Migrate tunnel related classes to tunnel/ Gradle module

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>
2020-03-09 19:24:26 +05:30
parent fd573f6c1c
commit adc613d801
42 changed files with 76 additions and 44 deletions
@@ -0,0 +1,76 @@
+/*
+ * Copyright © 2017-2019 WireGuard LLC. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package com.wireguard.config;
+
+import java.net.Inet4Address;
+import java.net.InetAddress;
+
+/**
+ * An Internet network, denoted by its address and netmask
+ * <p>
+ * Instances of this class are immutable.
+ */
+public final class InetNetwork {
+    private final InetAddress address;
+    private final int mask;
+
+    private InetNetwork(final InetAddress address, final int mask) {
+        this.address = address;
+        this.mask = mask;
+    }
+
+    public static InetNetwork parse(final String network) throws ParseException {
+        final int slash = network.lastIndexOf('/');
+        final String maskString;
+        final int rawMask;
+        final String rawAddress;
+        if (slash >= 0) {
+            maskString = network.substring(slash + 1);
+            try {
+                rawMask = Integer.parseInt(maskString, 10);
+            } catch (final NumberFormatException ignored) {
+                throw new ParseException(Integer.class, maskString);
+            }
+            rawAddress = network.substring(0, slash);
+        } else {
+            maskString = "";
+            rawMask = -1;
+            rawAddress = network;
+        }
+        final InetAddress address = InetAddresses.parse(rawAddress);
+        final int maxMask = (address instanceof Inet4Address) ? 32 : 128;
+        if (rawMask > maxMask)
+            throw new ParseException(InetNetwork.class, maskString, "Invalid network mask");
+        final int mask = rawMask >= 0 && rawMask <= maxMask ? rawMask : maxMask;
+        return new InetNetwork(address, mask);
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (!(obj instanceof InetNetwork))
+            return false;
+        final InetNetwork other = (InetNetwork) obj;
+        return address.equals(other.address) && mask == other.mask;
+    }
+
+    public InetAddress getAddress() {
+        return address;
+    }
+
+    public int getMask() {
+        return mask;
+    }
+
+    @Override
+    public int hashCode() {
+        return address.hashCode() ^ mask;
+    }
+
+    @Override
+    public String toString() {
+        return address.getHostAddress() + '/' + mask;
+    }
+}