6 # The following is to automatically configure the DHCP settings
7 # based on config settings. Feel free to replace all this crap
8 # with a simple "dnsmasq" and manage everything via the
9 # /etc/dnsmasq.conf config file
11 [ -f /etc/dnsmasq.conf ] || exit
15 config_get ifname "$iface" ifname
17 dhcp_enable="${dhcp_enable:-1}"
18 dhcp_start="${dhcp_start:-100}"
19 dhcp_num="${dhcp_num:-50}"
20 dhcp_lease="${dhcp_lease:-12h}"
22 # if dhcp_enable is unset and there is a dhcp server on the network already, default to dhcp_enable=0
23 [ -z "$dhcp_enable" ] && udhcpc -n -q -R -s /bin/true -i $ifname >&- && dhcp_enable="${dhcp_enable:-0}"
25 # dhcp_enable=0 disables the dhcp server
27 [ -z "$dhcp_enable" -o "$dhcp_enable" -eq 1 ] && {
28 # no existing DHCP server?
31 config_get ipaddr "$iface" ipaddr
32 config_get netmask "$iface" netmask
33 eval $(ipcalc $ipaddr $netmask ${dhcp_start:-100} ${dhcp_num:-150})
35 # and pass the args via config parser defines
36 echo "@define dhcp_enable 1"
37 echo "@define netmask $NETMASK"
38 echo "@define start $START"
39 echo "@define end $END"
40 echo "@define lease ${dhcp_lease:-12h}"
43 # ignore requests from wan interface
44 config_get wan_proto wan proto
45 config_get wan_ifname wan ifname
46 [ -z "$wan_proto" -o "$wan_proto" = "none" ] || echo "@define wan_ifname $wan_ifname"
49 ) | awk -f /usr/lib/parse-config.awk | dnsmasq -C /proc/self/fd/0