BFD: add ARP-awareness, fix bugs

Make BFD ARP-aware when sending out packets.
Fix a few one-liner bugs discovered while integrating with cisco
nexus. Enhance CLI view to better observe session state.

Change-Id: I266c29492f351207b84328ab665d9d697969da9c
Signed-off-by: Klement Sekera <ksekera@cisco.com>

1 files changed, 23 insertions, 2 deletions

diff --git a/src/vnet/bfd/bfd_udp.h b/src/vnet/bfd/bfd_udp.h
index 5080ec98f75..a4adbadf861 100644
--- a/src/vnet/bfd/bfd_udp.h
+++ b/src/vnet/bfd/bfd_udp.h
@@ -57,11 +57,12 @@ struct bfd_session_s;
 /**
  * @brief add the necessary transport layer by prepending it to existing data
  *
+ *
  * @param is_echo 1 if this is echo packet, 0 if control frame
  *
  * @return 1 on success, 0 on failure
  */
-int bfd_add_udp4_transport (vlib_main_t * vm, vlib_buffer_t * b,
+int bfd_add_udp4_transport (vlib_main_t * vm, u32 bi,
 			    const struct bfd_session_s *bs, int is_echo);
 
 /**
@@ -71,10 +72,30 @@ int bfd_add_udp4_transport (vlib_main_t * vm, vlib_buffer_t * b,
  *
  * @return 1 on success, 0 on failure
  */
-int bfd_add_udp6_transport (vlib_main_t * vm, vlib_buffer_t * b,
+int bfd_add_udp6_transport (vlib_main_t * vm, u32 bi,
 			    const struct bfd_session_s *bs, int is_echo);
 
 /**
+ * @brief transport packet over udpv4
+ *
+ * @param is_echo 1 if this is echo packet, 0 if control frame
+ *
+ * @return 1 on success, 0 on failure
+ */
+int bfd_transport_udp4 (vlib_main_t * vm, u32 bi,
+			const struct bfd_session_s *bs);
+
+/**
+ * @brief transport packet over udpv6
+ *
+ * @param is_echo 1 if this is echo packet, 0 if control frame
+ *
+ * @return 1 on success, 0 on failure
+ */
+int bfd_transport_udp6 (vlib_main_t * vm, u32 bi,
+			const struct bfd_session_s *bs);
+
+/**
  * @brief check if the bfd udp layer is echo-capable at this time
  *
  * @return 1 if available, 0 otherwise