Add first approximation of vxlan_tunnels

validator/vxlan_tunnel.py

@@ -0,0 +1,57 @@
+#
+# Copyright (c) 2022 Pim van Pelt
+#
+# Licensed 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.
+#
+import logging
+import validator.interface as interface
+
+class NullHandler(logging.Handler):
+    def emit(self, record):
+        pass
+
+
+def get_by_name(yaml, ifname):
+    """ Return the VXLAN by name, if it exists. Return None otherwise. """
+    try:
+        if ifname in yaml['vxlan_tunnels']:
+            return yaml['vxlan_tunnels'][ifname]
+    except:
+        pass
+    return None
+
+def vni_unique(yaml, vni):
+    """ Return True if the VNI is unique amongst all VXLANs """
+    if not 'vxlan_tunnels' in yaml:
+        return True
+
+    ncount = 0
+    for ifname, iface in yaml['vxlan_tunnels'].items():
+        if iface['vni'] == vni:
+            ncount = ncount + 1
+
+    if ncount > 1:
+        return False
+    return True
+
+
+def validate_vxlan_tunnels(yaml):
+    result = True
+    msgs = []
+    logger = logging.getLogger('vppcfg.validator')
+    logger.addHandler(NullHandler())
+
+    if not 'vxlan_tunnels' in yaml:
+        return result, msgs
+
+    for ifname, iface in yaml['vxlan_tunnels'].items():
+        logger.debug("vxlan_tunnel %s: %s" % (ifname, iface))
+    return result, msgs