#!/bin/sh /etc/rc.common
# Copyright 2017-2020 Stan Grishin (stangri@melmac.net)
# shellcheck disable=SC2039,SC1091,SC2018,SC2019
PKG_VERSION='dev-test'

# sysctl net.ipv4.conf.default.rp_filter=1
# sysctl net.ipv4.conf.all.rp_filter=1

# shellcheck disable=SC2034
START=94
# shellcheck disable=SC2034
USE_PROCD=1

if type extra_command 1>/dev/null 2>&1; then
	extra_command 'support' "Generates output required to troubleshoot routing issues
		Use '-d' option for more detailed output
		Use '-p' option to automatically upload data under VPR paste.ee account
			WARNING: while paste.ee uploads are unlisted, they are still publicly available
		List domain names after options to include their lookup in report"
	extra_command 'version' 'Show version information'
else
# shellcheck disable=SC2034
	EXTRA_COMMANDS='support version'
# shellcheck disable=SC2034
	EXTRA_HELP="	support	Generates output required to troubleshoot routing issues
		Use '-d' option for more detailed output
		Use '-p' option to automatically upload data under VPR paste.ee account
			WARNING: while paste.ee uploads are unlisted, they are still publicly available
		List domain names after options to include their lookup in report"
fi

readonly packageName='vpn-policy-routing'
readonly serviceName="$packageName $PKG_VERSION"
readonly PIDFile="/var/run/${packageName}.pid"
readonly jsonFile="/var/run/${packageName}.json"
readonly dnsmasqFile="/var/dnsmasq.d/${packageName}"
readonly sharedMemoryOutput="/dev/shm/$packageName-output"
readonly _OK_='\033[0;32m\xe2\x9c\x93\033[0m'
readonly _FAIL_='\033[0;31m\xe2\x9c\x97\033[0m'
readonly __OK__='\033[0;32m[\xe2\x9c\x93]\033[0m'
readonly __FAIL__='\033[0;31m[\xe2\x9c\x97]\033[0m'
readonly _ERROR_='\033[0;31mERROR\033[0m'
readonly _WARNING_='\033[0;33mWARNING\033[0m'

gatewaySummary=''; errorSummary=''; warningSummary='';
serviceEnabled=''; verbosity=''; strictMode=''; 
wanTableID=''; wanMark=''; fwMask=''; 
ipv6Enabled=''; srcIpset=''; destIpset=''; resolverIpset='';
wanIface4=''; wanIface6=''; ifaceMark=''; ifaceTableID='';
ifAll=''; ifSupported=''; ignoredIfaces=''; supportedIfaces=''; icmpIface='';
wanGW4=''; wanGW6=''; bootTimeout=''; insertOption='';
webuiChainColumn=''; webuiShowIgnore=''; dnsmasqIpsetSupported='';
procdReloadDelay='';
usedChainsList='PREROUTING'
ipsetSupported='true'
configLoaded='false'

version() { echo "$PKG_VERSION"; }
create_lock() { [ -e "$PIDFile" ] && return 1; touch "$PIDFile"; }
remove_lock() { [ -e "$PIDFile" ] && rm -f "$PIDFile"; }
trap remove_lock EXIT
output_ok() { output 1 "$_OK_"; output 2 "$__OK__\\n"; }
output_okn() { output 1 "$_OK_\\n"; output 2 "$__OK__\\n"; }
output_fail() { s=1; output 1 "$_FAIL_"; output 2 "$__FAIL__\\n"; }
output_failn() { output 1 "$_FAIL_\\n"; output 2 "$__FAIL__\\n"; }
str_replace() { printf "%b" "$1" | sed -e "s/$(printf "%b" "$2")/$(printf "%b" "$3")/g"; }
str_replace() { echo "${1//$2/$3}"; }
str_contains() { [ -n "$2" ] && [ "${1//$2}" != "$1" ]; }
str_contains_word() { echo "$1" | grep -q -w "$2"; }
str_to_lower() { echo "$1" | tr 'A-Z' 'a-z'; }
str_extras_to_underscore() { echo "$1" | tr '[\. ~`!@#$%^&*()\+/,<>?//;:]' '_'; }
str_extras_to_space() { echo "$1" | tr ';{}' ' '; }

output() {
# Can take a single parameter (text) to be output at any verbosity
# Or target verbosity level and text to be output at specifc verbosity
	local msg memmsg logmsg
	if [ $# -ne 1 ]; then
		if [ $((verbosity & $1)) -gt 0 ] || [ "$verbosity" = "$1" ]; then shift; else return 0; fi
	fi
	[ -t 1 ] && printf "%b" "$1"
	msg="${1//$serviceName /service }";
	if [ "$(printf "%b" "$msg" | wc -l)" -gt 0 ]; then
		[ -s "$sharedMemoryOutput" ] && memmsg="$(cat "$sharedMemoryOutput")"
		logmsg="$(printf "%b" "${memmsg}${msg}" | sed 's/\x1b\[[0-9;]*m//g')"
		logger -t "${packageName:-service} [$$]" "$(printf "%b" "$logmsg")"
		rm -f "$sharedMemoryOutput"
	else
		printf "%b" "$msg" >> "$sharedMemoryOutput"
	fi
}
is_present() { command -v "$1" >/dev/null 2>&1; }
is_installed() { [ -s "/usr/lib/opkg/info/${1}.control" ]; }
is_variant_installed() { [ "$(echo /usr/lib/opkg/info/"${1}"*.control)" != "/usr/lib/opkg/info/${1}*.control" ]; }

build_ifAll() { ifAll="${ifAll}${1} "; }
build_ifSupported() { is_supported_interface "$1" && ifSupported="${ifSupported}${1} "; }
vpr_find_iface() {
	local iface i param="$2"
	[ "$param" = 'wan6' ] || param='wan'
	"network_find_${param}" iface
	is_tunnel "$iface" && unset iface
	if [ -z "$iface" ]; then
		for i in $ifAll; do
			if "is_${param}" "$i"; then break; else unset i; fi
		done
	fi
	eval "$1"='${iface:-$i}'
}
vpr_get_gateway() {
	local iface="$2" dev="$3" gw
	network_get_gateway gw "$iface"
	if [ -z "$gw" ] || [ "$gw" = '0.0.0.0' ]; then
		gw="$(ip -4 a list dev "$dev" 2>/dev/null | grep inet | awk '{print $2}' | awk -F "/" '{print $1}')"
	fi
	eval "$1"='$gw'
}
vpr_get_gateway6() {
	local iface="$2" dev="$3" gw
	network_get_gateway6 gw "$iface"
	if [ -z "$gw" ] || [ "$gw" = '::/0' ] || [ "$gw" = '::0/0' ] || [ "$gw" = '::' ]; then
		gw="$(ip -6 a list dev "$dev" 2>/dev/null | grep inet6 | awk '{print $2}')"
	fi
	eval "$1"='$gw'
}
is_l2tp() { local proto; proto=$(uci -q get network."$1".proto); [ "${proto:0:4}" = "l2tp" ]; }
is_oc() { local proto; proto=$(uci -q get network."$1".proto); [ "${proto:0:11}" = "openconnect" ]; }
is_ovpn() { local dev; dev=$(uci -q get network."$1".ifname); [ "${dev:0:3}" = "tun" ] || [ "${dev:0:3}" = "tap" ] || [ -f "/sys/devices/virtual/net/${dev}/tun_flags" ]; }
is_pptp() { local proto; proto=$(uci -q get network."$1".proto); [ "${proto:0:4}" = "pptp" ]; }
is_tor() { [ "$(str_to_lower "$1")" = "tor" ]; }
is_tor_running() { 
	local ret=0
	if [ -s "/etc/tor/torrc" ]; then
		json_load "$(ubus call service list "{ 'name': 'tor' }")"
		json_select 'tor'; json_select 'instances'; json_select 'instance1';
		json_get_var ret 'running'; json_cleanup
	fi
	if [ "$ret" = "0" ]; then return 1; else return 0; fi
}
is_wg() { local proto; proto=$(uci -q get network."$1".proto); [ "${proto:0:9}" = "wireguard" ]; }
is_tunnel() { is_l2tp "$1" || is_oc "$1" || is_ovpn "$1" || is_pptp "$1" || is_tor "$1" || is_wg "$1"; }
is_wan() { [ "$1" = "$wanIface4" ] || { [ "${1##wan}" != "$1" ] && [ "${1##wan6}" = "$1" ]; } || [ "${1%%wan}" != "$1" ]; }
is_wan6() { [ -n "$wanIface6" ] && [ "$1" = "$wanIface6" ] || [ "${1/#wan6}" != "$1" ] || [ "${1/%wan6}" != "$1" ]; }
is_ignored_interface() { str_contains_word "$ignoredIfaces" "$1"; }
is_supported_interface() { str_contains_word "$supportedIfaces" "$1" || { ! is_ignored_interface "$1" && { is_wan "$1" || is_wan6 "$1" || is_tunnel "$1"; }; }; }
is_mac_address() { expr "$1" : '[0-9A-F][0-9A-F]:[0-9A-F][0-9A-F]:[0-9A-F][0-9A-F]:[0-9A-F][0-9A-F]:[0-9A-F][0-9A-F]:[0-9A-F][0-9A-F]$' >/dev/null; }
is_ipv4() { expr "$1" : '[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*$' >/dev/null; }
is_ipv6() { ! is_mac_address "$1" && str_contains "$1" ":"; }
is_family_mismatch() { ( is_netmask "${1//!}" && is_ipv6 "${2//!}" ) || ( is_ipv6 "${1//!}" && is_netmask "${2//!}" ); }
is_ipv6_link_local() { [ "${1:0:4}" = "fe80" ]; }
is_ipv6_unique_local() { [ "${1:0:2}" = "fc" ] || [ "${1:0:2}" = "fd" ]; }
is_ipv6_global() { [ "${1:0:4}" = "2001" ]; }
# is_ipv6_global() { is_ipv6 "$1" && ! is_ipv6_link_local "$1" && ! is_ipv6_link_local "$1"; }
is_netmask() { local ip="${1%/*}"; [ "$ip" != "$1" ] && is_ipv4 "$ip"; }
is_domain() { str_contains "$1" '[a-zA-Z]'; }
is_phys_dev() { [ "${1:0:1}" = "@" ] && ip l show | grep -E -q "^\\d+\\W+${1:1}"; }
is_turris() { /bin/ubus -S call system board | /bin/grep 'Turris' | /bin/grep -q '15.05'; }
is_chaos_calmer() { ubus -S call system board | grep -q 'Chaos Calmer'; }
dnsmasq_kill() { killall -q -HUP dnsmasq; }
dnsmasq_restart() { output 3 'Restarting DNSMASQ '; if /etc/init.d/dnsmasq restart >/dev/null 2>&1; then output_okn; else output_failn; fi; }
is_default_dev() { [ "$1" = "$(ip -4 r | grep -m1 'dev' | grep -Eso 'dev [^ ]*' | awk '{print $2}')" ]; }
is_supported_iface_dev() {
	for n in $ifSupported; do 
		if [ "$1" = "$(uci -q get "network.${n}.ifname" || echo "$n")" ] || \
			[ "$1" = "$(uci -q get "network.${n}.proto")-${n}" ] ; then return 0; fi
	done
	return 1
}
is_supported_protocol () { grep -o '^[^#]*' /etc/protocols | grep -w -v '0' | grep . | awk '{print $1}' | grep -q "$1"; }
append_chains_targets() {
	local chain iface name
	config_get name "$1" 'name' 'blank'
	config_get chain "$1" 'chain' 'PREROUTING'
	config_get iface "$1" 'interface'
	if ! str_contains_word "$usedChainsList" "$chain"; then
		usedChainsList="$usedChainsList $chain"
		if [ "$chain" != 'PREROUTING' ] && [ "$webuiChainColumn" != '1' ]; then
			warningSummary="${warningSummary}$_WARNING_: Chain '$chain' is used by a policy '$name', but a WebUI setting to show chains column (webui_chain_column) is disabled!\\n"
		fi
	fi
	if [ "$iface" = 'ignore' ] && ! str_contains_word "$supportedIfaces" 'ignore'; then
		supportedIfaces="$supportedIfaces ignore"
		if [ "$webuiShowIgnore" != '1' ]; then
			warningSummary="${warningSummary}$_WARNING_: The 'ignore' target is used by a policy '$name', but a WebUI setting to show 'ignore' target (webui_show_ignore_target) is disabled!\\n"
		fi
	fi
}

load_package_config() {
	[ "$configLoaded" = 'false' ] || return 0

	config_load "$packageName"
	config_get_bool serviceEnabled      'config' 'enabled' 0
	config_get_bool strictMode          'config' 'strict_enforcement' 1
	config_get_bool ipv6Enabled         'config' 'ipv6_enabled' 0
	config_get_bool srcIpset            'config' 'src_ipset' 0
	config_get_bool destIpset           'config' 'dest_ipset' 0
	config_get resolverIpset            'config' 'resolver_ipset' 'dnsmasq.ipset'
	config_get verbosity                'config' 'verbosity' '2'
	config_get wanTableID               'config' 'wan_tid' '201'
	config_get wanMark                  'config' 'wan_mark' '0x010000'
	config_get fwMask                   'config' 'fw_mask' '0xff0000'
	config_get icmpIface                'config' 'icmp_interface'
	config_get ignoredIfaces            'config' 'ignored_interface'
	config_get supportedIfaces          'config' 'supported_interface'
	config_get bootTimeout              'config' 'boot_timeout' '30'
	config_get insertOption             'config' 'iptables_rule_option' 'append'
	config_get procdReloadDelay         'config' 'procd_reload_delay' '0'
	config_get_bool webuiChainColumn    'config' 'webui_chain_column' '0'
	config_get_bool webuiShowIgnore     'config' 'webui_show_ignore_target' '0'
	config_foreach append_chains_targets 'policy'

	if [ -z "${verbosity##*[!0-9]*}" ] || [ "$verbosity" -lt 0 ] || [ "$verbosity" -gt 2 ]; then
		verbosity=2
	fi

	. /lib/functions/network.sh
	. /usr/share/libubox/jshn.sh
	mkdir -p "${PIDFile%/*}"
	mkdir -p "${jsonFile%/*}"
	mkdir -p "${dnsmasqFile%/*}"

	if [ -n "$icmpIface" ] && ! str_contains_word "$usedChainsList" 'OUTPUT'; then
		usedChainsList="$usedChainsList OUTPUT"
	fi

	case $insertOption in
		insert|-i|-I) insertOption='-I';;
		append|-a|-A|*) insertOption='-A';;
	esac

	[ "$resolverIpset" = 'dnsmasq.ipset' ] && dnsmasqIpsetSupported='true'
	if dnsmasq -v 2>/dev/null | grep -q 'no-ipset' || ! dnsmasq -v 2>/dev/null | grep -q -w 'ipset'; then
		unset dnsmasqIpsetSupported
		if [ -n "$dnsmasqIpsetSupported" ]; then
			errorSummary="${errorSummary}${_ERROR_}: Resolver ipset support (dnsmasq.ipset) is enabled in $packageName, but DNSMASQ ipsets are not supported on this system!\\n"
		fi
	fi
	if ! ipset help hash:net >/dev/null 2>&1; then
		unset ipsetSupported
		if [ -n "$dnsmasqIpsetSupported" ]; then
			errorSummary="${errorSummary}${_ERROR_}: DNSMASQ ipsets are supported, but ipset is either not installed or installed ipset does not support 'hash:net' type!\\n"
			unset dnsmasqIpsetSupported
		fi
		if [ "$destIpset" -ne 0 ]; then
			errorSummary="${errorSummary}${_ERROR_}: Destination ipset support is enabled in $packageName, but ipset is either not installed or installed ipset does not support 'hash:net' type!\\n"
			destIpset=0
		fi
		if [ "$srcIpset" -ne 0 ]; then
			errorSummary="${errorSummary}${_ERROR_}: Source ipset support is enabled in $packageName, but ipset is either not installed or installed ipset does not support 'hash:net' type!\\n"
			srcIpset=0
		fi
	fi
	if ! ipset help hash:mac >/dev/null 2>&1; then
		if [ "$srcIpset" -ne 0 ]; then
			errorSummary="${errorSummary}${_ERROR_}: Source ipset support is enabled in $packageName, but ipset is either not installed or installed ipset does not support 'hash:mac' type!\\n"
			srcIpset=0
		fi
	fi

	configLoaded='true'
}

is_enabled() {
	load_package_config
	if [ "$serviceEnabled" -eq 0 ]; then
		if [ "$1" = 'on_start' ]; then
			errorSummary="${errorSummary}${_ERROR_}: ${packageName} is currently disabled.\\n"
			errorSummary="${errorSummary}Enable ${packageName} from WebUI or run the following commands:\\n"
			errorSummary="${errorSummary}uci set $packageName.config.enabled='1'; uci commit $packageName;\\n"
		fi
		return 1
	fi
}

load_network() {
	if [ -z "$ifAll" ]; then
		config_load 'network'
		config_foreach build_ifAll 'interface'
	fi
	vpr_find_iface wanIface4 'wan'
	[ "$ipv6Enabled" -ne 0 ] && vpr_find_iface wanIface6 'wan6'
	[ -n "$wanIface4" ] && network_get_gateway wanGW4 "$wanIface4"
	[ -n "$wanIface6" ] && network_get_gateway6 wanGW6 "$wanIface6"
	wanGW="${wanGW4:-$wanGW6}"
	unset ifSupported
	config_load 'network'
	config_foreach build_ifSupported 'interface'
}

is_wan_up() {
	local sleepCount=1
	load_network
	while [ -z "$wanGW" ] ; do
		load_network
		if [ $((sleepCount)) -gt $((bootTimeout)) ] || [ -n "$wanGW" ]; then break; fi
		output "$serviceName waiting for wan gateway...\\n"
		sleep 1
		network_flush_cache
		sleepCount=$((sleepCount+1))
	done
	if [ -n "$wanGW" ]; then
		return 0
	else
		errorSummary="${errorSummary}${_ERROR_}: ${serviceName} failed to discover WAN gateway!\\n"
		return 1
	fi
}

ipt_cleanup() {
	local i
	for i in PREROUTING FORWARD INPUT OUTPUT; do
		while iptables -t mangle -D $i -m mark --mark 0x0/0xff0000 -j VPR_${i} >/dev/null 2>&1; do : ; done
	done
	for i in PREROUTING FORWARD INPUT OUTPUT; do
		while iptables -t mangle -D $i -j VPR_${i} >/dev/null 2>&1; do : ; done
	done
}

# shellcheck disable=SC2086
ipt() {
	local d failFlagIpv4=1 failFlagIpv6=1
	for d in "${*//-A/-D}" "${*//-I/-D}" "${*//-N/-F}" "${*//-N/-X}"; do 
		[ "$d" != "$*" ] && { iptables $d >/dev/null 2>&1; ip6tables $d >/dev/null 2>&1; }
	done

	d="$*"; iptables $d >/dev/null 2>&1 && failFlagIpv4=0;
	if [ "$ipv6Enabled" -gt 0 ]; then ip6tables $d >/dev/null 2>&1 && failFlagIpv6=0; fi

	[ "$failFlagIpv4" -eq 0 ] || [ "$failFlagIpv6" -eq 0 ]
}

# shellcheck disable=SC2086
ips() {
	local command="$1" ipset="${2//-/_}" param="$3" comment="$4" appendix failFlag=0
	if str_contains "$ipset" '_ip'; then
		ipset="${ipset//_ip}"; appendix='_ip';
	elif str_contains "$ipset" '_mac'; then
		ipset="${ipset//_mac}"; appendix='_mac';
	fi

	case "$command" in
		add_dnsmasq)
			[ "$resolverIpset" = "dnsmasq.ipset" ] || return 1
			if [ -z "$dnsmasqIpsetSupported" ]; then
				warningSummary="${warningSummary}${_WARNING_}: The 'resolver_ipset' is set to 'dnsmasq.ipset', but DNSMASQ ipsets are not supported on this system!\\n"
				failFlag=1
			elif [ "$ipv6Enabled" -ne 0 ]; then
				echo "ipset=/${param}/${ipset},${ipset}6 # $comment" >> "$dnsmasqFile" || failFlag=1
			else
				echo "ipset=/${param}/${ipset} # $comment" >> "$dnsmasqFile" || failFlag=1
			fi
			;;
		add)
			if [ -z "$appendix" ] && [ "$destIpset" -eq 0 ]; then return 1; fi
			if [ -n "$appendix" ] && [ "$srcIpset" -eq 0 ]; then return 1; fi
			if [ "$ipv6Enabled" -ne 0 ] && [ "$appendix" != "_mac" ]; then
				ipset -q -! $command "${ipset}6${appendix}" $param comment "$comment" || failFlag=1
			fi
			ipset -q -! $command "${ipset}${appendix}" $param comment "$comment" || failFlag=1
			;;
		create)
			if [ "$ipv6Enabled" -ne 0 ] && [ "$appendix" != "_mac" ]; then
				ipset -q -! "$command" "${ipset}6${appendix}" $param family inet6 || failFlag=1
			fi
			ipset -q -! "$command" "${ipset}${appendix}" $param || failFlag=1
			;;
		destroy|flush)
			ipset -q -! "$command" "${ipset}6${appendix}" 2>/dev/null || failFlag=1
			ipset -q -! "$command" "${ipset}${appendix}" 2>/dev/null || failFlag=1
			return 0
			;;
	esac
	return $failFlag
}

insert_tor_policy() {
	local comment="$1" iface="$2" laddr="$3" lport="$4" raddr="$5" rport="$6" proto chain
	proto="$(str_to_lower "$7")"
	chain="${8:-PREROUTING}"
	if [ -n "${laddr}${lport}${rport}" ]; then
		processPolicyWarning="${processPolicyWarning}${_WARNING_}: Please unset 'src_addr', 'src_port' and 'dest_port' for policy '$comment'\\n"
	fi
	if [ -n "$proto" ] && [ "$proto" != "all" ]; then
		processPolicyWarning="${processPolicyWarning}${_WARNING_}: Please unset 'proto' or set 'proto' to 'all' for policy '$comment'\\n"
	fi
	if [ "$chain" != "PREROUTING" ]; then
		processPolicyWarning="${processPolicyWarning}${_WARNING_}: Please unset 'chain' or set 'chain' to 'PREROUTING' for policy '$comment'\\n"
	fi
	ips 'add' "${iface}" "$raddr" "${comment}: $raddr" || processPolicyError="${processPolicyError}${_ERROR_}: ipset 'add' $iface $raddr\\n"
	return 0
}

insert_policy() {
	local comment="$1" iface="$2" laddr="$3" lport="$4" raddr="$5" rport="$6" proto chain
	local mark param i valueNeg value dest ipInsertOption="-A"
	proto="$(str_to_lower "$7")"
	chain="${8:-PREROUTING}"
	mark=$(eval echo "\$mark_${iface//-/_}")
	if [ "$ipv6Enabled" -eq 0 ] && ( is_ipv6 "$laddr" || is_ipv6 "$raddr" ); then
		processPolicyError="${processPolicyError}${_ERROR_}: Skipping IPv6 policy '$comment' as IPv6 support is disabled\\n"
		return 1
	fi

	if [ -n "$mark" ]; then
		dest="-g VPR_MARK${mark}"
	elif [ "$iface" = "ignore" ]; then
			dest="-j RETURN"
	else
		processPolicyError="${processPolicyError}${_ERROR_}: Unknown fw_mark for ${iface}\\n"
		return 0
	fi

	if [ -z "$proto" ]; then
		if [ -n "$lport" ] || [ -n "$rport" ]; then 
			proto='tcp udp'
		else
			proto='all'
		fi
	fi

	if is_family_mismatch "$laddr" "$raddr"; then 
		processPolicyError="${processPolicyError}${_ERROR_}: Mismatched IP family between '$laddr' and '$raddr' in policy '$comment'\\n"
		return 0
	fi

	for i in $proto; do
		if [ "$i" = 'all' ]; then
			param="-t mangle ${ipInsertOption} VPR_${chain} $dest"
		elif ! is_supported_protocol "$i"; then
			processPolicyError="${processPolicyError}${_ERROR_}: Unknown protocol '$i' in policy '$comment'\\n"
			return 0
		else
			param="-t mangle ${ipInsertOption} VPR_${chain} $dest -p $i"
		fi

		if [ -n "$laddr" ]; then
			if [ "${laddr:0:1}" = "!" ]; then
				valueNeg='!'; value="${laddr:1}"
			else
				unset valueNeg; value="$laddr";
			fi
			if is_phys_dev "$value"; then
				param="$param $valueNeg -m physdev --physdev-in ${value:1}"
			elif is_mac_address "$value"; then
				param="$param -m mac $valueNeg --mac-source $value"
			else
				param="$param $valueNeg -s $value"
			fi
		fi

		if [ -n "$lport" ]; then
			if [ "${lport:0:1}" = "!" ]; then
				valueNeg='!'; value="${lport:1}"
			else
				unset valueNeg; value="$lport";
			fi
			param="$param -m multiport $valueNeg --sport ${value//-/:}"
		fi

		if [ -n "$raddr" ]; then 
			if [ "${raddr:0:1}" = "!" ]; then
				valueNeg='!'; value="${raddr:1}"
			else
				unset valueNeg; value="$raddr";
			fi
			param="$param $valueNeg -d $value"
		fi

		if [ -n "$rport" ]; then
			if [ "${rport:0:1}" = "!" ]; then
				valueNeg='!'; value="${rport:1}"
			else
				unset valueNeg; value="$rport";
			fi
			param="$param -m multiport $valueNeg --dport ${value//-/:}"
		fi

		[ -n "$comment" ] && param="$param -m comment --comment $(str_extras_to_underscore "$comment")"
		ipt "$param" || processPolicyError="${processPolicyError}${_ERROR_}: iptables $param\\n"
	done
	return 0
}

r_process_policy(){
	local comment="$1" iface="$2" laddr="$3" lport="$4" raddr="$5" rport="$6" proto="$7" chain="$8" resolved_laddr resolved_raddr i ipsFailFlag
	if str_contains "$laddr" '[ ;\{\}]'; then
		for i in $(str_extras_to_space "$laddr"); do [ -n "$i" ] && r_process_policy "$comment" "$iface" "$i" "$lport" "$raddr" "$rport" "$proto" "$chain"; done
		return 0
	elif str_contains "$lport" '[ ;\{\}]'; then
		for i in $(str_extras_to_space "$lport"); do [ -n "$i" ] && r_process_policy "$comment" "$iface" "$laddr" "$i" "$raddr" "$rport" "$proto" "$chain"; done
		return 0
	elif str_contains "$raddr" '[ ;\{\}]'; then
		for i in $(str_extras_to_space "$raddr"); do [ -n "$i" ] && r_process_policy "$comment" "$iface" "$laddr" "$lport" "$i" "$rport" "$proto" "$chain"; done
		return 0
	elif str_contains "$rport" '[ ;\{\}]'; then
		for i in $(str_extras_to_space "$rport"); do [ -n "$i" ] && r_process_policy "$comment" "$iface" "$laddr" "$lport" "$raddr" "$i" "$proto" "$chain"; done
		return 0
	fi

	# start non-recursive processing 
	# process TOR, netmask, physical device and mac-address separately, so we don't send them to resolveip
	if is_tor "$iface"; then
		insert_tor_policy "$comment" "$iface" "$laddr" "$lport" "$raddr" "$rport" "$proto" "$chain"
	elif is_phys_dev "$laddr"; then
		insert_policy "$comment" "$iface" "$laddr" "$lport" "$raddr" "$rport" "$proto" "$chain"
	elif [ -n "$laddr" ] && [ -z "${lport}${raddr}${rport}" ] && [ "$chain" = 'PREROUTING' ]; then
		if is_mac_address "$laddr"; then
			if [ -n "$proto" ] && [ "$proto" != 'all' ] && [ "$srcIpset" -ne 0 ]; then
				processPolicyWarning="${processPolicyWarning}${_WARNING_}: Please unset 'proto' or set 'proto' to 'all' for policy: '$comment', mac-address: '$laddr'\\n"
			fi
			ips 'add' "${iface}_mac" "$laddr" "${comment}: $laddr" || ipsFailFlag=1
		else
			if [ -n "$proto" ] && [ "$proto" != "all" ] && [ "$srcIpset" -ne 0 ]; then
				processPolicyWarning="${processPolicyWarning}${_WARNING_}: Please unset 'proto' or set 'proto' to 'all' for policy: '$comment', source: '$laddr'\\n"
			fi
			ips 'add' "${iface}_ip" "$laddr" "${comment}: $laddr" || ipsFailFlag=1
		fi
	elif [ -n "$raddr" ] && [ -z "${laddr}${lport}${rport}" ] && [ "$chain" = 'PREROUTING' ]; then
		if [ -n "$proto" ] && [ "$proto" != 'all' ]; then
			processPolicyWarning="${processPolicyWarning}${_WARNING_}: Please unset 'proto' or set 'proto' to 'all' for policy: '$comment', destination: '$raddr'\\n"
		fi
		if is_domain "$raddr"; then
			ips 'add_dnsmasq' "${iface}" "$raddr" "${comment}" || ipsFailFlag=1
		else 
			ips 'add' "${iface}" "$raddr" "${comment}: $raddr" || ipsFailFlag=1
		fi
	else
		ipsFailFlag=1
	fi
	[ -n "$ipsFailFlag" ] || return 0;
	if is_mac_address "$laddr"; then
		insert_policy "$comment" "$iface" "$laddr" "$lport" "$raddr" "$rport" "$proto" "$chain"
	elif is_netmask "$laddr" || is_netmask "$raddr"; then
		insert_policy "$comment" "$iface" "$laddr" "$lport" "$raddr" "$rport" "$proto" "$chain"
	else
		[ -n "$laddr" ] && resolved_laddr="$(resolveip "$laddr")"
		[ -n "$raddr" ] && resolved_raddr="$(resolveip "$raddr")"
		if [ -n "$resolved_laddr" ] && [ "$resolved_laddr" != "$laddr" ]; then
			for i in $resolved_laddr; do [ -n "$i" ] && r_process_policy "$comment $laddr" "$iface" "$i" "$lport" "$raddr" "$rport" "$proto" "$chain"; done
		elif [ -n "$resolved_raddr" ] && [ "$resolved_raddr" != "$raddr" ]; then
				for i in $resolved_raddr; do [ -n "$i" ] && r_process_policy "$comment $raddr" "$iface" "$laddr" "$lport" "$i" "$rport" "$proto" "$chain"; done
		else
			insert_policy "$comment" "$iface" "$laddr" "$lport" "$raddr" "$rport" "$proto" "$chain"
		fi
	fi
}

process_policy(){
	local name comment iface laddr lport raddr rport param mark processPolicyError processPolicyWarning proto chain enabled
	config_get comment "$1" 'comment'
	config_get name    "$1" 'name' 'blank'
	config_get iface   "$1" 'interface'
	config_get laddr   "$1" 'src_addr'
	config_get lport   "$1" 'src_port'
	config_get raddr   "$1" 'dest_addr'
	config_get rport   "$1" 'dest_port'
	config_get proto   "$1" 'proto'
	config_get chain   "$1" 'chain' 'PREROUTING'
	config_get_bool enabled "$1" 'enabled' 1

	[ "$enabled" -gt 0 ] || return 0
	proto="$(str_to_lower "$proto")"
	[ "$proto" = 'auto' ] && unset proto

	comment="${comment:-$name}"
	output 2 "Routing '$comment' via $iface "

	if [ -z "$comment" ]; then
		errorSummary="${errorSummary}${_ERROR_}: Policy name is empty\\n"
		output_fail; return 1;
	fi
	if [ -z "${laddr}${lport}${raddr}${rport}" ]; then
		errorSummary="${errorSummary}${_ERROR_}: Policy '$comment' missing all IPs/ports\\n"
		output_fail; return 1;
	fi
	if [ -z "$iface" ]; then
		errorSummary="${errorSummary}${_ERROR_}: Policy '$comment' has no assigned interface\\n"
		output_fail; return 1;
	fi
	if ! is_supported_interface "$iface"; then
		errorSummary="${errorSummary}${_ERROR_}: Policy '$comment' has unknown interface: '${iface}'\\n"
		output_fail; return 1;
	fi

	lport="${lport//  / }"; lport="${lport// /,}"; lport="${lport//,\!/ !}"; 
	rport="${rport//  / }"; rport="${rport// /,}"; rport="${rport//,\!/ !}";
	r_process_policy "$comment" "$iface" "$laddr" "$lport" "$raddr" "$rport" "$proto" "$chain"
	if [ -n "$processPolicyWarning" ]; then
		warningSummary="${warningSummary}${processPolicyWarning}\\n"
	fi
	if [ -n "$processPolicyError" ]; then
		output_fail
		errorSummary="${errorSummary}${processPolicyError}\\n"
	else
		output_ok
	fi
}

table_destroy(){
	local tid="$1" iface="$2" mark="$3"
	if [ -n "$tid" ] && [ -n "$iface" ] && [ -n "$mark" ]; then
		ipt -t mangle -F "VPR_MARK${mark}"
		ipt -t mangle -X "VPR_MARK${mark}"
		ip -4 rule del fwmark "$mark" table "$tid" >/dev/null 2>&1
		ip -6 rule del fwmark "$mark" table "$tid" >/dev/null 2>&1
	 	ip -4 rule del table "$tid" >/dev/null 2>&1
		ip -6 rule del table "$tid" >/dev/null 2>&1
		ip -4 route flush table "$tid" >/dev/null 2>&1
		ip -6 route flush table "$tid" >/dev/null 2>&1
		ips 'flush' "${iface}"; ips 'destroy' "${iface}";
		ips 'flush' "${iface}_ip"; ips 'destroy' "${iface}_ip";
		ips 'flush' "${iface}_mac"; ips 'destroy' "${iface}_mac";
		ip -4 route flush cache
		ip -6 route flush cache
		sed -i "/$iface/d" /etc/iproute2/rt_tables
		return 0
	else
		return 1
	fi
}

# shellcheck disable=SC2086
table_create(){
	local tid="$1" mark="$2" iface="$3" gw4="$4" dev="$5" gw6="$6" dev6="$7" dscp s=0 i ipv4_error=0 ipv6_error=1

	if [ -z "$tid" ] || [ -z "$mark" ] || [ -z "$iface" ]; then
		return 1
	fi

	table_destroy "$tid" "$iface" "$mark"

	if [ -n "$gw4" ] || [ "$strictMode" -ne 0 ]; then
		echo "$tid" "$iface" >> /etc/iproute2/rt_tables
		if [ -z "$gw4" ]; then
			ip -4 route add unreachable default table "$tid" >/dev/null 2>&1 || ipv4_error=1
		else
			ip -4 route add default via "$gw4" dev "$dev" table "$tid" >/dev/null 2>&1 || ipv4_error=1
		fi
#		ip -4 route list table main | grep -v 'br-lan' | while read -r i; do
		ip -4 route list table main | while read -r i; do
			idev="$(echo "$i" | grep -Eso 'dev [^ ]*' | awk '{print $2}')"
			if ! is_supported_iface_dev "$idev"; then
				ip -4 route add $i table "$tid" >/dev/null 2>&1 || ipv4_error=1
			fi
		done
		ip -4 route flush cache || ipv4_error=1
		ip -4 rule add fwmark "${mark}/${fwMask}" table "$tid" || ipv4_error=1
		ipt -t mangle -N "VPR_MARK${mark}" || ipv4_error=1
		ipt -t mangle -A "VPR_MARK${mark}" -j MARK --set-xmark "${mark}/${fwMask}" || ipv4_error=1
		ipt -t mangle -A "VPR_MARK${mark}" -j RETURN || ipv4_error=1
	fi

	if [ "$ipv6Enabled" -ne 0 ]; then
		ipv6_error=0
		if { [ -n "$gw6" ] && [ "$gw6" != "::/0" ]; } || [ "$strictMode" -ne 0 ]; then
			if [ -z "$gw6" ] || [ "$gw6" = "::/0" ]; then
				ip -6 route add unreachable default table "$tid" || ipv6_error=1
			else
				ip -6 route list table main | grep " dev $dev6 " | while read -r i; do
					ip -6 route add $i table "$tid" >/dev/null 2>&1 || ipv6_error=1
				done
			fi
			ip -6 route flush cache || ipv6_error=1
			ip -6 rule add fwmark "${mark}/${fwMask}" table "$tid" || ipv6_error=1
		fi
	fi

	if [ $ipv4_error -eq 0 ] || [ $ipv6_error -eq 0 ]; then
		dscp="$(uci -q get "${packageName}".config."${iface}"_dscp)"
		if [ "${dscp:-0}" -ge 1 ] && [ "${dscp:-0}" -le 63 ]; then
			ipt -t mangle -I VPR_PREROUTING -m dscp --dscp "${dscp}" -g "VPR_MARK${mark}" || s=1
		fi
		if [ -n "$ipsetSupported" ] && { [ -n "$dnsmasqIpsetSupported" ] || [ "$destIpset" -ne 0 ]; }; then
			if ips 'create' "${iface}" 'hash:net comment' && ips 'flush' "${iface}"; then
				for i in $usedChainsList; do
					ipt -t mangle -I VPR_${i} -m set --match-set "${iface}" dst -g "VPR_MARK${mark}" || s=1
					if [ "$ipv6Enabled" -ne 0 ]; then ipt -t mangle -I VPR_${i} -m set --match-set "${iface}6" dst -g "VPR_MARK${mark}" || s=1; fi
				done
			else
				s=1
			fi
		fi
		if [ -n "$ipsetSupported" ] && [ "$srcIpset" -ne 0 ]; then
			if ips 'create' "${iface}_ip" 'hash:net comment' && ips 'flush' "${iface}_ip"; then
				ipt -t mangle -I VPR_PREROUTING -m set --match-set "${iface}_ip" src -g "VPR_MARK${mark}" || s=1
				if [ "$ipv6Enabled" -ne 0 ]; then ipt -t mangle -I VPR_PREROUTING -m set --match-set "${iface}6_ip" src -g "VPR_MARK${mark}" || s=1; fi
			else
				s=1
			fi
			if ips 'create' "${iface}_mac" 'hash:mac comment' && ips 'flush' "${iface}_mac"; then
				ipt -t mangle -I VPR_PREROUTING -m set --match-set "${iface}_mac" src -g "VPR_MARK${mark}" || s=1
			else
				s=1
			fi
		fi
		if [ "$iface" = "$icmpIface" ]; then
			ipt -t mangle -I VPR_OUTPUT -p icmp -g "VPR_MARK${mark}" || s=1
		fi
	else
		s=1
	fi

	return $s
}

process_interface(){
	local gw4 gw6 dev dev6 s=0 dscp iface="$1" action="$2" displayText

	is_supported_interface "$iface" || return 0
	is_wan6 "$iface" && return 0
	[ $((ifaceMark)) -gt $((fwMask)) ] && return 1

	network_get_device dev "$iface"
	[ -z "$dev" ] && config_get dev "$iface" 'ifname'
	if is_wan "$iface" && [ -n "$wanIface6" ]; then
		network_get_device dev6 "$wanIface6"
		[ -z "$dev6" ] && config_get dev6 "$wanIface6" 'ifname'
	fi
	[ -z "$dev6" ] && dev6="$dev"

	[ -z "$ifaceTableID" ] && ifaceTableID="$wanTableID"; [ -z "$ifaceMark" ] && ifaceMark="$wanMark";

	case "$action" in
		destroy)
			table_destroy "${ifaceTableID}" "${iface}" "${ifaceMark}"
			ifaceTableID="$((ifaceTableID + 1))"; ifaceMark="$(printf '0x%06x' $((ifaceMark + wanMark)))";
			;;
		create)
			eval "mark_${iface//-/_}"='$ifaceMark'
			eval "tid_${iface//-/_}"='$ifaceTableID'
			table_destroy "${ifaceTableID}" "${iface}"
			vpr_get_gateway gw4 "$iface" "$dev"
			vpr_get_gateway6 gw6 "$iface" "$dev6"
			if [ "$iface" = "$dev" ]; then
				displayText="${iface}/${gw4:-0.0.0.0}"
			else
				displayText="${iface}/${dev}/${gw4:-0.0.0.0}"
			fi
			[ "$ipv6Enabled" -ne 0 ] && displayText="${displayText}/${gw6:-::/0}"
			output 2 "Creating table '$displayText' "
			is_default_dev "$dev" && displayText="${displayText} ${__OK__}"
			if table_create "$ifaceTableID" "$ifaceMark" "$iface" "$gw4" "$dev" "$gw6" "$dev6"; then
				gatewaySummary="${gatewaySummary}${displayText}\\n"
				output_ok
			else
				errorSummary="${errorSummary}${_ERROR_}: Failed to set up '$displayText'\\n"
				output_fail
			fi
			ifaceTableID="$((ifaceTableID + 1))"; ifaceMark="$(printf '0x%06x' $((ifaceMark + wanMark)))";
			;;
	esac
	return $s
}

process_tor_interface(){
	local s=0 iface="$1" action="$2" displayText
	case "$action" in
		destroy)
			for i in PREROUTING FORWARD INPUT OUTPUT; do
				ipt -t nat -D "${i}" -m mark --mark "0x0/${fwMask}" -j "VPR_${i}"
				ipt -t nat -F "VPR_${i}"; ipt -t nat -X "VPR_${i}";
			done
			;;
		create)
			output 2 "Creating TOR redirects "
			dnsPort="$(grep -m1 DNSPort /etc/tor/torrc | awk -F: '{print $2}')"
			transPort="$(grep -m1 TransPort /etc/tor/torrc | awk -F: '{print $2}')"
			dnsPort="${dnsPort:-9053}"; transPort="${transPort:-9040}"; 
			for i in $usedChainsList; do
				ipt -t nat -N "VPR_${i}"
				ipt -t nat "$insertOption" "$i" -m mark --mark "0x0/${fwMask}" -j "VPR_${i}"
			done
			if ips 'create' "${iface}" 'hash:net comment' && ips 'flush' "${iface}"; then
				for i in $usedChainsList; do
					ipt -t nat -I "VPR_${i}" -p udp -m udp --dport 53 -m set --match-set "${iface}" dst -j REDIRECT --to-ports "$dnsPort" -m comment --comment "TorDNS-UDP" || s=1
					ipt -t nat -I "VPR_${i}" -p tcp -m tcp --dport 80 -m set --match-set "${iface}" dst -j REDIRECT --to-ports "$transPort" -m comment --comment "TorHTTP-TCP" || s=1
					ipt -t nat -I "VPR_${i}" -p udp -m udp --dport 80 -m set --match-set "${iface}" dst -j REDIRECT --to-ports "$transPort" -m comment --comment "TorHTTP-UDP" || s=1
					ipt -t nat -I "VPR_${i}" -p tcp -m tcp --dport 443 -m set --match-set "${iface}" dst -j REDIRECT --to-ports "$transPort" -m comment --comment "TorHTTPS-TCP" || s=1
					ipt -t nat -I "VPR_${i}" -p udp -m udp --dport 443 -m set --match-set "${iface}" dst -j REDIRECT --to-ports "$transPort" -m comment --comment "TorHTTPS-UDP" || s=1
				done
			else
				s=1
			fi
			displayText="${iface}/53->${dnsPort}/80,443->${transPort}"
			if [ "$s" -eq "0" ]; then
				gatewaySummary="${gatewaySummary}${displayText}\\n"
				output_ok
			else
				errorSummary="${errorSummary}${_ERROR_}: Failed to set up '$displayText'\\n"
				output_fail
			fi
			;;
	esac
	return $s
}

convert_config(){
	local i src_ipset dest_ipset resolver_ipset
	[ -s "/etc/config/${packageName}" ] || return 0
	grep -q "ignored_interfaces" "/etc/config/${packageName}" && sed -i 's/ignored_interfaces/ignored_interface/g' "/etc/config/${packageName}"
	grep -q "supported_interfaces" "/etc/config/${packageName}" && sed -i 's/supported_interfaces/supported_interface/g' "/etc/config/${packageName}"
	grep -q "local_addresses" "/etc/config/${packageName}" && sed -i 's/local_addresses/local_address/g' "/etc/config/${packageName}"
	grep -q "local_ports" "/etc/config/${packageName}" && sed -i 's/local_ports/local_port/g' "/etc/config/${packageName}"
	grep -q "remote_addresses" "/etc/config/${packageName}" && sed -i 's/remote_addresses/remote_address/g' "/etc/config/${packageName}"
	grep -q "remote_ports" "/etc/config/${packageName}" && sed -i 's/remote_ports/remote_port/g' "/etc/config/${packageName}"
	grep -q "ipset_enabled" "/etc/config/${packageName}" && sed -i 's/ipset_enabled/dest_ipset/g' "/etc/config/${packageName}"
	grep -q "dnsmasq_enabled" "/etc/config/${packageName}" && sed -i 's/dnsmasq_enabled/resolver_ipset/g' "/etc/config/${packageName}"
	grep -q "enable_control" "/etc/config/${packageName}" && sed -i 's/enable_control/webui_enable_column/g' "/etc/config/${packageName}"
	grep -q "proto_control" "/etc/config/${packageName}" && sed -i 's/proto_control/webui_protocol_column/g' "/etc/config/${packageName}"
	grep -q "chain_control" "/etc/config/${packageName}" && sed -i 's/chain_control/webui_chain_column/g' "/etc/config/${packageName}"
	grep -q "sort_control" "/etc/config/${packageName}" && sed -i 's/sort_control/webui_sorting/g' "/etc/config/${packageName}"
	grep -q "local_address" "/etc/config/${packageName}" && sed -i 's/local_address/src_addr/g' "/etc/config/${packageName}"
	grep -q "local_port" "/etc/config/${packageName}" && sed -i 's/local_port/src_port/g' "/etc/config/${packageName}"
	grep -q "remote_address" "/etc/config/${packageName}" && sed -i 's/remote_address/dest_addr/g' "/etc/config/${packageName}"
	grep -q "remote_port" "/etc/config/${packageName}" && sed -i 's/remote_port/dest_port/g' "/etc/config/${packageName}"
	grep -q "local_ipset" "/etc/config/${packageName}" && sed -i 's/local_ipset/src_ipset/g' "/etc/config/${packageName}"
	grep -q "remote_ipset" "/etc/config/${packageName}" && sed -i 's/remote_ipset/dest_ipset/g' "/etc/config/${packageName}"
	dest_ipset="$(uci -q get $packageName.config.dest_ipset)"
	src_ipset="$(uci -q get $packageName.config.src_ipset)"
	resolver_ipset="$(uci -q get $packageName.config.resolver_ipset)"
	
	if [ -n "$dest_ipset" ] && [ "$dest_ipset" != "0" ] && [ "$dest_ipset" != "1" ]; then
		uci set "$packageName".config.dest_ipset='0'
		if [ -z "$resolver_ipset" ]; then
			uci set "$packageName".config.resolver_ipset='dnsmasq.ipset'
		fi
		uci commit "$packageName"
	fi
	if [ -n "$src_ipset" ] && [ "$src_ipset" != "0" ] && [ "$src_ipset" != "1" ]; then
		uci set "$packageName".config.src_ipset='1'
		uci commit "$packageName"
	fi
	if [ -z "$(uci -q get $packageName.config.webui_supported_protocol)" ]; then
		uci add_list "$packageName".config.webui_supported_protocol='tcp'
		uci add_list "$packageName".config.webui_supported_protocol='udp'
		uci add_list "$packageName".config.webui_supported_protocol='tcp udp'
		uci add_list "$packageName".config.webui_supported_protocol='icmp'
		uci add_list "$packageName".config.webui_supported_protocol='all'
		uci commit "$packageName"
	fi
	for i in append_local_rules append_src_rules \
		append_remote_rules append_dest_rules; do
		if [ -n "$(uci -q get $packageName.config.$i)" ]; then
			warningSummary="${warningSummary}$_WARNING_: $i setting is not supported in ${serviceName}.\\n"
		fi
	done
	for i in udp_proto_enabled forward_chain_enabled input_chain_enabled \
		output_chain_enabled iprule_enabled; do
		if [ "$(uci -q get $packageName.config.$i)" = "1" ]; then
			warningSummary="${warningSummary}$_WARNING_: $i setting is not supported in ${serviceName}.\\n"
		fi
	done
}

check_config(){ local en; config_get_bool en "$1" 'enabled' 1; [ "$en" -gt 0 ] && _cfg_enabled=0; }
is_config_enabled(){
	local cfg="$1" _cfg_enabled=1
	[ -n "$1" ] || return 1
	config_load "$packageName"
	config_foreach check_config "$cfg"
	return "$_cfg_enabled"
}

process_user_file(){
	local path enabled shellBin="${SHELL:-/bin/ash}"
	config_get_bool enabled "$1" 'enabled' 1
	config_get      path    "$1" 'path'
	[ "$enabled" -gt 0 ] || return 0
	if [ ! -s "$path" ]; then
		errorSummary="${errorSummary}${_ERROR_}: Custom user file '$path' not found or empty!\\n"
		output_fail
		return 1
	fi
	if ! $shellBin -n "$path"; then
		errorSummary="${errorSummary}${_ERROR_}: Syntax error in custom user file '$path'!\\n"
		output_fail
		return 1
	fi
	output 2 "Running $path "
# shellcheck disable=SC1090
	if ! . "$path"; then
		errorSummary="${errorSummary}${_ERROR_}: Error running custom user file '$path'!\\n"
		if grep -q -w 'curl' "$path" && ! is_present 'curl'; then
			errorSummary="${errorSummary}${_ERROR_}: Use of 'curl' is detected in custom user file '$path', but 'curl' isn't installed!\\n"
			errorSummary="${errorSummary}${_ERROR_}: If 'curl' is needed, install it with 'opkg update; opkg install curl;' command in CLI.\\n"
		fi
		output_fail
		return 1
	else
		output_ok
		return 0
	fi
}

start_service() {
	local dnsmasqStoredHash dnsmasqNewHash i modprobeStatus=0
	convert_config
	is_enabled 'on_start' || return 1
	is_wan_up || return 1
	if create_lock; then
		if [ -s "$dnsmasqFile" ]; then
			dnsmasqStoredHash="$(md5sum $dnsmasqFile | awk '{ print $1; }')"
			rm -f "$dnsmasqFile"
		fi

		for i in xt_set ip_set ip_set_hash_ip; do
			modprobe "$i" >/dev/null 2>/dev/null || modprobeStatus=$((modprobeStatus + 1))
		done

		if [ "$modprobeStatus" -gt 0 ] && ! is_chaos_calmer; then
			errorSummary="${errorSummary}${_ERROR_}: Failed to load kernel modules\\n"
		fi

		for i in $usedChainsList; do
			ipt -t mangle -N "VPR_${i}"
			ipt -t mangle "$insertOption" "$i" -m mark --mark "0x0/${fwMask}" -j "VPR_${i}"
		done

		output 1 'Processing Interfaces '
		config_load 'network'; config_foreach process_interface 'interface' 'create';
		process_tor_interface 'tor' 'destroy'; is_tor_running && process_tor_interface 'tor' 'create';
		output 1 '\n'
		if is_config_enabled 'policy'; then
			output 1 'Processing Policies '
			config_load "$packageName"; config_foreach process_policy 'policy';
			output 1 '\n'
		fi
		if is_config_enabled 'include'; then
			output 1 'Processing User File(s) '
			config_load "$packageName"; config_foreach process_user_file 'include';
			output 1 '\n'
		fi

		if [ -s "$dnsmasqFile" ]; then
			dnsmasqNewHash="$(md5sum $dnsmasqFile | awk '{ print $1; }')"
		fi
		[ "$dnsmasqNewHash" != "$dnsmasqStoredHash" ] && dnsmasq_restart

		if [ -z "$gatewaySummary" ]; then
			errorSummary="${errorSummary}${_ERROR_}: failed to set up any gateway!\\n"
		fi
		procd_open_instance "main"
		procd_set_param command /bin/true
		procd_set_param stdout 1
		procd_set_param stderr 1
		procd_open_data
		json_add_array 'status'
		json_add_object ''
		[ -n "$gatewaySummary" ] && json_add_string gateway "$gatewaySummary"
		[ -n "$errorSummary" ] && json_add_string error "$errorSummary"
		[ -n "$warningSummary" ] && json_add_string warning "$warningSummary"
		if [ "$strictMode" -ne 0 ] && str_contains "$gatewaySummary" '0.0.0.0'; then
			json_add_string mode "strict"
		fi
		json_close_object
		json_close_array
		procd_close_data
		procd_close_instance
		remove_lock
	else
		output "$serviceName: another instance of ${packageName} is currently running "
		output_failn
		return 1
	fi
}

tmpfs() {
	local action="$1" param="$2" value="$3"
# shellcheck disable=SC2034
	local gateway error warning mode i
	if [ -s "$jsonFile" ]; then
		json_load_file "$jsonFile" 2>/dev/null
		json_select 'status' 2>/dev/null
		for i in gateway error warning mode; do
			json_get_var $i "$i" 2>/dev/null
		done
	fi
	case "$action" in
		get)
			printf "%b" "$(eval echo "\$$param")"; return;;
		add)
			eval "$param"='$(eval echo "\$$param")${value}';;
		del)
			case "$param" in
				all)
					unset gateway error warning mode;;
				*)
					unset "$param";;
			esac
			;;
		set)
			eval "$param"='$value';;
	esac
	json_init
	json_add_object 'status'
	json_add_string version "$PKG_VERSION"
	for i in gateway error warning mode; do
		json_add_string "$i" "$(eval echo "\$$i")"
	done 
	json_close_object
	json_dump > "$jsonFile"
	sync
}

service_started() {
	tmpfs set 'gateway' "$gatewaySummary"
	tmpfs set 'error' "$errorSummary"
	tmpfs set 'warning' "$warningSummary"
	if [ "$strictMode" -ne 0 ] && str_contains "$gatewaySummary" '0.0.0.0'; then
		tmpfs set 'mode' 'strict'
	fi
	[ -n "$gatewaySummary" ] && output "$serviceName started with gateways:\\n${gatewaySummary}"
	[ -n "$errorSummary" ] && output "${errorSummary}"
	[ -n "$warningSummary" ] && output "${warningSummary}"
	if [ -n "$errorSummary" ]; then
		return 2
	elif [ -n "$warningSummary" ]; then
		return 1
	else
		return 0
	fi
}

stop_service() {
	local i
	iptables -t mangle -L | grep -q VPR_PREROUTING || return 0
	if create_lock; then
		load_package_config
		for i in PREROUTING FORWARD INPUT OUTPUT; do
			ipt -t mangle -D "${i}" -m mark --mark "0x0/${fwMask}" -j "VPR_${i}"
			ipt -t mangle -F "VPR_${i}"; ipt -t mangle -X "VPR_${i}";
		done
		config_load 'network'; config_foreach process_interface 'interface' 'destroy';
		process_tor_interface 'tor' 'destroy'
		unset ifaceTableID; unset ifaceMark;
		if [ -s "$dnsmasqFile" ]; then
			rm -f "$dnsmasqFile"
			dnsmasq_restart
		fi
		if [ "$serviceEnabled" -ne 0 ]; then
			output "$serviceName stopped "; output_okn;
		fi
		remove_lock
	else
		output "$serviceName: another instance of ${packageName} is currently running "; output_failn;
		return 1
	fi
}

# shellcheck disable=SC2119
service_triggers() {
	local n
	is_enabled || return 1

	if [ "$procdReloadDelay" -gt 0 ] && [ "$procdReloadDelay" -lt 100 ]; then
# shellcheck disable=SC2034
		PROCD_RELOAD_DELAY=$(( procdReloadDelay * 1000  ))
	fi

	procd_open_validate
		validate_config
		validate_policy
		validate_include
	procd_close_validate

	procd_open_trigger
		procd_add_reload_trigger 'openvpn'
		if type procd_add_service_trigger 1>/dev/null 2>&1; then
			procd_add_service_trigger "service.restart" "firewall" /etc/init.d/${packageName} reload
		fi
		procd_add_config_trigger "config.change" "${packageName}" /etc/init.d/${packageName} reload
		for n in $ifSupported; do procd_add_reload_interface_trigger "$n"; procd_add_interface_trigger "interface.*" "$n" /etc/init.d/${packageName} reload; done;
	procd_close_trigger

	output 3 "$serviceName monitoring interfaces: $ifSupported"; output_okn;
}

status_service() { support "$@"; }
support() {
	local dist vers out id s param status set_d set_p tableCount i=0 dev dev6 j
	readonly _SEPARATOR_='============================================================'
	is_enabled

	json_load "$(ubus call system board)"; json_select release; json_get_var dist distribution; json_get_var vers version
	if [ -n "$wanIface4" ]; then
		network_get_gateway wanGW4 "$wanIface4"
		dev="$(uci -q get network."${wanIface4}".ifname)"
	fi
	if [ -n "$wanIface6" ]; then
		dev6="$(uci -q get network."${wanIface6}".ifname)"
		wanGW6=$(ip -6 route show | grep -m1 " dev $dev6 " | awk '{print $1}')
		[ "$wanGW6" = "default" ] && wanGW6=$(ip -6 route show | grep -m1 " dev $dev6 " | awk '{print $3}')
	fi
	while [ "${1:0:1}" = "-" ]; do param="${1//-/}"; eval "set_$param=1"; shift; done
	[ -e "/var/${packageName}-support" ] && rm -f "/var/${packageName}-support"
	status="$serviceName running on $dist $vers."
	[ -n "$wanIface4" ] && status="$status WAN (IPv4): ${wanIface4}/${dev}/${wanGW4:-0.0.0.0}."
	[ -n "$wanIface6" ] && status="$status WAN (IPv6): ${wanIface6}/${dev6}/${wanGW6:-::/0}."
	{
		echo "$status"
		echo "$_SEPARATOR_"
		dnsmasq --version 2>/dev/null | sed '/^$/,$d'
		if [ -n "$1" ]; then
			echo "$_SEPARATOR_"
			echo "Resolving domains"
			for i in $1; do
				echo "$i: $(resolveip "$i" | tr '\n' ' ')"
			done
		fi

		echo "$_SEPARATOR_"
		echo "Routes/IP Rules"
		tableCount=$(ip rule list | grep -c 'fwmark') || tableCount=0
		if [ -n "$set_d" ]; then route; else route | grep '^default'; fi
		if [ -n "$set_d" ]; then ip rule list; fi
		i=0; while [ $i -lt $tableCount ]; do 
			echo ""
			echo "IPv4 Table $((wanTableID + i)): $(ip -4 route show table $((wanTableID + i)))"
			echo "IPv4 Table $((wanTableID + i)) Rules:"
			ip -4 rule list table "$((wanTableID + i))"
			i=$((i + 1))
		done

		if [ "$ipv6Enabled" -ne 0 ]; then
			i=0; while [ $i -lt $tableCount ]; do
				ip -6 route show table $((wanTableID + i)) | while read -r param; do
					echo "IPv6 Table $((wanTableID + i)): $param"
				done
				i=$((i + 1))
			done
		fi

		for j in Mangle NAT; do
			if [ -z "$set_d" ]; then
				for i in $usedChainsList; do
					if iptables -v -t "$(str_to_lower $j)" -S "VPR_${i}" 1>/dev/null 2>&1; then
						echo "$_SEPARATOR_"
						echo "$j IP Table: $i"
						iptables -v -t "$(str_to_lower $j)" -S "VPR_${i}"
						if [ "$ipv6Enabled" -ne 0 ]; then
							echo "$_SEPARATOR_"
							echo "$j IPv6 Table: $i"
							ip6tables -v -t "$(str_to_lower $j)" -S "VPR_${i}"
						fi
					fi
				done
			else
				echo "$_SEPARATOR_"
				echo "$j IP Table"
				iptables -L -t "$(str_to_lower $j)"
				if [ "$ipv6Enabled" -ne 0 ]; then
					echo "$_SEPARATOR_"
					echo "$j IPv6 Table"
					ip6tables -L -t "$(str_to_lower $j)"
				fi
			fi
			i=0; ifaceMark="$wanMark";
			while [ $i -lt $tableCount ]; do
				if iptables -v -t "$(str_to_lower $j)" -S "VPR_MARK${ifaceMark}" 1>/dev/null 2>&1; then
					echo "$_SEPARATOR_"
					echo "$j IP Table MARK Chain: VPR_MARK${ifaceMark}"
					iptables -v -t "$(str_to_lower $j)" -S "VPR_MARK${ifaceMark}"
					ifaceMark="$(printf '0x%06x' $((ifaceMark + wanMark)))";
				fi
				i=$((i + 1))
			done
		done

		echo "$_SEPARATOR_"
		echo "Current ipsets"
		ipset save
		if [ -s "$dnsmasqFile" ]; then
			echo "$_SEPARATOR_"
			echo "DNSMASQ ipsets"
			cat "$dnsmasqFile"
		fi
		echo "$_SEPARATOR_"
	} | tee -a /var/${packageName}-support
	if [ -n "$set_p" ]; then
		printf "%b" "Pasting to paste.ee... "
		if is_present 'curl' && is_variant_installed 'libopenssl' && is_installed 'ca-bundle'; then
			json_init; json_add_string "description" "${packageName}-support"
			json_add_array "sections"; json_add_object '0'
			json_add_string "name" "$(uci -q get system.@system[0].hostname)"
			json_add_string "contents" "$(cat /var/${packageName}-support)"
			json_close_object; json_close_array; payload=$(json_dump)
			out=$(curl -s -k "https://api.paste.ee/v1/pastes" -X "POST" -H "Content-Type: application/json" -H "X-Auth-Token:uVOJt6pNqjcEWu7qiuUuuxWQafpHhwMvNEBviRV2B" -d "$payload")
			json_load "$out"; json_get_var id id; json_get_var s success
			[ "$s" = "1" ] && printf "%b" "https://paste.ee/p/$id $__OK__\\n" || printf "%b" "$__FAIL__\\n"
			[ -e "/var/${packageName}-support" ] && rm -f "/var/${packageName}-support"
		else
			printf "%b" "$__FAIL__\\n"
			printf "%b" "$_ERROR_: curl, libopenssl or ca-bundle were not found!\\nRun 'opkg update; opkg install curl libopenssl ca-bundle' to install them.\\n"
		fi
	else
		printf "%b" "Your support details have been logged to '/var/${packageName}-support'. $__OK__\\n"
	fi
}

# shellcheck disable=SC2120
validate_config() {
	uci_validate_section "${packageName}" config "${1}" \
		'enabled:bool:0' \
		'strict_enforcement:bool:1' \
		'ipv6_enabled:bool:0' \
		'src_ipset:bool:0' \
		'dest_ipset:bool:0' \
		'resolver_ipset::or("", "none", "dnsmasq.ipset")' \
		'verbosity:range(0,2):1' \
		'wan_tid:integer:201' \
		'wan_fw_mark:hex(8)' \
		'fw_mask:hex(8)' \
		'icmp_interface:string' \
		'ignored_interface:list(string)' \
		'supported_interface:list(string)' \
		'boot_timeout:integer:30' \
		'iptables_rule_option:or("", "append", "insert")' \
		'procd_reload_delay:integer:0' \
		'webui_enable_column:bool:0' \
		'webui_protocol_column:bool:0' \
		'webui_supported_protocol:list(string)' \
		'webui_chain_column:bool:0' \
		'webui_sorting:bool:1' \
		'webui_show_ignore_target:bool:0'
}

# shellcheck disable=SC2120
validate_policy() {
	uci_validate_section "${packageName}" policy "${1}" \
		'name:string' \
		'enabled:bool:0' \
		'interface:network' \
		'proto:or(string)' \
		'chain:or("", "PREROUTING", "FORWARD", "INPUT", "OUTPUT")' \
		'src_addr:list(neg(or(host,network,macaddr)))' \
		'src_port:list(neg(or(portrange, string)))' \
		'dest_addr:list(neg(host))' \
		'dest_port:list(neg(or(portrange, string)))'
}

# shellcheck disable=SC2120
validate_include() {
	uci_validate_section "${packageName}" include "${1}" \
		'path:string' \
		'enabled:bool:0'
}