Add L2 flow-record generation

Change-Id: I32a9513f2b66d35e0abe2aeb6eb86a4729ba7f74
Signed-off-by: Dave Barach <dave@barachs.net>

7 files changed, 881 insertions, 161 deletions

diff --git a/plugins/flowperpkt-plugin/Makefile.am b/plugins/flowperpkt-plugin/Makefile.am
index 1df758ed6f4..9354e26faa2 100644
--- a/plugins/flowperpkt-plugin/Makefile.am
+++ b/plugins/flowperpkt-plugin/Makefile.am
@@ -24,6 +24,7 @@ vppplugins_LTLIBRARIES = flowperpkt_plugin.la
 vppapitestplugins_LTLIBRARIES = flowperpkt_test_plugin.la
 
 flowperpkt_plugin_la_SOURCES = flowperpkt/flowperpkt.c  \
+        flowperpkt/l2_node.c \
         flowperpkt/node.c \
 	flowperpkt/flowperpkt_plugin.api.h
 flowperpkt_plugin_la_LDFLAGS = -module
diff --git a/plugins/flowperpkt-plugin/flowperpkt/flowperpkt.api b/plugins/flowperpkt-plugin/flowperpkt/flowperpkt.api
index 8933b5852f4..fa878f21ed3 100644
--- a/plugins/flowperpkt-plugin/flowperpkt/flowperpkt.api
+++ b/plugins/flowperpkt-plugin/flowperpkt/flowperpkt.api
@@ -22,7 +22,7 @@ manual_print define flowperpkt_tx_interface_add_del
 
   /* Enable / disable the feature */
   u8 is_add;
-  u8 is_ipv6;
+  u8 which;  /* 0 = ipv4, 1 = l2, 2 = ipv6 (not yet implemented) */
 
   /* Interface handle */
   u32 sw_if_index;
diff --git a/plugins/flowperpkt-plugin/flowperpkt/flowperpkt.c b/plugins/flowperpkt-plugin/flowperpkt/flowperpkt.c
index 96c930ae599..fb71d5b0ffc 100644
--- a/plugins/flowperpkt-plugin/flowperpkt/flowperpkt.c
+++ b/plugins/flowperpkt-plugin/flowperpkt/flowperpkt.c
@@ -57,13 +57,21 @@ flowperpkt_main_t flowperpkt_main;
 #include <flowperpkt/flowperpkt_all_api_h.h>
 #undef vl_api_version
 
-/* Define the per-interface configurable feature */
+/* Define the per-interface configurable features */
 /* *INDENT-OFF* */
-VNET_FEATURE_INIT (flow_perpacket, static) = {
+VNET_FEATURE_INIT (flow_perpacket_ipv4, static) =
+{
   .arc_name = "ip4-output",
-  .node_name = "flowperpkt",
+  .node_name = "flowperpkt-ipv4",
   .runs_before = VNET_FEATURES ("interface-output"),
 };
+
+VNET_FEATURE_INIT (flow_perpacket_l2, static) =
+{
+  .arc_name = "interface-output",
+  .node_name = "flowperpkt-l2",
+  .runs_before = VNET_FEATURES ("interface-tx"),
+};
 /* *INDENT-ON* */
 
 /*
@@ -120,11 +128,12 @@ bad_sw_if_index:                                \
  * @param collector_port u16 the collector port we should use, host byte order
  * @returns u8 * vector containing the indicated IPFIX template packet
  */
-u8 *
-flowperpkt_template_rewrite (flow_report_main_t * frm,
-			     flow_report_t * fr,
-			     ip4_address_t * collector_address,
-			     ip4_address_t * src_address, u16 collector_port)
+static inline u8 *
+flowperpkt_template_rewrite_inline (flow_report_main_t * frm,
+				    flow_report_t * fr,
+				    ip4_address_t * collector_address,
+				    ip4_address_t * src_address,
+				    u16 collector_port, int variant)
 {
   ip4_header_t *ip;
   udp_header_t *udp;
@@ -137,32 +146,64 @@ flowperpkt_template_rewrite (flow_report_main_t * frm,
   ip4_ipfix_template_packet_t *tp;
   u32 field_count = 0;
   flow_report_stream_t *stream;
+  flowperpkt_main_t *fm = &flowperpkt_main;
 
   stream = &frm->streams[fr->stream_index];
 
-  /*
-   * Supported Fields:
-   *
-   * ingressInterface, TLV type 10, u32
-   * egressInterface, TLV type 14, u32
-   * sourceIpv4Address, TLV type 8, u32
-   * destinationIPv4Address, TLV type 12, u32
-   * ipClassOfService, TLV type 5, u8
-   * flowStartNanoseconds, TLV type 156, dateTimeNanoseconds (f64)
-   *   Implementation: f64 nanoseconds since VPP started
-   *   warning: wireshark doesn't really understand this TLV
-   * dataLinkFrameSize, TLV type 312, u16
-   *   warning: wireshark doesn't understand this TLV at all
-   */
-
-  /* Currently 7 fields */
-  field_count += 7;
-
-  /* allocate rewrite space */
-  vec_validate_aligned (rewrite,
-			sizeof (ip4_ipfix_template_packet_t)
-			+ field_count * sizeof (ipfix_field_specifier_t) - 1,
-			CLIB_CACHE_LINE_BYTES);
+  if (variant == FLOW_VARIANT_IPV4)
+    {
+      /*
+       * ip4 Supported Fields:
+       *
+       * ingressInterface, TLV type 10, u32
+       * egressInterface, TLV type 14, u32
+       * sourceIpv4Address, TLV type 8, u32
+       * destinationIPv4Address, TLV type 12, u32
+       * ipClassOfService, TLV type 5, u8
+       * flowStartNanoseconds, TLV type 156, dateTimeNanoseconds (f64)
+       *   Implementation: f64 nanoseconds since VPP started
+       *   warning: wireshark doesn't really understand this TLV
+       * dataLinkFrameSize, TLV type 312, u16
+       *   warning: wireshark doesn't understand this TLV at all
+       */
+
+      /* Currently 7 fields */
+      field_count += 7;
+
+      /* allocate rewrite space */
+      vec_validate_aligned
+	(rewrite,
+	 sizeof (ip4_ipfix_template_packet_t)
+	 + field_count * sizeof (ipfix_field_specifier_t) - 1,
+	 CLIB_CACHE_LINE_BYTES);
+    }
+  else if (variant == FLOW_VARIANT_L2)
+    {
+      /*
+       * L2 Supported Fields:
+       *
+       * ingressInterface, TLV type 10, u32
+       * egressInterface, TLV type 14, u32
+       * sourceMacAddress, TLV type 56, u8[6] we hope
+       * destinationMacAddress, TLV type 57, u8[6] we hope
+       * ethernetType, TLV type 256, u16
+       * flowStartNanoseconds, TLV type 156, dateTimeNanoseconds (f64)
+       *   Implementation: f64 nanoseconds since VPP started
+       *   warning: wireshark doesn't really understand this TLV
+       * dataLinkFrameSize, TLV type 312, u16
+       *   warning: wireshark doesn't understand this TLV at all
+       */
+
+      /* Currently 7 fields */
+      field_count += 7;
+
+      /* allocate rewrite space */
+      vec_validate_aligned
+	(rewrite,
+	 sizeof (ip4_ipfix_template_packet_t)
+	 + field_count * sizeof (ipfix_field_specifier_t) - 1,
+	 CLIB_CACHE_LINE_BYTES);
+    }
 
   tp = (ip4_ipfix_template_packet_t *) rewrite;
   ip = (ip4_header_t *) & tp->ip4;
@@ -186,28 +227,66 @@ flowperpkt_template_rewrite (flow_report_main_t * frm,
   h->domain_id = clib_host_to_net_u32 (stream->domain_id);
 
   /* Add TLVs to the template */
-  f->e_id_length = ipfix_e_id_length (0 /* enterprise */ , ingressInterface,
-				      4);
-  f++;
-  f->e_id_length = ipfix_e_id_length (0 /* enterprise */ , egressInterface,
-				      4);
-  f++;
-  f->e_id_length = ipfix_e_id_length (0 /* enterprise */ , sourceIPv4Address,
-				      4);
-  f++;
-  f->e_id_length = ipfix_e_id_length (0 /* enterprise */ ,
-				      destinationIPv4Address, 4);
-  f++;
-  f->e_id_length = ipfix_e_id_length (0 /* enterprise */ , ipClassOfService,
-				      1);
-  f++;
-  f->e_id_length =
-    ipfix_e_id_length (0 /* enterprise */ , flowStartNanoseconds,
-		       8);
-  f++;
-  f->e_id_length = ipfix_e_id_length (0 /* enterprise */ , dataLinkFrameSize,
-				      2);
-  f++;
+  if (variant == FLOW_VARIANT_IPV4)
+    {
+      f->e_id_length =
+	ipfix_e_id_length (0 /* enterprise */ , ingressInterface,
+			   4);
+      f++;
+      f->e_id_length =
+	ipfix_e_id_length (0 /* enterprise */ , egressInterface,
+			   4);
+      f++;
+      f->e_id_length =
+	ipfix_e_id_length (0 /* enterprise */ , sourceIPv4Address,
+			   4);
+      f++;
+      f->e_id_length =
+	ipfix_e_id_length (0 /* enterprise */ , destinationIPv4Address, 4);
+      f++;
+      f->e_id_length =
+	ipfix_e_id_length (0 /* enterprise */ , ipClassOfService,
+			   1);
+      f++;
+      f->e_id_length =
+	ipfix_e_id_length (0 /* enterprise */ , flowStartNanoseconds,
+			   8);
+      f++;
+      f->e_id_length =
+	ipfix_e_id_length (0 /* enterprise */ , dataLinkFrameSize,
+			   2);
+      f++;
+    }
+  else if (variant == FLOW_VARIANT_L2)
+    {
+      f->e_id_length =
+	ipfix_e_id_length (0 /* enterprise */ , ingressInterface,
+			   4);
+      f++;
+      f->e_id_length =
+	ipfix_e_id_length (0 /* enterprise */ , egressInterface,
+			   4);
+      f++;
+      f->e_id_length =
+	ipfix_e_id_length (0 /* enterprise */ , sourceMacAddress,
+			   6);
+      f++;
+      f->e_id_length =
+	ipfix_e_id_length (0 /* enterprise */ , destinationMacAddress, 6);
+      f++;
+      f->e_id_length = ipfix_e_id_length (0 /* enterprise */ , ethernetType,
+					  2);
+      f++;
+      f->e_id_length =
+	ipfix_e_id_length (0 /* enterprise */ , flowStartNanoseconds,
+			   8);
+      f++;
+      f->e_id_length =
+	ipfix_e_id_length (0 /* enterprise */ , dataLinkFrameSize,
+			   2);
+      f++;
+    }
+
   /* Extend in the obvious way, right here... */
 
   /* Back to the template packet... */
@@ -218,6 +297,11 @@ flowperpkt_template_rewrite (flow_report_main_t * frm,
   /* Field count in this template */
   t->id_count = ipfix_id_count (fr->template_id, f - first_field);
 
+  if (variant == FLOW_VARIANT_IPV4)
+    fm->ipv4_report_id = fr->template_id;
+  else if (variant == FLOW_VARIANT_L2)
+    fm->l2_report_id = fr->template_id;
+
   /* set length in octets */
   s->set_id_length =
     ipfix_set_id_length (2 /* set_id */ , (u8 *) f - (u8 *) s);
@@ -231,6 +315,31 @@ flowperpkt_template_rewrite (flow_report_main_t * frm,
   return rewrite;
 }
 
+u8 *
+flowperpkt_template_rewrite_ipv4 (flow_report_main_t * frm,
+				  flow_report_t * fr,
+				  ip4_address_t * collector_address,
+				  ip4_address_t * src_address,
+				  u16 collector_port)
+{
+  return flowperpkt_template_rewrite_inline
+    (frm, fr, collector_address, src_address, collector_port,
+     FLOW_VARIANT_IPV4);
+}
+
+u8 *
+flowperpkt_template_rewrite_l2 (flow_report_main_t * frm,
+				flow_report_t * fr,
+				ip4_address_t * collector_address,
+				ip4_address_t * src_address,
+				u16 collector_port)
+{
+  return flowperpkt_template_rewrite_inline
+    (frm, fr, collector_address, src_address, collector_port,
+     FLOW_VARIANT_L2);
+}
+
+
 /**
  * @brief Flush accumulated data
  * @param frm flow_report_main_t *
@@ -242,11 +351,21 @@ flowperpkt_template_rewrite (flow_report_main_t * frm,
  * will be sent.
  */
 vlib_frame_t *
-flowperpkt_data_callback (flow_report_main_t * frm,
-			  flow_report_t * fr,
-			  vlib_frame_t * f, u32 * to_next, u32 node_index)
+flowperpkt_data_callback_ipv4 (flow_report_main_t * frm,
+			       flow_report_t * fr,
+			       vlib_frame_t * f, u32 * to_next,
+			       u32 node_index)
+{
+  flowperpkt_flush_callback_ipv4 ();
+  return f;
+}
+
+vlib_frame_t *
+flowperpkt_data_callback_l2 (flow_report_main_t * frm,
+			     flow_report_t * fr,
+			     vlib_frame_t * f, u32 * to_next, u32 node_index)
 {
-  flowperpkt_flush_callback ();
+  flowperpkt_flush_callback_l2 ();
   return f;
 }
 
@@ -259,21 +378,21 @@ flowperpkt_data_callback (flow_report_main_t * frm,
  */
 
 static int flowperpkt_tx_interface_add_del_feature
-  (flowperpkt_main_t * fm, u32 sw_if_index, int is_add)
+  (flowperpkt_main_t * fm, u32 sw_if_index, int which, int is_add)
 {
   flow_report_main_t *frm = &flow_report_main;
   vnet_flow_report_add_del_args_t _a, *a = &_a;
   int rv;
 
-  if (!fm->report_created)
+  if (which == FLOW_VARIANT_IPV4 && !fm->ipv4_report_created)
     {
       memset (a, 0, sizeof (*a));
-      a->rewrite_callback = flowperpkt_template_rewrite;
-      a->flow_data_callback = flowperpkt_data_callback;
+      a->rewrite_callback = flowperpkt_template_rewrite_ipv4;
+      a->flow_data_callback = flowperpkt_data_callback_ipv4;
       a->is_add = 1;
       a->domain_id = 1;		/*$$$$ config parameter */
       a->src_port = 4739;	/*$$$$ config parameter */
-      fm->report_created = 1;
+      fm->ipv4_report_created = 1;
 
       rv = vnet_flow_report_add_del (frm, a);
       if (rv)
@@ -282,9 +401,30 @@ static int flowperpkt_tx_interface_add_del_feature
 	  return -1;
 	}
     }
+  else if (which == FLOW_VARIANT_L2 && !fm->l2_report_created)
+    {
+      memset (a, 0, sizeof (*a));
+      a->rewrite_callback = flowperpkt_template_rewrite_l2;
+      a->flow_data_callback = flowperpkt_data_callback_l2;
+      a->is_add = 1;
+      a->domain_id = 1;		/*$$$$ config parameter */
+      a->src_port = 4739;	/*$$$$ config parameter */
+      fm->l2_report_created = 1;
 
-  vnet_feature_enable_disable ("ip4-output", "flowperpkt", sw_if_index,
-			       is_add, 0, 0);
+      rv = vnet_flow_report_add_del (frm, a);
+      if (rv)
+	{
+	  clib_warning ("vnet_flow_report_add_del returned %d", rv);
+	  return -1;
+	}
+    }
+
+  if (which == FLOW_VARIANT_IPV4)
+    vnet_feature_enable_disable ("ip4-output", "flowperpkt-ipv4",
+				 sw_if_index, is_add, 0, 0);
+  else if (which == FLOW_VARIANT_L2)
+    vnet_feature_enable_disable ("interface-output", "flowperpkt-l2",
+				 sw_if_index, is_add, 0, 0);
 
   return 0;
 }
@@ -303,8 +443,15 @@ void vl_api_flowperpkt_tx_interface_add_del_t_handler
 
   VALIDATE_SW_IF_INDEX (mp);
 
-  rv = flowperpkt_tx_interface_add_del_feature (fm, sw_if_index, mp->is_add);
+  if (mp->which != FLOW_VARIANT_IPV4 && mp->which != FLOW_VARIANT_L2)
+    {
+      rv = VNET_API_ERROR_UNIMPLEMENTED;
+      goto out;
+    }
 
+  rv = flowperpkt_tx_interface_add_del_feature (fm, sw_if_index, mp->which,
+						mp->is_add);
+out:
   BAD_SW_IF_INDEX_LABEL;
 
   REPLY_MACRO (VL_API_FLOWPERPKT_TX_INTERFACE_ADD_DEL_REPLY);
@@ -322,9 +469,9 @@ static void *vl_api_flowperpkt_tx_interface_add_del_t_print
   u8 *s;
 
   s = format (0, "SCRIPT: flowperpkt_tx_interface_add_del ");
-  s = format (s, "sw_if_index %d is_add %d is_ipv6 %d ",
+  s = format (s, "sw_if_index %d is_add %d which %d ",
 	      clib_host_to_net_u32 (mp->sw_if_index),
-	      (int) mp->is_add, (int) mp->is_ipv6);
+	      (int) mp->is_add, (int) mp->which);
   FINISH;
 }
 
@@ -365,6 +512,7 @@ flowperpkt_tx_interface_add_del_feature_command_fn (vlib_main_t * vm,
   flowperpkt_main_t *fm = &flowperpkt_main;
   u32 sw_if_index = ~0;
   int is_add = 1;
+  u8 which = FLOW_VARIANT_IPV4;
 
   int rv;
 
@@ -373,8 +521,9 @@ flowperpkt_tx_interface_add_del_feature_command_fn (vlib_main_t * vm,
       if (unformat (input, "disable"))
 	is_add = 0;
       else if (unformat (input, "%U", unformat_vnet_sw_interface,
-			 fm->vnet_main, &sw_if_index))
-	;
+			 fm->vnet_main, &sw_if_index));
+      else if (unformat (input, "l2"))
+	which = FLOW_VARIANT_L2;
       else
 	break;
     }
@@ -382,7 +531,8 @@ flowperpkt_tx_interface_add_del_feature_command_fn (vlib_main_t * vm,
   if (sw_if_index == ~0)
     return clib_error_return (0, "Please specify an interface...");
 
-  rv = flowperpkt_tx_interface_add_del_feature (fm, sw_if_index, is_add);
+  rv =
+    flowperpkt_tx_interface_add_del_feature (fm, sw_if_index, which, is_add);
   switch (rv)
     {
     case 0:
@@ -496,9 +646,12 @@ flowperpkt_init (vlib_main_t * vm)
   num_threads = 1 /* main thread */  + tm->n_eal_threads;
 
   /* Allocate per worker thread vectors */
-  vec_validate (fm->buffers_per_worker, num_threads - 1);
-  vec_validate (fm->frames_per_worker, num_threads - 1);
-  vec_validate (fm->next_record_offset_per_worker, num_threads - 1);
+  vec_validate (fm->ipv4_buffers_per_worker, num_threads - 1);
+  vec_validate (fm->l2_buffers_per_worker, num_threads - 1);
+  vec_validate (fm->ipv4_frames_per_worker, num_threads - 1);
+  vec_validate (fm->l2_frames_per_worker, num_threads - 1);
+  vec_validate (fm->ipv4_next_record_offset_per_worker, num_threads - 1);
+  vec_validate (fm->l2_next_record_offset_per_worker, num_threads - 1);
 
   /* Set up time reference pair */
   fm->vlib_time_0 = vlib_time_now (vm);
diff --git a/plugins/flowperpkt-plugin/flowperpkt/flowperpkt.h b/plugins/flowperpkt-plugin/flowperpkt/flowperpkt.h
index 31e685eb68d..20f6939dda5 100644
--- a/plugins/flowperpkt-plugin/flowperpkt/flowperpkt.h
+++ b/plugins/flowperpkt-plugin/flowperpkt/flowperpkt.h
@@ -35,15 +35,25 @@ typedef struct
   /** API message ID base */
   u16 msg_id_base;
 
-  /** Has the report been created? */
-  int report_created;
+  /** Have the reports [templates] been created? */
+  int ipv4_report_created;
+  int l2_report_created;
+
+  /** stream/template IDs */
+  u16 ipv4_report_id;
+  u16 l2_report_id;
 
   /** ipfix buffers under construction, per-worker thread */
-  vlib_buffer_t **buffers_per_worker;
+  vlib_buffer_t **ipv4_buffers_per_worker;
+  vlib_buffer_t **l2_buffers_per_worker;
+
   /** frames containing ipfix buffers, per-worker thread */
-  vlib_frame_t **frames_per_worker;
+  vlib_frame_t **ipv4_frames_per_worker;
+  vlib_frame_t **l2_frames_per_worker;
+
   /** next record offset, per worker thread */
-  u16 *next_record_offset_per_worker;
+  u16 *ipv4_next_record_offset_per_worker;
+  u16 *l2_next_record_offset_per_worker;
 
   /** Time reference pair */
   u64 nanosecond_time_0;
@@ -55,11 +65,19 @@ typedef struct
   vnet_main_t *vnet_main;
 } flowperpkt_main_t;
 
+typedef enum
+{
+  FLOW_VARIANT_IPV4,
+  FLOW_VARIANT_L2,
+  FLOW_N_VARIANTS,
+} flowperpkt_variant_t;
+
 extern flowperpkt_main_t flowperpkt_main;
 
-vlib_node_registration_t flowperpkt_node;
+extern vlib_node_registration_t flowperpkt_ipv4_node;
 
-void flowperpkt_flush_callback (void);
+void flowperpkt_flush_callback_ipv4 (void);
+void flowperpkt_flush_callback_l2 (void);
 
 #endif /* __included_flowperpkt_h__ */
 
diff --git a/plugins/flowperpkt-plugin/flowperpkt/flowperpkt_test.c b/plugins/flowperpkt-plugin/flowperpkt/flowperpkt_test.c
index 3c1cd227f57..716818ffe0a 100644
--- a/plugins/flowperpkt-plugin/flowperpkt/flowperpkt_test.c
+++ b/plugins/flowperpkt-plugin/flowperpkt/flowperpkt_test.c
@@ -132,6 +132,7 @@ api_flowperpkt_tx_interface_add_del (vat_main_t * vam)
   unformat_input_t *i = vam->input;
   f64 timeout;
   int enable_disable = 1;
+  u8 which = 0;			/* ipv4 by default */
   u32 sw_if_index = ~0;
   vl_api_flowperpkt_tx_interface_add_del_t *mp;
 
@@ -144,6 +145,8 @@ api_flowperpkt_tx_interface_add_del (vat_main_t * vam)
 	;
       else if (unformat (i, "disable"))
 	enable_disable = 0;
+      else if (unformat (i, "l2"))
+	which = 1;
       else
 	break;
     }
@@ -158,7 +161,7 @@ api_flowperpkt_tx_interface_add_del (vat_main_t * vam)
   M (FLOWPERPKT_TX_INTERFACE_ADD_DEL, flowperpkt_tx_interface_add_del);
   mp->sw_if_index = ntohl (sw_if_index);
   mp->is_add = enable_disable;
-  mp->is_ipv6 = 0;		/* $$$$ */
+  mp->which = which;
 
   /* send it... */
   S;
diff --git a/plugins/flowperpkt-plugin/flowperpkt/l2_node.c b/plugins/flowperpkt-plugin/flowperpkt/l2_node.c
new file mode 100644
index 00000000000..ba87d431b88
--- /dev/null
+++ b/plugins/flowperpkt-plugin/flowperpkt/l2_node.c
@@ -0,0 +1,544 @@
+/*
+ * l2_node.c - l2 ipfix-per-packet graph node
+ *
+ * Copyright (c) <current-year> <your-organization>
+ * 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 <flowperpkt/flowperpkt.h>
+
+/**
+ * @file l2 flow record generator graph node
+ */
+
+typedef struct
+{
+  /** interface handle */
+  u32 rx_sw_if_index;
+  u32 tx_sw_if_index;
+  /** src and dst L2 addresses */
+  u8 src_mac[6];
+  u8 dst_mac[6];
+  /** Ethertype */
+  u16 ethertype;
+  /** packet timestamp */
+  u64 timestamp;
+  /** size of the buffer */
+  u16 buffer_size;
+} flowperpkt_l2_trace_t;
+
+/* packet trace format function */
+static u8 *
+format_flowperpkt_l2_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 *);
+  flowperpkt_l2_trace_t *t = va_arg (*args, flowperpkt_l2_trace_t *);
+
+  s = format (s,
+	      "FLOWPERPKT-L2: rx_sw_if_index %d, tx_sw_if_index %d, src %U dst %U ethertype %0x2, timestamp %lld, size %d",
+	      t->rx_sw_if_index, t->tx_sw_if_index,
+	      format_ethernet_address, &t->src_mac,
+	      format_ethernet_address, &t->dst_mac,
+	      t->ethertype, t->timestamp, t->buffer_size);
+  return s;
+}
+
+vlib_node_registration_t flowperpkt_l2_node;
+
+/* No counters at the moment */
+#define foreach_flowperpkt_l2_error
+
+typedef enum
+{
+#define _(sym,str) FLOWPERPKT_ERROR_##sym,
+  foreach_flowperpkt_l2_error
+#undef _
+    FLOWPERPKT_N_ERROR,
+} flowperpkt_l2_error_t;
+
+static char *flowperpkt_l2_error_strings[] = {
+#define _(sym,string) string,
+  foreach_flowperpkt_l2_error
+#undef _
+};
+
+typedef enum
+{
+  FLOWPERPKT_L2_NEXT_DROP,
+  FLOWPERPKT_L2_N_NEXT,
+} flowperpkt_l2_next_t;
+
+/**
+ * @brief add an entry to the flow record under construction
+ * @param vm vlib_main_t * current worker thread main structure pointer
+ * @param fm flowperpkt_main_t * flow-per-packet main structure pointer
+ * @param sw_if_index u32 interface handle
+ * @param tos u8 ToS bits from the packet
+ * @param timestamp u64 timestamp, nanoseconds since 1/1/70
+ * @param length u16 ip length of the packet
+ * @param do_flush int 1 = flush all cached records, 0 = construct a record
+ */
+
+static inline void
+add_to_flow_record_l2 (vlib_main_t * vm,
+		       flowperpkt_main_t * fm,
+		       u32 rx_sw_if_index, u32 tx_sw_if_index,
+		       u8 * src_mac, u8 * dst_mac,
+		       u16 ethertype, u64 timestamp, u16 length, int do_flush)
+{
+  u32 my_cpu_number = vm->cpu_index;
+  flow_report_main_t *frm = &flow_report_main;
+  ip4_header_t *ip;
+  udp_header_t *udp;
+  ip4_ipfix_template_packet_t *tp;
+  ipfix_message_header_t *h;
+  ipfix_set_header_t *s;
+  vlib_frame_t *f;
+  vlib_buffer_t *b0;
+  u16 offset;
+  u32 bi0;
+  vlib_buffer_free_list_t *fl;
+
+  /* Find or allocate a buffer */
+  b0 = fm->l2_buffers_per_worker[my_cpu_number];
+
+  /* Need to allocate a buffer? */
+  if (PREDICT_FALSE (b0 == 0))
+    {
+      /* Nothing to flush */
+      if (do_flush)
+	return;
+
+      /* $$$$ drop counter? */
+      if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
+	return;
+
+      /* Initialize the buffer */
+      b0 = fm->l2_buffers_per_worker[my_cpu_number] =
+	vlib_get_buffer (vm, bi0);
+      fl =
+	vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
+      vlib_buffer_init_for_free_list (b0, fl);
+      VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
+      offset = 0;
+    }
+  else
+    {
+      /* use the current buffer */
+      bi0 = vlib_get_buffer_index (vm, b0);
+      offset = fm->l2_next_record_offset_per_worker[my_cpu_number];
+    }
+
+  /* Find or allocate a frame */
+  f = fm->l2_frames_per_worker[my_cpu_number];
+  if (PREDICT_FALSE (f == 0))
+    {
+      u32 *to_next;
+      f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
+      fm->l2_frames_per_worker[my_cpu_number] = f;
+
+      /* Enqueue the buffer */
+      to_next = vlib_frame_vector_args (f);
+      to_next[0] = bi0;
+      f->n_vectors = 1;
+    }
+
+  /* Fresh packet, construct header */
+  if (PREDICT_FALSE (offset == 0))
+    {
+      flow_report_stream_t *stream;
+
+      stream = &frm->streams[0];
+
+      b0->current_data = 0;
+      b0->current_length = sizeof (*ip) + sizeof (*udp) + sizeof (*h) +
+	sizeof (*s);
+      b0->flags |= (VLIB_BUFFER_TOTAL_LENGTH_VALID | VLIB_BUFFER_FLOW_REPORT);
+      vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
+      vnet_buffer (b0)->sw_if_index[VLIB_TX] = frm->fib_index;
+
+      tp = vlib_buffer_get_current (b0);
+      ip = (ip4_header_t *) & tp->ip4;
+      udp = (udp_header_t *) (ip + 1);
+      h = (ipfix_message_header_t *) (udp + 1);
+      s = (ipfix_set_header_t *) (h + 1);
+
+      ip->ip_version_and_header_length = 0x45;
+      ip->ttl = 254;
+      ip->protocol = IP_PROTOCOL_UDP;
+      ip->flags_and_fragment_offset = 0;
+      ip->src_address.as_u32 = frm->src_address.as_u32;
+      ip->dst_address.as_u32 = frm->ipfix_collector.as_u32;
+      udp->src_port = clib_host_to_net_u16 (UDP_DST_PORT_ipfix);
+      udp->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_ipfix);
+      udp->checksum = 0;
+
+      /* FIXUP: message header export_time */
+      h->export_time = (u32)
+	(((f64) frm->unix_time_0) +
+	 (vlib_time_now (frm->vlib_main) - frm->vlib_time_0));
+      h->export_time = clib_host_to_net_u32 (h->export_time);
+      h->domain_id = clib_host_to_net_u32 (stream->domain_id);
+
+      /* FIXUP: message header sequence_number */
+      h->sequence_number = stream->sequence_number++;
+      h->sequence_number = clib_host_to_net_u32 (h->sequence_number);
+
+      offset = (u32) (((u8 *) (s + 1)) - (u8 *) tp);
+    }
+
+  /* Add data, unless we're flushing stale data */
+  if (PREDICT_TRUE (do_flush == 0))
+    {
+
+      /* Add data */
+      /* Ingress interface */
+      {
+	u32 ingress_interface = clib_host_to_net_u32 (rx_sw_if_index);
+	clib_memcpy (b0->data + offset, &ingress_interface,
+		     sizeof (ingress_interface));
+	offset += sizeof (ingress_interface);
+      }
+      /* Egress interface */
+      {
+	u32 egress_interface = clib_host_to_net_u32 (tx_sw_if_index);
+	clib_memcpy (b0->data + offset, &egress_interface,
+		     sizeof (egress_interface));
+	offset += sizeof (egress_interface);
+      }
+      /* src mac address */
+      {
+	clib_memcpy (b0->data + offset, src_mac, 6);
+	offset += 6;
+      }
+      /* dst mac address */
+      {
+	clib_memcpy (b0->data + offset, dst_mac, 6);
+	offset += 6;
+      }
+
+      /* ethertype */
+      b0->data[offset++] = ethertype >> 8;
+      b0->data[offset++] = ethertype & 0xFF;
+
+      /* Timestamp */
+      clib_memcpy (b0->data + offset, &timestamp, sizeof (f64));
+      offset += sizeof (f64);
+
+      /* pkt size */
+      {
+	u16 pkt_size = clib_host_to_net_u16 (length);
+	clib_memcpy (b0->data + offset, &pkt_size, sizeof (pkt_size));
+	offset += sizeof (pkt_size);
+      }
+
+      b0->current_length +=
+	/* 2*sw_if_index + 2*mac + ethertype + timestamp + length = 32 */
+	2 * sizeof (u32) + 12 + sizeof (u16) + sizeof (f64) + sizeof (u16);
+
+    }
+  /* Time to flush the buffer? */
+  if (PREDICT_FALSE
+      (do_flush || (offset + 2 * sizeof (u32) + 12 + sizeof (u16) +
+		    +sizeof (f64) + sizeof (u16)) > frm->path_mtu))
+    {
+      tp = vlib_buffer_get_current (b0);
+      ip = (ip4_header_t *) & tp->ip4;
+      udp = (udp_header_t *) (ip + 1);
+      h = (ipfix_message_header_t *) (udp + 1);
+      s = (ipfix_set_header_t *) (h + 1);
+
+      s->set_id_length = ipfix_set_id_length (fm->l2_report_id,
+					      b0->current_length -
+					      (sizeof (*ip) + sizeof (*udp) +
+					       sizeof (*h)));
+      h->version_length = version_length (b0->current_length -
+					  (sizeof (*ip) + sizeof (*udp)));
+
+      ip->length = clib_host_to_net_u16 (b0->current_length);
+
+      ip->checksum = ip4_header_checksum (ip);
+      udp->length = clib_host_to_net_u16 (b0->current_length - sizeof (*ip));
+
+      if (frm->udp_checksum)
+	{
+	  /* RFC 7011 section 10.3.2. */
+	  udp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip);
+	  if (udp->checksum == 0)
+	    udp->checksum = 0xffff;
+	}
+
+      ASSERT (ip->checksum == ip4_header_checksum (ip));
+
+      vlib_put_frame_to_node (vm, ip4_lookup_node.index,
+			      fm->l2_frames_per_worker[my_cpu_number]);
+      fm->l2_frames_per_worker[my_cpu_number] = 0;
+      fm->l2_buffers_per_worker[my_cpu_number] = 0;
+      offset = 0;
+    }
+
+  fm->l2_next_record_offset_per_worker[my_cpu_number] = offset;
+}
+
+void
+flowperpkt_flush_callback_l2 (void)
+{
+  vlib_main_t *vm = vlib_get_main ();
+  flowperpkt_main_t *fm = &flowperpkt_main;
+
+  add_to_flow_record_l2 (vm, fm, 0 /* rx_sw_if_index */ ,
+			 0 /* tx_sw_if_index */ ,
+			 0 /* src mac */ ,
+			 0 /* dst mac */ ,
+			 0 /* ethertype */ ,
+			 0ULL /* timestamp */ ,
+			 0 /* length */ ,
+			 1 /* do_flush */ );
+}
+
+
+static uword
+flowperpkt_l2_node_fn (vlib_main_t * vm,
+		       vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  u32 n_left_from, *from, *to_next;
+  flowperpkt_l2_next_t next_index;
+  flowperpkt_main_t *fm = &flowperpkt_main;
+  u64 now;
+
+  now = (u64) ((vlib_time_now (vm) - fm->vlib_time_0) * 1e9);
+  now += fm->nanosecond_time_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 >= 4 && n_left_to_next >= 2)
+	{
+	  u32 next0 = FLOWPERPKT_L2_NEXT_DROP;
+	  u32 next1 = FLOWPERPKT_L2_NEXT_DROP;
+	  ethernet_header_t *eh0, *eh1;
+	  u16 len0, len1;
+	  u32 bi0, bi1;
+	  vlib_buffer_t *b0, *b1;
+
+	  /* Prefetch next iteration. */
+	  {
+	    vlib_buffer_t *p2, *p3;
+
+	    p2 = vlib_get_buffer (vm, from[2]);
+	    p3 = vlib_get_buffer (vm, from[3]);
+
+	    vlib_prefetch_buffer_header (p2, LOAD);
+	    vlib_prefetch_buffer_header (p3, LOAD);
+
+	    CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
+	    CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
+	  }
+
+	  /* speculatively enqueue b0 and b1 to the current next frame */
+	  to_next[0] = bi0 = from[0];
+	  to_next[1] = bi1 = from[1];
+	  from += 2;
+	  to_next += 2;
+	  n_left_from -= 2;
+	  n_left_to_next -= 2;
+
+	  b0 = vlib_get_buffer (vm, bi0);
+	  b1 = vlib_get_buffer (vm, bi1);
+
+	  vnet_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_TX],
+			     &next0, b0);
+	  vnet_feature_next (vnet_buffer (b1)->sw_if_index[VLIB_TX],
+			     &next1, b1);
+
+	  eh0 = vlib_buffer_get_current (b0);
+	  len0 = vlib_buffer_length_in_chain (vm, b0);
+
+	  if (PREDICT_TRUE ((b0->flags & VLIB_BUFFER_FLOW_REPORT) == 0))
+	    add_to_flow_record_l2 (vm, fm,
+				   vnet_buffer (b0)->sw_if_index[VLIB_RX],
+				   vnet_buffer (b0)->sw_if_index[VLIB_TX],
+				   eh0->src_address,
+				   eh0->dst_address,
+				   eh0->type, now, len0, 0 /* flush */ );
+
+	  eh1 = vlib_buffer_get_current (b0);
+	  len1 = vlib_buffer_length_in_chain (vm, b0);
+
+	  if (PREDICT_TRUE ((b1->flags & VLIB_BUFFER_FLOW_REPORT) == 0))
+	    add_to_flow_record_l2 (vm, fm,
+				   vnet_buffer (b1)->sw_if_index[VLIB_RX],
+				   vnet_buffer (b1)->sw_if_index[VLIB_TX],
+				   eh1->src_address,
+				   eh1->dst_address,
+				   eh1->type, now, len1, 0 /* flush */ );
+
+	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
+	    {
+	      if (b0->flags & VLIB_BUFFER_IS_TRACED)
+		{
+		  flowperpkt_l2_trace_t *t =
+		    vlib_add_trace (vm, node, b0, sizeof (*t));
+		  t->rx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+		  t->tx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+		  clib_memcpy (t->src_mac, eh0->src_address, 6);
+		  clib_memcpy (t->dst_mac, eh0->dst_address, 6);
+		  t->ethertype = clib_net_to_host_u16 (eh0->type);
+		  t->timestamp = now;
+		  t->buffer_size = len0;
+		}
+	      if (b1->flags & VLIB_BUFFER_IS_TRACED)
+		{
+		  flowperpkt_l2_trace_t *t =
+		    vlib_add_trace (vm, node, b1, sizeof (*t));
+		  t->rx_sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
+		  t->tx_sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
+		  clib_memcpy (t->src_mac, eh1->src_address, 6);
+		  clib_memcpy (t->dst_mac, eh1->dst_address, 6);
+		  t->ethertype = clib_net_to_host_u16 (eh1->type);
+		  t->timestamp = now;
+		  t->buffer_size = len1;
+		}
+	    }
+
+	  /* verify speculative enqueues, maybe switch current next frame */
+	  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)
+	{
+	  u32 bi0;
+	  vlib_buffer_t *b0;
+	  u32 next0 = FLOWPERPKT_L2_NEXT_DROP;
+	  ethernet_header_t *eh0;
+	  u16 len0;
+
+	  /* 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);
+
+	  vnet_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_TX],
+			     &next0, b0);
+
+	  eh0 = vlib_buffer_get_current (b0);
+	  len0 = vlib_buffer_length_in_chain (vm, b0);
+
+	  if (PREDICT_TRUE ((b0->flags & VLIB_BUFFER_FLOW_REPORT) == 0))
+	    add_to_flow_record_l2 (vm, fm,
+				   vnet_buffer (b0)->sw_if_index[VLIB_RX],
+				   vnet_buffer (b0)->sw_if_index[VLIB_TX],
+				   eh0->src_address,
+				   eh0->dst_address,
+				   eh0->type, now, len0, 0 /* flush */ );
+
+	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+			     && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+	    {
+	      flowperpkt_l2_trace_t *t =
+		vlib_add_trace (vm, node, b0, sizeof (*t));
+	      t->rx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+	      t->tx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+	      clib_memcpy (t->src_mac, eh0->src_address, 6);
+	      clib_memcpy (t->dst_mac, eh0->dst_address, 6);
+	      t->ethertype = clib_net_to_host_u16 (eh0->type);
+	      t->timestamp = now;
+	      t->buffer_size = len0;
+	    }
+
+	  /* 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);
+    }
+  return frame->n_vectors;
+}
+
+/**
+ * @brief IPFIX l2 flow-per-packet graph node
+ * @node flowperpkt-l2
+ *
+ * This is the IPFIX flow-record-per-packet node.
+ *
+ * @param vm    vlib_main_t corresponding to the current thread.
+ * @param node  vlib_node_runtime_t data for this node.
+ * @param frame vlib_frame_t whose contents should be dispatched.
+ *
+ * @par Graph mechanics: buffer metadata, next index usage
+ *
+ * <em>Uses:</em>
+ * - <code>vnet_buffer(b)->ip.save_rewrite_length</code>
+ *     - tells the node the length of the rewrite which was applied in
+ *       ip4/6_rewrite_inline, allows the code to find the IP header without
+ *       having to parse L2 headers, or make stupid assumptions about their
+ *       length.
+ * - <code>vnet_buffer(b)->flags & VLIB_BUFFER_FLOW_REPORT</code>
+ *     - Used to suppress flow record generation for flow record packets.
+ *
+ * <em>Sets:</em>
+ * - <code>vnet_buffer(b)->flags & VLIB_BUFFER_FLOW_REPORT</code>
+ *     - To suppress flow record generation for flow record packets
+ *
+ * <em>Next Index:</em>
+ * - Next configured output feature on the interface, usually
+ *   "interface-output." Generated flow records head for ip4-lookup
+ */
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (flowperpkt_l2_node) = {
+  .function = flowperpkt_l2_node_fn,
+  .name = "flowperpkt-l2",
+  .vector_size = sizeof (u32),
+  .format_trace = format_flowperpkt_l2_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = ARRAY_LEN(flowperpkt_l2_error_strings),
+  .error_strings = flowperpkt_l2_error_strings,
+
+  .n_next_nodes = FLOWPERPKT_L2_N_NEXT,
+
+  /* edit / add dispositions here */
+  .next_nodes = {
+    [FLOWPERPKT_L2_NEXT_DROP] = "error-drop",
+  },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/plugins/flowperpkt-plugin/flowperpkt/node.c b/plugins/flowperpkt-plugin/flowperpkt/node.c
index b1806fc4a82..460aa3be387 100644
--- a/plugins/flowperpkt-plugin/flowperpkt/node.c
+++ b/plugins/flowperpkt-plugin/flowperpkt/node.c
@@ -1,5 +1,5 @@
 /*
- * node.c - skeleton vpp engine plug-in dual-loop node skeleton
+ * node.c - ipv4 ipfix-per-packet graph node
  *
  * Copyright (c) <current-year> <your-organization>
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -21,7 +21,7 @@
 #include <flowperpkt/flowperpkt.h>
 
 /**
- * @file flow record generator graph node
+ * @file ipv4 flow record generator graph node
  */
 
 typedef struct
@@ -37,18 +37,18 @@ typedef struct
   u64 timestamp;
   /** size of the buffer */
   u16 buffer_size;
-} flowperpkt_trace_t;
+} flowperpkt_ipv4_trace_t;
 
 /* packet trace format function */
 static u8 *
-format_flowperpkt_trace (u8 * s, va_list * args)
+format_flowperpkt_ipv4_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 *);
-  flowperpkt_trace_t *t = va_arg (*args, flowperpkt_trace_t *);
+  flowperpkt_ipv4_trace_t *t = va_arg (*args, flowperpkt_ipv4_trace_t *);
 
   s = format (s,
-	      "FLOWPERPKT: rx_sw_if_index %d, tx_sw_if_index %d, src %U dst %U tos %0x2, timestamp %lld, size %d",
+	      "FLOWPERPKT-V4: rx_sw_if_index %d, tx_sw_if_index %d, src %U dst %U tos %0x2, timestamp %lld, size %d",
 	      t->rx_sw_if_index, t->tx_sw_if_index,
 	      format_ip4_address, &t->src_address,
 	      format_ip4_address, &t->dst_address,
@@ -56,30 +56,30 @@ format_flowperpkt_trace (u8 * s, va_list * args)
   return s;
 }
 
-vlib_node_registration_t flowperpkt_node;
+vlib_node_registration_t flowperpkt_ipv4_node;
 
-#define foreach_flowperpkt_error \
-_(SWAPPED, "Mac swap packets processed")
+/* No counters at the moment */
+#define foreach_flowperpkt_ipv4_error
 
 typedef enum
 {
 #define _(sym,str) FLOWPERPKT_ERROR_##sym,
-  foreach_flowperpkt_error
+  foreach_flowperpkt_ipv4_error
 #undef _
     FLOWPERPKT_N_ERROR,
-} flowperpkt_error_t;
+} flowperpkt_ipv4_error_t;
 
-static char *flowperpkt_error_strings[] = {
+static char *flowperpkt_ipv4_error_strings[] = {
 #define _(sym,string) string,
-  foreach_flowperpkt_error
+  foreach_flowperpkt_ipv4_error
 #undef _
 };
 
 typedef enum
 {
-  FLOWPERPKT_NEXT_DROP,
-  FLOWPERPKT_N_NEXT,
-} flowperpkt_next_t;
+  FLOWPERPKT_IPV4_NEXT_DROP,
+  FLOWPERPKT_IPV4_N_NEXT,
+} flowperpkt_ipv4_next_t;
 
 /**
  * @brief add an entry to the flow record under construction
@@ -93,11 +93,11 @@ typedef enum
  */
 
 static inline void
-add_to_flow_record (vlib_main_t * vm,
-		    flowperpkt_main_t * fm,
-		    u32 rx_sw_if_index, u32 tx_sw_if_index,
-		    u32 src_address, u32 dst_address,
-		    u8 tos, u64 timestamp, u16 length, int do_flush)
+add_to_flow_record_ipv4 (vlib_main_t * vm,
+			 flowperpkt_main_t * fm,
+			 u32 rx_sw_if_index, u32 tx_sw_if_index,
+			 u32 src_address, u32 dst_address,
+			 u8 tos, u64 timestamp, u16 length, int do_flush)
 {
   u32 my_cpu_number = vm->cpu_index;
   flow_report_main_t *frm = &flow_report_main;
@@ -113,7 +113,7 @@ add_to_flow_record (vlib_main_t * vm,
   vlib_buffer_free_list_t *fl;
 
   /* Find or allocate a buffer */
-  b0 = fm->buffers_per_worker[my_cpu_number];
+  b0 = fm->ipv4_buffers_per_worker[my_cpu_number];
 
   /* Need to allocate a buffer? */
   if (PREDICT_FALSE (b0 == 0))
@@ -127,7 +127,8 @@ add_to_flow_record (vlib_main_t * vm,
 	return;
 
       /* Initialize the buffer */
-      b0 = fm->buffers_per_worker[my_cpu_number] = vlib_get_buffer (vm, bi0);
+      b0 = fm->ipv4_buffers_per_worker[my_cpu_number] =
+	vlib_get_buffer (vm, bi0);
       fl =
 	vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
       vlib_buffer_init_for_free_list (b0, fl);
@@ -138,16 +139,16 @@ add_to_flow_record (vlib_main_t * vm,
     {
       /* use the current buffer */
       bi0 = vlib_get_buffer_index (vm, b0);
-      offset = fm->next_record_offset_per_worker[my_cpu_number];
+      offset = fm->ipv4_next_record_offset_per_worker[my_cpu_number];
     }
 
   /* Find or allocate a frame */
-  f = fm->frames_per_worker[my_cpu_number];
+  f = fm->ipv4_frames_per_worker[my_cpu_number];
   if (PREDICT_FALSE (f == 0))
     {
       u32 *to_next;
       f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
-      fm->frames_per_worker[my_cpu_number] = f;
+      fm->ipv4_frames_per_worker[my_cpu_number] = f;
 
       /* Enqueue the buffer */
       to_next = vlib_frame_vector_args (f);
@@ -250,8 +251,8 @@ add_to_flow_record (vlib_main_t * vm,
     }
   /* Time to flush the buffer? */
   if (PREDICT_FALSE
-      (do_flush || (offset + sizeof (u32) + sizeof (u8)
-		    + sizeof (f64)) > frm->path_mtu))
+      (do_flush || (offset + 4 * sizeof (u32) + sizeof (u8)
+		    + sizeof (f64) + sizeof (u16)) > frm->path_mtu))
     {
       tp = vlib_buffer_get_current (b0);
       ip = (ip4_header_t *) & tp->ip4;
@@ -259,7 +260,7 @@ add_to_flow_record (vlib_main_t * vm,
       h = (ipfix_message_header_t *) (udp + 1);
       s = (ipfix_set_header_t *) (h + 1);
 
-      s->set_id_length = ipfix_set_id_length (256,
+      s->set_id_length = ipfix_set_id_length (fm->ipv4_report_id,
 					      b0->current_length -
 					      (sizeof (*ip) + sizeof (*udp) +
 					       sizeof (*h)));
@@ -282,38 +283,38 @@ add_to_flow_record (vlib_main_t * vm,
       ASSERT (ip->checksum == ip4_header_checksum (ip));
 
       vlib_put_frame_to_node (vm, ip4_lookup_node.index,
-			      fm->frames_per_worker[my_cpu_number]);
-      fm->frames_per_worker[my_cpu_number] = 0;
-      fm->buffers_per_worker[my_cpu_number] = 0;
+			      fm->ipv4_frames_per_worker[my_cpu_number]);
+      fm->ipv4_frames_per_worker[my_cpu_number] = 0;
+      fm->ipv4_buffers_per_worker[my_cpu_number] = 0;
       offset = 0;
     }
 
-  fm->next_record_offset_per_worker[my_cpu_number] = offset;
+  fm->ipv4_next_record_offset_per_worker[my_cpu_number] = offset;
 }
 
 void
-flowperpkt_flush_callback (void)
+flowperpkt_flush_callback_ipv4 (void)
 {
   vlib_main_t *vm = vlib_get_main ();
   flowperpkt_main_t *fm = &flowperpkt_main;
 
-  add_to_flow_record (vm, fm, 0 /* rx_sw_if_index */ ,
-		      0 /* tx_sw_if_index */ ,
-		      0 /* src_address */ ,
-		      0 /* dst_address */ ,
-		      0 /* ToS */ ,
-		      0ULL /* timestamp */ ,
-		      0 /* length */ ,
-		      1 /* do_flush */ );
+  add_to_flow_record_ipv4 (vm, fm, 0 /* rx_sw_if_index */ ,
+			   0 /* tx_sw_if_index */ ,
+			   0 /* src_address */ ,
+			   0 /* dst_address */ ,
+			   0 /* ToS */ ,
+			   0ULL /* timestamp */ ,
+			   0 /* length */ ,
+			   1 /* do_flush */ );
 }
 
 
 static uword
-flowperpkt_node_fn (vlib_main_t * vm,
-		    vlib_node_runtime_t * node, vlib_frame_t * frame)
+flowperpkt_ipv4_node_fn (vlib_main_t * vm,
+			 vlib_node_runtime_t * node, vlib_frame_t * frame)
 {
   u32 n_left_from, *from, *to_next;
-  flowperpkt_next_t next_index;
+  flowperpkt_ipv4_next_t next_index;
   flowperpkt_main_t *fm = &flowperpkt_main;
   u64 now;
 
@@ -332,8 +333,8 @@ flowperpkt_node_fn (vlib_main_t * vm,
 
       while (n_left_from >= 4 && n_left_to_next >= 2)
 	{
-	  u32 next0 = FLOWPERPKT_NEXT_DROP;
-	  u32 next1 = FLOWPERPKT_NEXT_DROP;
+	  u32 next0 = FLOWPERPKT_IPV4_NEXT_DROP;
+	  u32 next1 = FLOWPERPKT_IPV4_NEXT_DROP;
 	  ip4_header_t *ip0, *ip1;
 	  u16 len0, len1;
 	  u32 bi0, bi1;
@@ -375,30 +376,30 @@ flowperpkt_node_fn (vlib_main_t * vm,
 	  len0 = vlib_buffer_length_in_chain (vm, b0);
 
 	  if (PREDICT_TRUE ((b0->flags & VLIB_BUFFER_FLOW_REPORT) == 0))
-	    add_to_flow_record (vm, fm,
-				vnet_buffer (b0)->sw_if_index[VLIB_RX],
-				vnet_buffer (b0)->sw_if_index[VLIB_TX],
-				ip0->src_address.as_u32,
-				ip0->dst_address.as_u32,
-				ip0->tos, now, len0, 0 /* flush */ );
+	    add_to_flow_record_ipv4 (vm, fm,
+				     vnet_buffer (b0)->sw_if_index[VLIB_RX],
+				     vnet_buffer (b0)->sw_if_index[VLIB_TX],
+				     ip0->src_address.as_u32,
+				     ip0->dst_address.as_u32,
+				     ip0->tos, now, len0, 0 /* flush */ );
 
 	  ip1 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b1) +
 				  vnet_buffer (b1)->ip.save_rewrite_length);
 	  len1 = vlib_buffer_length_in_chain (vm, b1);
 
 	  if (PREDICT_TRUE ((b1->flags & VLIB_BUFFER_FLOW_REPORT) == 0))
-	    add_to_flow_record (vm, fm,
-				vnet_buffer (b1)->sw_if_index[VLIB_RX],
-				vnet_buffer (b1)->sw_if_index[VLIB_TX],
-				ip1->src_address.as_u32,
-				ip1->dst_address.as_u32,
-				ip1->tos, now, len1, 0 /* flush */ );
+	    add_to_flow_record_ipv4 (vm, fm,
+				     vnet_buffer (b1)->sw_if_index[VLIB_RX],
+				     vnet_buffer (b1)->sw_if_index[VLIB_TX],
+				     ip1->src_address.as_u32,
+				     ip1->dst_address.as_u32,
+				     ip1->tos, now, len1, 0 /* flush */ );
 
 	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
 	    {
 	      if (b0->flags & VLIB_BUFFER_IS_TRACED)
 		{
-		  flowperpkt_trace_t *t =
+		  flowperpkt_ipv4_trace_t *t =
 		    vlib_add_trace (vm, node, b0, sizeof (*t));
 		  t->rx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
 		  t->tx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
@@ -410,7 +411,7 @@ flowperpkt_node_fn (vlib_main_t * vm,
 		}
 	      if (b1->flags & VLIB_BUFFER_IS_TRACED)
 		{
-		  flowperpkt_trace_t *t =
+		  flowperpkt_ipv4_trace_t *t =
 		    vlib_add_trace (vm, node, b1, sizeof (*t));
 		  t->rx_sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
 		  t->tx_sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
@@ -432,7 +433,7 @@ flowperpkt_node_fn (vlib_main_t * vm,
 	{
 	  u32 bi0;
 	  vlib_buffer_t *b0;
-	  u32 next0 = FLOWPERPKT_NEXT_DROP;
+	  u32 next0 = FLOWPERPKT_IPV4_NEXT_DROP;
 	  ip4_header_t *ip0;
 	  u16 len0;
 
@@ -461,17 +462,17 @@ flowperpkt_node_fn (vlib_main_t * vm,
 	  len0 = vlib_buffer_length_in_chain (vm, b0);
 
 	  if (PREDICT_TRUE ((b0->flags & VLIB_BUFFER_FLOW_REPORT) == 0))
-	    add_to_flow_record (vm, fm,
-				vnet_buffer (b0)->sw_if_index[VLIB_RX],
-				vnet_buffer (b0)->sw_if_index[VLIB_TX],
-				ip0->src_address.as_u32,
-				ip0->dst_address.as_u32,
-				ip0->tos, now, len0, 0 /* flush */ );
+	    add_to_flow_record_ipv4 (vm, fm,
+				     vnet_buffer (b0)->sw_if_index[VLIB_RX],
+				     vnet_buffer (b0)->sw_if_index[VLIB_TX],
+				     ip0->src_address.as_u32,
+				     ip0->dst_address.as_u32,
+				     ip0->tos, now, len0, 0 /* flush */ );
 
 	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
 			     && (b0->flags & VLIB_BUFFER_IS_TRACED)))
 	    {
-	      flowperpkt_trace_t *t =
+	      flowperpkt_ipv4_trace_t *t =
 		vlib_add_trace (vm, node, b0, sizeof (*t));
 	      t->rx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
 	      t->tx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
@@ -494,8 +495,8 @@ flowperpkt_node_fn (vlib_main_t * vm,
 }
 
 /**
- * @brief IPFIX flow-per-packet graph node
- * @node flowperpkt
+ * @brief IPFIX ipv4 flow-per-packet graph node
+ * @node flowperpkt-ipv4
  *
  * This is the IPFIX flow-record-per-packet node.
  *
@@ -524,21 +525,21 @@ flowperpkt_node_fn (vlib_main_t * vm,
  */
 
 /* *INDENT-OFF* */
-VLIB_REGISTER_NODE (flowperpkt_node) = {
-  .function = flowperpkt_node_fn,
-  .name = "flowperpkt",
+VLIB_REGISTER_NODE (flowperpkt_ipv4_node) = {
+  .function = flowperpkt_ipv4_node_fn,
+  .name = "flowperpkt-ipv4",
   .vector_size = sizeof (u32),
-  .format_trace = format_flowperpkt_trace,
+  .format_trace = format_flowperpkt_ipv4_trace,
   .type = VLIB_NODE_TYPE_INTERNAL,
 
-  .n_errors = ARRAY_LEN(flowperpkt_error_strings),
-  .error_strings = flowperpkt_error_strings,
+  .n_errors = ARRAY_LEN(flowperpkt_ipv4_error_strings),
+  .error_strings = flowperpkt_ipv4_error_strings,
 
-  .n_next_nodes = FLOWPERPKT_N_NEXT,
+  .n_next_nodes = FLOWPERPKT_IPV4_N_NEXT,
 
   /* edit / add dispositions here */
   .next_nodes = {
-    [FLOWPERPKT_NEXT_DROP] = "error-drop",
+    [FLOWPERPKT_IPV4_NEXT_DROP] = "error-drop",
   },
 };
 /* *INDENT-ON* */