-#!/bin/sh
-. /etc/config/network
+#!/bin/sh /etc/rc.common
+# Copyright (C) 2007 OpenWrt.org
-# The following is to automatically configure the DHCP settings
-# based on config settings. Feel free to replace all this crap
-# with a simple "dnsmasq" and manage everything via the
-# /etc/dnsmasq.conf config file
+START=60
+DNS_SERVERS=""
+DOMAIN=""
-[ -f /etc/dnsmasq.conf ] || exit
+dhcp_calc() {
+ local ip="$1"
+ local res=0
-args=""
-iface=lan
-eval "ifname=\${${iface}_ifname}"
+ while [ -n "$ip" ]; do
+ part="${ip%%.*}"
+ res="$(($res * 256))"
+ res="$(($res + $part))"
+ [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
+ done
+ echo "$res"
+}
-dhcp_enable="${dhcp_enable:-1}"
-dhcp_start="${dhcp_start:-100}"
-dhcp_num="${dhcp_num:-50}"
-dhcp_lease="${dhcp_lease:-12h}"
+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"
+}
-# if dhcp_enable is unset and there is a dhcp server on the network already, default to dhcp_enable=0
-[ -z "$dhcp_enable" ] && udhcpc -n -q -R -s /bin/true -i $ifname >&- && dhcp_enable="${dhcp_enable:-0}"
+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 $_loctmp"
+}
-# dhcp_enable=0 disables the dhcp server
-(
- [ -z "$dhcp_enable" -o "$dhcp_enable" -eq 1 ] && {
- # no existing DHCP server?
+append_server() {
+ append args "-S $1"
+}
- # calculate settings
- eval "ipaddr=\${${iface}_ipaddr}"
- eval "netmask=\${${iface}_netmask}"
- eval $(ipcalc $ipaddr $netmask ${dhcp_start:-100} ${dhcp_num:-150})
-
- # and pass the args via config parser defines
- echo "@define dhcp_enable 1"
- echo "@define netmask $NETMASK"
- echo "@define start $START"
- echo "@define end $END"
- echo "@define lease ${dhcp_lease:-12h}"
+append_interface() {
+ local ifname=$(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 $dnsserver"
}
- # ignore requests from wan interface
- [ -z "$wan_proto" -o "$wan_proto" = "none" ] || echo "@define wan_ifname $wan_ifname"
+ append_bool "$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 $ifname >&- && {
+ logger -t dnsmasq \
+ "found already running DHCP-server on interface '$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="${limit:-150}"
+ eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
+ if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
+ append args "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
- cat /etc/dnsmasq.conf
-) | awk -f /usr/lib/parse-config.awk | dnsmasq -C /proc/self/fd/0
+ dhcp_option_add "$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
+}
projects / openwrt.git / blobdiff