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Array::IntSpan::IP(3) User Contributed Perl DocumentationArray::IntSpan::IP(3)

       Array::IntSpan::IP - a Module for arrays	using IP addresses as indices

	 use Array::IntSpan::IP;

	 my $foo = Array::IntSpan::IP->new(['',   '', 'Network 1'],
					   ['',   '', 'Network 2'],
					   ['', '', 'Network 3']);

	 print "The address is on network ".$foo->lookup("\173\105\150\45").".\n";
	 unless	(defined($foo->lookup(((123*256+45)*256+65)*256+67))) {
	   print "The address is not on a known network.\n";

	 print "The address is on	network	".$foo->lookup("").".\n";

	 $foo->set_range('', '', 'Network 4');
	 print "The address is now on network ".$foo->lookup("").".\n";

       "Array::IntSpan::IP" brings the advantages of "Array::IntSpan" to IP
       address indices.	 Anywhere you use an index in "Array::IntSpan",	you
       can use an IP address in	one of three forms in "Array::IntSpan::IP".
       The three accepted forms	are:

       Dotted decimal
	   This	is the standard	human-readable format for IP addresses.	 The
	   conversion checks that the octets are in the	range 0-255.  Example:

       Network string
	   A four character string representing	the octets in network order.
	   Example: "\173\105\150\131".

	   A integer value representing	the IP address.	Example:
	   "((123*256+45)*256+67)*256+89" or 2066563929.

       Note that the algorithm has no way of distinguishing between the
       integer values 1000 through 9999	and the	network	string format.	It
       will presume network string format in these instances.  For instance,
       the integer 1234	(representing the address '') will be
       interpreted as "\61\62\63\64", or the IP	address	''.	This
       is unavoidable since Perl does not strongly type	integers and strings
       separately and there is no other	information available to distinguish
       between the two in this situation.  I do	not expect that	this will be a
       problem in most situations. Most	users will probably use	dotted decimal
       or network string notations, and	even if	they do	use the	integer
       notation	the likelyhood that they will be using the addresses
       '' through '' as indices is relatively	low.

       The class method	"Array::IntSpan::IP::ip_as_int"	takes as its one
       parameter the IP	address	in one of the three formats mentioned above
       and returns the integer notation.

       Toby Everett,

perl v5.32.0			  2020-03-27		 Array::IntSpan::IP(3)


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