openwrt/package/base-files/default/etc/init.d/S50dnsmasq

   1 #!/bin/sh
   2 . /etc/functions.sh
   3
   4 # interface to use for DHCP
   5 iface=lan
   6
   7 ifname=$(nvram get ${iface}_ifname)
   8 ipaddr=$(nvram get ${iface}_ipaddr)
   9 netmask=$(nvram get ${iface}_netmask)
  10
  11 (
  12         # check for existing DHCP server
  13         udhcpc -n -q -R -s /dev/zero -i $ifname >&- || {
  14
  15           ipaddr=$(ip2int $ipaddr)
  16           netmask=$(ip2int ${netmask:-255.255.255.0})
  17           network=$((ipaddr&netmask))
  18
  19           start=$(nvram get dhcp_start)
  20           start=$((network+${start:-100}))
  21           end=$(nvram get dhcp_num)
  22           end=$((start+${end:-150}))
  23
  24           args="-l /tmp/dhcp.leases -K -F $(int2ip $start),$(int2ip $end),$(int2ip $netmask),12h"
  25         }
  26         dnsmasq ${args}
  27 ) &