commit f06aea5c7267cffabc1cc2438510a8fe7784079c
author Neale Ranns <nranns@cisco.com> Tue Nov 29 06:51:37 2016 -0800
committer Damjan Marion <dmarion.lists@gmail.com> Mon Dec 05 09:20:26 2016 +0000
tree b0ded9cd5d10d96b5c416dfc93935c5baca1d475
parent 072f8debf21c786ab785ed623229935e0a6cddb6

Locally generated packet go through lookup/load-balance - locally-generated is an attribute of the packet and checked where necessary

Add a flag to the vnet_buffer to indicate a packet is locally originated. Then in the rewrite nodes we can check this flag and not perform the TTL decrement. The switch path cost is expected to be fractions of a clock - the flags will be hot in the cache.
The cehcks are necessary to due the requirements that VPP must be able to emit an IP packet with TTL=255.

Change-Id: Ieb9cf06e34df54fd5c950293de8b665016295c51
Signed-off-by: Neale Ranns <nranns@cisco.com>

vnet/vnet/map/ip6_map.c

diff --git a/vnet/vnet/map/ip6_map.c b/vnet/vnet/map/ip6_map.c
index 2e38b0d..d294505 100644
--- a/vnet/vnet/map/ip6_map.c
+++ b/vnet/vnet/map/ip6_map.c
@@ -1195,7 +1195,7 @@
   .next_nodes = {
     [IP6_MAP_NEXT_IP4_LOOKUP] = "ip4-lookup",
 #ifdef MAP_SKIP_IP6_LOOKUP
-    [IP6_MAP_NEXT_IP4_REWRITE] = "ip4-rewrite-transit",
+    [IP6_MAP_NEXT_IP4_REWRITE] = "ip4-rewrite",
 #endif
     [IP6_MAP_NEXT_IP6_REASS] = "ip6-map-ip6-reass",
     [IP6_MAP_NEXT_IP4_REASS] = "ip6-map-ip4-reass",