dhclient

   1 option rfc3442-classless-static-routes code 121 = array of unsigned integer 8; 
   2 option ms-classless-static-routes code 249 = array of unsigned integer 8; 
   3 also request rfc3442-classless-static-routes;
   4 also request ms-classless-static-routes;
   5 
   6 send host-name "hostx";
   7 request subnet-mask, broadcast-address, time-offset, routers,
   8         domain-name, host-name,
   9         netbios-name-servers, netbios-scope, interface-mtu,
  10         rfc3442-classless-static-routes, ntp-servers,domain-name-servers;

   1 if [ "$new_rfc3442_classless_static_routes" != "" ]; then
   2 if [ "$reason" = "BOUND" ] || [ "$reason" = "REBOOT" ]; then
   3 rfc_routes=($new_rfc3442_classless_static_routes)
   4 
   5 for(( i=0; i < ${#rfc_routes[@]}; )); do
   6 net_length=${rfc_routes[$i]}
   7 
   8 ((i++))
   9 
  10 net_address=(0 0 0 0)
  11 for(( j=0; j < $[$net_length / 8 + \
  12 ($net_length % 8 ? 1 : 0)]; j++, i++)); do
  13 
  14 net_address[$j]=${rfc_routes[$i]}
  15 done
  16 
  17 gateway=(0 0 0 0)
  18 for (( j=0; j < 4; j++, i++ )); do
  19 gateway[$j]=${rfc_routes[$i]}
  20 done
  21 
  22 old_IFS="$IFS"
  23 IFS='.'
  24 if [ "$net_length" == "32" ]; then
  25 /sbin/route add -host "${net_address[*]}" gw "${gateway[*]}"
  26 else
  27 /sbin/route add -net "${net_address[*]}/$net_length" gw "${gateway[*]}"
  28 fi
  29 IFS="$old_IFS"
  30 
  31 done
  32 fi
  33 fi