Core simulator

• Multi-agent SNMPv3 simulator running each agent in its own thread with clean start/stop and teardown.

• Auth/Priv support: MD5/SHA/SHA2 family for auth; DES/3DES/AES (128/192/256) for privacy; enforces auth required for priv.

• MIB from CSV: Per-device-type CSVs define OIDs, types, and behaviors (static/dynamic/settable). Per-IP CSVs are generated automatically.

• SET persistence: When a SET succeeds, the new value is written back to the per-IP CSV so it survives restarts.

• Dynamic and static values: Numeric/text randomization for value_type=dynamic; fixed values for static.

Protocol handling & diagnostics

• GET/GETNEXT/BULK/SET responders via pysnmp.

• USM Report classification with human-readable reasons (unknownUserName, notInTimeWindows, wrongDigests, etc.).

• Invalid OID detection: Logs exact OIDs requested that aren’t exported or return NoSuch*.

• Request/response observers: Detailed per-PDU logging including client IP, PDU type, error indexes, and varbinds.

• Ready watcher: Background wait so “Agent Ready” is logged once agents have initialized.

File & data layout

• Device types: device_types/<device_type>.csv

• Per-IP data: device_data/<ip_underscored>.csv, auto-provisioned from device type definitions.

• Agents config: agents.csv (ip, user, port, auth/priv details, device_type).

Graphical User Interface

• Top-bar Light/Dark mode toggle (global palette switch, Fusion style for consistent look).

• System tab

  • Start/Stop simulator, clear log.

  • Live log viewer with color cues (green info milestones, orange warnings, red errors).

  • Status indicator (Running/Stopped).

• Agents tab

  • One-click Refresh of agent list from agents.csv.

  • Live UDP listen probe per agent/IP/port:

    • “LISTENING” (green) if the port is in use by the simulator,

    • “NOT LISTENING” / specific socket errors (coloured).

  • Auto-sizing table columns.

Logging

• Unified logging to console, CSV file (log.csv), and the Qt log pane.

• CSV format: timestamp, level, message for easy parsing.

• Highlights important milestones (Device Data Ready, Agent Ready) and error conditions (INVALID_OID, INVALID_IP, invalid creds).