Fixed ipv6 pattern in parse_address (#84237)

changelogs/fragments/fix-ipv6-pattern.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - Fix ipv6 pattern bug in lib/ansible/parsing/utils/addresses.py (https://github.com/ansible/ansible/issues/84237)

lib/ansible/parsing/utils/addresses.py

@@ -126,7 +126,7 @@ patterns = {
 
     'ipv6': re.compile(
         r"""^
-            (?:{0}:){{7}}{0}|           # uncompressed: 1:2:3:4:5:6:7:8
+            ((?:{0}:){{7}}{0}|          # uncompressed: 1:2:3:4:5:6:7:8
             (?:{0}:){{1,6}}:|           # compressed variants, which are all
             (?:{0}:)(?::{0}){{1,6}}|    # a::b for various lengths of a,b
             (?:{0}:){{2}}(?::{0}){{1,5}}|
@@ -139,7 +139,7 @@ patterns = {
                                         # ipv4-in-ipv6 variants
             (?:0:){{6}}(?:{0}\.){{3}}{0}|
             ::(?:ffff:)?(?:{0}\.){{3}}{0}|
-            (?:0:){{5}}ffff:(?:{0}\.){{3}}{0}
+            (?:0:){{5}}ffff:(?:{0}\.){{3}}{0})
             $
         """.format(ipv6_component), re.X | re.I
     ),

test/units/parsing/utils/test_addresses.py

@@ -34,6 +34,8 @@ class TestParseAddress(unittest.TestCase):
         '::ffff:1.2.3.4': ['::ffff:1.2.3.4', None],
         '::1.2.3.4': ['::1.2.3.4', None],
         '1234::': ['1234::', None],
+        # Invalid IPv6 address
+        '1234::9abc:def0:1234:5678:9abc::::::::def0': [None, None],
 
         # Hostnames
         'some-host': ['some-host', None],