GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  NETADDR::IP::COUNT (3)

.ds Aq ’

NAME

NetAddr::IP::Count - Count hosts in named subnets

CONTENTS

SYNOPSIS



  use NetAddr::IP::Count;
  use NetAddr::IP;

  my $counter = new NetAddr::IP::Count;

  $counter->add(subnet-00, new NetAddr::IP("10.0.0.0/24"));
  $counter->add(other, @array_of_ip_addresses);
  $counter->add(other, @another_array_of_ip_addresses);

  $counter->cache(10);

  $counter->count(new NetAddr::IP("10.0.3.17"));
  $counter->count(@array_of_ip_addresses);

  $counter->valcount(new NetAddr::IP("10.0.3.17"), 23);
  @array_of_ipaddr_and_values = (new NetAddr::IP("10.0.3.17"), 23,
                                new NetAddr::IP("101.0.23.107"), 2);
  $counter->valcount(@array_of_ipaddr_and_values);

  my $r_count = $counter->result;

  foreach my $subnet (keys %{$r_count}) {
      print "Subnet $subnet had ", $r_count->{$subnet}, " visits.\n";
  }



DESCRIPTION

This module implements a symplistic way to match individual IP Addresses to subnets. It can be used to, among other things, help analyze HTTPD logs.

The following methods are implemented.
->new Creates a new counter. This method can be called passing as argument a hash where the keys are the name of the subnet group and the values are references to arrays of NetAddr::IP objects referencing each specific subnet. This is probably ok for static initializations.
->add Adds a subnet group. The first parameter is the name of the group being added. If it’s a new name, a new entry will be created. Else the given subnets are added to the existing ones, like in the example above.
->count Verifies if the NetAddr::IPes are contained in any of the given subnets. If this is the case, the corresponding totals are updated.
->valcount The same as ->count but the argument is an array consisting of NetAddr::IPes and value pairs.
->result Returns a reference to a hash containing the respective totals for each subnet group. The key to the hash is the subnet name given with ->add, the value is how many NetAddr::IP objects have been found to match that subnet group.
->cache Since in usual applications NetAddr::IPes from the same subnet will tend to be grouped in clusters like in the case of HTTPD logs some caching is attempted to speed things up. The caching consists in storing the last few entries matched in an LRU list which is checked before going through all the stored subnets.

This can improve response times if tuned sensibly, however consider that every miss will cause every entry in the cache to be checked twice, one in the cache and one in the normal process so it’s important to tune the cache.

The default cache size is 5, which can be changed by calling the ->cache method as in the example. The old value of the cache size is returned.

AUTHOR

Luis E. Munoz <lem@cantv.net>. Alvaro Carvajal <alvaro@cantv.net> contributed the valcount method.

SEE ALSO

perl(1), NetAddr::IP(1).
Search for    or go to Top of page |  Section 3 |  Main Index


perl v5.20.3 COUNT (3) 2001-10-08

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.