openwrt/package/dnsmasq/files/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 # check for existing DHCP server
  12 udhcpc -n -q -R -s /bin/true -i $ifname >&- || {
  13
  14   ipaddr=$(ip2int $ipaddr)
  15   netmask=$(ip2int ${netmask:-255.255.255.0})
  16   network=$((ipaddr&netmask))
  17
  18   start=$(nvram get dhcp_start)
  19   start=$((network+${start:-100}))
  20   end=$(nvram get dhcp_num)
  21   end=$((start+${end:-150}))
  22
  23   args="-l /tmp/dhcp.leases -K -F $(int2ip $start),$(int2ip $end),$(int2ip $netmask),12h"
  24 }
  25 dnsmasq ${args}