openwrt/package/dnsmasq/files/S50dnsmasq

   1 #!/bin/sh
   2 . /etc/functions.sh
   3 . /etc/network.overrides
   4 [ "$FAILSAFE" != "true" -a -e /etc/config/network ] && . /etc/config/network
   5
   6 # interface to use for DHCP
   7 iface=lan
   8
   9 ifname=$(nvram get ${iface}_ifname)
  10 ipaddr=$(nvram get ${iface}_ipaddr)
  11 netmask=$(nvram get ${iface}_netmask)
  12
  13 # check for existing DHCP server
  14 udhcpc -n -q -R -s /bin/true -i $ifname >&- || {
  15
  16   ipaddr=$(ip2int $ipaddr)
  17   netmask=$(ip2int ${netmask:-255.255.255.0})
  18   network=$((ipaddr&netmask))
  19
  20   start=$(nvram get dhcp_start)
  21   start=$((network+${start:-100}))
  22   end=$(nvram get dhcp_num)
  23   end=$((start+${end:-150}))
  24
  25   wanproto=$(nvram get wan_proto)
  26   [ -z "$wanproto" -o "$wanproto" = "none" ] || wanif=$(nvram get wan_ifname)
  27
  28   args="-l /tmp/dhcp.leases -K -F $(int2ip $start),$(int2ip $end),$(int2ip $netmask),12h ${wanif:+-I ${wanif} }"
  29 }
  30 dnsmasq ${args}