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// Copyright 2013 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_default_packet_writer.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/metrics/histogram_macros.h"
#include "base/metrics/sparse_histogram.h"
#include "net/base/io_buffer.h"
#include "net/base/net_errors.h"
namespace net {
QuicDefaultPacketWriter::QuicDefaultPacketWriter() : weak_factory_(this) {
}
QuicDefaultPacketWriter::QuicDefaultPacketWriter(Socket* socket)
: socket_(socket), write_blocked_(false), weak_factory_(this) {}
QuicDefaultPacketWriter::~QuicDefaultPacketWriter() {}
WriteResult QuicDefaultPacketWriter::WritePacket(
const char* buffer,
size_t buf_len,
const IPAddressNumber& self_address,
const IPEndPoint& peer_address) {
scoped_refptr<StringIOBuffer> buf(
new StringIOBuffer(std::string(buffer, buf_len)));
DCHECK(!IsWriteBlocked());
base::TimeTicks now = base::TimeTicks::Now();
int rv = socket_->Write(buf.get(),
buf_len,
base::Bind(&QuicDefaultPacketWriter::OnWriteComplete,
weak_factory_.GetWeakPtr()));
WriteStatus status = WRITE_STATUS_OK;
if (rv < 0) {
if (rv != ERR_IO_PENDING) {
UMA_HISTOGRAM_SPARSE_SLOWLY("Net.QuicSession.WriteError", -rv);
status = WRITE_STATUS_ERROR;
} else {
status = WRITE_STATUS_BLOCKED;
write_blocked_ = true;
}
}
base::TimeDelta delta = base::TimeTicks::Now() - now;
if (status == WRITE_STATUS_OK) {
UMA_HISTOGRAM_TIMES("Net.QuicSession.PacketWriteTime.Synchronous", delta);
} else if (status == WRITE_STATUS_BLOCKED) {
UMA_HISTOGRAM_TIMES("Net.QuicSession.PacketWriteTime.Asynchronous", delta);
}
return WriteResult(status, rv);
}
bool QuicDefaultPacketWriter::IsWriteBlockedDataBuffered() const {
// Chrome sockets' Write() methods buffer the data until the Write is
// permitted.
return true;
}
bool QuicDefaultPacketWriter::IsWriteBlocked() const {
return write_blocked_;
}
void QuicDefaultPacketWriter::SetWritable() {
write_blocked_ = false;
}
void QuicDefaultPacketWriter::OnWriteComplete(int rv) {
DCHECK_NE(rv, ERR_IO_PENDING);
write_blocked_ = false;
if (rv < 0) {
connection_->OnWriteError(rv);
}
connection_->OnCanWrite();
}
QuicByteCount QuicDefaultPacketWriter::GetMaxPacketSize(
const IPEndPoint& peer_address) const {
return kMaxPacketSize;
}
} // namespace net
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