From: Aloys Augustin <aloaugus@cisco.com>
Date: Tue, 13 Apr 2021 19:14:55 +0000 (+0200)
Subject: ip: ensure ttl doesn't decrease to 0 when punting
X-Git-Tag: v21.10-rc0~86
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=7b2917fbe2a9ec17f69ca94fcbae534927915834;p=vpp.git

ip: ensure ttl doesn't decrease to 0 when punting

Change-Id: I248ef12fd34ea2a1c383fbcc530a8ffeb31ba92b
Type: fix
Signed-off-by: Aloys Augustin <aloaugus@cisco.com>
---

diff --git a/src/vnet/ip/ip_punt_drop.h b/src/vnet/ip/ip_punt_drop.h
index 16d46ba190e..a595e446adc 100644
--- a/src/vnet/ip/ip_punt_drop.h
+++ b/src/vnet/ip/ip_punt_drop.h
@@ -349,6 +349,8 @@ ip_punt_redirect (vlib_main_t * vm,
 
 	  if (PREDICT_TRUE (INDEX_INVALID != rrxi0))
 	    {
+	      /* prevent ttl decrement on forward */
+	      b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
 	      rrx0 = ip_punt_redirect_get (rrxi0);
 	      vnet_buffer (b0)->ip.adj_index[VLIB_TX] = rrx0->dpo.dpoi_index;
 	      next0 = rrx0->dpo.dpoi_next_node;