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