ace-bbmd-manager 0.3.1

CLI tool for managing BACnet BBMD Broadcast Distribution Tables with audit logging and rollback

BBMD Manager

A CLI tool for managing BACnet BBMD (BACnet Broadcast Management Device) Broadcast Distribution Tables with full audit logging and rollback capability.

Features

• Network Discovery: Walk BBMD networks to discover topology
• BDT Management: Read and write Broadcast Distribution Table entries
• Link Operations: Add or delete links (unidirectional or bidirectional)
• Audit Logging: Full audit trail persisted to JSON
• Rollback: Snapshot-based rollback system to undo changes
• Safe Operations: Detailed change preview and confirmation before any mutation
• Async Architecture: Built on bacpypes3 with modern async/await patterns

Installation

# Install from PyPI
pip install ace-bbmd-manager

# Or install with uv
uv pip install ace-bbmd-manager

Development Installation

# Clone the repository
git clone https://github.com/ACE-IoT-Solutions/ace-bbmd-manager.git
cd ace-bbmd-manager

# Install with uv
uv sync

# Or install with pip in editable mode
pip install -e .

Quick Start

# Set your local IP address (the interface to use for BACnet communication)
export BBMD_LOCAL_ADDRESS=192.168.1.100

# Discover the BBMD network starting from a known BBMD
bbmd-manager walk 192.168.1.1

# View the discovered network
bbmd-manager status

# View all links
bbmd-manager links

Commands

Network Discovery

walk

Walk the BBMD network starting from one or more seed addresses. Discovers all reachable BBMDs by following BDT entries.

bbmd-manager -l 192.168.1.100 walk 192.168.1.1
bbmd-manager -l 192.168.1.100 walk 192.168.1.1 192.168.1.2 --depth 5

read

Read the BDT from a single BBMD.

bbmd-manager -l 192.168.1.100 read 192.168.1.1

Network Status

status

Show the cached network state with all BBMDs and their BDT entries.

bbmd-manager status
bbmd-manager status --format json

links

Display all links in the network, indicating which are bidirectional.

bbmd-manager links

Link Management

add-link

Add a link from one BBMD to another. Shows a detailed preview of changes before applying.

# Add unidirectional link: A -> B
bbmd-manager -l 192.168.1.100 add-link 192.168.1.1 192.168.1.2

# Add bidirectional link: A <-> B
bbmd-manager -l 192.168.1.100 add-link 192.168.1.1 192.168.1.2 --bidirectional

# Skip confirmation prompt
bbmd-manager -l 192.168.1.100 add-link 192.168.1.1 192.168.1.2 -b -y

delete-link

Delete a link between BBMDs. Shows a detailed preview of changes before applying.

# Delete unidirectional link: A -> B
bbmd-manager -l 192.168.1.100 delete-link 192.168.1.1 192.168.1.2

# Delete bidirectional link: A <-> B and B <-> A
bbmd-manager -l 192.168.1.100 delete-link 192.168.1.1 192.168.1.2 --bidirectional

delete-bbmd

Remove a BBMD from the network entirely. This removes it from all other BBMDs' BDTs and clears its own BDT.

bbmd-manager -l 192.168.1.100 delete-bbmd 192.168.1.3

Audit & Rollback

audit

View the audit log of all operations.

bbmd-manager audit
bbmd-manager audit --limit 50
bbmd-manager audit --action add_link
bbmd-manager audit --bbmd 192.168.1.1:47808

snapshots

List available snapshots for rollback.

bbmd-manager snapshots
bbmd-manager snapshots --limit 5

diff

Show differences between a snapshot and the current state.

bbmd-manager diff <snapshot-id>

rewind

Restore the network to a previous snapshot state.

# Preview what would change (dry run)
bbmd-manager rewind <snapshot-id> --dry-run

# Apply the rewind
bbmd-manager -l 192.168.1.100 rewind <snapshot-id>

Utility Commands

clear-state

Clear the cached network state (does not affect actual BBMDs).

bbmd-manager clear-state

clear-history

Clear audit log and/or snapshots.

bbmd-manager clear-history        # Clear audit log only
bbmd-manager clear-history --all  # Clear audit log and snapshots

Global Options

Option	Environment Variable	Description
-l, --local-address	BBMD_LOCAL_ADDRESS	Local IP address for BACnet communication
-s, --state-file		Path to state file (default: .bbmd_state.json)
-a, --audit-file		Path to audit log file (default: .bbmd_audit.json)
--snapshot-file		Path to snapshots file (default: .bbmd_snapshots.json)
-v, --verbose		Enable verbose output
-d, --debug		Enable debug output for BACnet protocol

Example Workflow

# 1. Discover the network
bbmd-manager -l 10.0.0.100 walk 10.0.0.1

# 2. View current topology
bbmd-manager status
bbmd-manager links

# 3. Add a new BBMD to the network (bidirectional links to existing BBMD)
bbmd-manager -l 10.0.0.100 add-link 10.0.0.1 10.0.0.99 --bidirectional
# Review the proposed changes, then confirm

# 4. Oops! Need to undo that change
bbmd-manager snapshots  # Find the snapshot ID
bbmd-manager -l 10.0.0.100 rewind <snapshot-id>

# 5. Remove a BBMD from the network
bbmd-manager -l 10.0.0.100 delete-bbmd 10.0.0.50
# Review the proposed changes, then confirm

Change Preview

All mutation commands show a detailed preview before making changes:

============================================================
PROPOSED CHANGES
============================================================

BBMD: 192.168.1.1:47808
  Action: Add entry -> 192.168.1.99:47808
  Current BDT: 192.168.1.2, 192.168.1.3
  New BDT:     192.168.1.2, 192.168.1.3, 192.168.1.99:47808

BBMD: 192.168.1.99:47808
  Action: Add entry -> 192.168.1.1:47808
  Current BDT: (empty)
  New BDT:     192.168.1.1:47808

============================================================
Total BBMDs to modify: 2
============================================================

Proceed with these changes? [y/N]:

State Files

The tool maintains three JSON files for persistence:

File	Description
.bbmd_state.json	Cached network topology
.bbmd_audit.json	Audit log of all operations
.bbmd_snapshots.json	Snapshots for rollback

These files are created in the current working directory by default.

Development

# Install dev dependencies
uv sync

# Run tests
pytest tests/ -v

# Run with debug output
bbmd-manager -l 192.168.1.100 -d read 192.168.1.1

Requirements

• Python 3.8+
• bacpypes3 (BACnet protocol library)
• click (CLI framework)

License

MIT