/// <summary>
/// Convert the IPMI request meeting into a byte stream for transmission
/// to the BMC over Serial.
/// [Byte 0] [Byte 1] [Byte 2] [Byte 3]
/// [StrChar] [rsAddr] [netFn] [chksum]
/// [Byte 4] [Byte 5] [Byte 6] [Byte 7] [Byte 8] [Byte 9]
/// [rqAddr] [rqSeq] [cmd] [payload] [cksum] [stop]
/// </summary>
/// <param name="IpmiRqSeq">Sequence id for message.</param>
/// <returns>byte array representing the Serial data to send.</returns>
internal byte[] GetBytes(IpmiTransport transport, byte IpmiRqSeq)
{
// payload lenght
int dataLength = GetPayloadLenght();
// payload bytes
byte[] payload = GetPayload(dataLength);
// response message lenght
int messageLength = dataLength;
if (transport == IpmiTransport.Serial)
{
// Add 9 bytes for 7 byte header and start + stop byte
// 09 bytes = byte[1] start, byte[2] rsAdd, byte[3] netFnAndrqLun, byte[4] checksum1
// byte[5] rqAddr, byte[6] rqSeqAndrsLun, byte[7] command, byte[x] payload
// byte[8] checksum, byte[09] stop.
messageLength += 9;
}
byte[] messagedata = new byte[messageLength];
if (transport == IpmiTransport.Serial)
{
// Step 1. Add Message Header.
#region Message header
messagedata[1] = 0x20; // rsAddr
messagedata[2] = (byte)((byte)this.IpmiFunction << 2); // netFN
messagedata[3] = 0x00; // checksum zero'd for now. Set after data.
messagedata[4] = 0x81; // for serial can be 0x8F;
messagedata[5] = (byte)((byte)IpmiRqSeq << 2); // rqSeq/rqLun
messagedata[6] = (byte)this.IpmiCommand; // cmd
#endregion
// Step 2. Add payload Data.
// Add ipmi message data
// dataIndex + 7 offsets encapsulated ipmi message header & start charactor
Buffer.BlockCopy(payload, 0, messagedata, 7, payload.Length);
// Step 3. Add Message Checksum
#region Message checksum
// Set checksum 1: Byte 0 = Start Char, Byte 1 = rsAdd,
// Byte 2 = netFn, Byte 3 = Checksum
messagedata[3] = IpmiSharedFunc.TwoComplementChecksum(1, 3, messagedata);
// Ipmi message encapsulation format checksum 2
// checksum 2 begins after checksum 1.
// checksum 2 calculated from rqAddr to end of data lenght.
messagedata[(7 + dataLength)] = IpmiSharedFunc.TwoComplementChecksum(4, (7 + dataLength), messagedata);
#endregion
}
return(messagedata);
}
