In Python 3 as simple as >>> import ipaddress >>> [str(ip) for ip in ipaddress.IPv4Network(‘192.0.2.0/28’)] [‘192.0.2.0’, ‘192.0.2.1’, ‘192.0.2.2’, ‘192.0.2.3’, ‘192.0.2.4’, ‘192.0.2.5’, ‘192.0.2.6’, ‘192.0.2.7’, ‘192.0.2.8’, ‘192.0.2.9’, ‘192.0.2.10’, ‘192.0.2.11’, ‘192.0.2.12’, ‘192.0.2.13’, ‘192.0.2.14’, ‘192.0.2.15’]
If you don’t want/can’t add another library (as the IPnetwork one) to your project and just need to deal with IPv4 CIDR ranges, here’s a quick solution to your problem // true if ipAddress falls inside the CIDR range, example // bool result = IsInRange(“10.50.30.7”, “10.0.0.0/8”); private bool IsInRange(string ipAddress, string CIDRmask) { string[] parts … Read more
It is covered by apache utils. See this URL: http://commons.apache.org/proper/commons-net/apidocs/org/apache/commons/net/util/SubnetUtils.html String subnet = “192.168.0.3/31”; SubnetUtils utils = new SubnetUtils(subnet); utils.getInfo().isInRange(address) Note: For use w/ /32 CIDR subnets, for exemple, one needs to add the following declaration : utils.setInclusiveHostCount(true);
If only using IPv4: use ip2long() to convert the IPs and the subnet range into long integers convert the /xx into a subnet mask do a bitwise ‘and’ (i.e. ip & mask)’ and check that that ‘result = subnet’ something like this should work: function cidr_match($ip, $range) { list ($subnet, $bits) = explode(“https://stackoverflow.com/”, $range); if … Read more
Using ipaddress (in the stdlib since 3.3, at PyPi for 2.6/2.7): >>> import ipaddress >>> ipaddress.ip_address(‘192.168.0.1’) in ipaddress.ip_network(‘192.168.0.0/24′) True If you want to evaluate a lot of IP addresses this way, you’ll probably want to calculate the netmask upfront, like n = ipaddress.ip_network(‘192.0.0.0/16’) netw = int(n.network_address) mask = int(n.netmask) Then, for each address, calculate the … Read more