mirror of
https://github.com/bol-van/zapret.git
synced 2024-12-24 07:06:36 +00:00
810 lines
18 KiB
Bash
Executable File
810 lines
18 KiB
Bash
Executable File
#!/bin/sh
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EXEDIR="$(dirname "$0")"
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EXEDIR="$(cd "$EXEDIR"; pwd)"
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ZAPRET_BASE="$EXEDIR"
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[ -n "$QNUM" ] || QNUM=59780
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[ -n "$TPPORT" ] || TPPORT=993
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[ -n "$TPWS_UID" ] || TPWS_UID=1
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[ -n "$NFQWS" ] || NFQWS="$ZAPRET_BASE/nfq/nfqws"
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[ -n "$DVTWS" ] || DVTWS="$ZAPRET_BASE/nfq/dvtws"
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[ -n "$TPWS" ] || TPWS="$ZAPRET_BASE/tpws/tpws"
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[ -n "$MDIG" ] || MDIG="$ZAPRET_BASE/mdig/mdig"
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[ -n "$DESYNC_MARK" ] || DESYNC_MARK=0x40000000
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[ -n "$IPFW_RULE_NUM" ] || IPFW_RULE_NUM=1
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[ -n "$IPFW_DIVERT_PORT" ] || IPFW_DIVERT_PORT=59780
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[ -n "$DOMAIN" ] || DOMAIN=rutracker.org
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[ -n "$CURL_MAX_TIME" ] || CURL_MAX_TIME=5
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[ -n "$MIN_TTL" ] || MIN_TTL=1
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[ -n "$MAX_TTL" ] || MAX_TTL=12
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HDRTEMP=/tmp/zapret-hdr.txt
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ECHON="echo -n"
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DNSCHECK_DNS="8.8.8.8 1.1.1.1 77.88.8.8"
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DNSCHECK_DOM="pornhub.com putinhuylo.com rutracker.org nnmclub.to startmail.com"
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DNSCHECK_DIG1=/tmp/dig1.txt
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DNSCHECK_DIG2=/tmp/dig2.txt
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DNSCHECK_DIGS=/tmp/digs.txt
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exists()
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{
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which $1 >/dev/null 2>/dev/null
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}
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killwait()
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{
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# $1 - signal (-9, -2, ...)
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# $2 - pid
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kill $1 $2
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# suppress job kill message
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wait $2 2>/dev/null
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}
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exitp()
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{
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local A
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echo
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echo press enter to continue
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read A
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exit $1
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}
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read_yes_no()
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{
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# $1 - default (Y/N)
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local A
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read A
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[ -z "$A" ] || ([ "$A" != "Y" ] && [ "$A" != "y" ] && [ "$A" != "N" ] && [ "$A" != "n" ]) && A=$1
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[ "$A" = "Y" ] || [ "$A" = "y" ] || [ "$A" = "1" ]
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}
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ask_yes_no()
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{
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# $1 - default (Y/N or 0/1)
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# $2 - text
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local DEFAULT=$1
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[ "$1" = "1" ] && DEFAULT=Y
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[ "$1" = "0" ] && DEFAULT=N
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[ -z "$DEFAULT" ] && DEFAULT=N
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$ECHON "$2 (default : $DEFAULT) (Y/N) ? "
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read_yes_no $DEFAULT
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}
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ask_yes_no_var()
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{
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# $1 - variable name for answer : 0/1
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# $2 - text
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local DEFAULT
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eval DEFAULT="\$$1"
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if ask_yes_no "$DEFAULT" "$2"; then
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eval $1=1
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else
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eval $1=0
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fi
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}
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require_root()
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{
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echo \* checking privileges
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[ $(id -u) -ne "0" ] && {
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echo root is required
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exists sudo && exec sudo "$0"
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exists su && exec su -c "$0"
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echo su or sudo not found
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exitp 2
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}
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}
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IPT()
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{
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$IPTABLES -C "$@" >/dev/null 2>/dev/null || $IPTABLES -I "$@"
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}
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IPT_DEL()
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{
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$IPTABLES -C "$@" >/dev/null 2>/dev/null && $IPTABLES -D "$@"
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}
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IPFW_ADD()
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{
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ipfw -qf add $IPFW_RULE_NUM "$@"
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}
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IPFW_DEL()
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{
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ipfw -qf delete $IPFW_RULE_NUM
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}
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check_system()
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{
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echo \* checking system
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UNAME=$(uname)
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case "$UNAME" in
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Linux)
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PKTWS="$NFQWS"
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PKTWSD=nfqws
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;;
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FreeBSD)
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PKTWS="$DVTWS"
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PKTWSD=dvtws
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;;
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*)
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echo $UNAME not supported
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exitp 5
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esac
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}
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freebsd_module_loaded()
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{
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# $1 - module name
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kldstat | grep -q "${1}.ko"
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}
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freebsd_modules_loaded()
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{
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# $1,$2,$3, ... - module names
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while [ -n "$1" ]; do
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freebsd_module_loaded $1 || return 1
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shift
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done
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return 0
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}
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check_prerequisites()
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{
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echo \* checking prerequisites
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[ -x "$PKTWS" ] && [ -x "$TPWS" ] && [ -x "$MDIG" ] || {
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echo $PKTWS or $TPWS or $MDIG is not available. run \"$ZAPRET_BASE/install_bin.sh\" or make -C \"$ZAPRET_BASE\"
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exitp 6
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}
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local progs='curl'
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case "$UNAME" in
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Linux)
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progs="$progs iptables ip6tables"
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;;
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FreeBSD)
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progs="$progs ipfw"
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freebsd_modules_loaded ipfw ipdivert || {
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echo ipfw or ipdivert kernel module not loaded
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exitp 6
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}
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[ "$(sysctl -qn net.inet.ip.fw.enable)" = 0 -o "$(sysctl -qn net.inet6.ip6.fw.enable)" = 0 ] && {
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echo ipfw is disabled. use : ipfw enable firewall
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exitp 6
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}
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;;
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esac
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for prog in $progs; do
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exists $prog || {
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echo $prog does not exist. please install
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exitp 6
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}
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done
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if exists nslookup; then
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LOOKUP=nslookup
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elif exists host; then
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LOOKUP=host
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else
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echo nslookup or host does not exist. please install
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exitp 6
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fi
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}
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curl_supports_tls13()
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{
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curl --tlsv1.3 -Is -o /dev/null http://$LOCALHOST_IPT:65535 2>/dev/null
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# return code 2 = init failed. likely bad command line options
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[ $? = 2 ] && return 1
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# curl can have tlsv1.3 key present but ssl library without TLS 1.3 support
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# this is online test because there's no other way to trigger library incompatibility case
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curl --tlsv1.3 -Is -o /dev/null https://w3.org 2>/dev/null
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[ $? != 4 ]
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}
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curl_supports_tlsmax()
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{
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# supported only in OpenSSL
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curl --version | grep -q OpenSSL || return 1
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# supported since curl 7.54
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curl --tls-max 1.2 -Is -o /dev/null http://$LOCALHOST_IPT:65535 2>/dev/null
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# return code 2 = init failed. likely bad command line options
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[ $? != 2 ]
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}
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hdrfile_http_code()
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{
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# $1 - hdr file
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sed -nre '1,1 s/^HTTP\/1\.[0,1] ([0-9]+) .*$/\1/p' "$1"
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}
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hdrfile_location()
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{
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# $1 - hdr file
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# some DPIs return CRLF line ending
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tr -d '\015' <"$1" | sed -nre 's/^[Ll][Oo][Cc][Aa][Tt][Ii][Oo][Nn]:[ \t]*([^ \t]*)[ \t]*$/\1/p'
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}
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curl_test_http()
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{
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# $1 - ip version : 4/6
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# $2 - domain name
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local code loc
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curl -${1}SsD "$HDRTEMP" --max-time $CURL_MAX_TIME $CURL_OPT "http://$2" -o /dev/null 2>&1 || {
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code=$?
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rm -f "$HDRTEMP"
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return $code
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}
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code=$(hdrfile_http_code "$HDRTEMP")
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[ "$code" = 301 -o "$code" = 302 -o "$code" = 307 -o "$code" = 308 ] && {
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loc=$(hdrfile_location "$HDRTEMP")
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echo "$loc" | grep -qE "^https?://.*$2(/|$)" ||
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echo "$loc" | grep -vqE '^https?://' || {
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echo suspicious redirection to : $loc
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rm -f "$HDRTEMP"
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return 254
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}
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}
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rm -f "$HDRTEMP"
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return 0
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}
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curl_test_https_tls12()
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{
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# $1 - ip version : 4/6
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# $2 - domain name
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# prevent using QUIC if available in curl
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# do not use tls 1.3 to make sure server certificate is not encrypted
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curl -${1}Ss --max-time $CURL_MAX_TIME $CURL_OPT --http1.1 --tlsv1.2 $TLSMAX12 "https://$2" -o /dev/null 2>&1
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}
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curl_test_https_tls13()
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{
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# $1 - ip version : 4/6
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# $2 - domain name
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# prevent using QUIC if available in curl
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# force TLS1.3 mode
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curl -${1}Ss --max-time $CURL_MAX_TIME $CURL_OPT --http1.1 --tlsv1.3 $TLSMAX13 "https://$2" -o /dev/null 2>&1
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}
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pktws_ipt_prepare()
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{
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# $1 - port
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case "$UNAME" in
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Linux)
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IPT POSTROUTING -t mangle -p tcp --dport $1 -m mark ! --mark $DESYNC_MARK/$DESYNC_MARK -j NFQUEUE --queue-num $QNUM
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;;
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FreeBSD)
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IPFW_ADD divert $IPFW_DIVERT_PORT tcp from me to any 80,443 out not diverted not sockarg
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;;
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esac
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}
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pktws_ipt_unprepare()
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{
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# $1 - port
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case "$UNAME" in
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Linux)
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IPT_DEL POSTROUTING -t mangle -p tcp --dport $1 -m mark ! --mark $DESYNC_MARK/$DESYNC_MARK -j NFQUEUE --queue-num $QNUM
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;;
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FreeBSD)
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IPFW_DEL
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;;
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esac
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}
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tpws_ipt_prepare()
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{
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# $1 - port
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case "$UNAME" in
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Linux)
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IPT OUTPUT -t nat -p tcp --dport $1 -m owner ! --uid-owner $TPWS_UID -j DNAT --to $LOCALHOST_IPT:$TPPORT
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;;
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FreeBSD)
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if [ "$IPV" = 4 ]; then
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IPFW_ADD fwd 127.0.0.1,$TPPORT tcp from me to any 80,443 proto ip4 not uid $TPWS_UID
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else
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IPFW_ADD fwd ::1,$TPPORT tcp from me to any 80,443 proto ip6 not uid $TPWS_UID
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fi
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;;
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esac
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}
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tpws_ipt_unprepare()
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{
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# $1 - port
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case "$UNAME" in
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Linux)
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IPT_DEL OUTPUT -t nat -p tcp --dport $1 -m owner ! --uid-owner $TPWS_UID -j DNAT --to $LOCALHOST_IPT:$TPPORT
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;;
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FreeBSD)
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IPFW_DEL
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;;
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esac
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}
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pktws_start()
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{
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case "$UNAME" in
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Linux)
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"$NFQWS" --dpi-desync-fwmark=$DESYNC_MARK --qnum=$QNUM "$@" >/dev/null &
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;;
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FreeBSD)
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"$DVTWS" --port=$IPFW_DIVERT_PORT "$@" >/dev/null &
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;;
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esac
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PID=$!
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}
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tpws_start()
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{
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"$TPWS" --uid $TPWS_UID:$TPWS_UID --bind-addr=$LOCALHOST --port=$TPPORT "$@" >/dev/null &
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PID=$!
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# give some time to initialize
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sleep 1
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}
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ws_kill()
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{
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[ -z "$PID" ] || {
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killwait -9 $PID 2>/dev/null
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PID=
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}
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}
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curl_test()
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{
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# $1 - test function
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# $2 - domain
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local code=0 n=0
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while [ $n -lt $REPEATS ]; do
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n=$(($n+1))
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[ $REPEATS -gt 1 ] && $ECHON "[attempt $n] "
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$1 $IPV $2 && {
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[ $REPEATS -gt 1 ] && echo 'AVAILABLE'
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continue
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}
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code=$?
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done
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if [ $code = 254 ]; then
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echo "UNAVAILABLE"
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elif [ $code = 0 ]; then
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echo '!!!!! AVAILABLE !!!!!'
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else
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echo "UNAVAILABLE code=$code"
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fi
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return $code
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}
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ws_curl_test()
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{
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# $1 - ws start function
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# $2 - test function
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# $3 - domain
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# $4,$5,$6, ... - ws params
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local code ws_start=$1 testf=$2 dom=$3
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shift
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shift
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shift
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$ws_start "$@"
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curl_test $testf $dom
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code=$?
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ws_kill
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return $code
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}
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tpws_curl_test()
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{
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# $1 - test function
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# $2 - domain
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# $3,$4,$5, ... - tpws params
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echo - checking tpws $3 $4 $5 $6 $7 $8 $9
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ws_curl_test tpws_start "$@"
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}
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pktws_curl_test()
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{
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# $1 - test function
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# $2 - domain
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# $3,$4,$5, ... - nfqws/dvtws params
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echo - checking $PKTWSD $3 $4 $5 $6 $7 $8 $9
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ws_curl_test pktws_start "$@"
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}
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pktws_check_domain_bypass()
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{
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# $1 - test function
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# $2 - encrypted test : 1/0
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# $3 - domain
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local strategy tests='fake' ttls s sec="$2"
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[ "$sec" = 0 ] && {
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for s in '--hostcase' '--hostspell=hoSt' '--hostnospace' '--domcase'; do
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pktws_curl_test $1 $3 $s && strategy="${strategy:-$s}"
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done
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}
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s="--dpi-desync=split2"
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if pktws_curl_test $1 $3 $s; then
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strategy="${strategy:-$s}"
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else
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tests="$tests split fake,split2 fake,split"
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[ "$sec" = 0 ] && {
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s="$s --hostcase"
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pktws_curl_test $1 $3 $s && strategy="${strategy:-$s}"
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}
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for pos in 1 3 4 5 10 50 100; do
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s="--dpi-desync=split2 --dpi-desync-split-pos=$pos"
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if pktws_curl_test $1 $3 $s; then
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strategy="${strategy:-$s}"
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break
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elif [ "$sec" = 0 ]; then
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s="$s --hostcase"
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pktws_curl_test $1 $3 $s && strategy="${strategy:-$s}"
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fi
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done
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fi
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s="--dpi-desync=disorder2"
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if pktws_curl_test $1 $3 $s; then
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strategy="${strategy:-$s}"
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else
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tests="$tests disorder fake,disorder2 fake,disorder"
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fi
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ttls=$(seq -s ' ' $MIN_TTL $MAX_TTL)
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for e in '' '--wssize 1:6'; do
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[ -n "$e" ] && {
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pktws_curl_test $1 $3 $e && strategy="${strategy:-$e}"
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for desync in split2 disorder2; do
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s="--dpi-desync=$desync $e"
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pktws_curl_test $1 $3 $s && strategy="${strategy:-$s}"
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done
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}
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for desync in $tests; do
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for ttl in $ttls; do
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s="--dpi-desync=$desync --dpi-desync-ttl=$ttl $e"
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pktws_curl_test $1 $3 $s && {
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strategy="${strategy:-$s}"
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break
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}
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done
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for fooling in badsum md5sig badseq; do
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s="--dpi-desync=$desync --dpi-desync-fooling=$fooling $e"
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if pktws_curl_test $1 $3 $s ; then
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strategy="${strategy:-$s}"
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[ "$fooling" = "md5sig" ] && echo 'WARNING ! although md5sig fooling worked it will not work on all sites. it typically works only on linux servers.'
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fi
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done
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done
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# do not do wssize test for http. it's useless
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[ "$sec" = 1 ] || break
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done
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echo
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if [ -n "$strategy" ]; then
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echo "!!!!! working strategy found : $PKTWSD $strategy !!!!!"
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return 0
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else
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echo 'working strategy not found'
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return 1
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fi
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}
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tpws_check_domain_bypass()
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{
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# $1 - test function
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# $2 - encrypted test : 1/0
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# $3 - domain
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local s strategy sec="$2"
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if [ "$sec" = 0 ]; then
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for s in '--hostcase' '--hostspell=hoSt' '--split-http-req=method' '--split-http-req=method --hostcase' '--split-http-req=host' '--split-http-req=host --hostcase' \
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'--hostdot' '--hosttab' '--hostnospace' '--methodspace' '--methodeol' '--unixeol' \
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'--hostpad=1024' '--hostpad=2048' '--hostpad=4096' '--hostpad=8192' '--hostpad=16384'; do
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tpws_curl_test $1 $3 $s && strategy="${strategy:-$s}"
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done
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else
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for pos in 1 2 3 4 5 10 50 100; do
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s="--split-pos=$pos"
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tpws_curl_test $1 $3 $s && {
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strategy="${strategy:-$s}"
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break
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}
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done
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fi
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echo
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if [ -n "$strategy" ]; then
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echo "!!!!! working strategy found : tpws $strategy !!!!!"
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return 0
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else
|
|
echo 'working strategy not found'
|
|
return 1
|
|
fi
|
|
}
|
|
|
|
check_domain()
|
|
{
|
|
# $1 - test function
|
|
# $2 - port
|
|
# $3 - encrypted test : 1/0
|
|
# $4 - domain
|
|
|
|
local code
|
|
|
|
echo
|
|
echo \* $1 $4
|
|
|
|
# in case was interrupted before
|
|
pktws_ipt_unprepare $2
|
|
tpws_ipt_unprepare $2
|
|
ws_kill
|
|
|
|
echo "- checking without DPI bypass"
|
|
curl_test $1 $4 && return
|
|
code=$?
|
|
for c in 1 2 3 4 6 27 ; do
|
|
[ $code = $c ] && return
|
|
done
|
|
|
|
echo
|
|
|
|
echo preparing tpws redirection
|
|
tpws_ipt_prepare $2
|
|
|
|
tpws_check_domain_bypass $1 $3 $4
|
|
|
|
echo clearing tpws redirection
|
|
tpws_ipt_unprepare $2
|
|
|
|
echo
|
|
|
|
echo preparing $PKTWSD redirection
|
|
pktws_ipt_prepare $2
|
|
|
|
pktws_check_domain_bypass $1 $3 $4
|
|
|
|
echo clearing $PKTWSD redirection
|
|
pktws_ipt_unprepare $2
|
|
}
|
|
check_domain_http()
|
|
{
|
|
# $1 - domain
|
|
check_domain curl_test_http 80 0 $1
|
|
}
|
|
check_domain_https_tls12()
|
|
{
|
|
# $1 - domain
|
|
check_domain curl_test_https_tls12 443 1 $1
|
|
}
|
|
check_domain_https_tls13()
|
|
{
|
|
# $1 - domain
|
|
check_domain curl_test_https_tls13 443 1 $1
|
|
}
|
|
|
|
configure_ip_version()
|
|
{
|
|
if [ "$IPV" = 6 ]; then
|
|
IPTABLES=ip6tables
|
|
LOCALHOST=::1
|
|
LOCALHOST_IPT=[::1]
|
|
else
|
|
IPTABLES=iptables
|
|
LOCALHOST=127.0.0.1
|
|
LOCALHOST_IPT=127.0.0.1
|
|
fi
|
|
}
|
|
configure_curl_opt()
|
|
{
|
|
TLSMAX12=
|
|
TLSMAX13=
|
|
curl_supports_tlsmax && {
|
|
TLSMAX12="--tls-max 1.2"
|
|
TLSMAX13="--tls-max 1.3"
|
|
}
|
|
TLS13=
|
|
curl_supports_tls13 && TLS13=1
|
|
}
|
|
|
|
ask_params()
|
|
{
|
|
echo
|
|
echo NOTE ! this test should be run with zapret or any other bypass software disabled, without VPN
|
|
|
|
$ECHON "test this domain (default: $DOMAIN) : "
|
|
local dom
|
|
read dom
|
|
[ -n "$dom" ] && DOMAIN=$dom
|
|
|
|
$ECHON "ip protocol version - 4 or 6 (default: 4) : "
|
|
read IPV
|
|
[ -n "$IPV" ] || IPV=4
|
|
[ "$IPV" = 4 -o "$IPV" = 6 ] || {
|
|
echo invalid ip version. should be 4 or 6.
|
|
exitp 1
|
|
}
|
|
configure_ip_version
|
|
configure_curl_opt
|
|
|
|
ENABLE_HTTP=1
|
|
ask_yes_no_var ENABLE_HTTP "check http"
|
|
|
|
[ -n "$TLSMAX12" ] || echo "WARNING ! your curl version or TLS library does not support tls-max option. TLS 1.2 tests may use TLS 1.3+ protocols"
|
|
|
|
ENABLE_HTTPS_TLS12=1
|
|
ask_yes_no_var ENABLE_HTTPS_TLS12 "check https tls 1.2"
|
|
|
|
ENABLE_HTTPS_TLS13=0
|
|
echo
|
|
if [ -n "$TLS13" ]; then
|
|
echo "TLS 1.3 is the new standard for encrypted communications over TCP"
|
|
echo "its the most important feature for DPI bypass is encrypted TLS ServerHello"
|
|
echo "more and more sites enable TLS 1.3 but still there're many sites with only TLS 1.2 support"
|
|
echo "with TLS 1.3 more DPI bypass strategies can work but they may not apply to all sites"
|
|
echo "if a strategy works with TLS 1.2 it will also work with TLS 1.3"
|
|
echo "if nothing works with TLS 1.2 this test may find TLS1.3 only strategies"
|
|
echo "make sure that $DOMAIN supports TLS 1.3 otherwise all test will return an error"
|
|
ask_yes_no_var ENABLE_HTTPS_TLS13 "check https tls 1.3"
|
|
else
|
|
echo "installed curl version does not support TLS 1.3 . tests disabled."
|
|
fi
|
|
|
|
IGNORE_CA=0
|
|
CURL_OPT=
|
|
[ $ENABLE_HTTPS_TLS13 = 1 -o $ENABLE_HTTPS_TLS12 = 1 ] && {
|
|
echo
|
|
echo "on limited systems like openwrt CA certificates might not be installed to preserve space"
|
|
echo "in such a case curl cannot verify server certificate and you should either install ca-bundle or disable verification"
|
|
echo "however disabling verification will break https check if ISP does MitM attack and substitutes server certificate"
|
|
ask_yes_no_var IGNORE_CA "do not verify server certificate"
|
|
[ "$IGNORE_CA" = 1 ] && CURL_OPT=-k
|
|
}
|
|
|
|
echo
|
|
echo "sometimes ISPs use multiple DPIs or load balancing. bypass strategies may work unstable."
|
|
$ECHON "how many times to repeat each test (default: 1) : "
|
|
read REPEATS
|
|
REPEATS=$((0+${REPEATS:-1}))
|
|
[ "$REPEATS" = 0 ] && {
|
|
echo invalid repeat count
|
|
exitp 1
|
|
}
|
|
|
|
echo
|
|
}
|
|
|
|
|
|
|
|
pingtest()
|
|
{
|
|
ping -c 1 -W 1 $1 >/dev/null
|
|
}
|
|
dnstest()
|
|
{
|
|
# $1 - dns server. empty for system resolver
|
|
"$LOOKUP" w3.org $1 >/dev/null 2>/dev/null
|
|
}
|
|
find_working_public_dns()
|
|
{
|
|
for dns in $DNSCHECK_DNS; do
|
|
pingtest $dns && dnstest $dns && {
|
|
PUBDNS=$dns
|
|
return 0
|
|
}
|
|
done
|
|
return 1
|
|
}
|
|
lookup4()
|
|
{
|
|
# $1 - domain
|
|
# $2 - DNS
|
|
case "$LOOKUP" in
|
|
nslookup)
|
|
nslookup $1 $2 | sed -n '/Name:/,$p' | grep ^Address | grep -oE '([0-9]{1,3}\.){3}[0-9]{1,3}'
|
|
;;
|
|
host)
|
|
host -t A $1 $2 | grep "has address" | grep -oE '([0-9]{1,3}\.){3}[0-9]{1,3}'
|
|
;;
|
|
esac
|
|
}
|
|
check_dns_spoof()
|
|
{
|
|
# $1 - domain
|
|
# $2 - public DNS
|
|
echo $1 | "$MDIG" --family=4 >"$DNSCHECK_DIG1"
|
|
lookup4 $1 $2 >"$DNSCHECK_DIG2"
|
|
# check whether system resolver returns anything other than public DNS
|
|
grep -qvFf "$DNSCHECK_DIG2" "$DNSCHECK_DIG1"
|
|
}
|
|
check_dns_cleanup()
|
|
{
|
|
rm -f "$DNSCHECK_DIG1" "$DNSCHECK_DIG2" "$DNSCHECK_DIGS" 2>/dev/null
|
|
}
|
|
check_dns()
|
|
{
|
|
local C1 C2
|
|
|
|
echo \* checking DNS
|
|
|
|
[ -f "$DNSCHECK_DIGS" ] && rm -f "$DNSCHECK_DIGS"
|
|
|
|
dnstest || {
|
|
echo -- DNS is not working. It's either misconfigured or blocked or you don't have inet access.
|
|
return 1
|
|
}
|
|
echo system DNS is working
|
|
|
|
if find_working_public_dns ; then
|
|
echo comparing system resolver to public DNS : $PUBDNS
|
|
for dom in $DNSCHECK_DOM; do
|
|
if check_dns_spoof $dom $PUBDNS ; then
|
|
echo $dom : MISMATCH
|
|
echo -- system resolver :
|
|
cat "$DNSCHECK_DIG1"
|
|
echo -- $PUBDNS :
|
|
cat "$DNSCHECK_DIG2"
|
|
check_dns_cleanup
|
|
echo -- POSSIBLE DNS HIJACK DETECTED. ZAPRET WILL NOT HELP YOU IN CASE DNS IS SPOOFED !!!
|
|
echo -- DNS CHANGE OR DNSCRYPT MAY BE REQUIRED
|
|
return 1
|
|
else
|
|
echo $dom : OK
|
|
cat "$DNSCHECK_DIG1" >>"$DNSCHECK_DIGS"
|
|
fi
|
|
done
|
|
else
|
|
echo no working public DNS was found. looks like public DNS blocked.
|
|
for dom in $DNSCHECK_DOM; do echo $dom; done | "$MDIG" --threads=10 --family=4 >"$DNSCHECK_DIGS"
|
|
fi
|
|
|
|
echo checking resolved IP uniqueness for : $DNSCHECK_DOM
|
|
echo censor\'s DNS can return equal result for multiple blocked domains.
|
|
C1=$(wc -l <"$DNSCHECK_DIGS")
|
|
C2=$(sort -u "$DNSCHECK_DIGS" | wc -l)
|
|
[ "$C1" -eq 0 ] &&
|
|
{
|
|
echo -- DNS is not working. It's either misconfigured or blocked or you don't have inet access.
|
|
check_dns_cleanup
|
|
return 1
|
|
}
|
|
[ "$C1" = "$C2" ] ||
|
|
{
|
|
echo system dns resolver has returned equal IPs for some domains checked above \($C1 total, $C2 unique\)
|
|
echo non-unique IPs :
|
|
sort "$DNSCHECK_DIGS" | uniq -d
|
|
echo -- POSSIBLE DNS HIJACK DETECTED. ZAPRET WILL NOT HELP YOU IN CASE DNS IS SPOOFED !!!
|
|
echo -- DNSCRYPT MAY BE REQUIRED
|
|
check_dns_cleanup
|
|
return 1
|
|
}
|
|
echo all resolved IPs are unique
|
|
echo -- DNS looks good
|
|
echo -- NOTE this check is Russia targeted. In your country other domains may be blocked.
|
|
check_dns_cleanup
|
|
return 0
|
|
}
|
|
|
|
|
|
sigint()
|
|
{
|
|
# make sure we are not in a middle state that impacts connectivity
|
|
echo
|
|
echo terminating...
|
|
[ -n "$IPV" ] && {
|
|
tpws_ipt_unprepare 80
|
|
tpws_ipt_unprepare 443
|
|
pktws_ipt_unprepare 80
|
|
pktws_ipt_unprepare 443
|
|
}
|
|
ws_kill
|
|
exitp 1
|
|
}
|
|
|
|
check_system
|
|
check_prerequisites
|
|
require_root
|
|
check_dns
|
|
ask_params
|
|
|
|
PID=
|
|
trap 'sigint' 2
|
|
[ "$ENABLE_HTTP" = 1 ] && check_domain_http $DOMAIN
|
|
[ "$ENABLE_HTTPS_TLS12" = 1 ] && check_domain_https_tls12 $DOMAIN
|
|
[ "$ENABLE_HTTPS_TLS13" = 1 ] && check_domain_https_tls13 $DOMAIN
|
|
trap - 2
|
|
|
|
exitp 0
|