private static byte[] CreateResponseArray(RpcBindResponse response)
{
using MemoryStream stream = new MemoryStream();
using BinaryWriter binaryWriter = new BinaryWriter(stream);
binaryWriter.Write(response.Version);
binaryWriter.Write(response.VersionMinor);
binaryWriter.Write(response.PacketType);
binaryWriter.Write(response.PacketFlags);
binaryWriter.Write(response.DataRepresentation);
binaryWriter.Write(response.FragLength);
binaryWriter.Write(response.AuthLength);
binaryWriter.Write(response.CallId);
binaryWriter.Write(response.MaxXmitFrag);
binaryWriter.Write(response.MaxRecvFrag);
binaryWriter.Write(response.AssocGroup);
binaryWriter.Write(response.SecondaryAddressLength);
binaryWriter.Write(response.SecondaryAddress);
//binaryWriter.Write((byte)0x00);
int padBytes = -(2 + response.SecondaryAddress.Length) & 0x3;
binaryWriter.Write(new byte[padBytes]); // array initialized to 0x00 by default
binaryWriter.Write(response.NumberOfResults);
foreach (CtxItem item in response.CtxItems)
{
binaryWriter.Write(item.AckResult);
binaryWriter.Write(item.AckReason);
binaryWriter.Write(item.TransferSyntax);
binaryWriter.Write(item.SyntaxVersion);
}
binaryWriter.Flush();
stream.Position = 0;
return(stream.ToArray());
}
public byte[] HandleRequest(byte[] b)
{
RpcBindRequest request = CreateRequest(b);
RpcBindResponse response = CreateResponse(request);
byte[] responseBytes = CreateResponseArray(response);
return(responseBytes);
}
private RpcBindResponse CreateResponse(RpcBindRequest request)
{
RpcBindResponse response = new RpcBindResponse {
Version = request.Version, VersionMinor = request.VersionMinor, PacketType = 0x0c, PacketFlags = 0x13, DataRepresentation = request.DataRepresentation, FragLength = 36 + 3 * 24, AuthLength = request.AuthLength, CallId = request.CallId, MaxXmitFrag = request.MaxXmitFrag, MaxRecvFrag = request.MaxRecvFrag, AssocGroup = 0x1063bf3f
};
byte[] secondaryAddress = Encoding.ASCII.GetBytes(_settings.Port + "\0");
response.SecondaryAddressLength = (ushort)secondaryAddress.Length;
response.SecondaryAddress = secondaryAddress;
response.NumberOfResults = 3;
response.CtxItems = new CtxItem[3];
response.CtxItems[0] = new CtxItem {
AckResult = 0, AckReason = 0, TransferSyntax = new byte[] { 0x04, 0x5d, 0x88, 0x8a, 0xeb, 0x1c, 0xc9, 0x11, 0x9f, 0xe8, 0x08, 0x00, 0x2b, 0x10, 0x48, 0x60 }, SyntaxVersion = 2
};
response.CtxItems[1] = new CtxItem {
AckResult = 2, AckReason = 2, TransferSyntax = new byte[16], SyntaxVersion = 0
};
response.CtxItems[2] = new CtxItem {
AckResult = 3, AckReason = 3, TransferSyntax = new byte[16], SyntaxVersion = 0
};
return(response);
}