From 803e444bf33dcd044b11eb119353e613d63f6b09 Mon Sep 17 00:00:00 2001
From: "data-plane-api(CircleCI)" <data-plane-api@users.noreply.github.com>
Date: Mon, 12 Aug 2019 19:04:56 +0000
Subject: [PATCH] tracing: Add B3 support in OpenCensus driver. (#7800)

Signed-off-by: Emil Mikulic <g-easy@users.noreply.github.com>

Mirrored from https://github.com/envoyproxy/envoy @ c3a75316f2fa495fc7be36efd4f291445ac7b857
---
 envoy/config/trace/v2/trace.proto | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/envoy/config/trace/v2/trace.proto b/envoy/config/trace/v2/trace.proto
index 34f11ec7..e4e4dec6 100644
--- a/envoy/config/trace/v2/trace.proto
+++ b/envoy/config/trace/v2/trace.proto
@@ -150,6 +150,9 @@ message OpenCensusConfig {
 
     // "X-Cloud-Trace-Context:" header.
     CLOUD_TRACE_CONTEXT = 3;
+
+    // X-B3-* headers.
+    B3 = 4;
   }
 
   // List of incoming trace context headers we will accept. First one found