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 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(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[MathUtilities.RoundUp(48 + count, 4)];
_basicHeader.WriteTo(buffer, 0);
buffer[1] |= (byte)(_continue ? 0x40 : 0x00);
EndianUtilities.WriteBytesBigEndian(lun, buffer, 8);
EndianUtilities.WriteBytesBigEndian(_targetTransferTag, buffer, 20);
EndianUtilities.WriteBytesBigEndian(_commandSequenceNumber, buffer, 24);
EndianUtilities.WriteBytesBigEndian(_expectedStatusSequenceNumber, buffer, 28);
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;
}
public void Parse(byte[] headerData, int headerOffset, byte[] bodyData)
{
BasicHeaderSegment _headerSegment = new BasicHeaderSegment();
_headerSegment.ReadFrom(headerData, headerOffset);
if (_headerSegment.OpCode != OpCode.LoginResponse)
{
throw new InvalidProtocolException("Invalid opcode in response, expected " + OpCode.LoginResponse +
" was " + _headerSegment.OpCode);
}
UnpackState(headerData[headerOffset + 1]);
MaxVersion = headerData[headerOffset + 2];
ActiveVersion = headerData[headerOffset + 3];
TargetSessionId = Utilities.ToUInt16BigEndian(headerData, headerOffset + 14);
StatusPresent = true;
StatusSequenceNumber = Utilities.ToUInt32BigEndian(headerData, headerOffset + 24);
ExpectedCommandSequenceNumber = Utilities.ToUInt32BigEndian(headerData, headerOffset + 28);
MaxCommandSequenceNumber = Utilities.ToUInt32BigEndian(headerData, headerOffset + 32);
StatusClass = headerData[headerOffset + 36];
StatusCode = (LoginStatusCode)Utilities.ToUInt16BigEndian(headerData, headerOffset + 36);
TextData = bodyData;
}
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(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 void Parse(byte[] headerData, int headerOffset, byte[] bodyData)
{
Header = new BasicHeaderSegment();
Header.ReadFrom(headerData, headerOffset);
if (Header.OpCode != OpCode.ScsiDataIn)
{
throw new InvalidProtocolException("Invalid opcode in response, expected " + OpCode.ScsiDataIn + " was " +
Header.OpCode);
}
UnpackFlags(headerData[headerOffset + 1]);
if (StatusPresent)
{
Status = (ScsiStatus)headerData[headerOffset + 3];
}
Lun = EndianUtilities.ToUInt64BigEndian(headerData, headerOffset + 8);
TargetTransferTag = EndianUtilities.ToUInt32BigEndian(headerData, headerOffset + 20);
StatusSequenceNumber = EndianUtilities.ToUInt32BigEndian(headerData, headerOffset + 24);
ExpectedCommandSequenceNumber = EndianUtilities.ToUInt32BigEndian(headerData, headerOffset + 28);
MaxCommandSequenceNumber = EndianUtilities.ToUInt32BigEndian(headerData, headerOffset + 32);
DataSequenceNumber = EndianUtilities.ToUInt32BigEndian(headerData, headerOffset + 36);
BufferOffset = EndianUtilities.ToUInt32BigEndian(headerData, headerOffset + 40);
ResidualCount = EndianUtilities.ToUInt32BigEndian(headerData, headerOffset + 44);
ReadData = bodyData;
}
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);
}
public void Parse(byte[] headerData, int headerOffset)
{
Header = new BasicHeaderSegment();
Header.ReadFrom(headerData, headerOffset);
if (Header.OpCode != OpCode.Reject)
{
throw new InvalidProtocolException("Invalid opcode in response, expected " + OpCode.Reject + " was " +
Header.OpCode);
}
Reason = (RejectReason)headerData[headerOffset + 2];
StatusSequenceNumber = Utilities.ToUInt32BigEndian(headerData, headerOffset + 24);
ExpectedCommandSequenceNumber = Utilities.ToUInt32BigEndian(headerData, headerOffset + 28);
MaxCommandSequenceNumber = Utilities.ToUInt32BigEndian(headerData, headerOffset + 32);
DataSequenceNumber = Utilities.ToUInt32BigEndian(headerData, headerOffset + 36);
}
public byte[] GetBytes(LogoutReason reason)
{
BasicHeaderSegment _basicHeader = new BasicHeaderSegment();
_basicHeader.Immediate = true;
_basicHeader.OpCode = OpCode.LogoutRequest;
_basicHeader.FinalPdu = true;
_basicHeader.TotalAhsLength = 0;
_basicHeader.DataSegmentLength = 0;
_basicHeader.InitiatorTaskTag = _connection.Session.CurrentTaskTag;
byte[] buffer = new byte[MathUtilities.RoundUp(48, 4)];
_basicHeader.WriteTo(buffer, 0);
buffer[1] |= (byte)((byte)reason & 0x7F);
EndianUtilities.WriteBytesBigEndian(_connection.Id, buffer, 20);
EndianUtilities.WriteBytesBigEndian(_connection.Session.CommandSequenceNumber, buffer, 24);
EndianUtilities.WriteBytesBigEndian(_connection.ExpectedStatusSequenceNumber, buffer, 28);
return(buffer);
}
public void Parse(byte[] headerData, int headerOffset)
{
BasicHeaderSegment _headerSegment = new BasicHeaderSegment();
_headerSegment.ReadFrom(headerData, headerOffset);
if (_headerSegment.OpCode != OpCode.LogoutResponse)
{
throw new InvalidProtocolException("Invalid opcode in response, expected " + OpCode.LogoutResponse +
" was " + _headerSegment.OpCode);
}
Response = (LogoutResponseCode)headerData[headerOffset + 2];
StatusSequenceNumber = EndianUtilities.ToUInt32BigEndian(headerData, headerOffset + 24);
ExpectedCommandSequenceNumber = EndianUtilities.ToUInt32BigEndian(headerData, headerOffset + 28);
MaxCommandSequenceNumber = EndianUtilities.ToUInt32BigEndian(headerData, headerOffset + 32);
Time2Wait = EndianUtilities.ToUInt16BigEndian(headerData, headerOffset + 40);
Time2Retain = EndianUtilities.ToUInt16BigEndian(headerData, headerOffset + 42);
}
public void Parse(byte[] headerData, int headerOffset, byte[] bodyData)
{
BasicHeaderSegment _headerSegment = new BasicHeaderSegment();
_headerSegment.ReadFrom(headerData, headerOffset);
if (_headerSegment.OpCode != OpCode.TextResponse)
{
throw new InvalidProtocolException("Invalid opcode in response, expected " + OpCode.TextResponse +
" was " + _headerSegment.OpCode);
}
Continue = (headerData[headerOffset + 1] & 0x40) != 0;
_lun = Utilities.ToUInt64BigEndian(headerData, headerOffset + 8);
_targetTransferTag = Utilities.ToUInt32BigEndian(headerData, headerOffset + 20);
StatusSequenceNumber = Utilities.ToUInt32BigEndian(headerData, headerOffset + 24);
ExpectedCommandSequenceNumber = Utilities.ToUInt32BigEndian(headerData, headerOffset + 28);
MaxCommandSequenceNumber = Utilities.ToUInt32BigEndian(headerData, headerOffset + 32);
TextData = bodyData;
}
public void Parse(byte[] headerData, int headerOffset)
{
Header = new BasicHeaderSegment();
Header.ReadFrom(headerData, headerOffset);
if (Header.OpCode != OpCode.ScsiResponse)
{
throw new InvalidProtocolException("Invalid opcode in response, expected " + OpCode.ScsiResponse +
" was " + Header.OpCode);
}
ResponseCode = headerData[headerOffset + 2];
StatusPresent = true;
Status = (ScsiStatus)headerData[headerOffset + 3];
StatusSequenceNumber = EndianUtilities.ToUInt32BigEndian(headerData, headerOffset + 24);
ExpectedCommandSequenceNumber = EndianUtilities.ToUInt32BigEndian(headerData, headerOffset + 28);
MaxCommandSequenceNumber = EndianUtilities.ToUInt32BigEndian(headerData, headerOffset + 32);
ExpectedDataSequenceNumber = EndianUtilities.ToUInt32BigEndian(headerData, headerOffset + 36);
BidiReadResidualCount = EndianUtilities.ToUInt32BigEndian(headerData, headerOffset + 40);
ResidualCount = EndianUtilities.ToUInt32BigEndian(headerData, headerOffset + 44);
}
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 void Parse(byte[] headerData, int headerOffset)
{
StatusPresent = false;
Header = new BasicHeaderSegment();
Header.ReadFrom(headerData, headerOffset);
if (Header.OpCode != OpCode.ReadyToTransfer)
{
throw new InvalidProtocolException("Invalid opcode in response, expected " + OpCode.ReadyToTransfer +
" was " + Header.OpCode);
}
Lun = Utilities.ToUInt64BigEndian(headerData, headerOffset + 8);
TargetTransferTag = Utilities.ToUInt32BigEndian(headerData, headerOffset + 20);
StatusSequenceNumber = Utilities.ToUInt32BigEndian(headerData, headerOffset + 24);
ExpectedCommandSequenceNumber = Utilities.ToUInt32BigEndian(headerData, headerOffset + 28);
MaxCommandSequenceNumber = Utilities.ToUInt32BigEndian(headerData, headerOffset + 32);
ReadyToTransferSequenceNumber = Utilities.ToUInt32BigEndian(headerData, headerOffset + 36);
BufferOffset = Utilities.ToUInt32BigEndian(headerData, headerOffset + 40);
DesiredTransferLength = Utilities.ToUInt32BigEndian(headerData, headerOffset + 44);
}
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;
}