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install_easy.sh
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#!/bin/sh
# automated script for easy installing zapret
EXEDIR="$(dirname "$0")"
EXEDIR="$(cd "$EXEDIR"; pwd)"
IPSET_DIR="$EXEDIR/ipset"
ZAPRET_CONFIG="$EXEDIR/config"
ZAPRET_BASE="$EXEDIR"
. "$ZAPRET_CONFIG"
# install target
ZAPRET_TARGET=/opt/zapret
GET_LIST="$IPSET_DIR/get_config.sh"
GET_LIST_PREFIX=/ipset/get_
INIT_SCRIPT=/etc/init.d/zapret
DNSCHECK_DNS="8.8.8.8 1.1.1.1 77.88.8.8"
DNSCHECK_DOM="pornhub.com putinhuylo.com rutracker.org nnmclub.to protonmail.com"
DNSCHECK_DIG1=/tmp/dig1.txt
DNSCHECK_DIG2=/tmp/dig2.txt
DNSCHECK_DIGS=/tmp/digs.txt
[ -n "$TPPORT" ] || TPPORT=988
SYSTEMD_DIR=/lib/systemd
[ -d "$SYSTEMD_DIR" ] || SYSTEMD_DIR=/usr/lib/systemd
[ -d "$SYSTEMD_DIR" ] && SYSTEMD_SYSTEM_DIR="$SYSTEMD_DIR/system"
ECHON="echo -n"
exists()
{
which $1 >/dev/null 2>/dev/null
}
whichq()
{
which $1 2>/dev/null
}
MD5=md5sum
exists $MD5 || MD5=md5
contains()
{
# check if substring $2 contains in $1
[ "${1#*$2}" != "$1" ]
}
exitp()
{
local A
echo
echo press enter to continue
read A
exit $1
}
require_root()
{
echo \* checking privileges
[ $(id -u) -ne "0" ] && {
echo root is required
exists sudo && exec sudo "$0"
exists su && exec su -c "$0"
echo su or sudo not found
exitp 2
}
}
sedi()
{
# MacOS doesnt support -i without parameter. busybox doesnt support -i with parameter.
# its not possible to put "sed -i ''" to a variable and then use it
if [ "$SYSTEM" = "macos" ]; then
sed -i '' "$@"
else
sed -i "$@"
fi
}
read_yes_no()
{
# $1 - default (Y/N)
local A
read A
[ -z "$A" ] || ([ "$A" != "Y" ] && [ "$A" != "y" ] && [ "$A" != "N" ] && [ "$A" != "n" ]) && A=$1
[ "$A" = "Y" ] || [ "$A" = "y" ] || [ "$A" = "1" ]
}
ask_yes_no()
{
# $1 - default (Y/N or 0/1)
# $2 - text
local DEFAULT=$1
[ "$1" = "1" ] && DEFAULT=Y
[ "$1" = "0" ] && DEFAULT=N
[ -z "$DEFAULT" ] && DEFAULT=N
$ECHON "$2 (default : $DEFAULT) (Y/N) ? "
read_yes_no $DEFAULT
}
ask_yes_no_var()
{
# $1 - variable name for answer : 0/1
# $2 - text
local DEFAULT
eval DEFAULT="\$$1"
if ask_yes_no "$DEFAULT" "$2"; then
eval $1=1
else
eval $1=0
fi
}
on_off_function()
{
# $1 : function name on
# $2 : function name off
# $3 : 0 - off, 1 - on
local F="$1"
[ "$3" = "1" ] || F="$2"
shift
shift
shift
"$F" "$@"
}
get_dir_inode()
{
local dir="$1"
[ -L "$dir" ] && dir=$(readlink "$dir")
ls -id "$dir" | awk '{print $1}'
}
random()
{
# $1 - min, $2 - max
local r rs
if [ -c /dev/urandom ]; then
read rs </dev/urandom
else
rs="$RANDOM$RANDOM$(date)"
fi
# shells use signed int64
r=1$(echo $rs | $MD5 | sed 's/[^0-9]//g' | head -c 17)
echo $(( ($r % ($2-$1+1)) + $1 ))
}
parse_var_checked()
{
# $1 - file name
# $2 - var name
local sed="sed -nre s/^[[:space:]]*$2=[\\\"|\']?([^\\\"|\']*)[\\\"|\']?/\1/p"
local v="$($sed <"$1" | tail -n 1)"
eval $2=\"$v\"
}
parse_vars_checked()
{
# $1 - file name
# $2,$3,... - var names
local f="$1"
shift
while [ -n "$1" ]; do
parse_var_checked "$f" $1
shift
done
}
edit_file()
{
# $1 - file name
local ed="$EDITOR"
[ -n "$ed" ] || {
for e in mcedit nano vi; do
exists "$e" && {
ed="$e"
break
}
done
}
[ -n "$ed" ] && "$ed" "$1"
}
edit_vars()
{
# $1,$2,... - var names
local n=1 var v tmp="/tmp/zvars"
rm -f "$tmp"
while [ 1=1 ]; do
eval var="\$$n"
[ -n "$var" ] || break
eval v="\$$var"
echo $var=\"$v\" >>"$tmp"
n=$(($n+1))
done
edit_file "$tmp" && parse_vars_checked "$tmp" "$@"
rm -f "$tmp"
}
check_system()
{
echo \* checking system
SYSTEM=""
SYSTEMCTL=$(whichq systemctl)
local UNAME=$(uname)
if [ "$UNAME" = "Linux" ]; then
# do not use 'exe' because it requires root
local INIT=$(sed 's/\x0/\n/g' /proc/1/cmdline | head -n 1)
[ -L "$INIT" ] && INIT=$(readlink "$INIT")
INIT=$(basename "$INIT")
# some distros include systemctl without systemd
if [ -d "$SYSTEMD_DIR" ] && [ -x "$SYSTEMCTL" ] && [ "$INIT" = "systemd" ]; then
SYSTEM=systemd
elif exists rc-update && [ "$INIT" = "openrc-init" ]; then
SYSTEM=openrc
elif [ -f "/etc/openwrt_release" ] && exists opkg && exists uci && [ "$INIT" = "procd" ] ; then
SYSTEM=openwrt
else
echo system is not either systemd, openrc or openwrt based
echo easy installer can set up config settings but can\'t configure auto start
echo you have to do it manually. check readme.txt for manual setup info.
if ask_yes_no N "do you want to continue"; then
SYSTEM=linux
else
exitp 5
fi
fi
elif [ "$UNAME" = "Darwin" ]; then
SYSTEM=macos
# MacOS echo from /bin/sh does not support -n
ECHON=printf
else
echo easy installer only supports Linux and MacOS. check readme.txt for supported systems and manual setup info.
exitp 5
fi
echo system is based on $SYSTEM
}
check_readonly_system()
{
local RO
echo \* checking readonly system
case $SYSTEM in
systemd)
[ -w "$SYSTEMD_SYSTEM_DIR" ] || RO=1
;;
openrc)
[ -w "$(dirname "$INIT_SCRIPT")" ] || RO=1
;;
esac
[ -z "$RO" ] || {
echo '!!! READONLY SYSTEM DETECTED !!!'
echo '!!! WILL NOT BE ABLE TO CONFIGURE STARTUP !!!'
echo '!!! MANUAL STARTUP CONFIGURATION IS REQUIRED !!!'
ask_yes_no N "do you want to continue" || exitp 5
}
}
check_bins()
{
echo \* checking executables
local arch=$(get_bin_arch)
local make_target
[ "$FORCE_BUILD" = "1" ] && {
echo forced build mode
if [ "$arch" = "my" ]; then
echo already compiled
else
arch=""
fi
}
if [ -n "$arch" ] ; then
echo found architecture "\"$arch\""
elif [ -f "$EXEDIR/Makefile" ] && exists make; then
echo trying to compile
[ "$SYSTEM" = "macos" ] && make_target=mac
make -C "$EXEDIR" $make_target || {
echo could not compile
make -C "$EXEDIR" clean
exitp 8
}
echo compiled
else
echo build tools not found
exitp 8
fi
}
call_install_bin()
{
"$EXEDIR/install_bin.sh" $1
}
get_bin_arch()
{
call_install_bin getarch
}
install_binaries()
{
echo \* installing binaries
call_install_bin || {
echo compatible binaries not found
exitp 8
}
}
find_str_in_list()
{
[ -n "$1" ] && {
for v in $2; do
[ "$v" = "$1" ] && return 0
done
}
return 1
}
ask_list()
{
# $1 - mode var
# $2 - space separated value list
# $3 - (optional) default value
local M_DEFAULT
eval M_DEFAULT="\$$1"
local M_ALL=$M_DEFAULT
local M=""
local m
[ -n "$3" ] && { find_str_in_list "$M_DEFAULT" "$2" || M_DEFAULT="$3" ;}
n=1
for m in $2; do
echo $n : $m
n=$(($n+1))
done
$ECHON "your choice (default : $M_DEFAULT) : "
read m
[ -n "$m" ] && M=$(echo $2 | cut -d ' ' -f$m 2>/dev/null)
[ -z "$M" ] && M="$M_DEFAULT"
echo selected : $M
eval $1="\"$M\""
[ "$M" != "$M_OLD" ]
}
write_config_var()
{
# $1 - mode var
local M
eval M="\$$1"
if grep -q "^$1=\|^#$1=" "$ZAPRET_CONFIG"; then
# replace / => \/
#M=${M//\//\\\/}
M=$(echo $M | sed 's/\//\\\//g')
if [ -n "$M" ]; then
if contains "$M" " "; then
sedi -Ee "s/^#?$1=.*$/$1=\"$M\"/" "$ZAPRET_CONFIG"
else
sedi -Ee "s/^#?$1=.*$/$1=$M/" "$ZAPRET_CONFIG"
fi
else
# write with comment at the beginning
sedi -Ee "s/^#?$1=.*$/#$1=/" "$ZAPRET_CONFIG"
fi
else
# var does not exist in config. add it
if [ -n "$M" ]; then
echo "$1=$M" >>"$ZAPRET_CONFIG"
else
echo "#$1=$M" >>"$ZAPRET_CONFIG"
fi
fi
}
select_mode_mode()
{
local edited v vars MODES="tpws tpws-socks nfqws filter custom"
[ "$SYSTEM" = "macos" ] && MODES="tpws tpws-socks filter custom"
echo
echo select MODE :
ask_list MODE "$MODES" tpws && write_config_var MODE
case $MODE in
tpws)
vars="TPWS_OPT"
;;
nfqws)
vars="NFQWS_OPT_DESYNC NFQWS_OPT_DESYNC_HTTP NFQWS_OPT_DESYNC_HTTPS"
;;
esac
[ -n "$vars" ] && {
echo
while [ 1=1 ]; do
for var in $vars; do
eval v="\$$var"
echo $var=\"$v\"
done
ask_yes_no N "do you want to edit the options" || {
[ -n "$edited" ] && {
for var in $vars; do
write_config_var $var
done
}
break
}
edit_vars $vars
edited=1
echo ..edited..
done
}
}
select_mode_http()
{
[ "$MODE" != "filter" ] && [ "$MODE" != "tpws-socks" ] && {
echo
ask_yes_no_var MODE_HTTP "enable http support"
write_config_var MODE_HTTP
}
}
select_mode_keepalive()
{
[ "$MODE" = "nfqws" ] && [ "$MODE_HTTP" = "1" ] && {
echo
echo enable keep alive support only if DPI checks every outgoing packet for http signature
echo dont enable otherwise because it consumes more cpu resources
ask_yes_no_var MODE_HTTP_KEEPALIVE "enable http keep alive support"
write_config_var MODE_HTTP_KEEPALIVE
}
}
select_mode_https()
{
[ "$MODE" != "filter" ] && [ "$MODE" != "tpws-socks" ] && {
echo
ask_yes_no_var MODE_HTTPS "enable https support"
write_config_var MODE_HTTPS
}
}
select_mode_filter()
{
local filter="none ipset hostlist"
[ "$MODE" = "tpws-socks" ] && filter="none hostlist"
echo
echo select filtering :
ask_list MODE_FILTER "$filter" none && write_config_var MODE_FILTER
}
select_mode()
{
select_mode_mode
select_mode_iface
select_mode_http
select_mode_keepalive
select_mode_https
select_mode_filter
}
select_getlist()
{
if [ "$MODE_FILTER" = "ipset" -o "$MODE_FILTER" = "hostlist" ]; then
local D=N
[ -n "$GETLIST" ] && D=Y
echo
if ask_yes_no $D "do you want to auto download ip/host list"; then
if [ "$MODE_FILTER" = "hostlist" ] ; then
local GL_OLD=$GETLIST
GETLIST="get_reestr_hostlist.sh"
[ "$GL_OLD" != "$GET_LIST" ] && write_config_var GETLIST
else
GETLISTS="get_user.sh get_antifilter_ip.sh get_antifilter_ipsmart.sh get_antifilter_ipsum.sh get_reestr_ip.sh get_reestr_combined.sh get_reestr_resolve.sh"
GETLIST_DEF="get_antifilter_ipsmart.sh"
ask_list GETLIST "$GETLISTS" "$GETLIST_DEF" && write_config_var GETLIST
fi
return
fi
fi
GETLIST=""
write_config_var GETLIST
}
select_ipv6()
{
local T=N
[ "$DISABLE_IPV6" != '1' ] && T=Y
local old6=$DISABLE_IPV6
echo
if ask_yes_no $T "enable ipv6 support"; then
DISABLE_IPV6=0
else
DISABLE_IPV6=1
fi
[ "$old6" != "$DISABLE_IPV6" ] && write_config_var DISABLE_IPV6
}
ask_config()
{
select_mode
select_getlist
}
ask_config_offload()
{
is_flow_offload_avail && {
echo
echo flow offloading can greatly increase speed on slow devices and high speed links \(usually 150+ mbits\)
echo unfortuantely its not compatible with most nfqws options. nfqws traffic must be exempted from flow offloading.
echo donttouch = disable system flow offloading setting if nfqws mode was selected, dont touch it otherwise and dont configure selective flow offloading
echo none = always disable system flow offloading setting and dont configure selective flow offloading
echo software = always disable system flow offloading setting and configure selective software flow offloading
echo hardware = always disable system flow offloading setting and configure selective hardware flow offloading
echo select flow offloading :
ask_list FLOWOFFLOAD "donttouch none software hardware" donttouch && write_config_var FLOWOFFLOAD
}
}
get_free_space_mb()
{
df -m $PWD | awk '/[0-9]%/{print $(NF-2)}'
}
get_ram_kb()
{
grep MemTotal /proc/meminfo | awk '{print $2}'
}
get_ram_mb()
{
local R=$(get_ram_kb)
echo $(($R/1024))
}
ask_config_tmpdir()
{
# ask tmpdir change for low ram systems with enough free disk space
[ -n "$GETLIST" ] && [ $(get_free_space_mb "$EXEDIR/tmp") -ge 128 ] && [ $(get_ram_mb) -le 400 ] && {
echo
echo /tmp in openwrt is tmpfs. on low RAM systems there may be not enough RAM to store downloaded files
echo default tmpfs has size of 50% RAM
echo "RAM : $(get_ram_mb) Mb"
echo "DISK : $(get_free_space_mb) Mb"
echo select temp file location
[ -z "$TMPDIR" ] && TMPDIR=/tmp
ask_list TMPDIR "/tmp $EXEDIR/tmp" && {
[ "$TMPDIR" = "/tmp" ] && TMPDIR=
write_config_var TMPDIR
}
}
}
ask_iface()
{
# $1 - var to ask
# $2 - additional name for empty string synonim
local ifs i0 def new
eval def="\$$1"
[ -n "$2" ] && i0="$2 "
case $SYSTEM in
macos)
ifs="$(ifconfig -l)"
;;
*)
ifs="$(ls /sys/class/net)"
;;
esac
[ -z "$def" ] && eval $1="$2"
ask_list $1 "$i0$ifs" && {
eval new="\$$1"
[ "$new" = "$2" ] && eval $1=""
write_config_var $1
}
}
ask_iface_lan()
{
echo LAN interface :
ask_iface IFACE_LAN "NONE"
}
ask_iface_wan()
{
echo WAN interface :
ask_iface IFACE_WAN "ANY"
}
select_mode_iface()
{
# openwrt has its own interface management scheme
# filter just creates ip tables, no daemons involved
# nfqws sits in POSTROUTING chain and unable to filter by incoming interface
# tpws redirection works in PREROUTING chain
# in tpws-socks mode IFACE_LAN specifies additional bind interface for the socks listener
# it's not possible to instruct tpws to route outgoing connection to an interface (OS routing table decides)
# custom mode can also benefit from interface names (depends on custom script code)
if [ "$SYSTEM" = "openwrt" ] || [ "$MODE" = "filter" ]; then return; fi
echo
case "$MODE" in
tpws-socks)
echo "select LAN interface to allow socks access from your LAN. select NONE for localhost only."
echo "expect socks on tcp port $TPPORT"
ask_iface_lan
;;
tpws)
echo "select LAN interface to operate in router mode. select NONE for local outgoing traffic only."
if [ "$SYSTEM" = "macos" ]; then
echo "WARNING ! OS feature \"internet sharing\" is not supported."
echo "Only manually configured PF router is supported."
else
echo "WARNING ! This installer will not configure routing, NAT, ... for you. Its your responsibility."
fi
ask_iface_lan
;;
custom)
echo "select LAN interface for your custom script (how it works depends on your code)"
ask_iface_lan
;;
esac
case "$MODE" in
tpws)
echo "select WAN interface for $MODE operations. select ANY to operate on any interface."
[ -n "$IFACE_LAN" ] && echo "WAN filtering works only for local outgoing traffic !"
ask_iface_wan
;;
nfqws)
echo "select WAN interface for $MODE operations. select ANY to operate on any interface."
ask_iface_wan
;;
custom)
echo "select WAN interface for your custom script (how it works depends on your code)"
ask_iface_wan
;;
esac
}
copy_all()
{
cp -R "$1" "$2"
[ -d "$2/tmp" ] || mkdir "$2/tmp"
}
copy_openwrt()
{
local ARCH=$(get_bin_arch)
local BINDIR="$1/binaries/$ARCH"
[ -d "$2" ] || mkdir -p "$2"
mkdir "$2/tpws" "$2/nfq" "$2/ip2net" "$2/mdig" "$2/binaries" "$2/binaries/$ARCH" "$2/init.d" "$2/tmp"
cp -R "$1/ipset" "$2"
cp -R "$1/init.d/openwrt" "$2/init.d"
cp "$1/config" "$1/install_easy.sh" "$1/uninstall_easy.sh" "$1/install_bin.sh" "$2"
cp "$BINDIR/tpws" "$BINDIR/nfqws" "$BINDIR/ip2net" "$BINDIR/mdig" "$2/binaries/$ARCH"
}
_backup_settings()
{
local i=0
for f in "$@"; do
[ -f "$ZAPRET_TARGET/$f" ] && cp -f "$ZAPRET_TARGET/$f" "/tmp/zapret-bkp-$i"
i=$(($i+1))
done
}
_restore_settings()
{
local i=0
for f in "$@"; do
[ -f "/tmp/zapret-bkp-$i" ] && mv -f "/tmp/zapret-bkp-$i" "$ZAPRET_TARGET/$f" || rm -f "/tmp/zapret-bkp-$i"
i=$(($i+1))
done
}
backup_restore_settings()
{
# $1 - 1 - backup, 0 - restore
local mode=$1
on_off_function _backup_settings _restore_settings $mode "config" "init.d/sysv/custom" "init.d/openwrt/custom" "init.d/macos/custom" "ipset/zapret-hosts-user.txt" "ipset/zapret-hosts-user-exclude.txt" "ipset/zapret-hosts-user-ipban.txt"
}
check_location()
{
# $1 - copy function
echo \* checking location
# use inodes in case something is linked
[ -d "$ZAPRET_TARGET" ] && [ $(get_dir_inode "$EXEDIR") = $(get_dir_inode "$ZAPRET_TARGET") ] || {
echo
echo easy install is supported only from default location : $ZAPRET_TARGET
echo currently its run from $EXEDIR
if ask_yes_no N "do you want the installer to copy it for you"; then
local keep=N
if [ -d "$ZAPRET_TARGET" ]; then
echo
echo installer found existing $ZAPRET_TARGET
echo directory needs to be replaced. config and custom scripts can be kept or replaced with clean version
if ask_yes_no N "do you want to delete all files there and copy this version"; then
echo
ask_yes_no Y "keep config, custom scripts and user lists" && keep=Y
[ "$keep" = "Y" ] && backup_restore_settings 1
rm -r "$ZAPRET_TARGET"
else
echo refused to overwrite $ZAPRET_TARGET. exiting
exitp 3
fi
fi
local B=$(dirname "$ZAPRET_TARGET")
[ -d "$B" ] || mkdir -p "$B"
$1 "$EXEDIR" "$ZAPRET_TARGET"
[ "$keep" = "Y" ] && backup_restore_settings 0
echo relaunching itself from $ZAPRET_TARGET
exec $ZAPRET_TARGET/$(basename $0)
else
echo copying aborted. exiting
exitp 3
fi
}
echo running from $EXEDIR
}
check_prerequisites_linux()
{
echo \* checking prerequisites
if exists iptables && exists ip6tables ; then
echo iptables present
else
# looks like it's a limited system. will not guess how to install base tools
echo '! iptables/ip6tables NOT present. you must install them manually.'
exitp 5
fi
if exists ipset && exists curl ; then
echo ipset and curl are present
else
echo \* installing prerequisites
APTGET=$(whichq apt-get)
YUM=$(whichq yum)
PACMAN=$(whichq pacman)
ZYPPER=$(whichq zypper)
EOPKG=$(whichq eopkg)
APK=$(whichq apk)
if [ -x "$APTGET" ] ; then
"$APTGET" update
"$APTGET" install -y --no-install-recommends ipset curl dnsutils || {
echo could not install prerequisites
exitp 6
}
elif [ -x "$YUM" ] ; then
"$YUM" -y install curl ipset || {
echo could not install prerequisites
exitp 6
}
elif [ -x "$PACMAN" ] ; then
"$PACMAN" -Syy
"$PACMAN" --noconfirm -S ipset curl || {
echo could not install prerequisites
exitp 6
}
elif [ -x "$ZYPPER" ] ; then
"$ZYPPER" --non-interactive install ipset curl || {
echo could not install prerequisites
exitp 6
}
elif [ -x "$EOPKG" ] ; then
"$EOPKG" -y install ipset curl || {
echo could not install prerequisites
exitp 6
}
elif [ -x "$APK" ] ; then
"$APK" add ipset curl || {
echo could not install prerequisites
exitp 6
}
else
echo supported package manager not found
echo you must manually install : ipset curl
exitp 5
fi
fi
}
service_install_systemd()
{
echo \* installing zapret service
if [ -w "$SYSTEMD_SYSTEM_DIR" ] ; then
rm -f "$INIT_SCRIPT"
ln -fs "$EXEDIR/init.d/systemd/zapret.service" "$SYSTEMD_SYSTEM_DIR"
"$SYSTEMCTL" daemon-reload
"$SYSTEMCTL" enable zapret || {
echo could not enable systemd service
exitp 20
}
else
echo '!!! READONLY SYSTEM DETECTED !!! CANNOT INSTALL SYSTEMD UNITS !!!'
fi
}
service_stop_systemd()
{
echo \* stopping zapret service
"$SYSTEMCTL" daemon-reload
"$SYSTEMCTL" disable zapret
"$SYSTEMCTL" stop zapret
}
service_start_systemd()
{
echo \* starting zapret service
"$SYSTEMCTL" start zapret || {
echo could not start zapret service
exitp 30
}
}
timer_install_systemd()
{
echo \* installing zapret-list-update timer
if [ -w "$SYSTEMD_SYSTEM_DIR" ] ; then
"$SYSTEMCTL" disable zapret-list-update.timer
"$SYSTEMCTL" stop zapret-list-update.timer
ln -fs "$EXEDIR/init.d/systemd/zapret-list-update.service" "$SYSTEMD_SYSTEM_DIR"
ln -fs "$EXEDIR/init.d/systemd/zapret-list-update.timer" "$SYSTEMD_SYSTEM_DIR"
"$SYSTEMCTL" daemon-reload
"$SYSTEMCTL" enable zapret-list-update.timer || {
echo could not enable zapret-list-update.timer
exitp 20
}
"$SYSTEMCTL" start zapret-list-update.timer || {
echo could not start zapret-list-update.timer
exitp 30
}
else
echo '!!! READONLY SYSTEM DETECTED !!! CANNOT INSTALL SYSTEMD UNITS !!!'
fi
}
download_list()
{
[ -x "$GET_LIST" ] && {
echo \* downloading blocked ip/host list
# can be txt or txt.gz
"$IPSET_DIR/clear_lists.sh"
"$GET_LIST" || {
echo could not download ip list
exitp 25
}
}
}
end_with_newline()
{
local c=$(tail -c 1)
[ "$c" = "" ]
}
crontab_del_quiet()
{
exists crontab || return
CRONTMP=/tmp/cron.tmp
crontab -l >$CRONTMP 2>/dev/null
if grep -q "$GET_LIST_PREFIX" $CRONTMP; then
grep -v "$GET_LIST_PREFIX" $CRONTMP >$CRONTMP.2
crontab $CRONTMP.2
rm -f $CRONTMP.2
fi
rm -f $CRONTMP
}
crontab_add()
{
# $1 - hour min
# $2 - hour max
[ -x "$GET_LIST" ] && {
echo \* adding crontab entry
if exists crontab; then
CRONTMP=/tmp/cron.tmp
crontab -l >$CRONTMP 2>/dev/null
if grep -q "$GET_LIST_PREFIX" $CRONTMP; then
echo some entries already exist in crontab. check if this is corrent :
grep "$GET_LIST_PREFIX" $CRONTMP
else
end_with_newline <"$CRONTMP" || echo >>"$CRONTMP"
echo "$(random 0 59) $(random $1 $2) */2 * * $GET_LIST" >>$CRONTMP
crontab $CRONTMP
fi
rm -f $CRONTMP
else
echo '!!! CRON IS ABSENT !!! LISTS AUTO UPDATE WILL NOT WORK !!!'
fi
}
}
cron_ensure_running()
{
# if no crontabs present in /etc/cron openwrt init script does not launch crond. this is default
[ "$SYSTEM" = "openwrt" ] && {
/etc/init.d/cron enable
/etc/init.d/cron start
}
}
pingtest()
{
ping -c 1 -W 1 $1 >/dev/null
}
dnstest()
{
# $1 - dns server. empty for system resolver
nslookup 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
}
check_dns_spoof()
{
# $1 - domain
# $2 - public DNS
echo $1 | "$EXEDIR/mdig/mdig" --family=4 >"$DNSCHECK_DIG1"
nslookup $1 $2 | sed -n '/Name:/,$p' | grep ^Address | grep -oE '([0-9]{1,3}\.){3}[0-9]{1,3}' >"$DNSCHECK_DIG2"
# check whether system resolver returns anything other than public DNS
grep -qvFf "$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 $dom; done | "$EXEDIR/mdig/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
}