#!/bin/sh if [ -x /usr/bin/logger ]; then LOGGER="/usr/bin/logger -s -p user.notice -t dhclient" else LOGGER=echo fi make_resolv_conf() { if [ x"$new_domain_name_servers" != x ]; then rm -f /var/etc/nameservers.inet.conf for nameserver in $new_domain_name_servers; do echo $nameserver >>/var/etc/nameservers.inet.conf done fi } # Must be used on exit. Invokes the local dhcp client exit hooks, if any. exit_with_hooks() { exit_status=$1 if [ -f /etc/dhclient-exit-hooks ]; then . /etc/dhclient-exit-hooks fi # probably should do something with exit status of the local script exit $exit_status } # Invoke the local dhcp client enter hooks, if they exist. if [ -f /etc/dhclient-enter-hooks ]; then exit_status=0 . /etc/dhclient-enter-hooks # allow the local script to abort processing of this state # local script must set exit_status variable to nonzero. if [ $exit_status -ne 0 ]; then exit $exit_status fi fi if [ x$new_network_number != x ]; then $LOGGER New Network Number: $new_network_number fi if [ x$new_broadcast_address != x ]; then $LOGGER New Broadcast Address: $new_broadcast_address 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 eval "ifconfig $interface $medium" eval "ifconfig $interface inet -alias 0.0.0.0 $medium" >/dev/null 2>&1 sleep 1 exit 0 fi if [ x$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 eval "ifconfig $interface inet -alias $old_ip_address $medium" route delete $old_ip_address 127.0.0.1 >/dev/null 2>&1 for router in $old_routers; do route delete default $router >/dev/null 2>&1 done if [ -n "$old_static_routes" ]; then set -- $old_static_routes while [ $# -gt 1 ]; do route delete $1 $2 shift; shift done fi arp -a -d >/dev/null 2>&1 fi if [ x$old_ip_address = x ] || [ x$old_ip_address != x$new_ip_address ] || \ [ x$reason = xBOUND ] || [ x$reason = xREBOOT ]; then eval "ifconfig $interface inet $new_ip_address $new_netmask_arg \ $new_broadcast_arg $medium" $LOGGER "New IP Address ($interface): $new_ip_address" $LOGGER "New Subnet Mask ($interface): $new_subnet_mask" $LOGGER "New Broadcast Address ($interface): $new_broadcast_address" if [ -n "$new_routers" ]; then $LOGGER "New Routers: $new_routers" fi route add $new_ip_address 127.0.0.1 >/dev/null 2>&1 for router in $new_routers; do route add default $router >/dev/null 2>&1 done if [ -n "$new_static_routes" ]; then $LOGGER "New Static Routes: $new_static_routes" set -- $new_static_routes while [ $# -gt 1 ]; do route add $1 $2 shift; shift done fi if [ x"$new_ip_address" = x"$new_routers" ]; then route delete default >/dev/null 2>&1 route add default -interface -link $interface >/dev/null 2>&1 fi fi if [ x$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 $alias_ip_address 127.0.0.1 fi make_resolv_conf exit_with_hooks 0 fi if [ x$reason = xEXPIRE ] || [ x$reason = xFAIL ] || [ x$reason = xRELEASE ] \ || [ x$reason = xSTOP ]; then if [ x$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 eval "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 $router >/dev/null 2>&1 done if [ -n "$old_static_routes" ]; then set -- $old_static_routes while [ $# -gt 1 ]; do route delete $1 $2 shift; shift done fi arp -a -d >/dev/null 2>&1 fi if [ x$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 eval "ifconfig $interface inet $new_ip_address $new_netmask_arg \ $new_broadcast_arg $medium" $LOGGER "New IP Address ($interface): $new_ip_address" $LOGGER "New Subnet Mask ($interface): $new_subnet_mask" $LOGGER "New Broadcast Address ($interface): $new_broadcast_address" sleep 1 if [ -n "$new_routers" ]; then $LOGGER "New Routers: $new_routers" set -- $new_routers if ping -q -c 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 set -- $new_static_routes while [ $# -gt 1 ]; do route add $1 $2 shift; shift done make_resolv_conf exit 0 fi fi eval "ifconfig $interface inet -alias $new_ip_address $medium" for router in $old_routers; do route delete default $router >/dev/null 2>&1 done if [ -n "$old_static_routes" ]; then set -- $old_static_routes while [ $# -gt 1 ]; do route delete $1 $2 shift; shift done fi arp -a -d >/dev/null 2>&1 exit 1 fi exit 0