acl: The ACL plugin.

This is the commit from the accumulated work in the github ACL branch,
to move it to gerrit.

Change-Id: I85a6b0df0d3dd3c3c7588e92a1e22c553e4b6ef7
Signed-off-by: Andrew Yourtchenko <ayourtch@gmail.com>

20 files changed, 5664 insertions, 0 deletions

diff --git a/plugins/Makefile.am b/plugins/Makefile.am
index 117f11dddc4..100f089e0fe 100644
--- a/plugins/Makefile.am
+++ b/plugins/Makefile.am
@@ -55,3 +55,7 @@ endif
 if ENABLE_flowperpkt_PLUGIN
 SUBDIRS += flowperpkt-plugin
 endif
+
+if ENABLE_acl_PLUGIN
+SUBDIRS += acl-plugin
+endif
diff --git a/plugins/acl-plugin/Makefile.am b/plugins/acl-plugin/Makefile.am
new file mode 100644
index 00000000000..623c192c9cd
--- /dev/null
+++ b/plugins/acl-plugin/Makefile.am
@@ -0,0 +1,59 @@
+# Copyright (c) 2016 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.
+
+AUTOMAKE_OPTIONS = foreign subdir-objects
+
+AM_CFLAGS = -Wall
+AM_LDFLAGS = -module -shared -avoid-version
+
+vppapitestpluginsdir = ${libdir}/vpp_api_test_plugins
+vpppluginsdir = ${libdir}/vpp_plugins
+
+vppapitestplugins_LTLIBRARIES = acl_test_plugin.la
+vppplugins_LTLIBRARIES = acl_plugin.la
+
+acl_plugin_la_SOURCES =				\
+	acl/acl.c				\
+	acl/node_in.c				\
+	acl/node_out.c				\
+	acl/l2sess.c				\
+	acl/l2sess_node.c			\
+	acl/l2sess.h				\
+	acl/acl_plugin.api.h
+
+BUILT_SOURCES = acl/acl.api.h
+
+SUFFIXES = .api.h .api
+
+#
+# ACL API
+#
+%.api.h: %.api
+	mkdir -p $(dir $@) ; \
+	$(CC) $(CPPFLAGS) -E -P -C -x c $^ \
+	| vppapigen --input - --output $@ --show-name $@
+
+apidir = $(prefix)/acl
+api_DATA = acl/acl.api
+
+noinst_HEADERS =				\
+  acl/acl_all_api_h.h				\
+  acl/acl_msg_enum.h				\
+  acl/acl.api.h
+
+acl_test_plugin_la_SOURCES = acl/acl_test.c acl/acl_plugin.api.h
+
+# Remove *.la files
+install-data-hook:
+	@(cd $(vpppluginsdir) && $(RM) $(vppplugins_LTLIBRARIES))
+	@(cd $(vppapitestpluginsdir) && $(RM) $(vppapitestplugins_LTLIBRARIES))
diff --git a/plugins/acl-plugin/acl/acl.api b/plugins/acl-plugin/acl/acl.api
new file mode 100644
index 00000000000..58a5a17180e
--- /dev/null
+++ b/plugins/acl-plugin/acl/acl.api
@@ -0,0 +1,444 @@
+/* Hey Emacs use -*- mode: C -*- */
+/*
+ * Copyright (c) 2016 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.
+ */
+
+/** \file
+    This file defines the vpp control-plane API messages
+    used to control the ACL plugin
+*/
+
+
+/** \brief Get the plugin version
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+*/
+
+define acl_plugin_get_version
+{
+  u32 client_index;
+  u32 context;
+};
+
+/** \brief Reply to get the plugin version
+    @param context - returned sender context, to match reply w/ request
+    @param major - Incremented every time a known breaking behavior change is introduced
+    @param minor - Incremented with small changes, may be used to avoid buggy versions
+*/
+
+define acl_plugin_get_version_reply
+{
+  u32 context;
+  u32 major;
+  u32 minor;
+};
+
+/** \brief Access List Rule entry
+    @param is_permit - deny (0), permit (1), or permit+reflect(2) action on this rule.
+    @param is_ipv6   - IP addresses in this rule are IPv6 (1) or IPv4 (0)
+    @param src_ip_addr - Source prefix value
+    @param src_ip_prefix_len - Source prefix length
+    @param dst_ip_addr - Destination prefix value
+    @param dst_ip_prefix_len - Destination prefix length
+    @param proto - L4 protocol (http://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml)
+    @param srcport_or_icmptype_first - beginning of source port or ICMP4/6 type range
+    @param srcport_or_icmptype_last - end of source port or ICMP4/6 type range
+    @param dstport_or_icmpcode_first - beginning of destination port or ICMP4/6 code range
+    @param dstport_or_icmpcode_last - end of destination port or ICMP4/6 code range
+    @param tcp_flags_mask - if proto==6, match masked TCP flags with this value
+    @param tcp_flags_value - if proto==6, mask to AND the TCP flags in the packet with
+*/
+
+typeonly manual_print manual_endian define acl_rule
+{
+  u8 is_permit;
+  u8 is_ipv6;
+  u8 src_ip_addr[16];
+  u8 src_ip_prefix_len;
+  u8 dst_ip_addr[16];
+  u8 dst_ip_prefix_len;
+/*
+ * L4 protocol. IANA number. 1 = ICMP, 58 = ICMPv6, 6 = TCP, 17 = UDP.
+ * 0 => ignore L4 and ignore the ports/tcpflags when matching.
+ */
+  u8 proto;
+/*
+ * If the L4 protocol is TCP or UDP, the below
+ * hold ranges of ports, else if the L4 is ICMP/ICMPv6
+ * they hold ranges of ICMP(v6) types/codes.
+ *
+ * Ranges are inclusive, i.e. to match "any" TCP/UDP port,
+ * use first=0,last=65535. For ICMP(v6),
+ * use first=0,last=255.
+ */
+  u16 srcport_or_icmptype_first;
+  u16 srcport_or_icmptype_last;
+  u16 dstport_or_icmpcode_first;
+  u16 dstport_or_icmpcode_last;
+/*
+ * for proto = 6, this matches if the
+ * TCP flags in the packet, ANDed with tcp_flags_mask,
+ * is equal to tcp_flags_value.
+ */
+  u8 tcp_flags_mask;
+  u8 tcp_flags_value;
+};
+
+/** \brief MACIP Access List Rule entry
+    @param is_permit - deny (0), permit (1) action on this rule.
+    @param is_ipv6   - IP addresses in this rule are IPv6 (1) or IPv4 (0)
+    @param src_mac - match masked source MAC address against this value
+    @param src_mac_mask - AND source MAC address with this value before matching
+    @param src_ip_addr - Source prefix value
+    @param src_ip_prefix_len - Source prefix length
+*/
+
+typeonly manual_print manual_endian define macip_acl_rule
+{
+  u8 is_permit;
+  u8 is_ipv6;
+/*
+ * The source mac of the packet ANDed with src_mac_mask.
+ * The source ip[46] address in the packet is matched
+ * against src_ip_addr, with src_ip_prefix_len set to 0.
+ *
+ * For better performance, minimize the number of
+ * (src_mac_mask, src_ip_prefix_len) combinations
+ * in a MACIP ACL.
+ */
+  u8 src_mac[6];
+  u8 src_mac_mask[6];
+  u8 src_ip_addr[16];
+  u8 src_ip_prefix_len;
+};
+
+/** \brief Replace an existing ACL in-place or create a new ACL
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param acl_index - an existing ACL entry (0..0xfffffffe) to replace, or 0xffffffff to make new ACL
+    @param tag - a string value stored along with the ACL, for descriptive purposes
+    @param count - number of ACL rules
+    @r - Rules for this access-list
+*/
+
+manual_print manual_endian define acl_add_replace
+{
+  u32 client_index;
+  u32 context;
+  u32 acl_index; /* ~0 to add, existing ACL# to replace */
+  u8 tag[64]; /* What gets in here gets out in the corresponding tag field when dumping the ACLs. */
+  u32 count;
+  vl_api_acl_rule_t r[count];
+};
+
+/** \brief Reply to add/replace ACL
+    @param context - returned sender context, to match reply w/ request
+    @param acl_index - index of the updated or newly created ACL
+    @param retval 0 - no error
+*/
+
+define acl_add_replace_reply
+{
+  u32 context;
+  u32 acl_index;
+  i32 retval;
+};
+
+/** \brief Delete an ACL
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param acl_index - ACL index to delete
+*/
+
+define acl_del
+{
+  u32 client_index;
+  u32 context;
+  u32 acl_index;
+};
+
+/** \brief Reply to delete the ACL
+    @param context - returned sender context, to match reply w/ request
+    @param retval 0 - no error
+*/
+
+define acl_del_reply
+{
+  u32 context;
+  i32 retval;
+};
+
+/* acl_interface_add_del(_reply) to be deprecated in lieu of acl_interface_set_acl_list */
+/** \brief Use acl_interface_set_acl_list instead
+    Append/remove an ACL index to/from the list of ACLs checked for an interface
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param is_add - add or delete the ACL index from the list
+    @param is_input - check the ACL on input (1) or output (0)
+    @param sw_if_index - the interface to alter the list of ACLs on
+    @param acl_index - index of ACL for the operation
+*/
+
+define acl_interface_add_del
+{
+  u32 client_index;
+  u32 context;
+  u8 is_add;
+/*
+ * is_input = 0 => ACL applied on interface egress
+ * is_input = 1 => ACL applied on interface ingress
+ */
+  u8 is_input;
+  u32 sw_if_index;
+  u32 acl_index;
+};
+
+/** \brief Reply to alter the ACL list
+    @param context - returned sender context, to match reply w/ request
+    @param retval 0 - no error
+*/
+
+define acl_interface_add_del_reply
+{
+  u32 context;
+  i32 retval;
+};
+
+/** \brief Set the vector of input/output ACLs checked for an interface
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param sw_if_index - the interface to alter the list of ACLs on
+    @param count - total number of ACL indices in the vector
+    @param n_input - this many first elements correspond to input ACLs, the rest - output
+    @param acls - vector of ACL indices
+*/
+
+manual_endian define acl_interface_set_acl_list
+{
+  u32 client_index;
+  u32 context;
+  u32 sw_if_index;
+  u8 count;
+  u8 n_input; /* First n_input ACLs are set as a list of input ACLs, the rest are applied as output */
+  u32 acls[count];
+};
+
+/** \brief Reply to set the ACL list on an interface
+    @param context - returned sender context, to match reply w/ request
+    @param retval 0 - no error
+*/
+
+define acl_interface_set_acl_list_reply
+{
+  u32 context;
+  i32 retval;
+};
+
+/** \brief Dump the specific ACL contents or all of the ACLs' contents
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param acl_index - ACL index to dump, ~0 to dump all ACLs
+*/
+
+define acl_dump
+{
+  u32 client_index;
+  u32 context;
+  u32 acl_index; /* ~0 for all ACLs */
+};
+
+/** \brief Details about a single ACL contents
+    @param context - returned sender context, to match reply w/ request
+    @param acl_index - ACL index whose contents are being sent in this message
+    @param tag - Descriptive tag value which was supplied at ACL creation
+    @param count - Number of rules in this ACL
+    @param r - Array of rules within this ACL
+*/
+
+manual_print manual_endian define acl_details
+{
+  u32 context;
+  u32 acl_index;
+  u8 tag[64]; /* Same blob that was supplied to us when creating the ACL, one hopes. */
+  u32 count;
+  vl_api_acl_rule_t r[count];
+};
+
+/** \brief Dump the list(s) of ACL applied to specific or all interfaces
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param sw_if_index - interface to dump the ACL list for
+*/
+
+define acl_interface_list_dump
+{
+  u32 client_index;
+  u32 context;
+  u32 sw_if_index; /* ~0 for all interfaces */
+};
+
+/** \brief Details about a single ACL contents
+    @param context - returned sender context, to match reply w/ request
+    @param sw_if_index - interface for which the list of ACLs is applied
+    @param count - total length of acl indices vector
+    @param n_input - this many of indices in the beginning are input ACLs, the rest - output
+    @param acls - the vector of ACL indices
+*/
+
+manual_endian define acl_interface_list_details
+{
+  u32 context;
+  u32 sw_if_index;
+  u8 count;
+  u8 n_input;
+  u32 acls[count];
+};
+
+/** \brief Add a MACIP ACL
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param tag - descriptive value for this MACIP ACL
+    @param count - number of rules in this ACL
+    @param r - vector of MACIP ACL rules
+*/
+
+manual_print manual_endian define macip_acl_add
+{
+  u32 client_index;
+  u32 context;
+  u8 tag[64];
+  u32 count;
+  vl_api_macip_acl_rule_t r[count];
+};
+
+/** \brief Reply to add MACIP ACL
+    @param context - returned sender context, to match reply w/ request
+    @param acl_index - index of the newly created ACL
+    @param retval 0 - no error
+*/
+
+define macip_acl_add_reply
+{
+  u32 context;
+  u32 acl_index;
+  i32 retval;
+};
+
+/** \brief Delete a MACIP ACL
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param acl_index - MACIP ACL index to delete
+*/
+
+define macip_acl_del
+{
+  u32 client_index;
+  u32 context;
+  u32 acl_index;
+};
+
+/** \brief Reply to delete the MACIP ACL
+    @param context - returned sender context, to match reply w/ request
+    @param retval 0 - no error
+*/
+
+define macip_acl_del_reply
+{
+  u32 context;
+  i32 retval;
+};
+
+/** \brief Add or delete a MACIP ACL to/from interface
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param is_add - add (1) or delete (0) ACL from being used on an interface
+    @param sw_if_index - interface to apply the action to
+    @param acl_index - MACIP ACL index
+*/
+
+define macip_acl_interface_add_del
+{
+  u32 client_index;
+  u32 context;
+  u8 is_add;
+  /* macip ACLs are always input */
+  u32 sw_if_index;
+  u32 acl_index;
+};
+
+/** \brief Reply to apply/unapply  the MACIP ACL
+    @param context - returned sender context, to match reply w/ request
+    @param retval 0 - no error
+*/
+
+define macip_acl_interface_add_del_reply
+{
+  u32 context;
+  i32 retval;
+};
+
+/** \brief Dump one or all defined MACIP ACLs
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param acl_index - MACIP ACL index or ~0 to dump all ACLs
+*/
+
+define macip_acl_dump
+{
+  u32 client_index;
+  u32 context;
+  u32 acl_index; /* ~0 for all ACLs */
+};
+
+/** \brief Details about one MACIP ACL
+    @param context - returned sender context, to match reply w/ request
+    @param acl_index - index of this MACIP ACL
+    @param tag - descriptive tag which was supplied during the creation
+    @param count - length of the vector of MACIP ACL rules
+    @param r - rules comprising this ACL
+*/
+
+manual_print manual_endian define macip_acl_details
+{
+  u32 context;
+  u32 acl_index;
+  u8 tag[64];
+  u32 count;
+  vl_api_macip_acl_rule_t r[count];
+};
+
+/** \brief Get the vector of MACIP ACL IDs applied to the interfaces
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+*/
+
+define macip_acl_interface_get
+{
+  u32 client_index;
+  u32 context;
+};
+
+/** \brief Reply with the vector of MACIP ACLs by sw_if_index
+    @param context - returned sender context, to match reply w/ request
+    @param count - total number of elements in the vector
+    @param acls - the vector of active MACACL indices per sw_if_index
+*/
+
+define macip_acl_interface_get_reply
+{
+  u32 context;
+  u32 count;
+  u32 acls[count];
+};
+
diff --git a/plugins/acl-plugin/acl/acl.c b/plugins/acl-plugin/acl/acl.c
new file mode 100644
index 00000000000..149f006d46c
--- /dev/null
+++ b/plugins/acl-plugin/acl/acl.c
@@ -0,0 +1,1881 @@
+/*
+ * Copyright (c) 2016 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 <vnet/vnet.h>
+#include <vnet/plugin/plugin.h>
+#include <acl/acl.h>
+#include <acl/l2sess.h>
+
+#include <vnet/l2/l2_classify.h>
+#include <vnet/classify/input_acl.h>
+
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vlibsocket/api.h>
+
+/* define message IDs */
+#include <acl/acl_msg_enum.h>
+
+/* define message structures */
+#define vl_typedefs
+#include <acl/acl_all_api_h.h>
+#undef vl_typedefs
+
+/* define generated endian-swappers */
+#define vl_endianfun
+#include <acl/acl_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+#define vl_printfun
+#include <acl/acl_all_api_h.h>
+#undef vl_printfun
+
+/* Get the API version number */
+#define vl_api_version(n,v) static u32 api_version=(v);
+#include <acl/acl_all_api_h.h>
+#undef vl_api_version
+
+#include "node_in.h"
+#include "node_out.h"
+
+acl_main_t acl_main;
+
+/*
+ * A handy macro to set up a message reply.
+ * Assumes that the following variables are available:
+ * mp - pointer to request message
+ * rmp - pointer to reply message type
+ * rv - return value
+ */
+
+#define REPLY_MACRO(t)                                          \
+do {                                                            \
+    unix_shared_memory_queue_t * q =                            \
+    vl_api_client_index_to_input_queue (mp->client_index);      \
+    if (!q)                                                     \
+        return;                                                 \
+                                                                \
+    rmp = vl_msg_api_alloc (sizeof (*rmp));                     \
+    rmp->_vl_msg_id = ntohs((t)+sm->msg_id_base);               \
+    rmp->context = mp->context;                                 \
+    rmp->retval = ntohl(rv);                                    \
+                                                                \
+    vl_msg_api_send_shmem (q, (u8 *)&rmp);                      \
+} while(0);
+
+#define REPLY_MACRO2(t, body)                                   \
+do {                                                            \
+    unix_shared_memory_queue_t * q;                             \
+    rv = vl_msg_api_pd_handler (mp, rv);                        \
+    q = vl_api_client_index_to_input_queue (mp->client_index);  \
+    if (!q)                                                     \
+        return;                                                 \
+                                                                \
+    rmp = vl_msg_api_alloc (sizeof (*rmp));                     \
+    rmp->_vl_msg_id = ntohs((t)+am->msg_id_base);                               \
+    rmp->context = mp->context;                                 \
+    rmp->retval = ntohl(rv);                                    \
+    do {body;} while (0);                                       \
+    vl_msg_api_send_shmem (q, (u8 *)&rmp);                      \
+} while(0);
+
+#define REPLY_MACRO3(t, n, body)                                \
+do {                                                            \
+    unix_shared_memory_queue_t * q;                             \
+    rv = vl_msg_api_pd_handler (mp, rv);                        \
+    q = vl_api_client_index_to_input_queue (mp->client_index);  \
+    if (!q)                                                     \
+        return;                                                 \
+                                                                \
+    rmp = vl_msg_api_alloc (sizeof (*rmp) + n);                 \
+    rmp->_vl_msg_id = ntohs((t)+am->msg_id_base);                               \
+    rmp->context = mp->context;                                 \
+    rmp->retval = ntohl(rv);                                    \
+    do {body;} while (0);                                       \
+    vl_msg_api_send_shmem (q, (u8 *)&rmp);                      \
+} while(0);
+
+#define VALIDATE_SW_IF_INDEX(mp)                                \
+ do { u32 __sw_if_index = ntohl(mp->sw_if_index);               \
+    vnet_main_t *__vnm = vnet_get_main();                       \
+    if (pool_is_free_index(__vnm->interface_main.sw_interfaces, \
+                           __sw_if_index)) {                    \
+        rv = VNET_API_ERROR_INVALID_SW_IF_INDEX;                \
+        goto bad_sw_if_index;                                   \
+    }                                                           \
+} while(0);
+
+#define BAD_SW_IF_INDEX_LABEL                   \
+do {                                            \
+bad_sw_if_index:                                \
+    ;                                           \
+} while (0);
+
+
+
+/* List of message types that this plugin understands */
+
+#define foreach_acl_plugin_api_msg		\
+_(ACL_PLUGIN_GET_VERSION, acl_plugin_get_version) \
+_(ACL_ADD_REPLACE, acl_add_replace)				\
+_(ACL_DEL, acl_del)				\
+_(ACL_INTERFACE_ADD_DEL, acl_interface_add_del)	\
+_(ACL_INTERFACE_SET_ACL_LIST, acl_interface_set_acl_list)	\
+_(ACL_DUMP, acl_dump)  \
+_(ACL_INTERFACE_LIST_DUMP, acl_interface_list_dump) \
+_(MACIP_ACL_ADD, macip_acl_add) \
+_(MACIP_ACL_DEL, macip_acl_del) \
+_(MACIP_ACL_INTERFACE_ADD_DEL, macip_acl_interface_add_del) \
+_(MACIP_ACL_DUMP, macip_acl_dump) \
+_(MACIP_ACL_INTERFACE_GET, macip_acl_interface_get)
+
+/*
+ * This routine exists to convince the vlib plugin framework that
+ * we haven't accidentally copied a random .dll into the plugin directory.
+ *
+ * Also collects global variable pointers passed from the vpp engine
+ */
+
+clib_error_t *
+vlib_plugin_register (vlib_main_t * vm, vnet_plugin_handoff_t * h,
+		      int from_early_init)
+{
+  acl_main_t *am = &acl_main;
+  clib_error_t *error = 0;
+
+  am->vlib_main = vm;
+  am->vnet_main = h->vnet_main;
+  am->ethernet_main = h->ethernet_main;
+
+  l2sess_vlib_plugin_register(vm, h, from_early_init);
+
+  return error;
+}
+
+
+static void
+vl_api_acl_plugin_get_version_t_handler (vl_api_acl_plugin_get_version_t * mp)
+{
+  acl_main_t *am = &acl_main;
+  vl_api_acl_plugin_get_version_reply_t *rmp;
+  int msg_size = sizeof (*rmp);
+  unix_shared_memory_queue_t *q;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    {
+      return;
+    }
+
+  rmp = vl_msg_api_alloc (msg_size);
+  memset (rmp, 0, msg_size);
+  rmp->_vl_msg_id =
+    ntohs (VL_API_ACL_PLUGIN_GET_VERSION_REPLY + am->msg_id_base);
+  rmp->context = mp->context;
+  rmp->major = htonl (ACL_PLUGIN_VERSION_MAJOR);
+  rmp->minor = htonl (ACL_PLUGIN_VERSION_MINOR);
+
+  vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+
+static int
+acl_add_list (u32 count, vl_api_acl_rule_t rules[],
+	      u32 * acl_list_index, u8 * tag)
+{
+  acl_main_t *am = &acl_main;
+  acl_list_t *a;
+  acl_rule_t *r;
+  acl_rule_t *acl_new_rules;
+  int i;
+
+  if (*acl_list_index != ~0)
+    {
+      /* They supplied some number, let's see if this ACL exists */
+      if (pool_is_free_index (am->acls, *acl_list_index))
+	{
+	  /* tried to replace a non-existent ACL, no point doing anything */
+	  return -1;
+	}
+    }
+
+  /* Create and populate the rules */
+  acl_new_rules = clib_mem_alloc_aligned (sizeof (acl_rule_t) * count,
+					  CLIB_CACHE_LINE_BYTES);
+  if (!acl_new_rules)
+    {
+      /* Could not allocate rules. New or existing ACL - bail out regardless */
+      return -1;
+    }
+
+  for (i = 0; i < count; i++)
+    {
+      r = &acl_new_rules[i];
+      r->is_permit = rules[i].is_permit;
+      r->is_ipv6 = rules[i].is_ipv6;
+      if (r->is_ipv6)
+        {
+          memcpy (&r->src, rules[i].src_ip_addr, sizeof (r->src));
+          memcpy (&r->dst, rules[i].dst_ip_addr, sizeof (r->dst));
+        }
+      else
+        {
+          memcpy (&r->src.ip4, rules[i].src_ip_addr, sizeof (r->src.ip4));
+          memcpy (&r->dst.ip4, rules[i].dst_ip_addr, sizeof (r->dst.ip4));
+        }
+      r->src_prefixlen = rules[i].src_ip_prefix_len;
+      r->dst_prefixlen = rules[i].dst_ip_prefix_len;
+      r->proto = rules[i].proto;
+      r->src_port_or_type_first = rules[i].srcport_or_icmptype_first;
+      r->src_port_or_type_last = rules[i].srcport_or_icmptype_last;
+      r->dst_port_or_code_first = rules[i].dstport_or_icmpcode_first;
+      r->dst_port_or_code_last = rules[i].dstport_or_icmpcode_last;
+      r->tcp_flags_value = rules[i].tcp_flags_value;
+      r->tcp_flags_mask = rules[i].tcp_flags_mask;
+    }
+
+  if (~0 == *acl_list_index)
+    {
+      /* Get ACL index */
+      pool_get_aligned (am->acls, a, CLIB_CACHE_LINE_BYTES);
+      memset (a, 0, sizeof (*a));
+      /* Will return the newly allocated ACL index */
+      *acl_list_index = a - am->acls;
+    }
+  else
+    {
+      a = am->acls + *acl_list_index;
+      /* Get rid of the old rules */
+      clib_mem_free (a->rules);
+    }
+  a->rules = acl_new_rules;
+  a->count = count;
+  memcpy (a->tag, tag, sizeof (a->tag));
+
+  return 0;
+}
+
+static int
+acl_del_list (u32 acl_list_index)
+{
+  acl_main_t *am = &acl_main;
+  acl_list_t *a;
+  int i, ii;
+  if (pool_is_free_index (am->acls, acl_list_index))
+    {
+      return -1;
+    }
+
+  /* delete any references to the ACL */
+  for (i = 0; i < vec_len (am->output_acl_vec_by_sw_if_index); i++)
+    {
+      for (ii = 0; ii < vec_len (am->output_acl_vec_by_sw_if_index[i]);
+	   /* see body */ )
+	{
+	  if (acl_list_index == am->output_acl_vec_by_sw_if_index[i][ii])
+	    {
+	      vec_del1 (am->output_acl_vec_by_sw_if_index[i], ii);
+	    }
+	  else
+	    {
+	      ii++;
+	    }
+	}
+    }
+  for (i = 0; i < vec_len (am->input_acl_vec_by_sw_if_index); i++)
+    {
+      for (ii = 0; ii < vec_len (am->input_acl_vec_by_sw_if_index[i]);
+	   /* see body */ )
+	{
+	  if (acl_list_index == am->input_acl_vec_by_sw_if_index[i][ii])
+	    {
+	      vec_del1 (am->input_acl_vec_by_sw_if_index[i], ii);
+	    }
+	  else
+	    {
+	      ii++;
+	    }
+	}
+    }
+
+  /* now we can delete the ACL itself */
+  a = &am->acls[acl_list_index];
+  if (a->rules)
+    {
+      clib_mem_free (a->rules);
+    }
+  pool_put (am->acls, a);
+  return 0;
+}
+
+/* Some aids in ASCII graphing the content */
+#define XX "\377"
+#define __ "\000"
+#define _(x)
+#define v
+
+u8 ip4_5tuple_mask[] =
+_("             dmac               smac            etype ")
+_(ether) __ __ __ __ __ __ v __ __ __ __ __ __ v __ __ v
+  _("        v ihl totlen   ")
+  _(0x0000)
+  __ __ __ __
+  _("        ident fl+fo    ")
+  _(0x0004)
+  __ __ __ __
+  _("       ttl pr checksum ")
+  _(0x0008)
+  __ XX __ __
+  _("        src address    ")
+  _(0x000C)
+  XX XX XX XX
+  _("        dst address    ")
+  _(0x0010)
+  XX XX XX XX
+  _("L4 T/U  sport dport    ")
+  _(tcpudp)
+  XX XX XX XX
+  _(padpad)
+  __ __ __ __
+  _(padpad)
+  __ __ __ __
+  _(padeth)
+  __ __;
+
+     u8 ip6_5tuple_mask[] =
+       _("             dmac               smac            etype ")
+  _(ether) __ __ __ __ __ __ v __ __ __ __ __ __ v __ __ v
+  _("        v  tc + flow ")
+  _(0x0000) __ __ __ __
+  _("        plen  nh hl  ")
+  _(0x0004) __ __ XX __
+  _("        src address  ")
+  _(0x0008) XX XX XX XX
+  _(0x000C) XX XX XX XX
+  _(0x0010) XX XX XX XX
+  _(0x0014) XX XX XX XX
+  _("        dst address  ")
+  _(0x0018) XX XX XX XX
+  _(0x001C) XX XX XX XX
+  _(0x0020) XX XX XX XX
+  _(0x0024) XX XX XX XX
+  _("L4T/U  sport dport   ")
+  _(tcpudp) XX XX XX XX _(padpad) __ __ __ __ _(padeth) __ __;
+
+#undef XX
+#undef __
+#undef _
+#undef v
+
+     static int count_skip (u8 * p, u32 size)
+{
+  u64 *p64 = (u64 *) p;
+  /* Be tolerant to null pointer */
+  if (0 == p)
+    return 0;
+
+  while ((0ULL == *p64) && ((u8 *) p64 - p) < size)
+    {
+      p64++;
+    }
+  return (p64 - (u64 *) p) / 2;
+}
+
+static int
+acl_classify_add_del_table_big (vnet_classify_main_t * cm, u8 * mask,
+			    u32 mask_len, u32 next_table_index,
+			    u32 miss_next_index, u32 * table_index,
+			    int is_add)
+{
+  u32 nbuckets = 65536;
+  u32 memory_size = 2 << 30;
+  u32 skip = count_skip (mask, mask_len);
+  u32 match = (mask_len / 16) - skip;
+  u8 *skip_mask_ptr = mask + 16 * skip;
+  u32 current_data_flag = 0;
+  int current_data_offset = 0;
+
+  if (0 == match)
+    match = 1;
+
+  return vnet_classify_add_del_table (cm, skip_mask_ptr, nbuckets,
+				      memory_size, skip, match,
+				      next_table_index, miss_next_index,
+				      table_index, current_data_flag,
+				      current_data_offset, is_add);
+}
+
+static int
+acl_classify_add_del_table_small (vnet_classify_main_t * cm, u8 * mask,
+			    u32 mask_len, u32 next_table_index,
+			    u32 miss_next_index, u32 * table_index,
+			    int is_add)
+{
+  u32 nbuckets = 32;
+  u32 memory_size = 2 << 20;
+  u32 skip = count_skip (mask, mask_len);
+  u32 match = (mask_len / 16) - skip;
+  u8 *skip_mask_ptr = mask + 16 * skip;
+  u32 current_data_flag = 0;
+  int current_data_offset = 0;
+
+  if (0 == match)
+    match = 1;
+
+  return vnet_classify_add_del_table (cm, skip_mask_ptr, nbuckets,
+				      memory_size, skip, match,
+				      next_table_index, miss_next_index,
+				      table_index, current_data_flag,
+				      current_data_offset, is_add);
+}
+
+
+static int
+acl_unhook_l2_input_classify (acl_main_t * am, u32 sw_if_index)
+{
+  vnet_classify_main_t *cm = &vnet_classify_main;
+  u32 ip4_table_index = ~0;
+  u32 ip6_table_index = ~0;
+
+  vec_validate_init_empty (am->acl_ip4_input_classify_table_by_sw_if_index,
+			   sw_if_index, ~0);
+  vec_validate_init_empty (am->acl_ip6_input_classify_table_by_sw_if_index,
+			   sw_if_index, ~0);
+
+  vnet_l2_input_classify_enable_disable (sw_if_index, 0);
+
+  if (am->acl_ip4_input_classify_table_by_sw_if_index[sw_if_index] != ~0)
+    {
+      ip4_table_index =
+	am->acl_ip4_input_classify_table_by_sw_if_index[sw_if_index];
+      am->acl_ip4_input_classify_table_by_sw_if_index[sw_if_index] = ~0;
+      acl_classify_add_del_table_big (cm, ip4_5tuple_mask,
+				  sizeof (ip4_5tuple_mask) - 1, ~0,
+				  am->l2_input_classify_next_acl,
+				  &ip4_table_index, 0);
+    }
+  if (am->acl_ip6_input_classify_table_by_sw_if_index[sw_if_index] != ~0)
+    {
+      ip6_table_index =
+	am->acl_ip6_input_classify_table_by_sw_if_index[sw_if_index];
+      am->acl_ip6_input_classify_table_by_sw_if_index[sw_if_index] = ~0;
+      acl_classify_add_del_table_big (cm, ip6_5tuple_mask,
+				  sizeof (ip6_5tuple_mask) - 1, ~0,
+				  am->l2_input_classify_next_acl,
+				  &ip6_table_index, 0);
+    }
+
+  return 0;
+}
+
+static int
+acl_unhook_l2_output_classify (acl_main_t * am, u32 sw_if_index)
+{
+  vnet_classify_main_t *cm = &vnet_classify_main;
+  u32 ip4_table_index = ~0;
+  u32 ip6_table_index = ~0;
+
+  vec_validate_init_empty (am->acl_ip4_output_classify_table_by_sw_if_index,
+			   sw_if_index, ~0);
+  vec_validate_init_empty (am->acl_ip6_output_classify_table_by_sw_if_index,
+			   sw_if_index, ~0);
+
+  vnet_l2_output_classify_enable_disable (sw_if_index, 0);
+
+  if (am->acl_ip4_output_classify_table_by_sw_if_index[sw_if_index] != ~0)
+    {
+      ip4_table_index =
+	am->acl_ip4_output_classify_table_by_sw_if_index[sw_if_index];
+      am->acl_ip4_output_classify_table_by_sw_if_index[sw_if_index] = ~0;
+      acl_classify_add_del_table_big (cm, ip4_5tuple_mask,
+				  sizeof (ip4_5tuple_mask) - 1, ~0,
+				  am->l2_output_classify_next_acl,
+				  &ip4_table_index, 0);
+    }
+  if (am->acl_ip6_output_classify_table_by_sw_if_index[sw_if_index] != ~0)
+    {
+      ip6_table_index =
+	am->acl_ip6_output_classify_table_by_sw_if_index[sw_if_index];
+      am->acl_ip6_output_classify_table_by_sw_if_index[sw_if_index] = ~0;
+      acl_classify_add_del_table_big (cm, ip6_5tuple_mask,
+				  sizeof (ip6_5tuple_mask) - 1, ~0,
+				  am->l2_output_classify_next_acl,
+				  &ip6_table_index, 0);
+    }
+
+  return 0;
+}
+
+static int
+acl_hook_l2_input_classify (acl_main_t * am, u32 sw_if_index)
+{
+  vnet_classify_main_t *cm = &vnet_classify_main;
+  u32 ip4_table_index = ~0;
+  u32 ip6_table_index = ~0;
+  int rv;
+
+  /* in case there were previous tables attached */
+  acl_unhook_l2_input_classify (am, sw_if_index);
+  rv =
+    acl_classify_add_del_table_big (cm, ip4_5tuple_mask,
+				sizeof (ip4_5tuple_mask) - 1, ~0,
+				am->l2_input_classify_next_acl,
+				&ip4_table_index, 1);
+  if (rv)
+    return rv;
+  rv =
+    acl_classify_add_del_table_big (cm, ip6_5tuple_mask,
+				sizeof (ip6_5tuple_mask) - 1, ~0,
+				am->l2_input_classify_next_acl,
+				&ip6_table_index, 1);
+  if (rv)
+    {
+      acl_classify_add_del_table_big (cm, ip4_5tuple_mask,
+				  sizeof (ip4_5tuple_mask) - 1, ~0,
+				  am->l2_input_classify_next_acl,
+				  &ip4_table_index, 0);
+      return rv;
+    }
+  rv =
+    vnet_l2_input_classify_set_tables (sw_if_index, ip4_table_index,
+				       ip6_table_index, ~0);
+  clib_warning
+    ("ACL enabling on interface sw_if_index %d, setting tables to the following: ip4: %d ip6: %d\n",
+     sw_if_index, ip4_table_index, ip6_table_index);
+  if (rv)
+    {
+      acl_classify_add_del_table_big (cm, ip6_5tuple_mask,
+				  sizeof (ip6_5tuple_mask) - 1, ~0,
+				  am->l2_input_classify_next_acl,
+				  &ip6_table_index, 0);
+      acl_classify_add_del_table_big (cm, ip4_5tuple_mask,
+				  sizeof (ip4_5tuple_mask) - 1, ~0,
+				  am->l2_input_classify_next_acl,
+				  &ip4_table_index, 0);
+      return rv;
+    }
+
+  am->acl_ip4_input_classify_table_by_sw_if_index[sw_if_index] =
+    ip4_table_index;
+  am->acl_ip6_input_classify_table_by_sw_if_index[sw_if_index] =
+    ip6_table_index;
+
+  vnet_l2_input_classify_enable_disable (sw_if_index, 1);
+  return rv;
+}
+
+static int
+acl_hook_l2_output_classify (acl_main_t * am, u32 sw_if_index)
+{
+  vnet_classify_main_t *cm = &vnet_classify_main;
+  u32 ip4_table_index = ~0;
+  u32 ip6_table_index = ~0;
+  int rv;
+
+  /* in case there were previous tables attached */
+  acl_unhook_l2_output_classify (am, sw_if_index);
+  rv =
+    acl_classify_add_del_table_big (cm, ip4_5tuple_mask,
+				sizeof (ip4_5tuple_mask) - 1, ~0,
+				am->l2_output_classify_next_acl,
+				&ip4_table_index, 1);
+  if (rv)
+    return rv;
+  rv =
+    acl_classify_add_del_table_big (cm, ip6_5tuple_mask,
+				sizeof (ip6_5tuple_mask) - 1, ~0,
+				am->l2_output_classify_next_acl,
+				&ip6_table_index, 1);
+  if (rv)
+    {
+      acl_classify_add_del_table_big (cm, ip4_5tuple_mask,
+				  sizeof (ip4_5tuple_mask) - 1, ~0,
+				  am->l2_output_classify_next_acl,
+				  &ip4_table_index, 0);
+      return rv;
+    }
+  rv =
+    vnet_l2_output_classify_set_tables (sw_if_index, ip4_table_index,
+					ip6_table_index, ~0);
+  clib_warning
+    ("ACL enabling on interface sw_if_index %d, setting tables to the following: ip4: %d ip6: %d\n",
+     sw_if_index, ip4_table_index, ip6_table_index);
+  if (rv)
+    {
+      acl_classify_add_del_table_big (cm, ip6_5tuple_mask,
+				  sizeof (ip6_5tuple_mask) - 1, ~0,
+				  am->l2_output_classify_next_acl,
+				  &ip6_table_index, 0);
+      acl_classify_add_del_table_big (cm, ip4_5tuple_mask,
+				  sizeof (ip4_5tuple_mask) - 1, ~0,
+				  am->l2_output_classify_next_acl,
+				  &ip4_table_index, 0);
+      return rv;
+    }
+
+  am->acl_ip4_output_classify_table_by_sw_if_index[sw_if_index] =
+    ip4_table_index;
+  am->acl_ip6_output_classify_table_by_sw_if_index[sw_if_index] =
+    ip6_table_index;
+
+  vnet_l2_output_classify_enable_disable (sw_if_index, 1);
+  return rv;
+}
+
+
+int
+acl_interface_in_enable_disable (acl_main_t * am, u32 sw_if_index,
+				 int enable_disable)
+{
+  int rv;
+
+  /* Utterly wrong? */
+  if (pool_is_free_index (am->vnet_main->interface_main.sw_interfaces,
+			  sw_if_index))
+    return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+  if (enable_disable)
+    {
+      rv = acl_hook_l2_input_classify (am, sw_if_index);
+    }
+  else
+    {
+      rv = acl_unhook_l2_input_classify (am, sw_if_index);
+    }
+
+  return rv;
+}
+
+int
+acl_interface_out_enable_disable (acl_main_t * am, u32 sw_if_index,
+				  int enable_disable)
+{
+  int rv;
+
+  /* Utterly wrong? */
+  if (pool_is_free_index (am->vnet_main->interface_main.sw_interfaces,
+			  sw_if_index))
+    return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+  if (enable_disable)
+    {
+      rv = acl_hook_l2_output_classify (am, sw_if_index);
+    }
+  else
+    {
+      rv = acl_unhook_l2_output_classify (am, sw_if_index);
+    }
+
+  return rv;
+}
+
+
+static int
+acl_interface_add_inout_acl (u32 sw_if_index, u8 is_input, u32 acl_list_index)
+{
+  acl_main_t *am = &acl_main;
+  if (is_input)
+    {
+      vec_validate (am->input_acl_vec_by_sw_if_index, sw_if_index);
+      vec_add (am->input_acl_vec_by_sw_if_index[sw_if_index], &acl_list_index,
+	       1);
+      acl_interface_in_enable_disable (am, sw_if_index, 1);
+    }
+  else
+    {
+      vec_validate (am->output_acl_vec_by_sw_if_index, sw_if_index);
+      vec_add (am->output_acl_vec_by_sw_if_index[sw_if_index],
+	       &acl_list_index, 1);
+      acl_interface_out_enable_disable (am, sw_if_index, 1);
+    }
+  return 0;
+}
+
+static int
+acl_interface_del_inout_acl (u32 sw_if_index, u8 is_input, u32 acl_list_index)
+{
+  acl_main_t *am = &acl_main;
+  int i;
+  int rv = -1;
+  if (is_input)
+    {
+      vec_validate (am->input_acl_vec_by_sw_if_index, sw_if_index);
+      for (i = 0; i < vec_len (am->input_acl_vec_by_sw_if_index[sw_if_index]);
+	   i++)
+	{
+	  if (acl_list_index ==
+	      am->input_acl_vec_by_sw_if_index[sw_if_index][i])
+	    {
+	      vec_del1 (am->input_acl_vec_by_sw_if_index[sw_if_index], i);
+	      rv = 0;
+	      break;
+	    }
+	}
+      if (0 == vec_len (am->input_acl_vec_by_sw_if_index[sw_if_index]))
+	{
+	  acl_interface_in_enable_disable (am, sw_if_index, 0);
+	}
+    }
+  else
+    {
+      vec_validate (am->output_acl_vec_by_sw_if_index, sw_if_index);
+      for (i = 0;
+	   i < vec_len (am->output_acl_vec_by_sw_if_index[sw_if_index]); i++)
+	{
+	  if (acl_list_index ==
+	      am->output_acl_vec_by_sw_if_index[sw_if_index][i])
+	    {
+	      vec_del1 (am->output_acl_vec_by_sw_if_index[sw_if_index], i);
+	      rv = 0;
+	      break;
+	    }
+	}
+      if (0 == vec_len (am->output_acl_vec_by_sw_if_index[sw_if_index]))
+	{
+	  acl_interface_out_enable_disable (am, sw_if_index, 0);
+	}
+    }
+  return rv;
+}
+
+static void
+acl_interface_reset_inout_acls (u32 sw_if_index, u8 is_input)
+{
+  acl_main_t *am = &acl_main;
+  if (is_input)
+    {
+      acl_interface_in_enable_disable (am, sw_if_index, 0);
+      vec_validate (am->input_acl_vec_by_sw_if_index, sw_if_index);
+      vec_reset_length (am->input_acl_vec_by_sw_if_index[sw_if_index]);
+    }
+  else
+    {
+      acl_interface_out_enable_disable (am, sw_if_index, 0);
+      vec_validate (am->output_acl_vec_by_sw_if_index, sw_if_index);
+      vec_reset_length (am->output_acl_vec_by_sw_if_index[sw_if_index]);
+    }
+}
+
+static int
+acl_interface_add_del_inout_acl (u32 sw_if_index, u8 is_add, u8 is_input,
+				 u32 acl_list_index)
+{
+  int rv = -1;
+  if (is_add)
+    {
+      rv =
+	acl_interface_add_inout_acl (sw_if_index, is_input, acl_list_index);
+    }
+  else
+    {
+      rv =
+	acl_interface_del_inout_acl (sw_if_index, is_input, acl_list_index);
+    }
+  return rv;
+}
+
+
+static void *
+get_ptr_to_offset (vlib_buffer_t * b0, int offset)
+{
+  u8 *p = vlib_buffer_get_current (b0) + offset;
+  return p;
+}
+
+static u8
+acl_get_l4_proto (vlib_buffer_t * b0, int node_is_ip6)
+{
+  u8 proto;
+  int proto_offset;
+  if (node_is_ip6)
+    {
+      proto_offset = 20;
+    }
+  else
+    {
+      proto_offset = 23;
+    }
+  proto = *((u8 *) vlib_buffer_get_current (b0) + proto_offset);
+  return proto;
+}
+
+static int
+acl_match_addr (ip46_address_t * addr1, ip46_address_t * addr2, int prefixlen,
+		int is_ip6)
+{
+  if (prefixlen == 0)
+    {
+      /* match any always succeeds */
+      return 1;
+    }
+  if (is_ip6)
+    {
+      if (memcmp (addr1, addr2, prefixlen / 8))
+	{
+	  /* If the starting full bytes do not match, no point in bittwidling the thumbs further */
+	  return 0;
+	}
+      if (prefixlen % 8)
+	{
+	  u8 b1 = *((u8 *) addr1 + 1 + prefixlen / 8);
+	  u8 b2 = *((u8 *) addr2 + 1 + prefixlen / 8);
+	  u8 mask0 = (0xff - ((1 << (8 - (prefixlen % 8))) - 1));
+	  return (b1 & mask0) == b2;
+	}
+      else
+	{
+	  /* The prefix fits into integer number of bytes, so nothing left to do */
+	  return 1;
+	}
+    }
+  else
+    {
+      uint32_t a1 = ntohl (addr1->ip4.as_u32);
+      uint32_t a2 = ntohl (addr2->ip4.as_u32);
+      uint32_t mask0 = 0xffffffff - ((1 << (32 - prefixlen)) - 1);
+      return (a1 & mask0) == a2;
+    }
+}
+
+static int
+acl_match_port (u16 port, u16 port_first, u16 port_last, int is_ip6)
+{
+  return ((port >= port_first) && (port <= port_last));
+}
+
+static int
+acl_packet_match (acl_main_t * am, u32 acl_index, vlib_buffer_t * b0,
+		  u8 * r_action, int *r_is_ip6, u32 * r_acl_match_p,
+		  u32 * r_rule_match_p, u32 * trace_bitmap)
+{
+  ethernet_header_t *h0;
+  u16 type0;
+
+  ip46_address_t src, dst;
+  int is_ip6;
+  int is_ip4;
+  u8 proto;
+  u16 src_port;
+  u16 dst_port;
+  u8 tcp_flags = 0;
+  int i;
+  acl_list_t *a;
+  acl_rule_t *r;
+
+  h0 = vlib_buffer_get_current (b0);
+  type0 = clib_net_to_host_u16 (h0->type);
+  is_ip4 = (type0 == ETHERNET_TYPE_IP4);
+  is_ip6 = (type0 == ETHERNET_TYPE_IP6);
+
+  if (!(is_ip4 || is_ip6))
+    {
+      return 0;
+    }
+  /* The bunch of hardcoded offsets here is intentional to get rid of them
+     ASAP, when getting to a faster matching code */
+  if (is_ip4)
+    {
+      clib_memcpy (&src.ip4, get_ptr_to_offset (b0, 26), 4);
+      clib_memcpy (&dst.ip4, get_ptr_to_offset (b0, 30), 4);
+      proto = acl_get_l4_proto (b0, 0);
+      if (1 == proto)
+	{
+	  *trace_bitmap |= 0x00000001;
+	  /* type */
+	  src_port = *(u8 *) get_ptr_to_offset (b0, 34);
+	  /* code */
+	  dst_port = *(u8 *) get_ptr_to_offset (b0, 35);
+	}
+      else
+	{
+	  /* assume TCP/UDP */
+	  src_port = (*(u16 *) get_ptr_to_offset (b0, 34));
+	  dst_port = (*(u16 *) get_ptr_to_offset (b0, 36));
+	  /* UDP gets ability to check on an oddball data byte as a bonus */
+	  tcp_flags = *(u8 *) get_ptr_to_offset (b0, 14 + 20 + 13);
+	}
+    }
+  else /* is_ipv6 implicitly */
+    {
+      clib_memcpy (&src, get_ptr_to_offset (b0, 22), 16);
+      clib_memcpy (&dst, get_ptr_to_offset (b0, 38), 16);
+      proto = acl_get_l4_proto (b0, 1);
+      if (58 == proto)
+	{
+	  *trace_bitmap |= 0x00000002;
+	  /* type */
+	  src_port = *(u8 *) get_ptr_to_offset (b0, 54);
+	  /* code */
+	  dst_port = *(u8 *) get_ptr_to_offset (b0, 55);
+	}
+      else
+	{
+	  /* assume TCP/UDP */
+	  src_port = (*(u16 *) get_ptr_to_offset (b0, 54));
+	  dst_port = (*(u16 *) get_ptr_to_offset (b0, 56));
+	  tcp_flags = *(u8 *) get_ptr_to_offset (b0, 14 + 40 + 13);
+	}
+    }
+  if (pool_is_free_index (am->acls, acl_index))
+    {
+      if (r_acl_match_p)
+	*r_acl_match_p = acl_index;
+      if (r_rule_match_p)
+	*r_rule_match_p = -1;
+      /* the ACL does not exist but is used for policy. Block traffic. */
+      return 0;
+    }
+  a = am->acls + acl_index;
+  for (i = 0; i < a->count; i++)
+    {
+      r = a->rules + i;
+      if (is_ip6 != r->is_ipv6)
+	{
+	  continue;
+	}
+      if (!acl_match_addr (&dst, &r->dst, r->dst_prefixlen, is_ip6))
+	continue;
+      if (!acl_match_addr (&src, &r->src, r->src_prefixlen, is_ip6))
+	continue;
+      if (r->proto)
+	{
+	  if (proto != r->proto)
+	    continue;
+	  if (!acl_match_port
+	      (src_port, r->src_port_or_type_first, r->src_port_or_type_last,
+	       is_ip6))
+	    continue;
+	  if (!acl_match_port
+	      (dst_port, r->dst_port_or_code_first, r->dst_port_or_code_last,
+	       is_ip6))
+	    continue;
+	  /* No need for check of proto == TCP, since in other rules both fields should be zero, so this match will succeed */
+	  if ((tcp_flags & r->tcp_flags_mask) != r->tcp_flags_value)
+	    continue;
+	}
+      /* everything matches! */
+      *r_action = r->is_permit;
+      *r_is_ip6 = is_ip6;
+      if (r_acl_match_p)
+	*r_acl_match_p = acl_index;
+      if (r_rule_match_p)
+	*r_rule_match_p = i;
+      return 1;
+    }
+  return 0;
+}
+
+void
+input_acl_packet_match (u32 sw_if_index, vlib_buffer_t * b0, u32 * nextp,
+			u32 * acl_match_p, u32 * rule_match_p,
+			u32 * trace_bitmap)
+{
+  acl_main_t *am = &acl_main;
+  uint8_t action = 0;
+  int is_ip6 = 0;
+  int i;
+  vec_validate (am->input_acl_vec_by_sw_if_index, sw_if_index);
+  for (i = 0; i < vec_len (am->input_acl_vec_by_sw_if_index[sw_if_index]);
+       i++)
+    {
+      if (acl_packet_match
+	  (am, am->input_acl_vec_by_sw_if_index[sw_if_index][i], b0, &action,
+	   &is_ip6, acl_match_p, rule_match_p, trace_bitmap))
+	{
+	  if (is_ip6)
+	    {
+	      *nextp = am->acl_in_ip6_match_next[action];
+	    }
+	  else
+	    {
+	      *nextp = am->acl_in_ip4_match_next[action];
+	    }
+	  return;
+	}
+    }
+  if (vec_len (am->input_acl_vec_by_sw_if_index[sw_if_index]) > 0)
+    {
+      /* If there are ACLs and none matched, deny by default */
+      *nextp = 0;
+    }
+
+}
+
+void
+output_acl_packet_match (u32 sw_if_index, vlib_buffer_t * b0, u32 * nextp,
+			 u32 * acl_match_p, u32 * rule_match_p,
+			 u32 * trace_bitmap)
+{
+  acl_main_t *am = &acl_main;
+  uint8_t action = 0;
+  int is_ip6 = 0;
+  int i;
+  vec_validate (am->output_acl_vec_by_sw_if_index, sw_if_index);
+  for (i = 0; i < vec_len (am->output_acl_vec_by_sw_if_index[sw_if_index]);
+       i++)
+    {
+      if (acl_packet_match
+	  (am, am->output_acl_vec_by_sw_if_index[sw_if_index][i], b0, &action,
+	   &is_ip6, acl_match_p, rule_match_p, trace_bitmap))
+	{
+	  if (is_ip6)
+	    {
+	      *nextp = am->acl_out_ip6_match_next[action];
+	    }
+	  else
+	    {
+	      *nextp = am->acl_out_ip4_match_next[action];
+	    }
+	  return;
+	}
+    }
+  if (vec_len (am->output_acl_vec_by_sw_if_index[sw_if_index]) > 0)
+    {
+      /* If there are ACLs and none matched, deny by default */
+      *nextp = 0;
+    }
+}
+
+typedef struct
+{
+  u8 is_ipv6;
+  u8 mac_mask[6];
+  u8 prefix_len;
+  u32 count;
+  u32 table_index;
+} macip_match_type_t;
+
+static u32
+macip_find_match_type (macip_match_type_t * mv, u8 * mac_mask, u8 prefix_len,
+		       u8 is_ipv6)
+{
+  u32 i;
+  if (mv)
+    {
+      for (i = 0; i < vec_len (mv); i++)
+	{
+	  if ((mv[i].prefix_len == prefix_len) && (mv[i].is_ipv6 == is_ipv6)
+	      && (0 == memcmp (mv[i].mac_mask, mac_mask, 6)))
+	    {
+	      return i;
+	    }
+	}
+    }
+  return ~0;
+}
+
+
+/* Get metric used to sort match types.
+   The more specific and the more often seen - the bigger the metric */
+static int
+match_type_metric (macip_match_type_t * m)
+{
+  /* FIXME: count the ones in the MAC mask as well, check how well this heuristic works in real life */
+  return m->prefix_len + m->is_ipv6 + 10 * m->count;
+}
+
+static int
+match_type_compare (macip_match_type_t * m1, macip_match_type_t * m2)
+{
+  /* Ascending sort based on the metric values */
+  return match_type_metric (m1) - match_type_metric (m2);
+}
+
+static int
+macip_create_classify_tables (acl_main_t * am, u32 macip_acl_index)
+{
+  macip_match_type_t *mvec = NULL;
+  macip_match_type_t *mt;
+  macip_acl_list_t *a = &am->macip_acls[macip_acl_index];
+  int i;
+  u32 match_type_index;
+  u32 last_table;
+  u8 mask[5 * 16];
+  vnet_classify_main_t *cm = &vnet_classify_main;
+
+  /* Count the number of different types of rules */
+  for (i = 0; i < a->count; i++)
+    {
+      if (~0 ==
+	  (match_type_index =
+	   macip_find_match_type (mvec, a->rules[i].src_mac_mask,
+				  a->rules[i].src_prefixlen,
+				  a->rules[i].is_ipv6)))
+	{
+	  match_type_index = vec_len (mvec);
+	  vec_validate (mvec, match_type_index);
+	  memcpy (mvec[match_type_index].mac_mask,
+		  a->rules[match_type_index].src_mac_mask, 6);
+	  mvec[match_type_index].prefix_len = a->rules[i].src_prefixlen;
+	  mvec[match_type_index].is_ipv6 = a->rules[i].is_ipv6;
+	  mvec[match_type_index].table_index = ~0;
+	}
+      mvec[match_type_index].count++;
+    }
+  /* Put the most frequently used tables last in the list so we can create classifier tables in reverse order */
+  vec_sort_with_function (mvec, match_type_compare);
+  /* Create the classifier tables */
+  last_table = ~0;
+  vec_foreach (mt, mvec)
+  {
+    int mask_len;
+    int is6 = a->rules[i].is_ipv6;
+    int l3_src_offs = is6 ? 22 : 26;	/* See the ascii art packet format above to verify these */
+    memset (mask, 0, sizeof (mask));
+    memcpy (&mask[6], mt->mac_mask, 6);
+    for (i = 0; i < (mt->prefix_len / 8); i++)
+      {
+	mask[l3_src_offs + i] = 0xff;
+      }
+    if (mt->prefix_len % 8)
+      {
+	mask[l3_src_offs + (mt->prefix_len / 8)] =
+	  0xff - ((1 << (8 - mt->prefix_len % 8)) - 1);
+      }
+    mask_len = ((l3_src_offs + (mt->prefix_len / 8)) / 16 + 1) * 16;
+    acl_classify_add_del_table_small (cm, mask, mask_len, last_table,
+				(~0 == last_table) ? 0 : ~0, &mt->table_index,
+				1);
+    last_table = mt->table_index;
+  }
+  a->ip4_table_index = ~0;
+  a->ip6_table_index = ~0;
+  a->l2_table_index = last_table;
+
+  /* Populate the classifier tables with rules from the MACIP ACL */
+  for (i = 0; i < a->count; i++)
+    {
+      u32 action = 0;
+      u32 metadata = 0;
+      int is6 = a->rules[i].is_ipv6;
+      int l3_src_offs = is6 ? 22 : 26;	/* See the ascii art packet format above to verify these */
+      memset (mask, 0, sizeof (mask));
+      memcpy (&mask[6], a->rules[i].src_mac, 6);
+      if (is6)
+	{
+	  memcpy (&mask[l3_src_offs], &a->rules[i].src_ip_addr.ip6, 16);
+	}
+      else
+	{
+	  memcpy (&mask[l3_src_offs], &a->rules[i].src_ip_addr.ip4, 4);
+	}
+      match_type_index =
+	macip_find_match_type (mvec, a->rules[i].src_mac_mask,
+			       a->rules[i].src_prefixlen,
+			       a->rules[i].is_ipv6);
+      /* add session to table mvec[match_type_index].table_index; */
+      vnet_classify_add_del_session (cm, mvec[match_type_index].table_index,
+				     mask, a->rules[i].is_permit ? ~0 : 0, i,
+				     0, action, metadata, 1);
+    }
+  return 0;
+}
+
+static void
+macip_destroy_classify_tables (acl_main_t * am, u32 macip_acl_index)
+{
+  vnet_classify_main_t *cm = &vnet_classify_main;
+  macip_acl_list_t *a = &am->macip_acls[macip_acl_index];
+
+  if (a->ip4_table_index != ~0)
+    {
+      acl_classify_add_del_table_small (cm, 0, ~0, ~0, ~0, &a->ip4_table_index, 0);
+      a->ip4_table_index = ~0;
+    }
+  if (a->ip6_table_index != ~0)
+    {
+      acl_classify_add_del_table_small (cm, 0, ~0, ~0, ~0, &a->ip6_table_index, 0);
+      a->ip6_table_index = ~0;
+    }
+  if (a->l2_table_index != ~0)
+    {
+      acl_classify_add_del_table_small (cm, 0, ~0, ~0, ~0, &a->l2_table_index, 0);
+      a->l2_table_index = ~0;
+    }
+}
+
+static int
+macip_acl_add_list (u32 count, vl_api_macip_acl_rule_t rules[],
+		    u32 * acl_list_index, u8 * tag)
+{
+  acl_main_t *am = &acl_main;
+  macip_acl_list_t *a;
+  macip_acl_rule_t *r;
+  macip_acl_rule_t *acl_new_rules;
+  int i;
+
+  /* Create and populate the rules */
+  acl_new_rules = clib_mem_alloc_aligned (sizeof (macip_acl_rule_t) * count,
+					  CLIB_CACHE_LINE_BYTES);
+  if (!acl_new_rules)
+    {
+      /* Could not allocate rules. New or existing ACL - bail out regardless */
+      return -1;
+    }
+
+  for (i = 0; i < count; i++)
+    {
+      r = &acl_new_rules[i];
+      r->is_permit = rules[i].is_permit;
+      r->is_ipv6 = rules[i].is_ipv6;
+      memcpy (&r->src_mac, rules[i].src_mac, 6);
+      memcpy (&r->src_mac_mask, rules[i].src_mac_mask, 6);
+
+      memcpy (&r->src_ip_addr, rules[i].src_ip_addr, sizeof (r->src_ip_addr));
+      r->src_prefixlen = rules[i].src_ip_prefix_len;
+    }
+
+  /* Get ACL index */
+  pool_get_aligned (am->macip_acls, a, CLIB_CACHE_LINE_BYTES);
+  memset (a, 0, sizeof (*a));
+  /* Will return the newly allocated ACL index */
+  *acl_list_index = a - am->macip_acls;
+
+  a->rules = acl_new_rules;
+  a->count = count;
+  memcpy (a->tag, tag, sizeof (a->tag));
+
+  /* Create and populate the classifer tables */
+  macip_create_classify_tables (am, *acl_list_index);
+
+  return 0;
+}
+
+
+/* No check for validity of sw_if_index - the callers were supposed to validate */
+
+static int
+macip_acl_interface_add_acl (acl_main_t * am, u32 sw_if_index,
+			     u32 macip_acl_index)
+{
+  macip_acl_list_t *a;
+  int rv;
+  if (pool_is_free_index (am->macip_acls, macip_acl_index))
+    {
+      return -1;
+    }
+  a = &am->macip_acls[macip_acl_index];
+  vec_validate_init_empty (am->macip_acl_by_sw_if_index, sw_if_index, ~0);
+  am->macip_acl_by_sw_if_index[sw_if_index] = macip_acl_index;
+  /* Apply the classifier tables for L2 ACLs */
+  rv =
+    vnet_set_input_acl_intfc (am->vlib_main, sw_if_index, a->ip4_table_index,
+			      a->ip6_table_index, a->l2_table_index, 1);
+  return rv;
+}
+
+static int
+macip_acl_interface_del_acl (acl_main_t * am, u32 sw_if_index)
+{
+  int rv;
+  vec_validate_init_empty (am->macip_acl_by_sw_if_index, sw_if_index, ~0);
+  am->macip_acl_by_sw_if_index[sw_if_index] = ~0;
+  /* remove the classifier tables off the interface L2 ACL */
+  rv = vnet_set_input_acl_intfc (am->vlib_main, sw_if_index, ~0, ~0, ~0, 0);
+  return rv;
+}
+
+static int
+macip_acl_del_list (u32 acl_list_index)
+{
+  acl_main_t *am = &acl_main;
+  macip_acl_list_t *a;
+  int i;
+  if (pool_is_free_index (am->macip_acls, acl_list_index))
+    {
+      return -1;
+    }
+
+  /* delete any references to the ACL */
+  for (i = 0; i < vec_len (am->macip_acl_by_sw_if_index); i++)
+    {
+      if (am->macip_acl_by_sw_if_index[i] == acl_list_index)
+	{
+	  macip_acl_interface_del_acl (am, i);
+	}
+    }
+
+  /* Now that classifier tables are detached, clean them up */
+  macip_destroy_classify_tables (am, acl_list_index);
+
+  /* now we can delete the ACL itself */
+  a = &am->macip_acls[acl_list_index];
+  if (a->rules)
+    {
+      clib_mem_free (a->rules);
+    }
+  pool_put (am->macip_acls, a);
+  return 0;
+}
+
+
+static int
+macip_acl_interface_add_del_acl (u32 sw_if_index, u8 is_add,
+				 u32 acl_list_index)
+{
+  acl_main_t *am = &acl_main;
+  int rv = -1;
+  if (is_add)
+    {
+      rv = macip_acl_interface_add_acl (am, sw_if_index, acl_list_index);
+    }
+  else
+    {
+      rv = macip_acl_interface_del_acl (am, sw_if_index);
+    }
+  return rv;
+}
+
+/* API message handler */
+static void
+vl_api_acl_add_replace_t_handler (vl_api_acl_add_replace_t * mp)
+{
+  vl_api_acl_add_replace_reply_t *rmp;
+  acl_main_t *am = &acl_main;
+  int rv;
+  u32 acl_list_index = ntohl (mp->acl_index);
+
+  rv = acl_add_list (ntohl (mp->count), mp->r, &acl_list_index, mp->tag);
+
+  /* *INDENT-OFF* */
+  REPLY_MACRO2(VL_API_ACL_ADD_REPLACE_REPLY,
+  ({
+    rmp->acl_index = htonl(acl_list_index);
+  }));
+  /* *INDENT-ON* */
+}
+
+static void
+vl_api_acl_del_t_handler (vl_api_acl_del_t * mp)
+{
+  acl_main_t *sm = &acl_main;
+  vl_api_acl_del_reply_t *rmp;
+  int rv;
+
+  rv = acl_del_list (ntohl (mp->acl_index));
+
+  REPLY_MACRO (VL_API_ACL_DEL_REPLY);
+}
+
+static void
+vl_api_acl_interface_add_del_t_handler (vl_api_acl_interface_add_del_t * mp)
+{
+  acl_main_t *sm = &acl_main;
+  vl_api_acl_interface_add_del_reply_t *rmp;
+  int rv = -1;
+  VALIDATE_SW_IF_INDEX (mp);
+
+  rv =
+    acl_interface_add_del_inout_acl (ntohl (mp->sw_if_index), mp->is_add,
+				     mp->is_input, ntohl (mp->acl_index));
+
+  BAD_SW_IF_INDEX_LABEL;
+
+  REPLY_MACRO (VL_API_ACL_INTERFACE_ADD_DEL_REPLY);
+}
+
+static void
+vl_api_acl_interface_set_acl_list_t_handler
+  (vl_api_acl_interface_set_acl_list_t * mp)
+{
+  acl_main_t *sm = &acl_main;
+  vl_api_acl_interface_set_acl_list_reply_t *rmp;
+  int rv = 0;
+  int i;
+  VALIDATE_SW_IF_INDEX (mp);
+  u32 sw_if_index = ntohl (mp->sw_if_index);
+
+  acl_interface_reset_inout_acls (sw_if_index, 0);
+  acl_interface_reset_inout_acls (sw_if_index, 1);
+
+  for (i = 0; i < mp->count; i++)
+    {
+      acl_interface_add_del_inout_acl (sw_if_index, 1, (i < mp->n_input),
+				       ntohl (mp->acls[i]));
+    }
+
+  BAD_SW_IF_INDEX_LABEL;
+
+  REPLY_MACRO (VL_API_ACL_INTERFACE_SET_ACL_LIST_REPLY);
+}
+
+static void
+copy_acl_rule_to_api_rule (vl_api_acl_rule_t * api_rule, acl_rule_t * r)
+{
+  api_rule->is_permit = r->is_permit;
+  api_rule->is_ipv6 = r->is_ipv6;
+  if(r->is_ipv6)
+    {
+      memcpy (api_rule->src_ip_addr, &r->src, sizeof (r->src));
+      memcpy (api_rule->dst_ip_addr, &r->dst, sizeof (r->dst));
+    }
+  else
+    {
+      memcpy (api_rule->src_ip_addr, &r->src.ip4, sizeof (r->src.ip4));
+      memcpy (api_rule->dst_ip_addr, &r->dst.ip4, sizeof (r->dst.ip4));
+    }
+  api_rule->src_ip_prefix_len = r->src_prefixlen;
+  api_rule->dst_ip_prefix_len = r->dst_prefixlen;
+  api_rule->proto = r->proto;
+  api_rule->srcport_or_icmptype_first = r->src_port_or_type_first;
+  api_rule->srcport_or_icmptype_last = r->src_port_or_type_last;
+  api_rule->dstport_or_icmpcode_first = r->dst_port_or_code_first;
+  api_rule->dstport_or_icmpcode_last = r->dst_port_or_code_last;
+  api_rule->tcp_flags_mask = r->tcp_flags_mask;
+  api_rule->tcp_flags_value = r->tcp_flags_value;
+}
+
+static void
+send_acl_details (acl_main_t * am, unix_shared_memory_queue_t * q,
+		  acl_list_t * acl, u32 context)
+{
+  vl_api_acl_details_t *mp;
+  vl_api_acl_rule_t *rules;
+  int i;
+  int msg_size = sizeof (*mp) + sizeof (mp->r[0]) * acl->count;
+
+  mp = vl_msg_api_alloc (msg_size);
+  memset (mp, 0, msg_size);
+  mp->_vl_msg_id = ntohs (VL_API_ACL_DETAILS + am->msg_id_base);
+
+  /* fill in the message */
+  mp->context = context;
+  mp->count = htonl (acl->count);
+  mp->acl_index = htonl (acl - am->acls);
+  memcpy (mp->tag, acl->tag, sizeof (mp->tag));
+  // clib_memcpy (mp->r, acl->rules, acl->count * sizeof(acl->rules[0]));
+  rules = mp->r;
+  for (i = 0; i < acl->count; i++)
+    {
+      copy_acl_rule_to_api_rule (&rules[i], &acl->rules[i]);
+    }
+
+  clib_warning("Sending acl details for ACL index %d", ntohl(mp->acl_index));
+  vl_msg_api_send_shmem (q, (u8 *) & mp);
+}
+
+
+static void
+vl_api_acl_dump_t_handler (vl_api_acl_dump_t * mp)
+{
+  acl_main_t *am = &acl_main;
+  u32 acl_index;
+  acl_list_t *acl;
+
+  int rv = -1;
+  unix_shared_memory_queue_t *q;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    {
+      return;
+    }
+
+  if (mp->acl_index == ~0)
+    {
+    /* *INDENT-OFF* */
+    /* Just dump all ACLs */
+    pool_foreach (acl, am->acls,
+    ({
+      send_acl_details(am, q, acl, mp->context);
+    }));
+    /* *INDENT-ON* */
+    }
+  else
+    {
+      acl_index = ntohl (mp->acl_index);
+      if (!pool_is_free_index (am->acls, acl_index))
+	{
+	  acl = &am->acls[acl_index];
+	  send_acl_details (am, q, acl, mp->context);
+	}
+    }
+
+  if (rv == -1)
+    {
+      /* FIXME API: should we signal an error here at all ? */
+      return;
+    }
+}
+
+static void
+send_acl_interface_list_details (acl_main_t * am,
+				 unix_shared_memory_queue_t * q,
+				 u32 sw_if_index, u32 context)
+{
+  vl_api_acl_interface_list_details_t *mp;
+  int msg_size;
+  int n_input;
+  int n_output;
+  int count;
+  int i = 0;
+
+  vec_validate (am->input_acl_vec_by_sw_if_index, sw_if_index);
+  vec_validate (am->output_acl_vec_by_sw_if_index, sw_if_index);
+
+  n_input = vec_len (am->input_acl_vec_by_sw_if_index[sw_if_index]);
+  n_output = vec_len (am->output_acl_vec_by_sw_if_index[sw_if_index]);
+  count = n_input + n_output;
+
+  msg_size = sizeof (*mp);
+  msg_size += sizeof (mp->acls[0]) * count;
+
+  mp = vl_msg_api_alloc (msg_size);
+  memset (mp, 0, msg_size);
+  mp->_vl_msg_id =
+    ntohs (VL_API_ACL_INTERFACE_LIST_DETAILS + am->msg_id_base);
+
+  /* fill in the message */
+  mp->context = context;
+  mp->sw_if_index = htonl (sw_if_index);
+  mp->count = count;
+  mp->n_input = n_input;
+  for (i = 0; i < n_input; i++)
+    {
+      mp->acls[i] = htonl (am->input_acl_vec_by_sw_if_index[sw_if_index][i]);
+    }
+  for (i = 0; i < n_output; i++)
+    {
+      mp->acls[n_input + i] =
+	htonl (am->output_acl_vec_by_sw_if_index[sw_if_index][i]);
+    }
+
+  vl_msg_api_send_shmem (q, (u8 *) & mp);
+}
+
+static void
+vl_api_acl_interface_list_dump_t_handler (vl_api_acl_interface_list_dump_t *
+					  mp)
+{
+  acl_main_t *am = &acl_main;
+  vnet_sw_interface_t *swif;
+  vnet_interface_main_t *im = &am->vnet_main->interface_main;
+
+  int rv = -1;
+  u32 sw_if_index;
+  unix_shared_memory_queue_t *q;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    {
+      return;
+    }
+
+  if (mp->sw_if_index == ~0)
+    {
+    /* *INDENT-OFF* */
+    pool_foreach (swif, im->sw_interfaces,
+    ({
+      send_acl_interface_list_details(am, q, swif->sw_if_index, mp->context);
+    }));
+    /* *INDENT-ON* */
+    }
+  else
+    {
+      VALIDATE_SW_IF_INDEX (mp);
+      sw_if_index = ntohl (mp->sw_if_index);
+      send_acl_interface_list_details (am, q, sw_if_index, mp->context);
+    }
+  return;
+
+  BAD_SW_IF_INDEX_LABEL;
+  if (rv == -1)
+    {
+      /* FIXME API: should we signal an error here at all ? */
+      return;
+    }
+}
+
+/* MACIP ACL API handlers */
+
+static void
+vl_api_macip_acl_add_t_handler (vl_api_macip_acl_add_t * mp)
+{
+  vl_api_macip_acl_add_reply_t *rmp;
+  acl_main_t *am = &acl_main;
+  int rv;
+  u32 acl_list_index = ~0;
+
+  rv =
+    macip_acl_add_list (ntohl (mp->count), mp->r, &acl_list_index, mp->tag);
+
+  /* *INDENT-OFF* */
+  REPLY_MACRO2(VL_API_MACIP_ACL_ADD_REPLY,
+  ({
+    rmp->acl_index = htonl(acl_list_index);
+  }));
+  /* *INDENT-ON* */
+}
+
+static void
+vl_api_macip_acl_del_t_handler (vl_api_macip_acl_del_t * mp)
+{
+  acl_main_t *sm = &acl_main;
+  vl_api_macip_acl_del_reply_t *rmp;
+  int rv;
+
+  rv = macip_acl_del_list (ntohl (mp->acl_index));
+
+  REPLY_MACRO (VL_API_MACIP_ACL_DEL_REPLY);
+}
+
+static void
+vl_api_macip_acl_interface_add_del_t_handler
+  (vl_api_macip_acl_interface_add_del_t * mp)
+{
+  acl_main_t *sm = &acl_main;
+  vl_api_macip_acl_interface_add_del_reply_t *rmp;
+  int rv = -1;
+  VALIDATE_SW_IF_INDEX (mp);
+
+  rv =
+    macip_acl_interface_add_del_acl (ntohl (mp->sw_if_index), mp->is_add,
+				     ntohl (mp->acl_index));
+
+  BAD_SW_IF_INDEX_LABEL;
+
+  REPLY_MACRO (VL_API_MACIP_ACL_INTERFACE_ADD_DEL_REPLY);
+}
+
+static void
+send_macip_acl_details (acl_main_t * am, unix_shared_memory_queue_t * q,
+			macip_acl_list_t * acl, u32 context)
+{
+  vl_api_macip_acl_details_t *mp;
+  vl_api_macip_acl_rule_t *rules;
+  macip_acl_rule_t *r;
+  int i;
+  int msg_size = sizeof (*mp) + (acl ? sizeof (mp->r[0]) * acl->count : 0);
+
+  mp = vl_msg_api_alloc (msg_size);
+  memset (mp, 0, msg_size);
+  mp->_vl_msg_id = ntohs (VL_API_MACIP_ACL_DETAILS + am->msg_id_base);
+
+  /* fill in the message */
+  mp->context = context;
+  if (acl)
+    {
+      memcpy (mp->tag, acl->tag, sizeof (mp->tag));
+      mp->count = htonl (acl->count);
+      mp->acl_index = htonl (acl - am->macip_acls);
+      rules = mp->r;
+      for (i = 0; i < acl->count; i++)
+	{
+	  r = &acl->rules[i];
+	  rules[i].is_permit = r->is_permit;
+	  rules[i].is_ipv6 = r->is_ipv6;
+	  memcpy (rules[i].src_mac, &r->src_mac, sizeof (r->src_mac));
+	  memcpy (rules[i].src_mac_mask, &r->src_mac_mask,
+		  sizeof (r->src_mac_mask));
+
+	  memcpy (rules[i].src_ip_addr, &r->src_ip_addr,
+		  sizeof (r->src_ip_addr));
+	  rules[i].src_ip_prefix_len = r->src_prefixlen;
+	}
+    }
+  else
+    {
+      /* No martini, no party - no ACL applied to this interface. */
+      mp->acl_index = ~0;
+      mp->count = 0;
+    }
+
+  vl_msg_api_send_shmem (q, (u8 *) & mp);
+}
+
+
+static void
+vl_api_macip_acl_dump_t_handler (vl_api_macip_acl_dump_t * mp)
+{
+  acl_main_t *am = &acl_main;
+  macip_acl_list_t *acl;
+
+  unix_shared_memory_queue_t *q;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    {
+      return;
+    }
+
+  if (mp->acl_index == ~0)
+    {
+      /* Just dump all ACLs for now, with sw_if_index = ~0 */
+      pool_foreach (acl, am->macip_acls, (
+					   {
+					   send_macip_acl_details (am, q, acl,
+								   mp->
+								   context);}
+		    ));
+      /* *INDENT-ON* */
+    }
+  else
+    {
+      u32 acl_index = ntohl (mp->acl_index);
+      if (!pool_is_free_index (am->macip_acls, acl_index))
+	{
+	  acl = &am->macip_acls[acl_index];
+	  send_macip_acl_details (am, q, acl, mp->context);
+	}
+    }
+}
+
+static void
+vl_api_macip_acl_interface_get_t_handler (vl_api_macip_acl_interface_get_t *
+					  mp)
+{
+  acl_main_t *am = &acl_main;
+  vl_api_macip_acl_interface_get_reply_t *rmp;
+  u32 count = vec_len (am->macip_acl_by_sw_if_index);
+  int msg_size = sizeof (*rmp) + sizeof (rmp->acls[0]) * count;
+  unix_shared_memory_queue_t *q;
+  int i;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    {
+      return;
+    }
+
+  rmp = vl_msg_api_alloc (msg_size);
+  memset (rmp, 0, msg_size);
+  rmp->_vl_msg_id =
+    ntohs (VL_API_MACIP_ACL_INTERFACE_GET_REPLY + am->msg_id_base);
+  rmp->context = mp->context;
+  rmp->count = htonl (count);
+  for (i = 0; i < count; i++)
+    {
+      rmp->acls[i] = htonl (am->macip_acl_by_sw_if_index[i]);
+    }
+
+  vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+
+
+/* Set up the API message handling tables */
+static clib_error_t *
+acl_plugin_api_hookup (vlib_main_t * vm)
+{
+  acl_main_t *sm = &acl_main;
+#define _(N,n)                                                  \
+    vl_msg_api_set_handlers((VL_API_##N + sm->msg_id_base),     \
+                           #n,					\
+                           vl_api_##n##_t_handler,              \
+                           vl_noop_handler,                     \
+                           vl_api_##n##_t_endian,               \
+                           vl_api_##n##_t_print,                \
+                           sizeof(vl_api_##n##_t), 1);
+  foreach_acl_plugin_api_msg;
+#undef _
+
+  return 0;
+}
+
+#define vl_msg_name_crc_list
+#include <acl/acl_all_api_h.h>
+#undef vl_msg_name_crc_list
+
+static void
+setup_message_id_table (acl_main_t * sm, api_main_t * am)
+{
+#define _(id,n,crc) \
+  vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id + sm->msg_id_base);
+  foreach_vl_msg_name_crc_acl;
+#undef _
+}
+
+u32
+register_match_action_nexts (u32 next_in_ip4, u32 next_in_ip6,
+			     u32 next_out_ip4, u32 next_out_ip6)
+{
+  acl_main_t *am = &acl_main;
+  u32 act = am->n_match_actions;
+  if (am->n_match_actions == 255)
+    {
+      return ~0;
+    }
+  am->n_match_actions++;
+  am->acl_in_ip4_match_next[act] = next_in_ip4;
+  am->acl_in_ip6_match_next[act] = next_in_ip6;
+  am->acl_out_ip4_match_next[act] = next_out_ip4;
+  am->acl_out_ip6_match_next[act] = next_out_ip6;
+  return act;
+}
+
+void
+acl_setup_nodes (void)
+{
+  vlib_main_t *vm = vlib_get_main ();
+  acl_main_t *am = &acl_main;
+  vlib_node_t *n;
+
+  n = vlib_get_node_by_name (vm, (u8 *) "l2-input-classify");
+  am->l2_input_classify_next_acl =
+    vlib_node_add_next_with_slot (vm, n->index, acl_in_node.index, ~0);
+  n = vlib_get_node_by_name (vm, (u8 *) "l2-output-classify");
+  am->l2_output_classify_next_acl =
+    vlib_node_add_next_with_slot (vm, n->index, acl_out_node.index, ~0);
+
+  feat_bitmap_init_next_nodes (vm, acl_in_node.index, L2INPUT_N_FEAT,
+			       l2input_get_feat_names (),
+			       am->acl_in_node_input_next_node_index);
+
+  memset (&am->acl_in_ip4_match_next[0], 0,
+	  sizeof (am->acl_in_ip4_match_next));
+  memset (&am->acl_in_ip6_match_next[0], 0,
+	  sizeof (am->acl_in_ip6_match_next));
+  memset (&am->acl_out_ip4_match_next[0], 0,
+	  sizeof (am->acl_out_ip4_match_next));
+  memset (&am->acl_out_ip6_match_next[0], 0,
+	  sizeof (am->acl_out_ip6_match_next));
+  am->n_match_actions = 0;
+
+  register_match_action_nexts (0, 0, 0, 0);	/* drop */
+  register_match_action_nexts (~0, ~0, ~0, ~0);	/* permit */
+  register_match_action_nexts (ACL_IN_L2S_INPUT_IP4_ADD, ACL_IN_L2S_INPUT_IP6_ADD, ACL_OUT_L2S_OUTPUT_IP4_ADD, ACL_OUT_L2S_OUTPUT_IP6_ADD);	/* permit + create session */
+}
+
+
+
+static clib_error_t *
+acl_init (vlib_main_t * vm)
+{
+  acl_main_t *am = &acl_main;
+  clib_error_t *error = 0;
+  memset (am, 0, sizeof (*am));
+  am->vlib_main = vm;
+  am->vnet_main = vnet_get_main ();
+
+  u8 *name = format (0, "acl_%08x%c", api_version, 0);
+
+  /* Ask for a correctly-sized block of API message decode slots */
+  am->msg_id_base = vl_msg_api_get_msg_ids ((char *) name,
+					    VL_MSG_FIRST_AVAILABLE);
+
+  error = acl_plugin_api_hookup (vm);
+  acl_setup_nodes ();
+
+ /* Add our API messages to the global name_crc hash table */
+  setup_message_id_table (am, &api_main);
+
+  vec_free (name);
+
+  return error;
+}
+
+VLIB_INIT_FUNCTION (acl_init);
diff --git a/plugins/acl-plugin/acl/acl.h b/plugins/acl-plugin/acl/acl.h
new file mode 100644
index 00000000000..afc9b289cee
--- /dev/null
+++ b/plugins/acl-plugin/acl/acl.h
@@ -0,0 +1,148 @@
+/*
+ * Copyright (c) 2016 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.
+ */
+#ifndef included_acl_h
+#define included_acl_h
+
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/l2/l2_output.h>
+
+
+#include <vppinfra/hash.h>
+#include <vppinfra/error.h>
+#include <vppinfra/elog.h>
+
+#define  ACL_PLUGIN_VERSION_MAJOR 1
+#define  ACL_PLUGIN_VERSION_MINOR 1
+
+extern vlib_node_registration_t acl_in_node;
+extern vlib_node_registration_t acl_out_node;
+
+void input_acl_packet_match(u32 sw_if_index, vlib_buffer_t * b0, u32 *nextp, u32 *acl_match_p, u32 *rule_match_p, u32 *trace_bitmap);
+void output_acl_packet_match(u32 sw_if_index, vlib_buffer_t * b0, u32 *nextp, u32 *acl_match_p, u32 *rule_match_p, u32 *trace_bitmap);
+
+enum address_e { IP4, IP6 };
+typedef struct
+{
+  enum address_e type;
+  union {
+    ip6_address_t ip6;
+    ip4_address_t ip4;
+  } addr;
+} address_t;
+
+/*
+ * ACL rules
+ */
+typedef struct
+{
+  u8 is_permit;
+  u8 is_ipv6;
+  ip46_address_t src;
+  u8 src_prefixlen;
+  ip46_address_t dst;
+  u8 dst_prefixlen;
+  u8 proto;
+  u16 src_port_or_type_first;
+  u16 src_port_or_type_last;
+  u16 dst_port_or_code_first;
+  u16 dst_port_or_code_last;
+  u8 tcp_flags_value;
+  u8 tcp_flags_mask;
+} acl_rule_t;
+
+typedef struct
+{
+  u8 is_permit;
+  u8 is_ipv6;
+  u8 src_mac[6];
+  u8 src_mac_mask[6];
+  ip46_address_t src_ip_addr;
+  u8 src_prefixlen;
+} macip_acl_rule_t;
+
+/*
+ * ACL
+ */
+typedef struct
+{
+  u8 tag[64];
+  u32 count;
+  acl_rule_t *rules;
+} acl_list_t;
+
+typedef struct
+{
+  u8 tag[64];
+  u32 count;
+  macip_acl_rule_t *rules;
+  /* References to the classifier tables that will enforce the rules */
+  u32 ip4_table_index;
+  u32 ip6_table_index;
+  u32 l2_table_index;
+} macip_acl_list_t;
+
+typedef struct {
+  /* API message ID base */
+  u16 msg_id_base;
+
+  acl_list_t *acls;	/* Pool of ACLs */
+  macip_acl_list_t *macip_acls;	/* Pool of MAC-IP ACLs */
+
+  /* ACLs associated with interfaces */
+  u32 **input_acl_vec_by_sw_if_index;
+  u32 **output_acl_vec_by_sw_if_index;
+
+  /*
+   * Classify tables used to grab the packets for the ACL check,
+   * and serving as the 5-tuple session tables at the same time
+   */
+  u32 *acl_ip4_input_classify_table_by_sw_if_index;
+  u32 *acl_ip6_input_classify_table_by_sw_if_index;
+  u32 *acl_ip4_output_classify_table_by_sw_if_index;
+  u32 *acl_ip6_output_classify_table_by_sw_if_index;
+
+  /* MACIP (input) ACLs associated with the interfaces */
+  u32 *macip_acl_by_sw_if_index;
+
+  /* next indices for our nodes in the l2-classify tables */
+  u32 l2_input_classify_next_acl;
+  u32 l2_output_classify_next_acl;
+
+  /* next node indices for feature bitmap */
+  u32 acl_in_node_input_next_node_index[32];
+  /* the respective thing for the output feature */
+  l2_output_next_nodes_st acl_out_output_next_nodes;
+
+  /* ACL match actions (must be coherent across in/out ACLs to next indices (can differ) */
+
+  u32 acl_in_ip4_match_next[256];
+  u32 acl_in_ip6_match_next[256];
+  u32 acl_out_ip4_match_next[256];
+  u32 acl_out_ip6_match_next[256];
+  u32 n_match_actions;
+
+
+  /* convenience */
+  vlib_main_t * vlib_main;
+  vnet_main_t * vnet_main;
+  ethernet_main_t * ethernet_main;
+} acl_main_t;
+
+extern acl_main_t acl_main;
+
+
+#endif
diff --git a/plugins/acl-plugin/acl/acl_all_api_h.h b/plugins/acl-plugin/acl/acl_all_api_h.h
new file mode 100644
index 00000000000..96eca56d31c
--- /dev/null
+++ b/plugins/acl-plugin/acl/acl_all_api_h.h
@@ -0,0 +1,321 @@
+/*
+ * Copyright (c) 2016 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 the generated file, see BUILT_SOURCES in Makefile.am */
+#include <acl/acl.api.h>
+
+#ifdef vl_printfun
+
+#ifdef LP64
+#define _uword_fmt "%lld"
+#define _uword_cast (long long)
+#else
+#define _uword_fmt "%ld"
+#define _uword_cast long
+#endif
+
+static inline void *
+vl_api_acl_rule_t_print (vl_api_acl_rule_t * a, void *handle)
+{
+  vl_print (handle, "vl_api_acl_rule_t:\n");
+  vl_print (handle, "is_permit: %u\n", (unsigned) a->is_permit);
+  vl_print (handle, "is_ipv6: %u\n", (unsigned) a->is_ipv6);
+  {
+    int _i;
+    for (_i = 0; _i < 16; _i++)
+      {
+        vl_print (handle, "src_ip_addr[%d]: %u\n", _i, a->src_ip_addr[_i]);
+      }
+  }
+  vl_print (handle, "src_ip_prefix_len: %u\n",
+            (unsigned) a->src_ip_prefix_len);
+  {
+    int _i;
+    for (_i = 0; _i < 16; _i++)
+      {
+        vl_print (handle, "dst_ip_addr[%d]: %u\n", _i, a->dst_ip_addr[_i]);
+      }
+  }
+  vl_print (handle, "dst_ip_prefix_len: %u\n",
+            (unsigned) a->dst_ip_prefix_len);
+  vl_print (handle, "proto: %u\n", (unsigned) a->proto);
+  vl_print (handle, "srcport_or_icmptype_first: %u\n",
+            (unsigned) a->srcport_or_icmptype_first);
+  vl_print (handle, "srcport_or_icmptype_last: %u\n",
+            (unsigned) a->srcport_or_icmptype_last);
+  vl_print (handle, "dstport_or_icmpcode_first: %u\n",
+            (unsigned) a->dstport_or_icmpcode_first);
+  vl_print (handle, "dstport_or_icmpcode_last: %u\n",
+            (unsigned) a->dstport_or_icmpcode_last);
+  vl_print (handle, "tcp_flags_mask: %u\n", (unsigned) a->tcp_flags_mask);
+  vl_print (handle, "tcp_flags_value: %u\n", (unsigned) a->tcp_flags_value);
+  return handle;
+}
+
+static inline void *
+vl_api_acl_add_replace_t_print (vl_api_acl_add_replace_t * a, void *handle)
+{
+  int i;
+  vl_print (handle, "vl_api_acl_add_replace_t:\n");
+  vl_print (handle, "_vl_msg_id: %u\n", (unsigned) a->_vl_msg_id);
+  vl_print (handle, "client_index: %u\n", (unsigned) a->client_index);
+  vl_print (handle, "context: %u\n", (unsigned) a->context);
+  vl_print (handle, "acl_index: %u\n", (unsigned) a->acl_index);
+  vl_print (handle, "count: %u\n", (unsigned) a->count);
+  vl_print (handle, "r ----- \n");
+  for (i = 0; i < a->count; i++)
+    {
+      vl_print (handle, "  r[%d]:\n", i);
+      vl_api_acl_rule_t_print (&a->r[i], handle);
+    }
+  vl_print (handle, "r ----- END \n");
+  return handle;
+}
+
+
+static inline void *vl_api_acl_details_t_print (vl_api_acl_details_t *a,void *handle)
+{
+    vl_print(handle, "vl_api_acl_details_t:\n");
+    vl_print(handle, "_vl_msg_id: %u\n", (unsigned) a->_vl_msg_id);
+    vl_print(handle, "context: %u\n", (unsigned) a->context);
+    vl_print(handle, "acl_index: %u\n", (unsigned) a->acl_index);
+    {
+        int _i;
+        for (_i = 0; _i < 64; _i++) {
+            vl_print(handle, "tag[%d]: %u\n", _i, a->tag[_i]);
+        }
+    }
+    vl_print(handle, "count: %u\n", (unsigned) a->count);
+    vl_print(handle, "r ----- \n");
+    // FIXME vl_api_acl_rule_t_print(&a->r, handle);
+    vl_print(handle, "r ----- END \n");
+    return handle;
+}
+
+static inline void *
+vl_api_macip_acl_rule_t_print (vl_api_macip_acl_rule_t * a, void *handle)
+{
+  vl_print (handle, "vl_api_macip_acl_rule_t:\n");
+  vl_print (handle, "is_permit: %u\n", (unsigned) a->is_permit);
+  vl_print (handle, "is_ipv6: %u\n", (unsigned) a->is_ipv6);
+  {
+    int _i;
+    for (_i = 0; _i < 6; _i++)
+      {
+        vl_print (handle, "src_mac[%d]: %u\n", _i, a->src_mac[_i]);
+      }
+  }
+  {
+    int _i;
+    for (_i = 0; _i < 6; _i++)
+      {
+        vl_print (handle, "src_mac_mask[%d]: %u\n", _i, a->src_mac_mask[_i]);
+      }
+  }
+  {
+    int _i;
+    for (_i = 0; _i < 16; _i++)
+      {
+        vl_print (handle, "src_ip_addr[%d]: %u\n", _i, a->src_ip_addr[_i]);
+      }
+  }
+  vl_print (handle, "src_ip_prefix_len: %u\n",
+            (unsigned) a->src_ip_prefix_len);
+  return handle;
+}
+
+static inline void *
+vl_api_macip_acl_add_t_print (vl_api_macip_acl_add_t * a, void *handle)
+{
+  int i;
+  vl_print (handle, "vl_api_macip_acl_add_t:\n");
+  vl_print (handle, "_vl_msg_id: %u\n", (unsigned) a->_vl_msg_id);
+  vl_print (handle, "client_index: %u\n", (unsigned) a->client_index);
+  vl_print (handle, "context: %u\n", (unsigned) a->context);
+  vl_print (handle, "count: %u\n", (unsigned) a->count);
+  vl_print (handle, "r ----- \n");
+  for (i = 0; i < a->count; i++)
+    {
+      vl_print (handle, "  r[%d]:\n", i);
+      vl_api_macip_acl_rule_t_print (&a->r[i], handle);
+    }
+  vl_print (handle, "r ----- END \n");
+  return handle;
+}
+
+static inline void *vl_api_macip_acl_details_t_print (vl_api_macip_acl_details_t *a,void *handle)
+{
+    int i;
+    vl_print(handle, "vl_api_macip_acl_details_t:\n");
+    vl_print(handle, "_vl_msg_id: %u\n", (unsigned) a->_vl_msg_id);
+    vl_print(handle, "context: %u\n", (unsigned) a->context);
+    vl_print(handle, "acl_index: %u\n", (unsigned) a->acl_index);
+    {
+        int _i;
+        for (_i = 0; _i < 64; _i++) {
+            vl_print(handle, "tag[%d]: %u\n", _i, a->tag[_i]);
+        }
+    }
+    vl_print(handle, "count: %u\n", (unsigned) a->count);
+    vl_print(handle, "r ----- \n");
+    for (i = 0; i < a->count; i++)
+      {
+        vl_print (handle, "  r[%d]:\n", i);
+        vl_api_macip_acl_rule_t_print (&a->r[i], handle);
+      }
+    vl_print(handle, "r ----- END \n");
+    return handle;
+}
+
+#endif /* vl_printfun */
+
+
+#ifdef vl_endianfun
+
+#undef clib_net_to_host_uword
+#ifdef LP64
+#define clib_net_to_host_uword clib_net_to_host_u64
+#else
+#define clib_net_to_host_uword clib_net_to_host_u32
+#endif
+
+/*
+ * Manual endian/print functions created by copypasting the automatically
+ * generated ones with small required adjustments. Appears the codegen
+ * can't make code to print the contents of custom-type array.
+ */
+
+static inline void
+vl_api_acl_rule_t_endian (vl_api_acl_rule_t * a)
+{
+  /* a->is_permit = a->is_permit (no-op) */
+  /* a->is_ipv6 = a->is_ipv6 (no-op) */
+  /* a->src_ip_addr[0..15] = a->src_ip_addr[0..15] (no-op) */
+  /* a->src_ip_prefix_len = a->src_ip_prefix_len (no-op) */
+  /* a->dst_ip_addr[0..15] = a->dst_ip_addr[0..15] (no-op) */
+  /* a->dst_ip_prefix_len = a->dst_ip_prefix_len (no-op) */
+  /* a->proto = a->proto (no-op) */
+  a->srcport_or_icmptype_first =
+    clib_net_to_host_u16 (a->srcport_or_icmptype_first);
+  a->srcport_or_icmptype_last =
+    clib_net_to_host_u16 (a->srcport_or_icmptype_last);
+  a->dstport_or_icmpcode_first =
+    clib_net_to_host_u16 (a->dstport_or_icmpcode_first);
+  a->dstport_or_icmpcode_last =
+    clib_net_to_host_u16 (a->dstport_or_icmpcode_last);
+  /* a->tcp_flags_mask = a->tcp_flags_mask (no-op) */
+  /* a->tcp_flags_value = a->tcp_flags_value (no-op) */
+}
+
+static inline void
+vl_api_acl_add_replace_t_endian (vl_api_acl_add_replace_t * a)
+{
+  int i;
+  a->_vl_msg_id = clib_net_to_host_u16 (a->_vl_msg_id);
+  a->client_index = clib_net_to_host_u32 (a->client_index);
+  a->context = clib_net_to_host_u32 (a->context);
+  a->acl_index = clib_net_to_host_u32 (a->acl_index);
+  a->count = clib_net_to_host_u32 (a->count);
+  for (i = 0; i < a->count; i++)
+    {
+      vl_api_acl_rule_t_endian (&a->r[i]);
+    }
+}
+
+static inline void vl_api_acl_details_t_endian (vl_api_acl_details_t *a)
+{
+    int i;
+    a->_vl_msg_id = clib_net_to_host_u16(a->_vl_msg_id);
+    a->context = clib_net_to_host_u32(a->context);
+    a->acl_index = clib_net_to_host_u32(a->acl_index);
+    /* a->tag[0..63] = a->tag[0..63] (no-op) */
+    a->count = clib_net_to_host_u32(a->count);
+    for (i = 0; i < a->count; i++)
+    {
+      vl_api_acl_rule_t_endian (&a->r[i]);
+    }
+}
+
+static inline void vl_api_acl_interface_list_details_t_endian (vl_api_acl_interface_list_details_t *a)
+{
+    int i;
+    a->_vl_msg_id = clib_net_to_host_u16(a->_vl_msg_id);
+    a->context = clib_net_to_host_u32(a->context);
+    a->sw_if_index = clib_net_to_host_u32(a->sw_if_index);
+    /* a->count = a->count (no-op) */
+    /* a->n_input = a->n_input (no-op) */
+    for(i=0; i<a->count; i++) {
+      a->acls[i] = clib_net_to_host_u32(a->acls[i]);
+    }
+}
+
+static inline void vl_api_acl_interface_set_acl_list_t_endian (vl_api_acl_interface_set_acl_list_t *a)
+{
+    int i;
+    a->_vl_msg_id = clib_net_to_host_u16(a->_vl_msg_id);
+    a->client_index = clib_net_to_host_u32(a->client_index);
+    a->context = clib_net_to_host_u32(a->context);
+    a->sw_if_index = clib_net_to_host_u32(a->sw_if_index);
+    /* a->count = a->count (no-op) */
+    /* a->n_input = a->n_input (no-op) */
+    for(i=0; i<a->count; i++) {
+      a->acls[i] = clib_net_to_host_u32(a->acls[i]);
+    }
+}
+
+static inline void
+vl_api_macip_acl_rule_t_endian (vl_api_macip_acl_rule_t * a)
+{
+  /* a->is_permit = a->is_permit (no-op) */
+  /* a->is_ipv6 = a->is_ipv6 (no-op) */
+  /* a->src_mac[0..5] = a->src_mac[0..5] (no-op) */
+  /* a->src_mac_mask[0..5] = a->src_mac_mask[0..5] (no-op) */
+  /* a->src_ip_addr[0..15] = a->src_ip_addr[0..15] (no-op) */
+  /* a->src_ip_prefix_len = a->src_ip_prefix_len (no-op) */
+}
+
+static inline void
+vl_api_macip_acl_add_t_endian (vl_api_macip_acl_add_t * a)
+{
+  int i;
+  a->_vl_msg_id = clib_net_to_host_u16 (a->_vl_msg_id);
+  a->client_index = clib_net_to_host_u32 (a->client_index);
+  a->context = clib_net_to_host_u32 (a->context);
+  a->count = clib_net_to_host_u32 (a->count);
+  for (i = 0; i < a->count; i++)
+    {
+      vl_api_macip_acl_rule_t_endian (&a->r[i]);
+    }
+}
+
+static inline void vl_api_macip_acl_details_t_endian (vl_api_macip_acl_details_t *a)
+{
+    int i;
+    a->_vl_msg_id = clib_net_to_host_u16(a->_vl_msg_id);
+    a->context = clib_net_to_host_u32(a->context);
+    a->acl_index = clib_net_to_host_u32(a->acl_index);
+    /* a->tag[0..63] = a->tag[0..63] (no-op) */
+    a->count = clib_net_to_host_u32(a->count);
+    for (i = 0; i < a->count; i++)
+      {
+        vl_api_macip_acl_rule_t_endian (&a->r[i]);
+      }
+}
+
+
+
+
+#endif /* vl_printfun */
+
+
diff --git a/plugins/acl-plugin/acl/acl_msg_enum.h b/plugins/acl-plugin/acl/acl_msg_enum.h
new file mode 100644
index 00000000000..14d8b48c207
--- /dev/null
+++ b/plugins/acl-plugin/acl/acl_msg_enum.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2016 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.
+ */
+#ifndef included_acl_msg_enum_h
+#define included_acl_msg_enum_h
+
+#include <vppinfra/byte_order.h>
+
+#define vl_msg_id(n,h) n,
+typedef enum {
+#include <acl/acl_all_api_h.h>
+    /* We'll want to know how many messages IDs we need... */
+    VL_MSG_FIRST_AVAILABLE,
+} vl_msg_id_t;
+#undef vl_msg_id
+
+#endif
diff --git a/plugins/acl-plugin/acl/acl_test.c b/plugins/acl-plugin/acl/acl_test.c
new file mode 100644
index 00000000000..a0e413e16da
--- /dev/null
+++ b/plugins/acl-plugin/acl/acl_test.c
@@ -0,0 +1,1024 @@
+/*
+ * Copyright (c) 2015 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.
+ */
+/*
+ *------------------------------------------------------------------
+ * acl_test.c - test harness plugin
+ *------------------------------------------------------------------
+ */
+
+#include <vat/vat.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vlibsocket/api.h>
+#include <vppinfra/error.h>
+#include <vnet/ip/ip.h>
+#include <arpa/inet.h>
+
+uword unformat_sw_if_index (unformat_input_t * input, va_list * args);
+
+/* Declare message IDs */
+#include <acl/acl_msg_enum.h>
+
+/* define message structures */
+#define vl_typedefs
+#include <acl/acl_all_api_h.h>
+#undef vl_typedefs
+
+/* define message structures */
+#define vl_endianfun
+#include <acl/acl_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...)
+#define vl_printfun
+#include <acl/acl_all_api_h.h>
+#undef vl_printfun
+
+/* Get the API version number. */
+#define vl_api_version(n,v) static u32 api_version=(v);
+#include <acl/acl_all_api_h.h>
+#undef vl_api_version
+
+typedef struct {
+    /* API message ID base */
+    u16 msg_id_base;
+    vat_main_t *vat_main;
+} acl_test_main_t;
+
+acl_test_main_t acl_test_main;
+
+#define foreach_standard_reply_retval_handler   \
+_(acl_del_reply) \
+_(acl_interface_add_del_reply) \
+_(macip_acl_interface_add_del_reply) \
+_(acl_interface_set_acl_list_reply) \
+_(macip_acl_del_reply)
+
+#define foreach_reply_retval_aclindex_handler  \
+_(acl_add_replace_reply) \
+_(macip_acl_add_reply)
+
+#define _(n)                                            \
+    static void vl_api_##n##_t_handler                  \
+    (vl_api_##n##_t * mp)                               \
+    {                                                   \
+        vat_main_t * vam = acl_test_main.vat_main;   \
+        i32 retval = ntohl(mp->retval);                 \
+        if (vam->async_mode) {                          \
+            vam->async_errors += (retval < 0);          \
+        } else {                                        \
+            vam->retval = retval;                       \
+            vam->result_ready = 1;                      \
+        }                                               \
+    }
+foreach_standard_reply_retval_handler;
+#undef _
+
+#define _(n)                                            \
+    static void vl_api_##n##_t_handler                  \
+    (vl_api_##n##_t * mp)                               \
+    {                                                   \
+        vat_main_t * vam = acl_test_main.vat_main;   \
+        i32 retval = ntohl(mp->retval);                 \
+        if (vam->async_mode) {                          \
+            vam->async_errors += (retval < 0);          \
+        } else {                                        \
+            clib_warning("ACL index: %d", ntohl(mp->acl_index)); \
+            vam->retval = retval;                       \
+            vam->result_ready = 1;                      \
+        }                                               \
+    }
+foreach_reply_retval_aclindex_handler;
+#undef _
+
+/* These two ought to be in a library somewhere but they aren't */
+static uword
+my_unformat_mac_address (unformat_input_t * input, va_list * args)
+{
+  u8 *a = va_arg (*args, u8 *);
+  return unformat (input, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3],
+                   &a[4], &a[5]);
+}
+
+static u8 *
+my_format_mac_address (u8 * s, va_list * args)
+{
+  u8 *a = va_arg (*args, u8 *);
+  return format (s, "%02x:%02x:%02x:%02x:%02x:%02x",
+                 a[0], a[1], a[2], a[3], a[4], a[5]);
+}
+
+
+
+static void vl_api_acl_plugin_get_version_reply_t_handler
+    (vl_api_acl_plugin_get_version_reply_t * mp)
+    {
+        vat_main_t * vam = acl_test_main.vat_main;
+        clib_warning("ACL plugin version: %d.%d", ntohl(mp->major), ntohl(mp->minor));
+        vam->result_ready = 1;
+    }
+
+static void vl_api_acl_interface_list_details_t_handler
+    (vl_api_acl_interface_list_details_t * mp)
+    {
+        int i;
+        vat_main_t * vam = acl_test_main.vat_main;
+        u8 *out = 0;
+        vl_api_acl_interface_list_details_t_endian(mp);
+	out = format(out, "sw_if_index: %d, count: %d, n_input: %d\n", mp->sw_if_index, mp->count, mp->n_input);
+        out = format(out, "   input ");
+	for(i=0; i<mp->count; i++) {
+          out = format(out, "%d ", mp->acls[i]);
+          if (i == mp->n_input-1)
+            out = format(out, "\n  output ");
+	}
+        out = format(out, "\n");
+        clib_warning("%s", out);
+        vec_free(out);
+        vam->result_ready = 1;
+    }
+
+
+static inline u8 *
+vl_api_acl_rule_t_pretty_format (u8 *out, vl_api_acl_rule_t * a)
+{
+  int af = a->is_ipv6 ? AF_INET6 : AF_INET;
+  u8 src[INET6_ADDRSTRLEN];
+  u8 dst[INET6_ADDRSTRLEN];
+  inet_ntop(af, a->src_ip_addr, (void *)src, sizeof(src));
+  inet_ntop(af, a->dst_ip_addr, (void *)dst, sizeof(dst));
+
+  out = format(out, "%s action %d src %s/%d dst %s/%d proto %d sport %d-%d dport %d-%d tcpflags %d %d",
+                     a->is_ipv6 ? "ipv6" : "ipv4", a->is_permit,
+                     src, a->src_ip_prefix_len,
+                     dst, a->dst_ip_prefix_len,
+                     a->proto,
+                     a->srcport_or_icmptype_first, a->srcport_or_icmptype_last,
+	             a->dstport_or_icmpcode_first, a->dstport_or_icmpcode_last,
+                     a->tcp_flags_mask, a->tcp_flags_value);
+  return(out);
+}
+
+
+
+static void vl_api_acl_details_t_handler
+    (vl_api_acl_details_t * mp)
+    {
+        int i;
+        vat_main_t * vam = acl_test_main.vat_main;
+        vl_api_acl_details_t_endian(mp);
+        u8 *out = 0;
+        out = format(0, "acl_index: %d, count: %d\n   tag {%s}\n", mp->acl_index, mp->count, mp->tag);
+	for(i=0; i<mp->count; i++) {
+          out = format(out, "   ");
+          out = vl_api_acl_rule_t_pretty_format(out, &mp->r[i]);
+          out = format(out, "%s\n", i<mp->count-1 ? "," : "");
+	}
+        clib_warning("%s", out);
+        vec_free(out);
+        vam->result_ready = 1;
+    }
+
+static inline u8 *
+vl_api_macip_acl_rule_t_pretty_format (u8 *out, vl_api_macip_acl_rule_t * a)
+{
+  int af = a->is_ipv6 ? AF_INET6 : AF_INET;
+  u8 src[INET6_ADDRSTRLEN];
+  inet_ntop(af, a->src_ip_addr, (void *)src, sizeof(src));
+
+  out = format(out, "%s action %d ip %s/%d mac %U mask %U",
+                     a->is_ipv6 ? "ipv6" : "ipv4", a->is_permit,
+                     src, a->src_ip_prefix_len,
+                     my_format_mac_address, a->src_mac,
+                     my_format_mac_address, a->src_mac_mask);
+  return(out);
+}
+
+
+static void vl_api_macip_acl_details_t_handler
+    (vl_api_macip_acl_details_t * mp)
+    {
+        int i;
+        vat_main_t * vam = acl_test_main.vat_main;
+        vl_api_macip_acl_details_t_endian(mp);
+        u8 *out = format(0,"MACIP acl_index: %d, count: %d\n   tag {%s}\n", mp->acl_index, mp->count, mp->tag);
+	for(i=0; i<mp->count; i++) {
+          out = format(out, "   ");
+          out = vl_api_macip_acl_rule_t_pretty_format(out, &mp->r[i]);
+          out = format(out, "%s\n", i<mp->count-1 ? "," : "");
+	}
+        clib_warning("%s", out);
+        vec_free(out);
+        vam->result_ready = 1;
+    }
+
+static void vl_api_macip_acl_interface_get_reply_t_handler
+    (vl_api_macip_acl_interface_get_reply_t * mp)
+    {
+        int i;
+        vat_main_t * vam = acl_test_main.vat_main;
+        u8 *out = format(0, "sw_if_index with MACIP ACL count: %d\n", ntohl(mp->count));
+	for(i=0; i<ntohl(mp->count); i++) {
+          out = format(out, "  macip_acl_interface_add_del sw_if_index %d add acl %d\n", i, ntohl(mp->acls[i]));
+	}
+        out = format(out, "\n");
+        clib_warning("%s", out);
+        vec_free(out);
+        vam->result_ready = 1;
+    }
+
+
+/*
+ * Table of message reply handlers, must include boilerplate handlers
+ * we just generated
+ */
+#define foreach_vpe_api_reply_msg                                       \
+_(ACL_ADD_REPLACE_REPLY, acl_add_replace_reply) \
+_(ACL_DEL_REPLY, acl_del_reply) \
+_(ACL_INTERFACE_ADD_DEL_REPLY, acl_interface_add_del_reply)  \
+_(ACL_INTERFACE_SET_ACL_LIST_REPLY, acl_interface_set_acl_list_reply) \
+_(ACL_INTERFACE_LIST_DETAILS, acl_interface_list_details)  \
+_(ACL_DETAILS, acl_details)  \
+_(MACIP_ACL_ADD_REPLY, macip_acl_add_reply) \
+_(MACIP_ACL_DEL_REPLY, macip_acl_del_reply) \
+_(MACIP_ACL_DETAILS, macip_acl_details)  \
+_(MACIP_ACL_INTERFACE_ADD_DEL_REPLY, macip_acl_interface_add_del_reply)  \
+_(MACIP_ACL_INTERFACE_GET_REPLY, macip_acl_interface_get_reply)  \
+_(ACL_PLUGIN_GET_VERSION_REPLY, acl_plugin_get_version_reply)
+
+/* M: construct, but don't yet send a message */
+
+#define M(T,t)                                                  \
+do {                                                            \
+    vam->result_ready = 0;                                      \
+    mp = vl_msg_api_alloc(sizeof(*mp));                         \
+    memset (mp, 0, sizeof (*mp));                               \
+    mp->_vl_msg_id = ntohs (VL_API_##T + sm->msg_id_base);      \
+    mp->client_index = vam->my_client_index;                    \
+} while(0);
+
+#define M2(T,t,n)                                               \
+do {                                                            \
+    vam->result_ready = 0;                                      \
+    mp = vl_msg_api_alloc(sizeof(*mp)+(n));                     \
+    memset (mp, 0, sizeof (*mp));                               \
+    mp->_vl_msg_id = ntohs (VL_API_##T + sm->msg_id_base);      \
+    mp->client_index = vam->my_client_index;                    \
+} while(0);
+
+/* S: send a message */
+#define S (vl_msg_api_send_shmem (vam->vl_input_queue, (u8 *)&mp))
+
+/* W: wait for results, with timeout */
+#define W                                       \
+do {                                            \
+    timeout = vat_time_now (vam) + 1.0;         \
+                                                \
+    while (vat_time_now (vam) < timeout) {      \
+        if (vam->result_ready == 1) {           \
+            return (vam->retval);               \
+        }                                       \
+    }                                           \
+    return -99;                                 \
+} while(0);
+
+static int api_acl_plugin_get_version (vat_main_t * vam)
+{
+    acl_test_main_t * sm = &acl_test_main;
+    vl_api_acl_plugin_get_version_t * mp;
+    u32 msg_size = sizeof(*mp);
+    f64 timeout;
+
+    vam->result_ready = 0;
+    mp = vl_msg_api_alloc_as_if_client(msg_size);
+    memset (mp, 0, msg_size);
+    mp->_vl_msg_id = ntohs (VL_API_ACL_PLUGIN_GET_VERSION + sm->msg_id_base);
+    mp->client_index = vam->my_client_index;
+
+    /* send it... */
+    S;
+
+    /* Wait for a reply... */
+    W;
+
+    return 0;
+}
+
+static int api_macip_acl_interface_get (vat_main_t * vam)
+{
+    acl_test_main_t * sm = &acl_test_main;
+    vl_api_acl_plugin_get_version_t * mp;
+    u32 msg_size = sizeof(*mp);
+    f64 timeout;
+
+    vam->result_ready = 0;
+    mp = vl_msg_api_alloc_as_if_client(msg_size);
+    memset (mp, 0, msg_size);
+    mp->_vl_msg_id = ntohs (VL_API_MACIP_ACL_INTERFACE_GET + sm->msg_id_base);
+    mp->client_index = vam->my_client_index;
+
+    /* send it... */
+    S;
+
+    /* Wait for a reply... */
+    W;
+
+    return 0;
+}
+
+#define vec_validate_acl_rules(v, idx) \
+  do {                                 \
+    if (vec_len(v) < idx+1) {  \
+      vec_validate(v, idx); \
+      v[idx].is_permit = 0x1; \
+      v[idx].srcport_or_icmptype_last = 0xffff; \
+      v[idx].dstport_or_icmpcode_last = 0xffff; \
+    } \
+  } while (0)
+
+
+static int api_acl_add_replace (vat_main_t * vam)
+{
+    acl_test_main_t * sm = &acl_test_main;
+    unformat_input_t * i = vam->input;
+    f64 timeout;
+    vl_api_acl_add_replace_t * mp;
+    u32 acl_index = ~0;
+    u32 msg_size = sizeof (*mp); /* without the rules */
+
+    vl_api_acl_rule_t *rules = 0;
+    int rule_idx = 0;
+    int n_rules = 0;
+    u32 proto = 0;
+    u32 port1 = 0;
+    u32 port2 = 0;
+    u32 action = 0;
+    u32 tcpflags, tcpmask;
+    u32 src_prefix_length = 0, dst_prefix_length = 0;
+    ip4_address_t src_v4address, dst_v4address;
+    ip6_address_t src_v6address, dst_v6address;
+    u8 *tag = 0;
+
+    if (!unformat (i, "%d", &acl_index)) {
+	/* Just assume -1 */
+    }
+
+    while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT)
+    {
+        if (unformat (i, "ipv6"))
+          {
+            vec_validate_acl_rules(rules, rule_idx);
+            rules[rule_idx].is_ipv6 = 1;
+          }
+        else if (unformat (i, "ipv4"))
+          {
+            vec_validate_acl_rules(rules, rule_idx);
+            rules[rule_idx].is_ipv6 = 0;
+          }
+        else if (unformat (i, "permit+reflect"))
+          {
+            vec_validate_acl_rules(rules, rule_idx);
+            rules[rule_idx].is_permit = 2;
+          }
+        else if (unformat (i, "permit"))
+          {
+            vec_validate_acl_rules(rules, rule_idx);
+            rules[rule_idx].is_permit = 1;
+          }
+        else if (unformat (i, "action %d", &action))
+          {
+            vec_validate_acl_rules(rules, rule_idx);
+            rules[rule_idx].is_permit = action;
+          }
+        else if (unformat (i, "src %U/%d",
+         unformat_ip4_address, &src_v4address, &src_prefix_length))
+          {
+            vec_validate_acl_rules(rules, rule_idx);
+            memcpy (rules[rule_idx].src_ip_addr, &src_v4address, 4);
+            rules[rule_idx].src_ip_prefix_len = src_prefix_length;
+            rules[rule_idx].is_ipv6 = 0;
+          }
+        else if (unformat (i, "src %U/%d",
+         unformat_ip6_address, &src_v6address, &src_prefix_length))
+          {
+            vec_validate_acl_rules(rules, rule_idx);
+            memcpy (rules[rule_idx].src_ip_addr, &src_v6address, 16);
+            rules[rule_idx].src_ip_prefix_len = src_prefix_length;
+            rules[rule_idx].is_ipv6 = 1;
+          }
+        else if (unformat (i, "dst %U/%d",
+         unformat_ip4_address, &dst_v4address, &dst_prefix_length))
+          {
+            vec_validate_acl_rules(rules, rule_idx);
+            memcpy (rules[rule_idx].dst_ip_addr, &dst_v4address, 4);
+            rules[rule_idx].dst_ip_prefix_len = dst_prefix_length;
+            rules[rule_idx].is_ipv6 = 0;
+          }
+        else if (unformat (i, "dst %U/%d",
+         unformat_ip6_address, &dst_v6address, &dst_prefix_length))
+          {
+            vec_validate_acl_rules(rules, rule_idx);
+            memcpy (rules[rule_idx].dst_ip_addr, &dst_v6address, 16);
+            rules[rule_idx].dst_ip_prefix_len = dst_prefix_length;
+            rules[rule_idx].is_ipv6 = 1;
+          }
+        else if (unformat (i, "sport %d-%d", &port1, &port2))
+          {
+            vec_validate_acl_rules(rules, rule_idx);
+            rules[rule_idx].srcport_or_icmptype_first = htons(port1);
+            rules[rule_idx].srcport_or_icmptype_last = htons(port2);
+          }
+        else if (unformat (i, "sport %d", &port1))
+          {
+            vec_validate_acl_rules(rules, rule_idx);
+            rules[rule_idx].srcport_or_icmptype_first = htons(port1);
+            rules[rule_idx].srcport_or_icmptype_last = htons(port1);
+          }
+        else if (unformat (i, "dport %d-%d", &port1, &port2))
+          {
+            vec_validate_acl_rules(rules, rule_idx);
+            rules[rule_idx].dstport_or_icmpcode_first = htons(port1);
+            rules[rule_idx].dstport_or_icmpcode_last = htons(port2);
+          }
+        else if (unformat (i, "dport %d", &port1))
+          {
+            vec_validate_acl_rules(rules, rule_idx);
+            rules[rule_idx].dstport_or_icmpcode_first = htons(port1);
+            rules[rule_idx].dstport_or_icmpcode_last = htons(port1);
+          }
+        else if (unformat (i, "tcpflags %d %d", &tcpflags, &tcpmask))
+          {
+            vec_validate_acl_rules(rules, rule_idx);
+            rules[rule_idx].tcp_flags_value = tcpflags;
+            rules[rule_idx].tcp_flags_mask = tcpmask;
+          }
+        else if (unformat (i, "proto %d", &proto))
+          {
+            vec_validate_acl_rules(rules, rule_idx);
+            rules[rule_idx].proto = proto;
+          }
+        else if (unformat (i, "tag %s", &tag))
+          {
+          }
+        else if (unformat (i, ","))
+          {
+            rule_idx++;
+            vec_validate_acl_rules(rules, rule_idx);
+          }
+        else
+    break;
+    }
+
+    /* Construct the API message */
+    vam->result_ready = 0;
+
+    if(rules)
+      n_rules = vec_len(rules);
+    else
+      n_rules = 0;
+
+    msg_size += n_rules*sizeof(rules[0]);
+
+    mp = vl_msg_api_alloc_as_if_client(msg_size);
+    memset (mp, 0, msg_size);
+    mp->_vl_msg_id = ntohs (VL_API_ACL_ADD_REPLACE + sm->msg_id_base);
+    mp->client_index = vam->my_client_index;
+    if (n_rules > 0)
+      clib_memcpy(mp->r, rules, n_rules*sizeof (vl_api_acl_rule_t));
+    if (tag)
+      {
+        if (vec_len(tag) >= sizeof(mp->tag))
+          {
+            tag[sizeof(mp->tag)-1] = 0;
+            _vec_len(tag) = sizeof(mp->tag);
+          }
+        clib_memcpy(mp->tag, tag, vec_len(tag));
+        vec_free(tag);
+      }
+    mp->acl_index = ntohl(acl_index);
+    mp->count = htonl(n_rules);
+
+    /* send it... */
+    S;
+
+    /* Wait for a reply... */
+    W;
+}
+
+static int api_acl_del (vat_main_t * vam)
+{
+    acl_test_main_t * sm = &acl_test_main;
+    unformat_input_t * i = vam->input;
+    f64 timeout;
+    vl_api_acl_del_t * mp;
+    u32 acl_index = ~0;
+
+    if (!unformat (i, "%d", &acl_index)) {
+      errmsg ("missing acl index\n");
+      return -99;
+    }
+
+    /* Construct the API message */
+    M(ACL_DEL, acl_del);
+    mp->acl_index = ntohl(acl_index);
+
+    /* send it... */
+    S;
+
+    /* Wait for a reply... */
+    W;
+}
+
+static int api_macip_acl_del (vat_main_t * vam)
+{
+    acl_test_main_t * sm = &acl_test_main;
+    unformat_input_t * i = vam->input;
+    f64 timeout;
+    vl_api_acl_del_t * mp;
+    u32 acl_index = ~0;
+
+    if (!unformat (i, "%d", &acl_index)) {
+      errmsg ("missing acl index\n");
+      return -99;
+    }
+
+    /* Construct the API message */
+    M(MACIP_ACL_DEL, acl_del);
+    mp->acl_index = ntohl(acl_index);
+
+    /* send it... */
+    S;
+
+    /* Wait for a reply... */
+    W;
+}
+
+static int api_acl_interface_add_del (vat_main_t * vam)
+{
+    acl_test_main_t * sm = &acl_test_main;
+    unformat_input_t * i = vam->input;
+    f64 timeout;
+    vl_api_acl_interface_add_del_t * mp;
+    u32 sw_if_index = ~0;
+    u32 acl_index = ~0;
+    u8 is_input = 0;
+    u8 is_add = 0;
+
+//    acl_interface_add_del <intfc> | sw_if_index <if-idx> acl_index <acl-idx> [out] [del]
+
+    while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT)
+    {
+        if (unformat (i, "%d", &acl_index))
+    ;
+        else
+    break;
+    }
+
+
+    /* Parse args required to build the message */
+    while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT) {
+        if (unformat (i, "%U", unformat_sw_if_index, vam, &sw_if_index))
+            ;
+        else if (unformat (i, "sw_if_index %d", &sw_if_index))
+            ;
+        else if (unformat (i, "add"))
+            is_add = 1;
+        else if (unformat (i, "del"))
+            is_add = 0;
+        else if (unformat (i, "acl %d", &acl_index))
+            ;
+        else if (unformat (i, "input"))
+            is_input = 1;
+        else if (unformat (i, "output"))
+            is_input = 0;
+        else
+            break;
+    }
+
+    if (sw_if_index == ~0) {
+        errmsg ("missing interface name / explicit sw_if_index number \n");
+        return -99;
+    }
+
+    if (acl_index == ~0) {
+        errmsg ("missing ACL index\n");
+        return -99;
+    }
+
+
+
+    /* Construct the API message */
+    M(ACL_INTERFACE_ADD_DEL, acl_interface_add_del);
+    mp->acl_index = ntohl(acl_index);
+    mp->sw_if_index = ntohl(sw_if_index);
+    mp->is_add = is_add;
+    mp->is_input = is_input;
+
+    /* send it... */
+    S;
+
+    /* Wait for a reply... */
+    W;
+}
+
+static int api_macip_acl_interface_add_del (vat_main_t * vam)
+{
+    acl_test_main_t * sm = &acl_test_main;
+    unformat_input_t * i = vam->input;
+    f64 timeout;
+    vl_api_macip_acl_interface_add_del_t * mp;
+    u32 sw_if_index = ~0;
+    u32 acl_index = ~0;
+    u8 is_add = 0;
+
+    /* Parse args required to build the message */
+    while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT) {
+        if (unformat (i, "%U", unformat_sw_if_index, vam, &sw_if_index))
+            ;
+        else if (unformat (i, "sw_if_index %d", &sw_if_index))
+            ;
+        else if (unformat (i, "add"))
+            is_add = 1;
+        else if (unformat (i, "del"))
+            is_add = 0;
+        else if (unformat (i, "acl %d", &acl_index))
+            ;
+        else
+            break;
+    }
+
+    if (sw_if_index == ~0) {
+        errmsg ("missing interface name / explicit sw_if_index number \n");
+        return -99;
+    }
+
+    if (acl_index == ~0) {
+        errmsg ("missing ACL index\n");
+        return -99;
+    }
+
+
+
+    /* Construct the API message */
+    M(MACIP_ACL_INTERFACE_ADD_DEL, macip_acl_interface_add_del);
+    mp->acl_index = ntohl(acl_index);
+    mp->sw_if_index = ntohl(sw_if_index);
+    mp->is_add = is_add;
+
+    /* send it... */
+    S;
+
+    /* Wait for a reply... */
+    W;
+}
+
+static int api_acl_interface_set_acl_list (vat_main_t * vam)
+{
+    acl_test_main_t * sm = &acl_test_main;
+    unformat_input_t * i = vam->input;
+    f64 timeout;
+    vl_api_acl_interface_set_acl_list_t * mp;
+    u32 sw_if_index = ~0;
+    u32 acl_index = ~0;
+    u32 *inacls = 0;
+    u32 *outacls = 0;
+    u8 is_input = 0;
+
+//  acl_interface_set_acl_list <intfc> | sw_if_index <if-idx> input [acl-idx list] output [acl-idx list]
+
+    /* Parse args required to build the message */
+    while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT) {
+        if (unformat (i, "%U", unformat_sw_if_index, vam, &sw_if_index))
+            ;
+        else if (unformat (i, "sw_if_index %d", &sw_if_index))
+            ;
+        else if (unformat (i, "%d", &acl_index))
+          {
+            if(is_input)
+              vec_add1(inacls, htonl(acl_index));
+            else
+              vec_add1(outacls, htonl(acl_index));
+          }
+        else if (unformat (i, "acl %d", &acl_index))
+            ;
+        else if (unformat (i, "input"))
+            is_input = 1;
+        else if (unformat (i, "output"))
+            is_input = 0;
+        else
+            break;
+    }
+
+    if (sw_if_index == ~0) {
+        errmsg ("missing interface name / explicit sw_if_index number \n");
+        return -99;
+    }
+
+    /* Construct the API message */
+    M2(ACL_INTERFACE_SET_ACL_LIST, acl_interface_set_acl_list, sizeof(u32) * (vec_len(inacls) + vec_len(outacls)));
+    mp->sw_if_index = ntohl(sw_if_index);
+    mp->n_input = vec_len(inacls);
+    mp->count = vec_len(inacls) + vec_len(outacls);
+    vec_append(inacls, outacls);
+    if (vec_len(inacls) > 0)
+      clib_memcpy(mp->acls, inacls, vec_len(inacls)*sizeof(u32));
+
+    /* send it... */
+    S;
+
+    /* Wait for a reply... */
+    W;
+}
+
+
+static int api_acl_interface_list_dump (vat_main_t * vam)
+{
+    acl_test_main_t * sm = &acl_test_main;
+    unformat_input_t * i = vam->input;
+    f64 timeout;
+    u32 sw_if_index = ~0;
+    vl_api_acl_interface_list_dump_t * mp;
+
+    /* Parse args required to build the message */
+    while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT) {
+        if (unformat (i, "%U", unformat_sw_if_index, vam, &sw_if_index))
+            ;
+        else if (unformat (i, "sw_if_index %d", &sw_if_index))
+            ;
+        else
+            break;
+    }
+
+    /* Construct the API message */
+    M(ACL_INTERFACE_LIST_DUMP, acl_interface_list_dump);
+    mp->sw_if_index = ntohl (sw_if_index);
+
+    /* send it... */
+    S;
+
+    /* Wait for a reply... */
+    W;
+}
+
+static int api_acl_dump (vat_main_t * vam)
+{
+    acl_test_main_t * sm = &acl_test_main;
+    unformat_input_t * i = vam->input;
+    f64 timeout;
+    u32 acl_index = ~0;
+    vl_api_acl_dump_t * mp;
+
+    /* Parse args required to build the message */
+    while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT) {
+        if (unformat (i, "%d", &acl_index))
+            ;
+        else
+            break;
+    }
+
+    /* Construct the API message */
+    M(ACL_DUMP, acl_dump);
+    mp->acl_index = ntohl (acl_index);
+
+    /* send it... */
+    S;
+
+    /* Wait for a reply... */
+    W;
+}
+
+static int api_macip_acl_dump (vat_main_t * vam)
+{
+    acl_test_main_t * sm = &acl_test_main;
+    unformat_input_t * i = vam->input;
+    f64 timeout;
+    u32 acl_index = ~0;
+    vl_api_acl_dump_t * mp;
+
+    /* Parse args required to build the message */
+    while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT) {
+        if (unformat (i, "%d", &acl_index))
+            ;
+        else
+            break;
+    }
+
+    /* Construct the API message */
+    M(MACIP_ACL_DUMP, macip_acl_dump);
+    mp->acl_index = ntohl (acl_index);
+
+    /* send it... */
+    S;
+
+    /* Wait for a reply... */
+    W;
+}
+
+#define vec_validate_macip_acl_rules(v, idx) \
+  do {                                 \
+    if (vec_len(v) < idx+1) {  \
+      vec_validate(v, idx); \
+      v[idx].is_permit = 0x1; \
+    } \
+  } while (0)
+
+
+static int api_macip_acl_add (vat_main_t * vam)
+{
+    acl_test_main_t * sm = &acl_test_main;
+    unformat_input_t * i = vam->input;
+    f64 timeout;
+    vl_api_macip_acl_add_t * mp;
+    u32 msg_size = sizeof (*mp); /* without the rules */
+
+    vl_api_macip_acl_rule_t *rules = 0;
+    int rule_idx = 0;
+    int n_rules = 0;
+    u32 src_prefix_length = 0;
+    u32 action = 0;
+    ip4_address_t src_v4address;
+    ip6_address_t src_v6address;
+    u8 src_mac[6];
+    u8 *tag = 0;
+    u8 mac_mask_all_1[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+
+    while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT)
+    {
+        if (unformat (i, "ipv6"))
+          {
+            vec_validate_macip_acl_rules(rules, rule_idx);
+            rules[rule_idx].is_ipv6 = 1;
+          }
+        else if (unformat (i, "ipv4"))
+          {
+            vec_validate_macip_acl_rules(rules, rule_idx);
+            rules[rule_idx].is_ipv6 = 1;
+          }
+        else if (unformat (i, "permit"))
+          {
+            vec_validate_macip_acl_rules(rules, rule_idx);
+            rules[rule_idx].is_permit = 1;
+          }
+        else if (unformat (i, "deny"))
+          {
+            vec_validate_macip_acl_rules(rules, rule_idx);
+            rules[rule_idx].is_permit = 0;
+          }
+        else if (unformat (i, "action %d", &action))
+          {
+            vec_validate_macip_acl_rules(rules, rule_idx);
+            rules[rule_idx].is_permit = action;
+          }
+        else if (unformat (i, "ip %U/%d",
+         unformat_ip4_address, &src_v4address, &src_prefix_length))
+          {
+            vec_validate_macip_acl_rules(rules, rule_idx);
+            memcpy (rules[rule_idx].src_ip_addr, &src_v4address, 4);
+            rules[rule_idx].src_ip_prefix_len = src_prefix_length;
+            rules[rule_idx].is_ipv6 = 0;
+          }
+        else if (unformat (i, "ip %U/%d",
+         unformat_ip6_address, &src_v6address, &src_prefix_length))
+          {
+            vec_validate_macip_acl_rules(rules, rule_idx);
+            memcpy (rules[rule_idx].src_ip_addr, &src_v6address, 16);
+            rules[rule_idx].src_ip_prefix_len = src_prefix_length;
+            rules[rule_idx].is_ipv6 = 1;
+          }
+        else if (unformat (i, "mac %U",
+         my_unformat_mac_address, &src_mac))
+          {
+            vec_validate_macip_acl_rules(rules, rule_idx);
+            memcpy (rules[rule_idx].src_mac, &src_mac, 6);
+            memcpy (rules[rule_idx].src_mac_mask, &mac_mask_all_1, 6);
+          }
+        else if (unformat (i, "mask %U",
+         my_unformat_mac_address, &src_mac))
+          {
+            vec_validate_macip_acl_rules(rules, rule_idx);
+            memcpy (rules[rule_idx].src_mac_mask, &src_mac, 6);
+          }
+        else if (unformat (i, "tag %s", &tag))
+          {
+          }
+        else if (unformat (i, ","))
+          {
+            rule_idx++;
+            vec_validate_macip_acl_rules(rules, rule_idx);
+          }
+        else
+    break;
+    }
+
+    /* Construct the API message */
+    vam->result_ready = 0;
+
+    if(rules)
+      n_rules = vec_len(rules);
+    else
+      n_rules = 0;
+
+    msg_size += n_rules*sizeof(rules[0]);
+
+    mp = vl_msg_api_alloc_as_if_client(msg_size);
+    memset (mp, 0, msg_size);
+    mp->_vl_msg_id = ntohs (VL_API_MACIP_ACL_ADD + sm->msg_id_base);
+    mp->client_index = vam->my_client_index;
+    if (n_rules > 0)
+      clib_memcpy(mp->r, rules, n_rules*sizeof (mp->r[0]));
+    if (tag)
+      {
+        if (vec_len(tag) >= sizeof(mp->tag))
+          {
+            tag[sizeof(mp->tag)-1] = 0;
+            _vec_len(tag) = sizeof(mp->tag);
+          }
+        clib_memcpy(mp->tag, tag, vec_len(tag));
+        vec_free(tag);
+      }
+
+    mp->count = htonl(n_rules);
+
+    /* send it... */
+    S;
+
+    /* Wait for a reply... */
+    W;
+}
+
+/*
+ * List of messages that the api test plugin sends,
+ * and that the data plane plugin processes
+ */
+#define foreach_vpe_api_msg \
+_(acl_plugin_get_version, "") \
+_(acl_add_replace, "<acl-idx> [<ipv4|ipv6> <permit|permit+reflect|deny|action N> [src IP/plen] [dst IP/plen] [sport X-Y] [dport X-Y] [proto P] [tcpflags FL MASK], ... , ...") \
+_(acl_del, "<acl-idx>") \
+_(acl_dump, "[<acl-idx>]") \
+_(acl_interface_add_del, "<intfc> | sw_if_index <if-idx> [add|del] [input|output] acl <acl-idx>") \
+_(acl_interface_set_acl_list, "<intfc> | sw_if_index <if-idx> input [acl-idx list] output [acl-idx list]") \
+_(acl_interface_list_dump, "[<intfc> | sw_if_index <if-idx>]") \
+_(macip_acl_add, "...") \
+_(macip_acl_del, "<acl-idx>")\
+_(macip_acl_dump, "[<acl-idx>]") \
+_(macip_acl_interface_add_del, "<intfc> | sw_if_index <if-idx> [add|del] acl <acl-idx>") \
+_(macip_acl_interface_get, "")
+
+
+
+void vat_api_hookup (vat_main_t *vam)
+{
+    acl_test_main_t * sm = &acl_test_main;
+    /* Hook up handlers for replies from the data plane plug-in */
+#define _(N,n)                                                  \
+    vl_msg_api_set_handlers((VL_API_##N + sm->msg_id_base),     \
+                           #n,                                  \
+                           vl_api_##n##_t_handler,              \
+                           vl_noop_handler,                     \
+                           vl_api_##n##_t_endian,               \
+                           vl_api_##n##_t_print,                \
+                           sizeof(vl_api_##n##_t), 1);
+    foreach_vpe_api_reply_msg;
+#undef _
+
+    /* API messages we can send */
+#define _(n,h) hash_set_mem (vam->function_by_name, #n, api_##n);
+    foreach_vpe_api_msg;
+#undef _
+
+    /* Help strings */
+#define _(n,h) hash_set_mem (vam->help_by_name, #n, h);
+    foreach_vpe_api_msg;
+#undef _
+}
+
+clib_error_t * vat_plugin_register (vat_main_t *vam)
+{
+  acl_test_main_t * sm = &acl_test_main;
+  u8 * name;
+
+  sm->vat_main = vam;
+
+  name = format (0, "acl_%08x%c", api_version, 0);
+  sm->msg_id_base = vl_client_get_first_plugin_msg_id ((char *) name);
+
+  if (sm->msg_id_base != (u16) ~0)
+    vat_api_hookup (vam);
+
+  vec_free(name);
+
+  return 0;
+}
diff --git a/plugins/acl-plugin/acl/l2sess.c b/plugins/acl-plugin/acl/l2sess.c
new file mode 100644
index 00000000000..cc9bde4417d
--- /dev/null
+++ b/plugins/acl-plugin/acl/l2sess.c
@@ -0,0 +1,243 @@
+/*
+ * Copyright (c) 2016 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.
+ */
+/*
+ *------------------------------------------------------------------
+ * l2sess.c - simple MAC-swap API / debug CLI handling
+ *------------------------------------------------------------------
+ */
+
+#include <vnet/vnet.h>
+#include <vnet/plugin/plugin.h>
+#include <acl/l2sess.h>
+
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vlibsocket/api.h>
+#include <vppinfra/timing_wheel.h>
+
+#include <vnet/l2/l2_output.h>
+#include <vnet/l2/l2_input.h>
+
+void
+l2sess_vlib_plugin_register (vlib_main_t * vm, void* hh,
+		      int from_early_init)
+{
+  l2sess_main_t *sm = &l2sess_main;
+  vnet_plugin_handoff_t * h = hh;
+  memset (sm, 0, sizeof (*sm));
+
+  sm->vlib_main = vm;
+  sm->vnet_main = h->vnet_main;
+  sm->ethernet_main = h->ethernet_main;
+}
+
+void
+l2sess_init_next_features_input (vlib_main_t * vm, l2sess_main_t * sm)
+{
+#define _(node_name, node_var, is_out, is_ip6, is_track) \
+  if (!is_out) feat_bitmap_init_next_nodes(vm, node_var.index, L2INPUT_N_FEAT,  l2input_get_feat_names (), sm->node_var ## _input_next_node_index);
+  foreach_l2sess_node
+#undef _
+}
+
+void
+l2sess_add_our_next_nodes (vlib_main_t * vm, l2sess_main_t * sm,
+			   u8 * prev_node_name, int add_output_nodes)
+{
+  vlib_node_t *n;
+  n = vlib_get_node_by_name (vm, prev_node_name);
+#define _(node_name, node_var, is_out, is_ip6, is_track) \
+  if (is_out == add_output_nodes) { \
+    u32 idx = vlib_node_add_next_with_slot(vm, n->index, node_var.index, ~0); \
+    if (is_track) { \
+      sm->next_slot_track_node_by_is_ip6_is_out[is_ip6][is_out] = idx; \
+    } \
+  }
+  foreach_l2sess_node
+#undef _
+}
+
+void
+l2sess_setup_nodes (void)
+{
+  vlib_main_t *vm = vlib_get_main ();
+  l2sess_main_t *sm = &l2sess_main;
+
+  l2sess_init_next_features_input (vm, sm);
+
+  l2sess_add_our_next_nodes (vm, sm, (u8 *) "l2-input-classify", 0);
+  l2sess_add_our_next_nodes (vm, sm, (u8 *) "l2-output-classify", 1);
+
+}
+
+static char *
+get_l4_proto_str (int is_ip6, uint8_t l4_proto)
+{
+  switch (l4_proto)
+    {
+    case 6:
+      return "tcp";
+    case 17:
+      return "udp";
+    case 1:
+      return "icmp";
+    case 58:
+      return "icmp6";
+    default:
+      return "<?l4-unknown?>";
+    }
+}
+
+static clib_error_t *
+l2sess_show_command_fn (vlib_main_t * vm,
+			unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+  l2sess_main_t *sm = &l2sess_main;
+  clib_time_t *ct = &vm->clib_time;
+  l2s_session_t *s;
+  u64 now = clib_cpu_time_now ();
+
+  vlib_cli_output (vm, "Timing wheel info: \n%U", format_timing_wheel,
+		   &sm->timing_wheel, 255);
+
+  pool_foreach (s, sm->sessions, (
+				   {
+				   f64 ctime =
+				   (now -
+				    s->create_time) * ct->seconds_per_clock;
+				   f64 atime0 =
+				   (now -
+				    s->side[0].active_time) *
+				   ct->seconds_per_clock;
+				   f64 atime1 =
+				   (now -
+				    s->side[1].active_time) *
+				   ct->seconds_per_clock;
+/*
+    f64 ctime = (s->create_time - vm->cpu_time_main_loop_start) * ct->seconds_per_clock;
+    f64 atime0 = (s->side[0].active_time - vm->cpu_time_main_loop_start) * ct->seconds_per_clock;
+    f64 atime1 = (s->side[1].active_time - vm->cpu_time_main_loop_start) * ct->seconds_per_clock;
+*/
+				   u8 * out0 =
+				   format (0,
+					   "%5d: create time: %U pkts/bytes/active time: [ %ld %ld %U : %ld %ld %U ]\n",
+					   (s - sm->sessions),
+					   format_time_interval, "h:m:s:u",
+					   ctime, s->side[0].n_packets,
+					   s->side[0].n_bytes,
+					   format_time_interval, "h:m:s:u",
+					   atime0, s->side[1].n_packets,
+					   s->side[1].n_bytes,
+					   format_time_interval, "h:m:s:u",
+					   atime1); u8 * out1 = 0;
+				   if (s->is_ip6)
+				   {
+				   out1 =
+				   format (0, "%s %U :%u <-> %U :%u",
+					   get_l4_proto_str (s->is_ip6,
+							     s->l4_proto),
+					   format_ip6_address,
+					   &s->side[0].addr.ip6,
+					   s->side[0].port,
+					   format_ip6_address,
+					   &s->side[1].addr.ip6,
+					   s->side[1].port);}
+				   else
+				   {
+				   out1 =
+				   format (0, "%s %U :%u <-> %U :%u",
+					   get_l4_proto_str (s->is_ip6,
+							     s->l4_proto),
+					   format_ip4_address,
+					   &s->side[0].addr.ip4,
+					   s->side[0].port,
+					   format_ip4_address,
+					   &s->side[1].addr.ip4,
+					   s->side[1].port);}
+				   vlib_cli_output (vm, "%s       %s", out0,
+						    out1); vec_free (out0);
+				   vec_free (out1);}
+		));
+  return 0;
+}
+
+static clib_error_t *
+l2sess_show_count_command_fn (vlib_main_t * vm,
+			      unformat_input_t * input,
+			      vlib_cli_command_t * cmd)
+{
+  l2sess_main_t *sm = &l2sess_main;
+
+  vlib_cli_output (vm, "Timing wheel info: \n%U", format_timing_wheel,
+		   &sm->timing_wheel, 255);
+  vlib_cli_output (vm, "session pool len: %d, pool elts: %d",
+		   pool_len (sm->sessions), pool_elts (sm->sessions));
+  vlib_cli_output (vm,
+		   "attempted to delete sessions which were already free: %d",
+		   sm->counter_attempted_delete_free_session);
+  return 0;
+}
+
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (l2sess_show_command, static) = {
+    .path = "show l2sess",
+    .short_help = "show l2sess",
+    .function = l2sess_show_command_fn,
+};
+
+VLIB_CLI_COMMAND (l2sess_show_count_command, static) = {
+    .path = "show l2sess count",
+    .short_help = "show l2sess count",
+    .function = l2sess_show_count_command_fn,
+};
+/* *INDENT-OFF* */
+
+static inline u64
+time_sec_to_clock( clib_time_t *ct, f64 sec)
+{
+  return (u64)(((f64)sec)/ct->seconds_per_clock);
+}
+
+static clib_error_t * l2sess_init (vlib_main_t * vm)
+{
+  l2sess_main_t * sm = &l2sess_main;
+  clib_error_t * error = 0;
+  u64 cpu_time_now = clib_cpu_time_now();
+
+
+  clib_time_t *ct = &vm->clib_time;
+  sm->udp_session_idle_timeout = time_sec_to_clock(ct, UDP_SESSION_IDLE_TIMEOUT_SEC);
+  sm->tcp_session_idle_timeout = time_sec_to_clock(ct, TCP_SESSION_IDLE_TIMEOUT_SEC);
+  sm->tcp_session_transient_timeout = time_sec_to_clock(ct, TCP_SESSION_TRANSIENT_TIMEOUT_SEC);
+
+  /* The min sched time of 10e-1 causes erroneous behavior... */
+  sm->timing_wheel.min_sched_time = 10e-2;
+  sm->timing_wheel.max_sched_time = 3600.0*48.0;
+  timing_wheel_init (&sm->timing_wheel, cpu_time_now, vm->clib_time.clocks_per_second);
+  sm->timer_wheel_next_expiring_time = 0;
+  sm->timer_wheel_tick = time_sec_to_clock(ct, sm->timing_wheel.min_sched_time);
+  /* Pre-allocate expired nodes. */
+  vec_alloc (sm->data_from_advancing_timing_wheel, 32);
+
+  l2sess_setup_nodes();
+  l2output_init_output_node_vec (&sm->output_next_nodes.output_node_index_vec);
+
+  return error;
+}
+
+VLIB_INIT_FUNCTION (l2sess_init);
+
+
diff --git a/plugins/acl-plugin/acl/l2sess.h b/plugins/acl-plugin/acl/l2sess.h
new file mode 100644
index 00000000000..db899917113
--- /dev/null
+++ b/plugins/acl-plugin/acl/l2sess.h
@@ -0,0 +1,150 @@
+/*
+ * Copyright (c) 2016 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.
+ */
+#ifndef __included_l2sess_h__
+#define __included_l2sess_h__
+
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ethernet/ethernet.h>
+
+#include <vppinfra/hash.h>
+#include <vppinfra/error.h>
+#include <vppinfra/elog.h>
+#include <vppinfra/timing_wheel.h>
+
+#include <vnet/l2/l2_output.h>
+#include <vnet/l2/l2_input.h>
+
+#define _(node_name, node_var, is_out, is_ip6, is_track)
+#undef _
+#define foreach_l2sess_node \
+  _("aclp-l2s-input-ip4-add", l2sess_in_ip4_add, 0, 0, 0)  \
+  _("aclp-l2s-input-ip6-add", l2sess_in_ip6_add, 0, 1, 0)  \
+  _("aclp-l2s-output-ip4-add", l2sess_out_ip4_add, 1, 0, 0) \
+  _("aclp-l2s-output-ip6-add", l2sess_out_ip6_add, 1, 1, 0) \
+  _("aclp-l2s-input-ip4-track", l2sess_in_ip4_track, 0, 0, 1) \
+  _("aclp-l2s-input-ip6-track", l2sess_in_ip6_track, 0, 1, 1) \
+  _("aclp-l2s-output-ip4-track",l2sess_out_ip4_track, 1, 0, 1) \
+  _("aclp-l2s-output-ip6-track", l2sess_out_ip6_track, 1, 1, 1)
+
+#define _(node_name, node_var, is_out, is_ip6, is_track)  \
+  extern vlib_node_registration_t node_var;
+foreach_l2sess_node
+#undef _
+
+#define TCP_FLAG_FIN    0x01
+#define TCP_FLAG_SYN    0x02
+#define TCP_FLAG_RST    0x04
+#define TCP_FLAG_PUSH   0x08
+#define TCP_FLAG_ACK    0x10
+#define TCP_FLAG_URG    0x20
+#define TCP_FLAG_ECE    0x40
+#define TCP_FLAG_CWR    0x80
+#define TCP_FLAGS_RSTFINACKSYN (TCP_FLAG_RST + TCP_FLAG_FIN + TCP_FLAG_SYN + TCP_FLAG_ACK)
+#define TCP_FLAGS_ACKSYN (TCP_FLAG_SYN + TCP_FLAG_ACK)
+
+typedef struct {
+  ip46_address_t addr;
+  u64 active_time;
+  u64 n_packets;
+  u64 n_bytes;
+  u16 port;
+} l2s_session_side_t;
+
+enum {
+  L2S_SESSION_SIDE_IN = 0,
+  L2S_SESSION_SIDE_OUT,
+  L2S_N_SESSION_SIDES
+};
+
+typedef struct {
+  u64 create_time;
+  l2s_session_side_t side[L2S_N_SESSION_SIDES];
+  u8 l4_proto;
+  u8 is_ip6;
+  u16 tcp_flags_seen; /* u16 because of two sides */
+} l2s_session_t;
+
+#define PROD
+#ifdef PROD
+#define UDP_SESSION_IDLE_TIMEOUT_SEC 600
+#define TCP_SESSION_IDLE_TIMEOUT_SEC (3600*24)
+#define TCP_SESSION_TRANSIENT_TIMEOUT_SEC 120
+#else
+#define UDP_SESSION_IDLE_TIMEOUT_SEC 15
+#define TCP_SESSION_IDLE_TIMEOUT_SEC 15
+#define TCP_SESSION_TRANSIENT_TIMEOUT_SEC 5
+#endif
+
+typedef struct {
+    /*
+     * the next two fields are present for all nodes, but
+     *  only one of them is used per node - depending
+     * on whether the node is an input or output one.
+     */
+#define _(node_name, node_var, is_out, is_ip6, is_track) \
+    u32 node_var ## _input_next_node_index[32]; \
+    l2_output_next_nodes_st node_var ## _next_nodes;
+foreach_l2sess_node
+#undef _
+    l2_output_next_nodes_st output_next_nodes;
+
+    /* Next indices of the tracker nodes */
+    u32 next_slot_track_node_by_is_ip6_is_out[2][2];
+
+    /* 
+     * Pairing of "forward" and "reverse" tables by table index.
+     * Each relationship has two entries - for one and the other table,
+     * so it is bidirectional.
+     */
+     
+    u32 *fwd_to_rev_by_table_index;
+
+    /*
+     * The vector of per-interface session pools
+     */
+
+    l2s_session_t *sessions;
+
+    /* The session timeouts */
+    u64 tcp_session_transient_timeout;
+    u64 tcp_session_idle_timeout;
+    u64 udp_session_idle_timeout;
+
+    /* Timing wheel to time out the idle sessions */
+    timing_wheel_t timing_wheel;
+    u32 *data_from_advancing_timing_wheel;
+    u64 timer_wheel_next_expiring_time;
+    u64 timer_wheel_tick;
+
+    /* convenience */
+    vlib_main_t * vlib_main;
+    vnet_main_t * vnet_main;
+    ethernet_main_t * ethernet_main;
+
+    /* Counter(s) */
+    u64 counter_attempted_delete_free_session;
+} l2sess_main_t;
+
+l2sess_main_t l2sess_main;
+
+/* Just exposed for acl.c */
+
+void
+l2sess_vlib_plugin_register (vlib_main_t * vm, void * hh,
+                      int from_early_init);
+
+
+#endif /* __included_l2sess_h__ */
diff --git a/plugins/acl-plugin/acl/l2sess_node.c b/plugins/acl-plugin/acl/l2sess_node.c
new file mode 100644
index 00000000000..3e735f470e7
--- /dev/null
+++ b/plugins/acl-plugin/acl/l2sess_node.c
@@ -0,0 +1,813 @@
+/*
+ * Copyright (c) 2016 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 <netinet/in.h>
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vnet/pg/pg.h>
+#include <vppinfra/error.h>
+#include <acl/l2sess.h>
+#include <vnet/l2/l2_classify.h>
+
+
+typedef struct
+{
+  u32 next_index;
+  u32 sw_if_index;
+  u32 trace_flags;
+  u32 session_tables[2];
+  u32 session_nexts[2];
+  u8 l4_proto;
+} l2sess_trace_t;
+
+/* packet trace format function */
+
+#define _(node_name, node_var, is_out, is_ip6, is_track) \
+static u8 * format_## node_var ##_trace (u8 * s, va_list * args)      \
+{  \
+  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); \
+  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); \
+  l2sess_trace_t * t = va_arg (*args, l2sess_trace_t *); \
+ \
+  s = format (s, node_name ": sw_if_index %d, next index %d trace_flags %08x L4 proto %d\n" \
+                           "                 tables [ %d, %d ] nexts [ %d, %d ]", \
+              t->sw_if_index, t->next_index, t->trace_flags, t->l4_proto, \
+              t->session_tables[0], t->session_tables[1], \
+              t->session_nexts[0], t->session_nexts[1]); \
+  return s; \
+}
+foreach_l2sess_node
+#undef _
+#define foreach_l2sess_error \
+_(SWAPPED, "Mac swap packets processed")
+  typedef enum
+{
+#define _(sym,str) L2SESS_ERROR_##sym,
+  foreach_l2sess_error
+#undef _
+    L2SESS_N_ERROR,
+} l2sess_error_t;
+
+static char *l2sess_error_strings[] = {
+#define _(sym,string) string,
+  foreach_l2sess_error
+#undef _
+};
+
+typedef enum
+{
+  L2SESS_NEXT_DROP,
+  L2SESS_N_NEXT,
+} l2sess_next_t;
+
+u8
+l2sess_get_l4_proto (vlib_buffer_t * b0, int node_is_ip6)
+{
+  u8 proto;
+  int proto_offset;
+  if (node_is_ip6)
+    {
+      proto_offset = 20;
+    }
+  else
+    {
+      proto_offset = 23;
+    }
+  proto = *((u8 *) vlib_buffer_get_current (b0) + proto_offset);
+  return proto;
+}
+
+
+u8
+l2sess_get_tcp_flags (vlib_buffer_t * b0, int node_is_ip6)
+{
+  u8 flags;
+  int flags_offset;
+  if (node_is_ip6)
+    {
+      flags_offset = 14 + 40 + 13;	/* FIXME: no extension headers assumed */
+    }
+  else
+    {
+      flags_offset = 14 + 20 + 13;
+    }
+  flags = *((u8 *) vlib_buffer_get_current (b0) + flags_offset);
+  return flags;
+}
+
+static inline int
+l4_tcp_or_udp (u8 proto)
+{
+  return ((proto == 6) || (proto == 17));
+}
+
+void
+l2sess_get_session_tables (l2sess_main_t * sm, u32 sw_if_index,
+			   int node_is_out, int node_is_ip6, u8 l4_proto,
+			   u32 * session_tables)
+{
+/*
+ * Based on the direction, l3 and l4 protocol, fill a u32[2] array:
+ * [0] is index for the "direct match" path, [1] is for "mirrored match".
+ * Store the indices of the tables to add the session to in session_tables[]
+ */
+  l2_output_classify_main_t *l2om = &l2_output_classify_main;
+  l2_input_classify_main_t *l2im = &l2_input_classify_main;
+
+  u32 output_table_index;
+  u32 input_table_index;
+
+  if (!l4_tcp_or_udp (l4_proto))
+    {
+      return;
+    }
+
+  if (node_is_ip6)
+    {
+      vec_validate_init_empty (l2im->
+			       classify_table_index_by_sw_if_index
+			       [L2_INPUT_CLASSIFY_TABLE_IP6], sw_if_index,
+			       ~0);
+      input_table_index =
+	l2im->
+	classify_table_index_by_sw_if_index[L2_INPUT_CLASSIFY_TABLE_IP6]
+	[sw_if_index];
+      vec_validate_init_empty (l2om->
+			       classify_table_index_by_sw_if_index
+			       [L2_OUTPUT_CLASSIFY_TABLE_IP6], sw_if_index,
+			       ~0);
+      output_table_index =
+	l2om->
+	classify_table_index_by_sw_if_index[L2_OUTPUT_CLASSIFY_TABLE_IP6]
+	[sw_if_index];
+    }
+  else
+    {
+      vec_validate_init_empty (l2im->
+			       classify_table_index_by_sw_if_index
+			       [L2_INPUT_CLASSIFY_TABLE_IP4], sw_if_index,
+			       ~0);
+      input_table_index =
+	l2im->
+	classify_table_index_by_sw_if_index[L2_INPUT_CLASSIFY_TABLE_IP4]
+	[sw_if_index];
+      vec_validate_init_empty (l2om->
+			       classify_table_index_by_sw_if_index
+			       [L2_OUTPUT_CLASSIFY_TABLE_IP4], sw_if_index,
+			       ~0);
+      output_table_index =
+	l2om->
+	classify_table_index_by_sw_if_index[L2_OUTPUT_CLASSIFY_TABLE_IP4]
+	[sw_if_index];
+    }
+
+  if (node_is_out)
+    {
+      session_tables[0] = output_table_index;
+      session_tables[1] = input_table_index;
+    }
+  else
+    {
+      session_tables[0] = input_table_index;
+      session_tables[1] = output_table_index;
+    }
+}
+
+void
+l2sess_get_session_nexts (l2sess_main_t * sm, u32 sw_if_index,
+			  int node_is_out, int node_is_ip6, u8 l4_proto,
+			  u32 * session_nexts)
+{
+/*
+ * Based on the direction, l3 and l4 protocol, fill a u32[2] array:
+ * [0] is the index for the "direct match" path, [1] is for "mirrored match".
+ * Store the match_next_index in session_nexts[] for a new session entry which is being added to session tables.
+ */
+  u32 input_node_index;
+  u32 output_node_index;
+
+  if (!l4_tcp_or_udp (l4_proto))
+    {
+      return;
+    }
+
+  input_node_index =
+    sm->next_slot_track_node_by_is_ip6_is_out[node_is_ip6][0];
+  output_node_index =
+    sm->next_slot_track_node_by_is_ip6_is_out[node_is_ip6][1];
+
+  if (node_is_out)
+    {
+      session_nexts[0] = output_node_index;
+      session_nexts[1] = input_node_index;
+    }
+  else
+    {
+      session_nexts[0] = input_node_index;
+      session_nexts[1] = output_node_index;
+    }
+}
+
+
+static inline void
+swap_bytes (vlib_buffer_t * b0, int off_a, int off_b, int nbytes)
+{
+  u8 tmp;
+  u8 *pa = vlib_buffer_get_current (b0) + off_a;
+  u8 *pb = vlib_buffer_get_current (b0) + off_b;
+  while (nbytes--)
+    {
+      tmp = *pa;
+      *pa++ = *pb;
+      *pb++ = tmp;
+    }
+}
+
+/*
+ * This quite pro[bv]ably is a terrible idea performance wise. Moreso doing it twice.
+ * Would having a long (ish) chunk of memory work better for this ?
+ * We will see when we get to the performance of this.
+ */
+void
+l2sess_flip_l3l4_fields (vlib_buffer_t * b0, int node_is_ip6, u8 l4_proto)
+{
+  if (!l4_tcp_or_udp (l4_proto))
+    {
+      return;
+    }
+  if (node_is_ip6)
+    {
+      swap_bytes (b0, 22, 38, 16);	/* L3 */
+      swap_bytes (b0, 54, 56, 2);	/* L4 (when no EH!) */
+    }
+  else
+    {
+      swap_bytes (b0, 26, 30, 4);	/* L3 */
+      swap_bytes (b0, 34, 36, 2);	/* L4 */
+    }
+}
+
+void
+l2sess_add_session (vlib_buffer_t * b0, int node_is_out, int node_is_ip6,
+		    u32 session_table, u32 session_match_next,
+		    u32 opaque_index)
+{
+  vnet_classify_main_t *cm = &vnet_classify_main;
+  u32 action = 0;
+  u32 metadata = 0;
+
+#ifdef DEBUG_SESSIONS
+  printf ("Adding session to table %d with next %d\n", session_table,
+	  session_match_next);
+#endif
+  vnet_classify_add_del_session (cm, session_table,
+				 vlib_buffer_get_current (b0),
+				 session_match_next, opaque_index, 0, action,
+				 metadata, 1);
+}
+
+
+
+static void *
+get_ptr_to_offset (vlib_buffer_t * b0, int offset)
+{
+  u8 *p = vlib_buffer_get_current (b0) + offset;
+  return p;
+}
+
+
+/*
+ * FIXME: Hardcoded offsets are ugly, although if casting to structs one
+ * would need to take care about alignment.. So let's for now be naive and simple.
+ */
+
+void
+session_store_ip4_l3l4_info (vlib_buffer_t * b0, l2s_session_t * sess,
+			     int node_is_out)
+{
+  clib_memcpy (&sess->side[1 - node_is_out].addr.ip4,
+	       get_ptr_to_offset (b0, 26), 4);
+  clib_memcpy (&sess->side[node_is_out].addr.ip4, get_ptr_to_offset (b0, 30),
+	       4);
+  sess->side[1 - node_is_out].port =
+    ntohs (*(u16 *) get_ptr_to_offset (b0, 34));
+  sess->side[node_is_out].port = ntohs (*(u16 *) get_ptr_to_offset (b0, 36));
+}
+
+void
+session_store_ip6_l3l4_info (vlib_buffer_t * b0, l2s_session_t * sess,
+			     int node_is_out)
+{
+  clib_memcpy (&sess->side[1 - node_is_out].addr.ip6,
+	       get_ptr_to_offset (b0, 22), 16);
+  clib_memcpy (&sess->side[node_is_out].addr.ip4, get_ptr_to_offset (b0, 38),
+	       16);
+  sess->side[1 - node_is_out].port =
+    ntohs (*(u16 *) get_ptr_to_offset (b0, 54));
+  sess->side[node_is_out].port = ntohs (*(u16 *) get_ptr_to_offset (b0, 56));
+}
+
+static void
+build_match_from_session (l2sess_main_t * sm, u8 * match,
+			  l2s_session_t * sess, int is_out)
+{
+  if (sess->is_ip6)
+    {
+      match[20] = sess->l4_proto;
+      clib_memcpy (&match[22], &sess->side[1 - is_out].addr.ip6, 16);
+      clib_memcpy (&match[38], &sess->side[is_out].addr.ip4, 16);
+      *(u16 *) & match[54] = htons (sess->side[1 - is_out].port);
+      *(u16 *) & match[56] = htons (sess->side[is_out].port);
+    }
+  else
+    {
+      match[23] = sess->l4_proto;
+      clib_memcpy (&match[26], &sess->side[1 - is_out].addr.ip6, 4);
+      clib_memcpy (&match[30], &sess->side[is_out].addr.ip4, 4);
+      *(u16 *) & match[34] = htons (sess->side[1 - is_out].port);
+      *(u16 *) & match[36] = htons (sess->side[is_out].port);
+    }
+}
+
+static void
+delete_session (l2sess_main_t * sm, u32 sw_if_index, u32 session_index)
+{
+  vnet_classify_main_t *cm = &vnet_classify_main;
+  u8 match[5 * 16];		/* For building the mock of the packet to delete the classifier session */
+  u32 session_tables[2] = { ~0, ~0 };
+  l2s_session_t *sess = sm->sessions + session_index;
+  if (pool_is_free (sm->sessions, sess))
+    {
+      sm->counter_attempted_delete_free_session++;
+      return;
+    }
+  l2sess_get_session_tables (sm, sw_if_index, 0, sess->is_ip6, sess->l4_proto,
+			     session_tables);
+  if (session_tables[1] != ~0)
+    {
+      build_match_from_session (sm, match, sess, 1);
+      vnet_classify_add_del_session (cm, session_tables[1], match, 0, 0, 0, 0,
+				     0, 0);
+    }
+  if (session_tables[1] != ~0)
+    {
+      build_match_from_session (sm, match, sess, 1);
+      vnet_classify_add_del_session (cm, session_tables[1], match, 0, 0, 0, 0,
+				     0, 0);
+    }
+  pool_put (sm->sessions, sess);
+}
+
+static void
+udp_session_account_buffer (vlib_buffer_t * b0, l2s_session_t * s,
+			    int which_side, u64 now)
+{
+  l2s_session_side_t *ss = &s->side[which_side];
+  ss->active_time = now;
+  ss->n_packets++;
+  ss->n_bytes += b0->current_data + b0->current_length;
+}
+
+static inline u64
+udp_session_get_timeout (l2sess_main_t * sm, l2s_session_t * sess, u64 now)
+{
+  return (sm->udp_session_idle_timeout);
+}
+
+static void
+tcp_session_account_buffer (vlib_buffer_t * b0, l2s_session_t * s,
+			    int which_side, u64 now)
+{
+  l2s_session_side_t *ss = &s->side[which_side];
+  ss->active_time = now;
+  ss->n_packets++;
+  ss->n_bytes += b0->current_data + b0->current_length;
+  /* Very very lightweight TCP state tracking: just record which flags were seen */
+  s->tcp_flags_seen |=
+    l2sess_get_tcp_flags (b0, s->is_ip6) << (8 * which_side);
+}
+
+/*
+ * Since we are tracking for the purposes of timing the sessions out,
+ * we mostly care about two states: established (maximize the idle timeouts)
+ * and transient (halfopen/halfclosed/reset) - we need to have a reasonably short timeout to
+ * quickly get rid of sessions but not short enough to violate the TCP specs.
+ */
+
+static inline u64
+tcp_session_get_timeout (l2sess_main_t * sm, l2s_session_t * sess, u64 now)
+{
+  /* seen both SYNs and ACKs but not FINs means we are in establshed state */
+  u16 masked_flags =
+    sess->tcp_flags_seen & ((TCP_FLAGS_RSTFINACKSYN << 8) +
+			    TCP_FLAGS_RSTFINACKSYN);
+  if (((TCP_FLAGS_ACKSYN << 8) + TCP_FLAGS_ACKSYN) == masked_flags)
+    {
+      return (sm->tcp_session_idle_timeout);
+    }
+  else
+    {
+      return (sm->tcp_session_transient_timeout);
+    }
+}
+
+static inline u64
+session_get_timeout (l2sess_main_t * sm, l2s_session_t * sess, u64 now)
+{
+  u64 timeout;
+
+  switch (sess->l4_proto)
+    {
+    case 6:
+      timeout = tcp_session_get_timeout (sm, sess, now);
+      break;
+    case 17:
+      timeout = udp_session_get_timeout (sm, sess, now);
+      break;
+    default:
+      timeout = 0;
+    }
+
+  return timeout;
+}
+
+static inline u64
+get_session_last_active_time(l2s_session_t * sess)
+{
+  u64 last_active =
+    sess->side[0].active_time >
+    sess->side[1].active_time ? sess->side[0].active_time : sess->side[1].
+    active_time;
+  return last_active;
+}
+
+static int
+session_is_alive (l2sess_main_t * sm, l2s_session_t * sess, u64 now, u64 *last_active_cache)
+{
+  u64 last_active = get_session_last_active_time(sess);
+  u64 timeout = session_get_timeout (sm, sess, now);
+  int is_alive = ((now - last_active) < timeout);
+  if (last_active_cache)
+    *last_active_cache = last_active;
+  return is_alive;
+}
+
+void
+check_idle_sessions (l2sess_main_t * sm, u32 sw_if_index, u64 now)
+{
+  sm->timer_wheel_next_expiring_time = 0;
+  sm->data_from_advancing_timing_wheel
+    =
+    timing_wheel_advance (&sm->timing_wheel, now,
+			  sm->data_from_advancing_timing_wheel,
+			  &sm->timer_wheel_next_expiring_time);
+#ifdef DEBUG_SESSIONS_VERBOSE
+  {
+    clib_time_t *ct = &sm->vlib_main->clib_time;
+    f64 ctime;
+    ctime = now * ct->seconds_per_clock;
+    clib_warning ("Now        : %U", format_time_interval, "h:m:s:u", ctime);
+    ctime = sm->timer_wheel_next_expiring_time * ct->seconds_per_clock;
+    clib_warning ("Next expire: %U", format_time_interval, "h:m:s:u", ctime);
+    clib_warning ("Expired items: %d",
+		  (int) vec_len (sm->data_from_advancing_timing_wheel));
+  }
+#endif
+
+  sm->timer_wheel_next_expiring_time = now + sm->timer_wheel_tick;
+
+  if (PREDICT_FALSE (_vec_len (sm->data_from_advancing_timing_wheel) > 0))
+    {
+      uword i;
+      for (i = 0; i < vec_len (sm->data_from_advancing_timing_wheel); i++)
+	{
+	  u32 session_index = sm->data_from_advancing_timing_wheel[i];
+	  if (!pool_is_free_index (sm->sessions, session_index))
+	    {
+	      l2s_session_t *sess = sm->sessions + session_index;
+              u64 last_active;
+              if (session_is_alive (sm, sess, now, &last_active))
+                {
+#ifdef DEBUG_SESSIONS
+	      clib_warning ("Restarting timer for session %d", (int) session_index);
+#endif
+                    /* Pretend we did this in the past, at last_active moment */
+                    timing_wheel_insert (&sm->timing_wheel,
+                                         last_active + session_get_timeout (sm, sess,
+                                                                    last_active),
+                                         session_index);
+                }
+              else
+                {
+#ifdef DEBUG_SESSIONS
+	      clib_warning ("Deleting session %d", (int) session_index);
+#endif
+	      delete_session (sm, sw_if_index, session_index);
+                }
+	    }
+	}
+      _vec_len (sm->data_from_advancing_timing_wheel) = 0;
+    }
+}
+
+static uword
+l2sess_node_fn (vlib_main_t * vm,
+		vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  u32 n_left_from, *from, *to_next;
+  l2sess_next_t next_index;
+  u32 pkts_swapped = 0;
+  u32 cached_sw_if_index = (u32) ~ 0;
+  u32 cached_next_index = (u32) ~ 0;
+  u32 feature_bitmap0;
+  u32 trace_flags0;
+
+  l2sess_main_t *sm = &l2sess_main;
+
+  from = vlib_frame_vector_args (frame);
+  n_left_from = frame->n_vectors;
+  next_index = node->cached_next_index;
+
+  while (n_left_from > 0)
+    {
+      u32 n_left_to_next;
+
+      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+      /* Only a single loop for now for simplicity */
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  u32 bi0;
+	  vlib_buffer_t *b0;
+	  u32 next0 = L2SESS_NEXT_DROP;
+	  u32 sw_if_index0;
+	  //ethernet_header_t *en0;
+
+	  /* speculatively enqueue b0 to the current next frame */
+	  bi0 = from[0];
+	  to_next[0] = bi0;
+	  from += 1;
+	  to_next += 1;
+	  n_left_from -= 1;
+	  n_left_to_next -= 1;
+
+	  b0 = vlib_get_buffer (vm, bi0);
+	  //en0 = vlib_buffer_get_current (b0);
+
+/*
+ * The non-boilerplate is in the block below.
+ * Note first a magic macro block that sets up the behavior qualifiers:
+ *     node_is_out : 1 = is output, 0 = is input
+ *     node_is_ip6 : 1 = is ip6, 0 = is ip4
+ *     node_is_track : 1 = is a state tracking node, 0 - is a session addition node
+ *
+ * Subsequently the code adjusts its behavior depending on these variables.
+ * It's most probably not great performance wise but much easier to work with.
+ *
+ */
+	  {
+	    int node_is_out = -1;
+	    CLIB_UNUSED (int node_is_ip6) = -1;
+	    CLIB_UNUSED (int node_is_track) = -1;
+	    u32 node_index = 0;
+	    u32 session_tables[2] = { ~0, ~0 };
+	    u32 session_nexts[2] = { ~0, ~0 };
+	    l2_output_next_nodes_st *next_nodes = 0;
+	    u32 *input_feat_next_node_index;
+	    u8 l4_proto;
+	    u64 now = clib_cpu_time_now ();
+
+/* 
+ * Set the variables according to which of the 8 nodes we are.
+ * Hopefully the compiler is smart enough to eliminate the extraneous.
+ */
+#define _(node_name, node_var, is_out, is_ip6, is_track)                 \
+if(node_var.index == node->node_index)                                   \
+  {                                                                      \
+    node_is_out = is_out;                                                \
+    node_is_ip6 = is_ip6;                                                \
+    node_is_track = is_track;                                            \
+    node_index = node_var.index;                                         \
+    next_nodes = &sm->node_var ## _next_nodes;                           \
+    input_feat_next_node_index = sm->node_var ## _input_next_node_index; \
+  }
+	    foreach_l2sess_node
+#undef _
+	      trace_flags0 = 0;
+	    if (node_is_out)
+	      {
+		sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+	      }
+	    else
+	      {
+		sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+	      }
+	    /* potentially also remove the nodes here */
+	    feature_bitmap0 = vnet_buffer (b0)->l2.feature_bitmap;
+
+	    if (node_is_track)
+	      {
+		u32 sess_index = vnet_buffer (b0)->l2_classify.opaque_index;
+		l2s_session_t *sess = sm->sessions + sess_index;
+		l4_proto = sess->l4_proto;
+
+		if (session_is_alive (sm, sess, now, 0))
+		  {
+		    if (6 == l4_proto)
+		      {
+			tcp_session_account_buffer (b0, sess, node_is_out,
+						    now);
+		      }
+		    else
+		      {
+			udp_session_account_buffer (b0, sess, node_is_out,
+						    now);
+		      }
+		  }
+		else
+		  {
+		    timing_wheel_delete (&sm->timing_wheel, sess_index);
+		    delete_session (sm, sw_if_index0, sess_index);
+		    /* FIXME: drop the packet that hit the obsolete node, for now. We really ought to recycle it. */
+		    next0 = 0;
+		  }
+	      }
+	    else
+	      {
+		/*
+		 * "-add" node: take l2opaque which arrived to us, and deduce
+		 * the tables out of that. ~0 means the topmost classifier table
+		 * applied for this AF on the RX(for input)/TX(for output)) sw_if_index.
+		 * Also add the mirrored session to the paired table.
+		 */
+		l2s_session_t *sess;
+		u32 sess_index;
+
+		l4_proto = l2sess_get_l4_proto (b0, node_is_ip6);
+
+		pool_get (sm->sessions, sess);
+		sess_index = sess - sm->sessions;
+		sess->create_time = now;
+		sess->side[node_is_out].active_time = now;
+		sess->side[1 - node_is_out].active_time = now;
+		sess->l4_proto = l4_proto;
+		sess->is_ip6 = node_is_ip6;
+		if (node_is_ip6)
+		  {
+		    session_store_ip6_l3l4_info (b0, sess, node_is_out);
+		  }
+		else
+		  {
+		    session_store_ip4_l3l4_info (b0, sess, node_is_out);
+		  }
+
+		l2sess_get_session_tables (sm, sw_if_index0, node_is_out,
+					   node_is_ip6, l4_proto,
+					   session_tables);
+		l2sess_get_session_nexts (sm, sw_if_index0, node_is_out,
+					  node_is_ip6, l4_proto,
+					  session_nexts);
+		l2sess_flip_l3l4_fields (b0, node_is_ip6, l4_proto);
+		if (session_tables[1] != ~0)
+		  {
+		    l2sess_add_session (b0, node_is_out, node_is_ip6,
+					session_tables[1], session_nexts[1],
+					sess_index);
+		  }
+		l2sess_flip_l3l4_fields (b0, node_is_ip6, l4_proto);
+		if (session_tables[0] != ~0)
+		  {
+		    l2sess_add_session (b0, node_is_out, node_is_ip6,
+					session_tables[0], session_nexts[0],
+					sess_index);
+		  }
+		if (6 == sess->l4_proto)
+		  {
+		    tcp_session_account_buffer (b0, sess, node_is_out, now);
+		  }
+		else
+		  {
+		    udp_session_account_buffer (b0, sess, node_is_out, now);
+		  }
+		timing_wheel_insert (&sm->timing_wheel,
+				     now + session_get_timeout (sm, sess,
+								now),
+				     sess_index);
+	      }
+
+	    if (now >= sm->timer_wheel_next_expiring_time)
+	      {
+		check_idle_sessions (sm, sw_if_index0, now);
+	      }
+
+	    if (node_is_out)
+	      {
+		if (feature_bitmap0)
+		  {
+		    trace_flags0 |= 0x10;
+		  }
+		if (sw_if_index0 == cached_sw_if_index)
+		  {
+		    trace_flags0 |= 0x20;
+		  }
+		l2_output_dispatch (sm->vlib_main,
+				    sm->vnet_main,
+				    node,
+				    node_index,
+				    &cached_sw_if_index,
+				    &cached_next_index,
+				    next_nodes,
+				    b0, sw_if_index0, feature_bitmap0,
+				    &next0);
+		trace_flags0 |= 2;
+
+	      }
+	    else
+	      {
+		next0 =
+		  feat_bitmap_get_next_node_index (input_feat_next_node_index,
+						   feature_bitmap0);
+		trace_flags0 |= 4;
+
+	      }
+
+
+
+	    if (next0 >= node->n_next_nodes)
+	      {
+		trace_flags0 |= 1;
+	      }
+
+	    if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+			       && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+	      {
+		l2sess_trace_t *t =
+		  vlib_add_trace (vm, node, b0, sizeof (*t));
+		t->sw_if_index = sw_if_index0;
+		t->next_index = next0;
+		t->trace_flags = trace_flags0;
+		t->l4_proto = l4_proto;
+		t->session_tables[0] = session_tables[0];
+		t->session_tables[1] = session_tables[1];
+		t->session_nexts[0] = session_nexts[0];
+		t->session_nexts[1] = session_nexts[1];
+	      }
+
+	  }
+	  pkts_swapped += 1;
+	  if (next0 >= node->n_next_nodes)
+	    {
+	      next0 = 0;
+	    }
+
+	  /* verify speculative enqueue, maybe switch current next frame */
+	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+					   to_next, n_left_to_next,
+					   bi0, next0);
+	}
+
+      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+    }
+  vlib_node_increment_counter (vm, node->node_index,
+			       L2SESS_ERROR_SWAPPED, pkts_swapped);
+  return frame->n_vectors;
+}
+
+
+#define _(node_name, node_var, is_out, is_ip6, is_track) \
+static uword                                             \
+node_var ## node_fn (vlib_main_t * vm,                   \
+                  vlib_node_runtime_t * node,            \
+                  vlib_frame_t * frame)                  \
+{                                                        \
+  return l2sess_node_fn(vm, node, frame);                \
+}                                                        \
+VLIB_REGISTER_NODE (node_var) = {                        \
+  .function = node_var ## node_fn,                       \
+  .name = node_name,                                     \
+  .vector_size = sizeof (u32),                           \
+  .format_trace = format_ ## node_var ## _trace,         \
+  .type = VLIB_NODE_TYPE_INTERNAL,                       \
+                                                         \
+  .n_errors = ARRAY_LEN(l2sess_error_strings),           \
+  .error_strings = l2sess_error_strings,                 \
+                                                         \
+  .n_next_nodes = L2SESS_N_NEXT,                         \
+  .next_nodes = {                                        \
+        [L2SESS_NEXT_DROP] = "error-drop",               \
+  },                                                     \
+};
+foreach_l2sess_node
+#undef _
diff --git a/plugins/acl-plugin/acl/node_in.c b/plugins/acl-plugin/acl/node_in.c
new file mode 100644
index 00000000000..2a5199a9ab8
--- /dev/null
+++ b/plugins/acl-plugin/acl/node_in.c
@@ -0,0 +1,168 @@
+/*
+ * Copyright (c) 2016 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 <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vnet/pg/pg.h>
+#include <vppinfra/error.h>
+#include <acl/acl.h>
+#include "node_in.h"
+
+typedef struct
+{
+  u32 next_index;
+  u32 sw_if_index;
+  u32 match_acl_index;
+  u32 match_rule_index;
+  u32 trace_bitmap;
+} acl_in_trace_t;
+
+/* packet trace format function */
+static u8 *
+format_acl_in_trace (u8 * s, va_list * args)
+{
+  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+  acl_in_trace_t *t = va_arg (*args, acl_in_trace_t *);
+
+  s =
+    format (s,
+	    "ACL_IN: sw_if_index %d, next index %d, match: inacl %d rule %d trace_bits %08x",
+	    t->sw_if_index, t->next_index, t->match_acl_index,
+	    t->match_rule_index, t->trace_bitmap);
+  return s;
+}
+
+vlib_node_registration_t acl_in_node;
+
+#define foreach_acl_in_error \
+_(ACL_CHECK, "InACL check packets processed")
+
+typedef enum
+{
+#define _(sym,str) ACL_IN_ERROR_##sym,
+  foreach_acl_in_error
+#undef _
+    ACL_IN_N_ERROR,
+} acl_in_error_t;
+
+static char *acl_in_error_strings[] = {
+#define _(sym,string) string,
+  foreach_acl_in_error
+#undef _
+};
+
+static uword
+acl_in_node_fn (vlib_main_t * vm,
+		vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  u32 n_left_from, *from, *to_next;
+  acl_in_next_t next_index;
+  u32 pkts_acl_checked = 0;
+  u32 feature_bitmap0;
+  u32 trace_bitmap = 0;
+  u32 *input_feat_next_node_index =
+    acl_main.acl_in_node_input_next_node_index;
+
+  from = vlib_frame_vector_args (frame);
+  n_left_from = frame->n_vectors;
+  next_index = node->cached_next_index;
+
+  while (n_left_from > 0)
+    {
+      u32 n_left_to_next;
+
+      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  u32 bi0;
+	  vlib_buffer_t *b0;
+	  u32 next0 = ~0;
+	  u32 sw_if_index0;
+	  u32 next = ~0;
+	  u32 match_acl_index = ~0;
+	  u32 match_rule_index = ~0;
+
+	  /* speculatively enqueue b0 to the current next frame */
+	  bi0 = from[0];
+	  to_next[0] = bi0;
+	  from += 1;
+	  to_next += 1;
+	  n_left_from -= 1;
+	  n_left_to_next -= 1;
+
+	  b0 = vlib_get_buffer (vm, bi0);
+
+
+	  sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+	  feature_bitmap0 = vnet_buffer (b0)->l2.feature_bitmap;
+
+	  input_acl_packet_match (sw_if_index0, b0, &next, &match_acl_index,
+				  &match_rule_index, &trace_bitmap);
+	  if (next != ~0)
+	    {
+	      next0 = next;
+	    }
+	  if (next0 == ~0)
+	    {
+	      next0 =
+		feat_bitmap_get_next_node_index (input_feat_next_node_index,
+						 feature_bitmap0);
+	    }
+
+	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+			     && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+	    {
+	      acl_in_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
+	      t->sw_if_index = sw_if_index0;
+	      t->next_index = next0;
+	      t->match_acl_index = match_acl_index;
+	      t->match_rule_index = match_rule_index;
+	      t->trace_bitmap = trace_bitmap;
+	    }
+
+	  next0 = next0 < node->n_next_nodes ? next0 : 0;
+
+	  pkts_acl_checked += 1;
+
+	  /* verify speculative enqueue, maybe switch current next frame */
+	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+					   to_next, n_left_to_next,
+					   bi0, next0);
+	}
+
+      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+    }
+
+  vlib_node_increment_counter (vm, acl_in_node.index,
+			       ACL_IN_ERROR_ACL_CHECK, pkts_acl_checked);
+  return frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (acl_in_node) =
+{
+  .function = acl_in_node_fn,.name = "acl-plugin-in",.vector_size =
+    sizeof (u32),.format_trace = format_acl_in_trace,.type =
+    VLIB_NODE_TYPE_INTERNAL,.n_errors =
+    ARRAY_LEN (acl_in_error_strings),.error_strings =
+    acl_in_error_strings,.n_next_nodes = ACL_IN_N_NEXT,
+    /* edit / add dispositions here */
+    .next_nodes =
+  {
+  [ACL_IN_ERROR_DROP] = "error-drop",
+      [ACL_IN_ETHERNET_INPUT] = "ethernet-input",
+      [ACL_IN_L2S_INPUT_IP4_ADD] = "aclp-l2s-input-ip4-add",
+      [ACL_IN_L2S_INPUT_IP6_ADD] = "aclp-l2s-input-ip6-add",}
+,};
diff --git a/plugins/acl-plugin/acl/node_in.h b/plugins/acl-plugin/acl/node_in.h
new file mode 100644
index 00000000000..502bbf8dd1d
--- /dev/null
+++ b/plugins/acl-plugin/acl/node_in.h
@@ -0,0 +1,12 @@
+#ifndef _NODE_IN_H_
+#define _NODE_IN_H_
+
+typedef enum {
+  ACL_IN_ERROR_DROP,
+  ACL_IN_ETHERNET_INPUT,
+  ACL_IN_L2S_INPUT_IP4_ADD,
+  ACL_IN_L2S_INPUT_IP6_ADD,
+  ACL_IN_N_NEXT,
+} acl_in_next_t;
+
+#endif
diff --git a/plugins/acl-plugin/acl/node_out.c b/plugins/acl-plugin/acl/node_out.c
new file mode 100644
index 00000000000..50af3679b6e
--- /dev/null
+++ b/plugins/acl-plugin/acl/node_out.c
@@ -0,0 +1,175 @@
+/*
+ * Copyright (c) 2016 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 <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vnet/pg/pg.h>
+#include <vppinfra/error.h>
+#include <acl/acl.h>
+
+#include "node_out.h"
+
+typedef struct
+{
+  u32 next_index;
+  u32 sw_if_index;
+  u32 match_acl_index;
+  u32 match_rule_index;
+  u32 trace_bitmap;
+} acl_out_trace_t;
+
+/* packet trace format function */
+static u8 *
+format_acl_out_trace (u8 * s, va_list * args)
+{
+  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+  acl_out_trace_t *t = va_arg (*args, acl_out_trace_t *);
+  s =
+    format (s,
+	    "ACL_OUT: sw_if_index %d, next index %d, match: outacl %d rule %d trace_bits %08x",
+	    t->sw_if_index, t->next_index, t->match_acl_index,
+	    t->match_rule_index, t->trace_bitmap);
+  return s;
+}
+
+vlib_node_registration_t acl_out_node;
+
+#define foreach_acl_out_error \
+_(ACL_CHECK, "OutACL check packets processed")
+
+typedef enum
+{
+#define _(sym,str) ACL_OUT_ERROR_##sym,
+  foreach_acl_out_error
+#undef _
+    ACL_OUT_N_ERROR,
+} acl_out_error_t;
+
+static char *acl_out_error_strings[] = {
+#define _(sym,string) string,
+  foreach_acl_out_error
+#undef _
+};
+
+static uword
+acl_out_node_fn (vlib_main_t * vm,
+		 vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  acl_main_t *am = &acl_main;
+  l2_output_next_nodes_st *next_nodes = &am->acl_out_output_next_nodes;
+  u32 n_left_from, *from, *to_next;
+  acl_out_next_t next_index;
+  u32 pkts_acl_checked = 0;
+  u32 feature_bitmap0;
+  u32 cached_sw_if_index = (u32) ~ 0;
+  u32 cached_next_index = (u32) ~ 0;
+  u32 match_acl_index = ~0;
+  u32 match_rule_index = ~0;
+  u32 trace_bitmap = 0;
+
+  from = vlib_frame_vector_args (frame);
+  n_left_from = frame->n_vectors;
+  next_index = node->cached_next_index;
+
+  while (n_left_from > 0)
+    {
+      u32 n_left_to_next;
+
+      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  u32 bi0;
+	  vlib_buffer_t *b0;
+	  u32 next0 = ~0;
+	  u32 next = 0;
+	  u32 sw_if_index0;
+
+	  /* speculatively enqueue b0 to the current next frame */
+	  bi0 = from[0];
+	  to_next[0] = bi0;
+	  from += 1;
+	  to_next += 1;
+	  n_left_from -= 1;
+	  n_left_to_next -= 1;
+
+	  b0 = vlib_get_buffer (vm, bi0);
+
+
+	  sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+	  feature_bitmap0 = vnet_buffer (b0)->l2.feature_bitmap;
+
+	  output_acl_packet_match (sw_if_index0, b0, &next, &match_acl_index,
+				   &match_rule_index, &trace_bitmap);
+	  if (next != ~0)
+	    {
+	      next0 = next;
+	    }
+	  if (next0 == ~0)
+	    {
+	      l2_output_dispatch (vm,
+				  am->vnet_main,
+				  node,
+				  acl_out_node.index,
+				  &cached_sw_if_index,
+				  &cached_next_index,
+				  next_nodes,
+				  b0, sw_if_index0, feature_bitmap0, &next0);
+	    }
+
+
+
+	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+			     && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+	    {
+	      acl_out_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
+	      t->sw_if_index = sw_if_index0;
+	      t->next_index = next0;
+	      t->match_acl_index = match_acl_index;
+	      t->match_rule_index = match_rule_index;
+	      t->trace_bitmap = trace_bitmap;
+	    }
+
+	  pkts_acl_checked += 1;
+
+	  /* verify speculative enqueue, maybe switch current next frame */
+	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+					   to_next, n_left_to_next,
+					   bi0, next0);
+	}
+
+      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+    }
+
+  vlib_node_increment_counter (vm, acl_out_node.index,
+			       ACL_OUT_ERROR_ACL_CHECK, pkts_acl_checked);
+  return frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (acl_out_node) =
+{
+  .function = acl_out_node_fn,.name = "acl-plugin-out",.vector_size =
+    sizeof (u32),.format_trace = format_acl_out_trace,.type =
+    VLIB_NODE_TYPE_INTERNAL,.n_errors =
+    ARRAY_LEN (acl_out_error_strings),.error_strings =
+    acl_out_error_strings,.n_next_nodes = ACL_OUT_N_NEXT,
+    /* edit / add dispositions here */
+    .next_nodes =
+  {
+  [ACL_OUT_ERROR_DROP] = "error-drop",
+      [ACL_OUT_INTERFACE_OUTPUT] = "interface-output",
+      [ACL_OUT_L2S_OUTPUT_IP4_ADD] = "aclp-l2s-output-ip4-add",
+      [ACL_OUT_L2S_OUTPUT_IP6_ADD] = "aclp-l2s-output-ip6-add",}
+,};
diff --git a/plugins/acl-plugin/acl/node_out.h b/plugins/acl-plugin/acl/node_out.h
new file mode 100644
index 00000000000..c919f3b701c
--- /dev/null
+++ b/plugins/acl-plugin/acl/node_out.h
@@ -0,0 +1,12 @@
+#ifndef _NODE_OUT_H_
+#define _NODE_OUT_H_
+
+typedef enum {
+  ACL_OUT_ERROR_DROP,
+  ACL_OUT_INTERFACE_OUTPUT,
+  ACL_OUT_L2S_OUTPUT_IP4_ADD,
+  ACL_OUT_L2S_OUTPUT_IP6_ADD,
+  ACL_OUT_N_NEXT,
+} acl_out_next_t;
+
+#endif
diff --git a/plugins/acl-plugin/configure.ac b/plugins/acl-plugin/configure.ac
new file mode 100644
index 00000000000..a4622c2d6a6
--- /dev/null
+++ b/plugins/acl-plugin/configure.ac
@@ -0,0 +1,9 @@
+AC_INIT(acl_plugin, 1.0)
+LT_INIT
+AM_INIT_AUTOMAKE
+AM_SILENT_RULES([yes])
+AC_PREFIX_DEFAULT([/usr])
+
+AC_PROG_CC
+
+AC_OUTPUT([Makefile])
diff --git a/plugins/acl-plugin/test/run-python b/plugins/acl-plugin/test/run-python
new file mode 100755
index 00000000000..215eb17aa8d
--- /dev/null
+++ b/plugins/acl-plugin/test/run-python
@@ -0,0 +1,28 @@
+#!/bin/sh
+#
+# Do all the legwork to run a scapy shell with APIs available for load
+#
+CURR_DIR=`pwd`
+ROOT_DIR=`git rev-parse --show-toplevel`
+cd $ROOT_DIR
+sudo apt-get install -y python-virtualenv
+# uncomment the line below to enable build of plugins and api each time
+# make plugins && make build-vpp-api || exit
+virtualenv virtualenv
+virtualenv/bin/pip install ipaddress
+virtualenv/bin/pip install scapy
+# install the python API into the virtualenv
+cd $ROOT_DIR/vpp-api/python/
+$ROOT_DIR/virtualenv/bin/python setup.py install
+# install the python ACL plugin API into the virtualenv
+ACL_PLUGIN_SETUP_DIR=`find $ROOT_DIR/build-root -name acl-plugin`
+cd $ACL_PLUGIN_SETUP_DIR; 
+$ROOT_DIR/virtualenv/bin/python setup.py install
+cd $ROOT_DIR
+# figure out the shared library path and start scapy
+export LD_LIBRARY_PATH=`pwd`/`find . -name "libpneum.so" -exec dirname {} \; | grep lib64 | head -n 1`
+cd $CURR_DIR
+sudo LD_LIBRARY_PATH=$LD_LIBRARY_PATH $ROOT_DIR/virtualenv/bin/python $1 $2 $3 $4 $5 $6 $7 $8 $9
+
+
+
diff --git a/plugins/acl-plugin/test/run-scapy b/plugins/acl-plugin/test/run-scapy
new file mode 100755
index 00000000000..266f07d1b1a
--- /dev/null
+++ b/plugins/acl-plugin/test/run-scapy
@@ -0,0 +1,26 @@
+#!/bin/sh
+#
+# Do all the legwork to run a scapy shell with APIs available for load
+#
+ROOT_DIR=`git rev-parse --show-toplevel`
+cd $ROOT_DIR
+sudo apt-get install -y python-virtualenv
+# uncomment the line below to enable the build of plugins and API each time..
+# make plugins && make build-vpp-api || exit
+virtualenv virtualenv
+virtualenv/bin/pip install ipaddress
+virtualenv/bin/pip install scapy
+# install the python API into the virtualenv
+cd $ROOT_DIR/vpp-api/python/
+$ROOT_DIR/virtualenv/bin/python setup.py install
+# install the python ACL plugin API into the virtualenv
+ACL_PLUGIN_SETUP_DIR=`find $ROOT_DIR/build-root -name acl-plugin`
+cd $ACL_PLUGIN_SETUP_DIR; 
+$ROOT_DIR/virtualenv/bin/python setup.py install
+cd $ROOT_DIR
+# figure out the shared library path and start scapy
+export LD_LIBRARY_PATH=`pwd`/`find . -name "libpneum.so" -exec dirname {} \; | grep lib64 | head -n 1`
+sudo LD_LIBRARY_PATH=$LD_LIBRARY_PATH virtualenv/bin/scapy
+
+
+
diff --git a/plugins/acl-plugin/test/test_acl_plugin.py b/plugins/acl-plugin/test/test_acl_plugin.py
new file mode 100644
index 00000000000..7fc72d670a5
--- /dev/null
+++ b/plugins/acl-plugin/test/test_acl_plugin.py
@@ -0,0 +1,118 @@
+from __future__ import print_function
+import unittest, sys, time, threading, struct, logging, os
+import vpp_papi
+# import vpp_papi_plugins.acl
+from ipaddress import *
+papi_event = threading.Event()
+print(vpp_papi.vpe.VL_API_SW_INTERFACE_SET_FLAGS)
+def papi_event_handler(result):
+    if result.vl_msg_id == vpp_papi.vpe.VL_API_SW_INTERFACE_SET_FLAGS:
+        return
+    if result.vl_msg_id == vpp_papi.vpe.VL_API_VNET_INTERFACE_COUNTERS:
+        print('Interface counters', result)
+        return
+    if result.vl_msg_id == vpp_papi.vpe.VL_API_VNET_IP6_FIB_COUNTERS:
+        print('IPv6 FIB counters', result)
+        papi_event.set()
+        return
+
+    print('Unknown message id:', result.vl_msg_id)
+
+import glob, subprocess
+class TestAclPlugin(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        print("Setup")
+    @classmethod
+    def tearDownClass(cls):
+        print("Teardown")
+
+    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_show_version(self):
+        t = vpp_papi.show_version()
+        print('T', t);
+        program = t.program.decode().rstrip('\x00')
+        self.assertEqual('vpe', program)
+
+    def x_test_acl_add(self):
+        print("Test ACL add")
+        self.assertEqual(1, 1)
+    
+    #
+    # Details / Dump
+    #
+    def x_test_details_dump(self):
+        t = vpp_papi.sw_interface_dump(0, b'')
+        print('Dump/details T', t)
+
+    #
+    # Arrays
+    #
+    def x_test_arrays(self):
+        t = vpp_papi.vnet_get_summary_stats()
+        print('Summary stats', t)
+        print('Packets:', t.total_pkts[0])
+        print('Packets:', t.total_pkts[1])
+    #
+    # Variable sized arrays and counters
+    #
+    #@unittest.skip("stats")
+    def x_test_want_stats(self):
+        pid = 123
+        vpp_papi.register_event_callback(papi_event_handler)
+        papi_event.clear()
+
+        # Need to configure IPv6 to get som IPv6 FIB stats
+        t = vpp_papi.create_loopback('')
+        print(t)
+        self.assertEqual(t.retval, 0)
+
+        ifindex = t.sw_if_index
+        addr = str(IPv6Address(u'1::1').packed)
+        t = vpp_papi.sw_interface_add_del_address(ifindex, 1, 1, 0, 16, addr)
+        print(t)
+        self.assertEqual(t.retval, 0)
+
+        # Check if interface is up
+        # XXX: Add new API to query interface state based on ifindex, instead of dump all.
+        t = vpp_papi.sw_interface_set_flags(ifindex, 1, 1, 0)
+        self.assertEqual(t.retval, 0)
+
+        t = vpp_papi.want_stats(True, pid)
+
+        print (t)
+
+        #
+        # Wait for some stats
+        #
+        self.assertEqual(papi_event.wait(15), True)
+        t = vpp_papi.want_stats(False, pid)
+        print (t)
+
+
+    #
+    # Plugins?
+    #
+
+if __name__ == '__main__' or __name__ == '__builtin__':
+    print("This is main")
+    suite = unittest.TestLoader().loadTestsFromTestCase(TestAclPlugin)
+    unittest.TextTestRunner(verbosity=2).run(suite)
+    #logging.basicConfig(level=logging.DEBUG)
+    # unittest.main()
+
diff --git a/plugins/configure.ac b/plugins/configure.ac
index cf58bf75518..6e7d5b8ad1e 100644
--- a/plugins/configure.ac
+++ b/plugins/configure.ac
@@ -59,6 +59,7 @@ PLUGIN_ENABLED(snat)
 PLUGIN_ENABLED(ila)
 PLUGIN_ENABLED(lb)
 PLUGIN_ENABLED(flowperpkt)
+PLUGIN_ENABLED(acl)
 
 # Disabled plugins, require --enable-XXX-plugin
 PLUGIN_DISABLED(vcgn)