#!/bin/sh
# banIP - ban incoming and outgoing ip adresses/subnets via ipset
# 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"
ban_ver="0.0.7"
ban_sysver="unknown"
ban_enabled=0
ban_automatic="1"
ban_iface=""
ban_debug=0
ban_maxqueue=8
ban_fetchutil="uclient-fetch"
ban_ip="$(command -v ip)"
ban_ipt="$(command -v iptables)"
ban_ipt_save="$(command -v iptables-save)"
ban_ipt_restore="$(command -v iptables-restore)"
ban_ipt6="$(command -v ip6tables)"
ban_ipt6_save="$(command -v ip6tables-save)"
ban_ipt6_restore="$(command -v ip6tables-restore)"
ban_ipset="$(command -v ipset)"
ban_chain="banIP"
ban_action="${1:-"start"}"
ban_pidfile="/var/run/banip.pid"
ban_rtfile="/tmp/ban_runtime.json"
ban_setcnt=0
ban_cnt=0
ban_rc=0

# load environment
#
f_envload()
{
	local sys_call sys_desc sys_model

	# 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')"
		ban_sysver="${sys_model}, ${sys_desc}"
	fi

	# parse 'global' and 'extra' section by callback
	#
	config_cb()
	{
		local type="${1}"
		if [ "${type}" = "banip" ]
		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="ban_src ban_src_6 ban_src_rset ban_src_rset_6 ban_src_settype ban_src_ruletype ban_src_on ban_src_on_6 ban_src_cat"
		for opt in ${options}
		do
			config_get value "${section}" "${opt}"
			if [ -n "${value}" ]
			then
				eval "${opt}_${section}=\"${value}\""
				if [ "${opt}" = "ban_src" ]
				then
					eval "ban_sources=\"${ban_sources} ${section}\""
				elif [ "${opt}" = "ban_src_6" ]
				then
					eval "ban_sources=\"${ban_sources} ${section}_6\""
				fi
			fi
		done
	}

	# load config
	#
	config_load banip
	config_foreach parse_config source

	# create temp directory & files
	#
	f_temp

	# check status
	#
	if [ ${ban_enabled} -eq 0 ]
	then
		f_jsnup disabled
		f_ipset destroy
		f_rmtemp
		f_log "info" "banIP is currently disabled, please set ban_enabled to '1' to use this service"
		exit 0
	fi
}

# check environment
#
f_envcheck()
{
	local ssl_lib tmp

	# check fetch utility
	#
	case "${ban_fetchutil}" in
		uclient-fetch)
			if [ -f "/lib/libustream-ssl.so" ]
			then
				ban_fetchparm="${ban_fetchparm:-"--timeout=20 --no-check-certificate -O"}"
				ssl_lib="libustream-ssl"
			else
				ban_fetchparm="${ban_fetchparm:-"--timeout=20 -O"}"
			fi
		;;
		wget)
			ban_fetchparm="${ban_fetchparm:-"--no-cache --no-cookies --max-redirect=0 --timeout=20 --no-check-certificate -O"}"
			ssl_lib="built-in"
		;;
		wget-nossl)
			ban_fetchparm="${ban_fetchparm:-"--no-cache --no-cookies --max-redirect=0 --timeout=20 -O"}"
		;;
		busybox)
			ban_fetchparm="${ban_fetchparm:-"-O"}"
		;;
		curl)
			ban_fetchparm="${ban_fetchparm:-"--connect-timeout 20 --insecure -o"}"
			ssl_lib="built-in"
		;;
		aria2c)
			ban_fetchparm="${ban_fetchparm:-"--timeout=20 --allow-overwrite=true --auto-file-renaming=false --check-certificate=false -o"}"
			ssl_lib="built-in"
		;;
	esac
	ban_fetchutil="$(command -v "${ban_fetchutil}")"
	ban_fetchinfo="${ban_fetchutil:-"-"} (${ssl_lib:-"-"})"

	if [ ! -x "${ban_fetchutil}" ] || [ -z "${ban_fetchutil}" ] || [ -z "${ban_fetchparm}" ]
	then
		f_log "err" "download utility not found, please install 'uclient-fetch' with 'libustream-mbedtls' or the full 'wget' package"
	fi

	# get wan device and wan subnets
	#
	if [ "${ban_automatic}" = "1" ]
	then
		network_find_wan ban_iface
		if [ -z "${ban_iface}" ]
		then
			network_find_wan6 ban_iface
		fi
	fi

	for iface in ${ban_iface}
	do
		network_get_device tmp "${iface}"
		if [ -n "${tmp}" ]
		then
			ban_dev="${ban_dev} ${tmp}"
		else
			network_get_physdev tmp "${iface}"
			if [ -n "${tmp}" ]
			then
				ban_dev="${ban_dev} ${tmp}"
			fi
		fi
		network_get_subnets tmp "${iface}"
		if [ -n "${tmp}" ]
		then
			ban_subnets="${ban_subnets} ${tmp}"
		fi
		network_get_subnets6 tmp "${iface}"
		if [ -n "${tmp}" ]
		then
			ban_subnets6="${ban_subnets6} ${tmp}"
		fi
	done

	if [ -z "${ban_iface}" ] || [ -z "${ban_dev}" ]
	then
		f_log "err" "wan interface(s)/device(s) (${ban_iface:-"-"}/${ban_dev:-"-"}) not found, please please check your configuration"
	fi
	ban_dev_all="$(${ban_ip} link show | awk 'BEGIN{FS="[@: ]"}/^[0-9:]/{if(($3!="lo")&&($3!="br-lan")){print $3}}')"
	uci_set banip global ban_iface "${ban_iface}"
	uci_commit banip

	f_jsnup "running"
	f_log "info" "start banIP processing (${ban_action})"
}

# create temporary files and directories
#
f_temp()
{
	if [ -z "${ban_tmpdir}" ]
	then
		ban_tmpdir="$(mktemp -p /tmp -d)"
		ban_tmpload="$(mktemp -p ${ban_tmpdir} -tu)"
		ban_tmpfile="$(mktemp -p ${ban_tmpdir} -tu)"
	fi

	if [ ! -s "${ban_pidfile}" ]
	then
		printf '%s' "${$}" > "${ban_pidfile}"
	fi
}

# remove temporary files and directories
#
f_rmtemp()
{
	if [ -d "${ban_tmpdir}" ]
	then
		rm -rf "${ban_tmpdir}"
	fi
	> "${ban_pidfile}"
}

# iptables rules engine
#
f_iptrule()
{
	local rc timeout="-w 5" action="${1}" rule="${2}"

	if [ "${src_name##*_}" = "6" ]
	then
		rc="$("${ban_ipt6}" "${timeout}" -C ${rule} 2>/dev/null; printf '%u' ${?})"

		if ([ ${rc} -ne 0 ] && ([ "${action}" = "-A" ] || [ "${action}" = "-I" ])) \
		   || ([ ${rc} -eq 0 ] && [ "${action}" = "-D" ])
		then
			"${ban_ipt6}" "${timeout}" "${action}" ${rule}
		fi
	else
		rc="$("${ban_ipt}" "${timeout}" -C ${rule} 2>/dev/null; printf '%u' ${?})"

		if ([ ${rc} -ne 0 ] && ([ "${action}" = "-A" ] || [ "${action}" = "-I" ])) \
		   || ([ ${rc} -eq 0 ] && [ "${action}" = "-D" ])
		then
			"${ban_ipt}" "${timeout}" "${action}" ${rule}
		fi
	fi
}

# remove/add iptables rules
#
f_iptadd()
{
	local rm="${1}" dev

	for dev in ${ban_dev_all}
	do
		f_iptrule "-D" "${ban_chain} -i ${dev} -m conntrack --ctstate NEW -m set --match-set ${src_name} src -j ${target_src}"
		f_iptrule "-D" "${ban_chain} -o ${dev} -m conntrack --ctstate NEW -m set --match-set ${src_name} dst -j ${target_dst}"
	done

	if [ -z "${rm}" ] && [ ${cnt} -gt 0 ]
	then
		if [ "${src_ruletype}" != "dst" ]
		then
			if [ "${src_name##*_}" = "6" ]
			then
				# dummy, special IPv6 rules
				/bin/true
			else
				f_iptrule "-I" "${wan_input} -p udp --dport 67:68 --sport 67:68 -j RETURN"
			fi
			f_iptrule "-A" "${wan_input} -j ${ban_chain}"
			f_iptrule "-A" "${wan_forward} -j ${ban_chain}"
			for dev in ${ban_dev}
			do
				f_iptrule "${action:-"-A"}" "${ban_chain} -i ${dev} -m conntrack --ctstate NEW -m set --match-set ${src_name} src -j ${target_src}"
			done
		fi
		if [ "${src_ruletype}" != "src" ]
		then
			if [ "${src_name##*_}" = "6" ]
			then
				# dummy, special IPv6 rules
				/bin/true
			else
				f_iptrule "-I" "${lan_input} -p udp --dport 67:68 --sport 67:68 -j RETURN"
			fi
			f_iptrule "-A" "${lan_input} -j ${ban_chain}"
			f_iptrule "-A" "${lan_forward} -j ${ban_chain}"
			for dev in ${ban_dev}
			do
				f_iptrule "${action:-"-A"}" "${ban_chain} -o ${dev} -m conntrack --ctstate NEW -m set --match-set ${src_name} dst -j ${target_dst}"
			done
		fi
	else
		if [ -n "$("${ban_ipset}" -n list "${src_name}" 2>/dev/null)" ]
		then
			"${ban_ipset}" destroy "${src_name}"
		fi
	fi
}

# ipset/iptables actions
#
f_ipset()
{
	local rc cnt cnt_ip cnt_cidr size source action ruleset ruleset_6 rule timeout="-w 5" mode="${1}"

	if [ "${src_name%_6*}" = "whitelist" ]
	then
		target_src="ACCEPT"
		target_dst="ACCEPT"
		action="-I"
	fi

	case "${mode}" in
		initial)
			if [ -z "$("${ban_ipt}" "${timeout}" -nL "${ban_chain}" 2>/dev/null)" ]
			then
				"${ban_ipt}" "${timeout}" -N "${ban_chain}"
			fi

			if [ -z "$("${ban_ipt6}" "${timeout}" -nL "${ban_chain}" 2>/dev/null)" ]
			then
				"${ban_ipt6}" "${timeout}" -N "${ban_chain}"
			fi

			src_name="ruleset"
			ruleset="${ban_wan_input_chain:-"input_wan_rule"} ${ban_wan_forward_chain:-"forwarding_wan_rule"} ${ban_lan_input_chain:-"input_lan_rule"} ${ban_lan_forward_chain:-"forwarding_lan_rule"}"
			for rule in ${ruleset}
			do
				f_iptrule "-D" "${rule} -j ${ban_chain}"
			done

			src_name="ruleset_6"
			ruleset_6="${ban_wan_input_chain_6:-"input_wan_rule"} ${ban_wan_forward_chain_6:-"forwarding_wan_rule"} ${ban_lan_input_chain_6:-"input_lan_rule"} ${ban_lan_forward_chain_6:-"forwarding_lan_rule"}"
			for rule in ${ruleset_6}
			do
				f_iptrule "-D" "${rule} -j ${ban_chain}"
			done

			f_log "debug" "f_ipset ::: name: -, mode: ${mode:-"-"}, chain: ${ban_chain:-"-"}, ruleset: ${ruleset}, ruleset_6: ${ruleset_6}"
		;;
		create)
			cnt="$(wc -l 2>/dev/null < "${tmp_file}")"
			cnt_cidr="$(grep -F "/" "${tmp_file}" | wc -l)"
			cnt_ip="$(( cnt - cnt_cidr ))"
			size="$(( cnt / 4 ))"

			if [ ${cnt} -gt 0 ]
			then
				if [ -z "$("${ban_ipset}" -n list "${src_name}" 2>/dev/null)" ]
				then
					"${ban_ipset}" create "${src_name}" hash:"${src_settype}" hashsize "${size}" maxelem 262144 family "${src_setipv}" counters
				else
					"${ban_ipset}" flush "${src_name}"
				fi

				"${ban_ipset}" -! restore < "${tmp_file}"
				printf "%s\n" "1" > "${tmp_set}"
				printf "%s\n" "${cnt}" > "${tmp_cnt}"
			fi
			f_iptadd

			end_ts="$(date +%s)"
			f_log "debug" "f_ipset ::: name: ${src_name:-"-"}, mode: ${mode:-"-"}, settype: ${src_settype:-"-"}, setipv: "${src_setipv}", ruletype: ${src_ruletype:-"-"}, count(sum/ip/cidr): ${cnt:-0}/${cnt_ip:-0}/${cnt_cidr:-0}, time(s): $(( end_ts - start_ts ))"
		;;
		refresh)
			if [ -n "$("${ban_ipset}" -n list "${src_name}" 2>/dev/null)" ]
			then
				"${ban_ipset}" save "${src_name}" > "${tmp_file}"
				if [ -s "${tmp_file}" ]
				then
					cnt="$(( $(wc -l 2>/dev/null < "${tmp_file}") - 1 ))"
					cnt_cidr="$(grep -F "/" "${tmp_file}" | wc -l)"
					cnt_ip="$(( cnt - cnt_cidr ))"
					printf "%s\n" "1" > "${tmp_set}"
					printf "%s\n" "${cnt}" > "${tmp_cnt}"
				fi
				f_iptadd
			fi

			end_ts="$(date +%s)"
			f_log "debug" "f_ipset ::: name: ${src_name:-"-"}, mode: ${mode:-"-"}, count: ${cnt:-0}/${cnt_ip:-0}/${cnt_cidr:-0}, time(s): $(( end_ts - start_ts ))"
		;;
		flush)
			f_iptadd "remove"

			if [ -n "$("${ban_ipset}" -n list "${src_name}" 2>/dev/null)" ]
			then
				"${ban_ipset}" flush "${src_name}"
				"${ban_ipset}" destroy "${src_name}"
			fi

			f_log "debug" "f_ipset ::: name: ${src_name:-"-"}, mode: ${mode:-"-"}"
		;;
		destroy)
			if [ -n "$("${ban_ipt}" "${timeout}" -nL "${ban_chain}" 2>/dev/null)" ]
			then
				"${ban_ipt_save}" | grep -v -- "-j ${ban_chain}" | "${ban_ipt_restore}"
				"${ban_ipt}" "${timeout}" -F "${ban_chain}"
				"${ban_ipt}" "${timeout}" -X "${ban_chain}"
			fi

			if [ -n "$("${ban_ipt6}" "${timeout}" -nL "${ban_chain}" 2>/dev/null)" ]
			then
				"${ban_ipt6_save}" | grep -v -- "-j ${ban_chain}" | "${ban_ipt6_restore}"
				"${ban_ipt6}" "${timeout}" -F "${ban_chain}"
				"${ban_ipt6}" "${timeout}" -X "${ban_chain}"
			fi

			for source in ${ban_sources}
			do
				if [ -n "$("${ban_ipset}" -n list "${source}" 2>/dev/null)" ]
				then
					"${ban_ipset}" destroy "${source}"
				fi
			done

			f_log "debug" "f_ipset ::: name: ${src_name:-"-"}, mode: ${mode:-"-"}"
		;;
	esac
}

# write to syslog
#
f_log()
{
	local class="${1}" log_msg="${2}"

	if [ -n "${log_msg}" ] && ([ "${class}" != "debug" ] || [ ${ban_debug} -eq 1 ])
	then
		logger -p "${class}" -t "banIP-[${ban_ver}]" "${log_msg}"
		if [ "${class}" = "err" ]
		then
			f_jsnup error
			f_ipset destroy
			f_rmtemp
			logger -p "${class}" -t "banIP-[${ban_ver}]" "Please also check 'https://github.com/openwrt/packages/blob/master/net/banip/files/README.md'"
			exit 1
		fi
	fi
}

# main function for banIP processing
#
f_main()
{
	local start_ts end_ts ip tmp_raw tmp_cnt tmp_setcnt tmp_load tmp_file entry list suffix mem_total mem_free cnt=1
	local src_name src_on src_url src_rset src_setipv src_settype src_ruletype src_cat src_log src_addon
	local pid pid_list log_content="$(logread -e "dropbear")"
	local wan_input wan_forward lan_input lan_forward target_src target_dst

	mem_total="$(awk '/^MemTotal/ {print int($2/1000)}' "/proc/meminfo" 2>/dev/null)"
	mem_free="$(awk '/^MemFree/ {print int($2/1000)}' "/proc/meminfo" 2>/dev/null)"
	f_log "debug" "f_main  ::: fetch_util: ${ban_fetchinfo:-"-"}, fetch_parm: ${ban_fetchparm:-"-"}, interface(s): ${ban_iface:-"-"}, device(s): ${ban_dev:-"-"}, all_devices: ${ban_dev_all:-"-"}, mem_total: ${mem_total:-0}, mem_free: ${mem_free:-0}, max_queue: ${ban_maxqueue}"

	f_ipset initial

	# main loop
	#
	for src_name in ${ban_sources}
	do
		if [ "${src_name##*_}" = "6" ]
		then
			src_on="$(eval printf '%s' \"\${ban_src_on_6_${src_name%_6*}\}\")"
			src_url="$(eval printf '%s' \"\${ban_src_6_${src_name%_6*}\}\")"
			src_rset="$(eval printf '%s' \"\${ban_src_rset_6_${src_name%_6*}\}\")"
			src_setipv="inet6"
			wan_input="${ban_wan_input_chain_6:-"input_wan_rule"}"
			wan_forward="${ban_wan_forward_chain_6:-"forwarding_wan_rule"}"
			lan_input="${ban_lan_input_chain_6:-"input_lan_rule"}"
			lan_forward="${ban_lan_forward_chain_6:-"forwarding_lan_rule"}"
			target_src="${ban_target_src_6:-"DROP"}"
			target_dst="${ban_target_dst_6:-"REJECT"}"
		else
			src_on="$(eval printf '%s' \"\${ban_src_on_${src_name}\}\")"
			src_url="$(eval printf '%s' \"\${ban_src_${src_name}\}\")"
			src_rset="$(eval printf '%s' \"\${ban_src_rset_${src_name}\}\")"
			src_setipv="inet"
			wan_input="${ban_wan_input_chain:-"input_wan_rule"}"
			wan_forward="${ban_wan_forward_chain:-"forwarding_wan_rule"}"
			lan_input="${ban_lan_input_chain:-"input_lan_rule"}"
			lan_forward="${ban_lan_forward_chain:-"forwarding_lan_rule"}"
			target_src="${ban_target_src:-"DROP"}"
			target_dst="${ban_target_dst:-"REJECT"}"
		fi
		src_settype="$(eval printf '%s' \"\${ban_src_settype_${src_name%_6*}\}\")"
		src_ruletype="$(eval printf '%s' \"\${ban_src_ruletype_${src_name%_6*}\}\")"
		src_cat="$(eval printf '%s' \"\${ban_src_cat_${src_name%_6*}\}\")"
		src_addon=""
		tmp_load="${ban_tmpload}.${src_name}"
		tmp_file="${ban_tmpfile}.${src_name}"
		tmp_raw="${tmp_load}.raw"
		tmp_cnt="${tmp_file}.cnt"
		tmp_set="${tmp_file}.setcnt"

		# basic pre-checks
		#
		f_log "debug" "f_main  ::: name: ${src_name}, src_on: ${src_on:-"-"}"

		if [ "${src_on}" != "1" ] || [ -z "${src_url}" ] || [ -z "${src_rset}" ] ||\
			[ -z "${src_settype}" ] || [ -z "${src_ruletype}" ]
		then
			f_ipset flush
			continue
		elif [ "${ban_action}" = "refresh" ]
		then
			f_ipset refresh
			continue
		fi

		# download queue processing
		#
		(
			start_ts="$(date +%s)"
			if [ -f "${src_url}" ]
			then
				src_log="$(cat "${src_url}" 2>/dev/null > "${tmp_load}")"
				ban_rc=${?}

				case "${src_name}" in
					whitelist)
						src_addon="${ban_subnets}"
					;;
					whitelist_6)
						src_addon="${ban_subnets6}"
					;;
					blacklist)
						pid_list="$(printf "%s\n" "${log_content}" | grep -F "Exit before auth" | awk 'match($0,/(\[[0-9]+\])/){ORS=" ";print substr($0,RSTART,RLENGTH)}')"
						for pid in ${pid_list}
						do
							src_addon="${src_addon} $(printf "%s\n" "${log_content}" | grep -F "${pid}" | awk 'match($0,/([0-9]{1,3}\.){3}[0-9]{1,3}/){ORS=" ";print substr($0,RSTART,RLENGTH)}')"
						done
					;;
					blacklist_6)
						pid_list="$(printf "%s\n" "${log_content}" | grep -F "Exit before auth" | awk 'match($0,/(\[[0-9]+\])/){ORS=" ";print substr($0,RSTART,RLENGTH)}')"
						for pid in ${pid_list}
						do
							src_addon="${src_addon} $(printf "%s\n" "${log_content}" | grep -F "${pid}" | awk 'match($0,/([0-9a-fA-F]{0,4}:){1,7}[0-9a-fA-F]{0,4}/){ORS=" ";print substr($0,RSTART,RLENGTH)}')"
						done
					;;
				esac

				for ip in ${src_addon}
				do
					if [ -z "$(grep -F "${ip}" "${src_url}")" ]
					then
						printf '\n%s\n' "${ip}" >> "${tmp_load}"
						printf '\n%s\n' "${ip}" >> "${src_url}"
					fi
				done
			elif [ -n "${src_cat}" ]
			then
				if [ "${src_cat//[0-9]/}" != "${src_cat}" ]
				then
					for as in ${src_cat}
					do
						src_log="$("${ban_fetchutil}" ${ban_fetchparm} "${tmp_raw}" "${src_url}AS${as}" 2>&1)"
						ban_rc=${?}
						if [ ${ban_rc} -eq 0 ]
						then
							jsonfilter -i "${tmp_raw}" -e '@.data.prefixes.*.prefix' 2>/dev/null >> "${tmp_load}"
						else
							break
						fi
					done
				else
					for co in ${src_cat}
					do
						src_log="$("${ban_fetchutil}" ${ban_fetchparm} "${tmp_raw}" "${src_url}${co}&v4_format=prefix" 2>&1)"
						ban_rc=${?}
						if [ ${ban_rc} -eq 0 ]
						then
							if [ "${src_name##*_}" = "6" ]
							then
								jsonfilter -i "${tmp_raw}" -e '@.data.resources.ipv6.*' 2>/dev/null >> "${tmp_load}"
							else
								jsonfilter -i "${tmp_raw}" -e '@.data.resources.ipv4.*' 2>/dev/null >> "${tmp_load}"
							fi
						else
							break
						fi
					done
				fi
			else
				src_log="$("${ban_fetchutil}" ${ban_fetchparm} "${tmp_raw}" "${src_url}" 2>&1)"
				ban_rc=${?}
				if [ ${ban_rc} -eq 0 ]
				then
					zcat "${tmp_raw}" 2>/dev/null > "${tmp_load}"
					ban_rc=${?}
					if [ ${ban_rc} -ne 0 ]
					then
						mv -f "${tmp_raw}" "${tmp_load}"
						ban_rc=${?}
					fi
				fi
			fi
			if [ ${ban_rc} -eq 0 ]
			then
				awk "${src_rset}" "${tmp_load}" 2>/dev/null | sort -u > "${tmp_file}"
				ban_rc=${?}
				if [ ${ban_rc} -eq 0 ]
				then
					f_ipset create
				else
					f_ipset refresh
				fi
			else
				src_log="$(printf '%s' "${src_log}" | awk '{ORS=" ";print $0}')"
				f_log "debug" "f_main  ::: name: ${src_name}, url: ${src_url}, rc: ${ban_rc}, log: ${src_log:-"-"}"
				f_ipset refresh
			fi
		) &
		hold=$(( cnt % ban_maxqueue ))
		if [ ${hold} -eq 0 ]
		then
			wait
		fi
		cnt=$(( cnt + 1 ))
	done

	wait
	if [ ${ban_rc} -eq 0 ]
	then
		for cnt in $(cat ${ban_tmpfile}.*.setcnt 2>/dev/null)
		do
			ban_setcnt=$(( ban_setcnt + cnt ))
		done
		for cnt in $(cat ${ban_tmpfile}.*.cnt 2>/dev/null)
		do
			ban_cnt=$(( ban_cnt + cnt ))
		done
		f_log "info" "${ban_setcnt} IPSets with overall ${ban_cnt} IPs/Prefixes loaded successfully (${ban_sysver})"
	fi
	f_jsnup
	f_rmtemp
	exit ${ban_rc}
}

# update runtime information
#
f_jsnup()
{
	local rundate="$(/bin/date "+%d.%m.%Y %H:%M:%S")" status="${1:-"enabled"}"

	ban_cntinfo="${ban_setcnt} IPSets with overall ${ban_cnt} IPs/Prefixes"

	json_add_string "status" "${status}"
	json_add_string "version" "${ban_ver}"
	json_add_string "fetch_info" "${ban_fetchinfo:-"-"}"
	json_add_string "ipset_info" "${ban_cntinfo:-"-"}"
	json_add_string "last_run" "${rundate:-"-"}"
	json_add_string "system" "${ban_sysver}"
	json_dump > "${ban_rtfile}"

	f_log "debug" "f_jsnup ::: status: ${status}, setcnt: ${ban_setcnt}, cnt: ${ban_cnt}"
}

# source required system libraries
#
if [ -r "/lib/functions.sh" ] && [ -r "/lib/functions/network.sh" ] && [ -r "/usr/share/libubox/jshn.sh" ]
then
	. "/lib/functions.sh"
	. "/lib/functions/network.sh"
	. "/usr/share/libubox/jshn.sh"
else
	f_log "err" "system libraries not found"
fi

# initialize json runtime file
#
json_load_file "${ban_rtfile}" >/dev/null 2>&1
json_select data >/dev/null 2>&1
if [ ${?} -ne 0 ]
then
	> "${ban_rtfile}"
	json_init
	json_add_object "data"
fi

# handle different banIP actions
#
f_envload
case "${ban_action}" in
	stop)
		f_jsnup stopped
		f_ipset destroy
		f_rmtemp
	;;
	start|restart|reload|refresh)
		f_envcheck
		f_main
	;;
esac