#!/bin/sh
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# udhcpc script edited by Tim Riker <Tim@Rikers.org>
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[ -z "$1" ] && echo "Error: should be called from udhcpc" && exit 1
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ACTION="$1"
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RESOLV_CONF="/etc/resolv.conf"
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[ -e $RESOLV_CONF ] || touch $RESOLV_CONF
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[ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
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[ -n "$subnet" ] && NETMASK="netmask $subnet"
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# Handle stateful DHCPv6 like DHCPv4
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[ -n "$ipv6" ] && ip="$ipv6/128"
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if [ -z "${IF_WAIT_DELAY}" ]; then
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IF_WAIT_DELAY=10
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fi
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wait_for_ipv6_default_route() {
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printf "Waiting for IPv6 default route to appear"
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while [ $IF_WAIT_DELAY -gt 0 ]; do
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if ip -6 route list | grep -q default; then
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printf "\n"
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return
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fi
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sleep 1
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printf "."
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: $((IF_WAIT_DELAY -= 1))
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done
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printf " timeout!\n"
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}
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case "$ACTION" in
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deconfig)
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/sbin/ifconfig $interface up
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/sbin/ifconfig $interface 0.0.0.0
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# drop info from this interface
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# resolv.conf may be a symlink to /tmp/, so take care
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TMPFILE=$(mktemp)
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grep -vE "# $interface\$" $RESOLV_CONF > $TMPFILE
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cat $TMPFILE > $RESOLV_CONF
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rm -f $TMPFILE
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if [ -x /usr/sbin/avahi-autoipd ]; then
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/usr/sbin/avahi-autoipd -c $interface && /usr/sbin/avahi-autoipd -k $interface
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fi
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;;
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leasefail|nak)
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if [ -x /usr/sbin/avahi-autoipd ]; then
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/usr/sbin/avahi-autoipd -c $interface || /usr/sbin/avahi-autoipd -wD $interface --no-chroot
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fi
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;;
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renew|bound)
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if [ -x /usr/sbin/avahi-autoipd ]; then
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/usr/sbin/avahi-autoipd -c $interface && /usr/sbin/avahi-autoipd -k $interface
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fi
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/sbin/ifconfig $interface $ip $BROADCAST $NETMASK
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if [ -n "$ipv6" ] ; then
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wait_for_ipv6_default_route
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fi
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# RFC3442: If the DHCP server returns both a Classless
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# Static Routes option and a Router option, the DHCP
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# client MUST ignore the Router option.
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if [ -n "$staticroutes" ]; then
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echo "deleting routers"
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route -n | while read dest gw mask flags metric ref use iface; do
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[ "$iface" != "$interface" -o "$gw" = "0.0.0.0" ] || \
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route del -net "$dest" netmask "$mask" gw "$gw" dev "$interface"
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done
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# format: dest1/mask gw1 ... destn/mask gwn
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set -- $staticroutes
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while [ -n "$1" -a -n "$2" ]; do
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route add -net "$1" gw "$2" dev "$interface"
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shift 2
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done
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elif [ -n "$router" ] ; then
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echo "deleting routers"
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while route del default gw 0.0.0.0 dev $interface 2> /dev/null; do
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:
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done
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for i in $router ; do
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route add default gw $i dev $interface
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done
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fi
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# drop info from this interface
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# resolv.conf may be a symlink to /tmp/, so take care
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TMPFILE=$(mktemp)
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grep -vE "# $interface\$" $RESOLV_CONF > $TMPFILE
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cat $TMPFILE > $RESOLV_CONF
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rm -f $TMPFILE
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# prefer rfc3397 domain search list (option 119) if available
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if [ -n "$search" ]; then
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search_list=$search
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elif [ -n "$domain" ]; then
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search_list=$domain
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fi
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[ -n "$search_list" ] &&
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echo "search $search_list # $interface" >> $RESOLV_CONF
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for i in $dns ; do
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echo adding dns $i
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echo "nameserver $i # $interface" >> $RESOLV_CONF
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done
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;;
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esac
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HOOK_DIR="$0.d"
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for hook in "${HOOK_DIR}/"*; do
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[ -f "${hook}" -a -x "${hook}" ] || continue
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"${hook}" "$ACTION"
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done
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exit 0
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