Add C++ API

Change-Id: Iff634f22d43470e2dc028387b3816257fd7b4156
Signed-off-by: Klement Sekera <ksekera@cisco.com>

4 files changed, 669 insertions, 13 deletions

diff --git a/test/ext/Makefile b/test/ext/Makefile
index 4a45fef6782..a188427a62f 100644
--- a/test/ext/Makefile
+++ b/test/ext/Makefile
@@ -1,17 +1,31 @@
 BINDIR = $(BR)/vapi_test/
-BIN = $(addprefix $(BINDIR), vapi_test)
+CBIN = $(addprefix $(BINDIR), vapi_c_test)
+CPPBIN = $(addprefix $(BINDIR), vapi_cpp_test)
+
 LIBS = -L$(VPP_TEST_BUILD_DIR)/vpp/.libs/ -L$(VPP_TEST_BUILD_DIR)/vpp/vpp-api/vapi/.libs/ -lvppinfra -lvlibmemoryclient -lsvm -lpthread -lcheck -lsubunit -lrt -lm -lvapiclient
-CFLAGS = -ggdb -O0 -Wall -pthread -I$(WS_ROOT)/src -I$(VPP_TEST_BUILD_DIR)/vpp/vpp-api/vapi -I$(WS_ROOT)/src/vpp-api/vapi/
+CFLAGS = -std=gnu99 -g -Wall -pthread -I$(WS_ROOT)/src -I$(VPP_TEST_INSTALL_PATH)/vpp/include -I$(BINDIR)
+CPPFLAGS = -std=c++11 -g -Wall -pthread -I$(WS_ROOT)/src -I$(VPP_TEST_INSTALL_PATH)/vpp/include -I$(BINDIR)
 
-all: $(BIN)
+all: $(CBIN) $(CPPBIN)
 
 $(BINDIR):
 	mkdir -p $(BINDIR)
 
-SRC = vapi_test.c
+CSRC = vapi_c_test.c
+
+fake.api.vapi.h: fake.api.json $(BINDIR) $(WS_ROOT)/src/vpp-api/vapi/vapi_c_gen.py
+	$(WS_ROOT)/src/vpp-api/vapi/vapi_c_gen.py --prefix $(BINDIR) $<
+
+fake.api.vapi.hpp: fake.api.json $(BINDIR) $(WS_ROOT)/src/vpp-api/vapi/vapi_cpp_gen.py
+	$(WS_ROOT)/src/vpp-api/vapi/vapi_cpp_gen.py --prefix $(BINDIR) $<
+
+$(CBIN): $(CSRC) $(BINDIR) $(VPP_TEST_BUILD_DIR)/vpp/vpp-api/vapi/.libs/libvapiclient.so $(VPP_TEST_BUILD_DIR)/vpp/.libs/libvppinfra.so $(VPP_TEST_BUILD_DIR)/vpp/.libs/libvlibmemoryclient.so $(VPP_TEST_BUILD_DIR)/vpp/.libs/libsvm.so fake.api.vapi.h
+	$(CC) -o $@ $(CFLAGS) $(CSRC) $(LIBS)
+
+CPPSRC = vapi_cpp_test.cpp
 
-$(BIN): $(SRC) $(BINDIR) $(VPP_TEST_BUILD_DIR)/vpp/vpp-api/vapi/.libs/libvapiclient.so $(VPP_TEST_BUILD_DIR)/vpp/.libs/libvppinfra.so $(VPP_TEST_BUILD_DIR)/vpp/.libs/libvlibmemoryclient.so $(VPP_TEST_BUILD_DIR)/vpp/.libs/libsvm.so
-	gcc -ggdb -o $@ $(SRC) $(CFLAGS) $(LIBS)
+$(CPPBIN): $(CPPSRC) $(BINDIR) $(VPP_TEST_BUILD_DIR)/vpp/vpp-api/vapi/.libs/libvapiclient.so $(VPP_TEST_BUILD_DIR)/vpp/.libs/libvppinfra.so $(VPP_TEST_BUILD_DIR)/vpp/.libs/libvlibmemoryclient.so $(VPP_TEST_BUILD_DIR)/vpp/.libs/libsvm.so fake.api.vapi.hpp
+	$(CXX) -o $@ $(CPPFLAGS) $(CPPSRC) $(LIBS)
 
 clean:
 	rm -rf $(BINDIR)
diff --git a/test/ext/fake.api.json b/test/ext/fake.api.json
new file mode 100644
index 00000000000..3e8d6a95a13
--- /dev/null
+++ b/test/ext/fake.api.json
@@ -0,0 +1,35 @@
+{
+    "types" : [
+
+    ],
+    "messages" : [
+        ["test_fake_msg",
+            ["u16", "_vl_msg_id"],
+            ["u32", "client_index"],
+            ["u32", "context"],
+            ["u8", "dummy", 256],
+            {"crc" : "0xcafebafe"}
+        ],
+        ["test_fake_msg_reply",
+            ["u16", "_vl_msg_id"],
+            ["u32", "context"],
+            ["i32", "retval"],
+            {"crc" : "0xcafebafe"}
+        ],
+	["test_fake_dump",
+            ["u16", "_vl_msg_id"],
+            ["u32", "client_index"],
+            ["u32", "context"],
+            ["u32", "dummy"],
+            {"crc" : "0xcafebafe"}
+	],
+        ["test_fake_details",
+            ["u16", "_vl_msg_id"],
+            ["u32", "client_index"],
+            ["u32", "context"],
+            ["u32", "dummy"],
+            {"crc" : "0xcafebafe"}
+        ]
+    ],
+"vl_api_version" :"0x224c7aad"
+}
diff --git a/test/ext/vapi_test.c b/test/ext/vapi_c_test.c
index eca6be7d6cc..622b617b394 100644
--- a/test/ext/vapi_test.c
+++ b/test/ext/vapi_c_test.c
@@ -22,16 +22,18 @@
 #include <assert.h>
 #include <setjmp.h>
 #include <check.h>
-#include <vpp-api/vapi/vapi.h>
-#include <vpe.api.vapi.h>
-#include <interface.api.vapi.h>
-#include <l2.api.vapi.h>
-#include <stats.api.vapi.h>
+#include <vapi/vapi.h>
+#include <vapi/vpe.api.vapi.h>
+#include <vapi/interface.api.vapi.h>
+#include <vapi/l2.api.vapi.h>
+#include <vapi/stats.api.vapi.h>
+#include <fake.api.vapi.h>
 
 DEFINE_VAPI_MSG_IDS_VPE_API_JSON;
 DEFINE_VAPI_MSG_IDS_INTERFACE_API_JSON;
 DEFINE_VAPI_MSG_IDS_L2_API_JSON;
 DEFINE_VAPI_MSG_IDS_STATS_API_JSON;
+DEFINE_VAPI_MSG_IDS_FAKE_API_JSON;
 
 static char *app_name = NULL;
 static char *api_prefix = NULL;
@@ -521,9 +523,8 @@ START_TEST (test_show_version_1)
   size_t size;
   rv = vapi_recv (ctx, (void *) &resp, &size);
   ck_assert_int_eq (VAPI_OK, rv);
-  vapi_payload_show_version_reply *payload = &resp->payload;
   int dummy;
-  show_version_cb (NULL, &dummy, VAPI_OK, true, payload);
+  show_version_cb (NULL, &dummy, VAPI_OK, true, &resp->payload);
   vapi_msg_free (ctx, resp);
 }
 
@@ -1069,6 +1070,16 @@ START_TEST (test_no_response_2)
 }
 
 END_TEST;
+
+START_TEST (test_unsupported)
+{
+  printf ("--- Unsupported messages ---\n");
+  bool available = vapi_is_msg_available (ctx, vapi_msg_id_test_fake_msg);
+  ck_assert_int_eq (false, available);
+}
+
+END_TEST;
+
 Suite *
 test_suite (void)
 {
@@ -1115,6 +1126,11 @@ test_suite (void)
   tcase_add_test (tc_nonblock, test_no_response_2);
   suite_add_tcase (s, tc_nonblock);
 
+  TCase *tc_unsupported = tcase_create ("Unsupported message");
+  tcase_add_checked_fixture (tc_unsupported, setup_blocking, teardown);
+  tcase_add_test (tc_unsupported, test_unsupported);
+  suite_add_tcase (s, tc_unsupported);
+
   return s;
 }
 
diff --git a/test/ext/vapi_cpp_test.cpp b/test/ext/vapi_cpp_test.cpp
new file mode 100644
index 00000000000..14c35d5bedd
--- /dev/null
+++ b/test/ext/vapi_cpp_test.cpp
@@ -0,0 +1,591 @@
+/*
+ *------------------------------------------------------------------
+ * 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.
+ *------------------------------------------------------------------
+ */
+
+#include <memory>
+#include <stdio.h>
+#include <unistd.h>
+#include <assert.h>
+#include <setjmp.h>
+#include <check.h>
+#include <vapi/vapi.hpp>
+#include <vapi/vpe.api.vapi.hpp>
+#include <vapi/interface.api.vapi.hpp>
+#include <vapi/stats.api.vapi.hpp>
+#include <fake.api.vapi.hpp>
+
+DEFINE_VAPI_MSG_IDS_VPE_API_JSON;
+DEFINE_VAPI_MSG_IDS_INTERFACE_API_JSON;
+DEFINE_VAPI_MSG_IDS_STATS_API_JSON;
+DEFINE_VAPI_MSG_IDS_FAKE_API_JSON;
+
+static char *app_name = nullptr;
+static char *api_prefix = nullptr;
+static const int max_outstanding_requests = 32;
+static const int response_queue_size = 32;
+
+using namespace vapi;
+
+void verify_show_version_reply (const Show_version_reply &r)
+{
+  auto &p = r.get_payload ();
+  printf ("show_version_reply: program: `%s', version: `%s', build directory: "
+          "`%s', build date: `%s'\n",
+          p.program, p.version, p.build_directory, p.build_date);
+  ck_assert_str_eq ("vpe", (char *)p.program);
+}
+
+Connection con;
+
+void setup (void)
+{
+  vapi_error_e rv = con.connect (
+      app_name, api_prefix, max_outstanding_requests, response_queue_size);
+  ck_assert_int_eq (VAPI_OK, rv);
+}
+
+void teardown (void)
+{
+  con.disconnect ();
+}
+
+START_TEST (test_show_version_1)
+{
+  printf ("--- Show version by reading response associated to request ---\n");
+  Show_version sv (con);
+  vapi_error_e rv = sv.execute ();
+  ck_assert_int_eq (VAPI_OK, rv);
+  rv = con.wait_for_response (sv);
+  ck_assert_int_eq (VAPI_OK, rv);
+  auto &r = sv.get_response ();
+  verify_show_version_reply (r);
+}
+
+END_TEST;
+
+struct Show_version_cb
+{
+  Show_version_cb () : called{0} {};
+  int called;
+  vapi_error_e operator() (Show_version &sv)
+  {
+    auto &r = sv.get_response ();
+    verify_show_version_reply (r);
+    ++called;
+    return VAPI_OK;
+  }
+};
+
+START_TEST (test_show_version_2)
+{
+  printf ("--- Show version by getting a callback ---\n");
+  Show_version_cb cb;
+  Show_version sv (con, std::ref (cb));
+  vapi_error_e rv = sv.execute ();
+  ck_assert_int_eq (VAPI_OK, rv);
+  con.dispatch (sv);
+  ck_assert_int_eq (1, cb.called);
+}
+
+END_TEST;
+
+START_TEST (test_loopbacks_1)
+{
+  printf ("--- Create/delete loopbacks by waiting for response ---\n");
+  const auto num_ifs = 5;
+  u8 mac_addresses[num_ifs][6];
+  memset (&mac_addresses, 0, sizeof (mac_addresses));
+  u32 sw_if_indexes[num_ifs];
+  memset (&sw_if_indexes, 0xff, sizeof (sw_if_indexes));
+  for (int i = 0; i < num_ifs; ++i)
+    {
+      memcpy (&mac_addresses[i], "\1\2\3\4\5\6", 6);
+      mac_addresses[i][5] = i;
+    }
+  for (int i = 0; i < num_ifs; ++i)
+    {
+      Create_loopback cl (con);
+      auto &p = cl.get_request ().get_payload ();
+      memcpy (p.mac_address, mac_addresses[i], sizeof (p.mac_address));
+      auto e = cl.execute ();
+      ck_assert_int_eq (VAPI_OK, e);
+      vapi_error_e rv = con.wait_for_response (cl);
+      ck_assert_int_eq (VAPI_OK, rv);
+      auto &rp = cl.get_response ().get_payload ();
+      ck_assert_int_eq (0, rp.retval);
+      sw_if_indexes[i] = rp.sw_if_index;
+    }
+  for (int i = 0; i < num_ifs; ++i)
+    {
+      printf ("Created loopback with MAC %02x:%02x:%02x:%02x:%02x:%02x --> "
+              "sw_if_index %u\n",
+              mac_addresses[i][0], mac_addresses[i][1], mac_addresses[i][2],
+              mac_addresses[i][3], mac_addresses[i][4], mac_addresses[i][5],
+              sw_if_indexes[i]);
+    }
+
+  { // new context
+    bool seen[num_ifs] = {0};
+    Sw_interface_dump d (con);
+    auto &p = d.get_request ().get_payload ();
+    p.name_filter_valid = 0;
+    memset (p.name_filter, 0, sizeof (p.name_filter));
+    auto rv = d.execute ();
+    ck_assert_int_eq (VAPI_OK, rv);
+    rv = con.wait_for_response (d);
+    ck_assert_int_eq (VAPI_OK, rv);
+    auto &rs = d.get_result_set ();
+    for (auto &r : rs)
+      {
+        auto &p = r.get_payload ();
+        for (int i = 0; i < num_ifs; ++i)
+          {
+            if (sw_if_indexes[i] == p.sw_if_index)
+              {
+                ck_assert_int_eq (0, seen[i]);
+                seen[i] = true;
+              }
+          }
+      }
+    for (int i = 0; i < num_ifs; ++i)
+      {
+        ck_assert_int_eq (1, seen[i]);
+      }
+  }
+
+  for (int i = 0; i < num_ifs; ++i)
+    {
+      Delete_loopback dl (con);
+      dl.get_request ().get_payload ().sw_if_index = sw_if_indexes[i];
+      auto rv = dl.execute ();
+      ck_assert_int_eq (VAPI_OK, rv);
+      rv = con.wait_for_response (dl);
+      ck_assert_int_eq (VAPI_OK, rv);
+      auto &response = dl.get_response ();
+      auto rp = response.get_payload ();
+      ck_assert_int_eq (0, rp.retval);
+      printf ("Deleted loopback with sw_if_index %u\n", sw_if_indexes[i]);
+    }
+
+  { // new context
+    Sw_interface_dump d (con);
+    auto &p = d.get_request ().get_payload ();
+    p.name_filter_valid = 0;
+    memset (p.name_filter, 0, sizeof (p.name_filter));
+    auto rv = d.execute ();
+    ck_assert_int_eq (VAPI_OK, rv);
+    rv = con.wait_for_response (d);
+    ck_assert_int_eq (VAPI_OK, rv);
+    auto &rs = d.get_result_set ();
+    for (auto &r : rs)
+      {
+        auto &p = r.get_payload ();
+        for (int i = 0; i < num_ifs; ++i)
+          {
+            ck_assert_int_ne (sw_if_indexes[i], p.sw_if_index);
+          }
+      }
+  }
+}
+
+END_TEST;
+
+struct Create_loopback_cb
+{
+  Create_loopback_cb () : called{0}, sw_if_index{0} {};
+  int called;
+  u32 sw_if_index;
+  bool seen;
+  vapi_error_e operator() (Create_loopback &cl)
+  {
+    auto &r = cl.get_response ();
+    sw_if_index = r.get_payload ().sw_if_index;
+    ++called;
+    return VAPI_OK;
+  }
+};
+
+struct Delete_loopback_cb
+{
+  Delete_loopback_cb () : called{0}, sw_if_index{0} {};
+  int called;
+  u32 sw_if_index;
+  bool seen;
+  vapi_error_e operator() (Delete_loopback &dl)
+  {
+    auto &r = dl.get_response ();
+    ck_assert_int_eq (0, r.get_payload ().retval);
+    ++called;
+    return VAPI_OK;
+  }
+};
+
+template <int num_ifs> struct Sw_interface_dump_cb
+{
+  Sw_interface_dump_cb (std::array<Create_loopback_cb, num_ifs> &cbs)
+      : called{0}, cbs{cbs} {};
+  int called;
+  std::array<Create_loopback_cb, num_ifs> &cbs;
+  vapi_error_e operator() (Sw_interface_dump &d)
+  {
+    for (auto &y : cbs)
+      {
+        y.seen = false;
+      }
+    for (auto &x : d.get_result_set ())
+      {
+        auto &p = x.get_payload ();
+        for (auto &y : cbs)
+          {
+            if (p.sw_if_index == y.sw_if_index)
+              {
+                y.seen = true;
+              }
+          }
+      }
+    for (auto &y : cbs)
+      {
+        ck_assert_int_eq (true, y.seen);
+      }
+    ++called;
+    return VAPI_OK;
+  }
+};
+
+START_TEST (test_loopbacks_2)
+{
+  printf ("--- Create/delete loopbacks by getting a callback ---\n");
+  const auto num_ifs = 5;
+  u8 mac_addresses[num_ifs][6];
+  memset (&mac_addresses, 0, sizeof (mac_addresses));
+  for (int i = 0; i < num_ifs; ++i)
+    {
+      memcpy (&mac_addresses[i], "\1\2\3\4\5\6", 6);
+      mac_addresses[i][5] = i;
+    }
+  std::array<Create_loopback_cb, num_ifs> ccbs;
+  std::array<std::unique_ptr<Create_loopback>, num_ifs> clcs;
+  for (int i = 0; i < num_ifs; ++i)
+    {
+      Create_loopback *cl = new Create_loopback (con, std::ref (ccbs[i]));
+      clcs[i].reset (cl);
+      auto &p = cl->get_request ().get_payload ();
+      memcpy (p.mac_address, mac_addresses[i], sizeof (p.mac_address));
+      auto e = cl->execute ();
+      ck_assert_int_eq (VAPI_OK, e);
+    }
+  con.dispatch ();
+  for (int i = 0; i < num_ifs; ++i)
+    {
+      ck_assert_int_eq (1, ccbs[i].called);
+      printf ("Created loopback with MAC %02x:%02x:%02x:%02x:%02x:%02x --> "
+              "sw_if_index %u\n",
+              mac_addresses[i][0], mac_addresses[i][1], mac_addresses[i][2],
+              mac_addresses[i][3], mac_addresses[i][4], mac_addresses[i][5],
+              ccbs[i].sw_if_index);
+    }
+
+  Sw_interface_dump_cb<num_ifs> swdcb (ccbs);
+  Sw_interface_dump d (con, std::ref (swdcb));
+  auto &p = d.get_request ().get_payload ();
+  p.name_filter_valid = 0;
+  memset (p.name_filter, 0, sizeof (p.name_filter));
+  auto rv = d.execute ();
+  ck_assert_int_eq (VAPI_OK, rv);
+  rv = con.wait_for_response (d);
+  ck_assert_int_eq (VAPI_OK, rv);
+  ck_assert_int_ne (0, swdcb.called);
+  std::array<Delete_loopback_cb, num_ifs> dcbs;
+  std::array<std::unique_ptr<Delete_loopback>, num_ifs> dlcs;
+  for (int i = 0; i < num_ifs; ++i)
+    {
+      Delete_loopback *dl = new Delete_loopback (con, std::ref (dcbs[i]));
+      dlcs[i].reset (dl);
+      auto &p = dl->get_request ().get_payload ();
+      p.sw_if_index = ccbs[i].sw_if_index;
+      dcbs[i].sw_if_index = ccbs[i].sw_if_index;
+      auto e = dl->execute ();
+      ck_assert_int_eq (VAPI_OK, e);
+    }
+  con.dispatch ();
+  for (auto &x : dcbs)
+    {
+      ck_assert_int_eq (true, x.called);
+      printf ("Deleted loopback with sw_if_index %u\n", x.sw_if_index);
+    }
+
+  { // new context
+    Sw_interface_dump d (con);
+    auto &p = d.get_request ().get_payload ();
+    p.name_filter_valid = 0;
+    memset (p.name_filter, 0, sizeof (p.name_filter));
+    auto rv = d.execute ();
+    ck_assert_int_eq (VAPI_OK, rv);
+    rv = con.wait_for_response (d);
+    ck_assert_int_eq (VAPI_OK, rv);
+    auto &rs = d.get_result_set ();
+    for (auto &r : rs)
+      {
+        auto &p = r.get_payload ();
+        for (int i = 0; i < num_ifs; ++i)
+          {
+            ck_assert_int_ne (ccbs[i].sw_if_index, p.sw_if_index);
+          }
+      }
+  }
+}
+
+END_TEST;
+
+START_TEST (test_stats_1)
+{
+  printf ("--- Receive single stats by waiting for response ---\n");
+  Want_stats ws (con);
+  auto &payload = ws.get_request ().get_payload ();
+  payload.enable_disable = 1;
+  payload.pid = getpid ();
+  auto rv = ws.execute ();
+  ck_assert_int_eq (VAPI_OK, rv);
+  Event_registration<Vnet_interface_simple_counters> sc (con);
+  rv = con.wait_for_response (sc);
+  ck_assert_int_eq (VAPI_OK, rv);
+  auto &rs = sc.get_result_set ();
+  int count = 0;
+  for (auto &r : rs)
+    {
+      printf ("simple counters: first_sw_if_index=%u\n",
+              r.get_payload ().first_sw_if_index);
+      ++count;
+    }
+  ck_assert_int_ne (0, count);
+}
+
+END_TEST;
+
+struct Vnet_interface_simple_counters_cb
+{
+  Vnet_interface_simple_counters_cb () : called{0} {};
+  int called;
+  vapi_error_e
+  operator() (Event_registration<Vnet_interface_simple_counters> &e)
+  {
+    ++called;
+    auto &rs = e.get_result_set ();
+    int count = 0;
+    for (auto &r : rs)
+      {
+        printf ("simple counters: first_sw_if_index=%u\n",
+                r.get_payload ().first_sw_if_index);
+        ++count;
+      }
+    ck_assert_int_ne (0, count);
+    return VAPI_OK;
+  }
+};
+
+START_TEST (test_stats_2)
+{
+  printf ("--- Receive single stats by getting a callback ---\n");
+  Want_stats ws (con);
+  auto &payload = ws.get_request ().get_payload ();
+  payload.enable_disable = 1;
+  payload.pid = getpid ();
+  auto rv = ws.execute ();
+  ck_assert_int_eq (VAPI_OK, rv);
+  Vnet_interface_simple_counters_cb cb;
+  Event_registration<Vnet_interface_simple_counters> sc (con, std::ref (cb));
+  rv = con.wait_for_response (sc);
+  ck_assert_int_eq (VAPI_OK, rv);
+  ck_assert_int_ne (0, cb.called);
+}
+
+END_TEST;
+
+struct Vnet_interface_simple_counters_2_cb
+{
+  Vnet_interface_simple_counters_2_cb () : called{0}, total{0} {};
+  int called;
+  int total;
+  vapi_error_e
+  operator() (Event_registration<Vnet_interface_simple_counters> &e)
+  {
+    ++called;
+    auto &rs = e.get_result_set ();
+    int count = 0;
+    for (auto &r : rs)
+      {
+        printf ("simple counters: first_sw_if_index=%u\n",
+                r.get_payload ().first_sw_if_index);
+        ++count;
+      }
+    rs.free_all_responses ();
+    ck_assert_int_ne (0, count);
+    total += count;
+    return VAPI_OK;
+  }
+};
+
+START_TEST (test_stats_3)
+{
+  printf (
+      "--- Receive single stats by getting a callback - clear results ---\n");
+  Want_stats ws (con);
+  auto &payload = ws.get_request ().get_payload ();
+  payload.enable_disable = 1;
+  payload.pid = getpid ();
+  auto rv = ws.execute ();
+  ck_assert_int_eq (VAPI_OK, rv);
+  Vnet_interface_simple_counters_2_cb cb;
+  Event_registration<Vnet_interface_simple_counters> sc (con, std::ref (cb));
+  for (int i = 0; i < 5; ++i)
+    {
+      rv = con.wait_for_response (sc);
+    }
+  ck_assert_int_eq (VAPI_OK, rv);
+  ck_assert_int_eq (5, cb.called);
+  ck_assert_int_eq (5, cb.total);
+}
+
+END_TEST;
+
+START_TEST (test_stats_4)
+{
+  printf ("--- Receive multiple stats by waiting for response ---\n");
+  Want_stats ws (con);
+  auto &payload = ws.get_request ().get_payload ();
+  payload.enable_disable = 1;
+  payload.pid = getpid ();
+  auto rv = ws.execute ();
+  ck_assert_int_eq (VAPI_OK, rv);
+  Event_registration<Vnet_interface_simple_counters> sc (con);
+  Event_registration<Vnet_interface_combined_counters> cc (con);
+  rv = con.wait_for_response (sc);
+  ck_assert_int_eq (VAPI_OK, rv);
+  rv = con.wait_for_response (cc);
+  ck_assert_int_eq (VAPI_OK, rv);
+  int count = 0;
+  for (auto &r : sc.get_result_set ())
+    {
+      printf ("simple counters: first_sw_if_index=%u\n",
+              r.get_payload ().first_sw_if_index);
+      ++count;
+    }
+  ck_assert_int_ne (0, count);
+  count = 0;
+  for (auto &r : cc.get_result_set ())
+    {
+      printf ("combined counters: first_sw_if_index=%u\n",
+              r.get_payload ().first_sw_if_index);
+      ++count;
+    }
+  ck_assert_int_ne (0, count);
+}
+
+END_TEST;
+
+START_TEST (test_unsupported)
+{
+  printf ("--- Unsupported messages ---\n");
+  bool thrown = false;
+  try
+    {
+      Test_fake_msg fake (con);
+    }
+  catch (const Msg_not_available_exception &)
+    {
+      thrown = true;
+      printf ("Constructing unsupported msg not possible - test pass.\n");
+    }
+  ck_assert_int_eq (true, thrown);
+  thrown = false;
+  try
+    {
+      Test_fake_dump fake (con);
+    }
+  catch (const Msg_not_available_exception &)
+    {
+      thrown = true;
+      printf ("Constructing unsupported dump not possible - test pass.\n");
+    }
+  ck_assert_int_eq (true, thrown);
+  thrown = false;
+  try
+    {
+      Event_registration<Test_fake_details> fake (con);
+    }
+  catch (const Msg_not_available_exception &)
+    {
+      thrown = true;
+      printf ("Constructing unsupported event registration not possible - "
+              "test pass.\n");
+    }
+  ck_assert_int_eq (true, thrown);
+}
+
+END_TEST;
+
+Suite *test_suite (void)
+{
+  Suite *s = suite_create ("VAPI test");
+
+  TCase *tc_cpp_api = tcase_create ("C++ API");
+  tcase_set_timeout (tc_cpp_api, 25);
+  tcase_add_checked_fixture (tc_cpp_api, setup, teardown);
+  tcase_add_test (tc_cpp_api, test_show_version_1);
+  tcase_add_test (tc_cpp_api, test_show_version_2);
+  tcase_add_test (tc_cpp_api, test_loopbacks_1);
+  tcase_add_test (tc_cpp_api, test_loopbacks_2);
+  tcase_add_test (tc_cpp_api, test_stats_1);
+  tcase_add_test (tc_cpp_api, test_stats_2);
+  tcase_add_test (tc_cpp_api, test_stats_3);
+  tcase_add_test (tc_cpp_api, test_stats_4);
+  tcase_add_test (tc_cpp_api, test_unsupported);
+  suite_add_tcase (s, tc_cpp_api);
+
+  return s;
+}
+
+int main (int argc, char *argv[])
+{
+  if (3 != argc)
+    {
+      printf ("Invalid argc==`%d'\n", argc);
+      return EXIT_FAILURE;
+    }
+  app_name = argv[1];
+  api_prefix = argv[2];
+  printf ("App name: `%s', API prefix: `%s'\n", app_name, api_prefix);
+
+  int number_failed;
+  Suite *s;
+  SRunner *sr;
+
+  s = test_suite ();
+  sr = srunner_create (s);
+
+  srunner_run_all (sr, CK_NORMAL);
+  number_failed = srunner_ntests_failed (sr);
+  srunner_free (sr);
+  return (number_failed == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */