external/routing/olsrd/files/olsrd.sh - T108 - Gitiles

 #!/bin/sh /etc/rc.common
 # Copyright (C) 2008-2017 OpenWrt.org

 OLSRD_OLSRD_SCHEMA='ignore:internal config_file:internal DebugLevel=0 AllowNoInt=yes'
 OLSRD_IPCCONNECT_SCHEMA='ignore:internal Host:list Net:list2'
 OLSRD_LOADPLUGIN_SCHEMA='ignore:internal library:internal Host4:list Net4:list2 Host:list Net:list2 Host6:list Net6:list2 Ping:list redistribute:list NonOlsrIf:list name:list lat lon latlon_infile HNA:list2 hosts:list2 ipv6only:bool'
 OLSRD_INTERFACE_SCHEMA='ignore:internal interface:internal AutoDetectChanges:bool LinkQualityMult:list2'
 OLSRD_INTERFACE_DEFAULTS_SCHEMA='AutoDetectChanges:bool'

 T='	'
 N='
 '

 log() {
 	logger -t olsrd -p daemon.info -s "${initscript}: $*"
 }

 error() {
         logger -t olsrd -p daemon.err -s "${initscript}: ERROR: $*"
 }

 warn() {
         logger -t olsrd -p daemon.warn -s "${initscript}: WARNING: $*"
 }

 validate_varname() {
 	local varname="$1"
 	[ -z "$varname" -o "$varname" != "${varname%%[!A-Za-z0-9_]*}" ] && return 1
 	return 0
 }

 olsrd_list_configured_interfaces()
 {
 	local i=0
 	local interface

 	while interface="$( uci -q get $OLSRD.@Interface[$i].interface )"; do {
 		case "$( uci -q get $OLSRD.@Interface[$i].ignore )" in
 			1|on|true|enabled|yes)
 				# is disabled
 			;;
 			*)
 				echo "$interface"	# e.g. 'lan'
 			;;
 		esac

 		i=$(( i + 1 ))
 	} done
 }

 olsrd_interface_already_in_config()
 {
 	# e.g.: 'Interface "eth0.1" "eth0.2" "wlan0"'
 	if grep -s ^'Interface ' "/var/etc/$OLSRD.conf" | grep -q "\"$DEVICE\""; then
 		logger -t olsrd_hotplug -p daemon.debug "[OK] already_active: '$INTERFACE' => '$DEVICE'"
 		return 0
 	else
 		logger -t olsrd_hotplug -p daemon.info "[OK] ifup: '$INTERFACE' => '$DEVICE'"
 		return 1
 	fi
 }

 olsrd_interface_needs_adding()
 {
 	local interface

 	# likely and cheap operation:
 	olsrd_interface_already_in_config && return 1

 	for interface in $(olsrd_list_configured_interfaces); do {
 		[ "$interface" = "$INTERFACE" ] && {
 			olsrd_interface_already_in_config || return 0
 		}
 	} done

 	logger -t olsrd_hotplug -p daemon.debug "[OK] interface '$INTERFACE' => '$DEVICE' not used for $OLSRD"
 	return 1
 }

 validate_olsrd_option() {
 	local str="$1"
 	[ -z "$str" -o "$str" != "${str%%[! 	0-9A-Za-z.%/|:_-]*}" ] && return 1
 	return 0
 }

 system_config() {
 	local cfg="$1"
 	local cfgt hostname latlon oldIFS

 	config_get cfgt "$cfg" TYPE

 	if [ "$cfgt" = "system" ]; then
 		config_get hostname "$cfg" hostname
 		hostname="${hostname:-OpenWrt}"
 		SYSTEM_HOSTNAME="$hostname"
 	fi

 	if [ -z "$SYSTEM_LAT" -o -z "$SYSTEM_LON" ]; then
 		config_get latlon "$cfg" latlon
 		oldIFS="$IFS"; IFS=" ${T}${N},"; set -- $latlon; IFS="$oldIFS"
 		SYSTEM_LAT="$1"
 		SYSTEM_LON="$2"
 	fi

 	if [ -z "$SYSTEM_LAT" -o -z "$SYSTEM_LON" ]; then
 		config_get latlon "$cfg" latitude
 		SYSTEM_LAT="$latlon"
 		config_get latlon "$cfg" longitude
 		SYSTEM_LON="$latlon"
 	fi
 }

 olsrd_find_config_file() {
 	local cfg="$1"
 	validate_varname "$cfg" || return 0

 	config_get_bool ignore "$cfg" ignore 0
 	[ "$ignore" -ne 0 ] && return 0
 	config_get OLSRD_CONFIG_FILE "$cfg" config_file

 	return 0
 }

 warning_invalid_value() {
 	local funcname="warning_invalid_value"
 	local package="$1"
 	validate_varname "$package" || package=
 	local config="$2"
 	validate_varname "$config" || config=
 	local option="$3"
 	validate_varname "$option" || option=

 	if [ -n "$package" -a -n "$config" ]; then
 		log "$funcname() in option '$package.$config${option:+.}$option', skipped"
 	else
 		log "$funcname() skipped"
 	fi

 	return 0
 }

 olsrd_write_option() {
 	local param="$1"
 	local cfg="$2"
 	validate_varname "$cfg" || return 1
 	local option="$3"
 	validate_varname "$option" || return 1
 	local value="$4"
 	local option_type="$5"

 	if [ "$option_type" = bool ]; then
 		case "$value" in
 			1|on|true|enabled|yes) value=yes;;
 			0|off|false|disabled|no) value=no;;
 			*) warning_invalid_value olsrd "$cfg" "$option"; return 1;;
 		esac
 	fi

 	if ! validate_olsrd_option "$value"; then
 		warning_invalid_value olsrd "$cfg" "$option"
 		return 1
 	fi

 	if [ "$value" != "${value%%[G-Zg-z_-]*}" ]; then
 		if [ "$option" != "Ip6AddrType" -a "$option" != "LinkQualityMult" -a "$value" != "yes" -a "$value" != "no" ]; then
 			value="\"$value\""
 		fi
 	fi

 	printf '%s' "${N}$param$option $value"
 }

 olsrd_write_plparam() {
 	local funcname="olsrd_write_plparam"
 	local param="$1"
 	local cfg="$2"
 	local option="$3"
 	local value="$4"
 	local option_type="$5"
 	local _option oldIFS

 	validate_varname "$cfg" || return 1
 	validate_varname "$option" || return 1

 	if [ "$option_type" = bool ]; then
 		case "$value" in
 			1|on|true|enabled|yes) value=yes;;
 			0|off|false|disabled|no) value=no;;
 			*) warning_invalid_value olsrd "$cfg" "$option"; return 1;;
 		esac
 	fi

 	if ! validate_olsrd_option "$value"; then
 		warning_invalid_value olsrd "$cfg" "$option"
 		return 1
 	fi

 	oldIFS="$IFS"
 	IFS='-_'
 	set -- $option
 	option="$*"
 	IFS="$oldIFS"
 	_option="$option"

 	if [ "$option" = 'hosts' ]; then
 		set -- $value
 		option="$1"
 		shift
 		value="$*"
 	fi

 	if [ "$option" = 'NonOlsrIf' ]; then
 		if validate_varname "$value"; then
 			if network_get_device ifname "$value"; then
 				log "$funcname() Info: mdns Interface '$value' ifname '$ifname' found"
 			else
 				log "$funcname() Warning: mdns Interface '$value' not found, skipped"
 			fi
 		else
 			warning_invalid_value olsrd "$cfg" "NonOlsrIf"
 		fi

 		[ -z "$ifname" ] || value=$ifname
 	fi

 	printf '%s' "${N}${param}PlParam \"$option\" \"$value\""
 }

 config_update_schema() {
 	local schema_varname="$1"
 	local command="$2"
 	local option="$3"
 	local value="$4"
 	local schema
 	local cur_option

 	validate_varname "$schema_varname" || return 1
 	validate_varname "$command" || return 1
 	validate_varname "$option" || return 1

 	case "$varname" in
 		*_LENGTH) return 0;;
 		*_ITEM*) return 0;;
 	esac

 	eval "export -n -- \"schema=\${$schema_varname}\""

 	for cur_option in $schema; do
 		[ "${cur_option%%[:=]*}" = "$option" ] && return 0
 	done

 	if [ "$command" = list ]; then
 		set -- $value
 		if [ "$#" -ge "3" ]; then
 			schema_entry="$option:list3"
 		elif [ "$#" -ge "2" ]; then
 			schema_entry="$option:list2"
 		else
 			schema_entry="$option:list"
 		fi
 	else
 		schema_entry="$option"
 	fi

 	append "$schema_varname" "$schema_entry"

 	return 0
 }

 config_write_options() {
 	local funcname="config_write_options"
 	local schema="$1"
 	local cfg="$2"
 	validate_varname "$cfg" || return 1
 	local write_func="$3"
 	[ -z "$write_func" ] && output_func=echo
 	local write_param="$4"

 	local schema_entry option option_length option_type default value list_size list_item list_value i position speed oldIFS
 	local list_speed_vars="HelloInterval HelloValidityTime TcInterval TcValidityTime MidInterval MidValidityTime HnaInterval HnaValidityTime"

 	get_value_for_entry()
 	{
 		local schema_entry="$1"

 		default="${schema_entry#*[=]}"
 		[ "$default" = "$schema_entry" ] && default=
 		option="${schema_entry%%[=]*}"

 		oldIFS="$IFS"; IFS=':'; set -- $option; IFS="$oldIFS"
 		option="$1"
 		option_type="$2"

 		validate_varname "$option" || return 1
 		[ -z "$option_type" ] || validate_varname "$option_type" || return 1
 		[ "$option_type" = internal ] && return 1

 		config_get value "$cfg" "$option"
 		[ "$option" = "speed" ] && return 1

 		return 0
 	}

 	already_in_schema()
 	{
 		case " $schema " in
 			*" $1 "*)
 				return 0
 			;;
 			*)
 				return 1
 			;;
 		esac
 	}

 	already_in_schema "speed" && {
 		get_value_for_entry "speed"

 		if test 2>/dev/null "$value" -gt 0 -a "$value" -le 20 ; then
 			speed="$value"
 		else
 			log "$funcname() Warning: invalid speed-value: '$value' - allowed integers: 1...20, fallback to 6"
 			speed=6
 		fi

 		for schema_entry in $list_speed_vars; do {
 			already_in_schema "$schema_entry" || schema="$schema $schema_entry"
 		} done
 	}

 	for schema_entry in $schema; do
 		if [ -n "$speed" ]; then		# like sven-ola freifunk firmware fff-1.7.4
 			case "$schema_entry" in
 				HelloInterval)
 					value="$(( speed / 2 + 1 )).0"
 				;;
 				HelloValidityTime)
 					value="$(( speed * 25 )).0"
 				;;
 				TcInterval)	# todo: not fisheye? -> $(( speed * 2 ))
 					value=$(( speed / 2 ))
 					[ $value -eq 0 ] && value=1
 					value="$value.0"
 				;;
 				TcValidityTime)
 					value="$(( speed * 100 )).0"
 				;;
 				MidInterval)
 					value="$(( speed * 5 )).0"
 				;;
 				MidValidityTime)
 					value="$(( speed * 100 )).0"
 				;;
 				HnaInterval)
 					value="$(( speed * 2 )).0"
 				;;
 				HnaValidityTime)
 					value="$(( speed * 25 )).0"
 				;;
 				*)
 					get_value_for_entry "$schema_entry" || continue
 				;;
 			esac

 			is_speed_var()
 			{
 				case " $list_speed_vars " in
 					*" $1 "*)
 						return 0
 					;;
 					*)
 						return 1
 					;;
 				esac
 			}

 			is_speed_var "$schema_entry" && option="$schema_entry"
 		else
 			get_value_for_entry "$schema_entry" || continue
 		fi

 		if [ -z "$value" ]; then
 			oldIFS="$IFS"; IFS='+'; set -- $default; IFS="$oldIFS"
 			value=$*
 		elif [ "$value" = '-' -a -n "$default" ]; then
 			continue
 		fi

 		[ -z "$value" ] && continue

 		case "$option_type" in
 			list) list_size=1;;
 			list2) list_size=2;;
 			list3) list_size=3;;
 			*) list_size=0;;
 		esac

 		if [ "$list_size" -gt 0 ]; then
 			config_get option_length "$cfg" "${option}_LENGTH"
 			if [ -n "$option_length" ]; then
 				i=1
 				while [ "$i" -le "$option_length" ]; do
 					config_get list_value "$cfg" "${option}_ITEM$i"
 					"$write_func" "$write_param" "$cfg" "$option" "$list_value" "$option_type" || break
 					i=$((i + 1))
 				done
 			else
 				list_value=
 				i=0
 				for list_item in $value; do
 					append "list_value" "$list_item"
 					i=$((i + 1))
 					position=$((i % list_size))
 					if [ "$position" -eq 0 ]; then
 						"$write_func" "$write_param" "$cfg" "$option" "$list_value" "$option_type" || break
 						list_value=
 					fi
 				done
 				[ "$position" -ne 0 ] && "$write_func" "$write_param" "$cfg" "$option" "$list_value" "$option_type"
 			fi
 		else
 			"$write_func" "$write_param" "$cfg" "$option" "$value" "$option_type"
 		fi
 	done

 	return 0
 }

 olsrd_write_olsrd() {
 	local cfg="$1"
 	validate_varname "$cfg" || return 0
 	local ignore

 	config_get_bool ignore "$cfg" ignore 0
 	[ "$ignore" -ne 0 ] && return 0

 	[ "$OLSRD_COUNT" -gt 0 ] && return 0

 	config_get smartgateway "$cfg" SmartGateway
 	config_get smartgatewayuplink "$cfg" SmartGatewayUplink
 	export smartgateway
 	export smartgatewayuplink

 	config_write_options "$OLSRD_OLSRD_SCHEMA" "$cfg" olsrd_write_option
 	echo
 	OLSRD_COUNT=$((OLSRD_COUNT + 1))
 	return 0
 }

 olsrd_write_ipcconnect() {
 	local cfg="$1"
 	validate_varname "$cfg" || return 0
 	local ignore

 	config_get_bool ignore "$cfg" ignore 0
 	[ "$ignore" -ne 0 ] && return 0

 	[ "$IPCCONNECT_COUNT" -gt 0 ] && return 0

 	printf '%s' "${N}IpcConnect${N}{"
 	config_write_options "$OLSRD_IPCCONNECT_SCHEMA" "$cfg" olsrd_write_option "${T}"
 	echo "${N}}"
 	IPCCONNECT_COUNT=$((IPCCONNECT_COUNT + 1))
 }

 olsrd_write_hna4() {
 	local cfg="$1"
 	validate_varname "$cfg" || return 0
 	local ignore

 	config_get_bool ignore "$cfg" ignore 0
 	[ "$ignore" -ne 0 ] && return 0

 	config_get netaddr "$cfg" netaddr
 	if ! validate_olsrd_option "$netaddr"; then
 		warning_invalid_value olsrd "$cfg" "netaddr"
 		return 0
 	fi

 	config_get netmask "$cfg" netmask
 	if ! validate_olsrd_option "$netmask"; then
 		warning_invalid_value olsrd "$cfg" "netmask"
 		return 0
 	fi

 	[ "$HNA4_COUNT" -le 0 ] && printf '%s' "${N}Hna4${N}{"
 	printf '%s' "${N}${T}${T}$netaddr $netmask"
 	HNA4_COUNT=$((HNA4_COUNT + 1))
 }

 olsrd_write_hna6() {
 	local cfg="$1"
 	validate_varname "$cfg" || return 0
 	local ignore

 	config_get_bool ignore "$cfg" ignore 0
 	[ "$ignore" -ne 0 ] && return 0

 	config_get netaddr "$cfg" netaddr
 	if ! validate_olsrd_option "$netaddr"; then
 		warning_invalid_value olsrd "$cfg" "netaddr"
 		return 0
 	fi

 	config_get prefix "$cfg" prefix
 	if ! validate_olsrd_option "$prefix"; then
 		warning_invalid_value olsrd "$cfg" "prefix"
 		return 0
 	fi

 	[ "$HNA6_COUNT" -le 0 ] && printf '%s' "${N}Hna6${N}{"
 	printf '%s' "${N}${T}${T}$netaddr $prefix"
 	HNA6_COUNT=$((HNA6_COUNT + 1))
 }

 find_most_recent_plugin_libary()
 {
 	local library="$1"	# e.g. 'olsrd_dyn_gw' or 'olsrd_txtinfo.so.1.1'
 	local file file_fullpath unixtime

 	for file in "/lib/$library"* "/usr/lib/$library"* "/usr/local/lib/$library"*; do {
 		[ -f "$file" ] && {
 			file_fullpath="$file"
 			file="$( basename "$file" )"
 			# make sure that we do not select
 			# 'olsrd_dyn_gw_plain.so.0.4' if user wants
 			# 'olsrd_dyn_gw.so.0.5' -> compare part before 1st dot
 			[ "${library%%.*}" = "${file%%.*}" ] && {
 				unixtime="$( date +%s -r "$file_fullpath" )"
 				echo "$unixtime $file"
 			}
 		}
 	} done | sort -n | tail -n1 | cut -d' ' -f2
 }

 olsrd_write_loadplugin()
 {
 	local funcname='olsrd_write_loadplugin'
 	local cfg="$1"
 	local ignore name suffix lat lon latlon_infile

 	validate_varname "$cfg" || return 0

 	config_get_bool ignore "$cfg" ignore 0
 	[ "$ignore" -ne 0 ] && return 0

 	# e.g. olsrd_txtinfo.so.1.1 or 'olsrd_txtinfo'
 	config_get library "$cfg" library

 	library="$( find_most_recent_plugin_libary "$library" )"
 	if [ -z "$library" ]; then
 		log "$funcname() Warning: Plugin library '$library' not found, skipped"
 		return 0
 	else
 		library="$( basename "$library" )"
 	fi

 	validate_olsrd_option "$library" || {
 		warning_invalid_value olsrd "$cfg" 'library'
 		return 0
 	}

 	case "$library" in
 		'olsrd_nameservice.'*)
 			config_get name "$cfg" name
 			[ -z "$name" ] && config_set "$cfg" name $SYSTEM_HOSTNAME

 			config_get suffix "$cfg" suffix
 			[ -z "$suffix" ] && config_set "$cfg" suffix '.olsr'

 			config_get lat "$cfg" lat
 			config_get lon "$cfg" lon
 			config_get latlon_infile "$cfg" latlon_infile
 			if [ \( -z "$lat" -o -z "$lat" \) -a -z "$latlon_infile" ]; then
 				if [ -f '/var/run/latlon.txt' ]; then
 					config_set "$cfg" lat ''
 					config_set "$cfg" lon ''
 					config_set "$cfg" latlon_infile '/var/run/latlon.txt'
 				else
 					config_set "$cfg" lat "$SYSTEM_LAT"
 					config_set "$cfg" lon "$SYSTEM_LON"
 				fi
 			fi

 			for f in latlon_file hosts_file services_file resolv_file macs_file; do
 				config_get $f "$cfg" $f
 			done

 			[ -z "$latlon_file" ] && config_set "$cfg" latlon_file '/var/run/latlon.js'
 		;;
 		'olsrd_watchdog.'*)
 			config_get wd_file "$cfg" file
 		;;
 	esac

 	printf '%s' "${N}LoadPlugin \"$library\"${N}{"
 	config_write_options "$OLSRD_LOADPLUGIN_SCHEMA" "$cfg" olsrd_write_plparam "${T}"
 	echo "${N}}"
 }

 olsrd_write_interface() {
 	local funcname="olsrd_write_interface"
 	local cfg="$1"
 	validate_varname "$cfg" || return 0
 	local ignore
 	local interfaces
 	local interface
 	local ifnames

 	config_get_bool ignore "$cfg" ignore 0
 	[ "$ignore" -ne 0 ] && return 0

 	ifnames=
 	config_get interfaces "$cfg" interface

 	for interface in $interfaces; do
 		if validate_varname "$interface"; then
 			if network_get_device IFNAME "$interface"; then
 				ifnames="$ifnames \"$IFNAME\""
 				ifsglobal="$ifsglobal $IFNAME"
 			elif network_get_physdev IFNAME "$interface"; then
 				local proto="$(uci -q get network.${interface}.proto)"
 				if [ "$proto" = "static" -o "$proto" = "none" ]; then
 					ifnames="$ifnames \"$IFNAME\""
 					ifsglobal="$ifsglobal $IFNAME"
 				fi
 			elif [[ "$(ip -details link show dev $interface)" == *"wireguard"* ]]; then
 				# wireguard interface
 				ifnames="$ifnames \"$interface\""
 				ifsglobal="$ifsglobal $interface"
 			else
 				log "$funcname() Warning: Interface '$interface' not found, skipped"
 			fi
 		else
 			warning_invalid_value olsrd "$cfg" "interface"
 		fi
 	done

 	[ -z "$ifnames" ] && return 0

 	printf '%s' "${N}Interface$ifnames${N}{"
 	config_write_options "$OLSRD_INTERFACE_SCHEMA" "$cfg" olsrd_write_option "${T}"
 	echo "${N}}"
 	INTERFACES_COUNT=$((INTERFACES_COUNT + 1))
 }

 olsrd_write_interface_defaults() {
 	local cfg="$1"
 	validate_varname "$cfg" || return 0

 	printf '%s' "${N}InterfaceDefaults$ifnames${N}{"
 	config_write_options "$OLSRD_INTERFACE_DEFAULTS_SCHEMA" "$cfg" olsrd_write_option "${T}"
 	echo "${N}}"

 	return 1
 }

 olsrd_update_schema() {
 	local command="$1"
 	local varname="$2"
 	local value="$3"
 	local cfg="$CONFIG_SECTION"
 	local cfgt

 	validate_varname "$command" || return 0
 	validate_varname "$varname" || return 0

 	config_get cfgt "$cfg" TYPE
 	case "$cfgt" in
 		olsrd) config_update_schema OLSRD_OLSRD_SCHEMA "$command" "$varname" "$value";;
 		IpcConnect) config_update_schema OLSRD_IPCCONNECT_SCHEMA "$command" "$varname" "$value";;
 		LoadPlugin) config_update_schema OLSRD_LOADPLUGIN_SCHEMA "$command" "$varname" "$value";;
 		Interface) config_update_schema OLSRD_INTERFACE_SCHEMA "$command" "$varname" "$value";;
 		InterfaceDefaults) config_update_schema OLSRD_INTERFACE_DEFAULTS_SCHEMA "$command" "$varname" "$value";;
 	esac

 	return 0
 }

 olsrd_write_config() {
 	OLSRD_COUNT=0
 	config_foreach olsrd_write_olsrd olsrd
 	IPCCONNECT_COUNT=0
 	config_foreach olsrd_write_ipcconnect IpcConnect
 	HNA4_COUNT=0
 	config_foreach olsrd_write_hna4 Hna4
 	[ "$HNA4_COUNT" -gt 0 ] && echo "${N}}"
 	HNA6_COUNT=0
 	config_foreach olsrd_write_hna6 Hna6
 	[ "$HNA6_COUNT" -gt 0 ] && echo "${N}}"
 	config_foreach olsrd_write_loadplugin LoadPlugin
 	INTERFACES_COUNT=0
 	config_foreach olsrd_write_interface_defaults InterfaceDefaults
 	config_foreach olsrd_write_interface Interface
 	echo

 	return 0
 }

 get_wan_ifnames()
 {
 	local wanifnames word catch_next

 	command -v ip >/dev/null || return 1

 	set -- $( ip route list exact 0.0.0.0/0 table all )
 	for word in $*; do
 		case "$word" in
 			dev)
 				catch_next="true"
 			;;
 			*)
 				[ -n "$catch_next" ] && {
 					case "$wanifnames" in
 						*" $word "*)
 						;;
 						*)
 							wanifnames="$wanifnames $word "
 						;;
 					esac

 					catch_next=
 				}
 			;;
 		esac
 	done

 	echo "$wanifnames"
 }

 olsrd_setup_smartgw_rules() {
 	local funcname="olsrd_setup_smartgw_rules"
 	local file=

 	for file in /etc/modules.d/[0-9]*-ipip; do :; done
 	[ -e "$file" ] || {
 		log "$funcname() Warning: kmod-ipip is missing. SmartGateway will not work until you install it."
 		return 1
 	}

 	local wanifnames="$( get_wan_ifnames )"

 	if [ -z "$wanifnames" ]; then
 		nowan=1
 	else
 		nowan=0
 	fi

 	IP4T="$( command -v iptables )"
 	IP6T="$( command -v ip6tables )"

 	# Delete smartgw firewall rules first
 	if [ "$UCI_CONF_NAME" = "olsrd6" ]; then
 		while $IP6T -D forwarding_rule -o tnl_+ -j ACCEPT 2> /dev/null; do :;done
 		for IFACE in $wanifnames; do
 			while $IP6T -D forwarding_rule -i tunl0 -o $IFACE -j ACCEPT 2> /dev/null; do :; done
 		done
 		for IFACE in $ifsglobal; do
 			while $IP6T -D input_rule -i $IFACE -p 4 -j ACCEPT 2> /dev/null; do :; done
 		done
 	else
 		while $IP4T -D forwarding_rule -o tnl_+ -j ACCEPT 2> /dev/null; do :;done
 		for IFACE in $wanifnames; do
 			while $IP4T -D forwarding_rule -i tunl0 -o $IFACE -j ACCEPT 2> /dev/null; do :; done
 		done
 		for IFACE in $ifsglobal; do
 			while $IP4T -D input_rule -i $IFACE -p 4 -j ACCEPT 2> /dev/null; do :; done
 		done
 		while $IP4T -t nat -D postrouting_rule -o tnl_+ -j MASQUERADE 2> /dev/null; do :;done
 	fi

 	# var 'smartgateway' + 'smartgatewayuplink' build in olsrd_write_olsrd()
 	if [ "$smartgateway" = "yes" ]; then
 		log "$funcname() Notice: Inserting firewall rules for SmartGateway"

 		if [ ! "$smartgatewayuplink" = "none" ]; then
 			if [ "$smartgatewayuplink" = "ipv4" ]; then
 				# Allow everything to be forwarded to tnl_+ and use NAT for it
 				$IP4T -I forwarding_rule -o tnl_+ -j ACCEPT
 				$IP4T -t nat -I postrouting_rule -o tnl_+ -j MASQUERADE
 				# Allow forwarding from tunl0 to (all) wan-interfaces
 				if [ "$nowan" = '0' ]; then
 					for IFACE in $wanifnames; do
 						$IP4T -A forwarding_rule -i tunl0 -o $IFACE -j ACCEPT
 					done
 				fi
 				# Allow incoming ipip on all olsr-interfaces
 				for IFACE in $ifsglobal; do
 					$IP4T -I input_rule -i $IFACE -p 4 -j ACCEPT
 				done
 			elif [ "$smartgatewayuplink" = "ipv6" ]; then
 				$IP6T -I forwarding_rule -o tnl_+ -j ACCEPT
 				if [ "$nowan" = '0' ]; then
 					for IFACE in $wanifnames; do
 						$IP6T -A forwarding_rule -i tunl0 -o $IFACE -j ACCEPT
 					done
 				fi
 				for IFACE in $ifsglobal; do
 					$IP6T -I input_rule -i $IFACE -p 4 -j ACCEPT
 				done
 			else
 				$IP4T -t nat -I postrouting_rule -o tnl_+ -j MASQUERADE
 				for IPT in $IP4T $IP6T; do
 					$IPT -I forwarding_rule -o tnl_+ -j ACCEPT
 					if [ "$nowan" = '0' ]; then
 						for IFACE in $wanifnames; do
 							$IPT -A forwarding_rule -i tunl0 -o $IFACE -j ACCEPT
 						done
 					fi
 					for IFACE in $ifsglobal; do
 						$IPT -I input_rule -i $IFACE -p 4 -j ACCEPT
 					done
 				done
 			fi
 		fi
 	fi
 }

 olsrd_generate_config() {
 	UCI_CONF_NAME="$1"
 	SYSTEM_HOSTNAME=
 	SYSTEM_LAT=
 	SYSTEM_LON=
 	config_load system
 	config_foreach system_config system

 	option_cb() {
 		olsrd_update_schema "option" "$@"
 	}

 	list_cb() {
 		olsrd_update_schema "list" "$@"
 	}

 	. /lib/functions/network.sh

 	config_load $UCI_CONF_NAME
 	reset_cb

 	OLSRD_CONFIG_FILE=
 	config_foreach olsrd_find_config_file olsrd

 	if [ -z "$OLSRD_CONFIG_FILE" ]; then
 		mkdir -p -- /var/etc/
 		olsrd_write_config > /var/etc/$UCI_CONF_NAME.conf || return 1
 		if [ "$INTERFACES_COUNT" -gt 0 -a "$OLSRD_COUNT" -gt 0 ]; then
 			OLSRD_CONFIG_FILE=/var/etc/$UCI_CONF_NAME.conf
 		fi
 	fi

 	[ -z "$OLSRD_CONFIG_FILE" ] && return 1
 }
	#!/bin/sh /etc/rc.common
	# Copyright (C) 2008-2017 OpenWrt.org

	OLSRD_OLSRD_SCHEMA='ignore:internal config_file:internal DebugLevel=0 AllowNoInt=yes'
	OLSRD_IPCCONNECT_SCHEMA='ignore:internal Host:list Net:list2'
	OLSRD_LOADPLUGIN_SCHEMA='ignore:internal library:internal Host4:list Net4:list2 Host:list Net:list2 Host6:list Net6:list2 Ping:list redistribute:list NonOlsrIf:list name:list lat lon latlon_infile HNA:list2 hosts:list2 ipv6only:bool'
	OLSRD_INTERFACE_SCHEMA='ignore:internal interface:internal AutoDetectChanges:bool LinkQualityMult:list2'
	OLSRD_INTERFACE_DEFAULTS_SCHEMA='AutoDetectChanges:bool'

	T=' '
	N='
	'

	log() {
	logger -t olsrd -p daemon.info -s "${initscript}: $*"
	}

	error() {
	logger -t olsrd -p daemon.err -s "${initscript}: ERROR: $*"
	}

	warn() {
	logger -t olsrd -p daemon.warn -s "${initscript}: WARNING: $*"
	}

	validate_varname() {
	local varname="$1"
	[ -z "$varname" -o "$varname" != "${varname%%[!A-Za-z0-9_]*}" ] && return 1
	return 0
	}

	olsrd_list_configured_interfaces()
	{
	local i=0
	local interface

	while interface="$( uci -q get $OLSRD.@Interface[$i].interface )"; do {
	case "$( uci -q get $OLSRD.@Interface[$i].ignore )" in
	1\|on\|true\|enabled\|yes)
	# is disabled
	;;
	*)
	echo "$interface" # e.g. 'lan'
	;;
	esac

	i=$(( i + 1 ))
	} done
	}

	olsrd_interface_already_in_config()
	{
	# e.g.: 'Interface "eth0.1" "eth0.2" "wlan0"'
	if grep -s ^'Interface ' "/var/etc/$OLSRD.conf" \| grep -q "\"$DEVICE\""; then
	logger -t olsrd_hotplug -p daemon.debug "[OK] already_active: '$INTERFACE' => '$DEVICE'"
	return 0
	else
	logger -t olsrd_hotplug -p daemon.info "[OK] ifup: '$INTERFACE' => '$DEVICE'"
	return 1
	fi
	}

	olsrd_interface_needs_adding()
	{
	local interface

	# likely and cheap operation:
	olsrd_interface_already_in_config && return 1

	for interface in $(olsrd_list_configured_interfaces); do {
	[ "$interface" = "$INTERFACE" ] && {
	olsrd_interface_already_in_config \|\| return 0
	}
	} done

	logger -t olsrd_hotplug -p daemon.debug "[OK] interface '$INTERFACE' => '$DEVICE' not used for $OLSRD"
	return 1
	}

	validate_olsrd_option() {
	local str="$1"
	[ -z "$str" -o "$str" != "${str%%[! 0-9A-Za-z.%/\|:_-]*}" ] && return 1
	return 0
	}

	system_config() {
	local cfg="$1"
	local cfgt hostname latlon oldIFS

	config_get cfgt "$cfg" TYPE

	if [ "$cfgt" = "system" ]; then
	config_get hostname "$cfg" hostname
	hostname="${hostname:-OpenWrt}"
	SYSTEM_HOSTNAME="$hostname"
	fi

	if [ -z "$SYSTEM_LAT" -o -z "$SYSTEM_LON" ]; then
	config_get latlon "$cfg" latlon
	oldIFS="$IFS"; IFS=" ${T}${N},"; set -- $latlon; IFS="$oldIFS"
	SYSTEM_LAT="$1"
	SYSTEM_LON="$2"
	fi

	if [ -z "$SYSTEM_LAT" -o -z "$SYSTEM_LON" ]; then
	config_get latlon "$cfg" latitude
	SYSTEM_LAT="$latlon"
	config_get latlon "$cfg" longitude
	SYSTEM_LON="$latlon"
	fi
	}

	olsrd_find_config_file() {
	local cfg="$1"
	validate_varname "$cfg" \|\| return 0

	config_get_bool ignore "$cfg" ignore 0
	[ "$ignore" -ne 0 ] && return 0
	config_get OLSRD_CONFIG_FILE "$cfg" config_file

	return 0
	}

	warning_invalid_value() {
	local funcname="warning_invalid_value"
	local package="$1"
	validate_varname "$package" \|\| package=
	local config="$2"
	validate_varname "$config" \|\| config=
	local option="$3"
	validate_varname "$option" \|\| option=

	if [ -n "$package" -a -n "$config" ]; then
	log "$funcname() in option '$package.$config${option:+.}$option', skipped"
	else
	log "$funcname() skipped"
	fi

	return 0
	}

	olsrd_write_option() {
	local param="$1"
	local cfg="$2"
	validate_varname "$cfg" \|\| return 1
	local option="$3"
	validate_varname "$option" \|\| return 1
	local value="$4"
	local option_type="$5"

	if [ "$option_type" = bool ]; then
	case "$value" in
	1\|on\|true\|enabled\|yes) value=yes;;
	0\|off\|false\|disabled\|no) value=no;;
	*) warning_invalid_value olsrd "$cfg" "$option"; return 1;;
	esac
	fi

	if ! validate_olsrd_option "$value"; then
	warning_invalid_value olsrd "$cfg" "$option"
	return 1
	fi

	if [ "$value" != "${value%%[G-Zg-z_-]*}" ]; then
	if [ "$option" != "Ip6AddrType" -a "$option" != "LinkQualityMult" -a "$value" != "yes" -a "$value" != "no" ]; then
	value="\"$value\""
	fi
	fi

	printf '%s' "${N}$param$option $value"
	}

	olsrd_write_plparam() {
	local funcname="olsrd_write_plparam"
	local param="$1"
	local cfg="$2"
	local option="$3"
	local value="$4"
	local option_type="$5"
	local _option oldIFS

	validate_varname "$cfg" \|\| return 1
	validate_varname "$option" \|\| return 1

	if [ "$option_type" = bool ]; then
	case "$value" in
	1\|on\|true\|enabled\|yes) value=yes;;
	0\|off\|false\|disabled\|no) value=no;;
	*) warning_invalid_value olsrd "$cfg" "$option"; return 1;;
	esac
	fi

	if ! validate_olsrd_option "$value"; then
	warning_invalid_value olsrd "$cfg" "$option"
	return 1
	fi

	oldIFS="$IFS"
	IFS='-_'
	set -- $option
	option="$*"
	IFS="$oldIFS"
	_option="$option"

	if [ "$option" = 'hosts' ]; then
	set -- $value
	option="$1"
	shift
	value="$*"
	fi

	if [ "$option" = 'NonOlsrIf' ]; then
	if validate_varname "$value"; then
	if network_get_device ifname "$value"; then
	log "$funcname() Info: mdns Interface '$value' ifname '$ifname' found"
	else
	log "$funcname() Warning: mdns Interface '$value' not found, skipped"
	fi
	else
	warning_invalid_value olsrd "$cfg" "NonOlsrIf"
	fi

	[ -z "$ifname" ] \|\| value=$ifname
	fi

	printf '%s' "${N}${param}PlParam \"$option\" \"$value\""
	}

	config_update_schema() {
	local schema_varname="$1"
	local command="$2"
	local option="$3"
	local value="$4"
	local schema
	local cur_option

	validate_varname "$schema_varname" \|\| return 1
	validate_varname "$command" \|\| return 1
	validate_varname "$option" \|\| return 1

	case "$varname" in
	*_LENGTH) return 0;;
	_ITEM) return 0;;
	esac

	eval "export -n -- \"schema=\${$schema_varname}\""

	for cur_option in $schema; do
	[ "${cur_option%%[:=]*}" = "$option" ] && return 0
	done

	if [ "$command" = list ]; then
	set -- $value
	if [ "$#" -ge "3" ]; then
	schema_entry="$option:list3"
	elif [ "$#" -ge "2" ]; then
	schema_entry="$option:list2"
	else
	schema_entry="$option:list"
	fi
	else
	schema_entry="$option"
	fi

	append "$schema_varname" "$schema_entry"

	return 0
	}

	config_write_options() {
	local funcname="config_write_options"
	local schema="$1"
	local cfg="$2"
	validate_varname "$cfg" \|\| return 1
	local write_func="$3"
	[ -z "$write_func" ] && output_func=echo
	local write_param="$4"

	local schema_entry option option_length option_type default value list_size list_item list_value i position speed oldIFS
	local list_speed_vars="HelloInterval HelloValidityTime TcInterval TcValidityTime MidInterval MidValidityTime HnaInterval HnaValidityTime"

	get_value_for_entry()
	{
	local schema_entry="$1"

	default="${schema_entry#*[=]}"
	[ "$default" = "$schema_entry" ] && default=
	option="${schema_entry%%[=]*}"

	oldIFS="$IFS"; IFS=':'; set -- $option; IFS="$oldIFS"
	option="$1"
	option_type="$2"

	validate_varname "$option" \|\| return 1
	[ -z "$option_type" ] \|\| validate_varname "$option_type" \|\| return 1
	[ "$option_type" = internal ] && return 1

	config_get value "$cfg" "$option"
	[ "$option" = "speed" ] && return 1

	return 0
	}

	already_in_schema()
	{
	case " $schema " in
	" $1 ")
	return 0
	;;
	*)
	return 1
	;;
	esac
	}

	already_in_schema "speed" && {
	get_value_for_entry "speed"

	if test 2>/dev/null "$value" -gt 0 -a "$value" -le 20 ; then
	speed="$value"
	else
	log "$funcname() Warning: invalid speed-value: '$value' - allowed integers: 1...20, fallback to 6"
	speed=6
	fi

	for schema_entry in $list_speed_vars; do {
	already_in_schema "$schema_entry" \|\| schema="$schema $schema_entry"
	} done
	}

	for schema_entry in $schema; do
	if [ -n "$speed" ]; then # like sven-ola freifunk firmware fff-1.7.4
	case "$schema_entry" in
	HelloInterval)
	value="$(( speed / 2 + 1 )).0"
	;;
	HelloValidityTime)
	value="$(( speed * 25 )).0"
	;;
	TcInterval) # todo: not fisheye? -> $(( speed * 2 ))
	value=$(( speed / 2 ))
	[ $value -eq 0 ] && value=1
	value="$value.0"
	;;
	TcValidityTime)
	value="$(( speed * 100 )).0"
	;;
	MidInterval)
	value="$(( speed * 5 )).0"
	;;
	MidValidityTime)
	value="$(( speed * 100 )).0"
	;;
	HnaInterval)
	value="$(( speed * 2 )).0"
	;;
	HnaValidityTime)
	value="$(( speed * 25 )).0"
	;;
	*)
	get_value_for_entry "$schema_entry" \|\| continue
	;;
	esac

	is_speed_var()
	{
	case " $list_speed_vars " in
	" $1 ")
	return 0
	;;
	*)
	return 1
	;;
	esac
	}

	is_speed_var "$schema_entry" && option="$schema_entry"
	else
	get_value_for_entry "$schema_entry" \|\| continue
	fi

	if [ -z "$value" ]; then
	oldIFS="$IFS"; IFS='+'; set -- $default; IFS="$oldIFS"
	value=$*
	elif [ "$value" = '-' -a -n "$default" ]; then
	continue
	fi

	[ -z "$value" ] && continue

	case "$option_type" in
	list) list_size=1;;
	list2) list_size=2;;
	list3) list_size=3;;
	*) list_size=0;;
	esac

	if [ "$list_size" -gt 0 ]; then
	config_get option_length "$cfg" "${option}_LENGTH"
	if [ -n "$option_length" ]; then
	i=1
	while [ "$i" -le "$option_length" ]; do
	config_get list_value "$cfg" "${option}_ITEM$i"
	"$write_func" "$write_param" "$cfg" "$option" "$list_value" "$option_type" \|\| break
	i=$((i + 1))
	done
	else
	list_value=
	i=0
	for list_item in $value; do
	append "list_value" "$list_item"
	i=$((i + 1))
	position=$((i % list_size))
	if [ "$position" -eq 0 ]; then
	"$write_func" "$write_param" "$cfg" "$option" "$list_value" "$option_type" \|\| break
	list_value=
	fi
	done
	[ "$position" -ne 0 ] && "$write_func" "$write_param" "$cfg" "$option" "$list_value" "$option_type"
	fi
	else
	"$write_func" "$write_param" "$cfg" "$option" "$value" "$option_type"
	fi
	done

	return 0
	}

	olsrd_write_olsrd() {
	local cfg="$1"
	validate_varname "$cfg" \|\| return 0
	local ignore

	config_get_bool ignore "$cfg" ignore 0
	[ "$ignore" -ne 0 ] && return 0

	[ "$OLSRD_COUNT" -gt 0 ] && return 0

	config_get smartgateway "$cfg" SmartGateway
	config_get smartgatewayuplink "$cfg" SmartGatewayUplink
	export smartgateway
	export smartgatewayuplink

	config_write_options "$OLSRD_OLSRD_SCHEMA" "$cfg" olsrd_write_option
	echo
	OLSRD_COUNT=$((OLSRD_COUNT + 1))
	return 0
	}

	olsrd_write_ipcconnect() {
	local cfg="$1"
	validate_varname "$cfg" \|\| return 0
	local ignore

	config_get_bool ignore "$cfg" ignore 0
	[ "$ignore" -ne 0 ] && return 0

	[ "$IPCCONNECT_COUNT" -gt 0 ] && return 0

	printf '%s' "${N}IpcConnect${N}{"
	config_write_options "$OLSRD_IPCCONNECT_SCHEMA" "$cfg" olsrd_write_option "${T}"
	echo "${N}}"
	IPCCONNECT_COUNT=$((IPCCONNECT_COUNT + 1))
	}

	olsrd_write_hna4() {
	local cfg="$1"
	validate_varname "$cfg" \|\| return 0
	local ignore

	config_get_bool ignore "$cfg" ignore 0
	[ "$ignore" -ne 0 ] && return 0

	config_get netaddr "$cfg" netaddr
	if ! validate_olsrd_option "$netaddr"; then
	warning_invalid_value olsrd "$cfg" "netaddr"
	return 0
	fi

	config_get netmask "$cfg" netmask
	if ! validate_olsrd_option "$netmask"; then
	warning_invalid_value olsrd "$cfg" "netmask"
	return 0
	fi

	[ "$HNA4_COUNT" -le 0 ] && printf '%s' "${N}Hna4${N}{"
	printf '%s' "${N}${T}${T}$netaddr $netmask"
	HNA4_COUNT=$((HNA4_COUNT + 1))
	}

	olsrd_write_hna6() {
	local cfg="$1"
	validate_varname "$cfg" \|\| return 0
	local ignore

	config_get_bool ignore "$cfg" ignore 0
	[ "$ignore" -ne 0 ] && return 0

	config_get netaddr "$cfg" netaddr
	if ! validate_olsrd_option "$netaddr"; then
	warning_invalid_value olsrd "$cfg" "netaddr"
	return 0
	fi

	config_get prefix "$cfg" prefix
	if ! validate_olsrd_option "$prefix"; then
	warning_invalid_value olsrd "$cfg" "prefix"
	return 0
	fi

	[ "$HNA6_COUNT" -le 0 ] && printf '%s' "${N}Hna6${N}{"
	printf '%s' "${N}${T}${T}$netaddr $prefix"
	HNA6_COUNT=$((HNA6_COUNT + 1))
	}

	find_most_recent_plugin_libary()
	{
	local library="$1" # e.g. 'olsrd_dyn_gw' or 'olsrd_txtinfo.so.1.1'
	local file file_fullpath unixtime

	for file in "/lib/$library"* "/usr/lib/$library"* "/usr/local/lib/$library"*; do {
	[ -f "$file" ] && {
	file_fullpath="$file"
	file="$( basename "$file" )"
	# make sure that we do not select
	# 'olsrd_dyn_gw_plain.so.0.4' if user wants
	# 'olsrd_dyn_gw.so.0.5' -> compare part before 1st dot
	[ "${library%%.}" = "${file%%.}" ] && {
	unixtime="$( date +%s -r "$file_fullpath" )"
	echo "$unixtime $file"
	}
	}
	} done \| sort -n \| tail -n1 \| cut -d' ' -f2
	}

	olsrd_write_loadplugin()
	{
	local funcname='olsrd_write_loadplugin'
	local cfg="$1"
	local ignore name suffix lat lon latlon_infile

	validate_varname "$cfg" \|\| return 0

	config_get_bool ignore "$cfg" ignore 0
	[ "$ignore" -ne 0 ] && return 0

	# e.g. olsrd_txtinfo.so.1.1 or 'olsrd_txtinfo'
	config_get library "$cfg" library

	library="$( find_most_recent_plugin_libary "$library" )"
	if [ -z "$library" ]; then
	log "$funcname() Warning: Plugin library '$library' not found, skipped"
	return 0
	else
	library="$( basename "$library" )"
	fi

	validate_olsrd_option "$library" \|\| {
	warning_invalid_value olsrd "$cfg" 'library'
	return 0
	}

	case "$library" in
	'olsrd_nameservice.'*)
	config_get name "$cfg" name
	[ -z "$name" ] && config_set "$cfg" name $SYSTEM_HOSTNAME

	config_get suffix "$cfg" suffix
	[ -z "$suffix" ] && config_set "$cfg" suffix '.olsr'

	config_get lat "$cfg" lat
	config_get lon "$cfg" lon
	config_get latlon_infile "$cfg" latlon_infile
	if [ \( -z "$lat" -o -z "$lat" \) -a -z "$latlon_infile" ]; then
	if [ -f '/var/run/latlon.txt' ]; then
	config_set "$cfg" lat ''
	config_set "$cfg" lon ''
	config_set "$cfg" latlon_infile '/var/run/latlon.txt'
	else
	config_set "$cfg" lat "$SYSTEM_LAT"
	config_set "$cfg" lon "$SYSTEM_LON"
	fi
	fi

	for f in latlon_file hosts_file services_file resolv_file macs_file; do
	config_get $f "$cfg" $f
	done

	[ -z "$latlon_file" ] && config_set "$cfg" latlon_file '/var/run/latlon.js'
	;;
	'olsrd_watchdog.'*)
	config_get wd_file "$cfg" file
	;;
	esac

	printf '%s' "${N}LoadPlugin \"$library\"${N}{"
	config_write_options "$OLSRD_LOADPLUGIN_SCHEMA" "$cfg" olsrd_write_plparam "${T}"
	echo "${N}}"
	}

	olsrd_write_interface() {
	local funcname="olsrd_write_interface"
	local cfg="$1"
	validate_varname "$cfg" \|\| return 0
	local ignore
	local interfaces
	local interface
	local ifnames

	config_get_bool ignore "$cfg" ignore 0
	[ "$ignore" -ne 0 ] && return 0

	ifnames=
	config_get interfaces "$cfg" interface

	for interface in $interfaces; do
	if validate_varname "$interface"; then
	if network_get_device IFNAME "$interface"; then
	ifnames="$ifnames \"$IFNAME\""
	ifsglobal="$ifsglobal $IFNAME"
	elif network_get_physdev IFNAME "$interface"; then
	local proto="$(uci -q get network.${interface}.proto)"
	if [ "$proto" = "static" -o "$proto" = "none" ]; then
	ifnames="$ifnames \"$IFNAME\""
	ifsglobal="$ifsglobal $IFNAME"
	fi
	elif [[ "$(ip -details link show dev $interface)" == "wireguard" ]]; then
	# wireguard interface
	ifnames="$ifnames \"$interface\""
	ifsglobal="$ifsglobal $interface"
	else
	log "$funcname() Warning: Interface '$interface' not found, skipped"
	fi
	else
	warning_invalid_value olsrd "$cfg" "interface"
	fi
	done

	[ -z "$ifnames" ] && return 0

	printf '%s' "${N}Interface$ifnames${N}{"
	config_write_options "$OLSRD_INTERFACE_SCHEMA" "$cfg" olsrd_write_option "${T}"
	echo "${N}}"
	INTERFACES_COUNT=$((INTERFACES_COUNT + 1))
	}

	olsrd_write_interface_defaults() {
	local cfg="$1"
	validate_varname "$cfg" \|\| return 0

	printf '%s' "${N}InterfaceDefaults$ifnames${N}{"
	config_write_options "$OLSRD_INTERFACE_DEFAULTS_SCHEMA" "$cfg" olsrd_write_option "${T}"
	echo "${N}}"

	return 1
	}

	olsrd_update_schema() {
	local command="$1"
	local varname="$2"
	local value="$3"
	local cfg="$CONFIG_SECTION"
	local cfgt

	validate_varname "$command" \|\| return 0
	validate_varname "$varname" \|\| return 0

	config_get cfgt "$cfg" TYPE
	case "$cfgt" in
	olsrd) config_update_schema OLSRD_OLSRD_SCHEMA "$command" "$varname" "$value";;
	IpcConnect) config_update_schema OLSRD_IPCCONNECT_SCHEMA "$command" "$varname" "$value";;
	LoadPlugin) config_update_schema OLSRD_LOADPLUGIN_SCHEMA "$command" "$varname" "$value";;
	Interface) config_update_schema OLSRD_INTERFACE_SCHEMA "$command" "$varname" "$value";;
	InterfaceDefaults) config_update_schema OLSRD_INTERFACE_DEFAULTS_SCHEMA "$command" "$varname" "$value";;
	esac

	return 0
	}

	olsrd_write_config() {
	OLSRD_COUNT=0
	config_foreach olsrd_write_olsrd olsrd
	IPCCONNECT_COUNT=0
	config_foreach olsrd_write_ipcconnect IpcConnect
	HNA4_COUNT=0
	config_foreach olsrd_write_hna4 Hna4
	[ "$HNA4_COUNT" -gt 0 ] && echo "${N}}"
	HNA6_COUNT=0
	config_foreach olsrd_write_hna6 Hna6
	[ "$HNA6_COUNT" -gt 0 ] && echo "${N}}"
	config_foreach olsrd_write_loadplugin LoadPlugin
	INTERFACES_COUNT=0
	config_foreach olsrd_write_interface_defaults InterfaceDefaults
	config_foreach olsrd_write_interface Interface
	echo

	return 0
	}

	get_wan_ifnames()
	{
	local wanifnames word catch_next

	command -v ip >/dev/null \|\| return 1

	set -- $( ip route list exact 0.0.0.0/0 table all )
	for word in $*; do
	case "$word" in
	dev)
	catch_next="true"
	;;
	*)
	[ -n "$catch_next" ] && {
	case "$wanifnames" in
	" $word ")
	;;
	*)
	wanifnames="$wanifnames $word "
	;;
	esac

	catch_next=
	}
	;;
	esac
	done

	echo "$wanifnames"
	}

	olsrd_setup_smartgw_rules() {
	local funcname="olsrd_setup_smartgw_rules"
	local file=

	for file in /etc/modules.d/[0-9]*-ipip; do :; done
	[ -e "$file" ] \|\| {
	log "$funcname() Warning: kmod-ipip is missing. SmartGateway will not work until you install it."
	return 1
	}

	local wanifnames="$( get_wan_ifnames )"

	if [ -z "$wanifnames" ]; then
	nowan=1
	else
	nowan=0
	fi

	IP4T="$( command -v iptables )"
	IP6T="$( command -v ip6tables )"

	# Delete smartgw firewall rules first
	if [ "$UCI_CONF_NAME" = "olsrd6" ]; then
	while $IP6T -D forwarding_rule -o tnl_+ -j ACCEPT 2> /dev/null; do :;done
	for IFACE in $wanifnames; do
	while $IP6T -D forwarding_rule -i tunl0 -o $IFACE -j ACCEPT 2> /dev/null; do :; done
	done
	for IFACE in $ifsglobal; do
	while $IP6T -D input_rule -i $IFACE -p 4 -j ACCEPT 2> /dev/null; do :; done
	done
	else
	while $IP4T -D forwarding_rule -o tnl_+ -j ACCEPT 2> /dev/null; do :;done
	for IFACE in $wanifnames; do
	while $IP4T -D forwarding_rule -i tunl0 -o $IFACE -j ACCEPT 2> /dev/null; do :; done
	done
	for IFACE in $ifsglobal; do
	while $IP4T -D input_rule -i $IFACE -p 4 -j ACCEPT 2> /dev/null; do :; done
	done
	while $IP4T -t nat -D postrouting_rule -o tnl_+ -j MASQUERADE 2> /dev/null; do :;done
	fi

	# var 'smartgateway' + 'smartgatewayuplink' build in olsrd_write_olsrd()
	if [ "$smartgateway" = "yes" ]; then
	log "$funcname() Notice: Inserting firewall rules for SmartGateway"

	if [ ! "$smartgatewayuplink" = "none" ]; then
	if [ "$smartgatewayuplink" = "ipv4" ]; then
	# Allow everything to be forwarded to tnl_+ and use NAT for it
	$IP4T -I forwarding_rule -o tnl_+ -j ACCEPT
	$IP4T -t nat -I postrouting_rule -o tnl_+ -j MASQUERADE
	# Allow forwarding from tunl0 to (all) wan-interfaces
	if [ "$nowan" = '0' ]; then
	for IFACE in $wanifnames; do
	$IP4T -A forwarding_rule -i tunl0 -o $IFACE -j ACCEPT
	done
	fi
	# Allow incoming ipip on all olsr-interfaces
	for IFACE in $ifsglobal; do
	$IP4T -I input_rule -i $IFACE -p 4 -j ACCEPT
	done
	elif [ "$smartgatewayuplink" = "ipv6" ]; then
	$IP6T -I forwarding_rule -o tnl_+ -j ACCEPT
	if [ "$nowan" = '0' ]; then
	for IFACE in $wanifnames; do
	$IP6T -A forwarding_rule -i tunl0 -o $IFACE -j ACCEPT
	done
	fi
	for IFACE in $ifsglobal; do
	$IP6T -I input_rule -i $IFACE -p 4 -j ACCEPT
	done
	else
	$IP4T -t nat -I postrouting_rule -o tnl_+ -j MASQUERADE
	for IPT in $IP4T $IP6T; do
	$IPT -I forwarding_rule -o tnl_+ -j ACCEPT
	if [ "$nowan" = '0' ]; then
	for IFACE in $wanifnames; do
	$IPT -A forwarding_rule -i tunl0 -o $IFACE -j ACCEPT
	done
	fi
	for IFACE in $ifsglobal; do
	$IPT -I input_rule -i $IFACE -p 4 -j ACCEPT
	done
	done
	fi
	fi
	fi
	}

	olsrd_generate_config() {
	UCI_CONF_NAME="$1"
	SYSTEM_HOSTNAME=
	SYSTEM_LAT=
	SYSTEM_LON=
	config_load system
	config_foreach system_config system

	option_cb() {
	olsrd_update_schema "option" "$@"
	}

	list_cb() {
	olsrd_update_schema "list" "$@"
	}

	. /lib/functions/network.sh

	config_load $UCI_CONF_NAME
	reset_cb

	OLSRD_CONFIG_FILE=
	config_foreach olsrd_find_config_file olsrd

	if [ -z "$OLSRD_CONFIG_FILE" ]; then
	mkdir -p -- /var/etc/
	olsrd_write_config > /var/etc/$UCI_CONF_NAME.conf \|\| return 1
	if [ "$INTERFACES_COUNT" -gt 0 -a "$OLSRD_COUNT" -gt 0 ]; then
	OLSRD_CONFIG_FILE=/var/etc/$UCI_CONF_NAME.conf
	fi
	fi

	[ -z "$OLSRD_CONFIG_FILE" ] && return 1
	}