Raw export of IP6 packet with iOAM metadata

- is enabled on iOAM pop nodes with "set ioam export ipfix collector"
- ioam_export_node Hooks into vlib graph b/n ip6-hop-by-hop node and ip6-pop-hop-by-hop node
- A buffer per worker thread is created for collecting packet data to be exported
- ioam_export_node exports first 3 cachelines by collecting it in a MTU sized frame, slaps on ipfix header for export
- ioam_export_thread process node - checks for unsent record buffers for longer than 20 seconds and exports it
- Added dual loop and prefetch in add, hop-by-hop and pop functions

To be done:
- IPfix template
- Multi collector distribution of ipfix packets
- Port to be configurable

Change-Id: I959b4253036551382562bdaf10a83fd6f2f1c88b
Signed-off-by: Shwetha <shwethab@cisco.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/vnet/vnet/ip/ip6.h b/vnet/vnet/ip/ip6.h
index 0d5d8d04bf8..b43e2dac791 100644
--- a/vnet/vnet/ip/ip6.h
+++ b/vnet/vnet/ip/ip6.h
@@ -578,6 +578,7 @@ typedef struct {
   /* Array of function pointers to HBH option handling routines */
   int (*options[256])(vlib_buffer_t *b, ip6_header_t *ip, ip6_hop_by_hop_option_t *opt);
   u8 *(*trace[256])(u8 *s, ip6_hop_by_hop_option_t *opt);
+  uword next_override;
 } ip6_hop_by_hop_main_t;
 
 extern ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
@@ -586,6 +587,7 @@ int ip6_hbh_register_option (u8 option,
 			     int options(vlib_buffer_t *b, ip6_header_t *ip, ip6_hop_by_hop_option_t *opt),
 			     u8 *trace(u8 *s, ip6_hop_by_hop_option_t *opt));
 int ip6_hbh_unregister_option (u8 option);
+void ip6_hbh_set_next_override (uword next);
 
 /* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */
 #define OI_DECAP   100