openwrtv3/package/dnsmasq/files/dnsmasq.init
2010-10-06 13:23:56 +00:00

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#!/bin/sh /etc/rc.common
# Copyright (C) 2007 OpenWrt.org
START=60
DNS_SERVERS=""
DOMAIN=""
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
[ $_loctmp -gt 0 ] && append args "$value"
}
append_parm() {
local section="$1"
local option="$2"
local switch="$3"
local _loctmp
config_get _loctmp "$section" "$option"
[ -z "$_loctmp" ] && return 0
append args "$switch $_loctmp"
}
append_server() {
append args "-S $1"
}
append_interface() {
local ifname=$(uci_get_state network "$1" ifname "$1")
append args "-i $ifname"
}
append_notinterface() {
local ifname=$(uci_get_state network "$1" ifname "$1")
append args "-I $ifname"
}
append_addnhosts() {
append args "-H $1"
}
append_bogusnxdomain() {
append args "-B $1"
}
dnsmasq() {
local cfg="$1"
append_bool "$cfg" authoritative "-K"
append_bool "$cfg" nodaemon "-d"
append_bool "$cfg" domainneeded "-D"
append_bool "$cfg" filterwin2k "-f"
append_bool "$cfg" nohosts "-h"
append_bool "$cfg" nonegcache "-N"
append_bool "$cfg" strictorder "-o"
append_bool "$cfg" logqueries "-q"
append_bool "$cfg" noresolv "-R"
append_bool "$cfg" localise_queries "-y"
append_bool "$cfg" readethers "-Z"
append_bool "$cfg" dbus "-1"
append_bool "$cfg" boguspriv "-b"
append_bool "$cfg" expandhosts "-E"
append_bool "$cfg" enable_tftp "--enable-tftp"
append_bool "$cfg" nonwildcard "-z"
append_parm "$cfg" cachesize "-c"
append_parm "$cfg" dnsforwardmax "-0"
append_parm "$cfg" port "-p"
append_parm "$cfg" ednspacket_max "-P"
append_parm "$cfg" dhcpleasemax "-X"
append_parm "$cfg" "queryport" "-Q"
append_parm "$cfg" "domain" "-s"
append_parm "$cfg" "local" "-S"
config_list_foreach "$cfg" "server" append_server
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 "$cfg" "leasefile" "-l"
append_parm "$cfg" "resolvfile" "-r"
append_parm "$cfg" "tftp_root" "--tftp-root"
append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
config_get DOMAIN "$cfg" domain
config_get_bool readethers "$cfg" readethers
[ "$readethers" = "1" ] && [ -e "/etc/ethers" ] || touch /etc/ethers
config_get leasefile $cfg leasefile
[ -n "$leasefile" ] && [ -e "$leasefile" ] || touch "$leasefile"
config_get_bool cachelocal "$cfg" cachelocal 1
config_get hostsfile "$cfg" dhcphostsfile
[ -e "$hostsfile" ] && append args "--dhcp-hostsfile=$hostsfile"
local rebind
config_get_bool rebind "$cfg" rebind_protection 1
[ $rebind -gt 0 ] && {
logger -t dnsmasq \
"DNS rebinding protection is active," \
"will discard upstream RFC1918 responses!"
append args "--stop-dns-rebind"
local rebind_localhost
config_get_bool rebind_localhost "$cfg" rebind_localhost 0
[ $rebind_localhost -gt 0 ] && {
logger -t dnsmasq "Allowing 127.0.0.0/8 responses"
append args "--rebind-localhost-ok"
}
append_rebind_domain() {
logger -t dnsmasq "Allowing RFC1918 responses for domain $1"
append args "--rebind-domain-ok=$1"
}
config_list_foreach "$cfg" rebind_domain append_rebind_domain
}
}
dhcp_subscrid_add() {
local cfg="$1"
config_get networkid "$cfg" networkid
[ -n "$networkid" ] || return 0
config_get subscriberid "$cfg" subscriberid
[ -n "$subscriberid" ] || return 0
append args "--dhcp-subscrid=$networkid,$subscriberid"
dhcp_option_add "$cfg" "$networkid"
}
dhcp_remoteid_add() {
local cfg="$1"
config_get networkid "$cfg" networkid
[ -n "$networkid" ] || return 0
config_get remoteid "$cfg" remoteid
[ -n "$remoteid" ] || return 0
append args "--dhcp-remoteid=$networkid,$remoteid"
dhcp_option_add "$cfg" "$networkid"
}
dhcp_circuitid_add() {
local cfg="$1"
config_get networkid "$cfg" networkid
[ -n "$networkid" ] || return 0
config_get circuitid "$cfg" circuitid
[ -n "$circuitid" ] || return 0
append args "--dhcp-circuitid=$networkid,$circuitid"
dhcp_option_add "$cfg" "$networkid"
}
dhcp_userclass_add() {
local cfg="$1"
config_get networkid "$cfg" networkid
[ -n "$networkid" ] || return 0
config_get userclass "$cfg" userclass
[ -n "$userclass" ] || return 0
append args "--dhcp-userclass=$networkid,$userclass"
dhcp_option_add "$cfg" "$networkid"
}
dhcp_vendorclass_add() {
local cfg="$1"
config_get networkid "$cfg" networkid
[ -n "$networkid" ] || return 0
config_get vendorclass "$cfg" vendorclass
[ -n "$vendorclass" ] || return 0
append args "--dhcp-vendorclass=$networkid,$vendorclass"
dhcp_option_add "$cfg" "$networkid"
}
dhcp_host_add() {
local cfg="$1"
config_get name "$cfg" name
config_get networkid "$cfg" networkid
[ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid"
config_get ip "$cfg" ip
[ -n "$ip" ] || return 0
macs=""
config_get mac "$cfg" mac
for m in $mac; do append macs "$m" ","; done
[ -n "$macs" ] || return 0
append args "--dhcp-host=$macs,${networkid:+net:$networkid,}$ip${name:+,$name}"
}
dhcp_mac_add() {
local cfg="$1"
config_get networkid "$cfg" networkid
[ -n "$networkid" ] || return 0
config_get mac "$cfg" mac
[ -n "$mac" ] || return 0
append args "--dhcp-mac=$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
append args "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"
dhcp_option_add "$cfg" "$networkid"
}
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 "-2 '$ifname'" && return 0
config_get proto "$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 $ifname >&- && return 0
}
config_get start "$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}"
eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
append args "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
dhcp_option_add "$cfg" "$networkid"
}
dhcp_option_add() {
local cfg="$1"
local networkid="$2"
config_get dhcp_option "$cfg" dhcp_option
for o in $dhcp_option; do
append args "-O $networkid","$o"
done
}
dhcp_domain_add() {
local cfg="$1"
local ip name names
config_get names "$cfg" name
[ -n "$names" ] || return 0
config_get ip "$cfg" ip
[ -n "$ip" ] || return 0
local oIFS="$IFS"; IFS="."; set -- $ip; IFS="$oIFS"
local raddr="${4:+$4.$3.$2.$1.in-addr.arpa}"
for name in $names; do
local fqdn="$name"
[ "${fqdn%.*}" == "$fqdn" ] && \
fqdn="$fqdn${DOMAIN:+.$DOMAIN}"
append args "-A /$fqdn/$ip"
[ -n "$raddr" ] && {
append args "--ptr-record=$raddr,$fqdn"
raddr=""
}
done
}
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
local service="$srv,$target"
[ -n "$port" ] && service="$service,$port"
append args "-W $service"
}
start() {
include /lib/network
scan_interfaces
config_load dhcp
args=""
config_foreach dnsmasq dnsmasq
config_foreach dhcp_host_add host
config_foreach dhcp_boot_add boot
config_foreach dhcp_mac_add mac
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_srv_add srvhost
config_foreach dhcp_add dhcp
/usr/sbin/dnsmasq $args && {
rm -f /tmp/resolv.conf
[ -n "$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() {
[ -f /tmp/resolv.conf ] && {
rm -f /tmp/resolv.conf
ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
}
killall dnsmasq
return 0
}