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// This code is derived from jcifs smb client library <jcifs at samba dot org>
// Ported by J. Arturo <webmaster at komodosoft dot net>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
using SharpCifs.Dcerpc.Ndr;
namespace SharpCifs.Dcerpc
{
public abstract class DcerpcMessage : NdrObject
{
protected internal int Ptype = -1;
protected internal int Flags;
protected internal int Length;
protected internal int CallId;
protected internal int AllocHint;
protected internal int Result;
public virtual bool IsFlagSet(int flag)
{
return (Flags & flag) == flag;
}
public virtual void UnsetFlag(int flag)
{
Flags &= ~flag;
}
public virtual void SetFlag(int flag)
{
Flags |= flag;
}
public virtual DcerpcException GetResult()
{
if (Result != 0)
{
return new DcerpcException(Result);
}
return null;
}
internal virtual void Encode_header(NdrBuffer buf)
{
buf.Enc_ndr_small(5);
buf.Enc_ndr_small(0);
buf.Enc_ndr_small(Ptype);
buf.Enc_ndr_small(Flags);
buf.Enc_ndr_long(unchecked(0x00000010));
buf.Enc_ndr_short(Length);
buf.Enc_ndr_short(0);
buf.Enc_ndr_long(CallId);
}
/// <exception cref="SharpCifs.Dcerpc.Ndr.NdrException"></exception>
internal virtual void Decode_header(NdrBuffer buf)
{
if (buf.Dec_ndr_small() != 5 || buf.Dec_ndr_small() != 0)
{
throw new NdrException("DCERPC version not supported");
}
Ptype = buf.Dec_ndr_small();
Flags = buf.Dec_ndr_small();
if (buf.Dec_ndr_long() != unchecked(0x00000010))
{
throw new NdrException("Data representation not supported");
}
Length = buf.Dec_ndr_short();
if (buf.Dec_ndr_short() != 0)
{
throw new NdrException("DCERPC authentication not supported");
}
CallId = buf.Dec_ndr_long();
}
/// <exception cref="SharpCifs.Dcerpc.Ndr.NdrException"></exception>
public override void Encode(NdrBuffer buf)
{
int start = buf.GetIndex();
int allocHintIndex = 0;
buf.Advance(16);
if (Ptype == 0)
{
allocHintIndex = buf.GetIndex();
buf.Enc_ndr_long(0);
buf.Enc_ndr_short(0);
buf.Enc_ndr_short(GetOpnum());
}
Encode_in(buf);
Length = buf.GetIndex() - start;
if (Ptype == 0)
{
buf.SetIndex(allocHintIndex);
AllocHint = Length - allocHintIndex;
buf.Enc_ndr_long(AllocHint);
}
buf.SetIndex(start);
Encode_header(buf);
buf.SetIndex(start + Length);
}
/// <exception cref="SharpCifs.Dcerpc.Ndr.NdrException"></exception>
public override void Decode(NdrBuffer buf)
{
Decode_header(buf);
if (Ptype != 12 && Ptype != 2 && Ptype != 3 && Ptype != 13)
{
throw new NdrException("Unexpected ptype: " + Ptype);
}
if (Ptype == 2 || Ptype == 3)
{
AllocHint = buf.Dec_ndr_long();
buf.Dec_ndr_short();
buf.Dec_ndr_short();
}
if (Ptype == 3 || Ptype == 13)
{
Result = buf.Dec_ndr_long();
}
else
{
Decode_out(buf);
}
}
public abstract int GetOpnum();
/// <exception cref="SharpCifs.Dcerpc.Ndr.NdrException"></exception>
public abstract void Encode_in(NdrBuffer dst);
/// <exception cref="SharpCifs.Dcerpc.Ndr.NdrException"></exception>
public abstract void Decode_out(NdrBuffer src);
}
}
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