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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <Eris/BaseConnection.h>
#include <Eris/Exceptions.h>
#include <Eris/Timeout.h>
#include <Eris/Poll.h>
#include <Eris/Log.h>
#include <Eris/DeleteLater.h>
#include <Eris/Operations.h>
#include <Atlas/Codec.h>
#include <Atlas/Net/Stream.h>
#include <Atlas/Objects/Encoder.h>
#include <Atlas/Objects/objectFactory.h>
#include <skstream/skstream.h>
#include <sigc++/slot.h>
#include <sstream>
#include <cassert>
namespace Eris {
////////////////////////////////////////////////////////////////////////////////////////////////////////
BaseConnection::BaseConnection(const std::string &cnm,
const std::string &id,
Atlas::Bridge *br) :
_sc(NULL),
_status(DISCONNECTED),
_id(id),
_stream(NULL),
_clientName(cnm),
_bridge(br),
_timeout(NULL),
_host(""),
_port(0)
{
assert(_bridge);
Atlas::Objects::Factories* f = Atlas::Objects::Factories::instance();
if (!f->hasFactory("unseen"))
{
Atlas::Objects::Operation::UNSEEN_NO = f->addFactory("unseen", &Atlas::Objects::generic_factory);
Atlas::Objects::Operation::ATTACK_NO = f->addFactory("attack", &Atlas::Objects::generic_factory);
}
}
BaseConnection::~BaseConnection()
{
if (_status != DISCONNECTED)
{
hardDisconnect(true);
}
}
int BaseConnection::connect(const std::string &host, short port)
{
if (_stream != NULL) {
warning() << "in base connection :: connect, had existing stream, discarding it";
hardDisconnect(true);
}
_host = host;
_port = port;
// start timeout
_timeout = new Timeout(20 * 1000);
_timeout->Expired.connect(sigc::mem_fun(this, &BaseConnection::onConnectTimeout));
setStatus(CONNECTING);
_stream = new tcp_socket_stream(host, port, true);
Poll::instance().addStream(_stream, Poll::WRITE);
return 0;
}
void BaseConnection::hardDisconnect(bool emit)
{
if (_status == DISCONNECTED) return;
assert(_stream);
// okay, tear it down
if ((_status == CONNECTED) || (_status == DISCONNECTING)){
delete m_codec;
delete _encode;
} else if (_status == NEGOTIATE) {
delete _sc;
_sc = NULL;
} else if (_status == CONNECTING) {
// nothing to be done, but can happen
} else
throw InvalidOperation("Bad connection state for disconnection");
deleteLater(_timeout);
_timeout = NULL;
Poll::instance().removeStream(_stream);
delete _stream;
_stream = NULL;
setStatus(DISCONNECTED);
if (emit) Disconnected.emit();
}
void BaseConnection::recv()
{
int err = 0;
assert(_status != DISCONNECTED);
assert(_stream);
if (_stream->eof() || _stream->fail()) {
handleFailure("Connection stream failed");
hardDisconnect(false);
} else {
switch (_status) {
case CONNECTING:
nonblockingConnect();
break;
case NEGOTIATE:
pollNegotiation();
break;
case CONNECTED:
case DISCONNECTING:
m_codec->poll();
break;
default:
throw InvalidOperation("Unexpected connection status in poll()");
}
}
// another paranoid check
if (_stream && (err = _stream->getLastError()) != 0) {
char msgBuf[128];
::snprintf(msgBuf, 128, "recv() got stream failure, error %d", _stream->getLastError());
handleFailure(msgBuf);
hardDisconnect(false);
}
}
void BaseConnection::nonblockingConnect()
{
assert(_stream);
if (!_stream->isReady())
return;
if(!_stream->is_open()) {
handleFailure("Failed to connect to " + _host);
hardDisconnect(false);
return;
}
Poll::instance().changeStream(_stream, Poll::READ);
// negotiation timeout
delete _timeout;
_timeout = new Timeout(5000);
_timeout->Expired.connect(sigc::mem_fun(this, &BaseConnection::onNegotiateTimeout));
_sc = new Atlas::Net::StreamConnect(_clientName, *_stream);
setStatus(NEGOTIATE);
}
void BaseConnection::pollNegotiation()
{
if (!_sc || (_status != NEGOTIATE))
{
throw InvalidOperation("pollNegotiation: unexpected connection status");
}
_sc->poll();
if (_sc->getState() == Atlas::Net::StreamConnect::IN_PROGRESS)
// more negotiation to do once more netwrok data arrives
return;
if (_sc->getState() == Atlas::Net::StreamConnect::SUCCEEDED)
{
m_codec = _sc->getCodec(*_bridge);
_encode = new Atlas::Objects::ObjectsEncoder(*m_codec);
m_codec->streamBegin();
// clean up
delete _sc;
_sc = NULL;
delete _timeout;
_timeout = NULL;
setStatus(CONNECTED);
onConnect();
} else {
// assume it all went wrong
handleFailure("Atlas negotiation failed");
hardDisconnect(false);
}
}
void BaseConnection::onConnect()
{
// tell anyone who cares with a signal
Connected.emit();
}
void BaseConnection::onConnectTimeout()
{
std::ostringstream os;
os << "Connect to " << _host << ':' << _port << " timed out";
handleTimeout(os.str());
hardDisconnect(false);
}
void BaseConnection::onNegotiateTimeout()
{
handleTimeout("Atlas negotiation timed out");
hardDisconnect(false);
}
void BaseConnection::setStatus(Status sc)
{
_status = sc;
}
int BaseConnection::getFileDescriptor()
{
if (!_stream)
throw InvalidOperation("Not connected, hence no FD");
return _stream->getSocket();
}
} // of namespace
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