DCE/RPC: Add DCOM support

[gpotter2]

• Add DCOM support: a DCOM_Client class that can instanciate classes, request interfaces, release them, call methods, etc.
• Fix various issues with the DCE/RPC client, most notably improvements to the the handling of bindings contexts and better handling of errors in requests
• Add vt context verifier (like Windows does) to increase security of a DCE/RPC bind
• Rewrite NDR recursive fields
• add more typing and docstrings to the DCERPC_Client
• documentation

[Copilot]

Pull Request Overview

This PR adds comprehensive DCOM (Distributed Component Object Model) support to Scapy's DCE/RPC implementation. The main purpose is to enable Scapy to handle COM object instantiation, interface management, and remote method calls over DCE/RPC.

Key changes include:

• Implementation of a new DCOM_Client class with full object lifecycle management capabilities
• Enhanced DCE/RPC client with improved binding contexts, error handling, and security verification
• Extension of NDR field types and recursive field handling for complex DCOM structures

Reviewed Changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
scapy/packet.py	Error message fix for field building operation
scapy/layers/smb2.py	Addition of new SMB2 status codes for DCOM compatibility
scapy/layers/ntlm.py	Removal of duplicate error handling code
scapy/layers/msrpce/rpcserver.py	Import reorganization and typing improvements
scapy/layers/msrpce/rpcclient.py	Major enhancements to DCE/RPC client with security verification
scapy/layers/msrpce/raw/ms_dcom.py	Complete DCOM interface definitions and packet structures
scapy/layers/msrpce/mseerr.py	Error handling fix for extended error information
scapy/layers/msrpce/msdcom.py	New comprehensive DCOM client implementation
scapy/layers/msrpce/ept.py	Protocol identifier enum consolidation
scapy/layers/dcerpc.py	Core DCE/RPC improvements including COM interface support
scapy/fields.py	UTF-16 string length calculation fix
scapy/config.py	Addition of NDR64 configuration option
doc/scapy/layers/dcom.rst	New documentation for DCOM functionality

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[codecov]

Codecov Report

❌ Patch coverage is 52.11679% with 328 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.21%. Comparing base (cc8e091) to head (b8b5202).
⚠️ Report is 5 commits behind head on master.

Files with missing lines	Patch %	Lines
scapy/layers/msrpce/msdcom.py	21.68%	260 Missing ⚠️
scapy/layers/msrpce/rpcclient.py	61.17%	33 Missing ⚠️
scapy/layers/dcerpc.py	77.53%	31 Missing ⚠️
scapy/layers/msrpce/mspac.py	90.00%	1 Missing ⚠️
scapy/layers/msrpce/rpcserver.py	90.00%	1 Missing ⚠️
scapy/layers/smbclient.py	50.00%	1 Missing ⚠️
scapy/modules/ticketer.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4815      +/-   ##
==========================================
- Coverage   80.99%   80.21%   -0.78%     
==========================================
  Files         365      348      -17     
  Lines       89112    89348     +236     
==========================================
- Hits        72173    71672     -501     
- Misses      16939    17676     +737     

Files with missing lines	Coverage Δ
scapy/config.py	78.90% <100.00%> (-0.76%)	⬇️
scapy/layers/msrpce/ept.py	52.38% <ø> (-1.11%)	⬇️
scapy/layers/msrpce/mseerr.py	100.00% <100.00%> (ø)
scapy/layers/msrpce/raw/ms_dcom.py	100.00% <100.00%> (ø)
scapy/layers/msrpce/raw/ms_eerr.py	100.00% <100.00%> (ø)
scapy/layers/ntlm.py	81.88% <ø> (+0.45%)	⬆️
scapy/layers/smb2.py	88.48% <ø> (-0.02%)	⬇️
scapy/modules/ldaphero.py	0.00% <ø> (ø)
scapy/packet.py	84.54% <ø> (-0.02%)	⬇️
scapy/layers/msrpce/mspac.py	90.74% <90.00%> (+0.97%)	⬆️
... and 6 more

... and 266 files with indirect coverage changes

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