openwrtv3/package/network/services/dnsmasq/files/dnsmasq.init
Jo-Philipp Wich 5db9587b5f dnsmasq: fix backward compatibility with existing configs
Changeset r36943 ("dnsmasq: use host-record instead of address") removed
the automatic domain expansion for config domain sections, this breaks
existing setups and alters the old behaviour in unexpected ways, therfore
restore behaviour of the current stable release.

Additionally handle fully qualified hostnames properly when setting up the
own hostrecord by stripping the local domain part form the given name
instead of unconditionally appending it, so that "example.lan" results
in "example example.lan" and not "example.lan example.lan.lan".

SVN-Revision: 38648
2013-11-04 22:40:56 +00:00

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#!/bin/sh /etc/rc.common
# Copyright (C) 2007-2012 OpenWrt.org
START=60
USE_PROCD=1
PROG=/usr/sbin/dnsmasq
DNS_SERVERS=""
DOMAIN=""
ADD_LOCAL_DOMAIN=1
ADD_LOCAL_HOSTNAME=1
CONFIGFILE="/var/etc/dnsmasq.conf"
xappend() {
local value="$1"
echo "${value#--}" >> $CONFIGFILE
}
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"
}
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="$3"
local _loctmp
config_get _loctmp "$section" "$option"
[ -z "$_loctmp" ] && return 0
xappend "$switch=$_loctmp"
}
append_server() {
xappend "--server=$1"
}
append_address() {
xappend "--address=$1"
}
append_interface() {
local ifname=$(uci_get_state network "$1" ifname "$1")
xappend "--interface=$ifname"
}
append_notinterface() {
local ifname=$(uci_get_state network "$1" ifname "$1")
xappend "--except-interface=$ifname"
}
append_addnhosts() {
xappend "--addn-hosts=$1"
}
append_bogusnxdomain() {
xappend "--bogus-nxdomain=$1"
}
dnsmasq() {
local cfg="$1"
append_bool "$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 "$cfg" logqueries "--log-queries"
append_bool "$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 "$cfg" expandhosts "--expand-hosts"
append_bool "$cfg" enable_tftp "--enable-tftp"
append_bool "$cfg" nonwildcard "--bind-interfaces"
append_bool "$cfg" fqdn "--dhcp-fqdn"
append_bool "$cfg" proxydnssec "--proxy-dnssec"
append_parm "$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 "$cfg" "domain" "--domain"
append_parm "$cfg" "local" "--server"
config_list_foreach "$cfg" "server" append_server
config_list_foreach "$cfg" "address" append_address
config_list_foreach "$cfg" "interface" append_interface
config_list_foreach "$cfg" "notinterface" append_notinterface
config_list_foreach "$cfg" "addnhosts" append_addnhosts
config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
append_parm "$cfg" "leasefile" "--dhcp-leasefile"
append_parm "$cfg" "resolvfile" "--resolv-file"
append_parm "$cfg" "tftp_root" "--tftp-root"
append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
append_parm "$cfg" "local_ttl" "--local-ttl"
config_get DOMAIN "$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_bool readethers "$cfg" readethers
[ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
config_get leasefile $cfg leasefile
[ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
config_get_bool cachelocal "$cfg" cachelocal 1
config_get hostsfile "$cfg" dhcphostsfile
[ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
mkdir -p /tmp/hosts
xappend "--addn-hosts=/tmp/hosts"
local rebind
config_get_bool rebind "$cfg" rebind_protection 1
[ $rebind -gt 0 ] && {
logger -t dnsmasq \
"DNS rebinding protection is active," \
"will discard upstream RFC1918 responses!"
xappend "--stop-dns-rebind"
local rebind_localhost
config_get_bool rebind_localhost "$cfg" rebind_localhost 0
[ $rebind_localhost -gt 0 ] && {
logger -t dnsmasq "Allowing 127.0.0.0/8 responses"
xappend "--rebind-localhost-ok"
}
append_rebind_domain() {
logger -t dnsmasq "Allowing RFC1918 responses for domain $1"
xappend "--rebind-domain-ok=$1"
}
config_list_foreach "$cfg" rebind_domain append_rebind_domain
}
dhcp_option_add "$cfg" "" 0
xappend "--dhcp-broadcast=tag:needs-broadcast"
echo >> $CONFIGFILE
}
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() {
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() {
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_host_add() {
local cfg="$1"
config_get_bool force "$cfg" force 0
config_get networkid "$cfg" networkid
[ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
config_get name "$cfg" name
config_get ip "$cfg" ip
[ -n "$ip" -o -n "$name" ] || return 0
config_get mac "$cfg" mac
[ -z "$mac" ] && {
[ -n "$name" ] || return 0
mac="$name"
name=""
}
macs=""
for m in $mac; do append macs "$m" ","; done
config_get tag "$cfg" tag
config_get_bool broadcast "$cfg" broadcast 0
[ "$broadcast" = "0" ] && broadcast=
xappend "--dhcp-host=$macs${networkid:+,net:$networkid}${broadcast:+,set:needs-broadcast}${tag:+,set:$tag}${ip:+,$ip}${name:+,$name}"
}
dhcp_tag_add() {
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() {
local cfg="$1"
config_get networkid "$cfg" networkid
config_get filename "$cfg" filename
[ -n "$filename" ] || return 0
config_get servername "$cfg" servername
[ -n "$servername" ] || return 0
config_get serveraddress "$cfg" serveraddress
[ -n "$serveraddress" ] || return 0
xappend "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"
config_get_bool force "$cfg" force 0
dhcp_option_add "$cfg" "$networkid" "$force"
}
dhcp_add() {
local cfg="$1"
config_get net "$cfg" interface
[ -n "$net" ] || return 0
config_get networkid "$cfg" networkid
[ -n "$networkid" ] || networkid="$net"
config_get ifname "$net" ifname
[ -n "$ifname" ] || return 0
config_get dnsserver "$net" dns
[ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
DNS_SERVERS="$DNS_SERVERS $dnsserver"
}
append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && return 0
config_get proto "$net" proto
[ static = "$proto" ] || return 0
config_get ipaddr "$net" ipaddr
config_get netmask "$cfg" netmask
[ -n "$netmask" ] || config_get netmask "$net" netmask
#check for an already active dhcp server on the interface, unless 'force' is set
config_get_bool force "$cfg" force 0
[ $force -gt 0 ] || {
udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && {
logger -t dnsmasq \
"found already running DHCP-server on interface '$ifname'" \
"refusing to start, use 'option force 1' to override"
return 0
}
}
config_get start "$cfg" start
config_get limit "$cfg" limit
config_get leasetime "$cfg" leasetime
config_get options "$cfg" options
config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
leasetime="${leasetime:-12h}"
start="$(dhcp_calc "${start:-100}")"
limit="${limit:-150}"
[ "$limit" -gt 0 ] && limit=$((limit-1))
eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
xappend "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
dhcp_option_add "$cfg" "$networkid"
}
dhcp_option_add() {
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 $names; do
[ "${name%.*}" == "$name" ] && \
name="$name${DOMAIN:+.$DOMAIN}"
record="${record:+$record/}$name"
done
xappend "--address=/$record/$ip"
}
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"
}
service_triggers()
{
procd_add_reload_trigger "dhcp"
}
start_service() {
include /lib/network
scan_interfaces
local lanaddr
config_get lanaddr "lan" ipaddr
config_load dhcp
procd_open_instance
procd_set_param command $PROG -C $CONFIGFILE -k
procd_close_instance
# before we can call xappend
mkdir -p $(dirname $CONFIGFILE)
echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE
# if we did this last, we could override auto-generated config
[ -f /etc/dnsmasq.conf ] && {
xappend "--conf-file=/etc/dnsmasq.conf"
}
args=""
config_foreach dnsmasq dnsmasq
config_foreach dhcp_host_add host
echo >> $CONFIGFILE
config_foreach dhcp_boot_add boot
config_foreach dhcp_mac_add mac
config_foreach dhcp_tag_add tag
config_foreach dhcp_vendorclass_add vendorclass
config_foreach dhcp_userclass_add userclass
config_foreach dhcp_circuitid_add circuitid
config_foreach dhcp_remoteid_add remoteid
config_foreach dhcp_subscrid_add subscrid
config_foreach dhcp_domain_add domain
config_foreach dhcp_hostrecord_add hostrecord
# add own hostname
[ $ADD_LOCAL_HOSTNAME -eq 1 ] && [ -n "$lanaddr" ] && {
local hostname="$(uci_get system @system[0] hostname OpenWrt)"
dhcp_hostrecord_add "" "${hostname%.$DOMAIN}${DOMAIN:+.$DOMAIN ${hostname%.$DOMAIN}}" "$lanaddr"
}
echo >> $CONFIGFILE
config_foreach dhcp_srv_add srvhost
config_foreach dhcp_mx_add mxhost
echo >> $CONFIGFILE
config_foreach dhcp_add dhcp
echo >> $CONFIGFILE
config_foreach dhcp_cname_add cname
echo >> $CONFIGFILE
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
}
stop_service() {
[ -f /tmp/resolv.conf ] && {
rm -f /tmp/resolv.conf
ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
}
}