77 lines
2.2 KiB
Java
77 lines
2.2 KiB
Java
/*
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* Copyright © 2017-2019 WireGuard LLC. All Rights Reserved.
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* SPDX-License-Identifier: Apache-2.0
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*/
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package com.wireguard.config;
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import java.net.Inet4Address;
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import java.net.InetAddress;
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/**
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* An Internet network, denoted by its address and netmask
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* <p>
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* Instances of this class are immutable.
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*/
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public final class InetNetwork {
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private final InetAddress address;
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private final int mask;
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private InetNetwork(final InetAddress address, final int mask) {
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this.address = address;
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this.mask = mask;
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}
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public static InetNetwork parse(final String network) throws ParseException {
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final int slash = network.lastIndexOf('/');
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final String maskString;
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final int rawMask;
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final String rawAddress;
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if (slash >= 0) {
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maskString = network.substring(slash + 1);
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try {
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rawMask = Integer.parseInt(maskString, 10);
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} catch (final NumberFormatException ignored) {
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throw new ParseException(Integer.class, maskString);
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}
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rawAddress = network.substring(0, slash);
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} else {
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maskString = "";
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rawMask = -1;
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rawAddress = network;
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}
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final InetAddress address = InetAddresses.parse(rawAddress);
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final int maxMask = (address instanceof Inet4Address) ? 32 : 128;
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if (rawMask > maxMask)
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throw new ParseException(InetNetwork.class, maskString, "Invalid network mask");
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final int mask = rawMask >= 0 && rawMask <= maxMask ? rawMask : maxMask;
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return new InetNetwork(address, mask);
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}
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@Override
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public boolean equals(final Object obj) {
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if (!(obj instanceof InetNetwork))
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return false;
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final InetNetwork other = (InetNetwork) obj;
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return address.equals(other.address) && mask == other.mask;
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}
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public InetAddress getAddress() {
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return address;
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}
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public int getMask() {
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return mask;
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}
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@Override
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public int hashCode() {
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return address.hashCode() ^ mask;
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}
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@Override
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public String toString() {
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return address.getHostAddress() + '/' + mask;
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}
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}
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