/// <summary>
/// Expect a packet.
/// </summary>
/// <returns>The PccrrPacket.</returns>
public PccrrPacket ExpectPacket()
{
if (this.httpClientTransport == null)
{
throw new InvalidOperationException("The transport is null for not connected.");
}
byte[] payloadBuffer = null;
this.httpClientTransport.Receive(ref payloadBuffer);
PccrrPacket resp = null;
resp = new PccrrUtitlity().DecodeResponseMessage(payloadBuffer);
return(resp);
}
/// <summary>
/// Send a packet.
/// </summary>
/// <param name="packet">The packet need to be sent.</param>
public void SendPacket(PccrrPacket packet)
{
if (packet == null)
{
throw new ArgumentNullException("packet");
}
if (this.httpServerTransport == null)
{
throw new InvalidOperationException("The transport is null for not connected.");
}
byte[] bytes = new byte[] { };
switch (packet.PacketType)
{
case MsgType_Values.MSG_NEGO_RESP:
bytes = ((PccrrNegoResponsePacket)packet).Encode();
break;
case MsgType_Values.MSG_BLKLIST:
bytes = ((PccrrBLKLISTResponsePacket)packet).Encode();
break;
case MsgType_Values.MSG_BLK:
bytes = ((PccrrBLKResponsePacket)packet).Encode();
break;
}
//try
//{
this.httpServerTransport.Send(null, bytes, this.httpListenerContext);
//}
//catch (HttpListenerException ex)
//{
// if (this.logger != null)
// {
// this.logger.AddDebug(
// string.Format(
// "Unexpected exception send packet failed: {0}",
// ex.Message));
// }
// throw;
//}
}
/// <summary>
/// Decode a packet.
/// </summary>
/// <param name="uri">The uri of the request.</param>
/// <param name="httpMethod">The http method.</param>
/// <param name="rawdata">The rawdata.</param>
/// <returns>The PccrrPacket.</returns>
private PccrrPacket DecodePacket(Uri uri, HttpMethod httpMethod, byte[] rawdata)
{
if (uri == null)
{
throw new ArgumentNullException("uri");
}
if (this.httpServerTransport == null)
{
throw new InvalidOperationException("The transport is null for not connected.");
}
PccrrPacket req = null;
lock (this.obj)
{
req = new PccrrUtitlity().DecodeRequestMessage(rawdata, uri, httpMethod);
return(req);
}
}
/// <summary>
/// Verify the received message from client.
/// </summary>
/// <param name="remoteAddr">The remote address.</param>
/// <param name="pccrrPacket">The pccrrPacket.</param>
private void RetrievalTransport_Receive(IPEndPoint remoteAddr, PccrrPacket pccrrPacket)
{
PccrrGETBLKSRequestPacket pccrrGETBLKSRequestPacket = pccrrPacket as PccrrGETBLKSRequestPacket;
if (pccrrGETBLKSRequestPacket != null)
{
MSG_GETBLKS msgGETBLKS = pccrrGETBLKSRequestPacket.MsgGetBLKS;
MESSAGE_HEADER messageHEADER = pccrrGETBLKSRequestPacket.MessageHeader;
this.sid = msgGETBLKS.SegmentID;
REQUEST_MESSAGE requestMESSAGE = new REQUEST_MESSAGE();
requestMESSAGE.MESSAGEBODY = msgGETBLKS;
requestMESSAGE.MESSAGEHEADER = messageHEADER;
this.uiPayload = Marshal.SizeOf(messageHEADER) + Marshal.SizeOf(msgGETBLKS) + 24;
PccrrBothRoleCaptureCode.CaptureBlockRangeRequirements(msgGETBLKS.ReqBlockRanges[0]);
PccrrBothRoleCaptureCode.CaptureMessageHeaderRequirements(messageHEADER, this.uiPayload);
this.VerifyGetBlocks(msgGETBLKS);
this.VerifyRequestMessage(requestMESSAGE);
PccrrBothRoleCaptureCode.CaptureSegmentIdRequirements(msgGETBLKS.SegmentID);
PccrrBothRoleCaptureCode.CaptureHttpRequirements();
PccrrBothRoleCaptureCode.CaptureMessageRequirements();
this.ReceiveMsgGetBlk(msgGETBLKS.ReqBlockRanges[0].Index);
}
else
{
PccrrGETBLKLISTRequestPacket pccrrGETBLKLISTRequestPacket = pccrrPacket as PccrrGETBLKLISTRequestPacket;
if (pccrrGETBLKLISTRequestPacket != null)
{
MSG_GETBLKLIST msgGETBLKLIST = pccrrGETBLKLISTRequestPacket.MsgGetBLKLIST;
this.sid = msgGETBLKLIST.SegmentID;
this.VerifyGetBlkList(msgGETBLKLIST);
PccrrBothRoleCaptureCode.CaptureCommonDataTypesRequirements(msgGETBLKLIST);
_BLOCKRANGE[] blockRanges = ClientHelper.ConvertFromStackBLOCKRANGEArray(msgGETBLKLIST.NeededBlockRanges);
this.ReceiveMsgGetBlkList(blockRanges);
}
else
{
this.ReceiveMsgNegoReq();
}
}
}
/// <summary>
/// Decode response message.
/// </summary>
/// <param name="rawdata">The raw data.</param>
/// <returns>The PccrrPacket.</returns>
public PccrrPacket DecodeResponseMessage(byte[] rawdata)
{
if (rawdata == null)
{
throw new ArgumentNullException("rawdata");
}
if (rawdata.Length == 0)
{
throw new ArgumentException("The raw data should not be empty.");
}
int messageLength = 0;
messageLength = rawdata.Length;
PccrrPacket packet = null;
if (messageLength > 0)
{
int index = 0;
RESPONSE_MESSAGE ret = new RESPONSE_MESSAGE();
ret.TRANSPORTRESPONSEHEADER.Size = MarshalHelper.GetUInt32(rawdata, ref index, false);
ret.MESSAGEHEADER = this.DecodeMessageHeader(rawdata, ref index);
switch (ret.MESSAGEHEADER.MsgType)
{
case MsgType_Values.MSG_BLKLIST:
PccrrBLKLISTResponsePacket pccrrBLKLISTResponsePacket = new PccrrBLKLISTResponsePacket();
MSG_BLKLIST msgBLKLIST = this.DecodeMSG_BLKLIST(rawdata, ref index);
pccrrBLKLISTResponsePacket.TransportResponseHeader = ret.TRANSPORTRESPONSEHEADER;
pccrrBLKLISTResponsePacket.MsgBLKLIST = msgBLKLIST;
pccrrBLKLISTResponsePacket.MessageHeader = ret.MESSAGEHEADER;
packet = pccrrBLKLISTResponsePacket;
break;
case MsgType_Values.MSG_BLK:
PccrrBLKResponsePacket pccrrBLKResponsePacket = new PccrrBLKResponsePacket();
MSG_BLK msgBLK = this.DecodeMSG_BLK(rawdata, ref index);
pccrrBLKResponsePacket.TransportResponseHeader = ret.TRANSPORTRESPONSEHEADER;
pccrrBLKResponsePacket.MsgBLK = msgBLK;
pccrrBLKResponsePacket.MessageHeader = ret.MESSAGEHEADER;
packet = pccrrBLKResponsePacket;
break;
case MsgType_Values.MSG_NEGO_RESP:
PccrrNegoResponsePacket pccrrNegoResponsePacket = new PccrrNegoResponsePacket();
MSG_NEGO_RESP msgNEGORESP = this.DecodeMSG_NEGO_RESP(rawdata, ref index);
pccrrNegoResponsePacket.TransportResponseHeader = ret.TRANSPORTRESPONSEHEADER;
pccrrNegoResponsePacket.MsgNegoResp = msgNEGORESP;
pccrrNegoResponsePacket.MessageHeader = ret.MESSAGEHEADER;
packet = pccrrNegoResponsePacket;
break;
case MsgType_Values.MSG_SEGLIST:
PccrrSegListResponsePacket pccrrSegListResponsePacket = new PccrrSegListResponsePacket();
pccrrSegListResponsePacket.MsgSegList = TypeMarshal.ToStruct <MSG_SEGLIST>(rawdata, ref index);
pccrrSegListResponsePacket.TransportResponseHeader = ret.TRANSPORTRESPONSEHEADER;
pccrrSegListResponsePacket.MessageHeader = ret.MESSAGEHEADER;
packet = pccrrSegListResponsePacket;
break;
}
}
return(packet);
}
/// <summary>
/// Decode request message.
/// </summary>
/// <param name="rawdata">The raw data.</param>
/// <param name="uri">The request uri.</param>
/// <param name="method">The request method.</param>
/// <returns>The PccrrPacket.</returns>
public PccrrPacket DecodeRequestMessage(byte[] rawdata, Uri uri, HttpMethod method)
{
if (rawdata == null)
{
throw new ArgumentNullException("rawdata");
}
if (rawdata.Length == 0)
{
throw new ArgumentException("The rawdata should not be empty.");
}
int messageLength = 0;
messageLength = rawdata.Length;
PccrrPacket packet = null;
if (messageLength > 0)
{
int index = 0;
REQUEST_MESSAGE ret = new REQUEST_MESSAGE();
ret.MESSAGEHEADER = this.DecodeMessageHeader(rawdata, ref index);
switch (ret.MESSAGEHEADER.MsgType)
{
case MsgType_Values.MSG_NEGO_REQ:
PccrrNegoRequestPacket pccrrNegoRequestPacket = new PccrrNegoRequestPacket();
MSG_NEGO_REQ msgNEGOREQ = this.DecodeMSG_NEGO_REQ(rawdata, ref index);
pccrrNegoRequestPacket.MsgNegoReq = msgNEGOREQ;
pccrrNegoRequestPacket.MessageHeader = ret.MESSAGEHEADER;
pccrrNegoRequestPacket.Method = method;
pccrrNegoRequestPacket.Uri = uri;
packet = pccrrNegoRequestPacket;
break;
case MsgType_Values.MSG_GETBLKLIST:
PccrrGETBLKLISTRequestPacket pccrrGETBLKLISTRequestPacket = new PccrrGETBLKLISTRequestPacket();
MSG_GETBLKLIST msgGETBLKLIST = this.DecodeMSG_GETBLKLIST(rawdata, ref index);
pccrrGETBLKLISTRequestPacket.MsgGetBLKLIST = msgGETBLKLIST;
pccrrGETBLKLISTRequestPacket.MessageHeader = ret.MESSAGEHEADER;
pccrrGETBLKLISTRequestPacket.Method = method;
pccrrGETBLKLISTRequestPacket.Uri = uri;
packet = pccrrGETBLKLISTRequestPacket;
break;
case MsgType_Values.MSG_GETBLKS:
PccrrGETBLKSRequestPacket pccrrGETBLKSRequestPacket = new PccrrGETBLKSRequestPacket();
MSG_GETBLKS msgGETBLKS = this.DecodeMSG_GETBLKS(rawdata, ref index);
pccrrGETBLKSRequestPacket.MsgGetBLKS = msgGETBLKS;
pccrrGETBLKSRequestPacket.MessageHeader = ret.MESSAGEHEADER;
pccrrGETBLKSRequestPacket.Method = method;
pccrrGETBLKSRequestPacket.Uri = uri;
packet = pccrrGETBLKSRequestPacket;
break;
case MsgType_Values.MSG_GETSEGLIST:
PccrrGetSegListRequestPacket pccrrGetSegListRequestPacket = new PccrrGetSegListRequestPacket();
pccrrGetSegListRequestPacket.MsgGetSegList = TypeMarshal.ToStruct <MSG_GETSEGLIST>(rawdata, ref index);
pccrrGetSegListRequestPacket.MessageHeader = ret.MESSAGEHEADER;
pccrrGetSegListRequestPacket.Method = method;
pccrrGetSegListRequestPacket.Uri = uri;
packet = pccrrGetSegListRequestPacket;
break;
}
}
return(packet);
}
/// <summary>
/// The handle of MessageArrivedEventArgs happened.
/// </summary>
/// <param name="remoteAddr">Represents the remote endpoint address</param>
/// <param name="pccrrPacket">The received pccrrPacket, used to judge whether
/// it is a PccrrGETBLKLISTRequestPacket</param>
private void RetrievalTransport_Receive(IPEndPoint remoteAddr, PccrrPacket pccrrPacket)
{
if (pccrrPacket.PacketType == MsgType_Values.MSG_GETBLKLIST)
{
PccrrGETBLKLISTRequestPacket package = (PccrrGETBLKLISTRequestPacket)pccrrPacket;
int port = package.Uri.Port;
byte[] segmentID = package.MsgGetBLKLIST.SegmentID;
this.ReceivePccrrRequestHandler(this, new ReceivedPccrrRequestEventArg(port, segmentID));
}
else if (pccrrPacket.PacketType == MsgType_Values.MSG_GETBLKS)
{
PccrrGETBLKSRequestPacket package = (PccrrGETBLKSRequestPacket)pccrrPacket;
int port = package.Uri.Port;
byte[] segmentID = package.MsgGetBLKS.SegmentID;
this.ReceivePccrrRequestHandler(this, new ReceivedPccrrRequestEventArg(port, segmentID));
}
}
/// <summary>
/// Send a packet.
/// </summary>
/// <param name="packet">The packet need to be sent.</param>
/// <param name="timeout">The timeout.</param>
public void SendPacket(PccrrPacket packet, TimeSpan timeout)
{
if (packet == null)
{
throw new ArgumentNullException("packet");
}
if (timeout == null)
{
throw new ArgumentNullException("timeout");
}
if (this.httpClientTransport == null)
{
throw new InvalidOperationException("The transport is null for not connected.");
}
byte[] bytes = new byte[] { };
switch (packet.PacketType)
{
case MsgType_Values.MSG_NEGO_REQ:
bytes = ((PccrrNegoRequestPacket)packet).Encode();
break;
case MsgType_Values.MSG_GETBLKLIST:
bytes = ((PccrrGETBLKLISTRequestPacket)packet).Encode();
break;
case MsgType_Values.MSG_GETBLKS:
bytes = ((PccrrGETBLKSRequestPacket)packet).Encode();
break;
case MsgType_Values.MSG_GETSEGLIST:
bytes = ((PccrrGetSegListRequestPacket)packet).Encode();
break;
default:
throw new InvalidOperationException(
string.Format(
"The packet type {0} is not supported on client side.",
packet.PacketType));
}
try
{
this.httpClientTransport.Send(HttpVersion.Version11, null, bytes, CommonStack.HttpMethod.POST, (int)timeout.TotalMilliseconds);
}
catch (WebException ex)
{
if (this.logger != null)
{
this.logger.AddDebug(
string.Format(
"Unexpected exception send packet failed: {0}",
ex.Message));
}
}
catch (ObjectDisposedException ex)
{
if (this.logger != null)
{
this.logger.AddDebug(
string.Format(
"Unexpected exception send packet failed: {0}",
ex.Message));
}
}
}
void pccrrServer_MessageArrived(System.Net.IPEndPoint sender, PccrrPacket pccrrPacket)
{
var pccrrNegoRequest = pccrrPacket as PccrrNegoRequestPacket;
if (pccrrNegoRequest != null)
{
HandlePccrrNegoRequestPacket(pccrrNegoRequest);
goto logevent;
}
var pccrrGetBlkListRequest = pccrrPacket as PccrrGETBLKLISTRequestPacket;
if (pccrrGetBlkListRequest != null)
{
HandlePccrrGETBLKLISTRequestPacket(pccrrGetBlkListRequest);
goto logevent;
}
var pccrrGetBlkRequest = pccrrPacket as PccrrGETBLKSRequestPacket;
if (pccrrGetBlkRequest != null)
{
HandlePccrrGETBLKSRequestPacket(pccrrGetBlkRequest);
goto logevent;
}
var pccrrGetSegListRequest = pccrrPacket as PccrrGetSegListRequestPacket;
if (pccrrGetSegListRequest != null)
{
HandlePccrrGetSegListRequestPacket(pccrrGetSegListRequest);
goto logevent;
}
// Unknown packet
throw new NotImplementedException("Unknown PCCRR message type " + pccrrPacket.PacketType);
logevent:
eventQueue.LogEvent(typeof(PccrrServer).GetEvent("MessageArrived"), sender, pccrrPacket);
}
/// <summary>
/// Send a packet.
/// </summary>
/// <param name="packet">The packet need to be sent.</param>
public void SendPacket(PccrrPacket packet)
{
if (packet == null)
{
throw new ArgumentNullException("packet");
}
if (this.httpServerTransport == null)
{
throw new InvalidOperationException("The transport is null for not connected.");
}
byte[] bytes = new byte[] { };
switch (packet.PacketType)
{
case MsgType_Values.MSG_NEGO_RESP:
bytes = ((PccrrNegoResponsePacket)packet).Encode();
break;
case MsgType_Values.MSG_BLKLIST:
bytes = ((PccrrBLKLISTResponsePacket)packet).Encode();
break;
case MsgType_Values.MSG_BLK:
bytes = ((PccrrBLKResponsePacket)packet).Encode();
break;
}
//try
//{
this.httpServerTransport.Send(null, bytes, this.httpListenerContext);
//}
//catch (HttpListenerException ex)
//{
// if (this.logger != null)
// {
// this.logger.AddDebug(
// string.Format(
// "Unexpected exception send packet failed: {0}",
// ex.Message));
// }
// throw;
//}
}
/// <summary>
/// Send a packet.
/// </summary>
/// <param name="packet">The packet need to be sent.</param>
/// <param name="timeout">The timeout.</param>
public void SendPacket(PccrrPacket packet, TimeSpan timeout)
{
if (packet == null)
{
throw new ArgumentNullException("packet");
}
if (timeout == null)
{
throw new ArgumentNullException("timeout");
}
if (this.httpClientTransport == null)
{
throw new InvalidOperationException("The transport is null for not connected.");
}
byte[] bytes = new byte[] { };
switch (packet.PacketType)
{
case MsgType_Values.MSG_NEGO_REQ:
bytes = ((PccrrNegoRequestPacket)packet).Encode();
break;
case MsgType_Values.MSG_GETBLKLIST:
bytes = ((PccrrGETBLKLISTRequestPacket)packet).Encode();
break;
case MsgType_Values.MSG_GETBLKS:
bytes = ((PccrrGETBLKSRequestPacket)packet).Encode();
break;
case MsgType_Values.MSG_GETSEGLIST:
bytes = ((PccrrGetSegListRequestPacket)packet).Encode();
break;
default:
throw new InvalidOperationException(
string.Format(
"The packet type {0} is not supported on client side.",
packet.PacketType));
}
try
{
this.httpClientTransport.Send(HttpVersion.Version11, null, bytes, CommonStack.HttpMethod.POST, (int)timeout.TotalMilliseconds);
}
catch (WebException ex)
{
if (this.logger != null)
{
this.logger.AddDebug(
string.Format(
"Unexpected exception send packet failed: {0}",
ex.Message));
}
}
catch (ObjectDisposedException ex)
{
if (this.logger != null)
{
this.logger.AddDebug(
string.Format(
"Unexpected exception send packet failed: {0}",
ex.Message));
}
}
}
