I was looking at this module, and noticed a couple of short-comings.
(1) it doesn't return a failure code, only blurts a message via "confess"
with things go wrong;
(2) it doesn't allow you to save a pointer into each address block/range
and then retrieve it later and allow you to use it as a cookie or a
handle
to another object.
(3) it doesn't allow you to insert "0.0.0.0/0" into the list.
These are issues that will need to be resolved before this package is
more generally useful.
I wanted to put a prototype filter up on the wiki, but adding workarounds
to these deficiences in Net::CIDR::Lite ended up being almost as long as
the "useful" part of the filter itself.
Anyone want to work with me on getting patches worked out, tested,
and integrated into the next version? I can attach what I've done so far...
-Philip
*** Lite.pm.bak 2005-05-21 01:53:57.0 -0600
--- Lite.pm 2006-01-14 17:59:28.0 -0700
***
*** 2,14
use strict;
use vars qw($VERSION);
- use Carp qw(confess);
$VERSION = '0.18';
my %masks;
my @fields = qw(PACK UNPACK NBITS MASKS);
# Preloaded methods go here.
sub new {
--- 2,15
use strict;
use vars qw($VERSION);
$VERSION = '0.18';
my %masks;
my @fields = qw(PACK UNPACK NBITS MASKS);
+ my $errstr = '';
+
# Preloaded methods go here.
sub new {
***
*** 35,46
sub add {
my $self = shift;
my ($ip, $mask) = split "/", shift;
! $self->_init($ip) || confess "Can't determine ip format" unless %$self;
! confess "Bad mask $mask"
! unless $mask =~ /^\d+$/ and 2 <= $mask and $mask <= $self->{NBITS};
$mask += 8;
! my $start = $self->{PACK}->($ip) & $self->{MASKS}[$mask]
! or confess "Bad ip address: $ip";
my $end = $self->_add_bit($start, $mask);
++$$self{RANGES}{$start} || delete $$self{RANGES}{$start};
--$$self{RANGES}{$end} || delete $$self{RANGES}{$end};
--- 36,56
sub add {
my $self = shift;
my ($ip, $mask) = split "/", shift;
! unless ($self->_init($ip) || %$self) {
! $errstr = "Can't determine ip format";
! return undef;
! }
!
! unless ($mask =~ /^\d+$/ and 2 <= $mask and $mask <= $self->{NBITS}) {
! $errstr = "Bad mask $mask";
! return undef;
! }
$mask += 8;
! my $start = $self->{PACK}->($ip) & $self->{MASKS}[$mask];
! unless ($start) {
! $errstr = "Bad IP address: $ip";
! return undef;
! }
my $end = $self->_add_bit($start, $mask);
++$$self{RANGES}{$start} || delete $$self{RANGES}{$start};
--$$self{RANGES}{$end} || delete $$self{RANGES}{$end};
***
*** 181,188
sub add_ip {
my $self = shift;
my $ip = shift;
! $self->_init($ip) || confess "Can't determine ip format" unless %$self;
! my $start = $self->{PACK}->($ip) or confess "Bad ip address: $ip";
my $end = $self->_add_bit($start, $self->{NBITS});
++$$self{RANGES}{$start} || delete $$self{RANGES}{$start};
--$$self{RANGES}{$end} || delete $$self{RANGES}{$end};
--- 191,205
sub add_ip {
my $self = shift;
my $ip = shift;
! unless ($self->_init($ip) || %$self) {
! $errstr = "Can't determine ip format";
! return undef;
! }
! my $start = $self->{PACK}->($ip);
! unless ($start) {
! $errstr = "Bad IP address: $ip";
! return undef;
! }
my $end = $self->_add_bit($start, $self->{NBITS});
++$$self{RANGES}{$start} || delete $$self{RANGES}{$start};
--$$self{RANGES}{$end} || delete $$self{RANGES}{$end};
***
*** 194,207
my $self = shift;
local $_ = shift;
my ($ip_start, $ip_end, $crud) = split /\s*-\s*/;
! confess "Only one hyphen allowed in range" if defined $crud;
! $self->_init($ip_start) || confess "Can't determine ip format"
! unless %$self;
! my $start = $self->{PACK}->($ip_start)
! or confess "Bad ip address: $ip_start";
! my $end = $self->{PACK}->($ip_end)
! or confess "Bad ip address: $ip_end";
! confess "Start IP is greater than end IP" if $start gt $end;
$end = $self->_add_bit($end, $$self{NBITS});
++$$self{RANGES}{$start} || delete $$self{RANGES}{$start};
--$$self{RANGES}{$end} || delete $$self{RANGES}{$end};
--- 211,238
my $self = shift;
local $_ = shift;
my ($ip_start, $ip_end, $crud) = split /\s*-\s*/;
! if (defined $crud) {
! $errstr = "Only one hyphen allowed in range";
! return undef;
! }
! unless ($self->_init($ip_start) || %$self) {
! $errstr = "Can't determine ip format";
! return undef;
! }
! my $start = $self->{PACK}->($ip_start);
! unless ($start) {
! $errstr = "Bad IP address: $ip_start";
! return undef;
! }
! my $end = $self->{PACK}->($ip_end);
! unless ($end) {
! $errstr = "Ba
