package/dnsmasq/files/dnsmasq.init

   1 #!/bin/sh /etc/rc.common
   2 # Copyright (C) 2006 OpenWrt.org
   3
   4 START=60
   5 start() {
   6         include /lib/network
   7         scan_interfaces
   8
   9         # The following is to automatically configure the DHCP settings
  10         # based on config settings. Feel free to replace all this crap
  11         # with a simple "dnsmasq" and manage everything via the
  12         # /etc/dnsmasq.conf config file
  13
  14         [ -f /etc/dnsmasq.conf ] || exit
  15
  16         args=""
  17         iface=lan
  18         config_get ifname "$iface" ifname
  19         config_get proto "$iface" proto
  20
  21         [ "$proto" = static ] && dhcp_enable="${dhcp_enable:-1}"
  22         dhcp_start="${dhcp_start:-100}"
  23         dhcp_num="${dhcp_num:-50}"
  24         dhcp_lease="${dhcp_lease:-12h}"
  25
  26         # if dhcp_enable is unset and there is a dhcp server on the network already, default to dhcp_enable=0
  27         [ -z "$dhcp_enable" ] && udhcpc -n -q -R -s /bin/true -i $ifname >&- && dhcp_enable="${dhcp_enable:-0}"
  28
  29         # dhcp_enable=0 disables the dhcp server
  30         (
  31                 [ -z "$dhcp_enable" -o "$dhcp_enable" -eq 1 ] && {
  32                         # no existing DHCP server?
  33
  34                         # calculate settings
  35                         config_get ipaddr "$iface" ipaddr
  36                         config_get netmask "$iface" netmask
  37                         eval $(ipcalc $ipaddr $netmask ${dhcp_start:-100} ${dhcp_num:-150})
  38
  39                         # and pass the args via config parser defines
  40                         echo "${dhcp_enable:+@define dhcp_enable 1}"
  41                         echo "@define netmask $NETMASK"
  42                         echo "@define start $START"
  43                         echo "@define end $END"
  44                         echo "@define lease ${dhcp_lease:-12h}"
  45                 }
  46
  47                 # ignore requests from wan interface
  48                 config_get wan_proto wan proto
  49                 config_get wan_ifname wan ifname
  50                 [ -z "$wan_proto" -o "$wan_proto" = "none" ] || echo "@define wan_ifname $wan_ifname"
  51
  52                 cat /etc/dnsmasq.conf
  53         ) | awk -f /lib/config/template.awk | dnsmasq -C /proc/self/fd/0
  54 }
  55
  56 stop() {
  57         killall dnsmasq
  58 }