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// Copyright (c) 2012 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/tools/quic/quic_epoll_connection_helper.h"
#include <errno.h>
#include <sys/socket.h>
#include "base/logging.h"
#include "base/stl_util.h"
#include "net/base/ip_endpoint.h"
#include "net/quic/crypto/quic_random.h"
#include "net/tools/flip_server/epoll_server.h"
#include "net/tools/quic/quic_socket_utils.h"
namespace net {
namespace tools {
namespace {
class QuicEpollAlarm : public QuicAlarm {
public:
QuicEpollAlarm(EpollServer* epoll_server,
QuicAlarm::Delegate* delegate)
: QuicAlarm(delegate),
epoll_server_(epoll_server),
epoll_alarm_impl_(this) {}
protected:
virtual void SetImpl() OVERRIDE {
DCHECK(deadline().IsInitialized());
epoll_server_->RegisterAlarm(
deadline().Subtract(QuicTime::Zero()).ToMicroseconds(),
&epoll_alarm_impl_);
}
virtual void CancelImpl() OVERRIDE {
DCHECK(!deadline().IsInitialized());
epoll_alarm_impl_.UnregisterIfRegistered();
}
private:
class EpollAlarmImpl : public EpollAlarm {
public:
explicit EpollAlarmImpl(QuicEpollAlarm* alarm) : alarm_(alarm) {}
virtual int64 OnAlarm() OVERRIDE {
EpollAlarm::OnAlarm();
alarm_->Fire();
// Fire will take care of registering the alarm, if needed.
return 0;
}
private:
QuicEpollAlarm* alarm_;
};
EpollServer* epoll_server_;
EpollAlarmImpl epoll_alarm_impl_;
};
} // namespace
QuicEpollConnectionHelper::QuicEpollConnectionHelper(
int fd, EpollServer* epoll_server)
: writer_(NULL),
epoll_server_(epoll_server),
fd_(fd),
connection_(NULL),
clock_(epoll_server),
random_generator_(QuicRandom::GetInstance()) {
}
QuicEpollConnectionHelper::QuicEpollConnectionHelper(QuicPacketWriter* writer,
EpollServer* epoll_server)
: writer_(writer),
epoll_server_(epoll_server),
fd_(-1),
connection_(NULL),
clock_(epoll_server),
random_generator_(QuicRandom::GetInstance()) {
}
QuicEpollConnectionHelper::~QuicEpollConnectionHelper() {
}
void QuicEpollConnectionHelper::SetConnection(QuicConnection* connection) {
DCHECK(!connection_);
connection_ = connection;
}
const QuicClock* QuicEpollConnectionHelper::GetClock() const {
return &clock_;
}
QuicRandom* QuicEpollConnectionHelper::GetRandomGenerator() {
return random_generator_;
}
int QuicEpollConnectionHelper::WritePacketToWire(
const QuicEncryptedPacket& packet,
int* error) {
if (connection_->ShouldSimulateLostPacket()) {
DLOG(INFO) << "Dropping packet due to fake packet loss.";
*error = 0;
return packet.length();
}
// If we have a writer, delgate the write to it.
if (writer_) {
return writer_->WritePacket(packet.data(), packet.length(),
connection_->self_address().address(),
connection_->peer_address(),
connection_,
error);
} else {
return QuicSocketUtils::WritePacket(
fd_, packet.data(), packet.length(),
connection_->self_address().address(),
connection_->peer_address(),
error);
}
}
bool QuicEpollConnectionHelper::IsWriteBlockedDataBuffered() {
return false;
}
bool QuicEpollConnectionHelper::IsWriteBlocked(int error) {
return error == EAGAIN || error == EWOULDBLOCK;
}
QuicAlarm* QuicEpollConnectionHelper::CreateAlarm(
QuicAlarm::Delegate* delegate) {
return new QuicEpollAlarm(epoll_server_, delegate);
}
} // namespace tools
} // namespace net
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