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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/filter/fuzzed_source_stream.h"
- #include <fuzzer/FuzzedDataProvider.h>
- #include <algorithm>
- #include <string>
- #include <utility>
- #include "base/bind.h"
- #include "base/threading/thread_task_runner_handle.h"
- #include "net/base/io_buffer.h"
- #include "net/base/net_errors.h"
- namespace net {
- namespace {
- // Common net error codes that can be returned by a SourceStream.
- const Error kReadErrors[] = {OK, ERR_FAILED, ERR_CONTENT_DECODING_FAILED};
- } // namespace
- FuzzedSourceStream::FuzzedSourceStream(FuzzedDataProvider* data_provider)
- : SourceStream(SourceStream::TYPE_NONE), data_provider_(data_provider) {}
- FuzzedSourceStream::~FuzzedSourceStream() {
- DCHECK(!read_pending_);
- }
- int FuzzedSourceStream::Read(IOBuffer* buf,
- int buf_len,
- CompletionOnceCallback callback) {
- DCHECK(!read_pending_);
- DCHECK(!end_returned_);
- DCHECK_LE(0, buf_len);
- bool sync = data_provider_->ConsumeBool();
- int result = data_provider_->ConsumeIntegralInRange(0, buf_len);
- std::string data = data_provider_->ConsumeBytesAsString(result);
- result = data.size();
- if (result <= 0)
- result = data_provider_->PickValueInArray(kReadErrors);
- if (sync) {
- if (result > 0) {
- std::copy(data.data(), data.data() + data.size(), buf->data());
- } else {
- end_returned_ = true;
- }
- return result;
- }
- scoped_refptr<IOBuffer> pending_read_buf = buf;
- read_pending_ = true;
- // |this| is owned by the caller so use base::Unretained is safe.
- base::ThreadTaskRunnerHandle::Get()->PostTask(
- FROM_HERE, base::BindOnce(&FuzzedSourceStream::OnReadComplete,
- base::Unretained(this), std::move(callback),
- data, pending_read_buf, result));
- return ERR_IO_PENDING;
- }
- std::string FuzzedSourceStream::Description() const {
- return "";
- }
- bool FuzzedSourceStream::MayHaveMoreBytes() const {
- return !end_returned_;
- }
- void FuzzedSourceStream::OnReadComplete(CompletionOnceCallback callback,
- const std::string& fuzzed_data,
- scoped_refptr<IOBuffer> read_buf,
- int result) {
- DCHECK(read_pending_);
- if (result > 0) {
- std::copy(fuzzed_data.data(), fuzzed_data.data() + result,
- read_buf->data());
- } else {
- end_returned_ = true;
- }
- read_pending_ = false;
- std::move(callback).Run(result);
- }
- } // namespace net
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