Use a more explicit variable name for the number of dhcp leases (#2240)
[openwrt/svn-archive/archive.git] / package / dnsmasq / files / dnsmasq.init
index 7afcee4..4d5b660 100644 (file)
@@ -2,55 +2,75 @@
 # Copyright (C) 2006 OpenWrt.org
 
 START=60
-start() {
-       include /lib/network
-       scan_interfaces
-       
-       # 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
-       
-       [ -f /etc/dnsmasq.conf ] || exit
+
+dhcp_calc() {
+       local ip="$1"
+       local res=0
        
-       args=""
-       iface=lan
-       config_get ifname "$iface" ifname
-       config_get proto "$iface" proto
+       while [ -n "$ip" ]; do
+               part="${ip%%.*}"
+               res="$(($res * 256))"
+               res="$(($res + $part))"
+               [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
+       done
+       echo "$res"
+}
+
+dhcp_add() {
+       local cfg="$1"
+
+       config_get net "$cfg" interface
+       [ -n "$net" ] || return 0
        
-       [ "$proto" = static ] && dhcp_enable="${dhcp_enable:-1}"
-       dhcp_start="${dhcp_start:-100}"
-       dhcp_num="${dhcp_num:-50}"
-       dhcp_lease="${dhcp_lease:-12h}"
+       config_get ifname "$net" ifname
+       [ -n "$ifname" ] || return 0
        
-       # 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}"
+       config_get_bool ignore "$cfg" ignore
+       [ "$ignore" -gt 0 ] && {
+               append args "-I $ifname"
+               return 0
+       }
        
-       # dhcp_enable=0 disables the dhcp server
-       (
-               [ -z "$dhcp_enable" -o "$dhcp_enable" -eq 1 ] && {
-                       # no existing DHCP server?
+       config_get proto "$net" proto
+       [ static = "$proto" ] || return 0
        
-                       # calculate settings
-                       config_get ipaddr "$iface" ipaddr
-                       config_get netmask "$iface" netmask
-                       eval $(ipcalc $ipaddr $netmask ${dhcp_start:-100} ${dhcp_num:-150})
-                       
-                       # and pass the args via config parser defines
-                       echo "${dhcp_enable:+@define dhcp_enable 1}"
-                       echo "@define netmask $NETMASK"
-                       echo "@define start $START"
-                       echo "@define end $END"
-                       echo "@define lease ${dhcp_lease:-12h}"
-               }
+       config_get ipaddr "$net" ipaddr
+       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 -R -s /bin/true -t 1 -i $ifname >&- && return 0
+       }
        
-               # ignore requests from wan interface
-               config_get wan_proto wan proto
-               config_get wan_ifname wan ifname
-               [ -z "$wan_proto" -o "$wan_proto" = "none" ] || echo "@define wan_ifname $wan_ifname"
+       config_get start "$cfg" start
+       config_get limit "$cfg" limit
+       config_get leasetime "$cfg" leasetime
+       config_get options "$cfg" options
+
+       leasetime="${leasetime:-12h}"
+       start="$(dhcp_calc "${start:-100}")"
+       limit="$((${limit:-150} + 1))"
+       eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
+       append args "-F $START,$END,$NETMASK,$leasetime${options:+ $options}"
+}
+
+start() {
+       include /lib/network
+       scan_interfaces
+       config_load /var/state/network
+       config_load dhcp
+
+       args=""
+       config_foreach dhcp_add dhcp
        
-               cat /etc/dnsmasq.conf
-       ) | awk -f /lib/config/template.awk | dnsmasq -C /proc/self/fd/0
+       dnsmasq $args && {
+               rm -f /tmp/resolv.conf
+               cat > /tmp/resolv.conf <<EOF
+nameserver 127.0.0.1
+search lan
+EOF
+       }
 }
 
 stop() {