NetBSD/usr.sbin/dhcp/client/scripts/netbsd

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#!/bin/sh
if [ x$new_broadcast_address != x ]; then
new_broadcast_arg="broadcast $new_broadcast_address"
fi
if [ x$old_broadcast_address != x ]; then
old_broadcast_arg="broadcast $old_broadcast_address"
fi
if [ x$new_subnet_mask != x ]; then
new_netmask_arg="netmask $new_subnet_mask"
fi
if [ x$old_subnet_mask != x ]; then
old_netmask_arg="netmask $old_subnet_mask"
fi
if [ x$alias_subnet_mask != x ]; then
alias_subnet_arg="netmask $alias_subnet_mask"
fi
if [ x$reason = xMEDIUM ]; then
ifconfig $interface $medium
ifconfig $interface inet -alias 0.0.0.0 $medium >/dev/null 2>&1
ifconfig $interface
sleep 1
exit 0
fi
if [ x$reason = xPREINIT ]; then
if [ x$alias_ip_address != x ]; then
ifconfig $interface inet -alias $alias_ip_address > /dev/null 2>&1
route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
fi
ifconfig $interface inet 0.0.0.0 netmask 0.0.0.0 \
broadcast 255.255.255.255 up
exit 0
fi
if [ x$reason = xARPCHECK ] || [ x$reason = xARPSEND ]; then
exit 0;
fi
if [ x$reason = xBOUND ] || [ x$reason = xRENEW ] || \
[ x$reason = xREBIND ] || [ x$reason = xREBOOT ]; then
if [ x$old_ip_address != x ] && [ x$alias_ip_address != x ] && \
[ x$alias_ip_address != x$old_ip_address ]; then
ifconfig $interface inet -alias $alias_ip_address > /dev/null 2>&1
route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
fi
if [ x$old_ip_address != x ] && [ x$old_ip_address != x$new_ip_address ]; then
ifconfig $interface inet -alias $old_ip_address $medium
route delete $old_ip_address 127.1 >/dev/null 2>&1
for router in $old_routers; do
route delete default $router >/dev/null 2>&1
done
arp -n -a | sed -n -e 's/^.*(\(.*\)) at .*$/arp -n -d \1/p' |sh
fi
if [ x$old_ip_address = x ] || [ x$old_ip_address != x$new_ip_address ] || \
[ x$reason = xBOUND ] || [ x$reason = xREBOOT ]; then
ifconfig $interface inet $new_ip_address $new_netmask_arg \
$new_broadcast_arg $medium
route add $new_ip_address 127.1 >/dev/null 2>&1
for router in $new_routers; do
route add default $router >/dev/null 2>&1
done
fi
if [ x$new_ip_address != x$alias_ip_address ] && [ x$alias_ip_address != x ];
then
ifconfig $interface inet alias $alias_ip_address $alias_subnet_arg
route add $alias_ip_address 127.0.0.1
fi
echo search $new_domain_name >/etc/resolv.conf
for nameserver in $new_domain_name_servers; do
echo nameserver $nameserver >>/etc/resolv.conf
done
exit 0
fi
if [ x$reason = xEXPIRE ] || [ x$reason = xFAIL ]; then
if [ x$alias_ip_address != x ]; then
ifconfig $interface inet -alias $alias_ip_address > /dev/null 2>&1
route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
fi
if [ x$old_ip_address != x ]; then
ifconfig $interface inet -alias $old_ip_address $medium
route delete $old_ip_address 127.1 >/dev/null 2>&1
for router in $old_routers; do
route delete default $router >/dev/null 2>&1
done
arp -n -a | sed -n -e 's/^.*(\(.*\)) at .*$/arp -n -d \1/p' \
|sh >/dev/null 2>&1
fi
if [ x$alias_ip_address != x ]; then
ifconfig $interface inet alias $alias_ip_address $alias_subnet_arg
route add $alias_ip_address 127.0.0.1
fi
exit 0
fi
if [ x$reason = xTIMEOUT ]; then
if [ x$alias_ip_address != x ]; then
ifconfig $interface inet -alias $alias_ip_address > /dev/null 2>&1
route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
fi
ifconfig $interface inet $new_ip_address $new_netmask_arg \
$new_broadcast_arg $medium
sleep 1
set $new_routers
if ping -q -c 1 -w 1 $1; then
if [ x$new_ip_address != x$alias_ip_address ] && \
[ x$alias_ip_address != x ]; then
ifconfig $interface inet alias $alias_ip_address $alias_subnet_arg
route add $alias_ip_address 127.0.0.1
fi
route add $new_ip_address 127.1 >/dev/null 2>&1
for router in $new_routers; do
route add default $router >/dev/null 2>&1
done
echo search $new_domain_name >/etc/resolv.conf.std
for nameserver in $new_domain_name_servers; do
echo nameserver $nameserver >>/etc/resolv.conf.std
done
if [ -f /etc/resolv.conf ]; then
rm -f /etc/resolv.conf
ln /etc/resolv.conf.std /etc/resolv.conf
fi
exit 0
fi
ifconfig $interface inet -alias $new_ip_address $medium
for router in $old_routers; do
route delete default $router >/dev/null 2>&1
done
arp -n -a | sed -n -e 's/^.*(\(.*\)) at .*$/arp -n -d \1/p' \
|sh >/dev/null 2>&1
exit 1
fi
exit 0