/// <summary>
/// Used during sending source packet, Add RDPUDP_ACK_OF_ACKVECTOR_HEADER structure into the packet to update OutSnAckOfAcksSeqNum
/// </summary>
/// <param name="eudpPacket">Packet to be sent</param>
private void UpdateOutSnAckOfAcksSeqNum(RdpeudpPacket eudpPacket)
{
if (newOutSnAckOfAcksSeqNum == null &&
SendWindowStartPosition - 1 - OutSnAckOfAcksSeqNum > this.SocketConfig.changeSnAckOfAcksSeqNumInterval)
{
Monitor.Enter(updateAckOfAckLock);
if (newOutSnAckOfAcksSeqNum == null &&
SendWindowStartPosition - 1 - OutSnAckOfAcksSeqNum > this.SocketConfig.changeSnAckOfAcksSeqNumInterval)
{
newOutSnAckOfAcksSeqNum = SendWindowStartPosition - 1;
RDPUDP_ACK_OF_ACKVECTOR_HEADER ackOfAckVector = new RDPUDP_ACK_OF_ACKVECTOR_HEADER();
ackOfAckVector.snAckOfAcksSeqNum = newOutSnAckOfAcksSeqNum.Value;
eudpPacket.ackOfAckVector = ackOfAckVector;
eudpPacket.fecHeader.uFlags = RDPUDP_FLAG.RDPUDP_FLAG_ACK_OF_ACKS | eudpPacket.fecHeader.uFlags;
seqNumofPacketWithAckOfAckVector = eudpPacket.sourceHeader.Value.snSourceStart;
}
Monitor.Exit(updateAckOfAckLock);
}
}
public override bool Decode(PduMarshaler marshaler)
{
try
{
fecHeader.snSourceAck = marshaler.ReadUInt32();
fecHeader.uReceiveWindowSize = marshaler.ReadUInt16();
fecHeader.uFlags = (RDPUDP_FLAG)marshaler.ReadUInt16();
if (fecHeader.uFlags.HasFlag(RDPUDP_FLAG.RDPUDP_FLAG_SYN))
{
RDPUDP_SYNDATA_PAYLOAD synData = new RDPUDP_SYNDATA_PAYLOAD();
synData.snInitialSequenceNumber = marshaler.ReadUInt32();
synData.uUpStreamMtu = marshaler.ReadUInt16();
synData.uDownStreamMtu = marshaler.ReadUInt16();
// This datagram MUST be zero-padded to increase the size of this datagram to 1232 bytes.
if (fecHeader.uFlags.HasFlag(RDPUDP_FLAG.RDPUDP_FLAG_CORRELATION_ID))
{
RDPUDP_CORRELATION_ID_PAYLOAD correlationId = new RDPUDP_CORRELATION_ID_PAYLOAD();
correlationId.uCorrelationId = marshaler.ReadBytes(16);
this.CorrelationId = correlationId;
correlationId.uReserved = marshaler.ReadBytes(16);
}
this.padding = marshaler.ReadToEnd();
this.SynData = synData;
return true;
}
if (fecHeader.uFlags.HasFlag(RDPUDP_FLAG.RDPUDP_FLAG_ACK))
{
// ACK.
RDPUDP_ACK_VECTOR_HEADER ackVector = new RDPUDP_ACK_VECTOR_HEADER();
ackVector.uAckVectorSize = marshaler.ReadUInt16();
ackVector.AckVectorElement = new AckVector[ackVector.uAckVectorSize];
List<byte> ackVecElementList = new List<byte>(marshaler.ReadBytes(ackVector.AckVectorElement.Length));
ackVecElementList.Reverse();
for (int i = 0; i < ackVector.AckVectorElement.Length; i++)
{
byte vecByte = ackVecElementList[i];
ackVector.AckVectorElement[i].Length = (byte)(0x3F & vecByte);
ackVector.AckVectorElement[i].State = (VECTOR_ELEMENT_STATE)(vecByte >> 6);
}
this.ackVectorHeader = ackVector;
// Padding (variable): A variable-sized array, of length zero or more,
// such that this structure ends on a DWORD ([MS-DTYP] section 2.2.9) boundary.
int padLen = 4 - (2 + ackVector.AckVectorElement.Length) % 4;
if (padLen > 0 && padLen != 4)
{
this.padding = marshaler.ReadBytes(padLen);
}
// Ack of Acks.
if (fecHeader.uFlags.HasFlag(RDPUDP_FLAG.RDPUDP_FLAG_ACK_OF_ACKS))
{
RDPUDP_ACK_OF_ACKVECTOR_HEADER aoaHeader = new RDPUDP_ACK_OF_ACKVECTOR_HEADER();
aoaHeader.snAckOfAcksSeqNum = marshaler.ReadUInt32();
this.ackOfAckVector = aoaHeader;
}
}
if (fecHeader.uFlags.HasFlag(RDPUDP_FLAG.RDPUDP_FLAG_DATA))
{
if (!fecHeader.uFlags.HasFlag(RDPUDP_FLAG.RDPUDP_FLAG_FEC))
{
// Source Data.
RDPUDP_SOURCE_PAYLOAD_HEADER srcHeader = new RDPUDP_SOURCE_PAYLOAD_HEADER();
srcHeader.snCoded = marshaler.ReadUInt32();
srcHeader.snSourceStart = marshaler.ReadUInt32();
this.sourceHeader = srcHeader;
}
else
{
// FEC Data.
RDPUDP_FEC_PAYLOAD_HEADER fecDataHeader = new RDPUDP_FEC_PAYLOAD_HEADER();
fecDataHeader.snCoded = marshaler.ReadUInt32();
fecDataHeader.snSourceStart = marshaler.ReadUInt32();
fecDataHeader.uRange = marshaler.ReadByte();
fecDataHeader.uFecIndex = marshaler.ReadByte();
fecDataHeader.uPadding = marshaler.ReadUInt16();
this.fecPayloadHeader = fecDataHeader;
}
this.payload = marshaler.ReadToEnd();
}
return true;
}
catch
{
return false;
}
}
public override bool Decode(PduMarshaler marshaler)
{
try
{
fecHeader.snSourceAck = marshaler.ReadUInt32();
fecHeader.uReceiveWindowSize = marshaler.ReadUInt16();
fecHeader.uFlags = (RDPUDP_FLAG)marshaler.ReadUInt16();
if (fecHeader.uFlags.HasFlag(RDPUDP_FLAG.RDPUDP_FLAG_SYN))
{
RDPUDP_SYNDATA_PAYLOAD synData = new RDPUDP_SYNDATA_PAYLOAD();
synData.snInitialSequenceNumber = marshaler.ReadUInt32();
synData.uUpStreamMtu = marshaler.ReadUInt16();
synData.uDownStreamMtu = marshaler.ReadUInt16();
// This datagram MUST be zero-padded to increase the size of this datagram to 1232 bytes.
if (fecHeader.uFlags.HasFlag(RDPUDP_FLAG.RDPUDP_FLAG_CORRELATION_ID))
{
RDPUDP_CORRELATION_ID_PAYLOAD correlationId = new RDPUDP_CORRELATION_ID_PAYLOAD();
correlationId.uCorrelationId = marshaler.ReadBytes(16);
this.CorrelationId = correlationId;
correlationId.uReserved = marshaler.ReadBytes(16);
}
if (fecHeader.uFlags.HasFlag(RDPUDP_FLAG.RDPUDP_FLAG_SYNEX))
{
RDPUDP_SYNDATAEX_PAYLOAD synDataEx = new RDPUDP_SYNDATAEX_PAYLOAD();
synDataEx.uSynExFlags = (uSynExFlags_Values)marshaler.ReadUInt16();
synDataEx.uUdpVer = (uUdpVer_Values)marshaler.ReadUInt16();
this.SynDataEx = synDataEx;
}
this.padding = marshaler.ReadToEnd();
this.SynData = synData;
return(true);
}
if (fecHeader.uFlags.HasFlag(RDPUDP_FLAG.RDPUDP_FLAG_ACK))
{
// ACK.
RDPUDP_ACK_VECTOR_HEADER ackVector = new RDPUDP_ACK_VECTOR_HEADER();
ackVector.uAckVectorSize = marshaler.ReadUInt16();
ackVector.AckVectorElement = new AckVector[ackVector.uAckVectorSize];
List <byte> ackVecElementList = new List <byte>(marshaler.ReadBytes(ackVector.AckVectorElement.Length));
ackVecElementList.Reverse();
for (int i = 0; i < ackVector.AckVectorElement.Length; i++)
{
byte vecByte = ackVecElementList[i];
ackVector.AckVectorElement[i].Length = (byte)(0x3F & vecByte);
ackVector.AckVectorElement[i].State = (VECTOR_ELEMENT_STATE)(vecByte >> 6);
}
this.ackVectorHeader = ackVector;
// Padding (variable): A variable-sized array, of length zero or more,
// such that this structure ends on a DWORD ([MS-DTYP] section 2.2.9) boundary.
int padLen = 4 - (2 + ackVector.AckVectorElement.Length) % 4;
if (padLen > 0 && padLen != 4)
{
this.padding = marshaler.ReadBytes(padLen);
}
// Ack of Acks.
if (fecHeader.uFlags.HasFlag(RDPUDP_FLAG.RDPUDP_FLAG_ACK_OF_ACKS))
{
RDPUDP_ACK_OF_ACKVECTOR_HEADER aoaHeader = new RDPUDP_ACK_OF_ACKVECTOR_HEADER();
aoaHeader.snAckOfAcksSeqNum = marshaler.ReadUInt32();
this.ackOfAckVector = aoaHeader;
}
}
if (fecHeader.uFlags.HasFlag(RDPUDP_FLAG.RDPUDP_FLAG_DATA))
{
if (!fecHeader.uFlags.HasFlag(RDPUDP_FLAG.RDPUDP_FLAG_FEC))
{
// Source Data.
RDPUDP_SOURCE_PAYLOAD_HEADER srcHeader = new RDPUDP_SOURCE_PAYLOAD_HEADER();
srcHeader.snCoded = marshaler.ReadUInt32();
srcHeader.snSourceStart = marshaler.ReadUInt32();
this.sourceHeader = srcHeader;
}
else
{
// FEC Data.
RDPUDP_FEC_PAYLOAD_HEADER fecDataHeader = new RDPUDP_FEC_PAYLOAD_HEADER();
fecDataHeader.snCoded = marshaler.ReadUInt32();
fecDataHeader.snSourceStart = marshaler.ReadUInt32();
fecDataHeader.uRange = marshaler.ReadByte();
fecDataHeader.uFecIndex = marshaler.ReadByte();
fecDataHeader.uPadding = marshaler.ReadUInt16();
this.fecPayloadHeader = fecDataHeader;
}
this.payload = marshaler.ReadToEnd();
}
return(true);
}
catch
{
return(false);
}
}
/// <summary>
/// Used during sending source packet, Add RDPUDP_ACK_OF_ACKVECTOR_HEADER structure into the packet to update OutSnAckOfAcksSeqNum
/// </summary>
/// <param name="eudpPacket">Packet to be sent</param>
private void UpdateOutSnAckOfAcksSeqNum(RdpeudpPacket eudpPacket)
{
if (newOutSnAckOfAcksSeqNum == null
&& SendWindowStartPosition - 1 - OutSnAckOfAcksSeqNum > this.SocketConfig.changeSnAckOfAcksSeqNumInterval)
{
Monitor.Enter(updateAckOfAckLock);
if (newOutSnAckOfAcksSeqNum == null
&& SendWindowStartPosition - 1 - OutSnAckOfAcksSeqNum > this.SocketConfig.changeSnAckOfAcksSeqNumInterval)
{
newOutSnAckOfAcksSeqNum = SendWindowStartPosition - 1;
RDPUDP_ACK_OF_ACKVECTOR_HEADER ackOfAckVector = new RDPUDP_ACK_OF_ACKVECTOR_HEADER();
ackOfAckVector.snAckOfAcksSeqNum = newOutSnAckOfAcksSeqNum.Value;
eudpPacket.ackOfAckVector = ackOfAckVector;
eudpPacket.fecHeader.uFlags = RDPUDP_FLAG.RDPUDP_FLAG_ACK_OF_ACKS | eudpPacket.fecHeader.uFlags;
seqNumofPacketWithAckOfAckVector = eudpPacket.sourceHeader.Value.snSourceStart;
}
Monitor.Exit(updateAckOfAckLock);
}
}
