Add caught time stamp for http tap filter (#28472)

Signed-off-by: fchen7 <cliff.chen@nokia-sbell.com>

Mirrored from https://github.com/envoyproxy/envoy @ 29c2a5c49f7ba81a738db018b21c032b578a5069

envoy/data/tap/v3/http.proto

@@ -5,6 +5,8 @@ package envoy.data.tap.v3;
 import "envoy/config/core/v3/base.proto";
 import "envoy/data/tap/v3/common.proto";
 
+import "google/protobuf/timestamp.proto";
+
 import "udpa/annotations/status.proto";
 import "udpa/annotations/versioning.proto";
 
@@ -34,6 +36,9 @@ message HttpBufferedTrace {
 
     // Message trailers.
     repeated config.core.v3.HeaderValue trailers = 3;
+
+    // The timestamp after receiving the message headers.
+    google.protobuf.Timestamp headers_received_time = 4;
   }
 
   // Request message.

envoy/extensions/filters/http/tap/v3/tap.proto

@@ -26,4 +26,9 @@ message Tap {
   // Common configuration for the HTTP tap filter.
   common.tap.v3.CommonExtensionConfig common_config = 1
       [(validate.rules).message = {required: true}];
+
+  // Indicates whether HTTP tap filter records the time stamp for request/response headers.
+  // Request headers time stamp is stored after receiving request headers.
+  // Response headers time stamp is stored after receiving response headers.
+  bool record_headers_received_time = 2;
 }