/// <summary>
/// Un-marshal a byte array to PDU struct.
/// </summary>
/// <param name="binaryReader">A binary reader.</param>
internal override void FromBytes(BinaryReader binaryReader)
{
rpc_vers = binaryReader.ReadByte();
rpc_vers_minor = binaryReader.ReadByte();
PTYPE = (RpcePacketType)binaryReader.ReadByte();
pfc_flags = (RpceCoPfcFlags)binaryReader.ReadByte();
packed_drep = new DataRepresentationFormatLabel();
packed_drep.dataRepFormat = (RpceDataRepresentationFormat)binaryReader.ReadUInt16();
packed_drep.reserved = binaryReader.ReadUInt16();
frag_length = binaryReader.ReadUInt16();
auth_length = binaryReader.ReadUInt16();
call_id = binaryReader.ReadUInt32();
}
/// <summary>
/// Un-marshal a byte array to PDU struct.
/// </summary>
/// <param name="binaryReader">A binary reader.</param>
internal override void FromBytes(BinaryReader binaryReader)
{
rpc_vers = binaryReader.ReadByte();
rpc_vers_minor = binaryReader.ReadByte();
PTYPE = (RpcePacketType)binaryReader.ReadByte();
pfc_flags = (RpceCoPfcFlags)binaryReader.ReadByte();
packed_drep = new DataRepresentationFormatLabel();
packed_drep.dataRepFormat = (RpceDataRepresentationFormat)binaryReader.ReadUInt16();
packed_drep.reserved = binaryReader.ReadUInt16();
frag_length = binaryReader.ReadUInt16();
auth_length = binaryReader.ReadUInt16();
call_id = binaryReader.ReadUInt32();
if (packed_drep.dataRepFormat != RpceDataRepresentationFormat.IEEE_LittleEndian_ASCII)
{
frag_length = EndianUtility.ReverseByteOrder(frag_length);
auth_length = EndianUtility.ReverseByteOrder(auth_length);
call_id = EndianUtility.ReverseByteOrder(call_id);
}
}
/// <summary>
/// Generate PFC_*** based on context and package type.
/// </summary>
/// <param name="context">Context of the session.</param>
/// <param name="packageType">package type.</param>
/// <returns>RFC_*** flag.</returns>
internal static RpceCoPfcFlags GeneratePfcFlags(RpceContext context, RpcePacketType packageType)
{
RpceServerSessionContext sessionContext = context as RpceServerSessionContext;
RpceCoPfcFlags flags = RpceCoPfcFlags.PFC_FIRST_FRAG | RpceCoPfcFlags.PFC_LAST_FRAG;
if (sessionContext == null) //client-side
{
if (context.SupportsConcurrentMultiplexing)
{
flags |= RpceCoPfcFlags.PFC_CONC_MPX;
}
}
else if ( //server-side
(packageType == RpcePacketType.BindAck &&
sessionContext.ServerContext.SupportsConcurrentMultiplexing) || // first response, read server context
sessionContext.SupportsConcurrentMultiplexing) // if it's not first response, we can read session context
{
flags |= RpceCoPfcFlags.PFC_CONC_MPX;
}
if ((packageType == RpcePacketType.Bind ||
packageType == RpcePacketType.BindAck ||
packageType == RpcePacketType.AlterContext ||
packageType == RpcePacketType.AlterContextResp)
&&
context.SupportsHeaderSign)
{
if (sessionContext == null || //client-side
sessionContext.ServerContext.SupportsHeaderSign) //server-side
{
flags |= RpceCoPfcFlags.PFC_SUPPORT_HEADER_SIGN;
}
}
return(flags);
}
/// <summary>
/// Un-marshal a byte array to PDU struct.
/// </summary>
/// <param name="binaryReader">A binary reader.</param>
internal override void FromBytes(BinaryReader binaryReader)
{
rpc_vers = binaryReader.ReadByte();
rpc_vers_minor = binaryReader.ReadByte();
PTYPE = (RpcePacketType)binaryReader.ReadByte();
pfc_flags = (RpceCoPfcFlags)binaryReader.ReadByte();
packed_drep = new DataRepresentationFormatLabel();
packed_drep.dataRepFormat = (RpceDataRepresentationFormat)binaryReader.ReadUInt16();
packed_drep.reserved = binaryReader.ReadUInt16();
frag_length = binaryReader.ReadUInt16();
auth_length = binaryReader.ReadUInt16();
call_id = binaryReader.ReadUInt32();
}
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 an RpceCoBindPdu.
/// </summary>
/// <param name="rpcVersionMinor">
/// RPC version minor.
/// </param>
/// <param name="pfcFlags">
/// PFC_*** flags.
/// </param>
/// <param name="callId">
/// Call Id.
/// </param>
/// <param name="maxTransmitFragmentSize">
/// Max transmit fragment size, in bytes.
/// </param>
/// <param name="maxReceiveFragmentSize">
/// Max receive fragment size, in bytes.
/// </param>
/// <param name="associateGroupId">
/// Associated group id.
/// </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="ndrVersion">
/// NDR version to be used to marshal/un-marshal stub.
/// </param>
/// <param name="bindTimeFeatureNegotiationBitmask">
/// BindTimeFeatureNegotiationBitmask to sent.
/// Set the value to null if client donot support the feature.
/// </param>
/// <returns>
/// Created RpceCoBindPdu, it's ok to be sent out if there's
/// no modification to any field of the PDU.
/// </returns>
public RpceCoBindPdu CreateCoBindPdu(
byte rpcVersionMinor,
RpceCoPfcFlags pfcFlags,
uint callId,
ushort maxTransmitFragmentSize,
ushort maxReceiveFragmentSize,
uint associateGroupId,
Guid interfaceId,
ushort interfaceMajorVersion,
ushort interfaceMinorVersion,
RpceNdrVersion ndrVersion,
RpceBindTimeFeatureNegotiationBitmask? bindTimeFeatureNegotiationBitmask)
{
RpceCoBindPdu bindPdu = new RpceCoBindPdu(context);
bindPdu.rpc_vers = 5;
bindPdu.rpc_vers_minor = rpcVersionMinor;
bindPdu.PTYPE = RpcePacketType.Bind;
bindPdu.pfc_flags = pfcFlags
| RpceCoPfcFlags.PFC_FIRST_FRAG
| RpceCoPfcFlags.PFC_LAST_FRAG;
bindPdu.packed_drep.dataRepFormat = RpceDataRepresentationFormat.IEEE_LittleEndian_ASCII;
bindPdu.packed_drep.reserved = 0;
bindPdu.call_id = callId;
bindPdu.max_xmit_frag = maxTransmitFragmentSize;
bindPdu.max_recv_frag = maxReceiveFragmentSize;
bindPdu.assoc_group_id = associateGroupId;
List<p_cont_elem_t> p_cont_elem_list = new List<p_cont_elem_t>();
if ((ndrVersion & RpceNdrVersion.NDR) == RpceNdrVersion.NDR)
{
p_cont_elem_t p_cont_elem;
p_cont_elem.p_cont_id = (ushort)(p_cont_elem_list.Count);
p_cont_elem.n_transfer_syn = 1;
p_cont_elem.reserved = 0;
p_cont_elem.abstract_syntax.if_uuid = interfaceId;
p_cont_elem.abstract_syntax.if_vers_major = interfaceMajorVersion;
p_cont_elem.abstract_syntax.if_vers_minor = interfaceMinorVersion;
p_cont_elem.transfer_syntaxes = new p_syntax_id_t[1];
p_cont_elem.transfer_syntaxes[0].if_uuid
= RpceUtility.NDR_INTERFACE_UUID;
p_cont_elem.transfer_syntaxes[0].if_vers_major
= RpceUtility.NDR_INTERFACE_MAJOR_VERSION;
p_cont_elem.transfer_syntaxes[0].if_vers_minor
= RpceUtility.NDR_INTERFACE_MINOR_VERSION;
p_cont_elem_list.Add(p_cont_elem);
}
if ((ndrVersion & RpceNdrVersion.NDR64) == RpceNdrVersion.NDR64)
{
p_cont_elem_t p_cont_elem;
p_cont_elem.p_cont_id = (ushort)(p_cont_elem_list.Count);
p_cont_elem.n_transfer_syn = 1;
p_cont_elem.reserved = 0;
p_cont_elem.abstract_syntax.if_uuid = interfaceId;
p_cont_elem.abstract_syntax.if_vers_major = interfaceMajorVersion;
p_cont_elem.abstract_syntax.if_vers_minor = interfaceMinorVersion;
p_cont_elem.transfer_syntaxes = new p_syntax_id_t[1];
p_cont_elem.transfer_syntaxes[0].if_uuid
= RpceUtility.NDR64_INTERFACE_UUID;
p_cont_elem.transfer_syntaxes[0].if_vers_major
= RpceUtility.NDR64_INTERFACE_MAJOR_VERSION;
p_cont_elem.transfer_syntaxes[0].if_vers_minor
= RpceUtility.NDR64_INTERFACE_MINOR_VERSION;
p_cont_elem_list.Add(p_cont_elem);
}
if (bindTimeFeatureNegotiationBitmask != null)
{
p_cont_elem_t p_cont_elem;
p_cont_elem.p_cont_id = (ushort)(p_cont_elem_list.Count);
p_cont_elem.n_transfer_syn = 1;
p_cont_elem.reserved = 0;
p_cont_elem.abstract_syntax.if_uuid = interfaceId;
p_cont_elem.abstract_syntax.if_vers_major = interfaceMajorVersion;
p_cont_elem.abstract_syntax.if_vers_minor = interfaceMinorVersion;
p_cont_elem.transfer_syntaxes = new p_syntax_id_t[1];
byte[] guidBytes = new byte[RpceUtility.GUID_SIZE]; // length of a Guid
Buffer.BlockCopy(
RpceUtility.BIND_TIME_FEATURE_NEGOTIATION_BITMASK_GUID_BYTES,
0,
guidBytes,
0,
RpceUtility.GUID_SIZE);
guidBytes[RpceUtility.BIND_TIME_FEATURE_NEGOTIATION_BITMASK_PREFIX_LENGTH]
= (byte)bindTimeFeatureNegotiationBitmask.Value;
p_cont_elem.transfer_syntaxes[0].if_uuid = new Guid(guidBytes);
p_cont_elem.transfer_syntaxes[0].if_vers_major = 1;
p_cont_elem.transfer_syntaxes[0].if_vers_minor = 0;
p_cont_elem_list.Add(p_cont_elem);
}
bindPdu.p_context_elem.n_context_elem = (byte)p_cont_elem_list.Count;
bindPdu.p_context_elem.reserved = 0;
bindPdu.p_context_elem.reserved2 = 0;
bindPdu.p_context_elem.p_cont_elem = p_cont_elem_list.ToArray();
bindPdu.AppendAuthenticationVerifier();
bindPdu.SetLength();
return bindPdu;
}