1Lite(3) User Contributed Perl Documentation Lite(3)
2
6 Net::CIDR::Lite - Perl extension for merging IPv4 or IPv6 CIDR
7 addresses
8
10 use Net::CIDR::Lite;
11 my $cidr = Net::CIDR::Lite->new;
13 $cidr->add($cidr_address);
14 @cidr_list = $cidr->list;
15 @ip_ranges = $cidr->list_range;
16
18 Faster alternative to Net::CIDR when merging a large number of CIDR
19 address ranges. Works for IPv4 and IPv6 addresses.
20
22 new()
23 $cidr = Net::CIDR::Lite->new
24 $cidr = Net::CIDR::Lite->new(@args)
25 Creates an object to represent a list of CIDR address ranges. No
27 particular format is set yet; once an add method is called with a
28 IPv4 or IPv6 format, only that format may be added for this cidr
29 object. Any arguments supplied are passed to add_any() (see below).
30 add()
32 $cidr->add($cidr_address)
33 Adds a CIDR address range to the list.
35 add_range()
37 $cidr->add_range($ip_range)
38 Adds a hyphenated IP address range to the list.
40 add_cidr()
42 $cidr1->add_cidr($cidr2)
43 Adds address ranges from one object to another object.
45 add_ip()
47 $cidr->add_ip($ip_address)
48 Adds a single IP address to the list.
50 add_any()
52 $cidr->add_any($cidr_or_range_or_address);
53 Determines format of range or single ip address and calls add(),
55 add_range(), add_cidr(), or add_ip() as appropriate.
56 $cidr->clean()
58 $cidr->clean;
59 If you are going to call the list method more than once on the same
61 data, then for optimal performance, you can call this to purge null
62 nodes in overlapping ranges from the list. Boundary nodes in
63 contiguous ranges are automatically purged during add(). Only
64 useful when ranges overlap or when contiguous ranges are added out
65 of order.
66 $cidr->list()
68 @cidr_list = $cidr->list;
69 $list_ref = $cidr->list;
70 Returns a list of the merged CIDR addresses. Returns an array if
72 called in list context, an array reference if not.
73 $cidr->list_range()
75 @cidr_list = $cidr->list_range;
76 $list_ref = $cidr->list_range;
77 Returns a list of the merged addresses, but in hyphenated range
79 format. Returns an array if called in list context, an array
80 reference if not.
81 $cidr->list_short_range()
83 @cidr_list = $cidr->list_short_range;
84 $list_ref = $cidr->list_short_range;
85 Returns a list of the C subnet merged addresses, in short
87 hyphenated range format. Returns an array if called in list
88 context, an array reference if not.
89 Example:
91 1.1.1.1-2
93 1.1.1.5-7
94 1.1.1.254-255
95 1.1.2.0-2
96 1.1.3.5
97 1.1.3.7
98 $cidr->find()
100 $found = $cidr->find($ip);
101 Returns true if the ip address is found in the CIDR range. False if
103 not. Not extremely efficient, is O(n*log(n)) to sort the ranges in
104 the cidr object O(n) to search through the ranges in the cidr
105 object. The sort is cached on the first call and used in
106 subsequent calls, but if more addresses are added to the cidr
107 object, prep_find() must be called on the cidr object.
108 $cidr->bin_find()
110 Same as find(), but forces a binary search. See also prep_find.
111 $cidr->prep_find()
113 $cidr->prep_find($num);
114 Caches the result of sorting the ip addresses. Implicitly called on
116 the first find call, but must be explicitly called if more
117 addresses are added to the cidr object. find() will do a binary
118 search if the number of ranges is greater than or equal to $num
119 (default 20);
120 $cidr->spanner()
122 $spanner = $cidr1->spanner($label1, $cidr2, $label2, ...);
123 Creates a spanner object to find out if multiple ip addresses are
125 within multiple labeled address ranges. May also be called as (with
126 or without any arguments):
127 Net::CIDR::Lite::Span->new($cidr1, $label1, $cidr2, $label2, ...);
129 $spanner->add()
131 $spanner->add($cidr1, $label1, $cidr2, $label2,...);
132 Adds labeled address ranges to the spanner object. The 'address
134 range' may be a Net::CIDR::Lite object, a single CIDR address
135 range, a single hyphenated IP address range, or a single IP
136 address.
137 $spanner->find()
139 $href = $spanner->find(@ip_addresses);
140 Look up which range(s) ip addresses are in, and return a lookup
142 table of the results, with the keys being the ip addresses, and the
143 value a hash reference of which address ranges the ip address is
144 in.
145 $spanner->bin_find()
147 Same as find(), but forces a binary search. See also prep_find.
148 $spanner->prep_find()
150 $spanner->prep_find($num);
151 Called implicitly the first time $spanner->find(..) is called, must
153 be called again if more cidr objects are added to the spanner
154 object. Will do a binary search if ratio of the number of ip
155 addresses to the number of ranges is less than $num percent
156 (default 4).
157 $spanner->clean()
159 $clean_address = $spanner->clean($ip_address);
160 Validates and returns a cleaned up version of an ip address (which
162 is what you will find as the key in the result from the
163 $spanner->find(..), not necessarily what the original argument
164 looked like). E.g. removes unnecessary leading zeros, removes null
165 blocks from IPv6 addresses, etc.
166
168 Garbage in/garbage out. This module does do validation, but maybe not
169 enough to suit your needs.
170
172 Douglas Wilson, <dougw@cpan.org> w/numerous hints and ideas borrowed
173 from Tye McQueen.
174
176 This module is free software; you can redistribute it and/or
177 modify it under the same terms as Perl itself.
178
180 Net::CIDR.
181perl v5.30.0 2019-07-26 Lite(3)