_modules_loaded()
{
# $1,$2,$3, ... - module names
while [ -n "$1" ]; do
freebsd_module_loaded $1 || return 1
shift
done
return 0
}
check_prerequisites()
{
echo \* checking prerequisites
[ "$UNAME" = Darwin -o -x "$PKTWS" ] && [ "$UNAME" = CYGWIN -o -x "$TPWS" ] && [ -x "$MDIG" ] || {
local target
case $UNAME in
Darwin)
target="mac"
;;
OpenBSD)
target="bsd"
;;
esac
echo $PKTWS or $TPWS or $MDIG is not available. run \"$ZAPRET_BASE/install_bin.sh\" or \`make -C \"$ZAPRET_BASE\" $target\`
exitp 6
}
local prog progs='curl'
case "$UNAME" in
Linux)
case "$FWTYPE" in
iptables)
progs="$progs iptables ip6tables"
ipt_has_nfq || {
echo NFQUEUE iptables or ip6tables target is missing. pls install modules.
exitp 6
}
;;
nftables)
nft_has_nfq || {
echo nftables queue support is not available. pls install modules.
exitp 6
}
;;
esac
;;
FreeBSD)
progs="$progs ipfw"
freebsd_modules_loaded ipfw ipdivert || {
echo ipfw or ipdivert kernel module not loaded
exitp 6
}
[ "$(sysctl -qn net.inet.ip.fw.enable)" = 0 -o "$(sysctl -qn net.inet6.ip6.fw.enable)" = 0 ] && {
echo ipfw is disabled. use : ipfw enable firewall
exitp 6
}
pf_is_avail && {
pf_save
[ "$SUBSYS" = "pfSense" ] && {
# pfsense's ipfw may not work without these workarounds
sysctl net.inet.ip.pfil.outbound=ipfw,pf 2>/dev/null
sysctl net.inet.ip.pfil.inbound=ipfw,pf 2>/dev/null
sysctl net.inet6.ip6.pfil.outbound=ipfw,pf 2>/dev/null
sysctl net.inet6.ip6.pfil.inbound=ipfw,pf 2>/dev/null
pfctl -qd
pfctl -qe
pf_restore
}
}
;;
OpenBSD|Darwin)
progs="$progs pfctl"
pf_is_avail || {
echo pf is not available
exitp 6
}
# no divert sockets in MacOS
[ "$UNAME" = "Darwin" ] && SKIP_PKTWS=1
pf_save
;;
CYGWIN)
SKIP_TPWS=1
;;
esac
for prog in $progs; do
exists $prog || {
echo $prog does not exist. please install
exitp 6
}
done
if exists nslookup; then
LOOKUP=nslookup
elif exists host; then
LOOKUP=host
else
echo nslookup or host does not exist. please install
exitp 6
fi
}
curl_translate_code()
{
# $1 - code
printf $1
case $1 in
0) printf ": ok"
;;
1) printf ": unsupported protocol"
;;
2) printf ": early initialization code failed"
;;
3) printf ": the URL was not properly formatted"
;;
4) printf ": feature not supported by libcurl"
;;
5) printf ": could not resolve proxy"
;;
6) printf ": could not resolve host"
;;
7) printf ": could not connect"
;;
8) printf ": invalid server reply"
;;
9) printf ": remote access denied"
;;
27) printf ": out of memory"
;;
28) printf ": operation timed out"
;;
35) printf ": SSL connect error"
;;
esac
}
curl_supports_tls13()
{
local r
curl --tlsv1.3 -Is -o /dev/null --max-time 1 http://127.0.0.1:65535 2>/dev/null
# return code 2 = init failed. likely bad command line options
[ $? = 2 ] && return 1
# curl can have tlsv1.3 key present but ssl library without TLS 1.3 support
# this is online test because there's no other way to trigger library incompatibility case
curl --tlsv1.3 --max-time $CURL_MAX_TIME -Is -o /dev/null https://w3.org 2>/dev/null
r=$?
[ $r != 4 -a $r != 35 ]
}
curl_supports_tlsmax()
{
# supported only in OpenSSL and LibreSSL
curl --version | grep -Fq -e OpenSSL -e LibreSSL -e GnuTLS || return 1
# supported since curl 7.54
curl --tls-max 1.2 -Is -o /dev/null --max-time 1 http://127.0.0.1:65535 2>/dev/null
# return code 2 = init failed. likely bad command line options
[ $? != 2 ]
}
curl_supports_connect_to()
{
curl --connect-to 127.0.0.1:: -o /dev/null --max-time 1 http://127.0.0.1:65535 2>/dev/null
[ "$?" != 2 ]
}
curl_supports_http3()
{
# if it has http3 : curl: (3) HTTP/3 requested for non-HTTPS URL
# otherwise : curl: (2) option --http3-only: is unknown
curl --connect-to 127.0.0.1:: -o /dev/null --max-time 1 --http3-only http://127.0.0.1:65535 2>/dev/null
[ "$?" != 2 ]
}
hdrfile_http_code()
{
# $1 - hdr file
sed -nre '1,1 s/^HTTP\/1\.[0,1] ([0-9]+) .*$/\1/p' "$1"
}
hdrfile_location()
{
# $1 - hdr file
# some DPIs return CRLF line ending
tr -d '\015' <"$1" | sed -nre 's/^[Ll][Oo][Cc][Aa][Tt][Ii][Oo][Nn]:[ ]*([^ ]*)[ ]*$/\1/p'
}
curl_connect_to()
{
# $1 - ip version : 4/6
# $2 - domain name
# $3 - port
local ip=$(mdig_resolve $1 $2)
[ -n "$ip" ] && echo "--connect-to $2::[$ip]${3:+:$3}"
}
curl_with_dig()
{
# $1 - ip version : 4/6
# $2 - domain name
# $3 - port
# $4+ - curl params
local connect_to="$(curl_connect_to $1 $2 $3)"
[ -n "$connect_to" ] || {
echo "could not resolve ipv$1 $2"
return 6
}
shift ; shift ; shift
ALL_PROXY="$ALL_PROXY" curl $connect_to "$@"
}
curl_test_http()
{
# $1 - ip version : 4/6
# $2 - domain name
local code loc
curl_with_dig $1 $2 $HTTP_PORT -SsD "$HDRTEMP" -A "$USER_AGENT" --max-time $CURL_MAX_TIME $CURL_OPT "http://$2" -o /dev/null 2>&1 || {
code=$?
rm -f "$HDRTEMP"
return $code
}
code=$(hdrfile_http_code "$HDRTEMP")
[ "$code" = 301 -o "$code" = 302 -o "$code" = 307 -o "$code" = 308 ] && {
loc=$(hdrfile_location "$HDRTEMP")
echo "$loc" | grep -qE "^https?://.*$2(/|$)" ||
echo "$loc" | grep -vqE '^https?://' || {
echo suspicious redirection $code to : $loc
rm -f "$HDRTEMP"
return 254
}
}
rm -f "$HDRTEMP"
[ "$code" = 400 ] && {
# this can often happen if the server receives fake packets it should not receive
echo http code $code. likely the server receives fakes.
return 254
}
return 0
}
curl_test_https_tls12()
{
# $1 - ip version : 4/6
# $2 - domain name
# do not use tls 1.3 to make sure server certificate is not encrypted
curl_with_dig $1 $2 $HTTPS_PORT -ISs -A "$USER_AGENT" --max-time $CURL_MAX_TIME $CURL_OPT --tlsv1.2 $TLSMAX12 "https://$2" -o /dev/null 2>&1
}
curl_test_https_tls13()
{
# $1 - ip version : 4/6
# $2 - domain name
# force TLS1.3 mode
curl_with_dig $1 $2 $HTTPS_PORT -ISs -A "$USER_AGENT" --max-time $CURL_MAX_TIME $CURL_OPT --tlsv1.3 $TLSMAX13 "https://$2" -o /dev/null 2>&1
}
curl_test_http3()
{
# $1 - ip version : 4/6
# $2 - domain name
# force QUIC only mode without tcp
curl_with_dig $1 $2 $QUIC_PORT -ISs -A "$USER_AGENT" --max-time $CURL_MAX_TIME_QUIC --http3-only $CURL_OPT "https://$2" -o /dev/null 2>&1
}
ipt_scheme()
{
# $1 - 1 - add , 0 - del
# $2 - tcp/udp
# $3 - port
IPT_ADD_DEL $1 OUTPUT -t mangle -p $2 --dport $3 -m mark ! --mark $DESYNC_MARK/$DESYNC_MARK -j NFQUEUE --queue-num $QNUM
# to avoid possible INVALID state drop
[ "$2" = tcp ] && IPT_ADD_DEL $1 INPUT -p $2 --sport $3 ! --syn -j ACCEPT
# for strategies with incoming packets involved (autottl)
IPT_ADD_DEL $1 OUTPUT -p $2 --dport $3 -m conntrack --ctstate INVALID -j ACCEPT
if [ "$IPV" = 6 -a -n "$IP6_DEFRAG_DISABLE" ]; then
# the only way to reliable disable ipv6 defrag. works only in 4.16+ kernels
IPT_ADD_DEL $1 OUTPUT -t raw -p $2 -m frag -j CT --notrack
elif [ "$IPV" = 4 ]; then
# enable fragments
IPT_ADD_DEL $1 OUTPUT -f -j ACCEPT
fi
# enable everything generated by nfqws (works only in OUTPUT, not in FORWARD)
# raw table may not be present
IPT_ADD_DEL $1 OUTPUT -t raw -m mark --mark $DESYNC_MARK/$DESYNC_MARK -j CT --notrack
}
nft_scheme()
{
# $1 - tcp/udp
# $2 - port
nft add table inet $NFT_TABLE
nft "add chain inet $NFT_TABLE postnat { type filter hook output priority 102; }"
nft "add rule inet $NFT_TABLE postnat meta nfproto ipv${IPV} $1 dport $2 mark and $DESYNC_MARK != $DESYNC_MARK queue num $QNUM"
# for strategies with incoming packets involved (autottl)
nft "add chain inet $NFT_TABLE prenat { type filter hook prerouting priority -102; }"
# enable everything generated by nfqws (works only in OUTPUT, not in FORWARD)
nft "add chain inet $NFT_TABLE predefrag { type filter hook output priority -402; }"
nft "add rule inet $NFT_TABLE predefrag meta nfproto ipv${IPV} mark and $DESYNC_MARK !=0 notrack"
}
pktws_ipt_prepare()
{
# $1 - tcp/udp
# $2 - port
case "$FWTYPE" in
iptables)
ipt_scheme 1 $1 $2
;;
nftables)
nft_scheme $1 $2
;;
ipfw)
# disable PF to avoid interferences
pf_is_avail && pfctl -qd
IPFW_ADD divert $IPFW_DIVERT_PORT $1 from me to any $2 proto ip${IPV} out not diverted not sockarg
;;
opf)
opf_prepare_dvtws $1 $2
;;
windivert)
WF="--wf-l3=ipv${IPV} --wf-${1}=$2"
;;
esac
}
pktws_ipt_unprepare()
{
# $1 - tcp/udp
# $2 - port
case "$FWTYPE" in
iptables)
ipt_scheme 0 $1 $2
;;
nftables)
nft delete table inet $NFT_TABLE 2>/dev/null
;;
ipfw)
IPFW_DEL
pf_is_avail && pf_restore
;;
opf)
pf_restore
;;
windivert)
unset WF
;;
esac
}
pktws_ipt_prepare_tcp()
{
# $1 - port
pktws_ipt_prepare tcp $1
case "$FWTYPE" in
iptables)
# for autottl
IPT INPUT -t mangle -p tcp --sport $1 -m connbytes --connbytes-dir=original --connbytes-mode=packets --connbytes 1:1 -j NFQUEUE --queue-num $QNUM
;;
nftables)
# for autottl
nft "add rule inet $NFT_TABLE prenat meta nfproto ipv${IPV} tcp sport $1 ct original packets 1 queue num $QNUM"
;;
ipfw)
# for autottl mode
IPFW_ADD divert $IPFW_DIVERT_PORT tcp from any $1 to me proto ip${IPV} tcpflags syn,ack in not diverted not sockarg
;;
esac
}
pktws_ipt_unprepare_tcp()
{
# $1 - port
pktws_ipt_unprepare tcp $1
case "$FWTYPE" in
iptables)
IPT_DEL INPUT -t mangle -p tcp --sport $1 -m connbytes --connbytes-dir=original --connbytes-mode=packets --connbytes 1:1 -j NFQUEUE --queue-num $QNUM
;;
esac
}
pktws_ipt_prepare_udp()
{
# $1 - port
pktws_ipt_prepare udp $1
}
pktws_ipt_unprepare_udp()
{
# $1 - port
pktws_ipt_unprepare udp $1
}
pktws_start()
{
case "$UNAME" in
Linux)
"$NFQWS" --uid $TPWS_UID:$TPWS_GID --dpi-desync-fwmark=$DESYNC_MARK --qnum=$QNUM "$@" >/dev/null &
;;
FreeBSD|OpenBSD)
"$DVTWS" --port=$IPFW_DIVERT_PORT "$@" >/dev/null &
;;
CYGWIN)
"$WINWS" $WF "$@" >/dev/null &
;;
esac
PID=$!
# give some time to initialize
minsleep
}
tpws_start()
{
"$TPWS" --uid $TPWS_UID:$TPWS_GID --socks --bind-addr=127.0.0.1 --port=$SOCKS_PORT "$@" >/dev/null &
PID=$!
# give some time to initialize
minsleep
}
ws_kill()
{
[ -z "$PID" ] || {
killwait -9 $PID 2>/dev/null
PID=
}
}
curl_test()
{
# $1 - test function
# $2 - domain
local code=0 n=0
while [ $n -lt $REPEATS ]; do
n=$(($n+1))
[ $REPEATS -gt 1 ] && printf "[attempt $n] "
if $1 "$IPV" $2 ; then
[ $REPEATS -gt 1 ] && echo 'AVAILABLE'
else
code=$?
[ "$SCANLEVEL" = quick ] && break
fi
done
if [ $code = 254 ]; then
echo "UNAVAILABLE"
elif [ $code = 0 ]; then
echo '!!!!! AVAILABLE !!!!!'
else
echo "UNAVAILABLE code=$code"
fi
return $code
}
ws_curl_test()
{
# $1 - ws start function
# $2 - test function
# $3 - domain
# $4,$5,$6, ... - ws params
local code ws_start=$1 testf=$2 dom=$3
shift
shift
shift
$ws_start "$@"
curl_test $testf $dom
code=$?
ws_kill
return $code
}
tpws_curl_test()
{
# $1 - test function
# $2 - domain
# $3,$4,$5, ... - tpws params
echo - checking tpws $3 $4 $5 $6 $7 $8 $9
local ALL_PROXY="socks5://127.0.0.1:$SOCKS_PORT"
ws_curl_test tpws_start "$@"
}
pktws_curl_test()
{
# $1 - test function
# $2 - domain
# $3,$4,$5, ... - nfqws/dvtws params
echo - checking $PKTWSD ${WF:+$WF }$3 $4 $5 $6 $7 $8 $9
ws_curl_test pktws_start "$@"
}
xxxws_curl_test_update()
{
# $1 - xxx_curl_test function
# $2 - test function
# $3 - domain
# $4,$5,$6, ... - nfqws/dvtws params
local code xxxf=$1 testf=$2 dom=$3
shift
shift
shift
$xxxf $testf $dom "$@"
code=$?
[ $code = 0 ] && strategy="${strategy:-$@}"
return $code
}
pktws_curl_test_update()
{
xxxws_curl_test_update pktws_curl_test "$@"
}
tpws_curl_test_update()
{
xxxws_curl_test_update tpws_curl_test "$@"
}
report_append()
{
NREPORT=${NREPORT:-0}
eval REPORT_${NREPORT}=\"$@\"
NREPORT=$(($NREPORT+1))
}
report_print()
{
local n=0 s
NREPORT=${NREPORT:-0}
while [ $n -lt $NREPORT ]; do
eval s=\"\${REPORT_$n}\"
echo $s
n=$(($n+1))
done
}
report_strategy()
{
# $1 - test function
# $2 - domain
# $3 - daemon
echo
if [ -n "$strategy" ]; then
echo "!!!!! $1: working strategy found for ipv${IPV} $2 : $3 $strategy !!!!!"
echo
report_append "ipv${IPV} $2 $1 : $3 ${WF:+$WF }$strategy"
return 0
else
echo "$1: $3 strategy for ipv${IPV} $2 not found"
echo
report_append "ipv${IPV} $2 $1 : $3 not working"
return 1
fi
}
test_has_split()
{
contains "$1" split || contains "$1" disorder
}
test_has_fake()
{
contains "$1" fake
}
warn_fool()
{
case "$1" in
md5sig) echo 'WARNING ! although md5sig fooling worked it will not work on all sites. it typically works only on linux servers.' ;;
datanoack) echo 'WARNING ! although datanoack fooling worked it may break NAT and may only work with external IP. Additionally it may require nftables to work correctly.' ;;
esac
}
pktws_curl_test_update_vary()
{
# $1 - test function
# $2 - encrypted test : 0 = plain, 1 - encrypted with server reply risk, 2 - encrypted without server reply risk
# $3 - domain
# $4 - desync mode
# $5,$6,... - strategy
local testf=$1 sec=$2 domain=$3 desync=$4 zerofake split fake
shift; shift; shift; shift
zerofake=http
[ "$sec" = 0 ] || zerofake=tls
zerofake="--dpi-desync-fake-$zerofake=0x00000000"
for fake in '' $zerofake ; do
for split in '' '--dpi-desync-split-pos=1' ; do
pktws_curl_test_update $testf $domain --dpi-desync=$desync "$@" $fake $split && return 0
# split-pos=1 is meaningful for DPIs searching for 16 03 in TLS. no reason to apply to http
[ "$sec" = 1 ] || break
test_has_split $desync || break
done
test_has_fake $desync || break
done
return 1
}
pktws_check_domain_http_bypass_()
{
# $1 - test function
# $2 - encrypted test : 0 = plain, 1 - encrypted with server reply risk, 2 - encrypted without server reply risk
# $3 - domain
local tests='fake' ret ok ttls s f e desync pos fooling frag sec="$2" delta
[ "$sec" = 0 ] && {
for s in '--hostcase' '--hostspell=hoSt' '--hostnospace' '--domcase'; do
pktws_curl_test_update $1 $3 $s
done
}
s="--dpi-desync=split2"
ok=0
pktws_curl_test_update $1 $3 $s
ret=$?
[ "$ret" = 0 ] && {
[ "$SCANLEVEL" = quick ] && return
ok=1
}
[ "$ret" != 0 -o "$SCANLEVEL" = force ] && {
[ "$sec" = 0 ] && pktws_curl_test_update $1 $3 $s --hostcase && [ "$SCANLEVEL" = quick ] && return
for pos in 1 3 4 5 10 50; do
s="--dpi-desync=split2 --dpi-desync-split-pos=$pos"
if pktws_curl_test_update $1 $3 $s; then
[ "$SCANLEVEL" = quick ] && return
ok=1
[ "$SCANLEVEL" = force ] || break
elif [ "$sec" = 0 ]; then
pktws_curl_test_update $1 $3 $s --hostcase && [ "$SCANLEVEL" = quick ] && return
fi
done
}
[ "$ok" = 1 -a "$SCANLEVEL" != force ] || tests="$tests split fake,split2 fake,split"
pktws_curl_test_update $1 $3 --dpi-desync=disorder2
ret=$?
[ "$ret" = 0 -a "$SCANLEVEL" = quick ] && return
[ "$ret" != 0 -o "$SCANLEVEL" = force ] && {
pktws_curl_test_update $1 $3 --dpi-desync=disorder2 --dpi-desync-split-pos=1
ret=$?
[ "$ret" = 0 -a "$SCANLEVEL" = quick ] && return
}
[ "$ret" != 0 -o "$SCANLEVEL" = force ] && tests="$tests disorder fake,disorder2 fake,disorder"
ttls=$(seq -s ' ' $MIN_TTL $MAX_TTL)
for e in '' '--wssize 1:6'; do
[ -n "$e" ] && {
pktws_curl_test_update $1 $3 $e && [ "$SCANLEVEL" = quick ] && return
for desync in split2 disorder2; do
pktws_curl_test_update_vary $1 $2 $3 $desync $e && [ "$SCANLEVEL" = quick ] && return
done
}
for desync in $tests; do
for ttl in $ttls; do
pktws_curl_test_update_vary $1 $2 $3 $desync --dpi-desync-ttl=$ttl $e && {
[ "$SCANLEVEL" = quick ] && return
break
}
done
f=
[ "$UNAME" = "OpenBSD" ] || f="badsum"
f="$f badseq datanoack md5sig"
[ "$IPV" = 6 ] && f="$f hopbyhop hopbyhop2"
for fooling in $f; do
pktws_curl_test_update_vary $1 $2 $3 $desync --dpi-desync-fooling=$fooling $e && {
warn_fool $fooling
[ "$SCANLEVEL" = quick ] && return
}
done
done
[ "$IPV" = 6 ] && {
f="hopbyhop hopbyhop,split2 hopbyhop,disorder2 destopt destopt,split2 destopt,disorder2"
[ -n "$IP6_DEFRAG_DISABLE" ] && f="$f ipfrag1 ipfrag1,split2 ipfrag1,disorder2"
for desync in $f; do
pktws_curl_test_update_vary $1 $2 $3 $desync $e && [ "$SCANLEVEL" = quick ] && return
done
}
for desync in $tests; do
ok=0
for delta in 1 2 3 4 5; do
pktws_curl_test_update_vary $1 $2 $3 $desync --dpi-desync-ttl=1 --dpi-desync-autottl=$delta $e && ok=1
done
[ "$ok" = 1 ] &&
{
echo "WARNING ! although autottl worked it requires testing on multiple domains to find out reliable delta"
echo "WARNING ! if a reliable delta cannot be found it's a good idea not to use autottl"
[ "$SCANLEVEL" = quick ] && return
}
done
s="http_iana_org.bin"
[ "$sec" = 0 ] || s="tls_clienthello_iana_org.bin"
for desync in syndata syndata,split2 syndata,disorder2 syndata,split2 syndata,disorder2 ; do
pktws_curl_test_update_vary $1 $2 $3 $desync $e && [ "$SCANLEVEL" = quick ] && return
pktws_curl_test_update_vary $1 $2 $3 $desync --dpi-desync-fake-syndata="$ZAPRET_BASE/files/fake/$s" $e && [ "$SCANLEVEL" = quick ] && return
done
# do not do wssize test for http and TLS 1.3. it's useless
[ "$sec" = 1 ] || break
done
}
pktws_check_domain_http_bypass()
{
# $1 - test function
# $2 - encrypted test : 0 = plain, 1 - encrypted with server reply risk, 2 - encrypted without server reply risk
# $3 - domain
local strategy
pktws_check_domain_http_bypass_ "$@"
report_strategy $1 $3 $PKTWSD
}
pktws_check_domain_http3_bypass_()
{
# $1 - test function
# $2 - domain
local f desync frag tests rep
for rep in '' 2 5 10 20; do
pktws_curl_test_update $1 $2 --dpi-desync=fake ${rep:+--dpi-desync-repeats=$rep} && [ "$SCANLEVEL" != force ] && {
[ "$SCANLEVEL" = quick ] && return
break
}
done
[ "$IPV" = 6 ] && {
f="hopbyhop destopt"
[ -n "$IP6_DEFRAG_DISABLE" ] && f="$f ipfrag1"
for desync in $f; do
pktws_curl_test_update $1 $2 --dpi-desync=$desync && [ "$SCANLEVEL" = quick ] && return
done
}
# OpenBSD has checksum issues with fragmented packets
[ "$UNAME" != "OpenBSD" ] && [ "$IPV" = 4 -o -n "$IP6_DEFRAG_DISABLE" ] && {
for frag in 8 16 24 32 40 64; do
tests="ipfrag2"
[ "$IPV" = 6 ] && tests="$tests hopbyhop,ipfrag2 destopt,ipfrag2"
for desync in $tests; do
pktws_curl_test_update $1 $2 --dpi-desync=$desync --dpi-desync-ipfrag-pos-udp=$frag && [ "$SCANLEVEL" = quick ] && return
done
done
}
}
pktws_check_domain_http3_bypass()
{
# $1 - test function
# $2 - domain
local strategy
pktws_check_domain_http3_bypass_ "$@"
report_strategy $1 $2 $PKTWSD
}
warn_mss()