/// <summary>
/// Calling this method to be notified when a new RPC connection is coming.
/// </summary>
/// <param name="ifMatchFunc">Matching function.</param>
/// <param name="timeout">Timeout of expecting a connection.</param>
/// <param name="sessionContext">The sessionContext of binded connection.</param>
/// <returns>If bind succeeded, return true; otherwise, false.</returns>
private bool InternalExpectBind(
RpcIfMatchFunc ifMatchFunc,
TimeSpan timeout,
ref RpceServerSessionContext sessionContext)
{
RpcePdu receivedPdu = ReceiveAndReassemblePdu(timeout, ref sessionContext);
RpceCoBindPdu bindPdu = receivedPdu as RpceCoBindPdu;
if (bindPdu == null)
{
throw new InvalidOperationException("Expect bind_pdu, but received others.");
}
RpcIf rpcIf = new RpcIf(sessionContext.InterfaceId, sessionContext.InterfaceMajorVersion, sessionContext.InterfaceMinorVersion);
if (!ifMatchFunc(rpcIf))
{
// Interface doesn't match, response BindNak
RpceCoBindNakPdu bindNakPdu =
rpceServer.CreateCoBindNakPdu(sessionContext, p_reject_reason_t.REASON_NOT_SPECIFIED, null);
FragmentAndSendPdu(sessionContext, bindNakPdu);
return(false);
}
RpceCoBindAckPdu bindAckPdu = rpceServer.CreateCoBindAckPdu(sessionContext);
FragmentAndSendPdu(sessionContext, bindAckPdu);
while (sessionContext.SecurityContext != null && sessionContext.SecurityContextNeedContinueProcessing)
{
receivedPdu = ReceiveAndReassemblePdu(timeout, ref sessionContext);
RpceCoAlterContextPdu alterContextPdu = receivedPdu as RpceCoAlterContextPdu;
RpceCoAuth3Pdu auth3Pdu = receivedPdu as RpceCoAuth3Pdu;
if (alterContextPdu != null)
{
RpceCoAlterContextRespPdu alterContextRespPdu =
rpceServer.CreateCoAlterContextRespPdu(sessionContext);
FragmentAndSendPdu(sessionContext, alterContextRespPdu);
}
else if (auth3Pdu != null)
{
//Do nothing
}
}
return(true);
}
/// <summary>
/// Connect and bind to a RPCE remote host.
/// </summary>
/// <param name="protocolSequence">
/// A protocol sequence.<para/>
/// Support ncacn_ip_tcp and ncacn_np only.
/// </param>
/// <param name="networkAddress">
/// A network address of RPCE remote host.
/// </param>
/// <param name="endpoint">
/// An endpoint that its format and content
/// are associated with the protocol sequence.
/// </param>
/// <param name="transportCredential">
/// If connect by SMB/SMB2, it's the security credential
/// used by underlayer transport (SMB/SMB2).
/// If connect by TCP, this parameter is ignored.
/// </param>
/// <param name="interfaceId">
/// A Guid of interface_id that is binding to.
/// </param>
/// <param name="interfaceMajorVersion">
/// interface_major_ver that is binding to.
/// </param>
/// <param name="interfaceMinorVersion">
/// interface_minor_ver that is binding to.
/// </param>
/// <param name="securityContext">
/// A security provider. If setting to null, indicate the default authentication type NTLM is selected.
/// </param>
/// <param name="connectSecurityContext">
/// A security provider for connect authentication. If setting to null, indicate the default authentication type NTLM is selected.
/// </param>
/// <param name="authenticationLevel">
/// An authentication level.
/// </param>
/// <param name="supportsHeaderSign">
/// Indicates whether client supports header sign or not.
/// </param>
/// <param name="timeout">
/// Timeout period.
/// </param>
/// <exception cref="ArgumentNullException">
/// Thrown when protSeq, networkAddr or endpoint is null.
/// </exception>
/// <exception cref="InvalidOperationException">
/// Thrown when receive error from server.
/// </exception>
public virtual void Bind(
string protocolSequence,
string networkAddress,
string endpoint,
AccountCredential transportCredential,
Guid interfaceId,
ushort interfaceMajorVersion,
ushort interfaceMinorVersion,
ClientSecurityContext securityContext,
ClientSecurityContext connectSecurityContext,
RpceAuthenticationLevel authenticationLevel,
bool supportsHeaderSign,
TimeSpan timeout)
{
if (protocolSequence == null)
{
throw new ArgumentNullException("protocolSequence");
}
if (networkAddress == null)
{
throw new ArgumentNullException("networkAddress");
}
if (endpoint == null)
{
throw new ArgumentNullException("endpoint");
}
// RPC over named-pipe does not support asynchronous call in this library.
// http://msdn.microsoft.com/en-us/library/windows/desktop/aa373551(v=vs.85).aspx
rpceClient.Context.IsAsynchronous = (string.Compare(protocolSequence, RpceUtility.RPC_OVER_NAMED_PIPE_PROTOCOL_SEQUENCE, true) != 0);
rpceClient.Connect(protocolSequence, networkAddress, endpoint, transportCredential, timeout,
connectSecurityContext == null ? SecurityPackageType.Ntlm : connectSecurityContext.PackageType);
rpceClient.SetAuthInfo(securityContext, authenticationLevel, rpceClient.Context.AuthenticationContextId);
RpceCoBindPdu bindPdu = rpceClient.CreateCoBindPdu(
//read from context, donot hardcode.
rpceClient.Context.RpcVersionMinor, // default is rpc vers 5.0
supportsHeaderSign ? RpceCoPfcFlags.PFC_SUPPORT_HEADER_SIGN : RpceCoPfcFlags.None,
rpceClient.ComputeNextCallId(), // call id, default is 1
rpceClient.Context.MaxTransmitFragmentSize, // max xmit frag
rpceClient.Context.MaxReceiveFragmentSize, // max recv frag
rpceClient.Context.AssociateGroupId, // assoc group id, default 0
interfaceId,
interfaceMajorVersion,
interfaceMinorVersion,
rpceClient.Context.NdrVersion, // default is NDR
(rpceClient.Context.BindTimeFeatureNegotiationBitmask != RpceBindTimeFeatureNegotiationBitmask.None) // default is None
? (RpceBindTimeFeatureNegotiationBitmask?)rpceClient.Context.BindTimeFeatureNegotiationBitmask
: null);
FragmentAndSendPdu(bindPdu);
RpcePdu receivedPdu = ReceiveAndReassemblePdu(timeout);
if (receivedPdu is RpceCoBindAckPdu)
{
if (rpceClient.Context.NdrVersion == RpceNdrVersion.None)
{
throw new InvalidOperationException("Neither NDR nor NDR64 is supported.");
}
}
else
{
RpceCoBindNakPdu bindNakPdu = receivedPdu as RpceCoBindNakPdu;
if (bindNakPdu != null)
{
throw new InvalidOperationException(bindNakPdu.provider_reject_reason.ToString());
}
else
{
throw new InvalidOperationException(
string.Format("Unexpected packet type received - {0}.",
receivedPdu.GetType().Name));
}
}
while (rpceClient.Context.SecurityContext != null &&
rpceClient.Context.SecurityContext.NeedContinueProcessing)
{
RpceCoAlterContextPdu alterContextPdu = rpceClient.CreateCoAlterContextPdu();
FragmentAndSendPdu(alterContextPdu);
receivedPdu = ReceiveAndReassemblePdu(timeout);
RpceCoFaultPdu faultPdu = receivedPdu as RpceCoFaultPdu;
if (faultPdu != null)
{
throw new InvalidOperationException(faultPdu.status.ToString());
}
if (!(receivedPdu is RpceCoAlterContextRespPdu))
{
throw new InvalidOperationException("Expect alter_context_pdu, but received others.");
}
}
if (rpceClient.Context.SecurityContext != null &&
rpceClient.Context.SecurityContext.Token != null &&
rpceClient.Context.SecurityContext.Token.Length != 0)
{
RpceCoAuth3Pdu auth3Pdu = rpceClient.CreateCoAuth3Pdu();
FragmentAndSendPdu(auth3Pdu);
// no expected response from server
rpceClient.Context.OutstandingCalls.Remove(auth3Pdu.call_id);
}
if (rpceClient.Context.IsAsynchronous)
{
// Start the receiving thread to receive the response from server.
cancellationToken = new CancellationTokenSource();
receiveTask = new Task(EventLoop, cancellationToken.Token); //new Thread(new ThreadStart(EventLoop));
//receiveThread.IsBackground = true;
receiveTask.Start();
}
}
public static RpceCoPdu DecodeCoPdu(
RpceContext context,
byte[] pduBytes)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
if (pduBytes == null)
{
throw new ArgumentNullException("pduBytes");
}
RpceCoPdu pdu;
//#2 byte is PTYPE
RpcePacketType packageType = (RpcePacketType)pduBytes[2];
//#3 byte is PFC_*** flags
RpceCoPfcFlags pfcFlags = (RpceCoPfcFlags)pduBytes[3];
RpceCoPfcFlags pfcFlagsNoFragment = RpceCoPfcFlags.PFC_FIRST_FRAG | RpceCoPfcFlags.PFC_LAST_FRAG;
if (((pfcFlags & pfcFlagsNoFragment) != pfcFlagsNoFragment) &&
(packageType == RpcePacketType.Bind ||
packageType == RpcePacketType.BindAck ||
packageType == RpcePacketType.AlterContext ||
packageType == RpcePacketType.AlterContextResp ||
packageType == RpcePacketType.Auth3))
{
//If it's a fragment and PTYPE is bind/bind_ack/alter_context/alter_context_resp
//Windows RPC support version 5.0 only.
//Bind fragment requires RPC ver 5.1.
//We don't support it.
throw new NotSupportedException("bind/bind_ack/alt_context/alt_context_resp/auth3 PDU fragment are not supported.");
}
else
{
switch (packageType)
{
case RpcePacketType.Bind:
pdu = new RpceCoBindPdu(context, pduBytes);
break;
case RpcePacketType.BindAck:
pdu = new RpceCoBindAckPdu(context, pduBytes);
break;
case RpcePacketType.BindNak:
pdu = new RpceCoBindNakPdu(context, pduBytes);
break;
case RpcePacketType.AlterContext:
pdu = new RpceCoAlterContextPdu(context, pduBytes);
break;
case RpcePacketType.AlterContextResp:
pdu = new RpceCoAlterContextRespPdu(context, pduBytes);
break;
case RpcePacketType.Auth3:
pdu = new RpceCoAuth3Pdu(context, pduBytes);
break;
case RpcePacketType.Request:
pdu = new RpceCoRequestPdu(context, pduBytes);
break;
case RpcePacketType.Response:
pdu = new RpceCoResponsePdu(context, pduBytes);
break;
case RpcePacketType.Fault:
pdu = new RpceCoFaultPdu(context, pduBytes);
break;
case RpcePacketType.CoCancel:
pdu = new RpceCoCancelPdu(context, pduBytes);
break;
case RpcePacketType.Orphaned:
pdu = new RpceCoOrphanedPdu(context, pduBytes);
break;
case RpcePacketType.Shutdown:
pdu = new RpceCoShutdownPdu(context, pduBytes);
break;
default:
throw new InvalidOperationException(
string.Format("Receive invalid packet - {0}.", packageType));
}
}
return(pdu);
}
/// <summary>
/// Create a RpceCoAuth3Pdu.
/// </summary>
/// <returns>
/// Created RpceCoAuth3Pdu, it's ok to be sent out if there's
/// no modification to any field of the PDU.
/// </returns>
public RpceCoAuth3Pdu CreateCoAuth3Pdu()
{
RpceCoAuth3Pdu auth3Pdu = new RpceCoAuth3Pdu(context);
auth3Pdu.rpc_vers = context.RpcVersionMajor;
auth3Pdu.rpc_vers_minor = context.RpcVersionMinor;
auth3Pdu.PTYPE = RpcePacketType.Auth3;
auth3Pdu.pfc_flags = RpceUtility.GeneratePfcFlags(context, RpcePacketType.Auth3);
auth3Pdu.packed_drep.dataRepFormat = context.PackedDataRepresentationFormat;
auth3Pdu.packed_drep.reserved = 0;
auth3Pdu.call_id = ComputeNextCallId();
auth3Pdu.pad = 0;
auth3Pdu.AppendAuthenticationVerifier();
auth3Pdu.SetLength();
return auth3Pdu;
}
