ineter

What?

ineter (pronounced "Eye-netter") is a tiny Java library for working with:

• Individual IP addresses - IPv4Address, IPv6Address/ZonedIPv6Address
• IP address ranges - IPv4Range, IPv6Range
• IP subnets - IPv4Subnet, IPv6Subnet

Why?

• Low memory (and GC) footprint: ineter uses primitive types to represent addresses - an int for IPv4, two long fields for IPv6. For comparison, Java's InetAddress uses an InetAddressHolder with two String fields and two int fields just for IPv4
• Immutability: ineter is immutable and thread-safe by default
• Speed: ineter is written with performance in mind
• Rich set of supported operations
• MPL-2.0 license, allowing commercial use as well as re-licensing under GNU

Where?

Maven:

<dependency>
	<groupId>com.github.maltalex</groupId>
	<artifactId>ineter</artifactId>
	<version>0.2.0</version>
</dependency>

Gradle:

compile 'com.github.maltalex:ineter:0.2.0'

How?

Individual IPv4/IPv6 addresses

IPv4Address ipv4 = IPv4Address.of("10.0.0.1");
IPv6Address ipv6 = IPv6Address.of("2001:🔢4321");

ipv4.isPrivate(); // true
ipv4.isMulticast(); // false
ipv6.isGlobalUnicast(); // true
ipv4.compareTo(IPv4Address.of(0x0a000001)); // addresses are comparable
ipv6.toInetAddress(); // addresses can be converted to other forms
ipv6.toSubnet(); // IPv6Address as a single /128 subnet
ipv4.plus(5); // 10.0.0.6
ipv4.distanceTo(IPv4Address.of("10.0.0.100")); // 99
ipv4.previous(); // 10.0.0.0

Arbitrary address ranges

IPv4Range ipv4Range = IPv4Range.parse("192.168.100.0-192.168.101.127");
IPv6Range ipv6Range = IPv6Range.of("2001::","2001::1000"); //Build using first and last address
IPv6Range singletonRange = IPv6Range.parse("2002::"); // A single address in range form

ipv6Range.contains(IPv6Address.of("2001::1000")); //true
ipv4Range.overlaps(IPv4Range.of("10.0.0.1", "10.0.0.10")); //false
ipv4Range.toSubnets(); // Returns the list of subnets that make up the range
ipv4Range.withLast(IPv4Address.of("192.168.102.0")); //range with different last address
ipv6Range.length(); //4097
IPv6Range.merge(ipv6Range, singletonRange); //ranges can be merged

Subnets

IPv4Subnet ipv4Subnet = IPv4Subnet.of("192.168.0.0/16");
IPv6Range ipv6Subnet = IPv6Range.parse("2001::/64"); // subnets are ranges too!

ipv4Subnet.getNetworkMask(); //255.255.0.0
ipv4Subnet.getNetworkBitCount(); //16