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powerful adblock script to block ad/abuse domains 

Signed-off-by: dirk <dirk@brenken.org>
This commit is contained in:
dirk 2015-10-28 00:02:23 +01:00
parent 49d2473bdc
commit 10bd039c37
15 changed files with 956 additions and 0 deletions
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#
# Copyright (C) 2015 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v3.
#
include $(TOPDIR)/rules.mk
PKG_NAME:=adblock
PKG_VERSION:=0.11.0
PKG_RELEASE:=1
PKG_LICENSE:=GPL-3.0+
PKG_MAINTAINER:=Dirk Brenken <dirk@brenken.org>
include $(INCLUDE_DIR)/package.mk
define Package/$(PKG_NAME)
SECTION:=net
CATEGORY:=Network
TITLE:=powerful adblock script to block ad/abuse domains
DEPENDS:=+curl +wget
PKGARCH:=all
endef
define Package/$(PKG_NAME)/description
powerful adblock script to block ad/abuse domains
When the dns server on your router receives dns requests, we will sort out queries that ask for the [A] resource records of ad servers
and return the local ip address of your router and the internal web server delivers a transparent pixel instead.
The script supports the following domain blacklist sites:
http://pgl.yoyo.org/adservers
http://malwaredomains.com
https://zeustracker.abuse.ch
https://feodotracker.abuse.ch
https://palevotracker.abuse.ch
http://dshield.org
http://www.shallalist.de
http://www.spam404.com
http://winhelp2002.mvps.org
endef
define Package/$(PKG_NAME)/conffiles
/etc/adblock/adblock.conf
/etc/adblock/adblock.whitelist
/etc/adblock/adblock.blacklist
endef
define Build/Prepare
endef
define Build/Configure
endef
define Build/Compile
endef
define Package/$(PKG_NAME)/install
$(INSTALL_DIR) $(1)/usr/bin
$(INSTALL_BIN) ./files/usr/bin/adblock-update.sh $(1)/usr/bin/
$(INSTALL_DATA) ./files/usr/bin/adblock-helper.sh $(1)/usr/bin/
$(INSTALL_DIR) $(1)/etc/adblock
$(INSTALL_CONF) ./files/etc/adblock/adblock.* $(1)/etc/adblock/
$(INSTALL_CONF) ./files/etc/adblock/README.md $(1)/etc/adblock/
$(INSTALL_DIR) $(1)/etc/adblock/samples
$(INSTALL_CONF) ./files/etc/adblock/samples/*.sample $(1)/etc/adblock/samples/
$(INSTALL_DIR) $(1)/www/adblock
$(INSTALL_DATA) ./files/www/adblock/* $(1)/www/adblock/
endef
$(eval $(call BuildPackage,$(PKG_NAME)))

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# adblock script for openwrt
## Description
A lot of people already use adblocker plugins within their desktop browsers,
but what if you are using your (smart) phone, tablet, watch or any other wlan gadget...
...getting rid of annoying ads, trackers and other abuse sites (like facebook ;-) is simple: block them with your router.
When the dns server on your router receives dns requests, we’ll sort out queries that ask for the [A] resource records of ad servers
and return the local ip address of your router and the internal web server delivers a transparent pixel instead.
## Main Features
* support of the following domain blacklist sites (free for private usage, for commercial use please check their individual licenses):
* [pgl.yoyo.org](http://pgl.yoyo.org/adservers)
* [malwaredomains.com](http://malwaredomains.com)
* [zeustracker.abuse.ch](https://zeustracker.abuse.ch)
* [feodotracker.abuse.ch](https://feodotracker.abuse.ch)
* [palevotracker.abuse.ch](https://palevotracker.abuse.ch)
* [dshield.org](http://dshield.org)
* [shallalist.de](http://www.shallalist.de) (tested with the categories "adv" "costtraps" "downloads" "spyware" "tracker" "warez")
* [spam404.com](http://www.spam404.com)
* [winhelp2002.mvps.org](http://winhelp2002.mvps.org)
* blocklist parsing by fast & flexible regex rulesets
* additional white- and blacklist support for manual overrides
* separate adblock loopback network interface (auto-install)
* separate uhttpd instance as pixel server (auto-install)
* optional: quality checks and a powerful backup/restore handling to ensure a reliable dnsmasq service
* optional: adblock updates only on pre-defined interfaces
* optional: domain query logging as a background service to easily identify free and already blocked domains
* optional: ntp time sync
* optional: status & error logging (req. ntp time sync)
## Prerequisites
* [openwrt](https://openwrt.org) (tested only with trunk > r47025), CC should also work (please adjust *min_release* accordingly)
* additional software packages:
* curl
* wget (due to an openwrt bug still needed for certain https requests - see ticket #19621)
* busybox find with *-mtime* support (needed only for query logging/housekeeping, will be disabled if not found)
* optional: mounted usb stick or any other storage device to overcome limited memory resources on embedded router devices
* the above dependencies will be checked during package installation & script runtime, please check *logread -e "adblock"* for errors
## Usage
* select & install adblock package (*opkg install adblock*)
* configure /etc/adblock/adblock.conf to your needs
* start /usr/bin/adblock-update.sh and check *logread -e "adblock"* for errors
## Distributed samples
* to enable/disable additional domain query logging set the dnsmasq option *logqueries* accordingly, see */etc/adblock/samples/dhcp.config.sample*.
* for script autostart via rc.local and /tmp resizing on the fly see */etc/adblock/samples/rc.local.sample*.
* for scheduled call of *adblock-update.sh* see */etc/adblock/samples/root.crontab.sample*.
* to redirect/force all dns queries to your router see */etc/adblock/samples/firwall.user.sample*.
* for further dnsmasq tweaks see */etc/adblock/samples/dnsmasq.conf.sample*.
Have fun!
Dirk

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bild.de

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###################################################
# adblock configuration used by adblock-update.sh #
# written by Dirk Brenken (dirk@brenken.org) #
###################################################
# adblock ip address and device information
# adb_ip => ip address of the local adblock loopback interface/uhttpd instance
# adb_dev => name of the physical adblock network device
# adb_if => name of the adblock network interface and uhttpd instance
#
adb_ip="192.168.2.1"
adb_dev="eth0"
adb_if="adblock"
# backup file and default restore message
# backup_dir => full path to directory for logging and backups, an empty entry disables this feature
# backup_file => full path to backup file
# restore_msg => default restore message
#
backup_dir=""
backup_file="${backup_dir}/adlist.backup"
restore_msg="unknown error"
# wan/update interface(s)
# wan_dev => space separated list of devices that are allowed for adblock updates (check /sys/class/net/<dev>),
# an empty entry disables this feature
#
wan_dev=""
# local adblock black & white list for manual overrides
# adb_blacklist => full path to domain blacklist file
# adb_whitelist => full path to domain whitelist file
#
adb_blacklist="/etc/adblock/adblock.blacklist"
adb_whitelist="/etc/adblock/adblock.whitelist"
# error logfile
# log_file => full path to additional logfile for error logging,
# "/dev/stdout" redirect errors to console, an empty entry disables this feature
# this feature requires ntp time sync too (see below)
#
log_file="${backup_dir}/error.log"
# domain query logfile
# query_file => full path to additional domain query logfile,
# an empty entry or an empty backup_dir entry disables this feature
# query_history => delete query logfiles older than n days (req. busybox find with mtime support)
#
query_file="${backup_dir}/query.log"
query_history=1
query_name="$(printf "${query_file}" | sed 's/.*\///g')"
query_ip="$(printf "${adb_ip}" | sed 's/\./\\./g')"
query_pid="/var/run/query.pid"
# ntp time server pool
# ntp_srv => space separated list of ntp serverpools, an empty entry disables this feature
#
ntp_srv="ntp0.fau.de ntp1.fau.de ntp2.fau.de ntp3.fau.de"
# domain for nslookup probe
# check_domain => check the newly generated domain blocklist with this domain
#
check_domain="heise.de"
# set startup counter and download timeout defaults
# max_cnt => wait n seconds/loops for wan & ntp check in sum
# max_time => wait n seconds for every source download
#
cnt=0
max_cnt=30
max_time=60
# minimum values for environment checks
# min_release => minimum required openwrt release number
# min_space => minimum required space for backups & logfiles (in kbyte)
#
min_release=47025
min_space=100000
# shallalist url, categories and local naming
# shalla_cat => space separated list of categories to use from shallalist archive
#
shalla_cat="adv costtraps downloads spyware tracker warez"
shalla_url="http://www.shallalist.de/Downloads/shallalist.tar.gz"
shalla_archive="${tmp_dir}/shallalist.tar.gz"
shalla_file="${tmp_dir}/shallalist.txt"
# remote and local domain block list sources
# adb_source => comment out sources you don't want to use
#
unset adb_source
adb_source="${adb_source} http://pgl.yoyo.org/adservers/serverlist.php?hostformat=one-line&showintro=0&mimetype=plaintext&ruleset=yoyo"
#adb_source="${adb_source} http://mirror1.malwaredomains.com/files/justdomains&ruleset=default"
#adb_source="${adb_source} https://zeustracker.abuse.ch/blocklist.php?download=domainblocklist&ruleset=default"
#adb_source="${adb_source} https://feodotracker.abuse.ch/blocklist/?download=domainblocklist&ruleset=default"
#adb_source="${adb_source} https://palevotracker.abuse.ch/blocklists.php?download=domainblocklist&ruleset=default"
#adb_source="${adb_source} http://www.dshield.org/feeds/suspiciousdomains_Low.txt&ruleset=default"
#adb_source="${adb_source} file:///${shalla_file}&ruleset=shalla"
#adb_source="${adb_source} http://spam404bl.com/spam404scamlist.txt&ruleset=spam404"
#adb_source="${adb_source} http://winhelp2002.mvps.org/hosts.txt&ruleset=winhelp"
adb_source="${adb_source} file://${adb_blacklist}&ruleset=default"
# adblock source ruleset definitions
# note: please keep the default settings below
#
rset_start="sed -r 's/[[:space:]]|[\[!#/:;_].*|[0-9\.]*localhost//g; s/[\^#/:;_\.\t ]*$//g'"
rset_end="sed '/^[#/:;_\s]*$/d'"
rset_default="${rset_start} | ${rset_end}"
rset_yoyo="${rset_start} | sed 's/,/\n/g' | ${rset_end}"
rset_shalla="${rset_start} | sed 's/\([0-9]\{1,3\}\.\)\{3\}[0-9]\{1,3\}$//g' | ${rset_end}"
rset_spam404="${rset_start} | sed 's/^\|\|//g' | ${rset_end}"
rset_winhelp="${rset_start} | sed 's/\([0-9]\{1,3\}\.\)\{3\}[0-1]\{1,1\}//g' | ${rset_end}"
# dnsmasq destination file and format
# note: please keep the default settings below
#
dns_file="/tmp/dnsmasq.d/adlist.conf"
dns_format="sed 's/^/address=\//;s/$/\/'${adb_ip}'/'"

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downloads.openwrt.org
ftp.de.debian.org
download.eclipse.org
dl.sourceforge.net

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# tweaks for dnsmasq
# configuration found in /etc/config/dhcp
#
config dnsmasq
option cachesize '1000'
option filterwin2k '0'
option logqueries '1'

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# tell DHCP clients to not ask for proxy information
# some clients - like Win7 - will constantly ask if not told "No!"
# configuration found in /etc/dnsmasq
#
dhcp-option=252,"\n"

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# redirect/force all dns queries to port 53 of your router
# configuration found in /etc/firewall.user
#
iptables -t nat -I PREROUTING -p tcp --dport 53 -j REDIRECT --to-ports 53
iptables -t nat -I PREROUTING -p udp --dport 53 -j REDIRECT --to-ports 53

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# sample startup script
# configuration found in /etc/rc.local
#
# start logging
#
/usr/bin/logger -t rc.local "start rc.local processing"
# set home directory
#
export HOME=/root
# resize /tmp partition to 256 MB
#
/usr/bin/logger -t rc.local "resize /tmp partition to 256 MB"
mount tmpfs /tmp -t tmpfs -o remount,nosuid,nodev,noatime,size=256M
# start adblock script
#
/usr/bin/logger -t rc.local "start adblock script"
/usr/bin/adblock-update.sh >/dev/null 2>&1
# write log and exit
#
/usr/bin/logger -t rc.local "finish rc.local processing"
exit 0

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# sample crontab script
# configuration found in /etc/crontabs/root
#
# start adblock script twice a day
#
0 06 * * * /usr/bin/adblock-update.sh &
0 22 * * * /usr/bin/adblock-update.sh &

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##############################################
# function library used by adblock-update.sh #
# written by Dirk Brenken (dirk@brenken.org) #
##############################################
#############################################
# f_envcheck: check environment prerequisites
#
f_envcheck()
{
# source in json helpers library
#
if [ -r "/usr/share/libubox/jshn.sh" ]
then
. "/usr/share/libubox/jshn.sh"
else
/usr/bin/logger -t "adblock[${pid}]" "json helpers library not found"
f_deltemp
exit 10
fi
# check adblock network device configuration
#
if [ ! -d "/sys/class/net/${adb_dev}" ]
then
/usr/bin/logger -t "adblock[${pid}]" "invalid adblock network device input (${adb_dev})"
f_deltemp
exit 15
fi
# check adblock network interface configuration
#
check_if="$(printf "${adb_if}" | sed -n '/[^_0-9A-Za-z]/p')"
banned_if="$(printf "${adb_if}" | sed -n '/.*lan.*\|.*wan.*\|.*switch.*\|main\|globals\|loopback\|px5g/p')"
if [ -n "${check_if}" ] || [ -n "${banned_if}" ]
then
/usr/bin/logger -t "adblock[${pid}]" "invalid adblock network interface input (${adb_if})"
f_deltemp
exit 20
fi
# check adblock ip address configuration
#
check_ip="$(printf "${adb_ip}" | sed -n '/\([0-9]\{1,3\}\.\)\{3\}[0-9]\{1,3\}/p')"
if [ -z "${check_ip}" ]
then
/usr/bin/logger -t "adblock[${pid}]" "invalid adblock ip address input (${adb_ip})"
f_deltemp
exit 25
fi
# check adblock blacklist/whitelist configuration
#
if [ ! -r "${adb_blacklist}" ] || [ ! -r "${adb_whitelist}" ]
then
/usr/bin/logger -t "adblock[${pid}]" "adblock blacklist or whitelist not found"
f_deltemp
exit 30
fi
# check wan update configuration
#
if [ -n "${wan_dev}" ]
then
wan_ok="true"
else
wan_ok="false"
/usr/bin/logger -t "adblock[${pid}]" "wan update check will be disabled"
fi
# check ntp sync configuration
#
if [ -n "${ntp_srv}" ]
then
ntp_ok="true"
else
ntp_ok="false"
/usr/bin/logger -t "adblock[${pid}]" "ntp time sync will be disabled"
fi
# check backup configuration
#
if [ -n "${backup_dir}" ] && [ -d "${backup_dir}" ]
then
backup_ok="true"
mounts="${backup_dir} ${tmp_dir}"
else
backup_ok="false"
mounts="${tmp_dir}"
/usr/bin/logger -t "adblock[${pid}]" "backup/restore will be disabled"
fi
# check error log configuration
#
if [ "${log_file}" = "/dev/stdout" ]
then
log_ok="true"
log_file="/proc/self/fd/1"
elif [ -n "${log_file}" ] && [ "${backup_ok}" = "true" ] && [ "${ntp_ok}" = "true" ]
then
log_ok="true"
else
log_ok="false"
log_file="/dev/null"
/usr/bin/logger -t "adblock[${pid}]" "error logging will be disabled"
fi
# check dns query log configuration
#
if [ -n "${query_file}" ] && [ "${backup_ok}" = "true" ]
then
# check find capabilities
#
base="$(find --help 2>&1 | grep "mtime")"
if [[ -z "${base}" ]]
then
query_ok="false"
/usr/bin/logger -t "adblock[${pid}]" "no 'find/mtime' support, dns query logging will be disabled"
else
query_ok="true"
fi
else
query_ok="false"
/usr/bin/logger -t "adblock[${pid}]" "dns query logging will be disabled"
fi
# check shallalist configuration
#
check_shalla="$(printf "${adb_source}" | sed -n '/.*shallalist.txt.*/p')"
if [ -n "${check_shalla}" ]
then
shalla_ok="true"
else
shalla_ok="false"
/usr/bin/logger -t "adblock[${pid}]" "shallalist processing will be disabled"
fi
# check mount points & space requirements
#
for mp in ${mounts}
do
df "${mp}" 2>/dev/null |\
tail -n1 |\
while read filesystem overall used available scrap
do
av_space="${available}"
if [ $((av_space)) -eq 0 ]
then
/usr/bin/logger -t "adblock[${pid}]" "no space left on device, not mounted (${mp})"
exit 35
elif [ $((av_space)) -lt $((min_space)) ]
then
/usr/bin/logger -t "adblock[${pid}]" "not enough space on device (${mp})"
exit 40
fi
done
# subshell return code handling
#
rc=$?
if [ $((rc)) -ne 0 ]
then
f_deltemp
exit ${rc}
fi
done
# get list with all installed packages
#
pkg_list="$(opkg list-installed 2>/dev/null)"
# check openwrt release
#
base="$(printf "${pkg_list}" | grep "^base-files" | sed 's/\(.*r\)//g')"
if [ $((base)) -lt $((min_release)) ]
then
/usr/bin/logger -t "adblock[${pid}]" "openwrt (r${wrt_release}) seems to be too old"
f_deltemp
exit 45
fi
# check curl package dependency
#
base="$(printf "${pkg_list}" | grep "^curl")"
if [ -z "${base}" ]
then
/usr/bin/logger -t "adblock[${pid}]" "curl package not found"
f_deltemp
exit 50
fi
# check wget package dependency
#
base="$(printf "${pkg_list}" | grep "^wget")"
if [ -z "${base}" ]
then
/usr/bin/logger -t "adblock[${pid}]" "wget package not found"
f_deltemp
exit 55
fi
# check dynamic/volatile adblock network interface configuration
#
rc="$(ifstatus "${adb_if}" >/dev/null 2>&1; printf $?)"
if [ $((rc)) -ne 0 ]
then
json_init
json_add_string name "${adb_if}"
json_add_string ifname "${adb_dev}"
json_add_string proto "static"
json_add_array ipaddr
json_add_string "" "${adb_ip}"
json_close_array
json_close_object
ubus call network add_dynamic "$(json_dump)"
/usr/bin/logger -t "adblock[${pid}]" "created new dynamic/volatile network interface (${adb_if}, ${adb_ip})"
fi
# check adblock uhttpd instance configuration
#
if [ -z "$(uci -q get uhttpd.${adb_if} 2>/dev/null)" ]
then
uci -q set uhttpd.${adb_if}="uhttpd"
uci -q set uhttpd.${adb_if}.listen_http="${adb_ip}:80"
uci -q set uhttpd.${adb_if}.home="/www/adblock"
uci -q set uhttpd.${adb_if}.error_page="/adblock.html"
uci -q commit uhttpd
/etc/init.d/uhttpd reload
/usr/bin/logger -t "adblock[${pid}]" "created new uhttpd instance (${adb_if}, ${adb_ip}) in /etc/config/uhttpd"
fi
}
###################################################
# f_deltemp: delete temporary files and directories
f_deltemp()
{
if [ -f "${tmp_file}" ]
then
rm -f "${tmp_file}" 2>/dev/null
fi
if [ -d "${tmp_dir}" ]
then
rm -rf "${tmp_dir}" 2>/dev/null
fi
}
################################################################
# f_remove: remove temporary files, start and maintain query log
#
f_remove()
{
# delete temporary files and directories
#
f_deltemp
# kill existing domain query log background process,
# housekeeping and start of a new process on daily basis
#
if [ "${query_ok}" = "true" ] && [ "${ntp_ok}" = "true" ]
then
query_date="$(date "+%Y%m%d")"
if [ -s "${query_pid}" ] && [ ! -f "${query_file}.${query_date}" ]
then
kill -9 $(< "${query_pid}") 2>/dev/null
> "${query_pid}"
find "${backup_dir}" -maxdepth 1 -type f -mtime +${query_history} -name "${query_name}.*" -exec rm -f {} \; 2>/dev/null
/usr/bin/logger -t "adblock[${pid}]" "kill old query log background process and do logfile housekeeping"
fi
if [ ! -s "${query_pid}" ]
then
( logread -f 2>/dev/null & printf -n "$!" > "${query_pid}" ) | egrep -o "(query\[A\].*)|([a-z0-9\.\-]* is ${query_ip}$)" >> "${query_file}.${query_date}" &
/usr/bin/logger -t "adblock[${pid}]" "start new domain query log background process"
fi
fi
# final log entry
#
/usr/bin/logger -t "adblock[${pid}]" "domain adblock processing finished (${script_ver})"
}
#####################################################
# f_restore: if available, restore last adlist backup
#
f_restore()
{
if [ "${backup_ok}" = "true" ] && [ -f "${backup_file}" ]
then
cp -f "${backup_file}" "${dns_file}" 2>/dev/null
/usr/bin/logger -t "adblock[${pid}]" "${restore_msg}, adlist backup restored"
printf "$(/bin/date "+%d.%m.%Y %H:%M:%S") - error: ${restore_msg}, adlist backup restored" >> "${log_file}"
else
> "${dns_file}"
/usr/bin/logger -t "adblock[${pid}]" "${restore_msg}, empty adlist generated"
printf "$(/bin/date "+%d.%m.%Y %H:%M:%S") - error: ${restore_msg}, empty adlist generated" >> "${log_file}"
fi
# restart dnsmasq
#
/etc/init.d/dnsmasq restart >/dev/null 2>&1
# remove files and exit
#
f_remove
exit 100
}
#######################################################
# f_wancheck: check for usable adblock update interface
#
f_wancheck()
{
if [ "${wan_ok}" = "true" ]
then
# wait for wan update interface(s)
#
while [ $((cnt)) -le $((max_cnt)) ]
do
for dev in ${wan_dev}
do
dev_out=$(< /sys/class/net/${dev}/operstate 2>/dev/null)
if [[ "${dev_out}" = "up" ]]
then
/usr/bin/logger -t "adblock[${pid}]" "get wan/update interface: ${dev}, after ${cnt} loops"
break 2
elif [ $((cnt)) -eq $((max_cnt)) ]
then
/usr/bin/logger -t "adblock[${pid}]" "no wan/update interface(s) found (${wan_dev})"
printf "$(/bin/date "+%d.%m.%Y %H:%M:%S") - error: no wan/update interface(s) found (${wan_dev})" >> "${log_file}"
restore_msg="no wan/update interface(s)"
f_restore
fi
done
sleep 1
cnt=$((cnt + 1))
done
fi
}
#####################################
# f_ntpcheck: check/get ntp time sync
#
f_ntpcheck()
{
if [ "${ntp_ok}" = "true" ]
then
# prepare ntp server pool
#
unset ntp_pool
for srv in ${ntp_srv}
do
ntp_pool="${ntp_pool} -p ${srv}"
done
# wait for ntp time sync
#
while [ $((cnt)) -le $((max_cnt)) ]
do
/usr/sbin/ntpd -nq ${ntp_pool} >/dev/null 2>&1
rc=$?
if [ $((rc)) -eq 0 ]
then
/usr/bin/logger -t "adblock[${pid}]" "get ntp time sync (${ntp_srv}), after ${cnt} loops"
break
elif [ $((cnt)) -eq $((max_cnt)) ]
then
ntp_ok="false"
/usr/bin/logger -t "adblock[${pid}]" "ntp time sync failed (${ntp_srv})"
printf "$(/bin/date "+%d.%m.%Y %H:%M:%S") - error: ntp time sync failed (${ntp_srv})" >> "${log_file}"
restore_msg="time sync failed"
f_restore
fi
sleep 1
cnt=$((cnt + 1))
done
fi
}
#################################################################
# f_dnscheck: dnsmasq health check with newly generated blocklist
#
f_dnscheck()
{
# check 1: dnsmasq startup
#
dns_status="$(logread -l 20 -e "dnsmasq" -e "FAILED to start up")"
if [ -z "${dns_status}" ]
then
# check 2: nslookup probe
#
dns_status="$(nslookup "${check_domain}" 2>/dev/null | grep "${adb_ip}")"
if [ -z "${dns_status}" ]
then
# create backup of new block list only, if both checks are OK and backup enabled
#
if [ "${backup_ok}" = "true" ]
then
cp -f "${dns_file}" "${backup_file}" 2>/dev/null
/usr/bin/logger -t "adblock[${pid}]" "new block list with ${adb_count} domains loaded, backup generated"
else
/usr/bin/logger -t "adblock[${pid}]" "new block list with ${adb_count} domains loaded"
fi
else
restore_msg="nslookup probe failed"
f_restore
fi
else
restore_msg="dnsmasq probe failed"
f_restore
fi
}
##########################################################
# f_footer: write footer with a few statistics to dns file
#
f_footer()
{
# count result of merged domain entries
#
adb_count="$(wc -l < "${dns_file}")"
# write file footer with timestamp and merged ad count sum
#
printf "%s\n" "###################################################" >> "${dns_file}"
printf "%s\n" "# last adblock file update: $(date +"%d.%m.%Y - %T")" >> "${dns_file}"
printf "%s\n" "# ${0##*/} (${script_ver}) - ${adb_count} ad/abuse domains blocked" >> "${dns_file}"
printf "%s\n" "# domain blacklist sources:" >> "${dns_file}"
for src in ${adb_source}
do
url="$(printf "${src}" | sed 's/\(\&ruleset=.*\)//g')"
printf "%s\n" "# ${url}" >> "${dns_file}"
done
printf "%s\n" "###################################################" >> "${dns_file}"
printf "%s\n" "# domain whitelist source:" >> "${dns_file}"
printf "%s\n" "# ${adb_whitelist}" >> "${dns_file}"
printf "%s\n" "###################################################" >> "${dns_file}"
}

209
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#!/bin/sh
#######################################################
# ad/abuse domain blocking script for dnsmasq/openwrt #
# written by Dirk Brenken (dirk@brenken.org) #
#######################################################
# LICENSE
# ========
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
###############
# environment #
###############
# set script version
#
script_ver="0.11.0"
# get current pid and script directory
#
pid=$$
script_dir="$(printf "${0}" | sed 's/\(.*\)\/.*/\1/')"
# set temp variables
#
tmp_file="$(mktemp -tu)"
tmp_dir="$(mktemp -d)"
# source in adblock configuration
#
if [ -r "/etc/adblock/adblock.conf" ]
then
. "/etc/adblock/adblock.conf"
else
/usr/bin/logger -t "adblock[${pid}]" "adblock configuration not found"
rm -rf "${tmp_dir}" 2>/dev/null
exit 200
fi
# source in adblock function library
#
if [ -r "${script_dir}/adblock-helper.sh" ]
then
. "${script_dir}/adblock-helper.sh"
else
/usr/bin/logger -t "adblock[${pid}]" "adblock function library not found"
rm -rf "${tmp_dir}" 2>/dev/null
exit 210
fi
################
# main program #
################
# call restore function on trap signals (HUP, INT, QUIT, BUS, SEGV, TERM)
#
trap "restore_msg='trap error'; f_restore" 1 2 3 10 11 15
# start logging
#
/usr/bin/logger -t "adblock[${pid}]" "domain adblock processing started (${script_ver})"
# check environment
#
f_envcheck
# check wan update interface(s)
#
f_wancheck
# check for ntp time sync
#
f_ntpcheck
# download shallalist archive
#
if [ "${shalla_ok}" = "true" ]
then
curl --insecure --max-time "${max_time}" "${shalla_url}" -o "${shalla_archive}" 2>/dev/null
rc=$?
if [ $((rc)) -eq 0 ]
then
/usr/bin/logger -t "adblock[${pid}]" "shallalist archive download finished"
else
/usr/bin/logger -t "adblock[${pid}]" "shallalist archive download failed (${shalla_url})"
printf "$(/bin/date "+%d.%m.%Y %H:%M:%S") - error: shallalist archive download failed (${shalla_url})" >> "${log_file}"
restore_msg="archive download failed"
f_restore
fi
# extract shallalist archive
#
tar -xzf "${shalla_archive}" -C "${tmp_dir}" 2>/dev/null
rc=$?
if [ $((rc)) -eq 0 ]
then
/usr/bin/logger -t "adblock[${pid}]" "shallalist archive extraction finished"
else
/usr/bin/logger -t "adblock[${pid}]" "shallalist archive extraction failed"
printf "$(/bin/date "+%d.%m.%Y %H:%M:%S") - error: shallalist archive extraction failed" >> "${log_file}"
restore_msg="archive extraction failed"
f_restore
fi
# merge selected shallalist categories
#
> "${shalla_file}"
for category in ${shalla_cat}
do
if [ -f "${tmp_dir}/BL/${category}/domains" ]
then
cat "${tmp_dir}/BL/${category}/domains" >> "${shalla_file}" 2>/dev/null
rc=$?
else
rc=220
fi
if [ $((rc)) -ne 0 ]
then
break
fi
done
# finish shallalist (pre-)processing
#
if [ $((rc)) -eq 0 ]
then
/usr/bin/logger -t "adblock[${pid}]" "shallalist (pre-)processing finished (${shalla_cat})"
else
/usr/bin/logger -t "adblock[${pid}]" "shallalist category merge failed (${rc}, ${shalla_cat})"
printf "$(/bin/date "+%d.%m.%Y %H:%M:%S") - error: shallalist category merge failed (${rc}, ${shalla_cat})" >> "${log_file}"
restore_msg="shallalist merge failed"
f_restore
fi
fi
# loop through domain source list,
# prepare output and store all extracted domains in temp file
#
for src in ${adb_source}
do
# download selected adblock sources
#
url="$(printf "${src}" | sed 's/\(\&ruleset=.*\)//g')"
check_url="$(printf "${url}" | sed -n '/^https:/p')"
if [ -n "${check_url}" ]
then
tmp_var="$(wget --timeout="${max_time}" --tries=1 --output-document=- "${url}" 2>/dev/null)"
rc=$?
else
tmp_var="$(curl --insecure --max-time "${max_time}" "${url}" 2>/dev/null)"
rc=$?
fi
# check download result and prepare domain output by regex patterns
#
if [ $((rc)) -eq 0 ] && [ -n "${tmp_var}" ]
then
eval "$(printf "${src}" | sed 's/\(.*\&ruleset=\)/ruleset=\$rset_/g')"
tmp_var="$(printf "%s\n" "${tmp_var}" | tr '[[:upper:]]' '[[:lower:]]')"
adb_count="$(printf "%s\n" "${tmp_var}" | eval "${ruleset}" | tee -a "${tmp_file}" | wc -l)"
/usr/bin/logger -t "adblock[${pid}]" "source download finished (${url}, ${adb_count} entries)"
elif [ $((rc)) -eq 0 ] && [ -z "${tmp_var}" ]
then
/usr/bin/logger -t "adblock[${pid}]" "empty source download finished (${url})"
else
/usr/bin/logger -t "adblock[${pid}]" "source download failed (${url})"
printf "$(/bin/date "+%d.%m.%Y %H:%M:%S") - error: source download failed (${url})" >> "${log_file}"
restore_msg="download failed"
f_restore
fi
done
# create empty destination file
#
> "${dns_file}"
# rewrite ad/abuse domain information to dns file,
# remove duplicates and whitelist entries
#
grep -vxf "${adb_whitelist}" < "${tmp_file}" | eval "${dns_format}" | sort -u 2>/dev/null >> "${dns_file}"
# write dns file footer
#
f_footer
# restart dnsmasq with newly generated block list
#
/etc/init.d/dnsmasq restart >/dev/null 2>&1
sleep 2
# dnsmasq health check
#
f_dnscheck
# remove files and exit
#
f_remove
exit 0

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<html>
<head></head>
<body>
<img src="/adblock.png" border=0 alt=""></img>
</body>
</html>

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<html>
<head></head>
<body>
<img src="/adblock.png" border=0 alt=""></img>
</body>
</html>