46 lines
1.4 KiB
Bash
46 lines
1.4 KiB
Bash
#!/bin/sh
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. /etc/config/network
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# The following is to automatically configure the DHCP settings
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# based on config settings. Feel free to replace all this crap
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# with a simple "dnsmasq" and manage everything via the
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# /etc/dnsmasq.conf config file
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[ -f /etc/dnsmasq.conf ] || exit
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args=""
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iface=lan
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eval "ifname=\${${iface}_ifname}"
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dhcp_enable="${dhcp_enable:-1}"
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dhcp_start="${dhcp_start:-100}"
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dhcp_num="${dhcp_num:-50}"
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dhcp_lease="${dhcp_lease:-12h}"
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# if dhcp_enable is unset and there is a dhcp server on the network already, default to dhcp_enable=0
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[ -z "$dhcp_enable" ] && udhcpc -n -q -R -s /bin/true -i $ifname >&- && dhcp_enable="${dhcp_enable:-0}"
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# dhcp_enable=0 disables the dhcp server
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(
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[ -z "$dhcp_enable" -o "$dhcp_enable" -eq 1 ] && {
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# no existing DHCP server?
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# calculate settings
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eval "ipaddr=\${${iface}_ipaddr}"
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eval "netmask=\${${iface}_netmask}"
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eval $(ipcalc $ipaddr $netmask ${dhcp_start:-100} ${dhcp_num:-150})
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# and pass the args via config parser defines
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echo "@define dhcp_enable 1"
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echo "@define netmask $NETMASK"
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echo "@define start $START"
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echo "@define end $END"
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echo "@define lease ${dhcp_lease:-12h}"
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}
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# ignore requests from wan interface
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[ -z "$wan_proto" -o "$wan_proto" = "none" ] || echo "@define wan_ifname $wan_ifname"
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cat /etc/dnsmasq.conf
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) | awk -f /usr/lib/parse-config.awk | dnsmasq -C /proc/self/fd/0
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