ant_quic/discovery/
linux.rs

1//! Linux Network Discovery Implementation
2//!
3//! This module implements network interface discovery for Linux using the
4//! Netlink API. It provides comprehensive error handling and interface caching.
5
6use netlink_packet_route::address::AddressMessage;
7use netlink_packet_route::link::LinkMessage;
8use netlink_sys::Socket;
9use std::collections::HashMap;
10use std::net::{IpAddr, SocketAddr};
11use std::time::{Duration, Instant};
12
13use super::{DiscoveryError, NetworkDiscovery, NetworkInterface};
14
15/// Linux-specific network discovery implementation
16pub struct LinuxDiscovery {
17    // Cache of discovered interfaces
18    cache: Option<InterfaceCache>,
19    // Cache refresh interval
20    cache_refresh_interval: Duration,
21}
22
23/// Cache for network interfaces
24struct InterfaceCache {
25    // Cached interfaces
26    interfaces: Vec<NetworkInterface>,
27    // Last refresh time
28    last_refresh: Instant,
29}
30
31impl LinuxDiscovery {
32    /// Create a new Linux discovery instance
33    pub fn new(cache_refresh_interval: Duration) -> Self {
34        Self {
35            cache: None,
36            cache_refresh_interval,
37        }
38    }
39
40    /// Refresh the interface cache if needed
41    fn refresh_cache_if_needed(&mut self) -> Result<(), DiscoveryError> {
42        let should_refresh = match &self.cache {
43            Some(cache) => cache.last_refresh.elapsed() >= self.cache_refresh_interval,
44            None => true,
45        };
46
47        if should_refresh {
48            self.refresh_cache()?;
49        }
50
51        Ok(())
52    }
53
54    /// Force refresh the interface cache
55    fn refresh_cache(&mut self) -> Result<(), DiscoveryError> {
56        // Placeholder - actual implementation would use Linux Netlink API
57        let interfaces = self.get_interfaces_from_system()?;
58
59        self.cache = Some(InterfaceCache {
60            interfaces,
61            last_refresh: Instant::now(),
62        });
63
64        Ok(())
65    }
66
67    /// Get interfaces from the system using Linux Netlink API
68    fn get_interfaces_from_system(&self) -> Result<Vec<NetworkInterface>, DiscoveryError> {
69        // Placeholder - actual implementation would use Linux Netlink API
70        // to enumerate network interfaces and their addresses
71
72        Ok(Vec::new())
73    }
74}
75
76impl NetworkDiscovery for LinuxDiscovery {
77    fn discover_interfaces(&self) -> Result<Vec<NetworkInterface>, DiscoveryError> {
78        // Use cached interfaces if available and not expired
79        if let Some(cache) = &self.cache {
80            if cache.last_refresh.elapsed() < self.cache_refresh_interval {
81                return Ok(cache.interfaces.clone());
82            }
83        }
84
85        // Otherwise, refresh the cache
86        let mut this = self.clone();
87        this.refresh_cache()?;
88
89        // Return the refreshed interfaces
90        match &this.cache {
91            Some(cache) => Ok(cache.interfaces.clone()),
92            None => Err(DiscoveryError::InternalError("Cache refresh failed".into())),
93        }
94    }
95
96    fn get_default_route(&self) -> Result<Option<SocketAddr>, DiscoveryError> {
97        // Placeholder - actual implementation would determine the default route
98        // using the Linux Netlink API
99
100        Ok(None)
101    }
102}
103
104impl Clone for LinuxDiscovery {
105    fn clone(&self) -> Self {
106        Self {
107            cache: self.cache.clone(),
108            cache_refresh_interval: self.cache_refresh_interval,
109        }
110    }
111}
112
113impl Clone for InterfaceCache {
114    fn clone(&self) -> Self {
115        Self {
116            interfaces: self.interfaces.clone(),
117            last_refresh: self.last_refresh,
118        }
119    }
120}
ant_quic/discovery/linux.rs

ant_quic/discovery/
linux.rs
