blob: 0f4c8cd668f5fdf378fd326b21ce01323796f9e5 [file] [log] [blame]
// Copyright (c) 2015 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/quic/quic_chromium_packet_reader.h"
#include "base/bind.h"
#include "base/location.h"
#include "base/metrics/histogram_macros.h"
#include "base/single_thread_task_runner.h"
#include "base/threading/thread_task_runner_handle.h"
#include "net/base/net_errors.h"
#include "net/third_party/quic/platform/api/quic_clock.h"
namespace net {
QuicChromiumPacketReader::QuicChromiumPacketReader(
DatagramClientSocket* socket,
quic::QuicClock* clock,
Visitor* visitor,
int yield_after_packets,
quic::QuicTime::Delta yield_after_duration,
const NetLogWithSource& net_log)
: socket_(socket),
visitor_(visitor),
read_pending_(false),
num_packets_read_(0),
clock_(clock),
yield_after_packets_(yield_after_packets),
yield_after_duration_(yield_after_duration),
yield_after_(quic::QuicTime::Infinite()),
read_buffer_(base::MakeRefCounted<IOBufferWithSize>(
static_cast<size_t>(quic::kMaxPacketSize))),
net_log_(net_log),
weak_factory_(this) {}
QuicChromiumPacketReader::~QuicChromiumPacketReader() {}
void QuicChromiumPacketReader::StartReading() {
for (;;) {
if (read_pending_)
return;
if (num_packets_read_ == 0)
yield_after_ = clock_->Now() + yield_after_duration_;
DCHECK(socket_);
read_pending_ = true;
int rv =
socket_->Read(read_buffer_.get(), read_buffer_->size(),
base::BindOnce(&QuicChromiumPacketReader::OnReadComplete,
weak_factory_.GetWeakPtr()));
UMA_HISTOGRAM_BOOLEAN("Net.QuicSession.AsyncRead", rv == ERR_IO_PENDING);
if (rv == ERR_IO_PENDING) {
num_packets_read_ = 0;
return;
}
if (++num_packets_read_ > yield_after_packets_ ||
clock_->Now() > yield_after_) {
num_packets_read_ = 0;
// Data was read, process it.
// Schedule the work through the message loop to 1) prevent infinite
// recursion and 2) avoid blocking the thread for too long.
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::BindOnce(&QuicChromiumPacketReader::OnReadComplete,
weak_factory_.GetWeakPtr(), rv));
} else {
if (!ProcessReadResult(rv)) {
return;
}
}
}
}
size_t QuicChromiumPacketReader::EstimateMemoryUsage() const {
// Return the size of |read_buffer_|.
return quic::kMaxPacketSize;
}
bool QuicChromiumPacketReader::ProcessReadResult(int result) {
read_pending_ = false;
if (result == 0)
result = ERR_CONNECTION_CLOSED;
if (result < 0) {
visitor_->OnReadError(result, socket_);
return false;
}
quic::QuicReceivedPacket packet(read_buffer_->data(), result, clock_->Now());
IPEndPoint local_address;
IPEndPoint peer_address;
socket_->GetLocalAddress(&local_address);
socket_->GetPeerAddress(&peer_address);
return visitor_->OnPacket(
packet,
quic::QuicSocketAddress(quic::QuicSocketAddressImpl(local_address)),
quic::QuicSocketAddress(quic::QuicSocketAddressImpl(peer_address)));
}
void QuicChromiumPacketReader::OnReadComplete(int result) {
if (ProcessReadResult(result)) {
StartReading();
}
}
} // namespace net