NFP - Base mode Service Orchestrator

Device won't get created in base mode support.
Inserted proxy_agent component in this patch as other
patches are dependent on this.

Change-Id: Ia13caec590584ea8958abdffff09a6fef9dcb226
Implements: blueprint gbp-network-services-framework
Co-Authored-By: Yogesh Rajmane<yogesh.rajmane@oneconvergence.com>
Co-Authored-By: Akash Deep<akash.deep@oneconvergence.com>
Co-Authored-By: Ahmed Khan<ahmed.khan@oneconvergence.com>
(cherry picked from commit ea5e8a2621)

gbpservice/neutron/tests/unit/nfp/lib/test_transport.py

@@ -0,0 +1,179 @@
+#    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.
+
+from gbpservice.nfp.lib import transport
+import mock
+from neutron.common import rpc as n_rpc
+from neutron import context as ctx
+from oslo_config import cfg
+from oslo_serialization import jsonutils
+import unittest
+
+"""
+Common class used to create configuration mapping
+"""
+
+
+class Map(dict):
+
+    def __init__(self, *args, **kwargs):
+        super(Map, self).__init__(*args, **kwargs)
+        for arg in args:
+            if isinstance(arg, dict):
+                for k, v in arg.iteritems():
+                    self[k] = v
+
+        if kwargs:
+            for k, v in kwargs.iteritems():
+                self[k] = v
+
+    def __getattr__(self, attr):
+        return self.get(attr)
+
+    def __setattr__(self, key, value):
+        self.__setitem__(key, value)
+
+    def __setitem__(self, key, value):
+        super(Map, self).__setitem__(key, value)
+        self.__dict__.update({key: value})
+
+    def __delattr__(self, item):
+        self.__delitem__(item)
+
+    def __delitem__(self, key):
+        super(Map, self).__delitem__(key)
+        del self.__dict__[key]
+
+
+class TestContext(object):
+
+    def get_context(self):
+        try:
+            return ctx.Context('some_user', 'some_tenant')
+        except Exception:
+            return ctx.Context('some_user', 'some_tenant')
+
+    def get_test_context(self):
+        # creating a test context
+        variables = {}
+        variables['context'] = self.get_context()
+        variables['body'] = {'info': {'context': {}},
+                             'config': []}
+        variables['method_type'] = 'CREATE'
+        variables['device_config'] = True
+        return variables
+
+
+class CommonLibraryTest(unittest.TestCase):
+
+    def setUp(self):
+        n_rpc.init(cfg.CONF)
+        self.imprt_rc = 'gbpservice.nfp.lib.rest_client_over_unix'
+
+    def _cast(self, context, method, **kwargs):
+        return
+
+    def _call(self, context, method, **kwargs):
+        return []
+
+    def _get(self, path):
+
+        class MockResponse(object):
+
+            def __init__(self):
+                self.content = {'success': '200'}
+        return MockResponse()
+
+    def _uget(self, path):
+        return(200, "")
+
+    def _post(self, path, body, method_type):
+        return (200, "")
+
+    def _upost(self, path, body, delete=False):
+        return (200, "")
+
+    def test_rpc_send_request_to_configurator(self):
+
+        with mock.patch('oslo_messaging.rpc.client._CallContext.cast') as cast:
+            cast.side_effect = self._cast
+
+            test_context = TestContext().get_test_context()
+            conf = Map(backend='rpc', RPC=Map(topic='topic'))
+
+            transport.send_request_to_configurator(
+                conf,
+                test_context['context'],
+                test_context['body'],
+                test_context['method_type'],
+                test_context['device_config'])
+
+    def test_tcp_rest_send_request_to_configurator(self):
+
+        with mock.patch.object(transport.RestApi, 'post') as mock_post:
+            mock_post.side_effect = self._post
+
+            test_context = TestContext().get_test_context()
+            conf = Map(backend='tcp_rest', RPC=Map(topic='topic'),
+                       REST=Map(rest_server_ip='0.0.0.0',
+                                rest_server_port=5672))
+
+            transport.send_request_to_configurator(
+                conf,
+                test_context['context'],
+                test_context['body'],
+                test_context['method_type'],
+                test_context['device_config'])
+
+    def test_unix_rest_send_request_to_configurator(self):
+
+        with mock.patch(self.imprt_rc + '.post') as mock_post:
+            mock_post.side_effect = self._upost
+
+            test_context = TestContext().get_test_context()
+            conf = Map(backend='unix_rest')
+
+            transport.send_request_to_configurator(
+                conf,
+                test_context['context'],
+                test_context['body'],
+                test_context['method_type'],
+                test_context['device_config'])
+
+    def test_tcp_rest_get_response_from_configurator(self):
+
+        with mock.patch.object(transport.RestApi, 'get') as (
+            mock_get), mock.patch.object(jsonutils, 'loads') as (
+            mock_loads):
+            mock_get.side_effect = self._get
+            mock_loads.return_value = True
+
+            conf = Map(backend='tcp_rest', RPC=Map(topic='topic'),
+                       REST=Map(rest_server_ip='0.0.0.0',
+                                rest_server_port=5672))
+
+            transport.get_response_from_configurator(conf)
+
+    def test_unix_rest_get_response_from_configurator(self):
+
+        with mock.patch(self.imprt_rc + '.get') as (
+            mock_get), mock.patch.object(jsonutils, 'loads') as (
+            mock_loads):
+            mock_get.side_effect = self._uget
+            mock_loads.return_value = True
+
+            conf = Map(backend='unix_rest')
+
+            transport.get_response_from_configurator(conf)
+
+if __name__ == '__main__':
+    unittest.main()

gbpservice/neutron/tests/unit/nfp/proxy_agent/modules/test_proxy_agent.py

@@ -0,0 +1,83 @@
+#    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.
+
+from gbpservice.nfp.proxy_agent.modules import proxy_agent
+import mock
+from neutron import context as ctx
+import unittest
+
+rpc_manager = proxy_agent.RpcHandler
+
+
+class TestContext(object):
+
+    def get_context(self):
+        try:
+            return ctx.Context('some_user', 'some_tenant')
+        except Exception:
+            return ctx.Context('some_user', 'some_tenant')
+
+"Common class for proxy agent test cases"
+
+
+class ConfigAgentProxyTestCase(unittest.TestCase):
+
+    def setUp(self):
+        self.manager = rpc_manager('conf', 'sc')
+        self.context = TestContext().get_context()
+        self.import_lib = 'gbpservice.nfp.lib.transport'
+
+    def _post(self, conf, context, body,
+              method_type, device_config=False,
+              network_function_event=False):
+        return (200, '')
+
+    def test_create_network_function_config(self):
+        _data = "data"
+        import_send = self.import_lib + '.send_request_to_configurator'
+        with mock.patch(import_send) as mock_send:
+            mock_send.side_effect = self._post
+            self.manager.create_network_function_config(self.context, _data)
+
+    def test_delete_network_function_config(self):
+        _data = "data"
+        import_send = self.import_lib + '.send_request_to_configurator'
+        with mock.patch(import_send) as mock_send:
+            mock_send.side_effect = self._post
+            self.manager.delete_network_function_config(self.context, _data)
+
+    def test_create_network_function_device_config(self):
+        _data = "data"
+        import_send = self.import_lib + '.send_request_to_configurator'
+        with mock.patch(import_send) as mock_send:
+            mock_send.side_effect = self._post
+            self.manager.create_network_function_device_config(
+                self.context, _data)
+
+    def test_delete_network_function_device_config(self):
+        _data = "data"
+        import_send = self.import_lib + '.send_request_to_configurator'
+        with mock.patch(import_send) as mock_send:
+            mock_send.side_effect = self._post
+            self.manager.delete_network_function_device_config(
+                self.context, _data)
+
+    def test_network_function_event(self):
+        _data = "data"
+        import_send = self.import_lib + '.send_request_to_configurator'
+        with mock.patch(import_send) as mock_send:
+            mock_send.side_effect = self._post
+            self.manager.network_function_event(
+                self.context, _data)
+
+if __name__ == "__main__":
+    unittest.main()

gbpservice/neutron/tests/unit/nfp/proxy_agent/notifications/test_pull_notifications.py

@@ -0,0 +1,95 @@
+#    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.
+
+from gbpservice.nfp.proxy_agent.notifications import pull
+import mock
+from neutron import context as ctx
+import unittest
+
+from neutron.common import rpc as n_rpc
+from oslo_config import cfg
+
+pull_notification = pull.PullNotification
+
+
+class TestContext(object):
+
+    def get_context_dict(self):
+        try:
+            context = ctx.Context('some_user', 'some_tenant')
+        except Exception:
+            context = ctx.Context('some_user', 'some_tenant')
+        return context.to_dict()
+
+"""Common class for pull notification tests"""
+
+
+class PullNotificationTestCase(unittest.TestCase):
+
+    def setUp(self):
+        n_rpc.init(cfg.CONF)
+        self.p_notification = pull_notification('sc', 'conf')
+        self.context = TestContext().get_context_dict()
+        self.ev = ''
+        self.import_lib = 'gbpservice.nfp.lib.transport'
+        self.import_cast = 'oslo_messaging.rpc.client._CallContext.cast'
+
+    def _resp_base_structure(self, requester):
+        response_data = [{
+            'info': {
+                'context': {
+                    'neutron_context': self.context,
+                    'requester': requester}
+            }}]
+        return response_data
+
+    def _cast(self, context, method, **kwargs):
+        return
+
+    def _resp_data_nso(self, conf):
+        response_data = self._resp_base_structure('service_orch')
+        return response_data
+
+    def _resp_data_ndo(self, conf):
+        response_data = self._resp_base_structure('device_orch')
+        return response_data
+
+    def _resp_data_nco(self, conf):
+        response_data = self._resp_base_structure('nas_service')
+        return response_data
+
+    def test_nco_pull_notifications(self):
+        import_get = self.import_lib + '.get_response_from_configurator'
+        with mock.patch(import_get) as (
+            mock_get), mock.patch(self.import_cast) as (
+            mock_cast):
+            mock_get.side_effect = self._resp_data_nco
+            mock_cast.side_effect = self._cast
+            self.p_notification.pull_notifications(self.ev)
+
+    def test_nso_pull_notifications(self):
+        import_get = self.import_lib + '.get_response_from_configurator'
+        with mock.patch(import_get) as (
+            mock_get), mock.patch(self.import_cast) as (
+            mock_cast):
+            mock_get.side_effect = self._resp_data_nso
+            mock_cast.side_effect = self._cast
+            self.p_notification.pull_notifications(self.ev)
+
+    def test_ndo_pull_notifications(self):
+        import_get = self.import_lib + '.get_response_from_configurator'
+        with mock.patch(import_get) as (
+            mock_get), mock.patch(self.import_cast) as (
+            mock_cast):
+            mock_get.side_effect = self._resp_data_ndo
+            mock_cast.side_effect = self._cast
+            self.p_notification.pull_notifications(self.ev)

gbpservice/nfp/common/constants.py

@@ -12,6 +12,7 @@
 
 GBP_MODE = "gbp"
 NEUTRON_MODE = "neutron"
+NOVA_MODE = "nova"
 
 NEUTRON_PORT = "neutron_port"
 GBP_PORT = "gbp_policy_target"
@@ -36,7 +37,24 @@ PENDING_UPDATE = "PENDING_UPDATE"
 PENDING_DELETE = "PENDING_DELETE"
 ERROR = "ERROR"
 
+DEVICE_ORCHESTRATOR = "device_orch"
+SERVICE_ORCHESTRATOR = "service_orch"
+
+HEAT_CONFIG_TAG = 'heat_config'
+CONFIG_INIT_TAG = 'config_init'
+ANSIBLE_TAG = 'ansible'
+CUSTOM_JSON = 'custom_json'
+
 COMPLETED = "COMPLETED"
 IN_PROGRESS = "IN_PROGRESS"
 
 CONFIG_INIT_TAG = "config_init"
+CONFIG_SCRIPT = 'config_script'
+
+CONFIG_TAG_RESOURCE_MAP = {
+    HEAT_CONFIG_TAG: 'heat',
+    CONFIG_INIT_TAG: 'config_init',
+    ANSIBLE_TAG: 'ansible',
+    CUSTOM_JSON: 'custom_json'}
+
+LOADBALANCER_RPC_API_VERSION = "2.0"

gbpservice/nfp/lib/rest_client_over_unix.py

@@ -0,0 +1,170 @@
+#    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 exceptions
+import httplib
+import httplib2
+import zlib
+
+import six.moves.urllib.parse as urlparse
+import socket
+
+from oslo_serialization import jsonutils
+
+from gbpservice.nfp.core import log as nfp_logging
+
+LOG = nfp_logging.getLogger(__name__)
+
+
+class RestClientException(exceptions.Exception):
+
+    """ RestClient Exception """
+
+
+class UnixHTTPConnection(httplib.HTTPConnection):
+
+    """Connection class for HTTP over UNIX domain socket."""
+
+    def __init__(self, host, port=None, strict=None, timeout=None,
+                 proxy_info=None):
+        httplib.HTTPConnection.__init__(self, host, port, strict)
+        self.timeout = timeout
+        self.socket_path = '/var/run/uds_socket'
+
+    def connect(self):
+        """Method used to connect socket server."""
+        self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+        if self.timeout:
+            self.sock.settimeout(self.timeout)
+        try:
+            self.sock.connect(self.socket_path)
+        except socket.error as exc:
+            raise RestClientException(
+                "Caught exception socket.error : %s" % exc)
+
+
+class UnixRestClient(object):
+
+    def _http_request(self, url, method_type, headers=None, body=None):
+        try:
+            h = httplib2.Http()
+            resp, content = h.request(
+                url,
+                method=method_type,
+                headers=headers,
+                body=body,
+                connection_type=UnixHTTPConnection)
+            return resp, content
+
+        except httplib2.ServerNotFoundError:
+            raise RestClientException("Server Not Found")
+
+        except exceptions.Exception as e:
+            raise RestClientException("httplib response error %s" % (e))
+
+    def send_request(self, path, method_type, request_method='http',
+                     server_addr='127.0.0.1',
+                     headers=None, body=None):
+        """Implementation for common interface for all unix crud requests.
+        Return:Http Response
+        """
+        # prepares path, body, url for sending unix request.
+        if method_type.upper() != 'GET':
+            body = jsonutils.dumps(body)
+            body = zlib.compress(body)
+
+        path = '/v1/nfp/' + path
+        url = urlparse.urlunsplit((
+            request_method,
+            server_addr,
+            path,
+            None,
+            ''))
+
+        try:
+            resp, content = self._http_request(url, method_type,
+                                               headers=headers, body=body)
+            if content != '':
+                content = zlib.decompress(content)
+            message = "%s:%s" % (resp, content)
+            LOG.info(message)
+        except RestClientException as rce:
+            message = "ERROR : %s" % (rce)
+            LOG.error(message)
+            raise rce
+
+        success_code = [200, 201, 202, 204]
+        # Evaluate responses into success and failures.
+        # Raise exception for failure cases which needs
+        # to be handled by caller.
+        if success_code.__contains__(resp.status):
+            return resp, content
+        elif resp.status == 400:
+            raise RestClientException("HTTPBadRequest: %s" % resp.reason)
+        elif resp.status == 401:
+            raise RestClientException("HTTPUnauthorized: %s" % resp.reason)
+        elif resp.status == 403:
+            raise RestClientException("HTTPForbidden: %s" % resp.reason)
+        elif resp.status == 404:
+            raise RestClientException("HttpNotFound: %s" % resp.reason)
+        elif resp.status == 405:
+            raise RestClientException(
+                "HTTPMethodNotAllowed: %s" % resp.reason)
+        elif resp.status == 406:
+            raise RestClientException("HTTPNotAcceptable: %s" % resp.reason)
+        elif resp.status == 408:
+            raise RestClientException("HTTPRequestTimeout: %s" % resp.reason)
+        elif resp.status == 409:
+            raise RestClientException("HTTPConflict: %s" % resp.reason)
+        elif resp.status == 415:
+            raise RestClientException(
+                "HTTPUnsupportedMediaType: %s" % resp.reason)
+        elif resp.status == 417:
+            raise RestClientException(
+                "HTTPExpectationFailed: %s" % resp.reason)
+        elif resp.status == 500:
+            raise RestClientException("HTTPServerError: %s" % resp.reason)
+        else:
+            raise Exception('Unhandled Exception code: %s %s' % (resp.status,
+                                                                 resp.reason))
+
+
+def get(path):
+    """Implements get method for unix restclient
+    Return:Http Response
+    """
+    return UnixRestClient().send_request(path, 'GET')
+
+
+def put(path, body):
+    """Implements put method for unix restclient
+    Return:Http Response
+    """
+    headers = {'content-type': 'application/octet-stream'}
+    return UnixRestClient().send_request(
+        path, 'PUT', headers=headers, body=body)
+
+
+def post(path, body, delete=False):
+    """Implements post method for unix restclient
+    Return:Http Response
+    """
+    # Method-Type added here,as DELETE/CREATE
+    # both case are handled by post as delete also needs
+    # to send data to the rest-unix-server.
+    headers = {'content-type': 'application/octet-stream'}
+    if delete:
+        headers.update({'method-type': 'DELETE'})
+    else:
+        headers.update({'method-type': 'CREATE'})
+    return UnixRestClient().send_request(
+        path, 'POST', headers=headers, body=body)

gbpservice/nfp/lib/transport.py

@@ -9,7 +9,308 @@
 #    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 exceptions
+
+from gbpservice.nfp.common import constants as nfp_constants
+from gbpservice.nfp.core import log as nfp_logging
+from gbpservice.nfp.lib import rest_client_over_unix as unix_rc
+
+from neutron.common import rpc as n_rpc
+from neutron import context as n_context
+
+from oslo_config import cfg
+from oslo_config import cfg as oslo_config
+import oslo_messaging as messaging
+from oslo_serialization import jsonutils
+
+import requests
+
+LOG = nfp_logging.getLogger(__name__)
+Version = 'v1'  # v1/v2/v3#
+
+rest_opts = [
+    cfg.StrOpt('rest_server_address',
+               default='', help='Rest connection IpAddr'),
+    cfg.IntOpt('rest_server_port',
+               default=8080, help='Rest connection Port'),
+]
+
+rpc_opts = [
+    cfg.StrOpt('topic',
+               default='', help='Topic for rpc connection'),
+]
+
+OPTS = [
+    cfg.StrOpt(
+        'backend',
+        default='rpc',
+        help='Backend Support for communicationg with configurator.'
+    ),
+]
+
+oslo_config.CONF.register_opts(OPTS)
+oslo_config.CONF.register_opts(rest_opts, "REST")
+oslo_config.CONF.register_opts(rpc_opts, "RPC")
+n_rpc.init(cfg.CONF)
+
+UNIX_REST = 'unix_rest'
+TCP_REST = 'tcp_rest'
+
+""" Common Class for restClient exceptions """
+
+
+class RestClientException(exceptions.Exception):
+
+    """ RestClient Exception """
+
+""" Common Class to handle restclient request"""
+
+
+class RestApi(object):
+
+    def __init__(self, rest_server_address, rest_server_port):
+        self.rest_server_address = rest_server_address
+        self.rest_server_port = rest_server_port
+        self.url = "http://%s:%s/v1/nfp/%s"
+
+    def _response(self, resp, url):
+        success_code = [200, 201, 202, 204]
+        # Evaluate responses into success and failures.
+        # Raise exception for failure cases which needs
+        # to be handled in caller function.
+        if success_code.__contains__(resp.status_code):
+            return resp
+        elif resp.status_code == 400:
+            raise RestClientException("HTTPBadRequest: %s" % resp.reason)
+        elif resp.status_code == 401:
+            raise RestClientException("HTTPUnauthorized: %s" % resp.reason)
+        elif resp.status_code == 403:
+            raise RestClientException("HTTPForbidden: %s" % resp.reason)
+        elif resp.status_code == 404:
+            raise RestClientException("HttpNotFound: %s" % resp.reason)
+        elif resp.status_code == 405:
+            raise RestClientException(
+                "HTTPMethodNotAllowed: %s" % resp.reason)
+        elif resp.status_code == 406:
+            raise RestClientException("HTTPNotAcceptable: %s" % resp.reason)
+        elif resp.status_code == 408:
+            raise RestClientException("HTTPRequestTimeout: %s" % resp.reason)
+        elif resp.status_code == 409:
+            raise RestClientException("HTTPConflict: %s" % resp.reason)
+        elif resp.status_code == 415:
+            raise RestClientException(
+                "HTTPUnsupportedMediaType: %s" % resp.reason)
+        elif resp.status_code == 417:
+            raise RestClientException(
+                "HTTPExpectationFailed: %s" % resp.reason)
+        elif resp.status_code == 500:
+            raise RestClientException("HTTPServerError: %s" % resp.reason)
+        else:
+            raise RestClientException('Unhandled Exception code: %s %s' %
+                                      (resp.status_code, resp.reason))
+        return resp
+
+    def post(self, path, body, method_type):
+        """Post restclient request handler
+        Return:Http response
+        """
+        url = self.url % (
+            self.rest_server_address,
+            self.rest_server_port, path)
+        data = jsonutils.dumps(body)
+        try:
+            # Method-Type needs to be added here,as DELETE/CREATE
+            # both case are handled by post as delete also needs
+            # to send data to the rest-server.
+            headers = {"content-type": "application/json",
+                       "method-type": method_type}
+            resp = requests.post(url, data,
+                                 headers=headers)
+            message = "POST url %s %d" % (url, resp.status_code)
+            LOG.info(message)
+            return self._response(resp, url)
+        except RestClientException as rce:
+            message = "Rest API %s - Failed. Reason: %s" % (
+                url, rce)
+            LOG.error(message)
+
+    def get(self, path):
+        """Get restclient request handler
+        Return:Http response
+        """
+        url = self.url % (
+            self.rest_server_address,
+            self.rest_server_port, path)
+        try:
+            headers = {"content-type": "application/json"}
+            resp = requests.get(url,
+                                headers=headers)
+            message = "GET url %s %d" % (url, resp.status_code)
+            LOG.info(message)
+            return self._response(resp, url)
+        except RestClientException as rce:
+            message = "Rest API %s - Failed. Reason: %s" % (
+                url, rce)
+            LOG.error(message)
+
+""" Common Class to handle rpcclient request"""
+
+
+class RPCClient(object):
+    API_VERSION = '1.0'
+
+    def __init__(self, topic):
+        self.topic = topic
+        target = messaging.Target(topic=self.topic,
+                                  version=self.API_VERSION)
+        self.client = n_rpc.get_client(target)
+        self.cctxt = self.client.prepare(version=self.API_VERSION,
+                                         topic=self.topic)
+
+
+def send_request_to_configurator(conf, context, body,
+                                 method_type, device_config=False,
+                                 network_function_event=False):
+    """Common function to handle (create, delete) request for configurator.
+    Send create/delete to configurator rest-server.
+    Return:Http Response
+    """
+    # This function reads configuration data and decides
+    # method (tcp_rest/rpc) for sending request to configurator.
+    if device_config:
+        method_name = method_type.lower() + '_network_function_device_config'
+        body['info']['context'].update({'neutron_context': context.to_dict()})
+    elif network_function_event:
+        method_name = 'network_function_event'
+    else:
+        if (body['config'][0]['resource'] in
+                nfp_constants.CONFIG_TAG_RESOURCE_MAP.values()):
+            body['config'][0]['resource_data'].update(
+                {'neutron_context': context.to_dict()})
+            body['info']['context'].update(
+                {'neutron_context': context.to_dict()})
+        method_name = method_type.lower() + '_network_function_config'
+
+    if conf.backend == TCP_REST:
+        try:
+            rc = RestApi(conf.REST.rest_server_address,
+                         conf.REST.rest_server_port)
+            resp = rc.post(method_name, body, method_type.upper())
+            message = "%s -> POST response: (%s) body: %s " % (
+                method_name, resp, body)
+            LOG.info(message)
+        except RestClientException as rce:
+            message = "%s -> POST request failed.Reason: %s" % (
+                method_name, rce)
+            LOG.error(message)
+
+    elif conf.backend == UNIX_REST:
+        try:
+            resp, content = unix_rc.post(method_name,
+                                         body=body)
+            message = "%s -> POST response: (%s) body : %s " % (
+                method_name, content, body)
+            LOG.info(message)
+
+        except unix_rc.RestClientException as rce:
+            message = "%s -> request failed . Reason %s " % (
+                method_name, rce)
+            LOG.error(message)
+
+    else:
+        message = ("%s -> RPC request sent ! with body : %s " % (
+            (method_name, body)))
+        LOG.info(message)
+        rpcClient = RPCClient(conf.RPC.topic)
+        rpcClient.cctxt.cast(context, method_name,
+                             body=body)
+
+
+def get_response_from_configurator(conf):
+    """Common function to handle get request for configurator.
+    Get notification http response from configurator rest server.
+    Return:Http Response
+    response_data = [
+            {'receiver': <neutron/device_orchestrator/service_orchestrator>,
+             'resource': <firewall/vpn/loadbalancer/orchestrator>,
+             'method': <notification method name>,
+             'kwargs': <notification method arguments>
+        },
+    ]
+    """
+    # This function reads configuration data and decides
+    # method (tcp_rest/ unix_rest/ rpc) for get response from configurator.
+    if conf.backend == TCP_REST:
+        try:
+            rc = RestApi(conf.REST.rest_server_address,
+                         conf.REST.rest_server_port)
+            resp = rc.get('get_notifications')
+            rpc_cbs_data = jsonutils.loads(resp.content)
+            return rpc_cbs_data
+        except RestClientException as rce:
+            message = ("get_notification ->"
+                       "GET request failed. Reason : %s" % (rce))
+            LOG.error(message)
+            return "get_notification -> GET request failed. Reason : %s" % (
+                rce)
+        except Exception as e:
+            message = ("get_notification ->"
+                       "GET request failed. Reason : %s" % (e))
+            LOG.error(message)
+            return "get_notification -> GET request failed. Reason : %s" % (
+                e)
+
+    elif conf.backend == UNIX_REST:
+        try:
+            resp, content = unix_rc.get('get_notifications')
+            content = jsonutils.loads(content)
+            if content:
+                message = ("get_notification ->"
+                           "GET response: (%s)" % (content))
+                LOG.info(message)
+            return content
+        except unix_rc.RestClientException as rce:
+            message = ("get_notification ->"
+                       "GET request failed. Reason : %s" % (
+                           rce))
+            LOG.error(message)
+            return "get_notification -> GET request failed. Reason : %s" % (
+                rce)
+        except Exception as e:
+            message = ("get_notification ->"
+                       "GET request failed. Reason : %s" % (
+                           e))
+            LOG.error(message)
+            return "get_notification -> GET request failed. Reason : %s" % (
+                e)
+
+    else:
+        rpc_cbs_data = []
+        try:
+            rpcClient = RPCClient(conf.RPC.topic)
+            context = n_context.Context(
+                'config_agent_user', 'config_agent_tenant')
+            rpc_cbs_data = rpcClient.cctxt.call(context,
+                                                'get_notifications')
+            return rpc_cbs_data
+        except Exception as e:
+            message = "Exception while processing %s" % e
+            LOG.error(message)
+            return "get_notification -> GET request failed. Reason : %s" % (
+                e)
 
 
 def parse_service_flavor_string(service_flavor_str):
-    pass
+    """Parse service_flavour string to service details dictionary.
+        Return: Service Details Dictionary
+    """
+    service_details = {}
+    if ',' not in service_flavor_str:
+        service_details['device_type'] = 'nova'
+        service_details['service_vendor'] = service_flavor_str
+    else:
+        service_flavor_dict = dict(item.split('=') for item
+                                   in service_flavor_str.split(','))
+        service_details = {key.strip(): value.strip() for key, value
+                           in service_flavor_dict.iteritems()}
+    return service_details

gbpservice/nfp/orchestrator/modules/service_orchestrator.py

@@ -63,6 +63,7 @@ def events_init(controller, config, service_orchestrator):
               'DEVICE_CREATED', 'DEVICE_ACTIVE', 'DEVICE_DELETED',
               'DEVICE_CREATE_FAILED', 'SEND_HEAT_CONFIG',
               'CHECK_HEAT_CONFIG_RESULT', 'APPLY_USER_CONFIG',
+              'APPLY_USER_CONFIG_BASEMODE',
               'DELETE_USER_CONFIG', 'UPDATE_USER_CONFIG',
               'POLICY_TARGET_ADD', 'POLICY_TARGET_REMOVE',
               'CONSUMER_ADD', 'CONSUMER_REMOVE',
@@ -415,6 +416,7 @@ class ServiceOrchestrator(nfp_api.NfpEventHandler):
             "DEVICE_DELETED": self.handle_device_deleted,
             "DEVICE_CREATE_FAILED": self.handle_device_create_failed,
             "APPLY_USER_CONFIG": self.apply_user_config,
+            "APPLY_USER_CONFIG_BASEMODE": self.apply_user_config_basemode,
             "CHECK_HEAT_CONFIG_RESULT": self.check_heat_config_result,
             "DELETE_USER_CONFIG": self.delete_user_config,
             "UPDATE_USER_CONFIG": self.handle_update_user_config,
@@ -753,13 +755,6 @@ class ServiceOrchestrator(nfp_api.NfpEventHandler):
                 network_function_status)
             return None
 
-        if base_mode_support:
-            # In base mode support, create user config directly, no need to
-            # create network function instance, network function device first.
-            self.create_network_function_user_config(network_function['id'],
-                                                     service_config_str)
-            return network_function
-
         nfp_context = network_function_info
 
         service_details['service_type'] = service_profile['service_type']
@@ -767,7 +762,16 @@ class ServiceOrchestrator(nfp_api.NfpEventHandler):
         nfp_context['network_function'] = network_function
         nfp_context['service_details'] = service_details
         nfp_context['share_existing_device'] = False
+        nfp_context['base_mode'] = base_mode_support
 
+        if base_mode_support:
+            # Store the context in current thread
+            nfp_core_context.store_nfp_context(nfp_context)
+            # In base mode support, create user config directly, no need to
+            # create network function instance, network function device first.
+            self.create_network_function_user_config(network_function['id'],
+                                                     service_config_str)
+        else:
             # Create and event to perform Network service instance
             self._create_event('CREATE_NETWORK_FUNCTION_INSTANCE',
                                event_data=nfp_context,
@@ -955,15 +959,47 @@ class ServiceOrchestrator(nfp_api.NfpEventHandler):
     def check_heat_config_result(self, event):
         nfp_context = event.data['nfp_context']
 
+        base_mode = nfp_context['base_mode']
+        if base_mode:
+            # Create and event to apply user config
+            self._create_event('APPLY_USER_CONFIG_BASEMODE',
+                               event_data=event.data,
+                               is_internal_event=True)
+        else:
             event_desc = nfp_context['event_desc']
             key = nfp_context['key']
             id = nfp_context['id']
 
             # Complete the original event here
-        event = self._controller.new_event(
+            event = self._controller.new_event(id=id, key=key,
-            id=id, key=key, desc_dict=event_desc)
+                                               desc_dict=event_desc)
             self._controller.event_complete(event, result='SUCCESS')
 
+    def apply_user_config_basemode(self, event):
+        request_data = event.data
+        network_function_details = self.get_network_function_details(
+            request_data['network_function_id'])
+        request_data['heat_stack_id'] = self.config_driver.apply_config(
+            network_function_details)  # Heat driver to launch stack
+        network_function = network_function_details['network_function']
+        request_data['network_function_id'] = network_function['id']
+        if not request_data['heat_stack_id']:
+            self._create_event('USER_CONFIG_FAILED',
+                               event_data=request_data, is_internal_event=True)
+            return
+        request_data['tenant_id'] = network_function['tenant_id']
+        request_data['network_function_details'] = network_function_details
+        LOG.debug("handle_device_active heat_stack_id: %s"
+                  % (request_data['heat_stack_id']))
+        self.db_handler.update_network_function(
+            self.db_session, network_function['id'],
+            {'heat_stack_id': request_data['heat_stack_id'],
+             'description': network_function['description']})
+        self._create_event('APPLY_USER_CONFIG_IN_PROGRESS',
+                           event_data=request_data,
+                           is_poll_event=True,
+                           original_event=event)
+
     def apply_user_config(self, event):
         nfp_context = event.data
         nfp_core_context.store_nfp_context(nfp_context)
@@ -1739,12 +1775,14 @@ class ServiceOrchestrator(nfp_api.NfpEventHandler):
 
         nfp_context = nfp_core_context.get_nfp_context()
         if nfp_context:
-            network_function = nfp_context['network_function']
+            network_function = nfp_context.get('network_function', None)
-            network_function_instance = nfp_context[
+            network_function_instance = nfp_context.get(
-                'network_function_instance']
+                'network_function_instance', None)
-            network_function_device = nfp_context['network_function_device']
+            network_function_device = nfp_context.get(
-            service_type = nfp_context['service_details']['service_type']
+                'network_function_device', None)
-
+            service_details = nfp_context.get('service_details', None)
+            if service_details:
+                service_type = service_details.get('service_type', None)
         if not network_function:
             network_function = self.db_handler.get_network_function(
                 self.db_session, network_function_id)
@@ -1827,11 +1865,13 @@ class NSOConfiguratorRpcApi(object):
         network_function_instance = network_function_details.get(
             'network_function_instance')
         nfp_context = nfp_core_context.get_nfp_context()
-        nfp_context_rpc = None
+        rpc_nfp_context = None
         if nfp_context:
-            nfp_context_rpc = {'event_desc': nfp_context['event_desc'],
+            rpc_nfp_context = {
-                               'key': nfp_context.pop('key'),
+                'event_desc': nfp_context.get('event_desc', None),
-                               'id': nfp_context.pop('id')}
+                'key': nfp_context.pop('key', None),
+                'id': nfp_context.pop('id', None),
+                'base_mode': nfp_context.pop('base_mode', None)}
         request_info = {
             'nf_id': network_function_details['network_function']['id'],
             'nfi_id': (network_function_instance['id']
@@ -1840,7 +1880,7 @@ class NSOConfiguratorRpcApi(object):
             'requester': nfp_constants.SERVICE_ORCHESTRATOR,
             'operation': operation,
             'logging_context': nfp_logging.get_logging_context(),
-            'nfp_context': nfp_context_rpc
+            'nfp_context': rpc_nfp_context
         }
         if operation in ['consumer_add', 'consumer_remove']:
             request_info.update({'consumer_ptg': user_config_data[

gbpservice/nfp/proxy_agent/lib/topics.py

@@ -0,0 +1,16 @@
+#    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.
+
+PROXY_AGENT_TOPIC = 'nfp-proxy-agent-topic'
+SERVICE_ORCH_TOPIC = 'nfp-nso-notification-topic'
+DEVICE_ORCH_TOPIC = 'nfp-ndo-notification-topic'
+CONFIG_ORCH_TOPIC = 'nfp-nco-notification-topic'

gbpservice/nfp/proxy_agent/modules/notification_agent.py

@@ -0,0 +1,34 @@
+#    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.
+
+from gbpservice.nfp.core.event import Event
+from gbpservice.nfp.proxy_agent.notifications import pull
+
+
+def events_init(sc, conf):
+    """Register event with its handler."""
+    evs = [
+        Event(id='PULL_NOTIFICATIONS',
+              handler=pull.PullNotification(sc, conf))]
+    sc.register_events(evs)
+
+
+def nfp_module_init(sc, conf):
+    """Initialize module to register rpc & event handler"""
+    events_init(sc, conf)
+
+
+def nfp_module_post_init(sc, conf):
+    """Post a event for pull notification after each periodic_task_interval"""
+    ev = sc.new_event(id='PULL_NOTIFICATIONS',
+                      key='PULL_NOTIFICATIONS')
+    sc.post_event(ev)

gbpservice/nfp/proxy_agent/modules/proxy_agent.py

@@ -0,0 +1,105 @@
+#    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.
+
+from gbpservice.nfp.core import log as nfp_logging
+from gbpservice.nfp.core.rpc import RpcAgent
+from gbpservice.nfp.lib import transport as transport
+from gbpservice.nfp.proxy_agent.lib import topics
+
+
+from oslo_log import helpers as log_helpers
+import oslo_messaging as messaging
+
+LOG = nfp_logging.getLogger(__name__)
+
+
+def rpc_init(config, sc):
+    """Register agent with its handler."""
+    rpcmgr = RpcHandler(config, sc)
+    agent = RpcAgent(
+        sc,
+        host=config.host,
+        topic=topics.PROXY_AGENT_TOPIC,
+        manager=rpcmgr)
+    sc.register_rpc_agents([agent])
+
+
+def nfp_module_init(sc, conf):
+    """Initialize module to register rpc & event handler"""
+    rpc_init(conf, sc)
+
+
+class RpcHandler(object):
+    RPC_API_VERSION = '1.0'
+    target = messaging.Target(version=RPC_API_VERSION)
+
+    def __init__(self, conf, sc):
+        super(RpcHandler, self).__init__()
+        self._conf = conf
+        self._sc = sc
+
+    @log_helpers.log_method_call
+    def create_network_function_config(self, context, body):
+        """Method of rpc handler for create_network_function_config.
+        Return: Http Response.
+        """
+        transport.send_request_to_configurator(self._conf,
+                                               context, body,
+                                               "CREATE")
+
+    @log_helpers.log_method_call
+    def delete_network_function_config(self, context, body):
+        """Method of rpc handler for delete_network_function_config.
+        Return: Http Response.
+        """
+        transport.send_request_to_configurator(self._conf,
+                                               context, body,
+                                               "DELETE")
+
+    @log_helpers.log_method_call
+    def update_network_function_config(self, context, body):
+        """Method of rpc handler for delete_network_function_config.
+        Return: Http Response.
+        """
+        transport.send_request_to_configurator(self._conf,
+                                               context, body,
+                                               "UPDATE")
+
+    @log_helpers.log_method_call
+    def create_network_function_device_config(self, context, body):
+        """Method of rpc handler for create_network_function_device_config.
+        Return: Http Response.
+        """
+        transport.send_request_to_configurator(self._conf,
+                                               context, body,
+                                               "CREATE",
+                                               device_config=True)
+
+    @log_helpers.log_method_call
+    def delete_network_function_device_config(self, context, body):
+        """Method of rpc handler for delete_network_function_device_config.
+        Return: Http Response.
+        """
+        transport.send_request_to_configurator(self._conf,
+                                               context, body,
+                                               "DELETE",
+                                               device_config=True)
+
+    @log_helpers.log_method_call
+    def network_function_event(self, context, body):
+        """Method of rpc handler for create_service.
+        Return: Http Response.
+        """
+        transport.send_request_to_configurator(self._conf,
+                                               context, body,
+                                               "CREATE",
+                                               network_function_event=True)

gbpservice/nfp/proxy_agent/notifications/pull.py

@@ -0,0 +1,89 @@
+#    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.
+
+from gbpservice.nfp.core import log as nfp_logging
+from gbpservice.nfp.core import module as nfp_api
+from gbpservice.nfp.lib import transport as transport
+from gbpservice.nfp.proxy_agent.lib import topics as a_topics
+
+from neutron import context as n_context
+
+import sys
+import traceback
+
+LOG = nfp_logging.getLogger(__name__)
+
+ResourceMap = {
+    'device_orch': a_topics.DEVICE_ORCH_TOPIC,
+    'service_orch': a_topics.SERVICE_ORCH_TOPIC,
+    'nas_service': a_topics.CONFIG_ORCH_TOPIC
+}
+
+
+"""Periodic Class to pull notification from configurator"""
+
+
+class PullNotification(nfp_api.NfpEventHandler):
+
+    def __init__(self, sc, conf):
+        self._sc = sc
+        self._conf = conf
+
+    def handle_event(self, ev):
+        self._sc.poll_event(ev)
+
+    def _method_handler(self, notification):
+        # Method handles notification as per resource, resource_type and method
+        try:
+            requester = notification['info']['context']['requester']
+            topic = ResourceMap[requester]
+            context = notification['info']['context']['neutron_context']
+            rpcClient = transport.RPCClient(topic)
+            rpc_ctx = n_context.Context.from_dict(context)
+            rpcClient.cctxt.cast(rpc_ctx,
+                                 'network_function_notification',
+                                 notification_data=notification)
+        except Exception as e:
+            raise Exception(e)
+
+    @nfp_api.poll_event_desc(event='PULL_NOTIFICATIONS', spacing=2)
+    def pull_notifications(self, ev):
+        """Pull and handle notification from configurator."""
+        notifications = transport.get_response_from_configurator(self._conf)
+
+        if not isinstance(notifications, list):
+            message = "Notfications not list, %s" % (notifications)
+            LOG.error(message)
+
+        else:
+            for notification in notifications:
+                if not notification:
+                    message = "Receiver Response: Empty"
+                    LOG.info(message)
+                    continue
+                try:
+                    self._method_handler(notification)
+                except AttributeError:
+                    exc_type, exc_value, exc_traceback = sys.exc_info()
+                    message = ("AttributeError while handling"
+                        "message %s : %s " % (notification,
+                        traceback.format_exception(
+                            exc_type, exc_value, exc_traceback)))
+                    LOG.error(message)
+
+                except Exception as e:
+                    exc_type, exc_value, exc_traceback = sys.exc_info()
+                    message = ("Generic exception (%s)"
+                        "while handling message (%s) : %s" % (
+                            e, notification, traceback.format_exception(
+                                exc_type, exc_value, exc_traceback)))
+                    LOG.error(message)

gbpservice/nfp/proxy_agent/proxy/proxy.py

@@ -0,0 +1,333 @@
+#    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 eventlet
+eventlet.monkey_patch()
+
+import argparse
+import ConfigParser
+from gbpservice.nfp.core import log as nfp_logging
+import os
+from oslo_config import cfg
+from oslo_log import log as oslo_logging
+import socket
+import sys
+import time
+
+
+oslo_logging.register_options(cfg.CONF)
+
+LOG = nfp_logging.getLogger(__name__)
+
+# Queue of proxy connections which workers will handle
+ConnQ = eventlet.queue.Queue(maxsize=0)
+
+tcp_open_connection_count = 0
+tcp_close_connection_count = 0
+
+
+class ConnectionIdleTimeOut(Exception):
+
+    '''
+    Exception raised when connection is idle for configured timeout
+    '''
+    pass
+
+
+"""
+parsing the proxy configuration file
+"""
+
+
+class Configuration(object):
+
+    def __init__(self, filee):
+        config = ConfigParser.ConfigParser()
+        config.read(filee)
+
+        self.thread_pool_size = config.getint('OPTIONS', 'thread_pool_size')
+        self.unix_bind_path = config.get('OPTIONS', 'unix_bind_path')
+        self.max_connections = config.getint('OPTIONS', 'max_connections')
+        self.worker_threads = config.getint('OPTIONS', 'worker_threads')
+        self.connect_max_wait_timeout = config.getfloat(
+            'OPTIONS', 'connect_max_wait_timeout')
+        self.idle_max_wait_timeout = config.getfloat(
+            'OPTIONS', 'idle_max_wait_timeout')
+        self.idle_min_wait_timeout = config.getfloat(
+            'OPTIONS', 'idle_min_wait_timeout')
+        self.rest_server_address = config.get(
+            'NFP_CONTROLLER', 'rest_server_address')
+        self.rest_server_port = config.getint(
+            'NFP_CONTROLLER', 'rest_server_port')
+
+
+"""
+Class to create Unix Listener
+"""
+
+
+class UnixServer(object):
+
+    def __init__(self, conf, proxy):
+        self.proxy = proxy
+        self.bind_path = conf.unix_bind_path
+        self.max_connections = conf.max_connections
+        # Make sure the socket does not already exist
+        try:
+            os.unlink(self.bind_path)
+        except OSError:
+            if os.path.exists(self.bind_path):
+                raise
+
+        # Create a UDS socket
+        self.socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+
+        # Bind the socket to the port
+        message = 'starting up on %s' % self.bind_path
+        LOG.info(message)
+        self.socket.bind(self.bind_path)
+        self.socket.listen(self.max_connections)
+
+    def listen(self):
+        client, address = self.socket.accept()
+        self.proxy.new_client(client, address)
+
+
+"""
+Class to create TCP client Connection if
+TCP server is alive
+"""
+
+
+class TcpClient(object):
+
+    def __init__(self, conf, proxy):
+        self.conf = conf
+        self.proxy = proxy
+        self.server_address = conf.rest_server_address
+        self.server_port = conf.rest_server_port
+        # Connect the socket to the port where the server is listening
+        self.server = (self.server_address, self.server_port)
+
+    def connect(self):
+        sock = socket.socket()
+        message = 'connecting to %s port %s' % self.server
+        LOG.info(message)
+        sock.settimeout(self.conf.connect_max_wait_timeout)
+        try:
+            sock.connect(self.server)
+        except socket.error as exc:
+            message = "Caught exception socket.error : %s" % exc
+            LOG.error(message)
+            return sock, False
+        return sock, True
+
+
+"""
+ADT for proxy connection
+"""
+
+
+class Connection(object):
+
+    def __init__(self, conf, socket, type='unix'):
+        self._socket = socket
+        self._idle_wait = conf.idle_min_wait_timeout
+        self._idle_timeout = conf.idle_max_wait_timeout
+        self._idle_count_max = (self._idle_timeout / self._idle_wait)
+        self._idle_count = 0
+        self._start_time = time.time()
+        self._end_time = time.time()
+        self.type = type
+        self.socket_id = self._socket.fileno()
+
+    def _tick(self):
+        self._idle_count += 1
+
+    def _timedout(self):
+        if self._idle_count > self._idle_count_max:
+            self._end_time = time.time()
+            raise ConnectionIdleTimeOut(
+                "Connection (%d) - stime (%s) - etime (%s) - "
+                "idle_count (%d) idle_count_max(%d)" % (
+                    self.identify(), self._start_time,
+                    self._end_time, self._idle_count, self._idle_count_max))
+
+    def idle(self):
+        self._tick()
+        self._timedout()
+
+    def idle_reset(self):
+        self._idle_count = 0
+        self._start_time = time.time()
+
+    def _wait(self, timeout):
+        if self.type == 'unix':
+            eventlet.sleep(timeout)
+            self._socket.setblocking(0)
+        else:
+            self._socket.settimeout(timeout)
+
+    def recv(self):
+        self._wait(self._idle_wait)
+        try:
+            data = self._socket.recv(1024)
+            if data and len(data):
+                self.idle_reset()
+                return data
+            self.idle()
+        except socket.timeout:
+            self.idle()
+        except socket.error:
+            self.idle()
+        return None
+
+    def send(self, data):
+        self._socket.setblocking(1)
+        self._socket.sendall(data)
+        self._socket.setblocking(0)
+
+    def close(self):
+        message = "Closing Socket - %d" % (self.identify())
+        LOG.debug(message)
+        try:
+            self._socket.shutdown(socket.SHUT_RDWR)
+            self._socket.close()
+        except Exception as exc:
+            message = "%s - exception while closing - %s" % (
+                self.identify(), str(exc))
+            LOG.error(message)
+
+    def identify(self):
+        return self.socket_id
+
+
+"""
+ADT for Proxy Connection Object
+Each Connection Object is pair of Unix Socket and
+TCP Client Socket
+"""
+
+
+class ProxyConnection(object):
+
+    def __init__(self, conf, unix_socket, tcp_socket):
+        self._unix_conn = Connection(conf, unix_socket, type='unix')
+        self._tcp_conn = Connection(conf, tcp_socket, type='tcp')
+        message = "New Proxy - Unix - %d, TCP - %d" % (
+            self._unix_conn.identify(), self._tcp_conn.identify())
+        LOG.debug(message)
+
+    def close(self):
+        self._unix_conn.close()
+        self._tcp_conn.close()
+
+    def _proxy(self, rxconn, txconn):
+        data = rxconn.recv()
+        if data:
+            txconn.send(data)
+
+    def run(self):
+        try:
+            self._proxy(self._unix_conn, self._tcp_conn)
+            self._proxy(self._tcp_conn, self._unix_conn)
+            return True
+        except Exception as exc:
+            message = "%s" % (exc)
+            LOG.debug(message)
+            self._unix_conn.close()
+            self._tcp_conn.close()
+            return False
+
+    def identify(self):
+        return '%d:%d' % (
+            self._unix_conn.identify(),
+            self._tcp_conn.identify())
+
+
+"""
+ADT for proxy Worker
+"""
+
+
+class Worker(object):
+
+    def run(self):
+        """
+        Worker thread will pop the Proxy Connection Object
+        from Connection Queue and Perform send and receive
+        operations. If the connection is ideal upto ideal_max_timeout
+        it will not push the Object into connection queue so Proxy Connection
+        Object is automatically destroy, otherwise it will again
+        push the Object in connection Queue
+        """
+        while True:
+            try:
+                pc = ConnQ.get()
+                call = True
+                while call:
+                    call = pc.run()
+            except eventlet.queue.Empty:
+                pass
+            eventlet.sleep(0)
+
+
+"""
+ADT to  Run the configurator proxy,
+        accept the Unix Client request,
+        Check REST Server is reachable or not,
+        Try to establish TCP Client Connection to REST
+
+"""
+
+
+class Proxy(object):
+
+    def __init__(self, conf):
+        self.conf = conf
+        # Be a server and wait for connections from the client
+        self.server = UnixServer(conf, self)
+        self.client = TcpClient(conf, self)
+
+    def start(self):
+        """Run each worker in new thread"""
+
+        for i in range(self.conf.worker_threads):
+            eventlet.spawn_n(Worker().run)
+        while True:
+            self.server.listen()
+
+    def new_client(self, unixsocket, address):
+        """Establish connection with the tcp server"""
+
+        tcpsocket, connected = self.client.connect()
+        if not connected:
+            message = "Proxy -> Could not connect with tcp server"
+            LOG.error(message)
+            unixsocket.close()
+            tcpsocket.close()
+        else:
+            pc = ProxyConnection(self.conf, unixsocket, tcpsocket)
+            ConnQ.put(pc)
+
+
+def main(argv):
+    cfg.CONF(args=sys.argv[1:])
+    oslo_logging.setup(cfg.CONF, 'nfp')
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        '-config-file', "--config-file", action="store", dest='config_file')
+    parser.add_argument(
+        '-log-file', "--log-file", action="store", dest='log_file')
+    args = parser.parse_args(sys.argv[1:])
+    conf = Configuration(args.config_file)
+    Proxy(conf).start()