+ optional int64 bytes_sent = 10;
+ optional int64 bytes_lost = 11;
+ optional int64 num_loss_events = 12;
+ optional bytes referer = 15;
+ optional bytes user_agent = 16;
+ optional bytes tls_context = 17; // If not present, then not using TLS for this client.
+ optional int64 tls_output_bytes_already_consumed = 18;
+ optional bool in_ktls_mode = 19;