WSJT-X/MessageClient.cpp
Bill Somerville 129c3ccde0 Do not let exceptions cross Qt signal dispatcher
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@5252 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
2015-04-20 17:47:32 +00:00

297 lines
8.0 KiB
C++

#include "MessageClient.hpp"
#include <stdexcept>
#include <QUdpSocket>
#include <QHostInfo>
#include <QTimer>
#include "NetworkMessage.hpp"
#include "pimpl_impl.hpp"
#include "moc_MessageClient.cpp"
class MessageClient::impl
: public QUdpSocket
{
Q_OBJECT;
public:
impl (QString const& id, port_type server_port, MessageClient * self)
: self_ {self}
, id_ {id}
, server_port_ {server_port}
, heartbeat_timer_ {new QTimer {this}}
{
connect (heartbeat_timer_, &QTimer::timeout, this, &impl::heartbeat);
connect (this, &QIODevice::readyRead, this, &impl::pending_datagrams);
heartbeat_timer_->start (NetworkMessage::pulse * 1000);
// bind to an ephemeral port
bind ();
}
~impl ()
{
closedown ();
}
void parse_message (QByteArray const& msg);
void pending_datagrams ();
void heartbeat ();
void closedown ();
bool check_status (QDataStream const&) const;
Q_SLOT void host_info_results (QHostInfo);
MessageClient * self_;
QString id_;
QHostAddress server_;
port_type server_port_;
QTimer * heartbeat_timer_;
};
#include "MessageClient.moc"
void MessageClient::impl::host_info_results (QHostInfo host_info)
{
if (QHostInfo::NoError != host_info.error ())
{
Q_EMIT self_->error ("UDP server lookup failed:\n" + host_info.errorString ());
}
else if (host_info.addresses ().size ())
{
server_ = host_info.addresses ()[0];
}
}
void MessageClient::impl::pending_datagrams ()
{
while (hasPendingDatagrams ())
{
QByteArray datagram;
datagram.resize (pendingDatagramSize ());
QHostAddress sender_address;
port_type sender_port;
if (0 <= readDatagram (datagram.data (), datagram.size (), &sender_address, &sender_port))
{
parse_message (datagram);
}
}
}
void MessageClient::impl::parse_message (QByteArray const& msg)
{
try
{
//
// message format is described in NetworkMessage.hpp
//
NetworkMessage::Reader in {msg};
if (id_ == in.id ()) // for us
{
//
// message format is described in NetworkMessage.hpp
//
switch (in.type ())
{
case NetworkMessage::Reply:
{
// unpack message
QTime time;
qint32 snr;
float delta_time;
quint32 delta_frequency;
QByteArray mode;
QByteArray message;
in >> time >> snr >> delta_time >> delta_frequency >> mode >> message;
if (check_status (in))
{
Q_EMIT self_->reply (time, snr, delta_time, delta_frequency
, QString::fromUtf8 (mode), QString::fromUtf8 (message));
}
}
break;
case NetworkMessage::Replay:
if (check_status (in))
{
Q_EMIT self_->replay ();
}
break;
default:
// Ignore
break;
}
}
}
catch (std::exception const& e)
{
Q_EMIT self_->error (QString {"MessageClient exception: %1"}.arg (e.what ()));
}
catch (...)
{
Q_EMIT self_->error ("Unexpected exception in MessageClient");
}
}
void MessageClient::impl::heartbeat ()
{
if (server_port_ && !server_.isNull ())
{
QByteArray message;
NetworkMessage::Builder hb {&message, NetworkMessage::Heartbeat, id_};
if (check_status (hb))
{
writeDatagram (message, server_, server_port_);
}
}
}
void MessageClient::impl::closedown ()
{
if (server_port_ && !server_.isNull ())
{
QByteArray message;
NetworkMessage::Builder out {&message, NetworkMessage::Close, id_};
if (check_status (out))
{
writeDatagram (message, server_, server_port_);
}
}
}
bool MessageClient::impl::check_status (QDataStream const& stream) const
{
auto stat = stream.status ();
switch (stat)
{
case QDataStream::ReadPastEnd:
Q_EMIT self_->error ("Message serialization error: read failed");
break;
case QDataStream::ReadCorruptData:
Q_EMIT self_->error ("Message serialization error: read corrupt data");
break;
case QDataStream::WriteFailed:
Q_EMIT self_->error ("Message serialization error: write error");
break;
default:
break;
}
return QDataStream::Ok == stat;
}
MessageClient::MessageClient (QString const& id, QString const& server, port_type server_port, QObject * self)
: QObject {self}
, m_ {id, server_port, this}
{
connect (&*m_, static_cast<void (impl::*) (impl::SocketError)> (&impl::error)
, [this] (impl::SocketError /* e */)
{
Q_EMIT error (m_->errorString ());
});
set_server (server);
}
QHostAddress MessageClient::server_address () const
{
return m_->server_;
}
auto MessageClient::server_port () const -> port_type
{
return m_->server_port_;
}
void MessageClient::set_server (QString const& server)
{
m_->server_.clear ();
if (!server.isEmpty ())
{
// queue a host address lookup
QHostInfo::lookupHost (server, &*m_, SLOT (host_info_results (QHostInfo)));
}
}
void MessageClient::set_server_port (port_type server_port)
{
m_->server_port_ = server_port;
}
void MessageClient::send_raw_datagram (QByteArray const& message, QHostAddress const& dest_address
, port_type dest_port)
{
if (dest_port && !dest_address.isNull ())
{
m_->writeDatagram (message, dest_address, dest_port);
}
}
void MessageClient::status_update (Frequency f, QString const& mode, QString const& dx_call
, QString const& report, QString const& tx_mode)
{
if (m_->server_port_ && !m_->server_.isNull ())
{
QByteArray message;
NetworkMessage::Builder out {&message, NetworkMessage::Status, m_->id_};
out << f << mode.toUtf8 () << dx_call.toUtf8 () << report.toUtf8 () << tx_mode.toUtf8 ();
if (m_->check_status (out))
{
m_->writeDatagram (message, m_->server_, m_->server_port_);
}
}
}
void MessageClient::decode (bool is_new, QTime time, qint32 snr, float delta_time, quint32 delta_frequency
, QString const& mode, QString const& message_text)
{
if (m_->server_port_ && !m_->server_.isNull ())
{
QByteArray message;
NetworkMessage::Builder out {&message, NetworkMessage::Decode, m_->id_};
out << is_new << time << snr << delta_time << delta_frequency << mode.toUtf8 () << message_text.toUtf8 ();
if (m_->check_status (out))
{
m_->writeDatagram (message, m_->server_, m_->server_port_);
}
}
}
void MessageClient::clear_decodes ()
{
if (m_->server_port_ && !m_->server_.isNull ())
{
QByteArray message;
NetworkMessage::Builder out {&message, NetworkMessage::Clear, m_->id_};
if (m_->check_status (out))
{
m_->writeDatagram (message, m_->server_, m_->server_port_);
}
}
}
void MessageClient::qso_logged (QDateTime time, QString const& dx_call, QString const& dx_grid
, Frequency dial_frequency, QString const& mode, QString const& report_sent
, QString const& report_received, QString const& tx_power
, QString const& comments, QString const& name)
{
if (m_->server_port_ && !m_->server_.isNull ())
{
QByteArray message;
NetworkMessage::Builder out {&message, NetworkMessage::QSOLogged, m_->id_};
out << time << dx_call.toUtf8 () << dx_grid.toUtf8 () << dial_frequency << mode.toUtf8 ()
<< report_sent.toUtf8 () << report_received.toUtf8 () << tx_power.toUtf8 () << comments.toUtf8 () << name.toUtf8 ();
if (m_->check_status (out))
{
m_->writeDatagram (message, m_->server_, m_->server_port_);
}
}
}