use Net::IPv4Addr qw( :all );
my ($ip,$cidr) = ipv4_parse( "127.0.0.1/24" );
my ($ip,$cidr) = ipv4_parse( "192.168.100.10 / 255.255.255.0" );
my ($net,$msk) = ipv4_network( "192.168.100.30" );
my $broadcast = ipv4_broadcast( "192.168.100.30/26" );
if ( ipv4_in_network( "192.168.100.0", $her_ip ) ) {
print "Welcome !";
}
etc.
All these addresses would be accepted:
127.0.0.1
192.168.001.010/24
192.168.10.10/255.255.255.0
192.168.30.10 / 21
10.0.0.0 / 255.0.0.0
255.255.0.0
Those wouldn't though:
272.135.234.0
192.168/16
Most functions accepts the address and netmask or masklength in the same scalar value or as separate values. That is either
my($ip,$masklength) = ipv4_parse($cidr_str);
my($ip,$masklength) = ipv4_parse($ip_str,$msk_str);
my ($ip,$msklen) = ipv4_parse($cidr_str);
my $cidr = ipv4_parse($ip_str,$msk_str);
my ($ip) = ipv4_parse($ip_str,$msk_str);
Parse an IPv4 address and in scalar context the address in CIDR format and in an array context the address and the mask length.
If the parameters doesn't contains a netmask or a mask length, in scalar context only the IPv4 address is returned and in an array context the mask length is undefined.
If the function cannot parse its input, it croaks. Trap it using "eval" if don't like that.
my $cidr = ipv4_network($ip_str);
my $cidr = ipv4_network($cidr_str);
my ($net,$msk) = ipv4_network( $net_str, $msk_str);
In scalar context, this function returns the network in CIDR format in which the address is. In array context, it returns the network address and its mask length as a two elements array. If the input is an host without a netmask of mask length, the default netmask is assumed.
Again, the function croak if the input is invalid.
my ($broadcast) = ipv4_broadcast($ip_str);
my $broadcast = ipv4_broadcast($ip_str,$msk_str);
This function returns the broadcast address. If the input doesn't contains a netmask or mask length, the default netmask is assumed.
This function croaks if the input is invalid.
my $cidr = ipv4_network($net_str);
my $cidr = ipv4_network($cidr_sstr);
my ($net,$msk) = ipv4_network( $ip_str, $mask_str);
In scalar context, this function returns the network in CIDR format in which the address is. In array context, it returns the network address and its mask length as a two elements array. If the input is an host without a netmask or mask length, the default netmask is assumed.
Again, the function croak if the input is invalid.
print "Yes" if ipv4_in_network( $cidr_str1, $cidr_str2);
print "Yes" if ipv4_in_network( $ip_str1, $mask_str1, $cidr_str2 );
print "Yes" if ipv4_in_network( $ip1, $mask1, $ip2, $msk2 );
This function checks if the second network is contained in the first one and it implements the following semantics :
If net1 or net2 is a magic address (0.0.0.0 or 255.255.255.255) than this function returns true. If net1 is an host, net2 will be in the same net only if it is the same host. If net2 is an host, it will be contained in net1 only if it is part of net1. If net2 is only part of net1 if it is entirely contained in net1.
Trap bad input with "eval" or else.
if ($ip = ipv4_checkip($str) ) {
# Do something
}
Return the IPv4 address in the string or undef if the input doesn't contains a valid IPv4 address.
my $netmask = ipv4_cidr2msk( $cidr );
Returns the netmask corresponding to the mask length given in input. As usual, croaks if it doesn't like your input (in this case a number between 0 and 32).
my $masklen = ipv4_msk2cidr( $msk );
Returns the mask length of the netmask in input. As usual, croaks if it doesn't like your input.
This program is free software; you can redistribute it and/or modify it under the terms as perl itself.