= dhclient =
Configures network settings based on onformation provided by a DHCP server.

== Slackware settings for classless static routes ==
Adapted from [[http://forums.opensuse.org/english/get-technical-help-here/network-internet/449539-classless-static-routes.html]].

Create file '''/etc/dhclient.conf''':
{{{#!highlight bash
option rfc3442-classless-static-routes code 121 = array of unsigned integer 8; 
option ms-classless-static-routes code 249 = array of unsigned integer 8; 
also request rfc3442-classless-static-routes;
also request ms-classless-static-routes;

send host-name "hostx";
request subnet-mask, broadcast-address, time-offset, routers,
        domain-name, host-name,
        netbios-name-servers, netbios-scope, interface-mtu,
        rfc3442-classless-static-routes, ntp-servers,domain-name-servers;

}}}

Create file '''/etc/dhclient-exit-hooks''':
{{{#!highlight bash
if [ "$new_rfc3442_classless_static_routes" != "" ]; then
if [ "$reason" = "BOUND" ] || [ "$reason" = "REBOOT" ]; then
rfc_routes=($new_rfc3442_classless_static_routes)

for(( i=0; i < ${#rfc_routes[@]}; )); do
net_length=${rfc_routes[$i]}

((i++))

net_address=(0 0 0 0)
for(( j=0; j < $[$net_length / 8 + \
($net_length % 8 ? 1 : 0)]; j++, i++)); do

net_address[$j]=${rfc_routes[$i]}
done

gateway=(0 0 0 0)
for (( j=0; j < 4; j++, i++ )); do
gateway[$j]=${rfc_routes[$i]}
done

old_IFS="$IFS"
IFS='.'
if [ "$net_length" == "32" ]; then
/sbin/route add -host "${net_address[*]}" gw "${gateway[*]}"
else
/sbin/route add -net "${net_address[*]}/$net_length" gw "${gateway[*]}"
fi
IFS="$old_IFS"

done
fi
fi
}}}

To get and apply settings run '''dhclient eth0 -v''' for eth0 interface.

Add to '''/etc/rc.d/rc.local'''
{{{
/sbin/dhclient -v eth0
}}}