CSIT-482: HC Test - NAT

 - add NAT test suite
 - add keywords and methods for configuring and reading NAT settings
 - add test data used in NAT suite

Change-Id: Iaa2ac1eb156bc9bcff41ec242318f6a973210d38
Signed-off-by: selias <samelias@cisco.com>

2 files changed, 250 insertions, 0 deletions

diff --git a/resources/libraries/python/NAT.py b/resources/libraries/python/NAT.py
new file mode 100644
index 0000000000..d0e01c7f84
--- /dev/null
+++ b/resources/libraries/python/NAT.py
@@ -0,0 +1,107 @@
+# Copyright (c) 2016 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.
+
+"""NAT utilities library."""
+
+from resources.libraries.python.VatExecutor import VatExecutor
+
+
+class NATUtil(object):
+    """NAT utilities."""
+
+    def __init__(self):
+        pass
+
+    @staticmethod
+    def vpp_get_nat_static_mappings(node):
+        """Get NAT static mappings from VPP node.
+
+        :param node: VPP node.
+        :type node: dict
+        :returns: List of static mappings.
+        :rtype: list
+        :raises RuntimeError: If the output is not as expected.
+        """
+
+        vat = VatExecutor()
+        # JSON output not supported for this command
+        vat.execute_script('snat/snat_mapping_dump.vat', node, json_out=False)
+
+        stdout = vat.get_script_stdout()
+        lines = stdout.split("\n")
+
+        data = []
+        # lines[0,1] are table and column headers
+        for line in lines[2::]:
+            items = line.split(" ")
+            while "" in items:
+                items.remove("")
+            if len(items) == 0:
+                continue
+            elif len(items) == 3:
+                # no ports were returned
+                data.append({
+                    "local_address": items[0],
+                    "remote_address": items[1],
+                    "vrf": items[2]
+                })
+            elif len(items) == 5:
+                data.append({
+                    "local_address": items[0],
+                    "local_port": items[1],
+                    "remote_address": items[2],
+                    "remote_port": items[3],
+                    "vrf": items[4]
+                })
+            else:
+                raise RuntimeError("Unexpected output from span_mapping_dump.")
+
+        return data
+
+    @staticmethod
+    def vpp_get_nat_interfaces(node):
+        """Get list of interfaces configured with NAT from VPP node.
+
+        :param node: VPP node.
+        :type node: dict
+        :returns: List of interfaces on the node that are configured with NAT.
+        :rtype: list
+        :raises RuntimeError: If the output is not as expected.
+        """
+
+        vat = VatExecutor()
+        # JSON output not supported for this command
+        vat.execute_script('snat/snat_interface_dump.vat', node,
+                           json_out=False)
+
+        stdout = vat.get_script_stdout()
+        lines = stdout.split("\n")
+
+        data = []
+        for line in lines:
+            items = line.split(" ")
+            while "" in items:
+                items.remove("")
+            if len(items) == 0:
+                continue
+            elif len(items) == 3:
+                data.append({
+                    # items[0] is the table header - "sw_if_index"
+                    "sw_if_index": items[1],
+                    "direction": items[2]
+                })
+            else:
+                raise RuntimeError(
+                    "Unexpected output from span_interface_dump.")
+
+        return data
diff --git a/resources/libraries/python/honeycomb/NAT.py b/resources/libraries/python/honeycomb/NAT.py
new file mode 100644
index 0000000000..1fb066d10c
--- /dev/null
+++ b/resources/libraries/python/honeycomb/NAT.py
@@ -0,0 +1,143 @@
+# Copyright (c) 2016 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.
+
+"""Keywords to manipulate NAT configuration using Honeycomb REST API."""
+
+from resources.libraries.python.topology import Topology
+from resources.libraries.python.HTTPRequest import HTTPCodes
+from resources.libraries.python.honeycomb.HoneycombSetup import HoneycombError
+from resources.libraries.python.honeycomb.HoneycombUtil \
+    import DataRepresentation
+from resources.libraries.python.honeycomb.HoneycombUtil \
+    import HoneycombUtil as HcUtil
+
+
+class NATKeywords(object):
+    """Keywords for NAT configuration."""
+
+    def __init__(self):
+        pass
+
+    @staticmethod
+    def _set_nat_properties(node, path, data=None):
+        """Set NAT properties and check the return code.
+
+        :param node: Honeycomb node.
+        :param path: Path which is added to the base path to identify the data.
+        :param data: The new data to be set. If None, the item will be removed.
+        :type node: dict
+        :type path: str
+        :type data: dict
+        :returns: Content of response.
+        :rtype: bytearray
+        :raises HoneycombError: If the status code in response to PUT is not
+        OK or ACCEPTED.
+        """
+
+        if data:
+            status_code, resp = HcUtil. \
+                put_honeycomb_data(node, "config_nat", data, path,
+                                   data_representation=DataRepresentation.JSON)
+        else:
+            status_code, resp = HcUtil. \
+                delete_honeycomb_data(node, "config_nat", path)
+
+        if status_code not in (HTTPCodes.OK, HTTPCodes.ACCEPTED):
+            raise HoneycombError(
+                "The configuration of NAT was not successful. "
+                "Status code: {0}.".format(status_code))
+        return resp
+
+    @staticmethod
+    def get_nat_oper_data(node):
+        """Read NAT operational data.
+
+        :param node: Honeycomb node.
+        :type node: dict
+        :returns: Content of response.
+        :rtype: bytearray
+        :raises HoneycombError: If the operation fails or the response
+        is not as expected.
+        """
+
+        status_code, resp = HcUtil.get_honeycomb_data(node, "oper_nat")
+
+        if status_code != HTTPCodes.OK:
+            raise HoneycombError("Could not retrieve NAT operational data.")
+
+        if "nat-state" not in resp.keys():
+            raise HoneycombError(
+                "Unexpected format, response does not contain nat-state.")
+        return resp['nat-state']
+
+    @staticmethod
+    def configure_nat_entries(node, data, instance=0, entry=1):
+        """Configure NAT entries on node.
+
+        :param node: Honeycomb node.
+        :param data: Data to be configured on node.
+        :param instance: NAT instance ID.
+        :param entry: NAT entry index.
+        :type node: dict
+        :type data: dict
+        :type instance: int
+        :type entry: int
+        :returns: Content of response.
+        :rtype: bytearray
+        """
+
+        return NATKeywords._set_nat_properties(
+            node,
+            '/nat-instances/nat-instance/{0}/'
+            'mapping-table/mapping-entry/{1}/'.format(instance, entry),
+            data)
+
+    @staticmethod
+    def configure_nat_on_interface(node, interface, direction, delete=False):
+        """Configure NAT on the specified interface.
+
+        :param node: Honeycomb node.
+        :param interface: Name of an interface on the node.
+        :param direction: NAT direction, outbound or inbound.
+        :param delete: Delete an existing interface NAT configuration.
+        :type node: dict
+        :type interface: str
+        :type direction: str
+        :type delete: bool
+        :returns: Content of response.
+        :rtype: bytearray
+        :raises HoneycombError: If the operation fails.
+        """
+
+        interface = Topology.convert_interface_reference(
+            node, interface, "name")
+
+        interface = interface.replace("/", "%2F")
+        path = "/interface/{0}/interface-nat:nat/{1}".format(
+            interface, direction)
+
+        data = {direction: {}}
+
+        if delete:
+            status_code, resp = HcUtil.delete_honeycomb_data(
+                node, "config_vpp_interfaces", path)
+        else:
+            status_code, resp = HcUtil.put_honeycomb_data(
+                node, "config_vpp_interfaces", data, path)
+
+        if status_code not in (HTTPCodes.OK, HTTPCodes.ACCEPTED):
+            raise HoneycombError(
+                "Could not configure NAT on interface. "
+                "Status code: {0}.".format(status_code))
+
+        return resp