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670 lines
19 KiB
670 lines
19 KiB
#!/bin/sh
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##############################################
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# function library used by adblock-update.sh #
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# written by Dirk Brenken (dirk@brenken.org) #
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##############################################
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#####################################
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# f_envload: load adblock environment
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#
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f_envload()
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{
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# source in openwrt function library
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#
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if [ -r "/lib/functions.sh" ]
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then
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. /lib/functions.sh
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else
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rc=510
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f_log "openwrt function library not found" "${rc}"
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f_deltemp
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fi
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# source in openwrt json helpers library
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#
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if [ -r "/usr/share/libubox/jshn.sh" ]
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then
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. "/usr/share/libubox/jshn.sh"
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else
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rc=515
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f_log "openwrt json helpers library not found" "${rc}"
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f_deltemp
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fi
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# get list with all installed openwrt packages
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#
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pkg_list="$(opkg list-installed 2>/dev/null)"
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if [ -z "${pkg_list}" ]
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then
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rc=520
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f_log "empty openwrt package list" "${rc}"
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f_deltemp
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fi
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}
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######################################################
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# f_envparse: parse adblock config and set environment
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#
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f_envparse()
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{
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# set the C locale, characters are single bytes, the charset is ASCII
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# speeds up sort, grep etc., guarantees unique domains
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#
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LC_ALL=C
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# set initial defaults (may be overwritten by adblock config options)
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#
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adb_if="adblock"
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adb_minspace="20000"
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adb_maxtime="60"
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adb_maxloop="5"
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# adblock device name auto detection
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# derived from first entry in openwrt lan ifname config
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#
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adb_dev="$(uci get network.lan.ifname 2>/dev/null)"
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adb_dev="${adb_dev/ *}"
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# adblock ntp server name auto detection
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# derived from ntp list found in openwrt ntp server config
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#
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adb_ntpsrv="$(uci get system.ntp.server 2>/dev/null)"
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# function to read/set global options by callback,
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# prepare list items and build option list for all others
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#
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config_cb()
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{
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local type="${1}"
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local name="${2}"
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if [ "${type}" = "adblock" ]
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then
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option_cb()
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{
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local option="${1}"
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local value="${2}"
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eval "${option}=\"${value}\""
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}
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else
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option_cb()
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{
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local option="${1}"
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local value="${2}"
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local opt_out="$(printf "${option}" | sed -n '/.*_ITEM[0-9]$/p; /.*_LENGTH$/p; /enabled/p')"
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if [ -z "${opt_out}" ]
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then
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all_options="${all_options} ${option}"
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fi
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}
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list_cb()
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{
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local list="${1}"
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local value="${2}"
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if [ "${list}" = "adb_wanlist" ]
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then
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adb_wandev="${adb_wandev} ${value}"
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elif [ "${list}" = "adb_ntplist" ]
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then
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adb_ntpsrv="${adb_ntpsrv} ${value}"
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elif [ "${list}" = "adb_catlist" ]
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then
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adb_cat_shalla="${adb_cat_shalla} ${value}"
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fi
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}
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fi
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}
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# function to iterate through option list, read/set all options in "enabled" sections
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#
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parse_config()
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{
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local config="${1}"
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config_get switch "${config}" "enabled"
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if [ "${switch}" = "1" ]
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then
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for option in ${all_options}
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do
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config_get value "${config}" "${option}"
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if [ -n "${value}" ]
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then
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local opt_src="$(printf "${option}" | sed -n '/^adb_src_[a-z0-9]*$/p')"
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if [ -n "${opt_src}" ]
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then
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adb_sources="${adb_sources} ${value}"
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else
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eval "${option}=\"${value}\""
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fi
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fi
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done
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elif [ "${config}" = "wancheck" ]
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then
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unset adb_wandev 2>/dev/null
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elif [ "${config}" = "ntpcheck" ]
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then
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unset adb_ntpsrv 2>/dev/null
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elif [ "${config}" = "shalla" ]
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then
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unset adb_cat_shalla 2>/dev/null
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fi
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}
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# load adblock config and start parsing functions
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#
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config_load adblock
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config_foreach parse_config service
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config_foreach parse_config source
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# set temp variables and counter
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#
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adb_tmpfile="$(mktemp -tu 2>/dev/null)"
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adb_tmpdir="$(mktemp -p /tmp -d 2>/dev/null)"
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# set adblock source ruleset definitions
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#
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rset_start="sed -r 's/[[:space:]]|[\[!#/:;_].*|[0-9\.]*localhost//g; s/[\^#/:;_\.\t ]*$//g'"
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rset_end="sed '/^[#/:;_\s]*$/d'"
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rset_default="${rset_start} | ${rset_end}"
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rset_yoyo="${rset_start} | sed 's/,/\n/g' | ${rset_end}"
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rset_shalla="${rset_start} | sed 's/\([0-9]\{1,3\}\.\)\{3\}[0-9]\{1,3\}$//g' | ${rset_end}"
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rset_spam404="${rset_start} | sed 's/^\|\|//g' | ${rset_end}"
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rset_winhelp="${rset_start} | sed 's/\([0-9]\{1,3\}\.\)\{3\}[0-1]\{1,1\}//g' | ${rset_end}"
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# set adblock/dnsmasq destination file and format
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#
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adb_dnsfile="/tmp/dnsmasq.d/adlist.conf"
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adb_dnsformat="sed 's/^/address=\//;s/$/\/'${adb_ip}'/'"
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}
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#############################################
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# f_envcheck: check environment prerequisites
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#
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f_envcheck()
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{
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# check required config variables
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#
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adb_varlist="adb_ip adb_dev adb_if adb_domain adb_minspace adb_maxloop adb_maxtime adb_blacklist adb_whitelist"
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for var in ${adb_varlist}
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do
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if [ -z "$(eval printf \"\$"${var}"\")" ]
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then
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rc=525
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f_log "missing adblock config option (${var})" "${rc}"
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f_deltemp
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fi
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done
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# check main uhttpd configuration
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#
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check_uhttpd="$(uci get uhttpd.main.listen_http 2>/dev/null | grep -Fo "0.0.0.0")"
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if [ -n "${check_uhttpd}" ]
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then
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rc=530
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lan_ip="$(uci get network.lan.ipaddr 2>/dev/null)"
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f_log "main uhttpd instance listens to all network interfaces, please bind uhttpd to LAN only (${lan_ip})" "${rc}"
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f_deltemp
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fi
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# check adblock network device configuration
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#
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if [ ! -d "/sys/class/net/${adb_dev}" ]
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then
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rc=535
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f_log "invalid adblock network device input (${adb_dev})" "${rc}"
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f_deltemp
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fi
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# check adblock network interface configuration
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#
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check_if="$(printf "${adb_if}" | sed -n '/[^._0-9A-Za-z]/p')"
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banned_if="$(printf "${adb_if}" | sed -n '/.*lan.*\|.*wan.*\|.*switch.*\|main\|globals\|loopback\|px5g/p')"
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if [ -n "${check_if}" ] || [ -n "${banned_if}" ]
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then
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rc=540
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f_log "invalid adblock network interface input (${adb_if})" "${rc}"
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f_deltemp
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fi
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# check adblock ip address configuration
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#
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check_ip="$(printf "${adb_ip}" | sed -n '/\([0-9]\{1,3\}\.\)\{3\}[0-9]\{1,3\}/p')"
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if [ -z "${check_ip}" ]
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then
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rc=545
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f_log "invalid adblock ip address input (${adb_ip})" "${rc}"
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f_deltemp
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fi
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# check adblock blacklist/whitelist configuration
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#
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if [ ! -r "${adb_blacklist}" ]
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then
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rc=550
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f_log "adblock blacklist not found" "${rc}"
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f_deltemp
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elif [ ! -r "${adb_whitelist}" ]
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then
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rc=555
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f_log "adblock whitelist not found" "${rc}"
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f_deltemp
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fi
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# check adblock temp directory
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#
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if [ -n "${adb_tmpdir}" ] && [ -d "${adb_tmpdir}" ]
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then
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f_space "${adb_tmpdir}"
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tmp_ok="true"
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else
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rc=560
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tmp_ok="false"
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f_log "temp directory not found" "${rc}"
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f_deltemp
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fi
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# check curl package dependency
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#
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check="$(printf "${pkg_list}" | grep "^curl -")"
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if [ -z "${check}" ]
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then
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rc=565
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f_log "curl package not found" "${rc}"
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f_deltemp
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fi
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# check wget package dependency
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#
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check="$(printf "${pkg_list}" | grep "^wget -")"
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if [ -z "${check}" ]
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then
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rc=570
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f_log "wget package not found" "${rc}"
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f_deltemp
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fi
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# check ca-certificates package and set wget/curl parms accordingly
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#
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check="$(printf "${pkg_list}" | grep "^ca-certificates -")"
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if [ -z "${check}" ]
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then
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curl_parm="-q --insecure"
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wget_parm="--no-config --no-hsts --no-check-certificate"
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else
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curl_parm="-q"
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wget_parm="--no-config --no-hsts"
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fi
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# check total and swap memory
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#
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mem_total="$(cat /proc/meminfo | grep -F "MemTotal" | grep -o "[0-9]*")"
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mem_free="$(cat /proc/meminfo | grep -F "MemFree" | grep -o "[0-9]*")"
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swap_total="$(cat /proc/meminfo | grep -F "SwapTotal" | grep -o "[0-9]*")"
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if [ $((mem_total)) -le 64000 ] && [ $((swap_total)) -eq 0 ]
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then
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f_log "please consider adding an external swap device to supersize your /tmp directory (total: ${mem_total}, free: ${mem_free}, swap: ${mem_swap})"
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fi
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# check backup configuration
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#
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adb_backupdir="${adb_backupfile%/*}"
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if [ -n "${adb_backupdir}" ] && [ -d "${adb_backupdir}" ]
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then
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f_space "${adb_backupdir}"
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backup_ok="true"
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else
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backup_ok="false"
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f_log "backup/restore will be disabled"
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fi
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# check dns query log configuration
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#
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adb_querydir="${adb_queryfile%/*}"
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adb_querypid="/var/run/adb_query.pid"
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if [ -n "${adb_querydir}" ] && [ -d "${adb_querydir}" ]
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then
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# check find capabilities
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#
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check="$(find --help 2>&1 | grep -F "mtime")"
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if [ -z "${check}" ]
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then
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query_ok="false"
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f_log "busybox without 'find/mtime' support (min. r47362), dns query logging will be disabled"
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else
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f_space "${adb_querydir}"
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query_ok="true"
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query_name="${adb_queryfile##*/}"
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query_ip="${adb_ip//./\\.}"
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fi
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else
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query_ok="false"
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f_log "dns query logging will be disabled"
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if [ -s "${adb_querypid}" ]
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then
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kill -9 "$(cat "${adb_querypid}")" >/dev/null 2>&1
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f_log "remove old dns query log background process (pid: $(cat "${adb_querypid}" 2>/dev/null))"
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> "${adb_querypid}"
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fi
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fi
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# check debug log configuration
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#
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adb_logdir="${adb_logfile%/*}"
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if [ -n "${adb_logdir}" ] && [ -d "${adb_logdir}" ]
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then
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f_space "${adb_logdir}"
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log_ok="true"
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else
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log_ok="false"
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f_log "debug logging will be disabled"
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fi
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# check wan update configuration
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#
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if [ -n "${adb_wandev}" ]
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then
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f_wancheck "${adb_maxloop}"
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else
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wan_ok="false"
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f_log "wan update check will be disabled"
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fi
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# check ntp sync configuration
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#
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if [ -n "${adb_ntpsrv}" ]
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then
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f_ntpcheck "${adb_maxloop}"
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else
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ntp_ok="false"
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f_log "ntp time sync will be disabled"
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fi
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# check dynamic/volatile adblock network interface configuration
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#
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rc="$(ifstatus "${adb_if}" >/dev/null 2>&1; printf ${?})"
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if [ $((rc)) -ne 0 ]
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then
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json_init
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json_add_string name "${adb_if}"
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json_add_string ifname "${adb_dev}"
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json_add_string proto "static"
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json_add_array ipaddr
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json_add_string "" "${adb_ip}"
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json_close_array
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json_close_object
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ubus call network add_dynamic "$(json_dump)"
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rc=${?}
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if [ $((rc)) -eq 0 ]
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then
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f_log "created new dynamic/volatile network interface (${adb_if}, ${adb_ip})"
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else
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f_log "failed to initialize new dynamic/volatile network interface (${adb_if}, ${adb_ip})" "${rc}"
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f_remove
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fi
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fi
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# check dynamic/volatile adblock uhttpd instance configuration
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#
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rc="$(ps | grep "[u]httpd.*\-r ${adb_if}" >/dev/null 2>&1; printf ${?})"
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if [ $((rc)) -ne 0 ]
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then
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uhttpd -h "/www/adblock" -r "${adb_if}" -E "/adblock.html" -p "${adb_ip}:80" >/dev/null 2>&1
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rc=${?}
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if [ $((rc)) -eq 0 ]
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then
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f_log "created new dynamic/volatile uhttpd instance (${adb_if}, ${adb_ip})"
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else
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f_log "failed to initialize new dynamic/volatile uhttpd instance (${adb_if}, ${adb_ip})" "${rc}"
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f_remove
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fi
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fi
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# remove no longer used environment variables
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#
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env_list="$(set | grep -o "CONFIG_[A-Za-z0-9_]*")"
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for var in ${env_list}
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do
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unset "${var}" 2>/dev/null
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done
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unset env_list 2>/dev/null
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unset pkg_list 2>/dev/null
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}
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################################################
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# f_log: log messages to stdout, syslog, logfile
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#
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f_log()
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{
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local log_msg="${1}"
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local log_rc="${2}"
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local class="info "
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if [ -n "${log_msg}" ]
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then
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if [ $((log_rc)) -ne 0 ]
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then
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class="error"
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log_rc=", rc: ${log_rc}"
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log_msg="${log_msg}${log_rc}"
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fi
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/usr/bin/logger -s -t "adblock[${pid}] ${class}" "${log_msg}"
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if [ "${log_ok}" = "true" ] && [ "${ntp_ok}" = "true" ]
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then
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printf "%s\n" "$(/bin/date "+%d.%m.%Y %H:%M:%S") adblock[${pid}] ${class}: ${log_msg}" >> "${adb_logfile}"
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fi
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fi
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}
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################################################
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# f_space: check mount points/space requirements
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#
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f_space()
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{
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local mp="${1}"
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if [ -d "${mp}" ]
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then
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df "${mp}" 2>/dev/null |\
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tail -n1 |\
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while read filesystem overall used available scrap
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do
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av_space="${available}"
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if [ $((av_space)) -eq 0 ]
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then
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rc=575
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f_log "no space left on device/not mounted (${mp})" "${rc}"
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exit ${rc}
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elif [ $((av_space)) -lt $((adb_minspace)) ]
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then
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rc=580
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f_log "not enough space left on device (${mp})" "${rc}"
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exit ${rc}
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fi
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done
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rc=${?}
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if [ $((rc)) -eq 0 ]
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then
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space_ok="true"
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else
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space_ok="false"
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f_deltemp
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fi
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fi
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}
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####################################################
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# f_deltemp: delete temp files, directories and exit
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#
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f_deltemp()
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{
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if [ -f "${adb_tmpfile}" ]
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then
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rm -f "${adb_tmpfile}" >/dev/null 2>&1
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fi
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if [ -d "${adb_tmpdir}" ]
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then
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rm -rf "${adb_tmpdir}" >/dev/null 2>&1
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fi
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f_log "domain adblock processing finished (${adb_version}, ${openwrt_version}, $(/bin/date "+%d.%m.%Y %H:%M:%S"))"
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exit ${rc}
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}
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####################################################
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# f_remove: maintain and (re-)start domain query log
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#
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f_remove()
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{
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if [ "${query_ok}" = "true" ] && [ "${ntp_ok}" = "true" ]
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then
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query_date="$(date "+%Y%m%d")"
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if [ -s "${adb_querypid}" ] && [ ! -f "${adb_queryfile}.${query_date}" ]
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then
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kill -9 "$(cat "${adb_querypid}")" >/dev/null 2>&1
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|
find "${adb_backupdir}" -maxdepth 1 -type f -mtime +"${adb_queryhistory}" -name "${query_name}.*" -exec rm -f {} \; 2>/dev/null
|
|
f_log "remove old domain query log background process (pid: $(cat "${adb_querypid}")) and do logfile housekeeping"
|
|
> "${adb_querypid}"
|
|
fi
|
|
if [ ! -s "${adb_querypid}" ]
|
|
then
|
|
(logread -f 2>/dev/null & printf ${!} > "${adb_querypid}") | grep -Eo "(query\[A\].*)|([a-z0-9\.\-]* is ${query_ip}$)" >> "${adb_queryfile}.${query_date}" &
|
|
f_log "new domain query log background process started"
|
|
fi
|
|
fi
|
|
f_deltemp
|
|
}
|
|
|
|
################################################################
|
|
# f_restore: restore last adblocklist backup and restart dnsmasq
|
|
#
|
|
f_restore()
|
|
{
|
|
if [ "${backup_ok}" = "true" ] && [ -f "${adb_backupfile}" ]
|
|
then
|
|
cp -f "${adb_backupfile}" "${adb_dnsfile}" >/dev/null 2>&1
|
|
f_log "adblocklist backup restored"
|
|
else
|
|
> "${adb_dnsfile}"
|
|
f_log="empty adblocklist generated"
|
|
fi
|
|
/etc/init.d/dnsmasq restart >/dev/null 2>&1
|
|
f_remove
|
|
}
|
|
|
|
#######################################################
|
|
# f_wancheck: check for usable adblock update interface
|
|
#
|
|
f_wancheck()
|
|
{
|
|
local cnt=0
|
|
local cnt_max="${1}"
|
|
local dev
|
|
local dev_out
|
|
while [ $((cnt)) -le $((cnt_max)) ]
|
|
do
|
|
for dev in ${adb_wandev}
|
|
do
|
|
if [ -d "/sys/class/net/${dev}" ]
|
|
then
|
|
dev_out="$(cat /sys/class/net/${dev}/operstate 2>/dev/null)"
|
|
rc=${?}
|
|
if [ "${dev_out}" = "up" ]
|
|
then
|
|
wan_ok="true"
|
|
f_log "get wan/update interface (${dev}), after ${cnt} loops"
|
|
break 2
|
|
fi
|
|
fi
|
|
done
|
|
sleep 1
|
|
cnt=$((cnt + 1))
|
|
done
|
|
if [ -z "${wan_ok}" ]
|
|
then
|
|
rc=585
|
|
wan_ok="false"
|
|
f_log "no wan/update interface(s) found (${adb_wandev# })" "${rc}"
|
|
f_restore
|
|
fi
|
|
}
|
|
|
|
#####################################
|
|
# f_ntpcheck: check/get ntp time sync
|
|
#
|
|
f_ntpcheck()
|
|
{
|
|
local cnt=0
|
|
local cnt_max="${1}"
|
|
local ntp_pool
|
|
for srv in ${adb_ntpsrv}
|
|
do
|
|
ntp_pool="${ntp_pool} -p ${srv}"
|
|
done
|
|
while [ $((cnt)) -le $((cnt_max)) ]
|
|
do
|
|
/usr/sbin/ntpd -nq ${ntp_pool} >/dev/null 2>&1
|
|
rc=${?}
|
|
if [ $((rc)) -eq 0 ]
|
|
then
|
|
ntp_ok="true"
|
|
f_log "get ntp time sync (${adb_ntpsrv# }), after ${cnt} loops"
|
|
break
|
|
fi
|
|
sleep 1
|
|
cnt=$((cnt + 1))
|
|
done
|
|
if [ -z "${ntp_ok}" ]
|
|
then
|
|
rc=590
|
|
ntp_ok="false"
|
|
f_log "ntp time sync failed (${adb_ntpsrv# })" "${rc}"
|
|
f_restore
|
|
fi
|
|
}
|
|
|
|
####################################################################
|
|
# f_dnscheck: dnsmasq health check with newly generated adblock list
|
|
#
|
|
f_dnscheck()
|
|
{
|
|
local dns_status
|
|
dns_status="$(logread -l 20 -e "dnsmasq" -e "FAILED to start up")"
|
|
rc=${?}
|
|
if [ -z "${dns_status}" ]
|
|
then
|
|
dns_status="$(nslookup "${adb_domain}" 2>/dev/null | grep -F "${adb_ip}")"
|
|
rc=${?}
|
|
if [ -z "${dns_status}" ]
|
|
then
|
|
if [ "${backup_ok}" = "true" ]
|
|
then
|
|
cp -f "${adb_dnsfile}" "${adb_backupfile}" >/dev/null 2>&1
|
|
f_log "new adblock list with ${adb_count} domains loaded, backup generated"
|
|
else
|
|
f_log "new adblock list with ${adb_count} domains loaded, no backup"
|
|
fi
|
|
else
|
|
f_log "nslookup probe failed" "${rc}"
|
|
f_restore
|
|
fi
|
|
else
|
|
f_log "dnsmasq probe failed" "${rc}"
|
|
f_restore
|
|
fi
|
|
}
|
|
|
|
##########################################################
|
|
# f_footer: write footer with a few statistics to dns file
|
|
#
|
|
f_footer()
|
|
{
|
|
local url
|
|
adb_count="$(wc -l < "${adb_dnsfile}")"
|
|
printf "%s\n" "####################################################" >> "${adb_dnsfile}"
|
|
printf "%s\n" "# last adblock list update: $(date +"%d.%m.%Y - %T")" >> "${adb_dnsfile}"
|
|
printf "%s\n" "# ${0##*/} (${adb_version}) - ${adb_count} ad/abuse domains blocked" >> "${adb_dnsfile}"
|
|
printf "%s\n" "# domain blacklist sources:" >> "${adb_dnsfile}"
|
|
for src in ${adb_sources}
|
|
do
|
|
url="${src//\&ruleset=*/}"
|
|
printf "%s\n" "# ${url}" >> "${adb_dnsfile}"
|
|
done
|
|
printf "%s\n" "#####" >> "${adb_dnsfile}"
|
|
printf "%s\n" "# ${adb_whitelist}" >> "${adb_dnsfile}"
|
|
printf "%s\n" "####################################################" >> "${adb_dnsfile}"
|
|
}
|