Reorganizing the server code

This change creates a new subpackage under services, server, which now
holds all of the software server related code. References to different
pieces of the server code base are updated accordingly.

kmip/services/server/kmip_protocol.py

@@ -0,0 +1,65 @@
+# Copyright (c) 2014 The Johns Hopkins University/Applied Physics Laboratory
+# All Rights Reserved.
+#
+# 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 struct import unpack
+
+import binascii
+import logging
+
+from kmip.core.utils import BytearrayStream
+
+
+class KMIPProtocol(object):
+    HEADER_SIZE = 8
+
+    def __init__(self, socket, buffer_size=1024):
+        self.socket = socket
+        self.logger = logging.getLogger(__name__)
+
+    def write(self, data):
+        if len(data) > 0:
+            sbuffer = bytes(data)
+            self.logger.debug('KMIPProtocol.write: {0}'.format(
+                binascii.hexlify(sbuffer)))
+            self.socket.sendall(sbuffer)
+
+    def read(self):
+        header = self._recv_all(self.HEADER_SIZE)
+        msg_size = unpack('!I', header[4:])[0]
+        payload = self._recv_all(msg_size)
+        data = BytearrayStream(header + payload)
+        self.logger.debug('KMIPProtocol.read: {0}'.format(
+            binascii.hexlify(bytes(data.buffer))))
+        return data
+
+    def _recv_all(self, total_bytes_to_be_read):
+        bytes_read = 0
+        total_msg = b''
+        while bytes_read < total_bytes_to_be_read:
+            msg = self.socket.recv(total_bytes_to_be_read - bytes_read)
+            if not msg:
+                break
+            bytes_read += len(msg)
+            total_msg += msg
+        if bytes_read != total_bytes_to_be_read:
+            raise Exception("Expected {0} bytes, Received {1} bytes"
+                            .format(total_bytes_to_be_read, bytes_read))
+        return total_msg
+
+
+class KMIPProtocolFactory(object):
+
+    def getProtocol(self, socket):
+        return KMIPProtocol(socket)