1 // Copyright (c) 2018 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef QUICHE_QUIC_CORE_FRAMES_QUIC_CRYPTO_FRAME_H_ 6 #define QUICHE_QUIC_CORE_FRAMES_QUIC_CRYPTO_FRAME_H_ 7 8 #include <memory> 9 #include <ostream> 10 11 #include "absl/strings/string_view.h" 12 #include "quiche/quic/core/quic_types.h" 13 #include "quiche/quic/platform/api/quic_export.h" 14 15 namespace quic { 16 17 struct QUICHE_EXPORT QuicCryptoFrame { 18 QuicCryptoFrame() = default; 19 QuicCryptoFrame(EncryptionLevel level, QuicStreamOffset offset, 20 QuicPacketLength data_length); 21 QuicCryptoFrame(EncryptionLevel level, QuicStreamOffset offset, 22 absl::string_view data); 23 ~QuicCryptoFrame(); 24 25 friend QUICHE_EXPORT std::ostream& operator<<(std::ostream& os, 26 const QuicCryptoFrame& s); 27 28 // TODO(haoyuewang) Consider replace the EncryptionLevel here with 29 // PacketNumberSpace. 30 // When writing a crypto frame to a packet, the packet must be encrypted at 31 // |level|. When a crypto frame is read, the encryption level of the packet it 32 // was received in is put in |level|. 33 EncryptionLevel level = ENCRYPTION_INITIAL; 34 QuicPacketLength data_length = 0; 35 // When reading, |data_buffer| points to the data that was received in the 36 // frame. |data_buffer| is not used when writing. 37 const char* data_buffer = nullptr; 38 QuicStreamOffset offset = 0; // Location of this data in the stream. 39 40 QuicCryptoFrame(EncryptionLevel level, QuicStreamOffset offset, 41 const char* data_buffer, QuicPacketLength data_length); 42 }; 43 static_assert(sizeof(QuicCryptoFrame) <= 64, 44 "Keep the QuicCryptoFrame size to a cacheline."); 45 46 } // namespace quic 47 48 #endif // QUICHE_QUIC_CORE_FRAMES_QUIC_CRYPTO_FRAME_H_ 49