/// <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); } }