Module monitor 

Connection monitoring module (FR-010)

This module provides connection state monitoring with optional automatic reconnection support.

Overview

The monitor module helps track the health of CAN backend connections and optionally handles automatic reconnection when connections are lost.

Components

• ConnectionMonitor: Main monitoring component
• ConnectionState: Current connection state (Connected, Disconnected, Reconnecting)
• ReconnectConfig: Configuration for automatic reconnection
• MonitorConfig: Configuration loaded from TOML files

Connection States

• ConnectionState::Connected: Backend is operational
• ConnectionState::Disconnected: Connection lost, needs re-initialization
• ConnectionState::Reconnecting: Auto-reconnect in progress

Example

use canlink_hal::monitor::{ConnectionMonitor, ConnectionState, ReconnectConfig};
use std::time::Duration;

// Create monitor without auto-reconnect
let monitor = ConnectionMonitor::new(Duration::from_secs(1));
assert_eq!(monitor.state(), ConnectionState::Connected);

// Create monitor with auto-reconnect
let reconnect_config = ReconnectConfig::exponential_backoff(
    5,                          // max retries
    Duration::from_secs(1),     // initial interval
    2.0,                        // backoff multiplier
);
let monitor = ConnectionMonitor::with_reconnect(
    Duration::from_secs(1),
    reconnect_config,
);
assert!(monitor.auto_reconnect_enabled());

Auto-Reconnect

When auto-reconnect is enabled, the monitor will automatically attempt to reconnect when a disconnection is detected. The reconnection behavior is controlled by ReconnectConfig:

• max_retries: Maximum reconnection attempts (0 = unlimited)
• retry_interval: Initial delay between attempts
• backoff_multiplier: Exponential backoff factor

Structs

ConnectionMonitor

Connection monitor

MonitorConfig

Monitor configuration from TOML

ReconnectConfig

Reconnection configuration

Enums

ConnectionState

Connection state