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@ -2,55 +2,67 @@
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# Copyright (C) 2006 OpenWrt.org
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START=60
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start() {
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include /lib/network
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scan_interfaces
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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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dhcp_calc() {
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local ip="$1"
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local res=0
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args=""
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iface=lan
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config_get ifname "$iface" ifname
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config_get proto "$iface" proto
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while [ -n "$ip" ]; do
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part="${ip%%.*}"
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res="$(($res * 256))"
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res="$(($res + $part))"
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[ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
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done
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echo "$res"
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}
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dhcp_add() {
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local cfg="$1"
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config_get net "$cfg" interface
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[ -n "$net" ] || return 0
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[ "$proto" = static ] && 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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config_get ifname "$net" ifname
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[ -n "$ifname" ] || return 0
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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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config_get_bool ignore "$cfg" ignore
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[ "$ignore" -gt 0 ] && {
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append args "-I $ifname"
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return 0
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}
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# dhcp_enable=0 disables the dhcp server
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(
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[ -z "$dhcp_enable" -o "$dhcp_enable" -eq 1 ] && {
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# no existing DHCP server?
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config_get proto "$net" proto
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[ static = "$proto" ] || return 0
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# calculate settings
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config_get ipaddr "$iface" ipaddr
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config_get netmask "$iface" netmask
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eval $(ipcalc $ipaddr $netmask ${dhcp_start:-100} ${dhcp_num:-150})
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# and pass the args via config parser defines
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echo "${dhcp_enable:+@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 ${dhcp_lease:-12h}"
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}
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config_get ipaddr "$net" ipaddr
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config_get netmask "$net" netmask
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# check for an already active dhcp server on the interface, unless 'force' is set
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config_get_bool force "$cfg" force 0
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[ "$force" -gt 0 ] || {
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udhcpc -n -q -R -s /bin/true -i $ifname >&- && return 0
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}
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# ignore requests from wan interface
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config_get wan_proto wan proto
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config_get wan_ifname wan ifname
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[ -z "$wan_proto" -o "$wan_proto" = "none" ] || echo "@define wan_ifname $wan_ifname"
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config_get start "$cfg" start
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config_get end "$cfg" end
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config_get leasetime "$cfg" leasetime
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leasetime="${leasetime:-12h}"
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start="$(dhcp_calc "${start:-100}")"
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end="$((${end:-150} + 1))"
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eval "$(ipcalc.sh $ipaddr $netmask $start $end)"
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append args "-F $START,$END,$NETMASK,$leasetime"
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}
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start() {
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include /lib/network
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scan_interfaces
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config_load dhcp
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args=""
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config_foreach dhcp_add dhcp
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cat /etc/dnsmasq.conf
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) | awk -f /lib/config/template.awk | dnsmasq -C /proc/self/fd/0 && {
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dnsmasq $args && {
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rm -f /tmp/resolv.conf
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cat > /tmp/resolv.conf <<EOF
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nameserver 127.0.0.1
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Felix Fietkau
17 years ago