private T ParseResponse <T>(ProtocolDataUnit pdu)
where T : BaseResponse, new()
{
BaseResponse resp;
switch (pdu.OpCode)
{
case OpCode.LoginResponse:
resp = new LoginResponse();
break;
case OpCode.LogoutResponse:
resp = new LogoutResponse();
break;
case OpCode.ReadyToTransfer:
resp = new ReadyToTransferPacket();
break;
case OpCode.Reject:
resp = new RejectPacket();
break;
case OpCode.ScsiDataIn:
resp = new DataInPacket();
break;
case OpCode.ScsiResponse:
resp = new Response();
break;
case OpCode.TextResponse:
resp = new TextResponse();
break;
default:
throw new InvalidProtocolException("Unrecognized response opcode: " + pdu.OpCode);
}
resp.Parse(pdu);
if (resp.StatusPresent)
{
SeenStatusSequenceNumber(resp.StatusSequenceNumber);
}
T result = resp as T;
if (result == null)
{
throw new InvalidProtocolException("Unexpected response, expected " + typeof(T) + ", got " + result.GetType());
}
return(result);
}
private ProtocolDataUnit ReadPdu()
{
ProtocolDataUnit pdu = ProtocolDataUnit.ReadFrom(_stream, HeaderDigest != Digest.None, DataDigest != Digest.None);
if (pdu.OpCode == OpCode.Reject)
{
RejectPacket pkt = new RejectPacket();
pkt.Parse(pdu);
throw new IscsiException("Target sent reject packet, reason " + pkt.Reason);
}
return(pdu);
}