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use crate::types::{AppConfig, NetworkState, Result};
/// Manages NFTables rules based on network state.
pub struct NftablesManager {
config: AppConfig, // May need specific nftables config later
// Add state if needed, e.g., loaded templates
}
impl NftablesManager {
pub fn new(config: AppConfig) -> Self {
NftablesManager { config }
}
/// Loads rule templates or configurations.
/// Placeholder for now.
pub fn load_rules(&mut self) -> Result<()> {
tracing::info!(
"Loading NFTables rules (currently a placeholder) from path: {:?}",
self.config.nftables_rules_path
);
// TODO: Implement loading logic (e.g., read template files)
Ok(())
}
/// Applies NFTables rules based on the current network state.
/// Placeholder implementation - logs the intended action.
pub async fn apply_rules(&self, state: &NetworkState) -> Result<()> {
tracing::info!(
"Applying NFTables rules (placeholder) for state: {:?}",
state
);
// --- Placeholder Logic ---
// In a real implementation:
// 1. Generate nftables rules based on `state` and `self.config`.
// - Iterate through `state.interface_ips`.
// - Find corresponding `InterfaceConfig` in `self.config.interfaces`.
// - Use `nftables_zone` and IP addresses to generate rules (e.g., update sets).
// 2. Apply the rules atomically.
// - Option A: Use `nftnl` library to construct and send Netlink messages.
// - Option B: Generate an `nft` script and execute `nft -f /path/to/script`.
for (if_name, ips) in &state.interface_ips {
if let Some(if_config) = self.config.interfaces.iter().find(|i| &i.name == if_name) {
if let Some(zone) = &if_config.nftables_zone {
tracing::debug!(
"Would update nftables set for zone '{}' on interface '{}' with IPs: {:?}",
zone, if_name, ips
);
// Example using `nft` command (requires error handling and proper escaping):
// let ip_list = ips.iter().map(|ip| ip.to_string()).collect::<Vec<_>>().join(", ");
// let command = format!("nft add element inet filter {}_ips {{ {} }}", zone, ip_list);
// tracing::debug!("Executing: {}", command);
// let output = tokio::process::Command::new("nft")
// .arg(command)
// .output()
// .await
// .map_err(|e| AppError::Nftables(format!("Failed to execute nft: {}", e)))?;
// if !output.status.success() {
// return Err(AppError::Nftables(format!(
// "nft command failed: {}\nStderr: {}",
// command,
// String::from_utf8_lossy(&output.stderr)
// )));
// }
}
}
}
tracing::warn!("NFTables rule application is currently a placeholder.");
Ok(())
}
}
#[cfg(test)]
pub mod tests {
use super::*;
use crate::types::{AppConfig, InterfaceConfig, NetworkState};
use std::collections::HashMap;
use std::net::IpAddr;
fn create_test_config() -> AppConfig {
AppConfig {
interfaces: vec![
InterfaceConfig {
name: "eth0".to_string(),
dhcp: Some(true),
address: None,
nftables_zone: Some("wan".to_string()),
},
InterfaceConfig {
name: "eth1".to_string(),
dhcp: None,
address: Some("192.168.1.1/24".to_string()),
nftables_zone: Some("lan".to_string()),
},
],
socket_path: None,
nftables_rules_path: Some("/tmp/nft_rules".to_string()),
}
}
#[tokio::test]
async fn test_apply_rules_placeholder() {
let config = create_test_config();
let manager = NftablesManager::new(config);
let mut state = NetworkState::new();
state.interface_ips.insert(
"eth0".to_string(),
vec!["1.1.1.1".parse::<IpAddr>().unwrap()],
);
state.interface_ips.insert(
"eth1".to_string(),
vec!["192.168.1.5".parse::<IpAddr>().unwrap(), "fe80::1".parse::<IpAddr>().unwrap()],
);
// This just checks that the placeholder function runs without panic
let result = manager.apply_rules(&state).await;
assert!(result.is_ok());
}
#[tokio::test]
async fn test_load_rules_placeholder() {
let config = create_test_config();
let mut manager = NftablesManager::new(config);
// This just checks that the placeholder function runs without panic
let result = manager.load_rules();
assert!(result.is_ok());
}
}