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#include <QtCore/QDebug>
#include "sappeer.h"
#include "sapconnection.h"
#include "sapsocket.h"
SAPSocket::SAPSocket(SAPConnection *conn, int sessionId, const SAPChannelInfo &chanInfo) :
QObject(conn), _sessionId(sessionId), _info(chanInfo), _open(false),
_seqNum(0), _expectedSeqNum(0)
{
}
SAPPeer * SAPSocket::peer()
{
return connection()->peer();
}
SAPConnection * SAPSocket::connection()
{
return static_cast<SAPConnection*>(parent());
}
SAPChannelInfo SAPSocket::channelInfo() const
{
return _info;
}
bool SAPSocket::isOpen() const
{
return _open;
}
bool SAPSocket::messageAvailable() const
{
return !_in.empty();
}
QByteArray SAPSocket::receive()
{
if (!_in.empty()) {
return _in.dequeue();
} else {
return QByteArray();
}
}
bool SAPSocket::send(const QByteArray &data)
{
SAProtocol::DataFrame frame;
frame.withSeqNum = isWithSeqNum();
if (isReliable()) {
frame.seqNum = _seqNum++;
} else {
frame.seqNum = 0;
}
frame.unk_1 = 0;
frame.data = data;
return peer()->writeToSession(_sessionId, SAProtocol::packDataFrame(frame));
}
void SAPSocket::setOpen(bool open)
{
_open = open;
}
void SAPSocket::acceptIncomingData(const QByteArray &data)
{
if (data.isEmpty()) return;
SAProtocol::DataFrame frame = SAProtocol::unpackDataFrame(data, isWithSeqNum());
if (isReliable()) {
if (frame.seqNum != _expectedSeqNum) {
qWarning() << "Unexpected sequence number" << frame.seqNum
<< "on session" << _sessionId
<< "(expected " << _expectedSeqNum << ")";
}
_expectedSeqNum = frame.seqNum + 1;
// TODO Do we actually need to ack this somehow?
}
_in.enqueue(frame.data);
emit messageReceived();
}
int SAPSocket::sessionId() const
{
return _sessionId;
}
bool SAPSocket::isReliable() const
{
return _info.qosType() == SAPChannelInfo::QoSReliabilityEnable;
}
bool SAPSocket::isWithSeqNum() const
{
return _info.qosType() == SAPChannelInfo::QoSReliabilityDisable ||
_info.qosType() == SAPChannelInfo::QoSReliabilityEnable;
}
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