HC2VPP-321: bump nat model to ietf-nat@2018-02-23.yang

Uses ietf-nat module as defined in
https://tools.ietf.org/html/draft-ietf-opsawg-nat-yang-14

Modifications to original model:
- ip-address is used instead of ip-prefix
 (draft is not clear, see HC2VPP-325).

API changes relevant to HC/VPP:
- nat-config and nat-state merged into nat container
- nat-instances and nat-instace renamed
  to instances and instance respectively
- external-ip-address-pool has new parent - policy list
- port-type choice was removed, port is now defined using
  start-port-number and end-port-number leaves.
  Missing end is equivalent to single-port-number case from
  the older version.

TODOs:
- HC2VPP-322: single nat64Prefix per NAT instance
- HC2VPP-323: update postman collection
- HC2VPP-324: update CSIT tests.

Out of the scope of NAT model update:
- HC2VPP-326: support for nat-type handling
  (vpp-nat model might become obsolete)
- HC2VPP-327: support external-realm container
  (requires adding augmentations
  that are alredy present in the interface-nat model).

Change-Id: Ie229a55b0a3f6ee3f8c97f4fd13c54a797a62438
Signed-off-by: Marek Gradzki <mgradzki@cisco.com>

1 files changed, 68 insertions, 0 deletions

diff --git a/nat/nat-api/src/main/yang/vpp-nat@2018-05-10.yang b/nat/nat-api/src/main/yang/vpp-nat@2018-05-10.yang
new file mode 100644
index 000000000..375d89936
--- /dev/null
+++ b/nat/nat-api/src/main/yang/vpp-nat@2018-05-10.yang
@@ -0,0 +1,68 @@
+module vpp-nat {
+  yang-version 1;
+  namespace "urn:opendaylight:params:xml:ns:yang:vpp:nat";
+  prefix "vpp-nat";
+
+  import ietf-nat {
+    prefix "nat";
+  }
+  import yang-ext {
+    prefix "ext";
+  }
+
+  organization
+    "FD.io - The Fast Data Project";
+
+  contact
+    "Hc2vpp Wiki <https://wiki.fd.io/view/Hc2vpp>
+     Mailing List <hc2vpp@lists.fd.io>";
+
+  description
+    "This module contains a collection of YANG definitions that extend ietf-nat module
+     with VPP specific features provided by the VPP NAT plugin.
+
+     Copyright (c) 2018 Cisco and/or its affiliates.
+
+     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.";
+
+  revision "2018-05-10" {
+    description "Adapt to ietf-nat@2018-02-23.";
+  }
+
+  revision "2017-08-04" {
+    description "Initial revision of vpp-nat model.";
+  }
+
+  typedef nat-pool-type {
+    type enumeration {
+      enum "nat44";
+      enum "nat64";
+    }
+  }
+
+  grouping external-ip-address-pool-vpp-attributes {
+    leaf pool-type {
+      type nat-pool-type;
+      description
+        "Indicates whether the pool is designated to be used for nat44 or nat64.";
+      reference
+        "https://git.fd.io/vpp/tree/src/plugins/nat/nat.api";
+    }
+  }
+
+  augment /nat:nat/nat:instances/nat:instance/nat:policy/nat:external-ip-address-pool {
+    ext:augment-identifier "external-ip-address-pool-augmentation";
+
+    uses external-ip-address-pool-vpp-attributes;
+  }
+}
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