Project import generated by Copybara.
PiperOrigin-RevId: 237361882
Change-Id: I109a68f44db867b20f8c6a7732b0ce657133e52a
diff --git a/quic/core/chlo_extractor.h b/quic/core/chlo_extractor.h
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+// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef QUICHE_QUIC_CORE_CHLO_EXTRACTOR_H_
+#define QUICHE_QUIC_CORE_CHLO_EXTRACTOR_H_
+
+#include "net/third_party/quiche/src/quic/core/crypto/crypto_handshake_message.h"
+#include "net/third_party/quiche/src/quic/core/quic_packets.h"
+
+namespace quic {
+
+// A utility for extracting QUIC Client Hello messages from packets,
+// without needs to spin up a full QuicSession.
+class ChloExtractor {
+ public:
+ class Delegate {
+ public:
+ virtual ~Delegate() {}
+
+ // Called when a CHLO message is found in the packets.
+ virtual void OnChlo(QuicTransportVersion version,
+ QuicConnectionId connection_id,
+ const CryptoHandshakeMessage& chlo) = 0;
+ };
+
+ // Extracts a CHLO message from |packet| and invokes the OnChlo
+ // method of |delegate|. Return true if a CHLO message was found,
+ // and false otherwise. If non-empty,
+ // |create_session_tag_indicators| contains a list of QUIC tags that
+ // if found will result in the session being created early, to
+ // enable support for multi-packet CHLOs.
+ static bool Extract(const QuicEncryptedPacket& packet,
+ const ParsedQuicVersionVector& versions,
+ const QuicTagVector& create_session_tag_indicators,
+ Delegate* delegate,
+ uint8_t connection_id_length);
+
+ ChloExtractor(const ChloExtractor&) = delete;
+ ChloExtractor operator=(const ChloExtractor&) = delete;
+};
+
+} // namespace quic
+
+#endif // QUICHE_QUIC_CORE_CHLO_EXTRACTOR_H_
