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