// todo should be in a behave block
// then we wouldn't be messing with stream seq numbers.
private Chunk[] dcepDeal(SCTPStream s, DataChunk dc, DataChannelOpen dcep)
{
Chunk[] rep = null;
//logger.LogDebug("dealing with a decp for stream " + dc.getDataAsString());
if (!dcep.isAck())
{
//logger.LogDebug("decp is not an ack... ");
SCTPStreamBehaviour behave = dcep.mkStreamBehaviour();
s.setBehave(behave);
s.setLabel(dcep.getLabel());
lock (s)
{
int seqIn = s.getNextMessageSeqIn();
s.setNextMessageSeqIn(seqIn + 1);
int seqOut = s.getNextMessageSeqOut();
s.setNextMessageSeqOut(seqOut + 1);
}
rep = new Chunk[1];
DataChunk ack = dc.mkAck(dcep);
s.outbound(ack);
ack.setTsn(_nearTSN++);
// check rollover - will break at maxint.
rep[0] = ack;
}
else
{
//logger.LogDebug("got a dcep ack for " + s.getLabel());
SCTPStreamBehaviour behave = dcep.mkStreamBehaviour();
s.setBehave(behave);
lock (s)
{
int seqIn = s.getNextMessageSeqIn();
s.setNextMessageSeqIn(seqIn + 1);
int seqOut = s.getNextMessageSeqOut();
s.setNextMessageSeqOut(seqOut + 1);
}
}
return(rep);
}
/**
* available datachunks are put here to be filled with data from this
* outbound message
*
* @param dc
*/
public void fill(DataChunk dc)
{
int dsz = dc.getCapacity();
int remain = _data.Length - _offset;
if (_offset == 0)
{
if (remain <= dsz)
{
// only one chunk
dc.setFlags(DataChunk.SINGLEFLAG);
dc.setData(_data);
_offset = _data.Length;
}
else
{
// first chunk of many
dc.setFlags(DataChunk.BEGINFLAG);
dc.setData(_data, _offset, dsz);
_offset += dsz;
}
}
else // not first
if (remain <= dsz)
{
// last chunk, this will all fit.
dc.setFlags(DataChunk.ENDFLAG);
dc.setData(_data, _offset, remain);
_offset += remain; // should be _data_length now
}
else
{
// middle chunk.
dc.setFlags(0);
dc.setData(_data, _offset, dsz);
_offset += dsz;
}
dc.setPpid(_pPid);
dc.setsSeqNo(_mseq);
_stream.outbound(dc);
}
