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-rw-r--r--src/com/isode/stroke/network/HostAddress.java70
1 files changed, 64 insertions, 6 deletions
diff --git a/src/com/isode/stroke/network/HostAddress.java b/src/com/isode/stroke/network/HostAddress.java
index a8eea1b..dae2558 100644
--- a/src/com/isode/stroke/network/HostAddress.java
+++ b/src/com/isode/stroke/network/HostAddress.java
@@ -4,13 +4,14 @@
* See Documentation/Licenses/GPLv3.txt for more information.
*/
/*
- * Copyright (c) 2010, Isode Limited, London, England.
+ * Copyright (c) 2010-2016, Isode Limited, London, England.
* All rights reserved.
*/
package com.isode.stroke.network;
import java.net.InetAddress;
import java.net.UnknownHostException;
+import java.util.regex.Pattern;
public class HostAddress {
@@ -19,11 +20,15 @@ public class HostAddress {
}
public HostAddress(String address) {
- try {
- address_ = InetAddress.getByName(address);
- }
- catch (UnknownHostException e) {
- address_ = null;
+ // To match C++ code this should try and create a InetAddress
+ // if and only if the input is a IPv4 or IPv6 address.
+ if (isIPv4OrIPv6Address(address)) {
+ try {
+ address_ = InetAddress.getByName(address);
+ }
+ catch (UnknownHostException e) {
+ address_ = null;
+ }
}
}
@@ -86,4 +91,57 @@ public class HostAddress {
}
private InetAddress address_;
+
+ /**
+ * Indicates if the value is an IPv4 address in dot notation or
+ * an IPv6 address in hexadecimal notation
+ * @param value A string to test. If {@code null} result will
+ * be false.
+ * @return {@code true} if the string is an IPv4 address in dot
+ * notation, or a IPv6 address in hexadecimal notation.
+ */
+ private static boolean isIPv4OrIPv6Address(String value) {
+ if (value == null) {
+ return false;
+ }
+ if (ipv4Pattern.matcher(value).matches()) {
+ return true;
+ }
+ if (ipv6Pattern.matcher(value).matches()) {
+ return true;
+ }
+ return false;
+ }
+
+ /**
+ * Regular expression for IPv4 address.
+ *
+ * @see <a href="http://www.mkyong.com/regular-expressions/how-to-validate-ip-address-with-regular-expression/"> web link</a>
+ */
+ private static final String ipv4Regex =
+ "^([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\."
+ + "([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\."
+ + "([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\."
+ + "([01]?\\d\\d?|2[0-4]\\d|25[0-5])$";
+ /**
+ * A pattern that can be used to match an IPv4 address (e.g. "1.2.3.4").
+ *
+ */
+ private static final Pattern ipv4Pattern = Pattern.compile(ipv4Regex);
+
+ /**
+ * Regular expression for IPv6 address. Note that this needs to be
+ * compiled with the CASE_INSENSITIVE option.
+ */
+ private static final String ipv6Regex =
+ "^(((?=(?>.*?::)(?!.*::)))(::)?([0-9A-F]{1,4}::?){0,5}"
+ + "|([0-9A-F]{1,4}:){6})(\\2([0-9A-F]{1,4}(::?|$)){0,2}"
+ + "|((25[0-5]|(2[0-4]|1\\d|[1-9])?\\d)(\\.|$)){4}"
+ + "|[0-9A-F]{1,4}:[0-9A-F]{1,4})(?<![^:]:|\\.)\\z";
+
+ /**
+ * A pattern that can be used to match an IPv6 address (e.g. "3ffe:1900:4545:3:200:f8ff:fe21:67cf").
+ */
+ private static final Pattern ipv6Pattern = Pattern.compile(ipv6Regex, Pattern.CASE_INSENSITIVE);
+
}