flowprobe: add support for reporting on inbound packets

Type: feature

Currently, the plugin supports only IPFIX flow record generation for
outbound packets.

With this change:
 - add a new API message for enabling the feature on an interface that
   accepts direction (rx, tx, both);
 - update existing debug command for feature enabling to accept
   direction;
 - update existing debug command for showing currently enabled feature
   on interfaces to display direction;
 - update templates to include a direction field;
 - generate flow records on the specified direction and data path;
 - report direction in flow data;
 - update tests to use the new API;
 - add tests for inbound flows.

Change-Id: I121fd904b38408641036ebeea848df7a4e5e0b30
Signed-off-by: Alexander Chernavin <achernavin@netgate.com>

1 files changed, 10 insertions, 1 deletions

diff --git a/src/plugins/flowprobe/flowprobe.h b/src/plugins/flowprobe/flowprobe.h
index 2d28c81de33..3174a844c2a 100644
--- a/src/plugins/flowprobe/flowprobe.h
+++ b/src/plugins/flowprobe/flowprobe.h
@@ -45,13 +45,20 @@ typedef enum
 /* *INDENT-OFF* */
 typedef enum __attribute__ ((__packed__))
 {
-  FLOW_VARIANT_IP4,
+  FLOW_VARIANT_IP4 = 0,
   FLOW_VARIANT_IP6,
   FLOW_VARIANT_L2,
   FLOW_VARIANT_L2_IP4,
   FLOW_VARIANT_L2_IP6,
   FLOW_N_VARIANTS,
 } flowprobe_variant_t;
+
+typedef enum __attribute__ ((__packed__))
+{
+  FLOW_DIRECTION_RX = 0,
+  FLOW_DIRECTION_TX,
+  FLOW_DIRECTION_BOTH,
+} flowprobe_direction_t;
 /* *INDENT-ON* */
 
 STATIC_ASSERT (sizeof (flowprobe_variant_t) == 1,
@@ -85,6 +92,7 @@ typedef struct __attribute__ ((aligned (8))) {
   u16 src_port;
   u16 dst_port;
   flowprobe_variant_t which;
+  flowprobe_direction_t direction;
 } flowprobe_key_t;
 /* *INDENT-ON* */
 
@@ -149,6 +157,7 @@ typedef struct
 
   u16 template_per_flow[FLOW_N_VARIANTS];
   u8 *flow_per_interface;
+  u8 *direction_per_interface;
 
   /** convenience vlib_main_t pointer */
   vlib_main_t *vlib_main;