1 // Copyright 2016 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_HTTP2_DECODER_PAYLOAD_DECODERS_SETTINGS_PAYLOAD_DECODER_H_ 6 #define QUICHE_HTTP2_DECODER_PAYLOAD_DECODERS_SETTINGS_PAYLOAD_DECODER_H_ 7 8 // Decodes the payload of a SETTINGS frame; for the RFC, see: 9 // http://httpwg.org/specs/rfc7540.html#SETTINGS 10 11 #include "quiche/http2/decoder/decode_buffer.h" 12 #include "quiche/http2/decoder/decode_status.h" 13 #include "quiche/http2/decoder/frame_decoder_state.h" 14 #include "quiche/http2/http2_structures.h" 15 #include "quiche/common/platform/api/quiche_export.h" 16 17 namespace http2 { 18 namespace test { 19 class SettingsPayloadDecoderPeer; 20 } // namespace test 21 22 class QUICHE_EXPORT SettingsPayloadDecoder { 23 public: 24 // Starts the decoding of a SETTINGS frame's payload, and completes it if 25 // the entire payload is in the provided decode buffer. 26 DecodeStatus StartDecodingPayload(FrameDecoderState* state, DecodeBuffer* db); 27 28 // Resumes decoding a SETTINGS frame that has been split across decode 29 // buffers. 30 DecodeStatus ResumeDecodingPayload(FrameDecoderState* state, 31 DecodeBuffer* db); 32 33 private: 34 friend class test::SettingsPayloadDecoderPeer; 35 36 // Decodes as many settings as are available in the decode buffer, starting at 37 // the first byte of one setting; if a single setting is split across buffers, 38 // ResumeDecodingPayload will handle starting from where the previous call 39 // left off, and then will call StartDecodingSettings. 40 DecodeStatus StartDecodingSettings(FrameDecoderState* state, 41 DecodeBuffer* db); 42 43 // Decoding a single SETTING returned a status other than kDecodeDone; this 44 // method just brings together the QUICHE_DCHECKs to reduce duplication. 45 DecodeStatus HandleNotDone(FrameDecoderState* state, DecodeBuffer* db, 46 DecodeStatus status); 47 48 Http2SettingFields setting_fields_; 49 }; 50 51 } // namespace http2 52 53 #endif // QUICHE_HTTP2_DECODER_PAYLOAD_DECODERS_SETTINGS_PAYLOAD_DECODER_H_ 54