package/dnsmasq/files/dnsmasq.init

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