| // Copyright 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. |
| |
| #include "quiche/http2/decoder/decode_http2_structures.h" |
| |
| #include <cstdint> |
| #include <cstring> |
| |
| #include "quiche/http2/decoder/decode_buffer.h" |
| #include "quiche/http2/http2_constants.h" |
| #include "quiche/common/platform/api/quiche_logging.h" |
| |
| namespace http2 { |
| |
| // Http2FrameHeader decoding: |
| |
| void DoDecode(Http2FrameHeader* out, DecodeBuffer* b) { |
| QUICHE_DCHECK_NE(nullptr, out); |
| QUICHE_DCHECK_NE(nullptr, b); |
| QUICHE_DCHECK_LE(Http2FrameHeader::EncodedSize(), b->Remaining()); |
| out->payload_length = b->DecodeUInt24(); |
| out->type = static_cast<Http2FrameType>(b->DecodeUInt8()); |
| out->flags = static_cast<Http2FrameFlag>(b->DecodeUInt8()); |
| out->stream_id = b->DecodeUInt31(); |
| } |
| |
| // Http2PriorityFields decoding: |
| |
| void DoDecode(Http2PriorityFields* out, DecodeBuffer* b) { |
| QUICHE_DCHECK_NE(nullptr, out); |
| QUICHE_DCHECK_NE(nullptr, b); |
| QUICHE_DCHECK_LE(Http2PriorityFields::EncodedSize(), b->Remaining()); |
| uint32_t stream_id_and_flag = b->DecodeUInt32(); |
| out->stream_dependency = stream_id_and_flag & StreamIdMask(); |
| if (out->stream_dependency == stream_id_and_flag) { |
| out->is_exclusive = false; |
| } else { |
| out->is_exclusive = true; |
| } |
| // Note that chars are automatically promoted to ints during arithmetic, |
| // so 255 + 1 doesn't end up as zero. |
| out->weight = b->DecodeUInt8() + 1; |
| } |
| |
| // Http2RstStreamFields decoding: |
| |
| void DoDecode(Http2RstStreamFields* out, DecodeBuffer* b) { |
| QUICHE_DCHECK_NE(nullptr, out); |
| QUICHE_DCHECK_NE(nullptr, b); |
| QUICHE_DCHECK_LE(Http2RstStreamFields::EncodedSize(), b->Remaining()); |
| out->error_code = static_cast<Http2ErrorCode>(b->DecodeUInt32()); |
| } |
| |
| // Http2SettingFields decoding: |
| |
| void DoDecode(Http2SettingFields* out, DecodeBuffer* b) { |
| QUICHE_DCHECK_NE(nullptr, out); |
| QUICHE_DCHECK_NE(nullptr, b); |
| QUICHE_DCHECK_LE(Http2SettingFields::EncodedSize(), b->Remaining()); |
| out->parameter = static_cast<Http2SettingsParameter>(b->DecodeUInt16()); |
| out->value = b->DecodeUInt32(); |
| } |
| |
| // Http2PushPromiseFields decoding: |
| |
| void DoDecode(Http2PushPromiseFields* out, DecodeBuffer* b) { |
| QUICHE_DCHECK_NE(nullptr, out); |
| QUICHE_DCHECK_NE(nullptr, b); |
| QUICHE_DCHECK_LE(Http2PushPromiseFields::EncodedSize(), b->Remaining()); |
| out->promised_stream_id = b->DecodeUInt31(); |
| } |
| |
| // Http2PingFields decoding: |
| |
| void DoDecode(Http2PingFields* out, DecodeBuffer* b) { |
| QUICHE_DCHECK_NE(nullptr, out); |
| QUICHE_DCHECK_NE(nullptr, b); |
| QUICHE_DCHECK_LE(Http2PingFields::EncodedSize(), b->Remaining()); |
| memcpy(out->opaque_bytes, b->cursor(), Http2PingFields::EncodedSize()); |
| b->AdvanceCursor(Http2PingFields::EncodedSize()); |
| } |
| |
| // Http2GoAwayFields decoding: |
| |
| void DoDecode(Http2GoAwayFields* out, DecodeBuffer* b) { |
| QUICHE_DCHECK_NE(nullptr, out); |
| QUICHE_DCHECK_NE(nullptr, b); |
| QUICHE_DCHECK_LE(Http2GoAwayFields::EncodedSize(), b->Remaining()); |
| out->last_stream_id = b->DecodeUInt31(); |
| out->error_code = static_cast<Http2ErrorCode>(b->DecodeUInt32()); |
| } |
| |
| // Http2WindowUpdateFields decoding: |
| |
| void DoDecode(Http2WindowUpdateFields* out, DecodeBuffer* b) { |
| QUICHE_DCHECK_NE(nullptr, out); |
| QUICHE_DCHECK_NE(nullptr, b); |
| QUICHE_DCHECK_LE(Http2WindowUpdateFields::EncodedSize(), b->Remaining()); |
| out->window_size_increment = b->DecodeUInt31(); |
| } |
| |
| // Http2PriorityUpdateFields decoding: |
| |
| void DoDecode(Http2PriorityUpdateFields* out, DecodeBuffer* b) { |
| QUICHE_DCHECK_NE(nullptr, out); |
| QUICHE_DCHECK_NE(nullptr, b); |
| QUICHE_DCHECK_LE(Http2PriorityUpdateFields::EncodedSize(), b->Remaining()); |
| out->prioritized_stream_id = b->DecodeUInt31(); |
| } |
| |
| // Http2AltSvcFields decoding: |
| |
| void DoDecode(Http2AltSvcFields* out, DecodeBuffer* b) { |
| QUICHE_DCHECK_NE(nullptr, out); |
| QUICHE_DCHECK_NE(nullptr, b); |
| QUICHE_DCHECK_LE(Http2AltSvcFields::EncodedSize(), b->Remaining()); |
| out->origin_length = b->DecodeUInt16(); |
| } |
| |
| } // namespace http2 |