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Import chromium-63.0.3239.132

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klzgrad
2018-01-29 00:30:36 +08:00
commit 19bc836227
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109
net/http2/decoder/decode_http2_structures.cc Normal file
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// 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 "net/http2/decoder/decode_http2_structures.h"
#include "base/logging.h"
#include "net/http2/decoder/decode_buffer.h"
#include "net/http2/http2_constants.h"
namespace net {
// Http2FrameHeader decoding:
void DoDecode(Http2FrameHeader* out, DecodeBuffer* b) {
DCHECK_NE(nullptr, out);
DCHECK_NE(nullptr, b);
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) {
DCHECK_NE(nullptr, out);
DCHECK_NE(nullptr, b);
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) {
DCHECK_NE(nullptr, out);
DCHECK_NE(nullptr, b);
DCHECK_LE(Http2RstStreamFields::EncodedSize(), b->Remaining());
out->error_code = static_cast<Http2ErrorCode>(b->DecodeUInt32());
}
// Http2SettingFields decoding:
void DoDecode(Http2SettingFields* out, DecodeBuffer* b) {
DCHECK_NE(nullptr, out);
DCHECK_NE(nullptr, b);
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) {
DCHECK_NE(nullptr, out);
DCHECK_NE(nullptr, b);
DCHECK_LE(Http2PushPromiseFields::EncodedSize(), b->Remaining());
out->promised_stream_id = b->DecodeUInt31();
}
// Http2PingFields decoding:
void DoDecode(Http2PingFields* out, DecodeBuffer* b) {
DCHECK_NE(nullptr, out);
DCHECK_NE(nullptr, b);
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) {
DCHECK_NE(nullptr, out);
DCHECK_NE(nullptr, b);
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) {
DCHECK_NE(nullptr, out);
DCHECK_NE(nullptr, b);
DCHECK_LE(Http2WindowUpdateFields::EncodedSize(), b->Remaining());
out->window_size_increment = b->DecodeUInt31();
}
// Http2AltSvcFields decoding:
void DoDecode(Http2AltSvcFields* out, DecodeBuffer* b) {
DCHECK_NE(nullptr, out);
DCHECK_NE(nullptr, b);
DCHECK_LE(Http2AltSvcFields::EncodedSize(), b->Remaining());
out->origin_length = b->DecodeUInt16();
}
} // namespace net