[PATCH net-next v2 4/7] tools/net/ynl: accept IP string inputs

[Donald Hunter <donald.hunter@gmail.com>]

The ynl tool uses display-hint to know when to format IP addresses in
printed output, but not to parse IP addresses from --json input. Add
support for parsing ipv4 and ipv6 strings.

Signed-off-by: Donald Hunter <donald.hunter@gmail.com>
---
 tools/net/ynl/lib/ynl.py | 25 +++++++++++++++++++++----
 1 file changed, 21 insertions(+), 4 deletions(-)

diff --git a/tools/net/ynl/lib/ynl.py b/tools/net/ynl/lib/ynl.py
index 08ad2d8a874e..c9ed356d7ed2 100644
--- a/tools/net/ynl/lib/ynl.py
+++ b/tools/net/ynl/lib/ynl.py
@@ -536,9 +536,11 @@ class YnlFamily(SpecFamily):
         try:
             return int(value)
         except (ValueError, TypeError) as e:
-            if 'enum' not in attr_spec:
-                raise e
-        return self._encode_enum(attr_spec, value)
+            if 'enum' in attr_spec:
+                return self._encode_enum(attr_spec, value)
+            if attr_spec.display_hint:
+                return self._from_string(value, attr_spec)
+            raise e
 
     def _add_attr(self, space, name, value, search_attrs):
         try:
@@ -571,7 +573,10 @@ class YnlFamily(SpecFamily):
             if isinstance(value, bytes):
                 attr_payload = value
             elif isinstance(value, str):
-                attr_payload = bytes.fromhex(value)
+                if attr.display_hint:
+                    attr_payload = self._from_string(value, attr)
+                else:
+                    attr_payload = bytes.fromhex(value)
             elif isinstance(value, dict) and attr.struct_name:
                 attr_payload = self._encode_struct(attr.struct_name, value)
             else:
@@ -901,6 +906,18 @@ class YnlFamily(SpecFamily):
             formatted = raw
         return formatted
 
+    def _from_string(self, string, attr_spec):
+        if attr_spec.display_hint in ['ipv4', 'ipv6']:
+            ip = ipaddress.ip_address(string)
+            if attr_spec['type'] == 'binary':
+                raw = ip.packed
+            else:
+                raw = int(ip)
+        else:
+            raise Exception(f"Display hint '{attr_spec.display_hint}' not implemented"
+                            f" when parsing '{attr_spec['name']}'")
+        return raw
+
     def handle_ntf(self, decoded):
         msg = dict()
         if self.include_raw:
-- 
2.47.1