CSIT-651 Add keywords and template for memif

Add keywords and template for memif

Change-Id: I8bd5cfe345260750a74930c8ef55690be5f2dd5e
Signed-off-by: Peter Mikus <pmikus@cisco.com>

2 files changed, 82 insertions, 0 deletions

diff --git a/resources/libraries/python/Memif.py b/resources/libraries/python/Memif.py
new file mode 100644
index 0000000000..09fa2a8c3e
--- /dev/null
+++ b/resources/libraries/python/Memif.py
@@ -0,0 +1,80 @@
+# Copyright (c) 2017 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.
+
+"""Memif interface library."""
+
+from resources.libraries.python.ssh import SSH
+from resources.libraries.python.VatExecutor import VatExecutor, VatTerminal
+
+
+class Memif(object):
+    """Memif interface class."""
+
+    def __init__(self):
+        pass
+
+    @staticmethod
+    def create_memif_interface(node, socket, mid, role="master"):
+        """Create Memif interface on the given node.
+
+        :param node: Given node to create Memif interface on.
+        :param socket: Memif interface socket path.
+        :param mid: Memif interface ID.
+        :param role: Memif interface role [master|slave]. Default is master.
+        :type node: dict
+        :type socket: str
+        :type mid: str
+        :type role: str
+        :returns: SW interface index.
+        :rtype: int
+        :raises ValueError: If command 'create memif' fails.
+        """
+
+        with VatTerminal(node, json_param=False) as vat:
+            vat.vat_terminal_exec_cmd_from_template(
+                'memif_create.vat',
+                socket=socket, id=mid, role=role)
+            if 'sw_if_index' in vat.vat_stdout:
+                try:
+                    return int(vat.vat_stdout.split()[4])
+                except KeyError:
+                    raise ValueError('Create Memif interface failed on node '
+                                     '{}"'.format(node['host']))
+            else:
+                raise ValueError('Create Memif interface failed on node '
+                                 '{}"'.format(node['host']))
+
+    @staticmethod
+    def show_memif(node):
+        """Show Memif data for the given node.
+
+        :param node: Given node to show Memif data on.
+        :type node: dict
+        """
+        vat = VatExecutor()
+        vat.execute_script("memif_dump.vat", node, json_out=False)
+
+    @staticmethod
+    def clear_memif_socks(node, *socks):
+        """Clear Memif sockets for the given node.
+
+        :param node: Given node to clear Memif sockets on.
+        :param socks: Memif sockets.
+        :type node: dict
+        :type socks: list
+        """
+        ssh = SSH()
+        ssh.connect(node)
+
+        for sock in socks:
+            ssh.exec_command_sudo('rm -f {}'.format(sock))
diff --git a/resources/libraries/python/VatExecutor.py b/resources/libraries/python/VatExecutor.py
index bfb7fce4e4..a3f12bf46f 100644
--- a/resources/libraries/python/VatExecutor.py
+++ b/resources/libraries/python/VatExecutor.py
@@ -245,6 +245,7 @@ class VatTerminal(object):
             'sudo -S {}{}'.format(Constants.VAT_BIN_NAME, json_text),
             self.__VAT_PROMPT)
         self._exec_failure = False
+        self.vat_stdout = None
 
     def __enter__(self):
         return self
@@ -265,6 +266,7 @@ class VatTerminal(object):
         try:
             out = self._ssh.interactive_terminal_exec_command(self._tty, cmd,
                                                               self.__VAT_PROMPT)
+            self.vat_stdout = out
         except:
             self._exec_failure = True
             raise