Add in-message cli_request/cli_reply API

This new CLI API is meant to replace the
cli_request/cli_reply that uses shared memory.

PS: checkstyle -- *hate*

Change-Id: I6318f8f6b9be2c2398b49dac9e2193c1998ea724
Signed-off-by: Ole Troan <ot@cisco.com>

vpp-api/python/tests/test_cli.py

@@ -0,0 +1,52 @@
+#!/usr/bin/env python
+
+from __future__ import print_function
+import unittest, sys, time, threading, struct
+import test_base
+import vpp_papi
+from ipaddress import *
+
+import glob, subprocess
+class TestPAPI(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        #
+        # Start main VPP process
+        cls.vpp_bin = glob.glob(test_base.scriptdir+'/../../../build-root/install-vpp*-native/vpp/bin/vpp')[0]
+        print("VPP BIN:", cls.vpp_bin)
+        cls.vpp = subprocess.Popen([cls.vpp_bin, "unix", "nodaemon"], stderr=subprocess.PIPE)
+        print('Started VPP')
+        # For some reason unless we let VPP start up the API cannot connect.
+        time.sleep(0.3)
+    @classmethod
+    def tearDownClass(cls):
+        cls.vpp.terminate()
+
+    def setUp(self):
+        print("Connecting API")
+        r = vpp_papi.connect("test_papi")
+        self.assertEqual(r, 0)
+
+    def tearDown(self):
+        r = vpp_papi.disconnect()
+        self.assertEqual(r, 0)
+
+    #
+    # The tests themselves
+    #
+
+    #
+    # Basic request / reply
+    #
+    def test_cli_request(self):
+        print(vpp_papi.cli_exec('show version verbose'))
+        #t = vpp_papi.cli_inband_request(len(cmd), cmd)
+        #print('T:',t)
+        #reply = t.reply[0].decode().rstrip('\x00')
+        #print(reply)
+        #program = t.program.decode().rstrip('\x00')
+        #self.assertEqual('vpe', program)
+
+
+if __name__ == '__main__':
+    unittest.main()