78 lines
1.5 KiB
Bash
78 lines
1.5 KiB
Bash
#!/bin/sh /etc/rc.common
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# Copyright (C) 2006 OpenWrt.org
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START=60
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dhcp_calc() {
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local ip="$1"
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local res=0
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while [ -n "$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 "$net" ] || return 0
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config_get ifname "$net" ifname
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[ -n "$ifname" ] || return 0
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config_get_bool ignore "$cfg" ignore
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[ "$ignore" -gt 0 ] && {
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append args "-I $ifname"
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return 0
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}
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config_get proto "$net" proto
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[ static = "$proto" ] || return 0
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config_get ipaddr "$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 -t 1 -i $ifname >&- && return 0
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}
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config_get start "$cfg" start
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config_get end "$cfg" end
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config_get leasetime "$cfg" leasetime
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config_get options "$cfg" options
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leasetime="${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${options:+ $options}"
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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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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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search lan
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EOF
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}
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}
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stop() {
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killall dnsmasq
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}
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