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openwrt-packages/net/adblock/files/adblock.sh
Dirk Brenken 35234924cb adblock: update 3.4.1 
* enable code to support Turris Omnia forthcoming upstream change
  (new kresd 'keep_cache' option) to preserve kresd DNS cache
* fix a 'status' race condition while the adblock process
  is running in parallel
* various small speed improvements
* rework debug output
* refine blacklist handling
* enable the (empty) blacklist source in the default config
* email notification supports mstmp, even without sendmail symlink
* email notification writes minimal status to log (one-liner)
* LuCI: refine logfile search term
* LuCI: Textarea 'autoscroll down' in logfile view
* LuCI: Left-align blocklist source table plus a more compact design

Signed-off-by: Dirk Brenken <dev@brenken.org>
2018-01-05 20:25:28 +01:00

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#!/bin/sh
# dns based ad/abuse domain blocking
# written by Dirk Brenken (dev@brenken.org)
# This is free software, licensed under the GNU General Public License v3.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# set initial defaults
#
LC_ALL=C
PATH="/usr/sbin:/usr/bin:/sbin:/bin"
adb_ver="3.4.1"
adb_sysver="unknown"
adb_enabled=0
adb_debug=0
adb_backup_mode=0
adb_whitelist_mode=0
adb_forcesrt=0
adb_forcedns=0
adb_notify=0
adb_notifycnt=0
adb_triggerdelay=0
adb_backup=0
adb_backupdir="/mnt"
adb_fetchutil="/usr/bin/wget"
adb_fetchparm="--quiet --no-cache --no-cookies --max-redirect=0 --timeout=10 --no-check-certificate -O"
adb_dns="dnsmasq"
adb_dnsprefix="adb_list"
adb_dnsfile="${adb_dnsprefix}.overall"
adb_dnsflush=0
adb_whitelist="/etc/adblock/adblock.whitelist"
adb_rtfile="/tmp/adb_runtime.json"
adb_hashutil="$(command -v sha256sum)"
adb_hashold=""
adb_hashnew=""
adb_cnt=0
adb_rc=0
adb_action="${1:-"start"}"
# load adblock environment
#
f_envload()
{
local dns_up sys_call sys_desc sys_model sys_ver cnt=0
# create temp files and directories
#
adb_tmpload="$(mktemp -tu)"
adb_tmpfile="$(mktemp -tu)"
adb_tmpdir="$(mktemp -p /tmp -d)"
# get system information
#
sys_call="$(ubus -S call system board 2>/dev/null)"
if [ -n "${sys_call}" ]
then
sys_desc="$(printf '%s' "${sys_call}" | jsonfilter -e '@.release.description')"
sys_model="$(printf '%s' "${sys_call}" | jsonfilter -e '@.model')"
sys_ver="$(cat /etc/turris-version 2>/dev/null)"
if [ -n "${sys_ver}" ]
then
sys_desc="${sys_desc}/${sys_ver}"
fi
adb_sysver="${sys_model}, ${sys_desc}"
fi
# check hash utility
#
if [ ! -x "${adb_hashutil}" ]
then
adb_hashutil="$(command -v md5sum)"
fi
# source in system libraries
#
if [ -r "/lib/functions.sh" ] && [ -r "/usr/share/libubox/jshn.sh" ]
then
. "/lib/functions.sh"
. "/usr/share/libubox/jshn.sh"
else
f_log "err" "system libraries not found"
fi
# parse 'global' and 'extra' section by callback
#
config_cb()
{
local type="${1}"
if [ "${type}" = "adblock" ]
then
option_cb()
{
local option="${1}"
local value="${2}"
eval "${option}=\"${value}\""
}
else
reset_cb
fi
}
# parse 'source' typed sections
#
parse_config()
{
local value opt section="${1}" options="enabled adb_src adb_src_rset adb_src_cat"
eval "adb_sources=\"${adb_sources} ${section}\""
for opt in ${options}
do
config_get value "${section}" "${opt}"
if [ -n "${value}" ]
then
eval "${opt}_${section}=\"${value}\""
fi
done
}
# load adblock config
#
config_load adblock
config_foreach parse_config source
# check dns backend
#
case "${adb_dns}" in
dnsmasq)
adb_dnsinstance="${adb_dnsinstance:-"0"}"
adb_dnsuser="${adb_dnsuser:-"dnsmasq"}"
adb_dnsdir="${adb_dnsdir:-"/tmp"}"
adb_dnsheader=""
adb_dnsformat="awk '{print \"server=/\"\$0\"/\"}'"
if [ ${adb_whitelist_mode} -eq 1 ]
then
adb_dnsformat="awk '{print \"server=/\"\$0\"/#\"}'"
adb_dnsblock="server=/#/"
fi
;;
unbound)
adb_dnsinstance="${adb_dnsinstance:-"0"}"
adb_dnsuser="${adb_dnsuser:-"unbound"}"
adb_dnsdir="${adb_dnsdir:-"/var/lib/unbound"}"
adb_dnsheader=""
adb_dnsformat="awk '{print \"local-zone: \042\"\$0\"\042 static\"}'"
if [ ${adb_whitelist_mode} -eq 1 ]
then
adb_dnsformat="awk '{print \"local-zone: \042\"\$0\"\042 transparent\"}'"
adb_dnsblock="local-zone: \".\" static"
fi
;;
named)
adb_dnsinstance="${adb_dnsinstance:-"0"}"
adb_dnsuser="${adb_dnsuser:-"bind"}"
adb_dnsdir="${adb_dnsdir:-"/var/lib/bind"}"
adb_dnsheader="\$TTL 2h"$'\n'"@ IN SOA localhost. root.localhost. (1 6h 1h 1w 2h)"$'\n'" IN NS localhost."
adb_dnsformat="awk '{print \"\"\$0\" CNAME .\n*.\"\$0\" CNAME .\"}'"
if [ ${adb_whitelist_mode} -eq 1 ]
then
adb_dnsformat="awk '{print \"\"\$0\" CNAME rpz-passthru.\n*.\"\$0\" CNAME rpz-passthru.\"}'"
adb_dnsblock="* CNAME ."
fi
;;
kresd)
adb_dnsinstance="${adb_dnsinstance:-"0"}"
adb_dnsuser="${adb_dnsuser:-"root"}"
adb_dnsdir="${adb_dnsdir:-"/etc/kresd"}"
adb_dnsheader="\$TTL 2h"$'\n'"@ IN SOA localhost. root.localhost. (1 6h 1h 1w 2h)"$'\n'" IN NS localhost."
adb_dnsformat="awk '{print \"\"\$0\" CNAME .\n*.\"\$0\" CNAME .\"}'"
if [ ${adb_whitelist_mode} -eq 1 ]
then
adb_dnsformat="awk '{print \"\"\$0\" CNAME rpz-passthru.\n*.\"\$0\" CNAME rpz-passthru.\"}'"
adb_dnsblock="* CNAME ."
fi
;;
dnscrypt-proxy)
adb_dnsinstance="${adb_dnsinstance:-"0"}"
adb_dnsuser="${adb_dnsuser:-"nobody"}"
adb_dnsdir="${adb_dnsdir:-"/tmp"}"
adb_dnsheader=""
adb_dnsformat="awk '{print \$0}'"
;;
esac
# check adblock status
#
if [ ${adb_enabled} -eq 0 ]
then
f_extconf
f_rmdns
f_jsnup
f_log "info" "adblock is currently disabled, please set adb_enabled to '1' to use this service"
f_rmtemp
exit 0
fi
if [ "${adb_dns}" = "dnsmasq" ] && [ ${adb_dnsinstance} -ne 0 ]
then
adb_dnsfile="${adb_dnsprefix}.overall.${adb_dnsinstance}"
fi
if [ -d "${adb_dnsdir}" ] && [ ! -f "${adb_dnsdir}/${adb_dnsfile}" ]
then
printf '%s\n' "${adb_dnsheader}" > "${adb_dnsdir}/${adb_dnsfile}"
fi
case "${adb_action}" in
start|restart|reload)
> "${adb_rtfile}"
if [ "${adb_action}" = "start" ] && [ "${adb_trigger}" = "timed" ]
then
sleep ${adb_triggerdelay}
fi
;;
esac
while [ ${cnt} -le 30 ]
do
dns_up="$(ubus -S call service list "{\"name\":\"${adb_dns}\"}" 2>/dev/null | jsonfilter -l1 -e "@[\"${adb_dns}\"].instances.*.running" 2>/dev/null)"
if [ "${dns_up}" = "true" ]
then
break
fi
sleep 1
cnt=$((cnt+1))
done
if [ -z "${adb_dns}" ] || [ -z "${adb_dnsformat}" ] || [ ! -x "$(command -v ${adb_dns})" ] || [ ! -d "${adb_dnsdir}" ]
then
f_log "err" "'${adb_dns}' not running, DNS backend not found"
fi
}
# check environment
#
f_envcheck()
{
local ssl_lib
f_log "info" "start adblock processing (${adb_action})"
# check external uci config files
#
f_extconf
# check fetch utility
#
if [ -x "${adb_fetchutil}" ]
then
if [ "$(readlink -fn "${adb_fetchutil}")" = "/usr/bin/wget-nossl" ]
then
adb_fetchparm="--quiet --no-cache --no-cookies --max-redirect=0 --timeout=10 -O"
elif [ "$(readlink -fn "${adb_fetchutil}")" = "/bin/busybox" ] ||
([ "$(readlink -fn "/bin/wget")" = "/bin/busybox" ] && [ "$(readlink -fn "${adb_fetchutil}")" != "/usr/bin/wget" ])
then
adb_fetchutil="/bin/busybox"
adb_fetchparm="-q -O"
else
ssl_lib="built-in"
fi
fi
if [ ! -x "${adb_fetchutil}" ] && [ "$(readlink -fn "/bin/wget")" = "/bin/uclient-fetch" ]
then
adb_fetchutil="/bin/uclient-fetch"
if [ -f "/lib/libustream-ssl.so" ]
then
adb_fetchparm="-q --timeout=10 --no-check-certificate -O"
ssl_lib="libustream-ssl"
else
adb_fetchparm="-q --timeout=10 -O"
fi
fi
if [ ! -x "${adb_fetchutil}" ] || [ -z "${adb_fetchutil}" ] || [ -z "${adb_fetchparm}" ]
then
f_log "err" "no download utility found, please install 'uclient-fetch' with 'libustream-mbedtls' or the full 'wget' package"
fi
adb_fetchinfo="${adb_fetchutil##*/} (${ssl_lib:-"-"})"
}
# remove temp files and directories
#
f_rmtemp()
{
if [ -d "${adb_tmpdir}" ]
then
rm -f "${adb_tmpload}"
rm -f "${adb_tmpfile}"
rm -rf "${adb_tmpdir}"
fi
}
# remove dns related files and directories
#
f_rmdns()
{
if [ -n "${adb_dns}" ]
then
f_hash
printf '%s\n' "${adb_dnsheader}" > "${adb_dnsdir}/${adb_dnsfile}"
> "${adb_dnsdir}/.${adb_dnsfile}"
> "${adb_rtfile}"
rm -f "${adb_backupdir}/${adb_dnsprefix}"*.gz
f_hash
if [ ${?} -eq 1 ]
then
f_dnsup
fi
fi
f_log "debug" "f_rmdns::: dns: ${adb_dns}, dns_dir: ${adb_dnsdir}, dns_prefix: ${adb_dnsprefix}, dns_file: ${adb_dnsfile}, rt_file: ${adb_rtfile}, backup_dir: ${adb_backupdir}"
}
# commit uci changes
#
f_uci()
{
local change config="${1}"
if [ -n "${config}" ]
then
change="$(uci -q changes "${config}" | awk '{ORS=" "; print $0}')"
if [ -n "${change}" ]
then
uci -q commit "${config}"
case "${config}" in
firewall)
/etc/init.d/firewall reload >/dev/null 2>&1
;;
*)
/etc/init.d/"${adb_dns}" reload >/dev/null 2>&1
;;
esac
fi
fi
f_log "debug" "f_uci ::: config: ${config}, change: ${change}"
}
# list/overall count
#
f_count()
{
local mode="${1}"
adb_cnt=0
if [ -s "${adb_dnsdir}/${adb_dnsfile}" ] && ([ -z "${mode}" ] || [ "${mode}" = "final" ])
then
if [ "${adb_dns}" = "named" ] || [ "${adb_dns}" = "kresd" ]
then
adb_cnt="$(( ($(wc -l 2>/dev/null < "${adb_dnsdir}/${adb_dnsfile}") - $(printf "%s" "${adb_dnsheader}" | grep -c "^")) / 2 ))"
else
adb_cnt="$(wc -l 2>/dev/null < "${adb_dnsdir}/${adb_dnsfile}")"
fi
elif [ -s "${adb_tmpfile}" ]
then
adb_cnt="$(wc -l 2>/dev/null < "${adb_tmpfile}")"
fi
}
# set external config options
#
f_extconf()
{
local uci_config
case "${adb_dns}" in
dnsmasq)
uci_config="dhcp"
if [ ${adb_enabled} -eq 1 ] && [ -z "$(uci -q get dhcp.@dnsmasq[${adb_dnsinstance}].serversfile | grep -Fo "${adb_dnsdir}/${adb_dnsfile}")" ]
then
uci -q set dhcp.@dnsmasq[${adb_dnsinstance}].serversfile="${adb_dnsdir}/${adb_dnsfile}"
elif [ ${adb_enabled} -eq 0 ] && [ -n "$(uci -q get dhcp.@dnsmasq[${adb_dnsinstance}].serversfile | grep -Fo "${adb_dnsdir}/${adb_dnsfile}")" ]
then
uci -q delete dhcp.@dnsmasq[${adb_dnsinstance}].serversfile
fi
;;
kresd)
uci_config="resolver"
if [ ${adb_enabled} -eq 1 ] && [ -z "$(uci -q get resolver.kresd.rpz_file | grep -Fo "${adb_dnsdir}/${adb_dnsfile}")" ]
then
uci -q add_list resolver.kresd.rpz_file="${adb_dnsdir}/${adb_dnsfile}"
elif [ ${adb_enabled} -eq 0 ] && [ -n "$(uci -q get resolver.kresd.rpz_file | grep -Fo "${adb_dnsdir}/${adb_dnsfile}")" ]
then
uci -q del_list resolver.kresd.rpz_file="${adb_dnsdir}/${adb_dnsfile}"
fi
if [ ${adb_enabled} -eq 1 ] && [ ${adb_dnsflush} -eq 0 ] && [ "$(uci -q get resolver.kresd.keep_cache)" != "1" ]
then
uci -q set resolver.kresd.keep_cache="1"
elif [ ${adb_enabled} -eq 0 ] || ([ ${adb_dnsflush} -eq 1 ] && [ "$(uci -q get resolver.kresd.keep_cache)" = "1" ])
then
uci -q delete resolver.kresd.keep_cache
fi
;;
esac
f_uci "${uci_config}"
uci_config="firewall"
if [ ${adb_enabled} -eq 1 ] && [ ${adb_forcedns} -eq 1 ] && \
[ -z "$(uci -q get firewall.adblock_dns)" ] && [ $(/etc/init.d/firewall enabled; printf "%u" ${?}) -eq 0 ]
then
uci -q set firewall.adblock_dns="redirect"
uci -q set firewall.adblock_dns.name="Adblock DNS"
uci -q set firewall.adblock_dns.src="lan"
uci -q set firewall.adblock_dns.proto="tcp udp"
uci -q set firewall.adblock_dns.src_dport="53"
uci -q set firewall.adblock_dns.dest_port="53"
uci -q set firewall.adblock_dns.target="DNAT"
elif [ -n "$(uci -q get firewall.adblock_dns)" ] && ([ ${adb_enabled} -eq 0 ] || [ ${adb_forcedns} -eq 0 ])
then
uci -q delete firewall.adblock_dns
fi
f_uci "${uci_config}"
}
# restart of the dns backend
#
f_dnsup()
{
local dns_up cache_util cache_rc cnt=0
if [ ${adb_dnsflush} -eq 0 ] && [ ${adb_enabled} -eq 1 ] && [ "${adb_rc}" -eq 0 ]
then
case "${adb_dns}" in
dnsmasq)
killall -q -HUP "${adb_dns}"
cache_rc=${?}
;;
unbound)
cache_util="$(command -v unbound-control)"
if [ -x "${cache_util}" ] && [ -f "${adb_dnsdir}"/unbound.conf ]
then
"${cache_util}" -c "${adb_dnsdir}"/unbound.conf dump_cache > "${adb_tmpdir}"/adb_cache.dump 2>/dev/null
fi
"/etc/init.d/${adb_dns}" restart >/dev/null 2>&1
;;
kresd)
cache_util="keep_cache"
"/etc/init.d/${adb_dns}" restart >/dev/null 2>&1
cache_rc=${?}
;;
named)
cache_util="$(command -v rndc)"
if [ -x "${cache_util}" ] && [ -f /etc/bind/rndc.conf ]
then
"${cache_util}" -c /etc/bind/rndc.conf reload >/dev/null 2>&1
cache_rc=${?}
else
"/etc/init.d/${adb_dns}" restart >/dev/null 2>&1
fi
;;
*)
"/etc/init.d/${adb_dns}" restart >/dev/null 2>&1
;;
esac
else
"/etc/init.d/${adb_dns}" restart >/dev/null 2>&1
fi
adb_rc=1
while [ ${cnt} -le 10 ]
do
dns_up="$(ubus -S call service list "{\"name\":\"${adb_dns}\"}" | jsonfilter -l1 -e "@[\"${adb_dns}\"].instances.*.running")"
if [ "${dns_up}" = "true" ]
then
case "${adb_dns}" in
unbound)
cache_util="$(command -v unbound-control)"
if [ -x "${cache_util}" ] && [ -s "${adb_tmpdir}"/adb_cache.dump ]
then
while [ ${cnt} -le 10 ]
do
"${cache_util}" -c "${adb_dnsdir}"/unbound.conf load_cache < "${adb_tmpdir}"/adb_cache.dump >/dev/null 2>&1
cache_rc=${?}
if [ ${cache_rc} -eq 0 ]
then
break
fi
cnt=$((cnt+1))
sleep 1
done
fi
;;
esac
adb_rc=0
break
fi
cnt=$((cnt+1))
sleep 1
done
f_log "debug" "f_dnsup::: cache_util: ${cache_util:-"-"}, cache_rc: ${cache_rc}, cache_flush: ${adb_dnsflush}, cache_cnt: ${cnt}, out_rc: ${adb_rc}"
}
# backup/restore/remove blocklists
#
f_list()
{
local mode="${1}" in_rc="${adb_rc}"
case "${mode}" in
backup)
if [ -d "${adb_backupdir}" ]
then
gzip -cf "${adb_tmpfile}" > "${adb_backupdir}/${adb_dnsprefix}.${src_name}.gz" 2>/dev/null
adb_rc=${?}
fi
;;
restore)
if [ -d "${adb_backupdir}" ] && [ -f "${adb_backupdir}/${adb_dnsprefix}.${src_name}.gz" ]
then
gunzip -cf "${adb_backupdir}/${adb_dnsprefix}.${src_name}.gz" > "${adb_tmpfile}" 2>/dev/null
adb_rc=${?}
fi
;;
remove)
if [ -d "${adb_backupdir}" ]
then
rm -f "${adb_backupdir}/${adb_dnsprefix}.${src_name}.gz"
fi
adb_rc=${?}
;;
merge)
if [ -s "${adb_tmpfile}" ]
then
cat "${adb_tmpfile}" >> "${adb_tmpdir}/${adb_dnsfile}"
adb_rc=${?}
fi
;;
final)
if [ -s "${adb_tmpdir}/tmp.whitelist" ]
then
grep -vf "${adb_tmpdir}/tmp.whitelist" "${adb_tmpdir}/${adb_dnsfile}" | eval "${adb_dnsformat}" > "${adb_dnsdir}/${adb_dnsfile}"
else
eval "${adb_dnsformat}" "${adb_tmpdir}/${adb_dnsfile}" > "${adb_dnsdir}/${adb_dnsfile}"
fi
if [ ${?} -eq 0 ] && [ -n "${adb_dnsheader}" ]
then
printf '%s\n' "${adb_dnsheader}" | cat - "${adb_dnsdir}/${adb_dnsfile}" > "${adb_tmpdir}/${adb_dnsfile}"
cat "${adb_tmpdir}/${adb_dnsfile}" > "${adb_dnsdir}/${adb_dnsfile}"
fi
adb_rc=${?}
;;
esac
f_count "${mode}"
f_log "debug" "f_list ::: mode: ${mode}, cnt: ${adb_cnt}, in_rc: ${in_rc}, out_rc: ${adb_rc}"
}
# top level domain compression
#
f_tld()
{
local cnt cnt_srt cnt_tld source="${1}" temp="${adb_tmpload}"
cnt="$(wc -l 2>/dev/null < "${source}")"
awk -F "." '{for(f=NF;f>1;f--)printf "%s.",$f;print $1}' "${source}" 2>/dev/null | sort -u > "${temp}"
cnt_srt="$(wc -l 2>/dev/null < "${temp}")"
awk '{if(NR==1){tld=$NF};while(getline){if($NF!~tld"\\."){print tld;tld=$NF}}print tld}' "${temp}" 2>/dev/null |\
awk -F "." '{for(f=NF;f>1;f--)printf "%s.",$f;print $1}' 2>/dev/null | sort > "${source}"
cnt_tld="$(wc -l 2>/dev/null < "${source}")"
f_log "debug" "f_tld ::: source: ${source}, cnt: ${cnt}, cnt_srt: ${cnt_srt}, cnt_tld: ${cnt_tld}"
}
# blocklist hash compare
#
f_hash()
{
local hash hash_rc=1
if [ -x "${adb_hashutil}" ] && [ -f "${adb_dnsdir}/${adb_dnsfile}" ]
then
hash="$(${adb_hashutil} "${adb_dnsdir}/${adb_dnsfile}" 2>/dev/null | awk '{print $1}')"
if [ -z "${adb_hashold}" ] && [ -n "${hash}" ]
then
adb_hashold="${hash}"
elif [ -z "${adb_hashnew}" ] && [ -n "${hash}" ]
then
adb_hashnew="${hash}"
fi
if [ -n "${adb_hashold}" ] && [ -n "${adb_hashnew}" ]
then
if [ "${adb_hashold}" = "${adb_hashnew}" ]
then
hash_rc=0
fi
adb_hashold=""
adb_hashnew=""
fi
fi
f_log "debug" "f_hash ::: hash_util: ${adb_hashutil}, hash: ${hash}, out_rc: ${hash_rc}"
return ${hash_rc}
}
# suspend/resume adblock processing
#
f_switch()
{
local mode="${1}"
if [ ! -s "${adb_dnsdir}/.${adb_dnsfile}" ] && [ "${mode}" = "suspend" ]
then
f_hash
cat "${adb_dnsdir}/${adb_dnsfile}" > "${adb_dnsdir}/.${adb_dnsfile}"
printf '%s\n' "${adb_dnsheader}" > "${adb_dnsdir}/${adb_dnsfile}"
f_hash
elif [ -s "${adb_dnsdir}/.${adb_dnsfile}" ] && [ "${mode}" = "resume" ]
then
f_hash
cat "${adb_dnsdir}/.${adb_dnsfile}" > "${adb_dnsdir}/${adb_dnsfile}"
> "${adb_dnsdir}/.${adb_dnsfile}"
f_hash
fi
if [ ${?} -eq 1 ]
then
f_dnsup
f_jsnup
f_log "info" "${mode} adblock processing"
fi
}
# query blocklist for certain (sub-)domains
#
f_query()
{
local search result cnt
local domain="${1}"
local tld="${domain#*.}"
if [ -z "${domain}" ] || [ "${domain}" = "${tld}" ]
then
printf "%s\n" "::: invalid domain input, please submit a single domain, e.g. 'doubleclick.net'"
else
cd "${adb_dnsdir}"
while [ "${domain}" != "${tld}" ]
do
search="${domain//./\.}"
if [ "${adb_dns}" = "dnsmasq" ] || [ "${adb_dns}" = "unbound" ]
then
result="$(awk -F '/|\"' "/[\/\"\.]${search}/{i++;{printf(\" + %s\n\",\$2)};if(i>9){exit}}" "${adb_dnsfile}")"
else
result="$(awk "/(^[^\*][[:alpha:]]*[\.]+${search}|^${search})/{i++;{printf(\" + %s\n\",\$1)};if(i>9){exit}}" "${adb_dnsfile}")"
fi
printf "%s\n" "::: results for domain '${domain}' (max. 10)"
printf "%s\n" "${result:-" - no match"}"
domain="${tld}"
tld="${domain#*.}"
done
fi
}
# update runtime information
#
f_jsnup()
{
local status bg_pid mode="normal mode" rundate="$(/bin/date "+%d.%m.%Y %H:%M:%S")"
if [ ${adb_rc} -gt 0 ]
then
status="error"
elif [ ${adb_enabled} -eq 0 ]
then
status="disabled"
elif [ -s "${adb_dnsdir}/.${adb_dnsfile}" ]
then
status="paused"
else
status="enabled"
f_count
fi
if [ ${adb_backup_mode} -eq 1 ]
then
mode="normal/backup mode"
elif [ ${adb_whitelist_mode} -eq 1 ]
then
mode="whitelist mode"
fi
if [ -z "${adb_fetchinfo}" ] && [ -s "${adb_rtfile}" ]
then
json_load "$(cat "${adb_rtfile}" 2>/dev/null)"
json_select data
json_get_var adb_fetchinfo "fetch_utility"
fi
json_init
json_add_object "data"
json_add_string "adblock_status" "${status}"
json_add_string "adblock_version" "${adb_ver}"
json_add_string "overall_domains" "${adb_cnt} (${mode})"
json_add_string "fetch_utility" "${adb_fetchinfo:-"-"}"
json_add_string "dns_backend" "${adb_dns} (${adb_dnsdir})"
json_add_string "last_rundate" "${rundate}"
json_add_string "system_release" "${adb_sysver}"
json_close_object
json_dump > "${adb_rtfile}"
if [ ${adb_notify} -eq 1 ] && [ -x /etc/adblock/adblock.notify ] && ([ "${status}" = "error" ] ||\
([ "${status}" = "enabled" ] && [ ${adb_whitelist_mode} -eq 0 ] && [ ${adb_cnt} -le ${adb_notifycnt} ]))
then
(/etc/adblock/adblock.notify >/dev/null 2>&1) &
bg_pid=${!}
fi
f_log "debug" "f_jsnup::: status: ${status}, mode: ${mode}, cnt: ${adb_cnt}, notify: ${adb_notify}, notify_cnt: ${adb_notifycnt}, notify_pid: ${bg_pid:-"-"}"
}
# write to syslog
#
f_log()
{
local class="${1}" log_msg="${2}"
if [ -n "${log_msg}" ] && ([ "${class}" != "debug" ] || [ ${adb_debug} -eq 1 ])
then
logger -p "${class}" -t "adblock-[${adb_ver}]" "${log_msg}"
if [ "${class}" = "err" ]
then
f_rmdns
f_jsnup
f_rmtemp
logger -p "${class}" -t "adblock-[${adb_ver}]" "Please also check 'https://github.com/openwrt/packages/blob/master/net/adblock/files/README.md' (${adb_sysver})"
exit 1
fi
fi
}
# main function for blocklist processing
#
f_main()
{
local src_name src_rset shalla_archive enabled url mem_total="$(awk '/^MemTotal/ {print int($2/1000)}' "/proc/meminfo")"
f_log "debug" "f_main ::: dns: ${adb_dns}, fetch_util: ${adb_fetchinfo}, backup: ${adb_backup}, backup_mode: ${adb_backup_mode}, whitelist_mode: ${adb_whitelist_mode}, force_srt: ${adb_forcesrt}, force_dns: ${adb_forcedns}, mem_total: ${mem_total}"
> "${adb_rtfile}"
> "${adb_dnsdir}/.${adb_dnsfile}"
> "${adb_tmpdir}/tmp.whitelist"
# prepare whitelist entries
#
if [ -s "${adb_whitelist}" ]
then
if [ ${adb_whitelist_mode} -eq 1 ] && [ "${adb_dns}" != "dnscrypt-proxy" ]
then
adb_whitelist_rset="\$0~/^([[:alnum:]_-]+\.){1,}[[:alpha:]]+([[:space:]]|$)/{print tolower(\$1)}"
else
adb_whitelist_rset="\$0~/^([[:alnum:]_-]+\.){1,}[[:alpha:]]+([[:space:]]|$)/{gsub(\"\\\.\",\"\\\.\",\$1);print tolower(\"^\"\$1\"\\\|\\\.\"\$1)}"
fi
awk "${adb_whitelist_rset}" "${adb_whitelist}" > "${adb_tmpdir}/tmp.whitelist"
fi
# whitelist mode processing
#
if [ ${adb_whitelist_mode} -eq 1 ] && [ "${adb_dns}" != "dnscrypt-proxy" ]
then
f_hash
f_tld "${adb_tmpdir}/tmp.whitelist"
eval "${adb_dnsformat}" "${adb_tmpdir}/tmp.whitelist" > "${adb_dnsdir}/${adb_dnsfile}"
printf '%s\n' "${adb_dnsblock}" >> "${adb_dnsdir}/${adb_dnsfile}"
if [ -n "${adb_dnsheader}" ]
then
printf '%s\n' "${adb_dnsheader}" | cat - "${adb_dnsdir}/${adb_dnsfile}" > "${adb_tmpdir}/${adb_dnsfile}"
cat "${adb_tmpdir}/${adb_dnsfile}" > "${adb_dnsdir}/${adb_dnsfile}"
fi
f_hash
if [ ${?} -eq 1 ]
then
f_dnsup
fi
f_jsnup
if [ ${adb_rc} -eq 0 ]
then
f_log "info" "whitelist with overall ${adb_cnt} domains loaded successfully (${adb_sysver})"
return 0
else
f_log "err" "dns backend restart with active whitelist failed"
fi
fi
# normal & backup mode processing
#
for src_name in ${adb_sources}
do
eval "enabled=\"\${enabled_${src_name}}\""
eval "url=\"\${adb_src_${src_name}}\""
eval "src_rset=\"\${adb_src_rset_${src_name}}\""
> "${adb_tmpload}"
> "${adb_tmpfile}"
adb_rc=1
# basic pre-checks
#
f_log "debug" "f_main ::: name: ${src_name}, enabled: ${enabled}"
if [ "${enabled}" != "1" ] || [ -z "${url}" ] || [ -z "${src_rset}" ]
then
f_list remove
continue
fi
# backup mode
#
if [ ${adb_backup_mode} -eq 1 ] && [ "${adb_action}" = "start" ] && [ "${src_name}" != "blacklist" ]
then
f_list restore
if [ ${adb_rc} -eq 0 ] && [ -s "${adb_tmpfile}" ]
then
f_list merge
continue
fi
fi
# download blocklist
#
if [ "${src_name}" = "blacklist" ]
then
if [ -s "${url}" ]
then
cat "${url}" > "${adb_tmpload}"
adb_rc=${?}
fi
elif [ "${src_name}" = "shalla" ]
then
shalla_archive="${adb_tmpdir}/shallalist.tar.gz"
"${adb_fetchutil}" ${adb_fetchparm} "${shalla_archive}" "${url}" 2>/dev/null
adb_rc=${?}
if [ ${adb_rc} -eq 0 ]
then
for category in ${adb_src_cat_shalla}
do
tar -xOzf "${shalla_archive}" "BL/${category}/domains" >> "${adb_tmpload}"
adb_rc=${?}
if [ ${adb_rc} -ne 0 ]
then
break
fi
done
fi
rm -f "${shalla_archive}"
rm -rf "${adb_tmpdir}/BL"
else
"${adb_fetchutil}" ${adb_fetchparm} "${adb_tmpload}" "${url}" 2>/dev/null
adb_rc=${?}
fi
# check download result and prepare list output
#
if [ ${adb_rc} -eq 0 ] && [ -s "${adb_tmpload}" ]
then
awk "${src_rset}" "${adb_tmpload}" 2>/dev/null > "${adb_tmpfile}"
if [ -s "${adb_tmpfile}" ]
then
if [ ${mem_total} -lt 64 ] && [ ${adb_forcesrt} -eq 0 ]
then
f_tld "${adb_tmpfile}"
fi
if [ ${adb_backup} -eq 1 ] && [ "${src_name}" != "blacklist" ]
then
f_list backup
fi
elif [ ${adb_backup} -eq 1 ]
then
f_list restore
fi
elif [ ${adb_backup} -eq 1 ] && [ "${src_name}" != "blacklist" ]
then
f_list restore
fi
# list merge
#
if [ ${adb_rc} -eq 0 ] && [ -s "${adb_tmpfile}" ]
then
f_list merge
if [ ${adb_rc} -ne 0 ]
then
f_list remove
fi
else
f_list remove
fi
done
# overall sort and conditional dns restart
#
f_hash
if [ -s "${adb_tmpdir}/${adb_dnsfile}" ]
then
if [ ${mem_total} -ge 64 ] || [ ${adb_forcesrt} -eq 1 ]
then
f_tld "${adb_tmpdir}/${adb_dnsfile}"
fi
f_list final
else
> "${adb_dnsdir}/${adb_dnsfile}"
fi
chown "${adb_dnsuser}" "${adb_dnsdir}/${adb_dnsfile}" 2>/dev/null
f_hash
if [ ${?} -eq 1 ]
then
f_dnsup
fi
f_jsnup
if [ ${adb_rc} -eq 0 ]
then
f_log "info" "blocklist with overall ${adb_cnt} domains loaded successfully (${adb_sysver})"
else
f_log "err" "dns backend restart with active blocklist failed"
fi
}
# handle different adblock actions
#
f_envload
case "${adb_action}" in
stop)
f_rmdns
;;
restart)
f_rmdns
f_envcheck
f_main
;;
suspend)
f_switch suspend
;;
resume)
f_switch resume
;;
query)
f_query "${2}"
;;
start|reload)
f_envcheck
f_main
;;
esac
f_rmtemp
exit ${adb_rc}
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