VPP-470: Introduce VxLAN-GPE as transport for iOAM.

[vpp.git] / plugins / ioam-plugin / ioam / lib-vxlan-gpe / vxlan_gpe_ioam_trace.c

diff --git a/plugins/ioam-plugin/ioam/lib-vxlan-gpe/vxlan_gpe_ioam_trace.c b/plugins/ioam-plugin/ioam/lib-vxlan-gpe/vxlan_gpe_ioam_trace.c
index a10e85a..e37b164 100644 (file)
--- a/plugins/ioam-plugin/ioam/lib-vxlan-gpe/vxlan_gpe_ioam_trace.c
+++ b/plugins/ioam-plugin/ioam/lib-vxlan-gpe/vxlan_gpe_ioam_trace.c
@@ -288,7 +288,11 @@ vxlan_gpe_ioam_trace_data_list_handler (vlib_buffer_t * b,
          if (trace->ioam_trace_type & BIT_TTL_NODEID)
            {
              ip4_header_t *ip0 = vlib_buffer_get_current (b);
-             *elt = clib_host_to_net_u32 (((ip0->ttl - 1) << 24) |
+             /* The transit case is the only case where the TTL decrement happens
+              * before iOAM processing. For now, use the use_adj flag as an overload.
+              * We can probably use a separate flag instead of overloading the use_adj flag.
+              */
+             *elt = clib_host_to_net_u32 (((ip0->ttl - 1 + use_adj) << 24) |
                                           profile->node_id);
              elt++;
            }