VPP Object Model (VOM)

The VOM is a C++ library for use by clients/agents of VPP for programming
state. It uses the binary APIs to do so. Various other common client side
functions are also provided. Please see om.hpp for a more detailed description.

Change-Id: Ib756bfe99817093815a9e26ccf464aa5583fc523
Signed-off-by: Neale Ranns <neale.ranns@cisco.com>
Co-authored-by: Mohsin Kazmi <sykazmi@cisco.com>

2 files changed, 1486 insertions, 20 deletions

diff --git a/test/ext/Makefile b/test/ext/Makefile
index 1bd035daa13..58015539d92 100644
--- a/test/ext/Makefile
+++ b/test/ext/Makefile
@@ -1,38 +1,57 @@
-BINDIR = $(BR)/vapi_test/
-CBIN = $(addprefix $(BINDIR), vapi_c_test)
-CPPBIN = $(addprefix $(BINDIR), vapi_cpp_test)
+VAPI_BINDIR = $(BR)/vapi_test/
+VAPI_CBIN = $(addprefix $(VAPI_BINDIR), vapi_c_test)
+VAPI_CPPBIN = $(addprefix $(VAPI_BINDIR), vapi_cpp_test)
+VOM_BINDIR = $(BR)/vom_test/
+VOM_BIN = $(addprefix $(VOM_BINDIR), vom_test)
 
 ifeq ($(filter centos,$(OS_ID)),$(OS_ID))
-CPPBIN=
+VAPI_CPPBIN=
 endif
 
-LIBS = -L$(VPP_TEST_BUILD_DIR)/vpp/.libs/ -L$(VPP_TEST_BUILD_DIR)/vpp/vpp-api/vapi/.libs/ -lvppinfra -lvlibmemoryclient -lsvm -lpthread -lcheck -lrt -lm -lvapiclient
+VAPI_LIBS = -L$(VPP_TEST_BUILD_DIR)/vpp/.libs/ -L$(VPP_TEST_BUILD_DIR)/vpp/vpp-api/vapi/.libs/ -lvppinfra -lvlibmemoryclient -lsvm -lpthread -lcheck -lrt -lm -lvapiclient
 ifneq ($(filter opensuse,$(OS_ID)),$(OS_ID))
-LIBS += -lsubunit
+VAPI_LIBS += -lsubunit
 endif
-CFLAGS = -std=gnu99 -g -Wall -pthread -I$(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$(BINDIR)
+CFLAGS = -std=gnu99 -g -Wall -pthread -I$(WS_ROOT)/src -I$(VPP_TEST_INSTALL_PATH)/vpp/include -I$(VAPI_BINDIR)
+CPPFLAGS = -std=c++11 -g -Wall -pthread -I$(WS_ROOT)/src -I$(VPP_TEST_INSTALL_PATH)/vpp/include -I$(VAPI_BINDIR)
 
-all: $(CBIN) $(CPPBIN)
+all: $(VAPI_CBIN) $(VAPI_CPPBIN) $(VOM_BINDIR) $(VOM_BIN)
 
-$(BINDIR):
-	mkdir -p $(BINDIR)
+$(VAPI_BINDIR):
+	mkdir -p $(VAPI_BINDIR)
 
 CSRC = vapi_c_test.c
 
-$(BINDIR)/fake.api.vapi.h: fake.api.json $(WS_ROOT)/src/vpp-api/vapi/vapi_c_gen.py | $(BINDIR)
-	$(WS_ROOT)/src/vpp-api/vapi/vapi_c_gen.py --prefix $(BINDIR) $<
+$(VAPI_BINDIR)/fake.api.vapi.h: fake.api.json $(WS_ROOT)/src/vpp-api/vapi/vapi_c_gen.py | $(VAPI_BINDIR)
+	$(WS_ROOT)/src/vpp-api/vapi/vapi_c_gen.py --prefix $(VAPI_BINDIR) $<
 
-$(BINDIR)/fake.api.vapi.hpp: fake.api.json $(WS_ROOT)/src/vpp-api/vapi/vapi_cpp_gen.py | $(BINDIR)
-	$(WS_ROOT)/src/vpp-api/vapi/vapi_cpp_gen.py --prefix $(BINDIR) $<
+$(VAPI_BINDIR)/fake.api.vapi.hpp: fake.api.json $(WS_ROOT)/src/vpp-api/vapi/vapi_cpp_gen.py | $(VAPI_BINDIR)
+	$(WS_ROOT)/src/vpp-api/vapi/vapi_cpp_gen.py --prefix $(VAPI_BINDIR) $<
 
-$(CBIN): $(CSRC) $(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 $(BINDIR)/fake.api.vapi.h
-	$(CC) -o $@ $(CFLAGS) $(CSRC) $(LIBS)
+$(VAPI_CBIN): $(CSRC) $(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 $(VAPI_BINDIR)/fake.api.vapi.h
+	$(CC) -o $@ $(CFLAGS) $(CSRC) $(VAPI_LIBS)
 
 CPPSRC = vapi_cpp_test.cpp
 
-$(CPPBIN): $(CPPSRC) $(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 $(BINDIR)/fake.api.vapi.hpp
-	$(CXX) -o $@ $(CPPFLAGS) $(CPPSRC) $(LIBS)
+$(VAPI_CPPBIN): $(CPPSRC) $(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 $(VAPI_BINDIR)/fake.api.vapi.hpp
+	$(CXX) -o $@ $(CPPFLAGS) $(CPPSRC) $(VAPI_LIBS)
+
+VOM_CPPSRC = vom_test.cpp
+
+$(VOM_BINDIR):
+	mkdir -p $(VOM_BINDIR)
+
+LIB_VOM = $(VPP_TEST_BUILD_DIR)/vpp/vpp-api/vom/.libs/libvom.so
+VOM_LIBS = $(LIB_VOM) 	\
+	-lboost_log					\
+	-lboost_thread					\
+	-lboost_system					\
+	-lboost_filesystem				\
+	-lboost_unit_test_framework			\
+	$(VAPI_LIBS)
+
+$(VOM_BIN): $(VOM_CPPSRC) $(VOM_BINDIR) $(LIB_VOM) $(VPP_TEST_BUILD_DIR)/vpp/vpp-api/vapi/.libs/libvapiclient.so
+	$(CXX) -o $@ $(CPPFLAGS) -DBOOST_LOG_DYN_LINK -O0 -g $(VOM_CPPSRC) $(VOM_LIBS)
 
 clean:
-	rm -rf $(BINDIR)
+	rm -rf $(VAPI_BINDIR) $(VOM_BINDIR)
diff --git a/test/ext/vom_test.cpp b/test/ext/vom_test.cpp
new file mode 100644
index 00000000000..4c72fbc1aaa
--- /dev/null
+++ b/test/ext/vom_test.cpp
@@ -0,0 +1,1447 @@
+/*
+ * Test suite for class VppOM
+ *
+ * Copyright (c) 2017 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+#define BOOST_TEST_MODULE "VPP OBJECT MODEL"
+#define BOOST_TEST_DYN_LINK
+
+#include <boost/test/unit_test.hpp>
+#include <boost/assign/list_inserter.hpp>
+
+
+#include <iostream>
+#include <deque>
+
+#include "vom/om.hpp"
+#include "vom/interface.hpp"
+#include "vom/l2_binding.hpp"
+#include "vom/l3_binding.hpp"
+#include "vom/bridge_domain.hpp"
+#include "vom/bridge_domain_entry.hpp"
+#include "vom/bridge_domain_arp_entry.hpp"
+#include "vom/prefix.hpp"
+#include "vom/route.hpp"
+#include "vom/route_domain.hpp"
+#include "vom/vxlan_tunnel.hpp"
+#include "vom/sub_interface.hpp"
+#include "vom/acl_list.hpp"
+#include "vom/acl_binding.hpp"
+#include "vom/acl_l3_rule.hpp"
+#include "vom/acl_l2_rule.hpp"
+#include "vom/arp_proxy_config.hpp"
+#include "vom/arp_proxy_binding.hpp"
+#include "vom/ip_unnumbered.hpp"
+#include "vom/interface_ip6_nd.hpp"
+#include "vom/interface_span.hpp"
+#include "vom/neighbour.hpp"
+#include "vom/nat_static.hpp"
+#include "vom/nat_binding.hpp"
+
+using namespace boost;
+using namespace VOM;
+
+/**
+ * An expectation exception
+ */
+class ExpException
+{
+public:
+    ExpException(unsigned int number)
+    {
+        // a neat place to add a break point
+        std::cout << "  ExpException here: " << number << std::endl;
+    }
+};
+
+class MockListener : public interface::event_listener,
+                     public interface::stat_listener
+{
+    void handle_interface_stat(interface::stats_cmd *cmd)
+    {
+    }
+    void handle_interface_event(interface::events_cmd *cmd)
+    {
+    }
+};
+
+class MockCmdQ : public HW::cmd_q
+{
+public:
+    MockCmdQ():
+        m_strict_order(true)
+    {
+    }
+    virtual ~MockCmdQ()
+    {
+    }
+    void expect(cmd *f)
+    {
+        m_exp_queue.push_back(f);
+    }
+    void enqueue(cmd *f)
+    {
+        m_act_queue.push_back(f);
+    }
+    void enqueue(std::queue<cmd*> &cmds)
+    {
+        while (cmds.size())
+        {
+            m_act_queue.push_back(cmds.front());
+            cmds.pop();
+        }
+    }
+    void enqueue(std::shared_ptr<cmd> f)
+    {
+        m_act_queue.push_back(f.get());
+    }
+
+    void dequeue(cmd *f)
+    {
+    }
+
+    void dequeue(std::shared_ptr<cmd> cmd)
+    {
+    }
+
+    void strict_order(bool on)
+    {
+        m_strict_order = on;
+    }
+
+    bool is_empty()
+    {
+        return ((0 == m_exp_queue.size()) &&
+                (0 == m_act_queue.size()));
+    }
+
+    rc_t write()
+    {
+        cmd *f_exp, *f_act;
+        rc_t rc = rc_t::OK;
+
+        while (m_act_queue.size())
+        {
+            bool matched = false;
+            auto it_exp = m_exp_queue.begin();
+            auto it_act = m_act_queue.begin();
+
+            f_act = *it_act;
+
+            std::cout << " Act: " << f_act->to_string() << std::endl;
+            while (it_exp != m_exp_queue.end())
+            {
+                f_exp = *it_exp;
+                try
+                {
+                    std::cout << "  Exp: " << f_exp->to_string() << std::endl;
+
+                    if (typeid(*f_exp) != typeid(*f_act))
+                    {
+                        throw ExpException(1);
+                    }
+
+                    if (typeid(*f_exp) == typeid(interface::af_packet_create_cmd))
+                    {
+                        rc = handle_derived<interface::af_packet_create_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(interface::loopback_create_cmd))
+                    {
+                        rc = handle_derived<interface::loopback_create_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(interface::loopback_delete_cmd))
+                    {
+                        rc = handle_derived<interface::loopback_delete_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(interface::af_packet_delete_cmd))
+                    {
+                        rc = handle_derived<interface::af_packet_delete_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(interface::state_change_cmd))
+                    {
+                        rc = handle_derived<interface::state_change_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(interface::set_table_cmd))
+                    {
+                        rc = handle_derived<interface::set_table_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(interface::set_mac_cmd))
+                    {
+                        rc = handle_derived<interface::set_mac_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(interface::set_tag))
+                    {
+                        rc = handle_derived<interface::set_tag>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(route_domain::create_cmd))
+                    {
+			rc = handle_derived<route_domain::create_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(route_domain::delete_cmd))
+                    {
+                        rc = handle_derived<route_domain::delete_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(route::ip_route::update_cmd))
+                    {
+			rc = handle_derived<route::ip_route::update_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(route::ip_route::delete_cmd))
+                    {
+                        rc = handle_derived<route::ip_route::delete_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(neighbour::create_cmd))
+                    {
+			rc = handle_derived<neighbour::create_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(neighbour::delete_cmd))
+                    {
+                        rc = handle_derived<neighbour::delete_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(l3_binding::bind_cmd))
+                    {
+                        rc = handle_derived<l3_binding::bind_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(l3_binding::unbind_cmd))
+                    {
+                        rc = handle_derived<l3_binding::unbind_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(bridge_domain::create_cmd))
+                    {
+                        rc = handle_derived<bridge_domain::create_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(bridge_domain::delete_cmd))
+                    {
+                        rc = handle_derived<bridge_domain::delete_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(bridge_domain_entry::create_cmd))
+                    {
+                        rc = handle_derived<bridge_domain_entry::create_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(bridge_domain_entry::delete_cmd))
+                    {
+                        rc = handle_derived<bridge_domain_entry::delete_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(bridge_domain_arp_entry::create_cmd))
+                    {
+                        rc = handle_derived<bridge_domain_arp_entry::create_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(bridge_domain_arp_entry::delete_cmd))
+                    {
+                        rc = handle_derived<bridge_domain_arp_entry::delete_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(l2_binding::bind_cmd))
+                    {
+                        rc = handle_derived<l2_binding::bind_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(l2_binding::unbind_cmd))
+                    {
+                        rc = handle_derived<l2_binding::unbind_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(l2_binding::set_vtr_op_cmd))
+                    {
+                        rc = handle_derived<l2_binding::set_vtr_op_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(vxlan_tunnel::create_cmd))
+                    {
+                        rc = handle_derived<vxlan_tunnel::create_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(vxlan_tunnel::delete_cmd))
+                    {
+                        rc = handle_derived<vxlan_tunnel::delete_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(sub_interface::create_cmd))
+                    {
+                        rc = handle_derived<sub_interface::create_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(sub_interface::delete_cmd))
+                    {
+                        rc = handle_derived<sub_interface::delete_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(ACL::l3_list::update_cmd))
+                    {
+                        rc = handle_derived<ACL::l3_list::update_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(ACL::l3_list::delete_cmd))
+                    {
+                        rc = handle_derived<ACL::l3_list::delete_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(ACL::l3_binding::bind_cmd))
+                    {
+                        rc = handle_derived<ACL::l3_binding::bind_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(ACL::l3_binding::unbind_cmd))
+                    {
+                        rc = handle_derived<ACL::l3_binding::unbind_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(ACL::l2_list::update_cmd))
+                    {
+                        rc = handle_derived<ACL::l2_list::update_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(ACL::l2_list::delete_cmd))
+                    {
+                        rc = handle_derived<ACL::l2_list::delete_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(ACL::l2_binding::bind_cmd))
+                    {
+                        rc = handle_derived<ACL::l2_binding::bind_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(ACL::l2_binding::unbind_cmd))
+                    {
+                        rc = handle_derived<ACL::l2_binding::unbind_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(arp_proxy_binding::bind_cmd))
+                    {
+                        rc = handle_derived<arp_proxy_binding::bind_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(arp_proxy_binding::unbind_cmd))
+                    {
+                        rc = handle_derived<arp_proxy_binding::unbind_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(arp_proxy_config::config_cmd))
+                    {
+                        rc = handle_derived<arp_proxy_config::config_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(arp_proxy_config::unconfig_cmd))
+                    {
+                        rc = handle_derived<arp_proxy_config::unconfig_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(ip_unnumbered::config_cmd))
+                    {
+                        rc = handle_derived<ip_unnumbered::config_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(ip_unnumbered::unconfig_cmd))
+                    {
+                        rc = handle_derived<ip_unnumbered::unconfig_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(ip6nd_ra_config::config_cmd))
+                    {
+                        rc = handle_derived<ip6nd_ra_config::config_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(ip6nd_ra_config::unconfig_cmd))
+                    {
+                        rc = handle_derived<ip6nd_ra_config::unconfig_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(ip6nd_ra_prefix::config_cmd))
+                    {
+                        rc = handle_derived<ip6nd_ra_prefix::config_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(ip6nd_ra_prefix::unconfig_cmd))
+                    {
+                        rc = handle_derived<ip6nd_ra_prefix::unconfig_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(interface_span::config_cmd))
+                    {
+                        rc = handle_derived<interface_span::config_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(interface_span::unconfig_cmd))
+                    {
+                        rc = handle_derived<interface_span::unconfig_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(nat_static::create_44_cmd))
+                    {
+                        rc = handle_derived<nat_static::create_44_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(nat_static::delete_44_cmd))
+                    {
+                        rc = handle_derived<nat_static::delete_44_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(nat_binding::bind_44_input_cmd))
+                    {
+                        rc = handle_derived<nat_binding::bind_44_input_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(nat_binding::unbind_44_input_cmd))
+                    {
+                        rc = handle_derived<nat_binding::unbind_44_input_cmd>(f_exp, f_act);
+                    }
+                    else if (typeid(*f_exp) == typeid(interface::events_cmd))
+                    {
+                        rc = handle_derived<interface::events_cmd>(f_exp, f_act);
+                    }
+                    else
+                    {
+                        throw ExpException(2);
+                    }
+
+                    // if we get here then we found the match.
+                    m_exp_queue.erase(it_exp);
+                    m_act_queue.erase(it_act);
+                    delete f_exp;
+                    delete f_act;
+
+                    // return any injected failures to the agent
+                    if (rc_t::OK != rc && rc_t::NOOP != rc)
+                    {
+                        return (rc);
+                    }
+
+                    matched = true;
+                    break;
+                }
+                catch (ExpException &e)
+                {
+                    // The expected and actual do not match
+                    if (m_strict_order)
+                    {
+                        // in strict ordering mode this is fatal, so rethrow
+                        throw e;
+                    }
+                    else
+                    {
+                        // move the iterator onto the next in the expected list and
+                        // check for a match
+                        ++it_exp;
+                    }
+                }
+            }
+
+            if (!matched)
+                throw ExpException(3);
+        }
+
+        return (rc);
+    }
+private:
+
+    template <typename T>
+    rc_t handle_derived(const cmd *f_exp, cmd *f_act)
+    {
+        const T *i_exp;
+        T *i_act;
+
+        i_exp = dynamic_cast<const T*>(f_exp);
+        i_act = dynamic_cast<T*>(f_act);
+        if (!(*i_exp == *i_act))
+        {
+            throw ExpException(4);
+        }
+        // pass the data and return code to the agent
+        i_act->item() = i_exp->item();
+
+        return (i_act->item().rc());
+    }
+
+    // The Q to push the expectations on
+    std::deque<cmd*> m_exp_queue;
+
+    // the queue to push the actual events on
+    std::deque<cmd*> m_act_queue;
+
+    // control whether the expected queue is strictly ordered.
+    bool m_strict_order;
+};
+
+class VppInit {
+public:
+    std::string name;
+    MockCmdQ *f;
+
+    VppInit()
+        : name("vpp-ut"),
+          f(new MockCmdQ())
+    {
+        HW::init(f);
+        OM::init();
+        logger().set(log_level_t::DEBUG);
+    }
+
+    ~VppInit() {
+        delete f;
+    }
+};
+
+BOOST_AUTO_TEST_SUITE(VppOM_test)
+
+#define TRY_CHECK_RC(stmt)                    \
+{                                             \
+    try {                                     \
+        BOOST_CHECK(rc_t::OK == stmt);        \
+    }                                         \
+    catch (ExpException &e)                   \
+    {                                         \
+        BOOST_CHECK(false);                   \
+    }                                         \
+    BOOST_CHECK(vi.f->is_empty());            \
+}
+
+#define TRY_CHECK(stmt)                       \
+{                                             \
+    try {                                     \
+        stmt;                                 \
+    }                                         \
+    catch (ExpException &e)                   \
+    {                                         \
+        BOOST_CHECK(false);                   \
+    }                                         \
+    BOOST_CHECK(vi.f->is_empty());            \
+}
+
+#define ADD_EXPECT(stmt)                      \
+    vi.f->expect(new stmt)
+
+#define STRICT_ORDER_OFF()                        \
+    vi.f->strict_order(false)
+
+BOOST_AUTO_TEST_CASE(test_interface) {
+    VppInit vi;
+    const std::string go = "GeorgeOrwell";
+    const std::string js = "JohnSteinbeck";
+    rc_t rc = rc_t::OK;
+
+    /*
+     * George creates and deletes the interface
+     */
+    std::string itf1_name = "afpacket1";
+    interface itf1(itf1_name,
+                   interface::type_t::AFPACKET,
+                   interface::admin_state_t::UP);
+
+    /*
+     * set the expectation for a afpacket interface create.
+     *  2 is the interface handle VPP [mock] assigns
+     */
+    HW::item<handle_t> hw_ifh(2, rc_t::OK);
+    ADD_EXPECT(interface::af_packet_create_cmd(hw_ifh, itf1_name));
+
+    HW::item<interface::admin_state_t> hw_as_up(interface::admin_state_t::UP, rc_t::OK);
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up, hw_ifh));
+
+    TRY_CHECK_RC(OM::write(go, itf1));
+
+    HW::item<interface::admin_state_t> hw_as_down(interface::admin_state_t::DOWN, rc_t::OK);
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_ifh));
+    ADD_EXPECT(interface::af_packet_delete_cmd(hw_ifh, itf1_name));
+
+    TRY_CHECK(OM::remove(go));
+
+    /*
+     * George creates the interface, then John brings it down.
+     * George's remove is a no-op, sice John also owns the interface
+     */
+    interface itf1b(itf1_name,
+                    interface::type_t::AFPACKET,
+                    interface::admin_state_t::DOWN);
+
+    ADD_EXPECT(interface::af_packet_create_cmd(hw_ifh, itf1_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up, hw_ifh));
+    TRY_CHECK_RC(OM::write(go, itf1));
+
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_ifh));
+    TRY_CHECK_RC(OM::write(js, itf1b));
+
+    TRY_CHECK(OM::remove(go));
+
+    ADD_EXPECT(interface::af_packet_delete_cmd(hw_ifh, itf1_name));
+    TRY_CHECK(OM::remove(js));
+
+    /*
+     * George adds an interface, then we flush all of Geroge's state
+     */
+    ADD_EXPECT(interface::af_packet_create_cmd(hw_ifh, itf1_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up, hw_ifh));
+    TRY_CHECK_RC(OM::write(go, itf1));
+
+    TRY_CHECK(OM::mark(go));
+
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_ifh));
+    ADD_EXPECT(interface::af_packet_delete_cmd(hw_ifh, itf1_name));
+    TRY_CHECK(OM::sweep(go));
+
+    /*
+     * George adds an interface. mark stale. update the same interface. sweep
+     * and expect no delete
+     */
+    ADD_EXPECT(interface::af_packet_create_cmd(hw_ifh, itf1_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_ifh));
+    TRY_CHECK_RC(OM::write(go, itf1b));
+
+    TRY_CHECK(OM::mark(go));
+
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up, hw_ifh));
+    TRY_CHECK_RC(OM::write(go, itf1));
+
+    TRY_CHECK(OM::sweep(go));
+
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_ifh));
+    ADD_EXPECT(interface::af_packet_delete_cmd(hw_ifh, itf1_name));
+    TRY_CHECK(OM::remove(go));
+
+    /*
+     * George adds an insterface, then we mark that state. Add a second interface
+     * an flush the first that is now stale.
+     */
+    ADD_EXPECT(interface::af_packet_create_cmd(hw_ifh, itf1_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up, hw_ifh));
+    TRY_CHECK_RC(OM::write(go, itf1));
+
+    TRY_CHECK(OM::mark(go));
+
+    std::string itf2_name = "afpacket2";
+    interface itf2(itf2_name,
+                   interface::type_t::AFPACKET,
+                   interface::admin_state_t::UP);
+    HW::item<handle_t> hw_ifh2(3, rc_t::OK);
+
+    ADD_EXPECT(interface::af_packet_create_cmd(hw_ifh2, itf2_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up, hw_ifh2));
+    TRY_CHECK_RC(OM::write(go, itf2));
+
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_ifh));
+    ADD_EXPECT(interface::af_packet_delete_cmd(hw_ifh, itf1_name));
+    TRY_CHECK(OM::sweep(go));
+
+    TRY_CHECK(OM::mark(go));
+
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_ifh2));
+    ADD_EXPECT(interface::af_packet_delete_cmd(hw_ifh2, itf2_name));
+    TRY_CHECK(OM::sweep(go));
+}
+
+BOOST_AUTO_TEST_CASE(test_bvi) {
+    VppInit vi;
+    const std::string ernest = "ErnestHemmingway";
+    const std::string graham = "GrahamGreene";
+    rc_t rc = rc_t::OK;
+    l3_binding *l3;
+
+    HW::item<interface::admin_state_t> hw_as_up(interface::admin_state_t::UP,
+                                                rc_t::OK);
+    HW::item<interface::admin_state_t> hw_as_down(interface::admin_state_t::DOWN,
+                                                  rc_t::OK);
+
+    /*
+     * Enrest creates a BVI with address 10.10.10.10/24
+     */
+    route::prefix_t pfx_10("10.10.10.10", 24);
+
+    const std::string bvi_name = "bvi1";
+    interface itf(bvi_name,
+                  interface::type_t::BVI,
+                  interface::admin_state_t::UP);
+    HW::item<handle_t> hw_ifh(4, rc_t::OK);
+    HW::item<route::prefix_t> hw_pfx_10(pfx_10, rc_t::OK);
+
+    ADD_EXPECT(interface::loopback_create_cmd(hw_ifh, bvi_name));
+    ADD_EXPECT(interface::set_tag(hw_ifh, bvi_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up, hw_ifh));
+    TRY_CHECK_RC(OM::write(ernest, itf));
+
+    l3 = new l3_binding(itf, pfx_10);
+    HW::item<bool> hw_l3_bind(true, rc_t::OK);
+    HW::item<bool> hw_l3_unbind(false, rc_t::OK);
+    ADD_EXPECT(l3_binding::bind_cmd(hw_l3_bind, hw_ifh.data(), pfx_10));
+    TRY_CHECK_RC(OM::write(ernest, *l3));
+
+    // change the MAC address on the BVI
+    interface itf_new_mac(bvi_name,
+                          interface::type_t::BVI,
+                          interface::admin_state_t::UP);
+    l2_address_t l2_addr({0,1,2,3,4,5});
+    HW::item<l2_address_t> hw_mac(l2_addr, rc_t::OK);
+    itf_new_mac.set(l2_addr);
+    ADD_EXPECT(interface::set_mac_cmd(hw_mac, hw_ifh));
+    TRY_CHECK_RC(OM::write(ernest, itf_new_mac));
+
+    // create/write the interface to the OM again but with an unset MAC
+    // this should not generate a MAC address update
+    TRY_CHECK_RC(OM::write(ernest, itf));
+
+    // change the MAC address on the BVI - again
+    interface itf_new_mac2(bvi_name,
+                           interface::type_t::BVI,
+                           interface::admin_state_t::UP);
+    l2_address_t l2_addr2({0,1,2,3,4,6});
+    HW::item<l2_address_t> hw_mac2(l2_addr2, rc_t::OK);
+    itf_new_mac2.set(l2_addr2);
+    ADD_EXPECT(interface::set_mac_cmd(hw_mac2, hw_ifh));
+    TRY_CHECK_RC(OM::write(ernest, itf_new_mac2));
+
+    delete l3;
+    ADD_EXPECT(l3_binding::unbind_cmd(hw_l3_unbind, hw_ifh.data(), pfx_10));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_ifh));
+    ADD_EXPECT(interface::loopback_delete_cmd(hw_ifh));
+    TRY_CHECK(OM::remove(ernest));
+
+    /*
+     * Graham creates a BVI with address 10.10.10.10/24 in Routing Domain
+     */
+    route_domain rd(1);
+    HW::item<bool> hw_rd4_create(true, rc_t::OK);
+    HW::item<bool> hw_rd4_delete(false, rc_t::OK);
+    HW::item<bool> hw_rd6_create(true, rc_t::OK);
+    HW::item<bool> hw_rd6_delete(false, rc_t::OK);
+    HW::item<route::table_id_t> hw_rd4_bind(1, rc_t::OK);
+    HW::item<route::table_id_t> hw_rd4_unbind(route::DEFAULT_TABLE, rc_t::OK);
+    HW::item<route::table_id_t> hw_rd6_bind(1, rc_t::OK);
+    HW::item<route::table_id_t> hw_rd6_unbind(route::DEFAULT_TABLE, rc_t::OK);
+    ADD_EXPECT(route_domain::create_cmd(hw_rd4_create, l3_proto_t::IPV4, 1));
+    ADD_EXPECT(route_domain::create_cmd(hw_rd6_create, l3_proto_t::IPV6, 1));
+    TRY_CHECK_RC(OM::write(graham, rd));
+
+    const std::string bvi2_name = "bvi2";
+    interface *itf2 = new interface(bvi2_name,
+                                    interface::type_t::BVI,
+                                    interface::admin_state_t::UP,
+                                    rd);
+    HW::item<handle_t> hw_ifh2(5, rc_t::OK);
+
+    ADD_EXPECT(interface::loopback_create_cmd(hw_ifh2, bvi2_name));
+    ADD_EXPECT(interface::set_tag(hw_ifh2, bvi2_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up, hw_ifh2));
+    ADD_EXPECT(interface::set_table_cmd(hw_rd4_bind, l3_proto_t::IPV4, hw_ifh2));
+    ADD_EXPECT(interface::set_table_cmd(hw_rd6_bind, l3_proto_t::IPV6, hw_ifh2));
+
+    TRY_CHECK_RC(OM::write(graham, *itf2));
+
+    l3 = new l3_binding(*itf2, pfx_10);
+    ADD_EXPECT(l3_binding::bind_cmd(hw_l3_bind, hw_ifh2.data(), pfx_10));
+    TRY_CHECK_RC(OM::write(graham, *l3));
+
+    delete l3;
+    delete itf2;
+
+    ADD_EXPECT(l3_binding::unbind_cmd(hw_l3_unbind, hw_ifh2.data(), pfx_10));
+    ADD_EXPECT(interface::set_table_cmd(hw_rd4_unbind, l3_proto_t::IPV4, hw_ifh2));
+    ADD_EXPECT(interface::set_table_cmd(hw_rd6_unbind, l3_proto_t::IPV6, hw_ifh2));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_ifh2));
+    ADD_EXPECT(interface::loopback_delete_cmd(hw_ifh2));
+    ADD_EXPECT(route_domain::delete_cmd(hw_rd4_delete, l3_proto_t::IPV4, 1));
+    ADD_EXPECT(route_domain::delete_cmd(hw_rd6_delete, l3_proto_t::IPV6, 1));
+    TRY_CHECK(OM::remove(graham));
+}
+
+BOOST_AUTO_TEST_CASE(test_bridge) {
+    VppInit vi;
+    const std::string franz = "FranzKafka";
+    const std::string dante = "Dante";
+    rc_t rc = rc_t::OK;
+
+    /*
+     * Franz creates an interface, Bridge-domain, then binds the two
+     */
+
+    // interface create
+    std::string itf1_name = "afpacket1";
+    interface itf1(itf1_name,
+                   interface::type_t::AFPACKET,
+                   interface::admin_state_t::UP);
+
+    HW::item<handle_t> hw_ifh(3, rc_t::OK);
+    HW::item<interface::admin_state_t> hw_as_up(interface::admin_state_t::UP,
+                                                rc_t::OK);
+    ADD_EXPECT(interface::af_packet_create_cmd(hw_ifh, itf1_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up, hw_ifh));
+
+    TRY_CHECK_RC(OM::write(franz, itf1));
+
+    // bridge-domain create
+    bridge_domain bd1(33);
+
+    HW::item<uint32_t> hw_bd(33, rc_t::OK);
+    ADD_EXPECT(bridge_domain::create_cmd(hw_bd));
+
+    TRY_CHECK_RC(OM::write(franz, bd1));
+
+    // L2-interface create and bind
+    // this needs to be delete'd before the flush below, since it too maintains
+    // references to the BD and Interface
+    l2_binding *l2itf = new l2_binding(itf1, bd1);
+    HW::item<bool> hw_l2_bind(true, rc_t::OK);
+
+    ADD_EXPECT(l2_binding::bind_cmd(hw_l2_bind, hw_ifh.data(), hw_bd.data(), false));
+    TRY_CHECK_RC(OM::write(franz, *l2itf));
+
+    /*
+     * Dante adds an interface to the same BD
+     */
+    std::string itf2_name = "afpacket2";
+    interface itf2(itf2_name,
+                   interface::type_t::AFPACKET,
+                   interface::admin_state_t::UP);
+
+    HW::item<handle_t> hw_ifh2(4, rc_t::OK);
+    ADD_EXPECT(interface::af_packet_create_cmd(hw_ifh2, itf2_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up, hw_ifh2));
+    TRY_CHECK_RC(OM::write(dante, itf2));
+
+    // BD add is a no-op since it exists
+    TRY_CHECK_RC(OM::write(dante, bd1));
+
+    l2_binding *l2itf2 = new l2_binding(itf2, bd1);
+    HW::item<l2_binding::l2_vtr_op_t> hw_set_vtr(l2_binding::l2_vtr_op_t::L2_VTR_POP_1, rc_t::OK);
+    l2itf2->set(l2_binding::l2_vtr_op_t::L2_VTR_POP_1, 68);
+
+    ADD_EXPECT(l2_binding::bind_cmd(hw_l2_bind, hw_ifh2.data(), hw_bd.data(), false));
+    ADD_EXPECT(l2_binding::set_vtr_op_cmd(hw_set_vtr, hw_ifh2.data(), 68));
+    TRY_CHECK_RC(OM::write(dante, *l2itf2));
+
+    // Add some static entries to the bridge-domain
+    HW::item<bool> hw_be1(true, rc_t::OK);
+    mac_address_t mac1({0,1,2,3,4,5});
+    bridge_domain_entry *be1 = new bridge_domain_entry(bd1, mac1, itf2);
+    ADD_EXPECT(bridge_domain_entry::create_cmd(hw_be1, mac1, bd1.id(), hw_ifh2.data()));
+    TRY_CHECK_RC(OM::write(dante, *be1));
+
+    // Add some entries to the bridge-domain ARP termination table
+    HW::item<bool> hw_bea1(true, rc_t::OK);
+    boost::asio::ip::address ip1 = boost::asio::ip::address::from_string("10.10.10.10");
+
+    bridge_domain_arp_entry *bea1 = new bridge_domain_arp_entry(bd1, mac1, ip1);
+    ADD_EXPECT(bridge_domain_arp_entry::create_cmd(hw_be1, bd1.id(), mac1, ip1));
+    TRY_CHECK_RC(OM::write(dante, *bea1));
+
+    // flush Franz's state
+    delete l2itf;
+    HW::item<interface::admin_state_t> hw_as_down(interface::admin_state_t::DOWN,
+                                                  rc_t::OK);
+    ADD_EXPECT(l2_binding::unbind_cmd(hw_l2_bind, hw_ifh.data(), hw_bd.data(), false));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_ifh));
+    ADD_EXPECT(interface::af_packet_delete_cmd(hw_ifh, itf1_name));
+    TRY_CHECK(OM::remove(franz));
+
+    // flush Dante's state - the order the interface and BD are deleted
+    // is an uncontrollable artifact of the C++ object destruction.
+    delete l2itf2;
+    delete be1;
+    delete bea1;
+    STRICT_ORDER_OFF();
+    ADD_EXPECT(l2_binding::unbind_cmd(hw_l2_bind, hw_ifh2.data(), hw_bd.data(), false));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_ifh2));
+    ADD_EXPECT(interface::af_packet_delete_cmd(hw_ifh2, itf2_name));
+    ADD_EXPECT(bridge_domain_entry::delete_cmd(hw_be1, mac1, bd1.id()));
+    ADD_EXPECT(bridge_domain_arp_entry::delete_cmd(hw_be1, bd1.id(), mac1, ip1));
+    ADD_EXPECT(bridge_domain::delete_cmd(hw_bd));
+    TRY_CHECK(OM::remove(dante));
+}
+
+BOOST_AUTO_TEST_CASE(test_vxlan) {
+    VppInit vi;
+    const std::string franz = "FranzKafka";
+    rc_t rc = rc_t::OK;
+
+    /*
+     * Franz creates an interface, Bridge-domain, then binds the two
+     */
+
+    // VXLAN create
+    vxlan_tunnel::endpoint_t ep(boost::asio::ip::address::from_string("10.10.10.10"),
+                               boost::asio::ip::address::from_string("10.10.10.11"),
+                               322);
+
+    vxlan_tunnel vxt(ep.src, ep.dst, ep.vni);
+
+    HW::item<handle_t> hw_vxt(3, rc_t::OK);
+    ADD_EXPECT(vxlan_tunnel::create_cmd(hw_vxt, "don't-care", ep));
+
+    TRY_CHECK_RC(OM::write(franz, vxt));
+
+    // bridge-domain create
+    bridge_domain bd1(33);
+
+    HW::item<uint32_t> hw_bd(33, rc_t::OK);
+    ADD_EXPECT(bridge_domain::create_cmd(hw_bd));
+
+    TRY_CHECK_RC(OM::write(franz, bd1));
+
+    // L2-interface create and bind
+    // this needs to be delete'd before the flush below, since it too maintains
+    // references to the BD and Interface
+    l2_binding *l2itf = new l2_binding(vxt, bd1);
+    HW::item<bool> hw_l2_bind(true, rc_t::OK);
+
+    ADD_EXPECT(l2_binding::bind_cmd(hw_l2_bind, hw_vxt.data(), hw_bd.data(), false));
+    TRY_CHECK_RC(OM::write(franz, *l2itf));
+
+    // flush Franz's state
+    delete l2itf;
+    HW::item<handle_t> hw_vxtdel(3, rc_t::NOOP);
+    STRICT_ORDER_OFF();
+    ADD_EXPECT(l2_binding::unbind_cmd(hw_l2_bind, hw_vxt.data(), hw_bd.data(), false));
+    ADD_EXPECT(bridge_domain::delete_cmd(hw_bd));
+    ADD_EXPECT(vxlan_tunnel::delete_cmd(hw_vxtdel, ep));
+    TRY_CHECK(OM::remove(franz));
+}
+
+BOOST_AUTO_TEST_CASE(test_vlan) {
+    VppInit vi;
+    const std::string noam = "NoamChomsky";
+    rc_t rc = rc_t::OK;
+
+    std::string itf1_name = "host1";
+    interface itf1(itf1_name,
+                   interface::type_t::AFPACKET,
+                   interface::admin_state_t::UP);
+
+    HW::item<handle_t> hw_ifh(2, rc_t::OK);
+    ADD_EXPECT(interface::af_packet_create_cmd(hw_ifh, itf1_name));
+
+    HW::item<interface::admin_state_t> hw_as_up(interface::admin_state_t::UP, rc_t::OK);
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up, hw_ifh));
+
+    TRY_CHECK_RC(OM::write(noam, itf1));
+
+    sub_interface *vl33 = new sub_interface(itf1,
+                                            interface::admin_state_t::UP,
+                                            33);
+
+    HW::item<handle_t> hw_vl33(3, rc_t::OK);
+    ADD_EXPECT(sub_interface::create_cmd(hw_vl33, itf1_name+".33", hw_ifh.data(), 33));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up, hw_vl33));
+
+    TRY_CHECK_RC(OM::write(noam, *vl33));
+
+    delete vl33;
+    HW::item<interface::admin_state_t> hw_as_down(interface::admin_state_t::DOWN, rc_t::OK);
+    HW::item<handle_t> hw_vl33_down(3, rc_t::NOOP);
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_vl33));
+    ADD_EXPECT(sub_interface::delete_cmd(hw_vl33_down));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_ifh));
+    ADD_EXPECT(interface::af_packet_delete_cmd(hw_ifh, itf1_name));
+
+    TRY_CHECK(OM::remove(noam));
+}
+
+BOOST_AUTO_TEST_CASE(test_acl) {
+    VppInit vi;
+    const std::string fyodor = "FyodorDostoyevsky";
+    const std::string leo = "LeoTolstoy";
+    rc_t rc = rc_t::OK;
+
+    /*
+     * Fyodor adds an ACL in the input direction
+     */
+    std::string itf1_name = "host1";
+    interface itf1(itf1_name,
+                   interface::type_t::AFPACKET,
+                   interface::admin_state_t::UP);
+    HW::item<handle_t> hw_ifh(2, rc_t::OK);
+    HW::item<interface::admin_state_t> hw_as_up(interface::admin_state_t::UP, rc_t::OK);
+    ADD_EXPECT(interface::af_packet_create_cmd(hw_ifh, itf1_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up, hw_ifh));
+    TRY_CHECK_RC(OM::write(fyodor, itf1));
+
+    route::prefix_t src("10.10.10.10", 32);
+    ACL::l3_rule r1(10, ACL::action_t::PERMIT, src, route::prefix_t::ZERO);
+    ACL::l3_rule r2(20, ACL::action_t::DENY, route::prefix_t::ZERO, route::prefix_t::ZERO);
+
+    std::string acl_name = "acl1";
+    ACL::l3_list acl1(acl_name);
+    acl1.insert(r2);
+    acl1.insert(r1);
+    ACL::l3_list::rules_t rules = {r1, r2};
+
+    HW::item<handle_t> hw_acl(2, rc_t::OK);
+    ADD_EXPECT(ACL::l3_list::update_cmd(hw_acl, acl_name, rules));
+    TRY_CHECK_RC(OM::write(fyodor, acl1));
+
+    ACL::l3_binding *l3b = new ACL::l3_binding(direction_t::INPUT, itf1, acl1);
+    HW::item<bool> hw_binding(true, rc_t::OK);
+    ADD_EXPECT(ACL::l3_binding::bind_cmd(hw_binding, direction_t::INPUT,
+                                       hw_ifh.data(), hw_acl.data()));
+    TRY_CHECK_RC(OM::write(fyodor, *l3b));
+
+    /**
+     * Leo adds an L2 ACL in the output direction
+     */
+    TRY_CHECK_RC(OM::write(leo, itf1));
+
+    std::string l2_acl_name = "l2_acl1";
+    mac_address_t mac({0x0, 0x0, 0x1, 0x2, 0x3, 0x4});
+    mac_address_t mac_mask({0xff, 0xff, 0xff, 0x0, 0x0, 0x0});
+    ACL::l2_rule l2_r1(10, ACL::action_t::PERMIT, src, mac, mac_mask);
+    ACL::l2_rule l2_r2(20, ACL::action_t::DENY, src, {}, {});
+
+    ACL::l2_list l2_acl(l2_acl_name);
+    l2_acl.insert(l2_r2);
+    l2_acl.insert(l2_r1);
+
+    ACL::l2_list::rules_t l2_rules = {l2_r1, l2_r2};
+
+    HW::item<handle_t> l2_hw_acl(3, rc_t::OK);
+    ADD_EXPECT(ACL::l2_list::update_cmd(l2_hw_acl, l2_acl_name, l2_rules));
+    TRY_CHECK_RC(OM::write(leo, l2_acl));
+
+    ACL::l2_binding *l2b = new ACL::l2_binding(direction_t::OUTPUT, itf1, l2_acl);
+    HW::item<bool> l2_hw_binding(true, rc_t::OK);
+    ADD_EXPECT(ACL::l2_binding::bind_cmd(l2_hw_binding, direction_t::OUTPUT,
+                                       hw_ifh.data(), l2_hw_acl.data()));
+    TRY_CHECK_RC(OM::write(leo, *l2b));
+
+    delete l2b;
+    ADD_EXPECT(ACL::l2_binding::unbind_cmd(l2_hw_binding, direction_t::OUTPUT,
+                                         hw_ifh.data(), l2_hw_acl.data()));
+    ADD_EXPECT(ACL::l2_list::delete_cmd(l2_hw_acl));
+    TRY_CHECK(OM::remove(leo));
+
+    delete l3b;
+    HW::item<interface::admin_state_t> hw_as_down(interface::admin_state_t::DOWN,
+                                                  rc_t::OK);
+    STRICT_ORDER_OFF();
+    ADD_EXPECT(ACL::l3_binding::unbind_cmd(hw_binding, direction_t::INPUT,
+                                         hw_ifh.data(), hw_acl.data()));
+    ADD_EXPECT(ACL::l3_list::delete_cmd(hw_acl));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_ifh));
+    ADD_EXPECT(interface::af_packet_delete_cmd(hw_ifh, itf1_name));
+
+    TRY_CHECK(OM::remove(fyodor));
+}
+
+BOOST_AUTO_TEST_CASE(test_arp_proxy) {
+    VppInit vi;
+    const std::string kurt = "KurtVonnegut";
+    rc_t rc = rc_t::OK;
+
+    asio::ip::address_v4 low  = asio::ip::address_v4::from_string("10.0.0.0");
+    asio::ip::address_v4 high = asio::ip::address_v4::from_string("10.0.0.255");
+
+    arp_proxy_config ap(low, high);
+    HW::item<bool> hw_ap_cfg(true, rc_t::OK);
+    ADD_EXPECT(arp_proxy_config::config_cmd(hw_ap_cfg, low, high));
+    TRY_CHECK_RC(OM::write(kurt, ap));
+
+    std::string itf3_name = "host3";
+    interface itf3(itf3_name,
+                   interface::type_t::AFPACKET,
+                   interface::admin_state_t::UP);
+    HW::item<handle_t> hw_ifh(2, rc_t::OK);
+    HW::item<interface::admin_state_t> hw_as_up(interface::admin_state_t::UP, rc_t::OK);
+    ADD_EXPECT(interface::af_packet_create_cmd(hw_ifh, itf3_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up, hw_ifh));
+    TRY_CHECK_RC(OM::write(kurt, itf3));
+
+    arp_proxy_binding *apb = new arp_proxy_binding(itf3, ap);
+    HW::item<bool> hw_binding(true, rc_t::OK);
+    ADD_EXPECT(arp_proxy_binding::bind_cmd(hw_binding, hw_ifh.data()));
+    TRY_CHECK_RC(OM::write(kurt, *apb));
+
+    delete apb;
+
+    HW::item<interface::admin_state_t> hw_as_down(interface::admin_state_t::DOWN,
+                                                  rc_t::OK);
+    STRICT_ORDER_OFF();
+    ADD_EXPECT(arp_proxy_binding::unbind_cmd(hw_binding, hw_ifh.data()));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_ifh));
+    ADD_EXPECT(interface::af_packet_delete_cmd(hw_ifh, itf3_name));
+    ADD_EXPECT(arp_proxy_config::unconfig_cmd(hw_ap_cfg, low, high));
+
+    TRY_CHECK(OM::remove(kurt));
+}
+
+BOOST_AUTO_TEST_CASE(test_ip_unnumbered) {
+    VppInit vi;
+    const std::string eric = "EricAmbler";
+    rc_t rc = rc_t::OK;
+
+    /*
+     * Interface 1 has the L3 address
+     */
+    std::string itf1_name = "host1";
+    interface itf1(itf1_name,
+                   interface::type_t::AFPACKET,
+                   interface::admin_state_t::UP);
+    HW::item<handle_t> hw_ifh(2, rc_t::OK);
+    HW::item<interface::admin_state_t> hw_as_up(interface::admin_state_t::UP, rc_t::OK);
+    ADD_EXPECT(interface::af_packet_create_cmd(hw_ifh, itf1_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up, hw_ifh));
+    TRY_CHECK_RC(OM::write(eric, itf1));
+
+    route::prefix_t pfx_10("10.10.10.10", 24);
+    l3_binding *l3 = new l3_binding(itf1, pfx_10);
+    HW::item<bool> hw_l3_bind(true, rc_t::OK);
+    HW::item<bool> hw_l3_unbind(false, rc_t::OK);
+    ADD_EXPECT(l3_binding::bind_cmd(hw_l3_bind, hw_ifh.data(), pfx_10));
+    TRY_CHECK_RC(OM::write(eric, *l3));
+
+    /*
+     * Interface 2 is unnumbered
+     */
+    std::string itf2_name = "host2";
+    interface itf2(itf2_name,
+                   interface::type_t::AFPACKET,
+                   interface::admin_state_t::UP);
+
+    HW::item<handle_t> hw_ifh2(4, rc_t::OK);
+    ADD_EXPECT(interface::af_packet_create_cmd(hw_ifh2, itf2_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up, hw_ifh2));
+    TRY_CHECK_RC(OM::write(eric, itf2));
+
+    ip_unnumbered *ipun = new ip_unnumbered(itf2, itf1);
+    HW::item<bool> hw_ip_cfg(true, rc_t::OK);
+    HW::item<bool> hw_ip_uncfg(false, rc_t::OK);
+    ADD_EXPECT(ip_unnumbered::config_cmd(hw_ip_cfg, hw_ifh2.data(), hw_ifh.data()));
+    TRY_CHECK_RC(OM::write(eric, *ipun));
+
+    delete l3;
+    delete ipun;
+
+    HW::item<interface::admin_state_t> hw_as_down(interface::admin_state_t::DOWN, rc_t::OK);
+    STRICT_ORDER_OFF();
+    ADD_EXPECT(ip_unnumbered::unconfig_cmd(hw_ip_uncfg, hw_ifh2.data(), hw_ifh.data()));
+    ADD_EXPECT(l3_binding::unbind_cmd(hw_l3_unbind, hw_ifh.data(), pfx_10));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_ifh2));
+    ADD_EXPECT(interface::af_packet_delete_cmd(hw_ifh2, itf2_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_ifh));
+    ADD_EXPECT(interface::af_packet_delete_cmd(hw_ifh, itf1_name));
+
+    TRY_CHECK(OM::remove(eric));
+}
+
+BOOST_AUTO_TEST_CASE(test_ip6nd) {
+    VppInit vi;
+    const std::string paulo = "PauloCoelho";
+    rc_t rc = rc_t::OK;
+
+    /*
+     * ra config
+     */
+    std::string itf_name = "host_ip6nd";
+    interface itf(itf_name,
+                   interface::type_t::AFPACKET,
+                   interface::admin_state_t::UP);
+    HW::item<handle_t> hw_ifh(3, rc_t::OK);
+    HW::item<interface::admin_state_t> hw_as_up(interface::admin_state_t::UP, rc_t::OK);
+    ADD_EXPECT(interface::af_packet_create_cmd(hw_ifh, itf_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up, hw_ifh));
+    TRY_CHECK_RC(OM::write(paulo, itf));
+
+    route::prefix_t pfx_10("fd8f:69d8:c12c:ca62::3", 128);
+    l3_binding *l3 = new l3_binding(itf, pfx_10);
+    HW::item<bool> hw_l3_bind(true, rc_t::OK);
+    HW::item<bool> hw_l3_unbind(false, rc_t::OK);
+    ADD_EXPECT(l3_binding::bind_cmd(hw_l3_bind, hw_ifh.data(), pfx_10));
+    TRY_CHECK_RC(OM::write(paulo, *l3));
+
+    ra_config ra(0, 1, 0, 4);
+    ip6nd_ra_config *ip6ra = new ip6nd_ra_config(itf, ra);
+    HW::item<bool> hw_ip6nd_ra_config_config(true, rc_t::OK);
+    HW::item<bool> hw_ip6nd_ra_config_unconfig(false, rc_t::OK);
+    ADD_EXPECT(ip6nd_ra_config::config_cmd(hw_ip6nd_ra_config_config, hw_ifh.data(), ra));
+    TRY_CHECK_RC(OM::write(paulo, *ip6ra));
+
+    /*
+     * ra prefix
+     */
+    ra_prefix ra_pfx(pfx_10, 0, 0, 2592000, 604800);
+    ip6nd_ra_prefix *ip6pfx = new ip6nd_ra_prefix(itf, ra_pfx);
+    HW::item<bool> hw_ip6nd_ra_prefix_config(true, rc_t::OK);
+    HW::item<bool> hw_ip6nd_ra_prefix_unconfig(false, rc_t::OK);
+    ADD_EXPECT(ip6nd_ra_prefix::config_cmd(hw_ip6nd_ra_prefix_config, hw_ifh.data(), ra_pfx));
+    TRY_CHECK_RC(OM::write(paulo, *ip6pfx));
+
+    delete ip6pfx;
+
+    ADD_EXPECT(ip6nd_ra_prefix::unconfig_cmd(hw_ip6nd_ra_prefix_unconfig, hw_ifh.data(), ra_pfx));
+
+    delete ip6ra;
+    delete l3;
+
+    HW::item<interface::admin_state_t> hw_as_down(interface::admin_state_t::DOWN, rc_t::OK);
+
+    STRICT_ORDER_OFF();
+    ADD_EXPECT(ip6nd_ra_config::unconfig_cmd(hw_ip6nd_ra_config_unconfig, hw_ifh.data(), ra));
+    ADD_EXPECT(l3_binding::unbind_cmd(hw_l3_unbind, hw_ifh.data(), pfx_10));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_ifh));
+    ADD_EXPECT(interface::af_packet_delete_cmd(hw_ifh, itf_name));
+
+    TRY_CHECK(OM::remove(paulo));
+}
+
+BOOST_AUTO_TEST_CASE(test_interface_span) {
+    VppInit vi;
+    const std::string elif = "ElifShafak";
+    rc_t rc = rc_t::OK;
+
+    /*
+     * Interface 1 to be mirrored
+     */
+    std::string itf1_name = "port-from";
+    interface itf1(itf1_name,
+                   interface::type_t::AFPACKET,
+                   interface::admin_state_t::UP);
+    HW::item<handle_t> hw_ifh(2, rc_t::OK);
+    HW::item<interface::admin_state_t> hw_as_up(interface::admin_state_t::UP, rc_t::OK);
+    ADD_EXPECT(interface::af_packet_create_cmd(hw_ifh, itf1_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up, hw_ifh));
+    TRY_CHECK_RC(OM::write(elif, itf1));
+
+    /*
+     * Interface 2 where traffic is mirrored
+     */
+    std::string itf2_name = "port-to";
+    interface itf2(itf2_name,
+                   interface::type_t::AFPACKET,
+                   interface::admin_state_t::UP);
+
+    HW::item<handle_t> hw_ifh2(4, rc_t::OK);
+    HW::item<interface::admin_state_t> hw_as_up2(interface::admin_state_t::UP, rc_t::OK);
+
+    ADD_EXPECT(interface::af_packet_create_cmd(hw_ifh2, itf2_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up2, hw_ifh2));
+    TRY_CHECK_RC(OM::write(elif, itf2));
+
+    interface_span *itf_span = new interface_span(itf1, itf2, interface_span::state_t::TX_RX_ENABLED);
+    HW::item<bool> hw_is_cfg(true, rc_t::OK);
+    HW::item<bool> hw_is_uncfg(true, rc_t::OK);
+    ADD_EXPECT(interface_span::config_cmd(hw_is_cfg, hw_ifh.data(), hw_ifh2.data(), interface_span::state_t::TX_RX_ENABLED));
+    TRY_CHECK_RC(OM::write(elif, *itf_span));
+
+    HW::item<interface::admin_state_t> hw_as_down(interface::admin_state_t::DOWN, rc_t::OK);
+    HW::item<interface::admin_state_t> hw_as_down2(interface::admin_state_t::DOWN, rc_t::OK);
+
+    delete itf_span;
+    STRICT_ORDER_OFF();
+    ADD_EXPECT(interface_span::unconfig_cmd(hw_is_uncfg, hw_ifh.data(), hw_ifh2.data()));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_ifh));
+    ADD_EXPECT(interface::af_packet_delete_cmd(hw_ifh, itf1_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down2, hw_ifh2));
+    ADD_EXPECT(interface::af_packet_delete_cmd(hw_ifh2, itf2_name));
+
+    TRY_CHECK(OM::remove(elif));
+}
+
+BOOST_AUTO_TEST_CASE(test_routing) {
+    VppInit vi;
+    const std::string ian = "IanFleming";
+    rc_t rc = rc_t::OK;
+
+    /*
+     * non-default route domain
+     */
+    route_domain rd4(1);
+    HW::item<bool> hw_rd4_create(true, rc_t::OK);
+    HW::item<bool> hw_rd4_delete(false, rc_t::OK);
+    HW::item<bool> hw_rd6_create(true, rc_t::OK);
+    HW::item<bool> hw_rd6_delete(false, rc_t::OK);
+    HW::item<route::table_id_t> hw_rd4_bind(1, rc_t::OK);
+    HW::item<route::table_id_t> hw_rd4_unbind(route::DEFAULT_TABLE, rc_t::OK);
+    HW::item<route::table_id_t> hw_rd6_bind(1, rc_t::OK);
+    HW::item<route::table_id_t> hw_rd7_unbind(route::DEFAULT_TABLE, rc_t::OK);
+    ADD_EXPECT(route_domain::create_cmd(hw_rd4_create, l3_proto_t::IPV4, 1));
+    ADD_EXPECT(route_domain::create_cmd(hw_rd6_create, l3_proto_t::IPV6, 1));
+    TRY_CHECK_RC(OM::write(ian, rd4));
+
+    /*
+     * a couple of interfaces
+     */
+    std::string itf1_name = "af1";
+    interface itf1(itf1_name,
+                   interface::type_t::AFPACKET,
+                   interface::admin_state_t::UP);
+    HW::item<handle_t> hw_ifh(2, rc_t::OK);
+    HW::item<interface::admin_state_t> hw_as_up(interface::admin_state_t::UP, rc_t::OK);
+    HW::item<interface::admin_state_t> hw_as_down(interface::admin_state_t::DOWN, rc_t::OK);
+    ADD_EXPECT(interface::af_packet_create_cmd(hw_ifh, itf1_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up, hw_ifh));
+    TRY_CHECK_RC(OM::write(ian, itf1));
+
+    std::string itf2_name = "af2";
+    interface *itf2 = new interface(itf2_name,
+                                    interface::type_t::AFPACKET,
+                                    interface::admin_state_t::UP,
+                                    rd4);
+
+    HW::item<handle_t> hw_ifh2(4, rc_t::OK);
+    HW::item<interface::admin_state_t> hw_as_up2(interface::admin_state_t::UP, rc_t::OK);
+    HW::item<interface::admin_state_t> hw_as_down2(interface::admin_state_t::DOWN, rc_t::OK);
+    ADD_EXPECT(interface::af_packet_create_cmd(hw_ifh2, itf2_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up2, hw_ifh2));
+    ADD_EXPECT(interface::set_table_cmd(hw_rd4_bind, l3_proto_t::IPV4, hw_ifh2));
+    ADD_EXPECT(interface::set_table_cmd(hw_rd6_bind, l3_proto_t::IPV6, hw_ifh2));
+    TRY_CHECK_RC(OM::write(ian, *itf2));
+
+    /*
+     * prefix on each interface
+     */
+    route::prefix_t pfx_10("10.10.10.10", 24);
+    l3_binding *l3_10 = new l3_binding(itf1, pfx_10);
+    HW::item<bool> hw_l3_10_bind(true, rc_t::OK);
+    HW::item<bool> hw_l3_10_unbind(false, rc_t::OK);
+    ADD_EXPECT(l3_binding::bind_cmd(hw_l3_10_bind, hw_ifh.data(), pfx_10));
+    TRY_CHECK_RC(OM::write(ian, *l3_10));
+    route::prefix_t pfx_11("11.11.11.11", 24);
+    l3_binding *l3_11 = new l3_binding(*itf2, pfx_11);
+    HW::item<bool> hw_l3_11_bind(true, rc_t::OK);
+    HW::item<bool> hw_l3_11_unbind(false, rc_t::OK);
+    ADD_EXPECT(l3_binding::bind_cmd(hw_l3_11_bind, hw_ifh2.data(), pfx_11));
+    TRY_CHECK_RC(OM::write(ian, *l3_11));
+
+    /*
+     * A route via interface 1 in the default table
+     */
+    route::prefix_t pfx_5("5.5.5.5", 32);
+    boost::asio::ip::address nh_10 = boost::asio::ip::address::from_string("10.10.10.11");
+    route::path *path_10 = new route::path(nh_10, itf1);
+    route::ip_route *route_5 = new route::ip_route(pfx_5);
+    route_5->add(*path_10);
+    HW::item<bool> hw_route_5(true, rc_t::OK);
+    ADD_EXPECT(route::ip_route::update_cmd(hw_route_5, 0, pfx_5, {*path_10}));
+    TRY_CHECK_RC(OM::write(ian, *route_5));
+
+    /*
+     * A route via interface 2 in the non-default table
+     */
+    boost::asio::ip::address nh_11 = boost::asio::ip::address::from_string("11.11.11.10");
+    route::path *path_11 = new route::path(nh_11, *itf2);
+    route::ip_route *route_5_2 = new route::ip_route(rd4, pfx_5);
+    route_5_2->add(*path_11);
+    HW::item<bool> hw_route_5_2(true, rc_t::OK);
+    ADD_EXPECT(route::ip_route::update_cmd(hw_route_5_2, 1, pfx_5, {*path_11}));
+    TRY_CHECK_RC(OM::write(ian, *route_5_2));
+
+    /*
+     * An ARP entry for the neighbour on itf1
+     */
+    HW::item<bool> hw_neighbour(true, rc_t::OK);
+    mac_address_t mac_n({0,1,2,4,5,6});
+    neighbour *ne = new neighbour(itf1, mac_n, nh_10);
+    ADD_EXPECT(neighbour::create_cmd(hw_neighbour, hw_ifh.data(), mac_n, nh_10));
+    TRY_CHECK_RC(OM::write(ian, *ne));
+
+    /*
+     * A DVR route
+     */
+    route::prefix_t pfx_6("6.6.6.6", 32);
+    route::path *path_l2 = new route::path(*itf2, nh_proto_t::ETHERNET);
+    route::ip_route *route_dvr = new route::ip_route(pfx_6);
+    route_dvr->add(*path_l2);
+    HW::item<bool> hw_route_dvr(true, rc_t::OK);
+    ADD_EXPECT(route::ip_route::update_cmd(hw_route_dvr, 0, pfx_6, {*path_l2}));
+    TRY_CHECK_RC(OM::write(ian, *route_dvr));
+
+    STRICT_ORDER_OFF();
+    // delete the stack objects that hold references to others
+    // so the OM::remove is the call that removes the last reference
+    delete l3_11;
+    delete l3_10;
+    delete itf2;
+    delete route_5;
+    delete path_10;
+    delete route_5_2;
+    delete path_11;
+    delete route_dvr;
+    delete path_l2;
+    delete ne;
+    ADD_EXPECT(neighbour::delete_cmd(hw_neighbour, hw_ifh.data(), mac_n, nh_10));
+    ADD_EXPECT(route::ip_route::delete_cmd(hw_route_dvr, 0, pfx_6));
+    ADD_EXPECT(route::ip_route::delete_cmd(hw_route_5_2, 1, pfx_5));
+    ADD_EXPECT(route::ip_route::delete_cmd(hw_route_5, 0, pfx_5));
+    ADD_EXPECT(l3_binding::unbind_cmd(hw_l3_10_unbind, hw_ifh.data(), pfx_10));
+    ADD_EXPECT(l3_binding::unbind_cmd(hw_l3_11_unbind, hw_ifh2.data(), pfx_11));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_ifh));
+    ADD_EXPECT(interface::af_packet_delete_cmd(hw_ifh, itf1_name));
+    ADD_EXPECT(interface::set_table_cmd(hw_rd4_unbind, l3_proto_t::IPV4, hw_ifh2));
+    ADD_EXPECT(interface::set_table_cmd(hw_rd4_unbind, l3_proto_t::IPV6, hw_ifh2));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down2, hw_ifh2));
+    ADD_EXPECT(interface::af_packet_delete_cmd(hw_ifh2, itf2_name));
+    ADD_EXPECT(route_domain::delete_cmd(hw_rd4_delete, l3_proto_t::IPV4, 1));
+    ADD_EXPECT(route_domain::delete_cmd(hw_rd6_delete, l3_proto_t::IPV6, 1));
+
+    TRY_CHECK(OM::remove(ian));
+}
+
+BOOST_AUTO_TEST_CASE(test_nat) {
+    VppInit vi;
+    const std::string gs = "GeorgeSimenon";
+    rc_t rc = rc_t::OK;
+
+    /*
+     * Inside Interface
+     */
+    std::string itf_in_name = "inside";
+    interface itf_in(itf_in_name,
+                     interface::type_t::AFPACKET,
+                     interface::admin_state_t::UP);
+    HW::item<handle_t> hw_ifh(2, rc_t::OK);
+    HW::item<interface::admin_state_t> hw_as_up(interface::admin_state_t::UP, rc_t::OK);
+    HW::item<interface::admin_state_t> hw_as_down(interface::admin_state_t::DOWN, rc_t::OK);
+    ADD_EXPECT(interface::af_packet_create_cmd(hw_ifh, itf_in_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up, hw_ifh));
+    TRY_CHECK_RC(OM::write(gs, itf_in));
+
+    /*
+     * outside
+     */
+    std::string itf_out_name = "port-to";
+    interface itf_out(itf_out_name,
+                   interface::type_t::AFPACKET,
+                   interface::admin_state_t::UP);
+
+    HW::item<handle_t> hw_ifh2(4, rc_t::OK);
+    HW::item<interface::admin_state_t> hw_as_up2(interface::admin_state_t::UP, rc_t::OK);
+    HW::item<interface::admin_state_t> hw_as_down2(interface::admin_state_t::DOWN, rc_t::OK);
+
+    ADD_EXPECT(interface::af_packet_create_cmd(hw_ifh2, itf_out_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_up2, hw_ifh2));
+    TRY_CHECK_RC(OM::write(gs, itf_out));
+
+    /*
+     * A NAT static mapping
+     */
+    boost::asio::ip::address in_addr = boost::asio::ip::address::from_string("10.0.0.1");
+    boost::asio::ip::address_v4 out_addr = boost::asio::ip::address_v4::from_string("1.1.1.1");
+
+    nat_static ns(in_addr, out_addr);
+    HW::item<bool> hw_ns(true, rc_t::OK);
+
+    ADD_EXPECT(nat_static::create_44_cmd(hw_ns, 0, in_addr.to_v4(), out_addr));
+    TRY_CHECK_RC(OM::write(gs, ns));
+
+    /*
+     * bind nat inside and out
+     */
+    nat_binding *nb_in = new nat_binding(itf_in,
+                                         direction_t::INPUT,
+                                         l3_proto_t::IPV4,
+                                         nat_binding::zone_t::INSIDE);
+    HW::item<bool> hw_nb_in(true, rc_t::OK);
+
+    ADD_EXPECT(nat_binding::bind_44_input_cmd(hw_nb_in, hw_ifh.data().value(),
+                                              nat_binding::zone_t::INSIDE));
+    TRY_CHECK_RC(OM::write(gs, *nb_in));
+
+    nat_binding *nb_out = new nat_binding(itf_out,
+                                          direction_t::INPUT,
+                                          l3_proto_t::IPV4,
+                                          nat_binding::zone_t::OUTSIDE);
+    HW::item<bool> hw_nb_out(true, rc_t::OK);
+
+    ADD_EXPECT(nat_binding::bind_44_input_cmd(hw_nb_out, hw_ifh2.data().value(),
+                                              nat_binding::zone_t::OUTSIDE));
+    TRY_CHECK_RC(OM::write(gs, *nb_out));
+
+
+    STRICT_ORDER_OFF();
+    delete nb_in;
+    delete nb_out;
+    ADD_EXPECT(nat_binding::unbind_44_input_cmd(hw_nb_in, hw_ifh.data().value(),
+                                                nat_binding::zone_t::INSIDE));
+    ADD_EXPECT(nat_binding::unbind_44_input_cmd(hw_nb_out, hw_ifh2.data().value(),
+                                                nat_binding::zone_t::OUTSIDE));
+    ADD_EXPECT(nat_static::delete_44_cmd(hw_ns, 0, in_addr.to_v4(), out_addr));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down, hw_ifh));
+    ADD_EXPECT(interface::af_packet_delete_cmd(hw_ifh, itf_in_name));
+    ADD_EXPECT(interface::state_change_cmd(hw_as_down2, hw_ifh2));
+    ADD_EXPECT(interface::af_packet_delete_cmd(hw_ifh2, itf_out_name));
+
+    TRY_CHECK(OM::remove(gs));
+}
+
+BOOST_AUTO_TEST_CASE(test_interface_events) {
+    VppInit vi;
+    MockListener ml;
+
+    HW::item<bool> hw_want(true, rc_t::OK);
+
+    ADD_EXPECT(interface::events_cmd(ml));
+    cmd* itf = new interface::events_cmd(ml);
+
+    HW::enqueue(itf);
+    HW::write();
+
+    HW::dequeue(itf);
+}
+
+BOOST_AUTO_TEST_SUITE_END()