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openwrtv4/package/network/services/dnsmasq/files/dnsmasq.init
Eric Luehrsen 9525743c07 dnsmasq: make DHCPv6 viable for standalone dnsmasq install 
dnsmasq has sufficient services to meet the needs of DHCP
and RA with IP6 for single router router users. This is
the most common use for consumer routers. Its reenforced
as most ISP tend to only DHCP-PD /64. dnsmasq has year
over year demonstrated great flexibility in its option
set, and support for off-standard DHCP clients.

odhcpd has enhanced capabilities focused on IP6 such
as DHCP/RA relay and NDP proxy. However, it is not as
flexible in its option set. odhcpd is not as forgiving
with off-standard DHCP clients. Some points may represent
a long term TODO list, but it is the state currently.

These changes make any such combination possible. Already
odhcpd can be set as the main dhcp server. Now odhcpd
can be removed or disabled and dnsmasq will take over
if DHCPv6 compiled in. The existing DHCPv6 and RA UCI
are translated into dnsmasq.conf. The changes focus on
'--dhcp-range', '--dhcp-host', and '--dhcp-options'.

DHCP host ID is least 16 bits [::1000-::FFFF], but
leaves low range for typical infrastructure assignments.
dnsmasq accepts DHCPv6 options in the tranditional
'--dhcp-option' put they must be prefixed 'option6:'.
dnsmasq will also discover SLAAC DNS entries from DHCPv4
clients MAC, and confirm with a ping at least renew.

Long term TODO include improving use of dnsmasq relay
options for DHCPv4 and DHCPv6 in parallel. It would also
be possible to preconfigure DHCP-PD in host-with-options
records for fixed infrastructure.

Signed-off-by: Eric Luehrsen <ericluehrsen@hotmail.com>
[Jo-Philipp Wich: emit proper IPv6 hostid format in dhcp-host directive]
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2017-02-02 00:13:49 +01:00

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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"
BASETIMESTAMPFILE="/etc/dnsmasq.time"
TRUSTANCHORSFILE="/usr/share/dnsmasq/trust-anchors.conf"
TIMEVALIDFILE="/var/state/dnsmasqsec"
BASEDHCPSTAMPFILE="/var/run/dnsmasq"
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 $rv
}
log_once() {
pidof dnsmasq >/dev/null || \
logger -t dnsmasq "$@"
}
append_bool() {
local section="$1"
local option="$2"
local value="$3"
local _loctmp
config_get_bool _loctmp "$section" "$option" 0
[ $_loctmp -gt 0 ] && xappend "$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_address() {
xappend "--address=$1"
}
append_ipset() {
xappend "--ipset=$1"
}
append_interface() {
network_get_device ifname "$1" || return
xappend "--interface=$ifname"
}
append_notinterface() {
network_get_device ifname "$1" || return
xappend "--except-interface=$ifname"
}
append_addnhosts() {
xappend "--addn-hosts=$1"
}
append_bogusnxdomain() {
xappend "--bogus-nxdomain=$1"
}
append_pxe_service() {
xappend "--pxe-service=$1"
}
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="$1"
local hosttag nametime addrs
config_get_bool force "$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}" >> $HOSTFILE
}
config_get mac "$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
macs=""
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 "$hostid"
fi
config_get_bool broadcast "$cfg" broadcast 0
config_get leasetime "$cfg" leasetime
[ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
hosttag="${networkid:+,set:${networkid}}${tag:+,set:${tag}}$broadcast"
nametime="${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
xappend "--interface-name=$ifdashname.$routername.$DOMAIN,$ifname"
fi
xappend "--interface-name=$routername.$DOMAIN,$ifname"
fi
# All IP addresses discovered by dnsmasq will be labeled (except fe80::)
xappend "--interface-name=$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="$1"
local dhcp6range="::"
local nettag
config_get net "$cfg" interface
[ -n "$net" ] || return 0
config_get networkid "$cfg" networkid
[ -n "$networkid" ] || networkid="$net"
network_get_subnet subnet "$net" || return 0
network_get_device ifname "$net" || return 0
network_get_protocol proto "$net" || return 0
[ "$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
}
# 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
# Put the router host name on this DHCP served interface address(es)
dhcp_this_host_add "$net" "$ifname" "$ADD_LOCAL_FQDN"
start="$( dhcp_calc "$start" )"
nettag="${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 [ "$dhcpv4" != "disabled" ] ; then
xappend "--dhcp-range=$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,$leasetime"
;;
esac
fi
dhcp_option_add "$cfg" "$networkid"
}
dhcp_option_add() {
# NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
local cfg="$1"
local networkid="$2"
local force="$3"
[ "$force" = "0" ] && force=
config_get dhcp_option "$cfg" dhcp_option
for o in $dhcp_option; do
xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$o"
done
}
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
}
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,$server_addr"
else
xappend "--dhcp-relay=$local_addr,$server_addr,$interface"
fi
}
dnsmasq_start()
{
local cfg="$1" disabled
config_get_bool disabled "$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}"
TIMESTAMPFILE="${BASETIMESTAMPFILE}.${cfg}"
BASEDHCPSTAMPFILE_CFG="${BASEDHCPSTAMPFILE}.${cfg}"
# before we can call xappend
mkdir -p /var/run/dnsmasq/
mkdir -p $(dirname $CONFIGFILE)
mkdir -p $(dirname $HOSTFILE)
mkdir -p /var/lib/misc
chown dnsmasq:dnsmasq /var/run/dnsmasq
[ -f "$TIMESTAMPFILE" ] && rm -f "$TIMESTAMPFILE"
echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE_TMP
echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE
# if we did this last, we could override auto-generated config
[ -f /etc/dnsmasq.conf ] && {
xappend "--conf-file=/etc/dnsmasq.conf"
}
$PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && 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
/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
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 "$cfg" boguspriv "--bogus-priv"
append_bool "$cfg" expandhosts "--expand-hosts"
config_get tftp_root "$cfg" "tftp_root"
[ -d "$tftp_root" ] && append_bool "$cfg" enable_tftp "--enable-tftp"
append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
append_bool "$cfg" nonwildcard "--bind-dynamic"
append_bool "$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 "$cfg" dhcpscript "--dhcp-script"
append_parm "$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" "server" append_server
config_list_foreach "$cfg" "address" append_address
config_list_foreach "$cfg" "ipset" append_ipset
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" "resolvfile" "--resolv-file" "/tmp/resolv.conf.auto"
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 resolvfile $cfg resolvfile
config_get dhcpscript $cfg dhcpscript
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 "$resolvfile"
fi
config_get hostsfile "$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 "$cfg" "" 0
xappend "--dhcp-broadcast=tag:needs-broadcast"
xappend "--addn-hosts=$(dirname $HOSTFILE)"
config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
[ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
xappend "--conf-dir=$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"
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 >> $CONFIGFILE_TMP
if [ "$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
config_foreach dhcp_add dhcp
xappend "--enable-ra"
xappend "--quiet-ra"
elif [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
config_foreach dhcp_add dhcp
fi
echo >> $CONFIGFILE_TMP
config_foreach filter_dnsmasq cname dhcp_cname_add "$cfg"
echo >> $CONFIGFILE_TMP
echo >> $CONFIGFILE_TMP
mv -f $CONFIGFILE_TMP $CONFIGFILE
[ "$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 $CONFIGFILE
procd_set_param respawn
local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
if [ ! -r "$dnsmasqconffile" ]; then
dnsmasqconffile=/etc/dnsmasq.conf
fi
procd_add_jail dnsmasq ubus log
procd_add_jail_mount $CONFIGFILE $TRUSTANCHORSFILE $HOSTFILE /etc/passwd /etc/group /etc/TZ /dev/null /dev/urandom $dnsmasqconffile $dnsmasqconfdir $resolvfile $dhcpscript /etc/hosts /etc/ethers $EXTRA_MOUNT
procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
procd_close_instance
}
dnsmasq_stop()
{
local cfg="$1"
config_get resolvfile "$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
}
service_triggers()
{
procd_add_reload_trigger "dhcp"
procd_add_raw_trigger "interface.*" 2000 /etc/init.d/dnsmasq reload
}
boot()
{
BOOT=1
start "$@"
}
start_service() {
local instance="$1"
local instance_found=0
[ -n "$BOOT" ] && return
. /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 "$@"
return 0
}
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
}
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