Project import generated by Copybara.
PiperOrigin-RevId: 237361882
Change-Id: I109a68f44db867b20f8c6a7732b0ce657133e52a
diff --git a/quic/core/crypto/transport_parameters.h b/quic/core/crypto/transport_parameters.h
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+// Copyright (c) 2018 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_CRYPTO_TRANSPORT_PARAMETERS_H_
+#define QUICHE_QUIC_CORE_CRYPTO_TRANSPORT_PARAMETERS_H_
+
+#include <memory>
+#include <vector>
+
+#include "net/third_party/quiche/src/quic/core/crypto/crypto_handshake_message.h"
+#include "net/third_party/quiche/src/quic/core/quic_types.h"
+#include "net/third_party/quiche/src/quic/core/quic_versions.h"
+
+namespace quic {
+
+// TransportParameters contains parameters for QUIC's transport layer that are
+// indicated during the TLS handshake. This struct is a mirror of the struct in
+// section 6.4 of draft-ietf-quic-transport-11.
+struct QUIC_EXPORT_PRIVATE TransportParameters {
+ TransportParameters();
+ ~TransportParameters();
+
+ // When |perspective| is Perspective::IS_CLIENT, this struct is being used in
+ // the client_hello handshake message; when it is Perspective::IS_SERVER, it
+ // is being used in the encrypted_extensions handshake message.
+ Perspective perspective;
+
+ // When Perspective::IS_CLIENT, |version| is the initial version offered by
+ // the client (before any version negotiation packets) for this connection.
+ // When Perspective::IS_SERVER, |version| is the version that is in use.
+ QuicVersionLabel version = 0;
+
+ // Server-only parameters:
+
+ // |supported_versions| contains a list of all versions that the server would
+ // send in a version negotiation packet. It is not used if |perspective ==
+ // Perspective::IS_CLIENT|.
+ QuicVersionLabelVector supported_versions;
+
+ // See section 6.4.1 of draft-ietf-quic-transport-11 for definition.
+ std::vector<uint8_t> stateless_reset_token;
+
+ // Required parameters. See section 6.4.1 of draft-ietf-quic-transport-11 for
+ // definitions.
+ uint32_t initial_max_stream_data = 0;
+ uint32_t initial_max_data = 0;
+ uint16_t idle_timeout = 0;
+
+ template <typename T>
+ struct OptionalParam {
+ bool present = false;
+ T value;
+ };
+
+ // Optional parameters. See section 6.4.1 of draft-ietf-quic-transport-11 for
+ // definitions.
+ OptionalParam<uint16_t> initial_max_bidi_streams;
+ OptionalParam<uint16_t> initial_max_uni_streams;
+ OptionalParam<uint16_t> max_packet_size;
+ OptionalParam<uint8_t> ack_delay_exponent;
+
+ // Transport parameters used by Google QUIC but not IETF QUIC. This is
+ // serialized into a TransportParameter struct with a TransportParameterId of
+ // 18257.
+ std::unique_ptr<CryptoHandshakeMessage> google_quic_params;
+
+ // Returns true if the contents of this struct are valid.
+ bool is_valid() const;
+};
+
+// Serializes a TransportParameters struct into the format for sending it in a
+// TLS extension. The serialized bytes are put in |*out|, and this function
+// returns true on success or false if |TransportParameters::is_valid| returns
+// false.
+QUIC_EXPORT_PRIVATE bool SerializeTransportParameters(
+ const TransportParameters& in,
+ std::vector<uint8_t>* out);
+
+// Parses bytes from the quic_transport_parameters TLS extension and writes the
+// parsed parameters into |*out|. Input is read from |in| for |in_len| bytes.
+// |perspective| indicates whether the input came from a client or a server.
+// This method returns true if the input was successfully parsed, and false if
+// it could not be parsed.
+// TODO(nharper): Write fuzz tests for this method.
+QUIC_EXPORT_PRIVATE bool ParseTransportParameters(const uint8_t* in,
+ size_t in_len,
+ Perspective perspective,
+ TransportParameters* out);
+
+} // namespace quic
+
+#endif // QUICHE_QUIC_CORE_CRYPTO_TRANSPORT_PARAMETERS_H_
