misc: deprecate gbp and its dependents

Type: improvement

Signed-off-by: Neale Ranns <nranns@cisco.com>
Signed-off-by: Benoît Ganne <bganne@cisco.com>
Change-Id: I2f30a4f04fd9a8635ce2d259b5fd5b0c85cee8c3

6 files changed, 721 insertions, 0 deletions

diff --git a/extras/deprecated/plugins/l2e/CMakeLists.txt b/extras/deprecated/plugins/l2e/CMakeLists.txt
new file mode 100644
index 00000000000..2bfb05a43e6
--- /dev/null
+++ b/extras/deprecated/plugins/l2e/CMakeLists.txt
@@ -0,0 +1,28 @@
+# Copyright (c) 2018 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.
+
+add_vpp_plugin(l2e
+  SOURCES
+  l2e_node.c
+  l2e_api.c
+  l2e.c
+
+  MULTIARCH_SOURCES
+  l2e_node.c
+
+  API_FILES
+  l2e.api
+
+  INSTALL_HEADERS
+  l2e.h
+)
diff --git a/extras/deprecated/plugins/l2e/l2e.api b/extras/deprecated/plugins/l2e/l2e.api
new file mode 100644
index 00000000000..586e2bae5ca
--- /dev/null
+++ b/extras/deprecated/plugins/l2e/l2e.api
@@ -0,0 +1,39 @@
+/* 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.
+ */
+
+option version = "1.0.0";
+import "vnet/interface_types.api";
+
+/** \brief L2 emulation at L3
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param sw_if_index - interface the operation is applied to
+    @param enable - Turn the service on or off
+*/
+autoreply define l2_emulation
+{
+  option status="in_progress";
+  u32 client_index;
+  u32 context;
+  vl_api_interface_index_t sw_if_index;
+  bool enable;
+};
+
+/*
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/extras/deprecated/plugins/l2e/l2e.c b/extras/deprecated/plugins/l2e/l2e.c
new file mode 100644
index 00000000000..4c6eac50446
--- /dev/null
+++ b/extras/deprecated/plugins/l2e/l2e.c
@@ -0,0 +1,198 @@
+/*
+ * l2e.c : Extract L3 packets from the L2 input and feed
+ *                   them into the L3 path.
+ *
+ * Copyright (c) 2013 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 <plugins/l2e/l2e.h>
+#include <vnet/l2/l2_input.h>
+#include <vnet/l2/feat_bitmap.h>
+#include <vnet/ip/ip.h>
+
+l2_emulation_main_t l2_emulation_main;
+
+/**
+ * A zero'd out struct we can use in the vec_validate
+ */
+static const l2_emulation_t ezero = { };
+
+__clib_export void
+l2_emulation_enable (u32 sw_if_index)
+{
+  l2_emulation_main_t *em = &l2_emulation_main;
+  vec_validate_init_empty (em->l2_emulations, sw_if_index, ezero);
+
+  l2_emulation_t *l23e = &em->l2_emulations[sw_if_index];
+
+  l23e->enabled = 1;
+
+  /*
+   * L3 enable the interface - using IP unnumbered from the control
+   * plane may not be possible since there may be no BVI interface
+   * to which to unnumber
+   */
+  ip4_sw_interface_enable_disable (sw_if_index, 1);
+  ip6_sw_interface_enable_disable (sw_if_index, 1);
+
+  l2input_intf_bitmap_enable (sw_if_index, L2INPUT_FEAT_L2_EMULATION, 1);
+}
+
+
+__clib_export void
+l2_emulation_disable (u32 sw_if_index)
+{
+  l2_emulation_main_t *em = &l2_emulation_main;
+  if (vec_len (em->l2_emulations) >= sw_if_index)
+    {
+      l2_emulation_t *l23e = &em->l2_emulations[sw_if_index];
+      clib_memset (l23e, 0, sizeof (*l23e));
+
+      l2input_intf_bitmap_enable (sw_if_index, L2INPUT_FEAT_L2_EMULATION, 0);
+      ip4_sw_interface_enable_disable (sw_if_index, 0);
+      ip6_sw_interface_enable_disable (sw_if_index, 0);
+    }
+}
+
+static clib_error_t *
+l2_emulation_interface_add_del (vnet_main_t * vnm,
+				u32 sw_if_index, u32 is_add)
+{
+  l2_emulation_main_t *em = &l2_emulation_main;
+  if (is_add)
+    {
+      vec_validate_init_empty (em->l2_emulations, sw_if_index, ezero);
+    }
+
+  return (NULL);
+}
+
+VNET_SW_INTERFACE_ADD_DEL_FUNCTION (l2_emulation_interface_add_del);
+
+static clib_error_t *
+l2_emulation_cli (vlib_main_t * vm,
+		  unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+  vnet_main_t *vnm = vnet_get_main ();
+  u32 sw_if_index = ~0;
+  u8 enable = 1;
+
+  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (input, "%U", unformat_vnet_sw_interface,
+		    vnm, &sw_if_index))
+	;
+      else if (unformat (input, "enable"))
+	enable = 1;
+      else if (unformat (input, "disable"))
+	enable = 0;
+      else
+	break;
+    }
+
+  if (~0 == sw_if_index)
+    return clib_error_return (0, "interface must be specified");
+
+  if (enable)
+    l2_emulation_enable (sw_if_index);
+  else
+    l2_emulation_disable (sw_if_index);
+
+  return (NULL);
+}
+
+/*?
+ * Configure l2 emulation.
+ *  When the interface is in L2 mode, configure the extraction of L3
+ *  packets out of the L2 path and into the L3 path.
+ *
+ * @cliexpar
+ * @cliexstart{set interface l2 input l2-emulation <interface-name> [disable]}
+ * @cliexend
+ ?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (l2_emulation_cli_node, static) = {
+  .path = "set interface l2 l2-emulation",
+  .short_help =
+  "set interface l2 l2-emulation <interface-name> [disable|enable]\n",
+  .function = l2_emulation_cli,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+l2_emulation_show (vlib_main_t * vm,
+		   unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+  l2_emulation_main_t *em = &l2_emulation_main;
+  vnet_main_t *vnm = vnet_get_main ();
+  l2_emulation_t *l23e;
+  u32 sw_if_index;
+
+  vec_foreach_index (sw_if_index, em->l2_emulations)
+  {
+    l23e = &em->l2_emulations[sw_if_index];
+    if (l23e->enabled)
+      {
+	vlib_cli_output (vm, "%U\n",
+			 format_vnet_sw_if_index_name, vnm, sw_if_index);
+      }
+  }
+  return (NULL);
+}
+
+/*?
+ * Show l2 emulation.
+ *  When the interface is in L2 mode, configure the extraction of L3
+ *  packets out of the L2 path and into the L3 path.
+ *
+ * @cliexpar
+ * @cliexstart{show interface l2 l2-emulation}
+ * @cliexend
+ ?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (l2_emulation_show_node, static) = {
+  .path = "show interface l2 l2-emulation",
+  .short_help = "show interface l2 l2-emulation\n",
+  .function = l2_emulation_show,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+l2_emulation_init (vlib_main_t * vm)
+{
+  l2_emulation_main_t *em = &l2_emulation_main;
+  vlib_node_t *node;
+
+  node = vlib_get_node_by_name (vm, (u8 *) "l2-emulation");
+  em->l2_emulation_node_index = node->index;
+
+  /* Initialize the feature next-node indexes */
+  feat_bitmap_init_next_nodes (vm,
+			       em->l2_emulation_node_index,
+			       L2INPUT_N_FEAT,
+			       l2input_get_feat_names (),
+			       em->l2_input_feat_next);
+
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (l2_emulation_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/extras/deprecated/plugins/l2e/l2e.h b/extras/deprecated/plugins/l2e/l2e.h
new file mode 100644
index 00000000000..e548d333f9d
--- /dev/null
+++ b/extras/deprecated/plugins/l2e/l2e.h
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2013 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_vnet_l2_emulation_h
+#define included_vnet_l2_emulation_h
+
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+
+/**
+ * Per-interface L2 configuration
+ */
+typedef struct l2_emulation_t_
+{
+  /**
+   * Enabled or Disabled.
+   *  this is required since one L3 protocl can be enabled, but others not
+   */
+  u8 enabled;
+} l2_emulation_t;
+
+/**
+ * per-packet trace data
+ */
+typedef struct l2_emulation_trace_t_
+{
+  /* per-pkt trace data */
+  u8 extracted;
+} l2_emulation_trace_t;
+
+/**
+ * Grouping of global data for the L2 emulation feature
+ */
+typedef struct l2_emulation_main_t_
+{
+  u16 msg_id_base;
+
+  u32 l2_emulation_node_index;
+
+  /**
+   * Per-interface vector of emulation configs
+   */
+  l2_emulation_t *l2_emulations;
+
+  /**
+   * Next nodes for L2 output features
+   */
+  u32 l2_input_feat_next[32];
+} l2_emulation_main_t;
+
+/**
+ * L2 Emulation is a feautre that is applied to L2 ports to 'extract'
+ * IP packets from the L2 path and inject them into the L3 path (i.e.
+ * into the appropriate ip[4|6]_input node).
+ * L3 routes in the table_id for that interface should then be configured
+ * as DVR routes, therefore the forwarded packet has the L2 header
+ * preserved and togehter the L3 routed system behaves like an L2 bridge.
+ */
+extern void l2_emulation_enable (u32 sw_if_index);
+extern void l2_emulation_disable (u32 sw_if_index);
+
+extern l2_emulation_main_t l2_emulation_main;
+
+#endif
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/extras/deprecated/plugins/l2e/l2e_api.c b/extras/deprecated/plugins/l2e/l2e_api.c
new file mode 100644
index 00000000000..fe2fb7ee06e
--- /dev/null
+++ b/extras/deprecated/plugins/l2e/l2e_api.c
@@ -0,0 +1,89 @@
+/*
+ *------------------------------------------------------------------
+ * l2e_api.c - layer 2 emulation api
+ *
+ * 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 <vnet/interface.h>
+#include <vnet/api_errno.h>
+#include <vpp/app/version.h>
+
+#include <l2e/l2e.h>
+
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+
+/* define message IDs */
+#include <l2e/l2e.api_enum.h>
+#include <l2e/l2e.api_types.h>
+
+#include <vlibapi/api_helper_macros.h>
+
+#define L2E_MSG_BASE l2em->msg_id_base
+
+static void
+vl_api_l2_emulation_t_handler (vl_api_l2_emulation_t * mp)
+{
+  l2_emulation_main_t *l2em = &l2_emulation_main;
+  vl_api_l2_emulation_reply_t *rmp;
+  int rv = 0;
+
+  VALIDATE_SW_IF_INDEX (mp);
+
+  u32 sw_if_index = ntohl (mp->sw_if_index);
+
+  if (mp->enable)
+    l2_emulation_enable (sw_if_index);
+  else
+    l2_emulation_disable (sw_if_index);
+
+  BAD_SW_IF_INDEX_LABEL;
+
+  REPLY_MACRO (VL_API_L2_EMULATION_REPLY + L2E_MSG_BASE);
+}
+
+#include <l2e/l2e.api.c>
+static clib_error_t *
+l2e_init (vlib_main_t * vm)
+{
+  l2_emulation_main_t *l2em = &l2_emulation_main;
+
+  /* Ask for a correctly-sized block of API message decode slots */
+  l2em->msg_id_base = setup_message_id_table ();
+
+  return (NULL);
+}
+
+VLIB_API_INIT_FUNCTION (l2e_init);
+
+/* *INDENT-OFF* */
+VLIB_PLUGIN_REGISTER () = {
+    .version = VPP_BUILD_VER,
+    .description = "Layer 2 (L2) Emulation",
+};
+/* *INDENT-ON* */
+
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/extras/deprecated/plugins/l2e/l2e_node.c b/extras/deprecated/plugins/l2e/l2e_node.c
new file mode 100644
index 00000000000..71c9b4bc6af
--- /dev/null
+++ b/extras/deprecated/plugins/l2e/l2e_node.c
@@ -0,0 +1,283 @@
+/*
+ * l2e_node.c : l2 emulation node
+ *
+ * Copyright (c) 2019 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 <plugins/l2e/l2e.h>
+#include <vnet/l2/l2_input.h>
+#include <vnet/l2/feat_bitmap.h>
+
+#define foreach_l2_emulation                    \
+  _(IP4, "Extract IPv4")                        \
+  _(IP6, "Extract IPv6")
+
+typedef enum
+{
+#define _(sym,str) L2_EMULATION_ERROR_##sym,
+  foreach_l2_emulation
+#undef _
+    L2_EMULATION_N_ERROR,
+} l2_emulation_error_t;
+
+static char *l2_emulation_error_strings[] = {
+#define _(sym,string) string,
+  foreach_l2_emulation
+#undef _
+};
+
+typedef enum
+{
+#define _(sym,str) L2_EMULATION_NEXT_##sym,
+  foreach_l2_emulation
+#undef _
+    L2_EMULATION_N_NEXT,
+} l2_emulation_next_t;
+
+/* packet trace format function */
+static u8 *
+format_l2_emulation_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 *);
+  l2_emulation_trace_t *t = va_arg (*args, l2_emulation_trace_t *);
+
+  s = format (s, "l2-emulation: %s", (t->extracted ? "yes" : "no"));
+
+  return s;
+}
+
+VLIB_NODE_FN (l2_emulation_node) (vlib_main_t * vm,
+				  vlib_node_runtime_t * node,
+				  vlib_frame_t * frame)
+{
+  l2_emulation_main_t *em = &l2_emulation_main;
+  u32 n_left_from, *from, *to_next;
+  l2_emulation_next_t next_index;
+  u32 ip4_hits = 0;
+  u32 ip6_hits = 0;
+
+  next_index = 0;
+  n_left_from = frame->n_vectors;
+  from = vlib_frame_vector_args (frame);
+
+  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 >= 4 && n_left_to_next >= 2)
+	{
+	  vlib_buffer_t *b0, *b1;
+	  u32 sw_if_index0, sw_if_index1;
+	  u16 ether_type0, ether_type1;
+	  u32 next0 = ~0, next1 = ~0;
+	  u8 l2_len0, l2_len1;
+	  u32 bi0, bi1;
+	  u8 *h0, *h1;
+
+	  bi0 = to_next[0] = from[0];
+	  bi1 = to_next[1] = from[1];
+
+	  from += 2;
+	  n_left_from -= 2;
+	  to_next += 2;
+	  n_left_to_next -= 2;
+
+	  b0 = vlib_get_buffer (vm, bi0);
+	  b1 = vlib_get_buffer (vm, bi1);
+	  l2_len0 = vnet_buffer (b0)->l2.l2_len;
+	  l2_len1 = vnet_buffer (b1)->l2.l2_len;
+
+	  h0 = vlib_buffer_get_current (b0);
+	  h1 = vlib_buffer_get_current (b1);
+
+	  ether_type0 = clib_net_to_host_u16 (*(u16 *) (h0 + l2_len0 - 2));
+	  ether_type1 = clib_net_to_host_u16 (*(u16 *) (h1 + l2_len1 - 2));
+	  sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+	  sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
+
+	  /*
+	   * only extract unicast
+	   */
+	  if (PREDICT_TRUE (!(h0[0] & 0x1)))
+	    {
+	      switch (ether_type0)
+		{
+		case ETHERNET_TYPE_IP4:
+		  ASSERT (em->l2_emulations[sw_if_index0].enabled);
+		  ++ip4_hits;
+		  next0 = L2_EMULATION_NEXT_IP4;
+		  vlib_buffer_advance (b0, l2_len0);
+		  break;
+		case ETHERNET_TYPE_IP6:
+		  ASSERT (em->l2_emulations[sw_if_index0].enabled);
+		  ++ip6_hits;
+		  next0 = L2_EMULATION_NEXT_IP6;
+		  vlib_buffer_advance (b0, l2_len0);
+		default:
+		  break;
+		}
+	    }
+	  if (PREDICT_TRUE (!(h1[0] & 0x1)))
+	    {
+	      switch (ether_type1)
+		{
+		case ETHERNET_TYPE_IP4:
+		  ASSERT (em->l2_emulations[sw_if_index1].enabled);
+		  ++ip4_hits;
+		  next1 = L2_EMULATION_NEXT_IP4;
+		  vlib_buffer_advance (b1, l2_len1);
+		  break;
+		case ETHERNET_TYPE_IP6:
+		  ASSERT (em->l2_emulations[sw_if_index1].enabled);
+		  ++ip6_hits;
+		  next1 = L2_EMULATION_NEXT_IP6;
+		  vlib_buffer_advance (b1, l2_len1);
+		default:
+		  break;
+		}
+	    }
+	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+			     && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+	    {
+	      l2_emulation_trace_t *t =
+		vlib_add_trace (vm, node, b0, sizeof (*t));
+	      t->extracted = (next0 != ~0);
+	    }
+	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+			     && (b1->flags & VLIB_BUFFER_IS_TRACED)))
+	    {
+	      l2_emulation_trace_t *t =
+		vlib_add_trace (vm, node, b1, sizeof (*t));
+	      t->extracted = (next1 != ~0);
+	    }
+
+	  /* Determine the next node and remove ourself from bitmap */
+	  if (PREDICT_TRUE (next0 == ~0))
+	    next0 = vnet_l2_feature_next (b0, em->l2_input_feat_next,
+					  L2INPUT_FEAT_L2_EMULATION);
+
+	  /* Determine the next node and remove ourself from bitmap */
+	  if (PREDICT_TRUE (next1 == ~0))
+	    next1 = vnet_l2_feature_next (b1, em->l2_input_feat_next,
+					  L2INPUT_FEAT_L2_EMULATION);
+
+	  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+					   to_next, n_left_to_next,
+					   bi0, bi1, next0, next1);
+	}
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  vlib_buffer_t *b0;
+	  u32 sw_if_index0;
+	  u16 ether_type0;
+	  u32 next0 = ~0;
+	  u8 l2_len0;
+	  u32 bi0;
+	  u8 *h0;
+
+	  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);
+	  l2_len0 = vnet_buffer (b0)->l2.l2_len;
+
+	  h0 = vlib_buffer_get_current (b0);
+	  ether_type0 = clib_net_to_host_u16 (*(u16 *) (h0 + l2_len0 - 2));
+	  sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+
+	  /*
+	   * only extract unicast
+	   */
+	  if (PREDICT_TRUE (!(h0[0] & 0x1)))
+	    {
+	      switch (ether_type0)
+		{
+		case ETHERNET_TYPE_IP4:
+		  ASSERT (em->l2_emulations[sw_if_index0].enabled);
+		  ++ip4_hits;
+		  next0 = L2_EMULATION_NEXT_IP4;
+		  vlib_buffer_advance (b0, l2_len0);
+		  break;
+		case ETHERNET_TYPE_IP6:
+		  ASSERT (em->l2_emulations[sw_if_index0].enabled);
+		  ++ip6_hits;
+		  next0 = L2_EMULATION_NEXT_IP6;
+		  vlib_buffer_advance (b0, l2_len0);
+		default:
+		  break;
+		}
+	    }
+
+	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+			     && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+	    {
+	      l2_emulation_trace_t *t =
+		vlib_add_trace (vm, node, b0, sizeof (*t));
+	      t->extracted = (next0 != ~0);
+	    }
+
+	  /* Determine the next node and remove ourself from bitmap */
+	  if (PREDICT_TRUE (next0 == ~0))
+	    next0 = vnet_l2_feature_next (b0, em->l2_input_feat_next,
+					  L2INPUT_FEAT_L2_EMULATION);
+
+	  /* 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,
+			       L2_EMULATION_ERROR_IP4, ip4_hits);
+  vlib_node_increment_counter (vm, node->node_index,
+			       L2_EMULATION_ERROR_IP6, ip6_hits);
+
+  return frame->n_vectors;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (l2_emulation_node) = {
+  .name = "l2-emulation",
+  .vector_size = sizeof (u32),
+  .format_trace = format_l2_emulation_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = ARRAY_LEN(l2_emulation_error_strings),
+  .error_strings = l2_emulation_error_strings,
+
+  .n_next_nodes = L2_EMULATION_N_NEXT,
+
+  /* edit / add dispositions here */
+  .next_nodes = {
+    [L2_EMULATION_NEXT_IP4] = "ip4-input",
+    [L2_EMULATION_NEXT_IP6] = "ip6-input",
+  },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */