Fixed #811 -- Added support for IPv6 to forms and model fields. Many thanks to Erik Romijn.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16366 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/ref/forms/fields.txt

@@ -622,6 +622,45 @@ Takes two optional arguments for validation:
       expression.
     * Error message keys: ``required``, ``invalid``
 
+``GenericIPAddressField``
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. class:: GenericIPAddressField(**kwargs)
+
+.. versionadded:: 1.4
+
+A field containing either an IPv4 or an IPv6 address.
+
+    * Default widget: ``TextInput``
+    * Empty value: ``''`` (an empty string)
+    * Normalizes to: A Unicode object. IPv6 addresses are
+      normalized as described below.
+    * Validates that the given value is a valid IP address.
+    * Error message keys: ``required``, ``invalid``
+
+The IPv6 address normalization follows `RFC4291 section 2.2`_, including using
+the IPv4 format suggested in paragraph 3 of that section, like
+``::ffff:192.0.2.0``. For example, ``2001:0::0:01`` would be normalized to
+``2001::1``, and ``::ffff:0a0a:0a0a`` to ``::ffff:10.10.10.10``. All
+characters are converted to lowercase.
+
+.. _RFC4291 section 2.2: http://tools.ietf.org/html/rfc4291#section-2.2
+
+Takes two optional arguments:
+
+.. attribute:: GenericIPAddressField.protocol
+
+    Limits valid inputs to the specified protocol.
+    Accepted values are ``both`` (default), ``IPv4``
+    or ``IPv6``. Matching is case insensitive.
+
+.. attribute:: GenericIPAddressField.unpack_ipv4
+
+    Unpacks IPv4 mapped addresses like ``::ffff::192.0.2.1``.
+    If this option is enabled that address would be unpacked to
+    ``192.0.2.1``. Default is disabled. Can only be used
+    when ``protocol`` is set to ``'both'``.
+
 ``MultipleChoiceField``
 ~~~~~~~~~~~~~~~~~~~~~~~