selftests: openvswitch: Support implicit ipv6 arguments.

The current iteration of IPv6 support requires explicit fields to be set
in addition to not properly support the actual IPv6 addresses properly.
With this change, make it so that the ipv6() bare option is usable to
create wildcarded flows to match broad swaths of ipv6 traffic.

Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Simon Horman <horms@kernel.org>
Signed-off-by: Aaron Conole <aconole@redhat.com>
Link: https://patch.msgid.link/20240625172245.233874-6-aconole@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

tools/testing/selftests/net/openvswitch/ovs-dpctl.py

@@ -200,6 +200,18 @@ def convert_ipv4(data):
 
     return int(ipaddress.IPv4Address(ip)), int(ipaddress.IPv4Address(mask))
 
+def convert_ipv6(data):
+    ip, _, mask = data.partition('/')
+
+    if not ip:
+        ip = mask = 0
+    elif not mask:
+        mask = 'ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff'
+    elif mask.isdigit():
+        mask = ipaddress.IPv6Network("::/" + mask).hostmask
+
+    return ipaddress.IPv6Address(ip).packed, ipaddress.IPv6Address(mask).packed
+
 def convert_int(size):
     def convert_int_sized(data):
         value, _, mask = data.partition('/')
@@ -941,21 +953,21 @@ class ovs_key_ipv6(ovs_key_proto):
                 "src",
                 "src",
                 lambda x: str(ipaddress.IPv6Address(x)),
-                lambda x: int.from_bytes(x, "big"),
-                lambda x: ipaddress.IPv6Address(x),
+                lambda x: ipaddress.IPv6Address(x).packed if x else 0,
+                convert_ipv6,
             ),
             (
                 "dst",
                 "dst",
                 lambda x: str(ipaddress.IPv6Address(x)),
-                lambda x: int.from_bytes(x, "big"),
-                lambda x: ipaddress.IPv6Address(x),
+                lambda x: ipaddress.IPv6Address(x).packed if x else 0,
+                convert_ipv6,
             ),
-            ("label", "label", "%d", int),
-            ("proto", "proto", "%d", int),
-            ("tclass", "tclass", "%d", int),
-            ("hlimit", "hlimit", "%d", int),
-            ("frag", "frag", "%d", int),
+            ("label", "label", "%d", lambda x: int(x) if x else 0),
+            ("proto", "proto", "%d", lambda x: int(x) if x else 0),
+            ("tclass", "tclass", "%d", lambda x: int(x) if x else 0),
+            ("hlimit", "hlimit", "%d", lambda x: int(x) if x else 0),
+            ("frag", "frag", "%d", lambda x: int(x) if x else 0),
         )
 
         def __init__(
@@ -1153,7 +1165,7 @@ class ovs_key_nd(ovs_key_proto):
                 "target",
                 "target",
                 lambda x: str(ipaddress.IPv6Address(x)),
-                lambda x: int.from_bytes(x, "big"),
+                convert_ipv6,
             ),
             ("sll", "sll", macstr, lambda x: int.from_bytes(x, "big")),
             ("tll", "tll", macstr, lambda x: int.from_bytes(x, "big")),
@@ -1238,13 +1250,13 @@ class ovs_key_ct_tuple_ipv6(nla):
                 "src",
                 "src",
                 lambda x: str(ipaddress.IPv6Address(x)),
-                lambda x: int.from_bytes(x, "big", convertmac),
+                convert_ipv6,
             ),
             (
                 "dst",
                 "dst",
                 lambda x: str(ipaddress.IPv6Address(x)),
-                lambda x: int.from_bytes(x, "big"),
+                convert_ipv6,
             ),
             ("tp_src", "tp_src", "%d", int),
             ("tp_dst", "tp_dst", "%d", int),