public byte[] GetBytes(ScsiCommand cmd, byte[] immediateData, int offset, int count, bool isFinalData, bool willRead, bool willWrite, uint expected)
{
BasicHeaderSegment _basicHeader = new BasicHeaderSegment();
_basicHeader.Immediate = cmd.ImmediateDelivery;
_basicHeader.OpCode = OpCode.ScsiCommand;
_basicHeader.FinalPdu = isFinalData;
_basicHeader.TotalAhsLength = 0;
_basicHeader.DataSegmentLength = count;
_basicHeader.InitiatorTaskTag = _connection.Session.CurrentTaskTag;
byte[] buffer = new byte[48 + Utilities.RoundUp(count, 4)];
_basicHeader.WriteTo(buffer, 0);
buffer[1] = PackAttrByte(isFinalData, willRead, willWrite, cmd.TaskAttributes);
Utilities.WriteBytesBigEndian(_lun, buffer, 8);
Utilities.WriteBytesBigEndian(expected, buffer, 20);
Utilities.WriteBytesBigEndian(_connection.Session.CommandSequenceNumber, buffer, 24);
Utilities.WriteBytesBigEndian(_connection.ExpectedStatusSequenceNumber, buffer, 28);
cmd.WriteTo(buffer, 32);
if (immediateData != null && count != 0)
{
Array.Copy(immediateData, offset, buffer, 48, count);
}
return buffer;
}
public byte[] GetBytes(ulong lun, byte[] data, int offset, int count, bool isFinalData)
{
BasicHeaderSegment _basicHeader = new BasicHeaderSegment();
_basicHeader.Immediate = true;
_basicHeader.OpCode = OpCode.TextRequest;
_basicHeader.FinalPdu = isFinalData;
_basicHeader.TotalAhsLength = 0;
_basicHeader.DataSegmentLength = count;
_basicHeader.InitiatorTaskTag = _connection.Session.CurrentTaskTag;
_continue = !isFinalData;
_lun = lun;
_commandSequenceNumber = _connection.Session.CommandSequenceNumber;
_expectedStatusSequenceNumber = _connection.ExpectedStatusSequenceNumber;
byte[] buffer = new byte[Utilities.RoundUp(48 + count, 4)];
_basicHeader.WriteTo(buffer, 0);
buffer[1] |= (byte)(_continue ? 0x40 : 0x00);
Utilities.WriteBytesBigEndian(lun, buffer, 8);
Utilities.WriteBytesBigEndian(_targetTransferTag, buffer, 20);
Utilities.WriteBytesBigEndian(_commandSequenceNumber, buffer, 24);
Utilities.WriteBytesBigEndian(_expectedStatusSequenceNumber, buffer, 28);
Array.Copy(data, offset, buffer, 48, count);
return buffer;
}
public static ProtocolDataUnit ReadFrom(Stream stream, bool headerDigestEnabled, bool dataDigestEnabled)
{
int numRead = 0;
byte[] headerData = Utilities.ReadFully(stream, 48);
numRead += 48;
byte[] contentData = null;
if (headerDigestEnabled)
{
uint digest = ReadDigest(stream);
numRead += 4;
}
BasicHeaderSegment bhs = new BasicHeaderSegment();
bhs.ReadFrom(headerData, 0);
if (bhs.DataSegmentLength > 0)
{
contentData = Utilities.ReadFully(stream, bhs.DataSegmentLength);
numRead += bhs.DataSegmentLength;
if (dataDigestEnabled)
{
uint digest = ReadDigest(stream);
numRead += 4;
}
}
int rem = 4 - (numRead % 4);
if (rem != 4)
{
Utilities.ReadFully(stream, rem);
}
return new ProtocolDataUnit(headerData, contentData);
}
public byte[] GetBytes(byte[] data, int offset, int count, bool isFinalData, int dataSeqNumber, uint bufferOffset, uint targetTransferTag)
{
BasicHeaderSegment _basicHeader = new BasicHeaderSegment();
_basicHeader.Immediate = false;
_basicHeader.OpCode = OpCode.ScsiDataOut;
_basicHeader.FinalPdu = isFinalData;
_basicHeader.TotalAhsLength = 0;
_basicHeader.DataSegmentLength = count;
_basicHeader.InitiatorTaskTag = _connection.Session.CurrentTaskTag;
byte[] buffer = new byte[48 + Utilities.RoundUp(count, 4)];
_basicHeader.WriteTo(buffer, 0);
buffer[1] = (byte)(isFinalData ? 0x80 : 0x00);
Utilities.WriteBytesBigEndian(_lun, buffer, 8);
Utilities.WriteBytesBigEndian(targetTransferTag, buffer, 20);
Utilities.WriteBytesBigEndian(_connection.ExpectedStatusSequenceNumber, buffer, 28);
Utilities.WriteBytesBigEndian(dataSeqNumber, buffer, 36);
Utilities.WriteBytesBigEndian(bufferOffset, buffer, 40);
Array.Copy(data, offset, buffer, 48, count);
return buffer;
}
public byte[] GetBytes(byte[] data, int offset, int count, bool isFinalData)
{
_basicHeader = new BasicHeaderSegment();
_basicHeader.Immediate = true;
_basicHeader.OpCode = OpCode.LoginRequest;
_basicHeader.FinalPdu = isFinalData;
_basicHeader.TotalAhsLength = 0;
_basicHeader.DataSegmentLength = count;
_basicHeader.InitiatorTaskTag = _connection.Session.CurrentTaskTag;
_transit = isFinalData;
_continue = !isFinalData;
_currentStage = _connection.CurrentLoginStage;
if (_transit)
{
_nextStage = _connection.NextLoginStage;
}
_connectionId = _connection.Id;
_commandSequenceNumber = _connection.Session.CommandSequenceNumber;
_expectedStatusSequenceNumber = _connection.ExpectedStatusSequenceNumber;
byte[] buffer = new byte[Utilities.RoundUp(48 + count, 4)];
_basicHeader.WriteTo(buffer, 0);
buffer[1] = PackState();
buffer[2] = 0; // Max Version
buffer[3] = 0; // Min Version
Utilities.WriteBytesBigEndian(_connection.Session.InitiatorSessionId, buffer, 8);
Utilities.WriteBytesBigEndian(IsidQualifier, buffer, 12);
Utilities.WriteBytesBigEndian(_connection.Session.TargetSessionId, buffer, 14);
Utilities.WriteBytesBigEndian(_connectionId, buffer, 20);
Utilities.WriteBytesBigEndian(_commandSequenceNumber, buffer, 24);
Utilities.WriteBytesBigEndian(_expectedStatusSequenceNumber, buffer, 28);
Array.Copy(data, offset, buffer, 48, count);
return buffer;
}