external/subpack/net/isc-dhcp/files/dhcpd.init - T108 - Gitiles

 #!/bin/sh /etc/rc.common

 START=25
 USE_PROCD=1
 PROG=/usr/sbin/dhcpd

 TTL=3600
 PREFIX="update add"

 lease_file=/tmp/dhcpd.leases
 config_file=/tmp/run/dhcpd.conf

 dyndir=/tmp/bind
 conf_local_file=$dyndir/named.conf.local

 session_key_name=local-ddns
 session_key_file=/var/run/named/session.key

 dyn_file=$(mktemp -u /tmp/dhcpd.XXXXXX)

 time2seconds() {
 	local timestring=$1
 	local multiplier number suffix

 	suffix="${timestring//[0-9 ]}"
 	number="${timestring%%$suffix}"
 	[ "$number$suffix" != "$timestring" ] && return 1
 	case "$suffix" in
 		"" | s)
 			multiplier=1
 			;;
 		m)
 			multiplier=60
 			;;
 		h)
 			multiplier=3600
 			;;
 		d)
 			multiplier=86400
 			;;
 		w)
 			multiplier=604800
 			;;
 		*)
 			return 1
 			;;
 	esac
 	echo $(( number * multiplier ))
 }

 # duplicated from dnsmasq init script
 hex_to_hostid() {
 	local var="$1"
 	local hex="${2#0x}" # strip optional "0x" prefix

 	if [ -n "${hex//[0-9a-fA-F]/}" ]; then
 		# is invalid hex literal
 		return 1
 	fi

 	# convert into host id
 	export "$var=$(
 		printf "%0x:%0x" \
 		$(((0x$hex >> 16) % 65536)) \
 		$(( 0x$hex        % 65536))
 		)"

 	return 0
 }

 typeof() {
 	echo "$1" | awk '
 /^\d+\.\d+\.\d+\.\d+$/		{ print "ip\n"; next; }
 /^(true|false)$/		{ print "bool\n"; next; }
 /^\d+$/				{ print "integer\n"; next; }
 /^"[^"]*"$/			{ print "string\n"; next; }
 /^[0-9a-fA-F]{2,2}(:[0-9a-fA-F]{2,2})*$/	{ print "string\n"; next; }
 				{ print "other\n"; next; }
 '
 }

 update() {
 	local lhs="$1" family="$2" type="$3"
 	shift 3

 	[ $dynamicdns -eq 1 ] && \
 		echo -e "$PREFIX" "$lhs $family $type $@\nsend" >> $dyn_file
 }

 explode() {
 	local arg="$1"

 	echo "$arg" | sed -e 's/\./, /g'
 }

 rev_str() {
 	local str="$1" delim="$2"
 	local frag result="" IFS="$delim"

 	for frag in $str; do
 		result="$frag${result:+$delim}$result"
 	done

 	echo "$result"
 }

 create_empty_zone() {
 	local zone="$1"

 	if [ ! -f $dyndir/db."$zone" ]; then
 		cp -p /etc/bind/db.empty $dyndir/db."$zone"
 		chmod g+w $dyndir/db."$zone"
 		chgrp bind $dyndir/db."$zone"
 	fi
 }

 append_routes() {
 	local tuple tuples="$1"
 	local string=

 	local IFS=','
 	for tuple in $tuples; do
 		local network prefix router save octets compacted

 		save="${tuple% *}"
 		router="${tuple#${save} }"

 		network="${save%/[0-9]*}"
 		prefix="${save##${network}}"
 		prefix="${prefix:1}"

 		octets=$((($prefix + 7) / 8))
 		compacted="$(echo "$network" | cut -d. -f1-$octets)"

 		string="${string:+, }$(explode "$prefix.$compacted.$router")"
 	done

 	echo " option classless-ipv4-route $string;"
 }

 append_dhcp_options() {
 	local tuple="$1"

 	# strip redundant "option:" prefix
 	tuple="${tuple#option:}"

 	local tag="${tuple%%,*}"
 	local values="${tuple#$tag,}"

 	local formatted value
 	local IFS=$', \n'
 	for value in $values; do
 		# detect type of $value and quote if necessary
 		case $(typeof "$value") in
 		ip|bool|integer|string)
 			;;
 		other)
 			value="\"$value\""
 			;;
 		esac
 		formatted="$formatted${formatted:+, }$value"
 	done
 	echo " option $tag $formatted;"
 }

 static_cname_add() {
 	local cfg="$1"
 	local cname target

 	config_get cname "$cfg" "cname"
 	[ -n "$cname" ] || return 0
 	config_get target "$cfg" "target"
 	[ -n "$target" ] || return 0

 	update "$cname.$domain." IN CNAME "$target.$domain."
 }

 static_cnames() {
 	config_foreach static_cname_add cname "$@"
 }

 static_domain_add() {
 	local cfg="$1"
 	local name ip ips revip

 	config_get name "$cfg" "name"
 	[ -n "$name" ] || return 0
 	config_get ip "$cfg" "ip"
 	[ -n "$ip" ] || return 0

 	ips="$ip"
 	for ip in $ips; do
 		revip="$(rev_str "$ip" ".")"

 		update "$name.$domain." IN A "$ip"
 		update "$revip.in-addr.arpa." IN PTR "$name.$domain."
 	done
 }

 static_domains() {
 	config_foreach static_domain_add domain "$@"
 }

 static_mxhost_add() {
 	local cfg="$1"
 	local domain2 relay pref

 	config_get domain2 "$cfg" "domain"
 	[ -n "$domain2" ] || return 0
 	config_get relay "$cfg" "relay"
 	[ -n "$relay" ] || return 0
 	config_get pref "$cfg" "pref"
 	[ -n "$pref" ] || return 0

 	if [ "$domain2" = "@" ]; then
 		update "$domain." IN MX "$pref" "$relay.$domain."
 	else
 		update "$domain2.$domain." IN MX "$pref" "$relay.$domain."
 	fi
 }

 static_mxhosts() {
 	config_foreach static_mxhost_add mxhost "$@"
 }

 static_srvhost_add() {
 	local cfg="$1"
 	local srv target port priority weight

 	config_get srv "$cfg" "srv"
 	[ -n "$srv" ] || return 0
 	config_get target "$cfg" "target"
 	[ -n "$target" ] || return 0
 	config_get port "$cfg" "port"
 	[ -n "$port" ] || return 0
 	config_get priority "$cfg" "priority"
 	[ -n "$priority" ] || return 0
 	config_get weight "$cfg" "weight"
 	[ -n "$weight" ] || return 0

 	update "$srv.$domain." IN SRV "$priority" "$weight" "$port" "$target"
 }

 static_srvhosts() {
 	config_foreach static_srvhost_add srvhost "$@"
 }

 static_host_add() {
 	local cfg="$1"
 	local broadcast hostid macn macs mac name ip ips revip leasetime

 	config_get macs "$cfg" "mac"
 	[ -n "$macs" ] || return 0
 	config_get name "$cfg" "name"
 	[ -n "$name" ] || return 0
 	config_get ip "$cfg" "ip"
 	[ -n "$ip" ] || return 0

 	config_get_bool broadcast "$cfg" "broadcast" 0
 	config_get dns "$cfg" "dns"
 	config_get gateway "$cfg" "gateway"
 	config_get leasetime "$cfg" "leasetime"
 	if [ -n "$leasetime" ] ; then
 		leasetime="$(time2seconds "$leasetime")"
 		[ "$?" -ne 0 ] && return 1
 	fi

 	config_get hostid "$cfg" "hostid"
 	if [ -n "$hostid" ] ; then
 		hex_to_hostid hostid "$hostid" || return 1
 	fi

 	macn=0
 	for mac in $macs; do
 		macn=$(( macn + 1 ))
 	done

 	for mac in $macs; do
 		local secname="$name"
 		if [ $macn -gt 1 ] ; then
 			secname="${name}-${mac//:}"
 		fi
 		echo "host $secname {"
 		echo " hardware ethernet $mac;"
 		echo " fixed-address $ip;"
 		echo " option host-name \"$name\";"
 		if [ "$broadcast" -eq 1 ] ; then
 			echo " always-broadcast true;"
 		fi
 		if [ -n "$leasetime" ] ; then
 			echo " default-lease-time $leasetime;"
 			echo " max-lease-time $leasetime;"
 		fi
 		if [ -n "$hostid" ] ; then
 			echo " option dhcp-client-identifier $hostid;"
 		fi
 		if [ -n "$dns" ] ; then
 			echo " option domain-name-servers $dns;"
 		fi
 		if [ -n "$gateway" ] ; then
 			echo " option routers $gateway;"
 		fi
 		config_list_foreach "$cfg" "routes" append_routes
 		config_list_foreach "$cfg" "dhcp_option" append_dhcp_options
 		echo "}"
 	done

 	ips="$ip"
 	for ip in $ips; do
 		revip="$(rev_str "$ip" ".")"

 		update "$name.$domain." IN A "$ip"
 		update "$revip.in-addr.arpa." IN PTR "$name.$domain."
 	done
 }

 static_hosts() {
 	config_foreach static_host_add host "$@"
 }

 gen_dhcp_subnet() {
 	local cfg="$1"

 	echo "subnet $NETWORK netmask $NETMASK {"
 	echo " range $START $END;"
 	echo " option subnet-mask $netmask;"
 	if [ "$BROADCAST" != "0.0.0.0" ] ; then
 		echo " option broadcast-address $BROADCAST;"
 	fi
 	if [ "$dynamicdhcp" -eq 0 ] ; then
 		if [ "$authoritative" -eq 1 ] ; then
 			echo " deny unknown-clients;"
 		else
 			echo " ignore unknown-clients;"
 		fi
 	fi
 	if [ -n "$leasetime" ] ; then
 		echo " default-lease-time $leasetime;"
 		echo " max-lease-time $leasetime;"
 	fi
 	echo " option routers $gateway;"
 	echo " option domain-name-servers $DNS;"
 	config_list_foreach "$cfg" "routes" append_routes
 	config_list_foreach "$cfg" "dhcp_option" append_dhcp_options
 	echo "}"
 }

 dhcpd_add() {
 	local cfg="$1" synthesize="$2"
 	local dhcp6range="::"
 	local dynamicdhcp end gateway ifname ignore leasetime limit net netmask
 	local proto networkid start subnet
 	local IP NETMASK BROADCAST NETWORK PREFIX DNS START END

 	config_get_bool ignore "$cfg" "ignore" 0
 	[ "$ignore" = "0" ] || return 0

 	config_get net "$cfg" "interface"
 	[ -n "$net" ] || return 0

 	config_get start "$cfg" "start"
 	[ -n "$start" ] || return 0

 	config_get limit "$cfg" "limit"
 	[ -n "$limit" ] || return 0

 	network_get_subnet subnet "$net" || return 0
 	network_get_device ifname "$net" || return 0
 	network_get_protocol proto "$net" || return 0

 	[ static = "$proto" ] || return 0

 	local pair="$(echo "${subnet%%/*}" | cut -d. -f1-2)"
 	case "$pair" in
 	10.*)
 		rfc1918_nets="$rfc1918_nets${rfc1918_nets:+ }10"
 		;;
 	172.1[6789]|172.2[0-9]|172.3[01]|192.168)
 		rfc1918_nets="$rfc1918_nets${rfc1918_nets:+ }$pair"
 		;;
 	esac
 	[ $synthesize -eq 0 ] && return

 	config_get_bool dynamicdhcp "$cfg" "dynamicdhcp" 1

 	dhcp_ifs="$dhcp_ifs $ifname"

 	eval "$(ipcalc.sh $subnet $start $limit)"

 	config_get netmask "$cfg" "netmask" "$NETMASK"
 	config_get leasetime "$cfg" "leasetime"
 	if [ -n "$leasetime" ] ; then
 		leasetime="$(time2seconds "$leasetime")"
 		[ "$?" -ne 0 ] && return 1
 	fi

 	if network_get_dnsserver dnsserver "$net" ; then
 		for dnsserv in $dnsserver ; do
 			DNS="$DNS${DNS:+, }$dnsserv"
 		done
 	else
 		DNS="$IP"
 	fi

 	if ! network_get_gateway gateway "$net" ; then
 		gateway="$IP"
 	fi

 	gen_dhcp_subnet "$cfg"
 }

 general_config() {
 	local always_broadcast boot_unknown_clients log_facility
 	local default_lease_time max_lease_time

 	config_get_bool always_broadcast "isc_dhcpd" "always_broadcast" 0
 	config_get_bool authoritative "isc_dhcpd" "authoritative" 1
 	config_get_bool boot_unknown_clients "isc_dhcpd" "boot_unknown_clients" 1
 	config_get default_lease_time "isc_dhcpd" "default_lease_time" 3600
 	config_get max_lease_time "isc_dhcpd" "max_lease_time" 86400
 	config_get log_facility "isc_dhcpd" "log_facility"

 	config_get domain "isc_dhcpd" "domain"
 	config_get_bool dynamicdns "isc_dhcpd" dynamicdns 0

 	[ $always_broadcast -eq 1 ] && echo "always-broadcast true;"
 	[ $authoritative -eq 1 ] && echo "authoritative;"
 	[ $boot_unknown_clients -eq 0 ] && echo "boot-unknown-clients false;"

 	default_lease_time="$(time2seconds "$default_lease_time")"
 	[ "$?" -ne 0 ] && return 1
 	max_lease_time="$(time2seconds "$max_lease_time")"
 	[ "$?" -ne 0 ] && return 1

 	if [ $dynamicdns -eq 1 ]; then
 		create_empty_zone "$domain"

 		local mynet

 		for mynet in $rfc1918_nets; do
 			mynet="$(rev_str "$mynet" ".")"
 			create_empty_zone "$mynet.in-addr.arpa"
 		done

 		cat <<EOF > $conf_local_file
 zone "$domain" {
   type master;
   file "$dyndir/db.$domain";
   allow-update { key $session_key_name; };
   allow-transfer { key $session_key_name; };
 };

 EOF

 		for mynet in $rfc1918_nets; do
 			mynet="$(rev_str "$mynet" ".")"
 			cat <<EOF >> $conf_local_file
 zone "$mynet.in-addr.arpa" {
   type master;
   file "$dyndir/db.$mynet.in-addr.arpa";
   allow-update { key $session_key_name; };
   allow-transfer { key $session_key_name; };
 };

 EOF
 		done

 		/etc/init.d/named reload
 		sleep 1

 		cat <<EOF
 ddns-domainname "$domain.";
 ddns-update-style standard;
 ddns-updates on;
 ignore client-updates;

 update-static-leases on;
 use-host-decl-names on;
 update-conflict-detection off;
 update-optimization off;

 include "$session_key_file";

 zone $domain. {
 	primary 127.0.0.1;
 	key local-ddns;
 }

 EOF

 		for mynet in $rfc1918_nets; do
 			mynet="$(rev_str "$mynet" ".")"
 			cat <<EOF
 zone $mynet.in-addr.arpa. {
 	primary 127.0.0.1;
 	key local-ddns;
 }

 EOF
 		done
 	fi

 	if [ -n "$log_facility" ] ; then
 		echo "log-facility $log_facility;"
 	fi
 	echo "default-lease-time $default_lease_time;"
 	echo "max-lease-time $max_lease_time;"

 	[ -n "$domain" ] && echo "option domain-name \"$domain\";"

 	echo -e "\n# additional codes\noption classless-ipv4-route code 121 = array of { unsigned integer 8 };\n"

 	rm -f /tmp/resolv.conf
 	echo "# This file is generated by the DHCPD service" > /tmp/resolv.conf
 	[ -n "$domain" ] && echo "domain $domain" >> /tmp/resolv.conf
 	echo "nameserver 127.0.0.1" >> /tmp/resolv.conf
 }

 # base procd hooks

 boot() {
 	DHCPD_BOOT=1
 	start "$@"
 }

 start_service() {
 	local domain dhcp_ifs authoritative dynamicdns

 	if [ -n "$DHCPD_BOOT" ] ; then
 		return 0
 	fi

 	if [ ! -e $lease_file ] ; then
 		touch $lease_file
 	fi

 	if [ -e "/etc/dhcpd.conf" ] ; then
 		config_file="/etc/dhcpd.conf"
 	else
 		. /lib/functions/network.sh

 		config_load dhcp

 		local rfc1918_nets=""

 		# alas we have to make 2 passes...
 		config_foreach dhcpd_add dhcp 0

 		rfc1918_nets="$(echo "$rfc1918_nets" | tr ' ' $'\n' | sort | uniq | tr $'\n' ' ')"

 		general_config > $config_file

 		if [ $dynamicdns -eq 1 ]; then
 			cat <<EOF > $dyn_file
 ; Generated by /etc/init.d/dhcpd at $(date)

 ttl $TTL

 EOF
 		fi

 		rfc1918_nets=

 		config_foreach dhcpd_add dhcp 1 >> $config_file

 		static_hosts >> $config_file

 		static_cnames >> $config_file

 		static_domains >> $config_file

 		static_mxhosts >> $config_file

 		static_srvhosts >> $config_file

 		if [ $dynamicdns -eq 1 ]; then
 			nsupdate -l -v $dyn_file

 			rm -f $dyn_file
 		fi

 		[ -z "$dhcp_ifs" ] && return 0
 	fi

 	procd_open_instance
 	procd_set_param command $PROG -q -f -cf $config_file -lf $lease_file $dhcp_ifs
 	procd_close_instance
 }

 reload_service() {
 	rc_procd start_service "$@"
 	procd_send_signal dhcpd "$@"
 }

 add_interface_trigger() {
 	local cfg=$1
 	local trigger ignore

 	config_get trigger "$cfg" interface
 	config_get_bool ignore "$cfg" ignore 0

 	if [ -n "$trigger" -a $ignore -eq 0 ] ; then
 		procd_add_reload_interface_trigger "$trigger"
 	fi
 }

 service_triggers() {
 	if [ -n "$DHCPD_BOOT" ] ; then
 		# Make the first start robust to slow interfaces; wait a while
 		procd_add_raw_trigger "interface.*.up" 5000 /etc/init.d/dhcpd restart

 	else
 		# reload with normal parameters
 		procd_add_reload_trigger "network" "dhcp"
 		config_load dhcp
 		config_foreach add_interface_trigger dhcp
 	fi
 }
	#!/bin/sh /etc/rc.common

	START=25
	USE_PROCD=1
	PROG=/usr/sbin/dhcpd

	TTL=3600
	PREFIX="update add"

	lease_file=/tmp/dhcpd.leases
	config_file=/tmp/run/dhcpd.conf

	dyndir=/tmp/bind
	conf_local_file=$dyndir/named.conf.local

	session_key_name=local-ddns
	session_key_file=/var/run/named/session.key

	dyn_file=$(mktemp -u /tmp/dhcpd.XXXXXX)

	time2seconds() {
	local timestring=$1
	local multiplier number suffix

	suffix="${timestring//[0-9 ]}"
	number="${timestring%%$suffix}"
	[ "$number$suffix" != "$timestring" ] && return 1
	case "$suffix" in
	"" \| s)
	multiplier=1
	;;
	m)
	multiplier=60
	;;
	h)
	multiplier=3600
	;;
	d)
	multiplier=86400
	;;
	w)
	multiplier=604800
	;;
	*)
	return 1
	;;
	esac
	echo $(( number * multiplier ))
	}

	# duplicated from dnsmasq init script
	hex_to_hostid() {
	local var="$1"
	local hex="${2#0x}" # strip optional "0x" prefix

	if [ -n "${hex//[0-9a-fA-F]/}" ]; then
	# is invalid hex literal
	return 1
	fi

	# convert into host id
	export "$var=$(
	printf "%0x:%0x" \
	$(((0x$hex >> 16) % 65536)) \
	$(( 0x$hex % 65536))
	)"

	return 0
	}

	typeof() {
	echo "$1" \| awk '
	/^\d+\.\d+\.\d+\.\d+$/ { print "ip\n"; next; }
	/^(true\|false)$/ { print "bool\n"; next; }
	/^\d+$/ { print "integer\n"; next; }
	/^"[^"]*"$/ { print "string\n"; next; }
	/^[0-9a-fA-F]{2,2}(:[0-9a-fA-F]{2,2})*$/ { print "string\n"; next; }
	{ print "other\n"; next; }
	'
	}

	update() {
	local lhs="$1" family="$2" type="$3"
	shift 3

	[ $dynamicdns -eq 1 ] && \
	echo -e "$PREFIX" "$lhs $family $type $@\nsend" >> $dyn_file
	}

	explode() {
	local arg="$1"

	echo "$arg" \| sed -e 's/\./, /g'
	}

	rev_str() {
	local str="$1" delim="$2"
	local frag result="" IFS="$delim"

	for frag in $str; do
	result="$frag${result:+$delim}$result"
	done

	echo "$result"
	}

	create_empty_zone() {
	local zone="$1"

	if [ ! -f $dyndir/db."$zone" ]; then
	cp -p /etc/bind/db.empty $dyndir/db."$zone"
	chmod g+w $dyndir/db."$zone"
	chgrp bind $dyndir/db."$zone"
	fi
	}

	append_routes() {
	local tuple tuples="$1"
	local string=

	local IFS=','
	for tuple in $tuples; do
	local network prefix router save octets compacted

	save="${tuple% *}"
	router="${tuple#${save} }"

	network="${save%/[0-9]*}"
	prefix="${save##${network}}"
	prefix="${prefix:1}"

	octets=$((($prefix + 7) / 8))
	compacted="$(echo "$network" \| cut -d. -f1-$octets)"

	string="${string:+, }$(explode "$prefix.$compacted.$router")"
	done

	echo " option classless-ipv4-route $string;"
	}

	append_dhcp_options() {
	local tuple="$1"

	# strip redundant "option:" prefix
	tuple="${tuple#option:}"

	local tag="${tuple%%,*}"
	local values="${tuple#$tag,}"

	local formatted value
	local IFS=$', \n'
	for value in $values; do
	# detect type of $value and quote if necessary
	case $(typeof "$value") in
	ip\|bool\|integer\|string)
	;;
	other)
	value="\"$value\""
	;;
	esac
	formatted="$formatted${formatted:+, }$value"
	done
	echo " option $tag $formatted;"
	}

	static_cname_add() {
	local cfg="$1"
	local cname target

	config_get cname "$cfg" "cname"
	[ -n "$cname" ] \|\| return 0
	config_get target "$cfg" "target"
	[ -n "$target" ] \|\| return 0

	update "$cname.$domain." IN CNAME "$target.$domain."
	}

	static_cnames() {
	config_foreach static_cname_add cname "$@"
	}

	static_domain_add() {
	local cfg="$1"
	local name ip ips revip

	config_get name "$cfg" "name"
	[ -n "$name" ] \|\| return 0
	config_get ip "$cfg" "ip"
	[ -n "$ip" ] \|\| return 0

	ips="$ip"
	for ip in $ips; do
	revip="$(rev_str "$ip" ".")"

	update "$name.$domain." IN A "$ip"
	update "$revip.in-addr.arpa." IN PTR "$name.$domain."
	done
	}

	static_domains() {
	config_foreach static_domain_add domain "$@"
	}

	static_mxhost_add() {
	local cfg="$1"
	local domain2 relay pref

	config_get domain2 "$cfg" "domain"
	[ -n "$domain2" ] \|\| return 0
	config_get relay "$cfg" "relay"
	[ -n "$relay" ] \|\| return 0
	config_get pref "$cfg" "pref"
	[ -n "$pref" ] \|\| return 0

	if [ "$domain2" = "@" ]; then
	update "$domain." IN MX "$pref" "$relay.$domain."
	else
	update "$domain2.$domain." IN MX "$pref" "$relay.$domain."
	fi
	}

	static_mxhosts() {
	config_foreach static_mxhost_add mxhost "$@"
	}

	static_srvhost_add() {
	local cfg="$1"
	local srv target port priority weight

	config_get srv "$cfg" "srv"
	[ -n "$srv" ] \|\| return 0
	config_get target "$cfg" "target"
	[ -n "$target" ] \|\| return 0
	config_get port "$cfg" "port"
	[ -n "$port" ] \|\| return 0
	config_get priority "$cfg" "priority"
	[ -n "$priority" ] \|\| return 0
	config_get weight "$cfg" "weight"
	[ -n "$weight" ] \|\| return 0

	update "$srv.$domain." IN SRV "$priority" "$weight" "$port" "$target"
	}

	static_srvhosts() {
	config_foreach static_srvhost_add srvhost "$@"
	}

	static_host_add() {
	local cfg="$1"
	local broadcast hostid macn macs mac name ip ips revip leasetime

	config_get macs "$cfg" "mac"
	[ -n "$macs" ] \|\| return 0
	config_get name "$cfg" "name"
	[ -n "$name" ] \|\| return 0
	config_get ip "$cfg" "ip"
	[ -n "$ip" ] \|\| return 0

	config_get_bool broadcast "$cfg" "broadcast" 0
	config_get dns "$cfg" "dns"
	config_get gateway "$cfg" "gateway"
	config_get leasetime "$cfg" "leasetime"
	if [ -n "$leasetime" ] ; then
	leasetime="$(time2seconds "$leasetime")"
	[ "$?" -ne 0 ] && return 1
	fi

	config_get hostid "$cfg" "hostid"
	if [ -n "$hostid" ] ; then
	hex_to_hostid hostid "$hostid" \|\| return 1
	fi

	macn=0
	for mac in $macs; do
	macn=$(( macn + 1 ))
	done

	for mac in $macs; do
	local secname="$name"
	if [ $macn -gt 1 ] ; then
	secname="${name}-${mac//:}"
	fi
	echo "host $secname {"
	echo " hardware ethernet $mac;"
	echo " fixed-address $ip;"
	echo " option host-name \"$name\";"
	if [ "$broadcast" -eq 1 ] ; then
	echo " always-broadcast true;"
	fi
	if [ -n "$leasetime" ] ; then
	echo " default-lease-time $leasetime;"
	echo " max-lease-time $leasetime;"
	fi
	if [ -n "$hostid" ] ; then
	echo " option dhcp-client-identifier $hostid;"
	fi
	if [ -n "$dns" ] ; then
	echo " option domain-name-servers $dns;"
	fi
	if [ -n "$gateway" ] ; then
	echo " option routers $gateway;"
	fi
	config_list_foreach "$cfg" "routes" append_routes
	config_list_foreach "$cfg" "dhcp_option" append_dhcp_options
	echo "}"
	done

	ips="$ip"
	for ip in $ips; do
	revip="$(rev_str "$ip" ".")"

	update "$name.$domain." IN A "$ip"
	update "$revip.in-addr.arpa." IN PTR "$name.$domain."
	done
	}

	static_hosts() {
	config_foreach static_host_add host "$@"
	}

	gen_dhcp_subnet() {
	local cfg="$1"

	echo "subnet $NETWORK netmask $NETMASK {"
	echo " range $START $END;"
	echo " option subnet-mask $netmask;"
	if [ "$BROADCAST" != "0.0.0.0" ] ; then
	echo " option broadcast-address $BROADCAST;"
	fi
	if [ "$dynamicdhcp" -eq 0 ] ; then
	if [ "$authoritative" -eq 1 ] ; then
	echo " deny unknown-clients;"
	else
	echo " ignore unknown-clients;"
	fi
	fi
	if [ -n "$leasetime" ] ; then
	echo " default-lease-time $leasetime;"
	echo " max-lease-time $leasetime;"
	fi
	echo " option routers $gateway;"
	echo " option domain-name-servers $DNS;"
	config_list_foreach "$cfg" "routes" append_routes
	config_list_foreach "$cfg" "dhcp_option" append_dhcp_options
	echo "}"
	}

	dhcpd_add() {
	local cfg="$1" synthesize="$2"
	local dhcp6range="::"
	local dynamicdhcp end gateway ifname ignore leasetime limit net netmask
	local proto networkid start subnet
	local IP NETMASK BROADCAST NETWORK PREFIX DNS START END

	config_get_bool ignore "$cfg" "ignore" 0
	[ "$ignore" = "0" ] \|\| return 0

	config_get net "$cfg" "interface"
	[ -n "$net" ] \|\| return 0

	config_get start "$cfg" "start"
	[ -n "$start" ] \|\| return 0

	config_get limit "$cfg" "limit"
	[ -n "$limit" ] \|\| return 0

	network_get_subnet subnet "$net" \|\| return 0
	network_get_device ifname "$net" \|\| return 0
	network_get_protocol proto "$net" \|\| return 0

	[ static = "$proto" ] \|\| return 0

	local pair="$(echo "${subnet%%/*}" \| cut -d. -f1-2)"
	case "$pair" in
	10.*)
	rfc1918_nets="$rfc1918_nets${rfc1918_nets:+ }10"
	;;
	172.1[6789]\|172.2[0-9]\|172.3[01]\|192.168)
	rfc1918_nets="$rfc1918_nets${rfc1918_nets:+ }$pair"
	;;
	esac
	[ $synthesize -eq 0 ] && return

	config_get_bool dynamicdhcp "$cfg" "dynamicdhcp" 1

	dhcp_ifs="$dhcp_ifs $ifname"

	eval "$(ipcalc.sh $subnet $start $limit)"

	config_get netmask "$cfg" "netmask" "$NETMASK"
	config_get leasetime "$cfg" "leasetime"
	if [ -n "$leasetime" ] ; then
	leasetime="$(time2seconds "$leasetime")"
	[ "$?" -ne 0 ] && return 1
	fi

	if network_get_dnsserver dnsserver "$net" ; then
	for dnsserv in $dnsserver ; do
	DNS="$DNS${DNS:+, }$dnsserv"
	done
	else
	DNS="$IP"
	fi

	if ! network_get_gateway gateway "$net" ; then
	gateway="$IP"
	fi

	gen_dhcp_subnet "$cfg"
	}

	general_config() {
	local always_broadcast boot_unknown_clients log_facility
	local default_lease_time max_lease_time

	config_get_bool always_broadcast "isc_dhcpd" "always_broadcast" 0
	config_get_bool authoritative "isc_dhcpd" "authoritative" 1
	config_get_bool boot_unknown_clients "isc_dhcpd" "boot_unknown_clients" 1
	config_get default_lease_time "isc_dhcpd" "default_lease_time" 3600
	config_get max_lease_time "isc_dhcpd" "max_lease_time" 86400
	config_get log_facility "isc_dhcpd" "log_facility"

	config_get domain "isc_dhcpd" "domain"
	config_get_bool dynamicdns "isc_dhcpd" dynamicdns 0

	[ $always_broadcast -eq 1 ] && echo "always-broadcast true;"
	[ $authoritative -eq 1 ] && echo "authoritative;"
	[ $boot_unknown_clients -eq 0 ] && echo "boot-unknown-clients false;"

	default_lease_time="$(time2seconds "$default_lease_time")"
	[ "$?" -ne 0 ] && return 1
	max_lease_time="$(time2seconds "$max_lease_time")"
	[ "$?" -ne 0 ] && return 1

	if [ $dynamicdns -eq 1 ]; then
	create_empty_zone "$domain"

	local mynet

	for mynet in $rfc1918_nets; do
	mynet="$(rev_str "$mynet" ".")"
	create_empty_zone "$mynet.in-addr.arpa"
	done

	cat <<EOF > $conf_local_file
	zone "$domain" {
	type master;
	file "$dyndir/db.$domain";
	allow-update { key $session_key_name; };
	allow-transfer { key $session_key_name; };
	};

	EOF

	for mynet in $rfc1918_nets; do
	mynet="$(rev_str "$mynet" ".")"
	cat <<EOF >> $conf_local_file
	zone "$mynet.in-addr.arpa" {
	type master;
	file "$dyndir/db.$mynet.in-addr.arpa";
	allow-update { key $session_key_name; };
	allow-transfer { key $session_key_name; };
	};

	EOF
	done

	/etc/init.d/named reload
	sleep 1

	cat <<EOF
	ddns-domainname "$domain.";
	ddns-update-style standard;
	ddns-updates on;
	ignore client-updates;

	update-static-leases on;
	use-host-decl-names on;
	update-conflict-detection off;
	update-optimization off;

	include "$session_key_file";

	zone $domain. {
	primary 127.0.0.1;
	key local-ddns;
	}

	EOF

	for mynet in $rfc1918_nets; do
	mynet="$(rev_str "$mynet" ".")"
	cat <<EOF
	zone $mynet.in-addr.arpa. {
	primary 127.0.0.1;
	key local-ddns;
	}

	EOF
	done
	fi

	if [ -n "$log_facility" ] ; then
	echo "log-facility $log_facility;"
	fi
	echo "default-lease-time $default_lease_time;"
	echo "max-lease-time $max_lease_time;"

	[ -n "$domain" ] && echo "option domain-name \"$domain\";"

	echo -e "\n# additional codes\noption classless-ipv4-route code 121 = array of { unsigned integer 8 };\n"

	rm -f /tmp/resolv.conf
	echo "# This file is generated by the DHCPD service" > /tmp/resolv.conf
	[ -n "$domain" ] && echo "domain $domain" >> /tmp/resolv.conf
	echo "nameserver 127.0.0.1" >> /tmp/resolv.conf
	}

	# base procd hooks

	boot() {
	DHCPD_BOOT=1
	start "$@"
	}

	start_service() {
	local domain dhcp_ifs authoritative dynamicdns

	if [ -n "$DHCPD_BOOT" ] ; then
	return 0
	fi

	if [ ! -e $lease_file ] ; then
	touch $lease_file
	fi

	if [ -e "/etc/dhcpd.conf" ] ; then
	config_file="/etc/dhcpd.conf"
	else
	. /lib/functions/network.sh

	config_load dhcp

	local rfc1918_nets=""

	# alas we have to make 2 passes...
	config_foreach dhcpd_add dhcp 0

	rfc1918_nets="$(echo "$rfc1918_nets" \| tr ' ' $'\n' \| sort \| uniq \| tr $'\n' ' ')"

	general_config > $config_file

	if [ $dynamicdns -eq 1 ]; then
	cat <<EOF > $dyn_file
	; Generated by /etc/init.d/dhcpd at $(date)

	ttl $TTL

	EOF
	fi

	rfc1918_nets=

	config_foreach dhcpd_add dhcp 1 >> $config_file

	static_hosts >> $config_file

	static_cnames >> $config_file

	static_domains >> $config_file

	static_mxhosts >> $config_file

	static_srvhosts >> $config_file

	if [ $dynamicdns -eq 1 ]; then
	nsupdate -l -v $dyn_file

	rm -f $dyn_file
	fi

	[ -z "$dhcp_ifs" ] && return 0
	fi

	procd_open_instance
	procd_set_param command $PROG -q -f -cf $config_file -lf $lease_file $dhcp_ifs
	procd_close_instance
	}

	reload_service() {
	rc_procd start_service "$@"
	procd_send_signal dhcpd "$@"
	}

	add_interface_trigger() {
	local cfg=$1
	local trigger ignore

	config_get trigger "$cfg" interface
	config_get_bool ignore "$cfg" ignore 0

	if [ -n "$trigger" -a $ignore -eq 0 ] ; then
	procd_add_reload_interface_trigger "$trigger"
	fi
	}

	service_triggers() {
	if [ -n "$DHCPD_BOOT" ] ; then
	# Make the first start robust to slow interfaces; wait a while
	procd_add_raw_trigger "interface.*.up" 5000 /etc/init.d/dhcpd restart

	else
	# reload with normal parameters
	procd_add_reload_trigger "network" "dhcp"
	config_load dhcp
	config_foreach add_interface_trigger dhcp
	fi
	}