OpenWrt – Rev 3
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#!/bin/sh /etc/rc.common
# Copyright (C) 2007-2012 OpenWrt.org
START=19
USE_PROCD=1
PROG=/usr/sbin/dnsmasq
ADD_LOCAL_DOMAIN=1
ADD_LOCAL_HOSTNAME=1
ADD_WAN_FQDN=0
ADD_LOCAL_FQDN=""
BASECONFIGFILE="/var/etc/dnsmasq.conf"
BASEHOSTFILE="/tmp/hosts/dhcp"
TRUSTANCHORSFILE="/usr/share/dnsmasq/trust-anchors.conf"
TIMEVALIDFILE="/var/state/dnsmasqsec"
BASEDHCPSTAMPFILE="/var/run/dnsmasq"
RFC6761FILE="/usr/share/dnsmasq/rfc6761.conf"
DHCPSCRIPT="/usr/lib/dnsmasq/dhcp-script.sh"
DNSMASQ_DHCP_VER=4
xappend() {
local value="$1"
echo "${value#--}" >> $CONFIGFILE_TMP
}
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
}
dhcp_calc() {
local ip="$1"
local res=0
while [ -n "$ip" ]; do
part="${ip%%.*}"
res="$(($res * 256))"
res="$(($res + $part))"
[ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
done
echo "$res"
}
dhcp_check() {
local ifname="$1"
local stamp="${BASEDHCPSTAMPFILE_CFG}.${ifname}.dhcp"
local rv=0
[ -s "$stamp" ] && return $(cat "$stamp")
# If there's no carrier yet, skip this interface.
# The init script will be called again once the link is up
case "$(devstatus "$ifname" | jsonfilter -e @.carrier)" in
false) return 1;;
esac
udhcpc -n -q -s /bin/true -t 1 -i "$ifname" >&- && rv=1 || rv=0
[ $rv -eq 1 ] && \
logger -t dnsmasq \
"found already running DHCP-server on interface '$ifname'" \
"refusing to start, use 'option force 1' to override"
echo $rv > "$stamp"
return $rv
}
log_once() {
pidof dnsmasq >/dev/null || \
logger -t dnsmasq "$@"
}
has_handler() {
local file
for file in /etc/hotplug.d/dhcp/* /etc/hotplug.d/tftp/* /etc/hotplug.d/neigh/*; do
[ -f "$file" ] && return 0
done
return 1
}
append_bool() {
local section="$1"
local option="$2"
local value="$3"
local default="$4"
local _loctmp
[ -z "$default" ] && default="0"
config_get_bool _loctmp "$section" "$option" "$default"
[ $_loctmp -gt 0 ] && xappend "$value"
}
append_parm() {
local section="$1"
local option="$2"
local switch="$3"
local default="$4"
local _loctmp
config_get _loctmp "$section" "$option" "$default"
[ -z "$_loctmp" ] && return 0
xappend "$switch=$_loctmp"
}
append_server() {
xappend "--server=$1"
}
append_rev_server() {
xappend "--rev-server=$1"
}
append_address() {
xappend "--address=$1"
}
append_ipset() {
xappend "--ipset=$1"
}
append_interface() {
network_get_device ifname "$1" || ifname="$1"
xappend "--interface=$ifname"
}
append_listenaddress() {
xappend "--listen-address=$1"
}
append_notinterface() {
network_get_device ifname "$1" || ifname="$1"
xappend "--except-interface=$ifname"
}
append_addnhosts() {
xappend "--addn-hosts=$1"
}
append_bogusnxdomain() {
xappend "--bogus-nxdomain=$1"
}
append_pxe_service() {
xappend "--pxe-service=$1"
}
append_interface_name() {
xappend "--interface-name=$1,$2"
}
filter_dnsmasq() {
local cfg="$1" func="$2" match_cfg="$3" found_cfg
# use entry when no instance entry set, or if it matches
config_get found_cfg "$cfg" "instance"
if [ -z "$found_cfg" -o "$found_cfg" = "$match_cfg" ]; then
$func $cfg
fi
}
dhcp_subscrid_add() {
local cfg="$1"
config_get networkid "$cfg" networkid
[ -n "$networkid" ] || return 0
config_get subscriberid "$cfg" subscriberid
[ -n "$subscriberid" ] || return 0
xappend "--dhcp-subscrid=$networkid,$subscriberid"
config_get_bool force "$cfg" force 0
dhcp_option_add "$cfg" "$networkid" "$force"
}
dhcp_remoteid_add() {
local cfg="$1"
config_get networkid "$cfg" networkid
[ -n "$networkid" ] || return 0
config_get remoteid "$cfg" remoteid
[ -n "$remoteid" ] || return 0
xappend "--dhcp-remoteid=$networkid,$remoteid"
config_get_bool force "$cfg" force 0
dhcp_option_add "$cfg" "$networkid" "$force"
}
dhcp_circuitid_add() {
# TODO: DHCPV6 does not have circuitid; catch "option6:"
local cfg="$1"
config_get networkid "$cfg" networkid
[ -n "$networkid" ] || return 0
config_get circuitid "$cfg" circuitid
[ -n "$circuitid" ] || return 0
xappend "--dhcp-circuitid=$networkid,$circuitid"
config_get_bool force "$cfg" force 0
dhcp_option_add "$cfg" "$networkid" "$force"
}
dhcp_userclass_add() {
local cfg="$1"
config_get networkid "$cfg" networkid
[ -n "$networkid" ] || return 0
config_get userclass "$cfg" userclass
[ -n "$userclass" ] || return 0
xappend "--dhcp-userclass=$networkid,$userclass"
config_get_bool force "$cfg" force 0
dhcp_option_add "$cfg" "$networkid" "$force"
}
dhcp_vendorclass_add() {
# TODO: DHCPV6 vendor class has stricter definitions; catch? fixup?
local cfg="$1"
config_get networkid "$cfg" networkid
[ -n "$networkid" ] || return 0
config_get vendorclass "$cfg" vendorclass
[ -n "$vendorclass" ] || return 0
xappend "--dhcp-vendorclass=$networkid,$vendorclass"
config_get_bool force "$cfg" force 0
dhcp_option_add "$cfg" "$networkid" "$force"
}
dhcp_match_add() {
local cfg="$1"
config_get networkid "$cfg" networkid
[ -n "$networkid" ] || return 0
config_get match "$cfg" match
[ -n "$match" ] || return 0
xappend "--dhcp-match=$networkid,$match"
config_get_bool force "$cfg" force 0
dhcp_option_add "$cfg" "$networkid" "$force"
}
dhcp_host_add() {
local cfg="$1"
local hosttag nametime addrs duids macs tags
config_get_bool force "$cfg" force 0
config_get networkid "$cfg" networkid
[ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
config_get_bool enable "$cfg" enable 1
[ "$enable" = "0" ] && return 0
config_get name "$cfg" name
config_get ip "$cfg" ip
config_get hostid "$cfg" hostid
[ -n "$ip" -o -n "$name" -o -n "$hostid" ] || return 0
config_get_bool dns "$cfg" dns 0
[ "$dns" = "1" -a -n "$ip" -a -n "$name" ] && {
echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE_TMP
}
config_get mac "$cfg" mac
config_get duid "$cfg" duid
config_get tag "$cfg" tag
if [ -n "$mac" ]; then
# --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
# many MAC are possible to track a laptop ON/OFF dock
for m in $mac; do append macs "$m" ","; done
fi
if [ $DNSMASQ_DHCP_VER -eq 6 -a -n "$duid" ]; then
# --dhcp-host=id:00:03:00:01:12:00:00:01:02:03,[::beef],lap
# one (virtual) machine gets one DUID per RFC3315
duids="id:${duid// */}"
fi
if [ -z "$macs" -a -z "$duids" ]; then
# --dhcp-host=lap,192.168.0.199,[::beef]
[ -n "$name" ] || return 0
macs="$name"
name=""
fi
if [ -n "$hostid" ]; then
hex_to_hostid hostid "$hostid"
fi
if [ -n "$tag" ]; then
for t in $tag; do append tags "$t" ",set:"; done
fi
config_get_bool broadcast "$cfg" broadcast 0
config_get leasetime "$cfg" leasetime
[ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
hosttag="${networkid:+,set:${networkid}}${tags:+,set:${tags}}$broadcast"
nametime="${name:+,$name}${leasetime:+,$leasetime}"
if [ $DNSMASQ_DHCP_VER -eq 6 ]; then
addrs="${ip:+,$ip}${hostid:+,[::$hostid]}"
xappend "--dhcp-host=$macs${duids:+,$duids}$hosttag$addrs$nametime"
else
xappend "--dhcp-host=$macs$hosttag${ip:+,$ip}$nametime"
fi
}
dhcp_this_host_add() {
local net="$1"
local ifname="$2"
local mode="$3"
local routerstub routername ifdashname
local lanaddr lanaddr6 lanaddrs6 ulaprefix
if [ "$mode" -gt 0 ] ; then
ifdashname="${ifname//./-}"
routerstub="$( md5sum /etc/os-release )"
routerstub="router-${routerstub// */}"
routername="$( uci_get system @system[0] hostname $routerstub )"
if [ "$mode" -gt 1 ] ; then
if [ "$mode" -gt 2 ] ; then
if [ "$mode" -gt 3 ] ; then
append_interface_name "$ifdashname.$routername.$DOMAIN" "$ifname"
fi
append_interface_name "$routername.$DOMAIN" "$ifname"
fi
# All IP addresses discovered by dnsmasq will be labeled (except fe80::)
append_interface_name "$routername" "$ifname"
else
# This uses a static host file entry for only limited addresses.
# Use dnsmasq option "--expandhosts" to enable FQDN on host files.
ulaprefix="$(uci_get network @globals[0] ula_prefix)"
network_get_ipaddr lanaddr "$net"
network_get_ipaddrs6 lanaddrs6 "$net"
if [ -n "$lanaddr" ] ; then
dhcp_domain_add "" "$routername" "$lanaddr"
fi
if [ -n "$ulaprefix" -a -n "$lanaddrs6" ] ; then
for lanaddr6 in $lanaddrs6 ; do
case "$lanaddr6" in
"${ulaprefix%%:/*}"*)
dhcp_domain_add "" "$routername" "$lanaddr6"
;;
esac
done
fi
fi
fi
}
dhcp_tag_add() {
# NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
local cfg="$1"
tag="$cfg"
[ -n "$tag" ] || return 0
config_get_bool force "$cfg" force 0
[ "$force" = "0" ] && force=
config_get option "$cfg" dhcp_option
for o in $option; do
xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
done
}
dhcp_mac_add() {
local cfg="$1"
config_get networkid "$cfg" networkid
[ -n "$networkid" ] || return 0
config_get mac "$cfg" mac
[ -n "$mac" ] || return 0
xappend "--dhcp-mac=$networkid,$mac"
dhcp_option_add "$cfg" "$networkid"
}
dhcp_boot_add() {
# TODO: BOOTURL is different between DHCPv4 and DHCPv6
local cfg="$1"
config_get networkid "$cfg" networkid
config_get filename "$cfg" filename
[ -n "$filename" ] || return 0
config_get servername "$cfg" servername
config_get serveraddress "$cfg" serveraddress
[ -n "$serveraddress" -a ! -n "$servername" ] && return 0
xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
config_get_bool force "$cfg" force 0
dhcp_option_add "$cfg" "$networkid" "$force"
}
dhcp_add() {
local cfg="$1"
local dhcp6range="::"
local nettag
local tags
config_get net "$cfg" interface
[ -n "$net" ] || return 0
config_get networkid "$cfg" networkid
[ -n "$networkid" ] || networkid="$net"
network_get_device ifname "$net" || return 0
[ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
DNS_SERVERS="$DNS_SERVERS $dnsserver"
}
append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && {
# Many ISP do not have useful names for DHCP customers (your WAN).
dhcp_this_host_add "$net" "$ifname" "$ADD_WAN_FQDN"
return 0
}
network_get_subnet subnet "$net" || return 0
network_get_protocol proto "$net" || return 0
# Do not support non-static interfaces for now
[ static = "$proto" ] || return 0
# Override interface netmask with dhcp config if applicable
config_get netmask "$cfg" netmask "${subnet##*/}"
#check for an already active dhcp server on the interface, unless 'force' is set
config_get_bool force "$cfg" force 0
[ $force -gt 0 ] || dhcp_check "$ifname" || return 0
config_get start "$cfg" start 100
config_get limit "$cfg" limit 150
config_get leasetime "$cfg" leasetime 12h
config_get options "$cfg" options
config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
config_get dhcpv4 "$cfg" dhcpv4
config_get dhcpv6 "$cfg" dhcpv6
config_get ra "$cfg" ra
config_get ra_management "$cfg" ra_management
config_get ra_preference "$cfg" ra_preference
config_get dns "$cfg" dns
config_list_foreach "$cfg" "interface_name" append_interface_name "$ifname"
# Put the router host name on this DHCP served interface address(es)
dhcp_this_host_add "$net" "$ifname" "$ADD_LOCAL_FQDN"
start="$( dhcp_calc "$start" )"
add_tag() {
tags="${tags}tag:$1,"
}
config_list_foreach "$cfg" tag add_tag
nettag="${networkid:+set:${networkid},}"
if [ "$limit" -gt 0 ] ; then
limit=$((limit-1))
fi
eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
if [ "$dynamicdhcp" = "0" ] ; then
END="static"
dhcp6range="::,static"
else
dhcp6range="::1000,::ffff"
fi
if [ "$dhcpv4" != "disabled" ] ; then
xappend "--dhcp-range=$tags$nettag$START,$END,$NETMASK,$leasetime${options:+ $options}"
fi
if [ $DNSMASQ_DHCP_VER -eq 6 -a "$ra" = "server" ] ; then
# Note: dnsmasq cannot just be a DHCPv6 server (all-in-1)
# and let some other machine(s) send RA pointing to it.
case $ra_preference in
*high*)
xappend "--ra-param=$ifname,high,0,7200"
;;
*low*)
xappend "--ra-param=$ifname,low,0,7200"
;;
*)
# Send UNSOLICITED RA at default interval and live for 2 hours.
# TODO: convert flexible lease time into route life time (only seconds).
xappend "--ra-param=$ifname,0,7200"
;;
esac
if [ "$dhcpv6" = "disabled" ] ; then
ra_management="3"
fi
case $ra_management in
0)
# SLACC with DCHP for extended options
xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-stateless,ra-names"
;;
2)
# DHCP address and RA only for management redirection
xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,$leasetime"
;;
3)
# SLAAC only but dnsmasq attempts to link HOSTNAME, DHCPv4 MAC, and SLAAC
xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-only,ra-names"
;;
*)
# SLAAC and full DHCP
xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,slaac,ra-names,$leasetime"
;;
esac
if [ -n "$dns" ]; then
dnss=""
for d in $dns; do append dnss "[$d]" ","; done
else
dnss="[::]"
fi
dhcp_option_append "option6:dns-server,$dnss" "$networkid"
fi
dhcp_option_add "$cfg" "$networkid" 0
dhcp_option_add "$cfg" "$networkid" 2
}
dhcp_option_append() {
local option="$1"
local networkid="$2"
local force="$3"
xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$option"
}
dhcp_option_add() {
# NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
local cfg="$1"
local networkid="$2"
local force="$3"
local opt="dhcp_option"
[ "$force" = "0" ] && force=
[ "$force" = "2" ] && opt="dhcp_option_force"
local list_len
config_get list_len "$cfg" "${opt}_LENGTH"
if [ -n "$list_len" ]; then
config_list_foreach "$cfg" "$opt" dhcp_option_append "$networkid" "$force"
else
config_get dhcp_option "$cfg" "$opt"
[ -n "$dhcp_option" ] && echo "Warning: the 'option $opt' syntax is deprecated, use 'list $opt'" >&2
local option
for option in $dhcp_option; do
dhcp_option_append "$option" "$networkid" "$force"
done
fi
}
dhcp_domain_add() {
local cfg="$1"
local ip name names record
config_get names "$cfg" name "$2"
[ -n "$names" ] || return 0
config_get ip "$cfg" ip "$3"
[ -n "$ip" ] || return 0
for name in $names; do
record="${record:+$record }$name"
done
echo "$ip $record" >> $HOSTFILE_TMP
}
dhcp_srv_add() {
local cfg="$1"
config_get srv "$cfg" srv
[ -n "$srv" ] || return 0
config_get target "$cfg" target
[ -n "$target" ] || return 0
config_get port "$cfg" port
[ -n "$port" ] || return 0
config_get class "$cfg" class
config_get weight "$cfg" weight
local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
xappend "--srv-host=$service"
}
dhcp_mx_add() {
local cfg="$1"
local domain relay pref
config_get domain "$cfg" domain
[ -n "$domain" ] || return 0
config_get relay "$cfg" relay
[ -n "$relay" ] || return 0
config_get pref "$cfg" pref 0
local service="$domain,$relay,$pref"
xappend "--mx-host=$service"
}
dhcp_cname_add() {
local cfg="$1"
local cname target
config_get cname "$cfg" cname
[ -n "$cname" ] || return 0
config_get target "$cfg" target
[ -n "$target" ] || return 0
xappend "--cname=${cname},${target}"
}
dhcp_hostrecord_add() {
local cfg="$1"
local names addresses record val
config_get names "$cfg" name "$2"
if [ -z "$names" ]; then
return 0
fi
config_get addresses "$cfg" ip "$3"
if [ -z "$addresses" ]; then
return 0
fi
for val in $names $addresses; do
record="${record:+$record,}$val"
done
xappend "--host-record=$record"
}
dhcp_relay_add() {
local cfg="$1"
local local_addr server_addr interface
config_get local_addr "$cfg" local_addr
[ -n "$local_addr" ] || return 0
config_get server_addr "$cfg" server_addr
[ -n "$server_addr" ] || return 0
config_get interface "$cfg" interface
if [ -z "$interface" ]; then
xappend "--dhcp-relay=$local_addr,$server_addr"
else
network_get_device ifname "$interface" || return
xappend "--dhcp-relay=$local_addr,$server_addr,$ifname"
fi
}
dnsmasq_start()
{
local cfg="$1" disabled resolvfile user_dhcpscript
config_get_bool disabled "$cfg" disabled 0
[ "$disabled" -gt 0 ] && return 0
# reset list of DOMAINS and DNS servers (for each dnsmasq instance)
DNS_SERVERS=""
DOMAIN=""
CONFIGFILE="${BASECONFIGFILE}.${cfg}"
CONFIGFILE_TMP="${CONFIGFILE}.$$"
HOSTFILE="${BASEHOSTFILE}.${cfg}"
HOSTFILE_TMP="${HOSTFILE}.$$"
BASEDHCPSTAMPFILE_CFG="${BASEDHCPSTAMPFILE}.${cfg}"
# before we can call xappend
mkdir -p /var/run/dnsmasq/
mkdir -p $(dirname $CONFIGFILE)
mkdir -p $(dirname $HOSTFILE)
mkdir -p /var/lib/misc
chown dnsmasq:dnsmasq /var/run/dnsmasq
echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE_TMP
echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE_TMP
local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
if [ ! -r "$dnsmasqconffile" ]; then
dnsmasqconffile=/etc/dnsmasq.conf
fi
# if we did this last, we could override auto-generated config
[ -f "${dnsmasqconffile}" ] && {
xappend "--conf-file=${dnsmasqconffile}"
}
$PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && DHCPv6CAPABLE=1 || DHCPv6CAPABLE=0
if [ -x /usr/sbin/odhcpd -a -x /etc/init.d/odhcpd ] ; then
local odhcpd_is_main odhcpd_is_enabled
config_get odhcpd_is_main odhcpd maindhcp 0
/etc/init.d/odhcpd enabled && odhcpd_is_enabled=1 || odhcpd_is_enabled=0
if [ "$odhcpd_is_enabled" -eq 0 -a "$DHCPv6CAPABLE" -eq 1 ] ; then
# DHCP V4 and V6 in DNSMASQ
DNSMASQ_DHCP_VER=6
elif [ "$odhcpd_is_main" -gt 0 ] ; then
# ODHCPD is doing it all
DNSMASQ_DHCP_VER=0
else
# You have ODHCPD but use DNSMASQ for DHCPV4
DNSMASQ_DHCP_VER=4
fi
elif [ "$DHCPv6CAPABLE" -eq 1 ] ; then
# DHCP V4 and V6 in DNSMASQ
DNSMASQ_DHCP_VER=6
else
DNSMASQ_DHCP_VER=4
fi
# Allow DHCP/DHCPv6 to be handled by ISC DHCPD
if [ -x /usr/sbin/dhcpd ] ; then
if [ -x /etc/init.d/dhcpd ] ; then
/etc/init.d/dhcpd enabled && DNSMASQ_DHCP_VER=0
fi
if [ -x /etc/init.d/dhcpd6 -a "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
/etc/init.d/dhcpd6 enabled && DNSMASQ_DHCP_VER=4
fi
fi
append_bool "$cfg" authoritative "--dhcp-authoritative"
append_bool "$cfg" nodaemon "--no-daemon"
append_bool "$cfg" domainneeded "--domain-needed"
append_bool "$cfg" filterwin2k "--filterwin2k"
append_bool "$cfg" nohosts "--no-hosts"
append_bool "$cfg" nonegcache "--no-negcache"
append_bool "$cfg" strictorder "--strict-order"
append_bool "$cfg" logqueries "--log-queries=extra"
append_bool "$cfg" noresolv "--no-resolv"
append_bool "$cfg" localise_queries "--localise-queries"
append_bool "$cfg" readethers "--read-ethers"
append_bool "$cfg" dbus "--enable-dbus"
append_bool "$cfg" expandhosts "--expand-hosts"
config_get tftp_root "$cfg" "tftp_root"
[ -n "$tftp_root" ] && mkdir -p "$tftp_root" && append_bool "$cfg" enable_tftp "--enable-tftp"
append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
append_bool "$cfg" nonwildcard "--bind-dynamic" 1
append_bool "$cfg" fqdn "--dhcp-fqdn"
append_bool "$cfg" proxydnssec "--proxy-dnssec"
append_bool "$cfg" localservice "--local-service"
append_bool "$cfg" logdhcp "--log-dhcp"
append_bool "$cfg" quietdhcp "--quiet-dhcp"
append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
append_bool "$cfg" allservers "--all-servers"
append_bool "$cfg" noping "--no-ping"
append_parm "$cfg" logfacility "--log-facility"
append_parm "$cfg" cachesize "--cache-size"
append_parm "$cfg" dnsforwardmax "--dns-forward-max"
append_parm "$cfg" port "--port"
append_parm "$cfg" ednspacket_max "--edns-packet-max"
append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
append_parm "$cfg" "queryport" "--query-port"
append_parm "$cfg" "minport" "--min-port"
append_parm "$cfg" "maxport" "--max-port"
append_parm "$cfg" "domain" "--domain"
append_parm "$cfg" "local" "--server"
config_list_foreach "$cfg" "listen_address" append_listenaddress
config_list_foreach "$cfg" "server" append_server
config_list_foreach "$cfg" "rev_server" append_rev_server
config_list_foreach "$cfg" "address" append_address
config_list_foreach "$cfg" "ipset" append_ipset
[ -n "$BOOT" ] || {
config_list_foreach "$cfg" "interface" append_interface
config_list_foreach "$cfg" "notinterface" append_notinterface
}
config_list_foreach "$cfg" "addnhosts" append_addnhosts
config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
append_parm "$cfg" "leasefile" "--dhcp-leasefile" "/tmp/dhcp.leases"
append_parm "$cfg" "serversfile" "--servers-file"
append_parm "$cfg" "tftp_root" "--tftp-root"
append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
append_parm "$cfg" "local_ttl" "--local-ttl"
append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
config_list_foreach "$cfg" "pxe_service" append_pxe_service
config_get DOMAIN "$cfg" domain
config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
config_get ADD_LOCAL_FQDN "$cfg" add_local_fqdn ""
config_get ADD_WAN_FQDN "$cfg" add_wan_fqdn 0
if [ -z "$ADD_LOCAL_FQDN" ] ; then
# maintain support for previous UCI
ADD_LOCAL_FQDN="$ADD_LOCAL_HOSTNAME"
fi
config_get_bool readethers "$cfg" readethers
[ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
config_get user_dhcpscript $cfg dhcpscript
if has_handler || [ -n "$user_dhcpscript" ]; then
xappend "--dhcp-script=$DHCPSCRIPT"
fi
config_get leasefile $cfg leasefile "/tmp/dhcp.leases"
[ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
config_get_bool cachelocal "$cfg" cachelocal 1
config_get_bool noresolv "$cfg" noresolv 0
if [ "$noresolv" != "1" ]; then
config_get resolvfile "$cfg" resolvfile "/tmp/resolv.conf.auto"
# So jail doesn't complain if file missing
[ -n "$resolvfile" -a \! -e "$resolvfile" ] && touch "$resolvfile"
fi
[ -n "$resolvfile" ] && xappend "--resolv-file=$resolvfile"
config_get hostsfile "$cfg" dhcphostsfile
[ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
local rebind
config_get_bool rebind "$cfg" rebind_protection 1
[ $rebind -gt 0 ] && {
log_once \
"DNS rebinding protection is active," \
"will discard upstream RFC1918 responses!"
xappend "--stop-dns-rebind"
local rebind_localhost
config_get_bool rebind_localhost "$cfg" rebind_localhost 0
[ $rebind_localhost -gt 0 ] && {
log_once "Allowing 127.0.0.0/8 responses"
xappend "--rebind-localhost-ok"
}
append_rebind_domain() {
log_once "Allowing RFC1918 responses for domain $1"
xappend "--rebind-domain-ok=$1"
}
config_list_foreach "$cfg" rebind_domain append_rebind_domain
}
config_get_bool dnssec "$cfg" dnssec 0
[ "$dnssec" -gt 0 ] && {
xappend "--conf-file=$TRUSTANCHORSFILE"
xappend "--dnssec"
[ -x /etc/init.d/sysntpd ] && {
/etc/init.d/sysntpd enabled
[ "$?" -ne 0 -o "$(uci_get system.ntp.enabled)" = "1" ] && {
[ -f "$TIMEVALIDFILE" ] || xappend "--dnssec-no-timecheck"
}
}
append_bool "$cfg" dnsseccheckunsigned "--dnssec-check-unsigned"
}
config_get addmac "$cfg" addmac 0
[ "$addmac" != "0" ] && {
[ "$addmac" = "1" ] && addmac=
xappend "--add-mac${addmac:+="$addmac"}"
}
dhcp_option_add "$cfg" "" 0
dhcp_option_add "$cfg" "" 2
xappend "--dhcp-broadcast=tag:needs-broadcast"
xappend "--addn-hosts=$(dirname $HOSTFILE)"
config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
xappend "--conf-dir=$dnsmasqconfdir"
dnsmasqconfdir="${dnsmasqconfdir%%,*}"
[ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
xappend "--user=dnsmasq"
xappend "--group=dnsmasq"
echo >> $CONFIGFILE_TMP
config_get_bool enable_tftp "$cfg" enable_tftp 0
[ "$enable_tftp" -gt 0 ] && {
config_get tftp_root "$cfg" tftp_root
append EXTRA_MOUNT $tftp_root
}
config_foreach filter_dnsmasq host dhcp_host_add "$cfg"
echo >> $CONFIGFILE_TMP
config_foreach filter_dnsmasq boot dhcp_boot_add "$cfg"
config_foreach filter_dnsmasq mac dhcp_mac_add "$cfg"
config_foreach filter_dnsmasq tag dhcp_tag_add "$cfg"
config_foreach filter_dnsmasq vendorclass dhcp_vendorclass_add "$cfg"
config_foreach filter_dnsmasq userclass dhcp_userclass_add "$cfg"
config_foreach filter_dnsmasq circuitid dhcp_circuitid_add "$cfg"
config_foreach filter_dnsmasq remoteid dhcp_remoteid_add "$cfg"
config_foreach filter_dnsmasq subscrid dhcp_subscrid_add "$cfg"
config_foreach filter_dnsmasq match dhcp_match_add "$cfg"
config_foreach filter_dnsmasq domain dhcp_domain_add "$cfg"
config_foreach filter_dnsmasq hostrecord dhcp_hostrecord_add "$cfg"
[ -n "$BOOT" ] || config_foreach filter_dnsmasq relay dhcp_relay_add "$cfg"
echo >> $CONFIGFILE_TMP
config_foreach filter_dnsmasq srvhost dhcp_srv_add "$cfg"
config_foreach filter_dnsmasq mxhost dhcp_mx_add "$cfg"
echo >> $CONFIGFILE_TMP
config_get_bool boguspriv "$cfg" boguspriv 1
[ "$boguspriv" -gt 0 ] && {
xappend "--bogus-priv"
[ -r "$RFC6761FILE" ] && xappend "--conf-file=$RFC6761FILE"
}
if [ "$DNSMASQ_DHCP_VER" -gt 4 ] ; then
# Enable RA feature for when/if it is constructed,
# and RA is selected per interface pool (RA, DHCP, or both),
# but no one (should) want RA broadcast in syslog
[ -n "$BOOT" ] || config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
xappend "--enable-ra"
xappend "--quiet-ra"
append_bool "$cfg" quietdhcp "--quiet-dhcp6"
elif [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
[ -n "$BOOT" ] || config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
fi
echo >> $CONFIGFILE_TMP
config_foreach filter_dnsmasq cname dhcp_cname_add "$cfg"
echo >> $CONFIGFILE_TMP
echo >> $CONFIGFILE_TMP
mv -f $CONFIGFILE_TMP $CONFIGFILE
mv -f $HOSTFILE_TMP $HOSTFILE
[ "$resolvfile" = "/tmp/resolv.conf.auto" ] && {
rm -f /tmp/resolv.conf
[ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
echo "search $DOMAIN" >> /tmp/resolv.conf
}
DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
for DNS_SERVER in $DNS_SERVERS ; do
echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
done
}
procd_open_instance $cfg
procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq."${cfg}".pid
procd_set_param file $CONFIGFILE
[ -n "$user_dhcpscript" ] && procd_set_param env USER_DHCPSCRIPT="$user_dhcpscript"
procd_set_param respawn
procd_add_jail dnsmasq ubus log
procd_add_jail_mount $CONFIGFILE $TRUSTANCHORSFILE $HOSTFILE $RFC6761FILE /etc/passwd /etc/group /etc/TZ /dev/null /dev/urandom $dnsmasqconffile $dnsmasqconfdir $resolvfile $user_dhcpscript /etc/hosts /etc/ethers /sbin/hotplug-call $EXTRA_MOUNT $DHCPSCRIPT
procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
procd_close_instance
}
dnsmasq_stop()
{
local cfg="$1" resolvfile
config_get resolvfile "$cfg" "resolvfile"
#relink /tmp/resolve.conf only for main instance
[ "$resolvfile" = "/tmp/resolv.conf.auto" ] && {
[ -f /tmp/resolv.conf ] && {
rm -f /tmp/resolv.conf
ln -s "$resolvfile" /tmp/resolv.conf
}
}
rm -f ${BASEDHCPSTAMPFILE}.${cfg}.*.dhcp
}
add_interface_trigger()
{
local interface ignore
config_get interface "$1" interface
config_get_bool ignore "$1" ignore 0
[ -n "$interface" -a $ignore -eq 0 ] && procd_add_interface_trigger "interface.*" "$interface" /etc/init.d/dnsmasq reload
}
service_triggers()
{
procd_add_reload_trigger "dhcp" "system"
config_load dhcp
config_foreach add_interface_trigger dhcp
config_foreach add_interface_trigger relay
}
boot()
{
BOOT=1
start "$@"
}
start_service() {
local instance="$1"
local instance_found=0
. /lib/functions/network.sh
config_cb() {
local type="$1"
local name="$2"
if [ "$type" = "dnsmasq" ]; then
if [ -n "$instance" -a "$instance" = "$name" ]; then
instance_found=1
fi
fi
}
config_load dhcp
if [ -n "$instance" ]; then
[ "$instance_found" -gt 0 ] || return
dnsmasq_start "$instance"
else
config_foreach dnsmasq_start dnsmasq
fi
}
reload_service() {
rc_procd start_service "$@"
procd_send_signal dnsmasq "$@"
}
stop_service() {
local instance="$1"
local instance_found=0
config_cb() {
local type="$1"
local name="$2"
if [ "$type" = "dnsmasq" ]; then
if [ -n "$instance" -a "$instance" = "$name" ]; then
instance_found=1
fi
fi
}
config_load dhcp
if [ -n "$instance" ]; then
[ "$instance_found" -gt 0 ] || return
dnsmasq_stop "$instance"
else
config_foreach dnsmasq_stop dnsmasq
fi
}