1 files changed, 123 insertions, 0 deletions
diff --git a/mobile/android/thirdparty/ch/boye/httpclientandroidlib/conn/util/InetAddressUtils.java b/mobile/android/thirdparty/ch/boye/httpclientandroidlib/conn/util/InetAddressUtils.java
new file mode 100644
index 000000000..ac9a8e2db
--- /dev/null
+++ b/mobile/android/thirdparty/ch/boye/httpclientandroidlib/conn/util/InetAddressUtils.java
@@ -0,0 +1,123 @@
+/*
+ * ====================================================================
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+
+package ch.boye.httpclientandroidlib.conn.util;
+
+import java.util.regex.Pattern;
+
+import ch.boye.httpclientandroidlib.annotation.Immutable;
+
+/**
+ * A collection of utilities relating to InetAddresses.
+ *
+ * @since 4.0
+ */
+@Immutable
+public class InetAddressUtils {
+
+    private InetAddressUtils() {
+    }
+
+    private static final String IPV4_BASIC_PATTERN_STRING =
+            "(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}" + // initial 3 fields, 0-255 followed by .
+             "([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])"; // final field, 0-255
+
+    private static final Pattern IPV4_PATTERN =
+        Pattern.compile("^" + IPV4_BASIC_PATTERN_STRING + "$");
+
+    private static final Pattern IPV4_MAPPED_IPV6_PATTERN = // TODO does not allow for redundant leading zeros
+            Pattern.compile("^::[fF]{4}:" + IPV4_BASIC_PATTERN_STRING + "$");
+
+    private static final Pattern IPV6_STD_PATTERN =
+        Pattern.compile(
+                "^[0-9a-fA-F]{1,4}(:[0-9a-fA-F]{1,4}){7}$");
+
+    private static final Pattern IPV6_HEX_COMPRESSED_PATTERN =
+        Pattern.compile(
+                "^(([0-9A-Fa-f]{1,4}(:[0-9A-Fa-f]{1,4}){0,5})?)" + // 0-6 hex fields
+                 "::" +
+                 "(([0-9A-Fa-f]{1,4}(:[0-9A-Fa-f]{1,4}){0,5})?)$"); // 0-6 hex fields
+
+    /*
+     *  The above pattern is not totally rigorous as it allows for more than 7 hex fields in total
+     */
+    private static final char COLON_CHAR = ':';
+
+    // Must not have more than 7 colons (i.e. 8 fields)
+    private static final int MAX_COLON_COUNT = 7;
+
+    /**
+     * Checks whether the parameter is a valid IPv4 address
+     *
+     * @param input the address string to check for validity
+     * @return true if the input parameter is a valid IPv4 address
+     */
+    public static boolean isIPv4Address(final String input) {
+        return IPV4_PATTERN.matcher(input).matches();
+    }
+
+    public static boolean isIPv4MappedIPv64Address(final String input) {
+        return IPV4_MAPPED_IPV6_PATTERN.matcher(input).matches();
+    }
+
+    /**
+     * Checks whether the parameter is a valid standard (non-compressed) IPv6 address
+     *
+     * @param input the address string to check for validity
+     * @return true if the input parameter is a valid standard (non-compressed) IPv6 address
+     */
+    public static boolean isIPv6StdAddress(final String input) {
+        return IPV6_STD_PATTERN.matcher(input).matches();
+    }
+
+    /**
+     * Checks whether the parameter is a valid compressed IPv6 address
+     *
+     * @param input the address string to check for validity
+     * @return true if the input parameter is a valid compressed IPv6 address
+     */
+    public static boolean isIPv6HexCompressedAddress(final String input) {
+        int colonCount = 0;
+        for(int i = 0; i < input.length(); i++) {
+            if (input.charAt(i) == COLON_CHAR) {
+                colonCount++;
+            }
+        }
+        return  colonCount <= MAX_COLON_COUNT && IPV6_HEX_COMPRESSED_PATTERN.matcher(input).matches();
+    }
+
+    /**
+     * Checks whether the parameter is a valid IPv6 address (including compressed).
+     *
+     * @param input the address string to check for validity
+     * @return true if the input parameter is a valid standard or compressed IPv6 address
+     */
+    public static boolean isIPv6Address(final String input) {
+        return isIPv6StdAddress(input) || isIPv6HexCompressedAddress(input);
+    }
+
+}