     1→//! System metrics collection module
     2→//!
     3→//! Uses the `sysinfo` crate for cross-platform system metrics collection.
     4→//! Collects CPU, memory, disk, and network statistics.
     5→//! Uses `local-ip-address` for network interface enumeration.
     6→
     7→use chrono::{DateTime, Utc};
     8→use local_ip_address::list_afinet_netifas;
     9→use serde::{Deserialize, Serialize};
    10→use std::collections::HashMap;
    11→use std::net::IpAddr;
    12→use std::sync::Mutex;
    13→use sysinfo::{CpuRefreshKind, Disks, MemoryRefreshKind, Networks, RefreshKind, System, Users};
    14→
    15→/// System metrics data structure
    16→#[derive(Debug, Clone, Serialize, Deserialize)]
    17→pub struct SystemMetrics {
    18→    /// Timestamp when metrics were collected
    19→    pub timestamp: DateTime<Utc>,
    20→
    21→    /// CPU usage percentage (0-100)
    22→    pub cpu_percent: f32,
    23→
    24→    /// Memory usage percentage (0-100)
    25→    pub memory_percent: f32,
    26→
    27→    /// Memory used in bytes
    28→    pub memory_used_bytes: u64,
    29→
    30→    /// Total memory in bytes
    31→    pub memory_total_bytes: u64,
    32→
    33→    /// Disk usage percentage (0-100) - primary disk
    34→    pub disk_percent: f32,
    35→
    36→    /// Disk used in bytes - primary disk
    37→    pub disk_used_bytes: u64,
    38→
    39→    /// Total disk space in bytes - primary disk
    40→    pub disk_total_bytes: u64,
    41→
    42→    /// Network bytes received since last collection
    43→    pub network_rx_bytes: u64,
    44→
    45→    /// Network bytes transmitted since last collection
    46→    pub network_tx_bytes: u64,
    47→
    48→    /// Operating system type
    49→    pub os_type: String,
    50→
    51→    /// Operating system version
    52→    pub os_version: String,
    53→
    54→    /// System hostname
    55→    pub hostname: String,
    56→
    57→    /// System uptime in seconds
    58→    #[serde(default)]
    59→    pub uptime_seconds: u64,
    60→
    61→    /// Boot time as Unix timestamp
    62→    #[serde(default)]
    63→    pub boot_time: i64,
    64→
    65→    /// Logged in username (if available)
    66→    #[serde(default)]
    67→    pub logged_in_user: Option<String>,
    68→
    69→    /// User idle time in seconds (time since last input)
    70→    #[serde(default)]
    71→    pub user_idle_seconds: Option<u64>,
    72→
    73→    /// Public/WAN IP address (fetched periodically)
    74→    #[serde(default)]
    75→    pub public_ip: Option<String>,
    76→}
    77→
    78→/// Metrics collector using sysinfo
    79→pub struct MetricsCollector {
    80→    /// System info instance (needs to be refreshed for each collection)
    81→    system: Mutex<System>,
    82→
    83→    /// Previous network stats for delta calculation
    84→    prev_network_rx: Mutex<u64>,
    85→    prev_network_tx: Mutex<u64>,
    86→
    87→    /// Cached public IP (refreshed less frequently)
    88→    cached_public_ip: Mutex<Option<String>>,
    89→
    90→    /// Last time public IP was fetched
    91→    last_public_ip_fetch: Mutex<Option<std::time::Instant>>,
    92→}
    93→
    94→impl MetricsCollector {
    95→    /// Create a new metrics collector
    96→    pub fn new() -> Self {
    97→        // Create system with minimal initial refresh
    98→        let system = System::new_with_specifics(
    99→            RefreshKind::new()
   100→                .with_cpu(CpuRefreshKind::everything())
   101→                .with_memory(MemoryRefreshKind::everything()),
   102→        );
   103→
   104→        Self {
   105→            system: Mutex::new(system),
   106→            prev_network_rx: Mutex::new(0),
   107→            prev_network_tx: Mutex::new(0),
   108→            cached_public_ip: Mutex::new(None),
   109→            last_public_ip_fetch: Mutex::new(None),
   110→        }
   111→    }
   112→
   113→    /// Collect current system metrics
   114→    pub async fn collect(&self) -> SystemMetrics {
   115→        // Collect CPU - need to do two refreshes with delay for accurate reading
   116→        // We release the lock between operations to avoid holding MutexGuard across await
   117→        {
   118→            let mut system = self.system.lock().unwrap();
   119→            system.refresh_cpu_all();
   120→        }
   121→
   122→        // Small delay for CPU measurement accuracy
   123→        tokio::time::sleep(tokio::time::Duration::from_millis(200)).await;
   124→
   125→        // Collect all synchronous metrics first, in a block that releases all locks
   126→        let (
   127→            cpu_percent,
   128→            memory_percent,
   129→            memory_used,
   130→            memory_total,
   131→            disk_percent,
   132→            disk_used,
   133→            disk_total,
   134→            delta_rx,
   135→            delta_tx,
   136→            os_type,
   137→            os_version,
   138→            hostname,
   139→            uptime_seconds,
   140→            boot_time,
   141→            logged_in_user,
   142→            user_idle_seconds,
   143→        ) = {
   144→            // Acquire system lock
   145→            let mut system = self.system.lock().unwrap();
   146→            system.refresh_cpu_all();
   147→            system.refresh_memory();
   148→
   149→            // Calculate CPU usage (average across all cores)
   150→            let cpu_percent = system.global_cpu_usage();
   151→
   152→            // Memory metrics
   153→            let memory_used = system.used_memory();
   154→            let memory_total = system.total_memory();
   155→            let memory_percent = if memory_total > 0 {
   156→                (memory_used as f32 / memory_total as f32) * 100.0
   157→            } else {
   158→                0.0
   159→            };
   160→
   161→            // Disk metrics (use first/primary disk)
   162→            let disks = Disks::new_with_refreshed_list();
   163→            let (disk_used, disk_total, disk_percent) = disks
   164→                .iter()
   165→                .next()
   166→                .map(|d| {
   167→                    let total = d.total_space();
   168→                    let available = d.available_space();
   169→                    let used = total.saturating_sub(available);
   170→                    let percent = if total > 0 {
   171→                        (used as f32 / total as f32) * 100.0
   172→                    } else {
   173→                        0.0
   174→                    };
   175→                    (used, total, percent)
   176→                })
   177→                .unwrap_or((0, 0, 0.0));
   178→
   179→            // Network metrics (sum all interfaces)
   180→            let networks = Networks::new_with_refreshed_list();
   181→            let (total_rx, total_tx): (u64, u64) = networks
   182→                .iter()
   183→                .map(|(_, data)| (data.total_received(), data.total_transmitted()))
   184→                .fold((0, 0), |(acc_rx, acc_tx), (rx, tx)| {
   185→                    (acc_rx + rx, acc_tx + tx)
   186→                });
   187→
   188→            // Calculate delta from previous collection
   189→            let (delta_rx, delta_tx) = {
   190→                let mut prev_rx = self.prev_network_rx.lock().unwrap();
   191→                let mut prev_tx = self.prev_network_tx.lock().unwrap();
   192→
   193→                let delta_rx = total_rx.saturating_sub(*prev_rx);
   194→                let delta_tx = total_tx.saturating_sub(*prev_tx);
   195→
   196→                *prev_rx = total_rx;
   197→                *prev_tx = total_tx;
   198→
   199→                (delta_rx, delta_tx)
   200→            };
   201→
   202→            // Get OS info
   203→            let os_type = std::env::consts::OS.to_string();
   204→            let os_version = System::os_version().unwrap_or_else(|| "unknown".to_string());
   205→            let hostname = System::host_name().unwrap_or_else(|| "unknown".to_string());
   206→
   207→            // Get uptime and boot time
   208→            let uptime_seconds = System::uptime();
   209→            let boot_time = System::boot_time() as i64;
   210→
   211→            // Get logged in user
   212→            let logged_in_user = self.get_logged_in_user();
   213→
   214→            // Get user idle time (platform-specific)
   215→            let user_idle_seconds = self.get_user_idle_time();
   216→
   217→            // Return all values - locks are dropped at end of this block
   218→            (
   219→                cpu_percent,
   220→                memory_percent,
   221→                memory_used,
   222→                memory_total,
   223→                disk_percent,
   224→                disk_used,
   225→                disk_total,
   226→                delta_rx,
   227→                delta_tx,
   228→                os_type,
   229→                os_version,
   230→                hostname,
   231→                uptime_seconds,
   232→                boot_time,
   233→                logged_in_user,
   234→                user_idle_seconds,
   235→            )
   236→        };
   237→
   238→        // All locks are now released - safe to do async work
   239→        // Get public IP (cached, refreshed every 5 minutes)
   240→        let public_ip = self.get_public_ip().await;
   241→
   242→        SystemMetrics {
   243→            timestamp: Utc::now(),
   244→            cpu_percent,
   245→            memory_percent,
   246→            memory_used_bytes: memory_used,
   247→            memory_total_bytes: memory_total,
   248→            disk_percent,
   249→            disk_used_bytes: disk_used,
   250→            disk_total_bytes: disk_total,
   251→            network_rx_bytes: delta_rx,
   252→            network_tx_bytes: delta_tx,
   253→            os_type,
   254→            os_version,
   255→            hostname,
   256→            uptime_seconds,
   257→            boot_time,
   258→            logged_in_user,
   259→            user_idle_seconds,
   260→            public_ip,
   261→        }
   262→    }
   263→
   264→    /// Get the currently logged in user
   265→    fn get_logged_in_user(&self) -> Option<String> {
   266→        let users = Users::new_with_refreshed_list();
   267→        // Return the first user found (typically the console user)
   268→        users.iter().next().map(|u| u.name().to_string())
   269→    }
   270→
   271→    /// Get user idle time in seconds (time since last keyboard/mouse input)
   272→    #[cfg(target_os = "windows")]
   273→    fn get_user_idle_time(&self) -> Option<u64> {
   274→        // Windows: Use GetLastInputInfo API
   275→        use std::mem;
   276→
   277→        #[repr(C)]
   278→        struct LASTINPUTINFO {
   279→            cb_size: u32,
   280→            dw_time: u32,
   281→        }
   282→
   283→        extern "system" {
   284→            fn GetLastInputInfo(plii: *mut LASTINPUTINFO) -> i32;
   285→            fn GetTickCount() -> u32;
   286→        }
   287→
   288→        unsafe {
   289→            let mut lii = LASTINPUTINFO {
   290→                cb_size: mem::size_of::<LASTINPUTINFO>() as u32,
   291→                dw_time: 0,
   292→            };
   293→
   294→            if GetLastInputInfo(&mut lii) != 0 {
   295→                let idle_ms = GetTickCount().wrapping_sub(lii.dw_time);
   296→                Some((idle_ms / 1000) as u64)
   297→            } else {
   298→                None
   299→            }
   300→        }
   301→    }
   302→
   303→    /// Get user idle time in seconds (Unix/macOS)
   304→    #[cfg(not(target_os = "windows"))]
   305→    fn get_user_idle_time(&self) -> Option<u64> {
   306→        // Unix: Check /dev/tty* or use platform-specific APIs
   307→        // For now, return None - can be enhanced with X11/Wayland idle detection
   308→        None
   309→    }
   310→
   311→    /// Get public IP address (cached for 5 minutes)
   312→    async fn get_public_ip(&self) -> Option<String> {
   313→        use std::time::{Duration, Instant};
   314→
   315→        const REFRESH_INTERVAL: Duration = Duration::from_secs(300); // 5 minutes
   316→
   317→        // Check if we have a cached value that's still fresh
   318→        {
   319→            let last_fetch = self.last_public_ip_fetch.lock().unwrap();
   320→            let cached_ip = self.cached_public_ip.lock().unwrap();
   321→
   322→            if let Some(last) = *last_fetch {
   323→                if last.elapsed() < REFRESH_INTERVAL {
   324→                    return cached_ip.clone();
   325→                }
   326→            }
   327→        }
   328→
   329→        // Fetch new public IP
   330→        let new_ip = self.fetch_public_ip().await;
   331→
   332→        // Update cache
   333→        {
   334→            let mut last_fetch = self.last_public_ip_fetch.lock().unwrap();
   335→            let mut cached_ip = self.cached_public_ip.lock().unwrap();
   336→            *last_fetch = Some(Instant::now());
   337→            *cached_ip = new_ip.clone();
   338→        }
   339→
   340→        new_ip
   341→    }
   342→
   343→    /// Fetch public IP from external service
   344→    async fn fetch_public_ip(&self) -> Option<String> {
   345→        // Try multiple services for reliability
   346→        let services = [
   347→            "https://api.ipify.org",
   348→            "https://ifconfig.me/ip",
   349→            "https://icanhazip.com",
   350→        ];
   351→
   352→        for service in &services {
   353→            match reqwest::get(*service).await {
   354→                Ok(resp) if resp.status().is_success() => {
   355→                    if let Ok(ip) = resp.text().await {
   356→                        let ip = ip.trim().to_string();
   357→                        // Basic validation: should look like an IP
   358→                        if ip.parse::<std::net::IpAddr>().is_ok() {
   359→                            return Some(ip);
   360→                        }
   361→                    }
   362→                }
   363→                _ => continue,
   364→            }
   365→        }
   366→
   367→        None
   368→    }
   369→
   370→    /// Get basic system info (for registration)
   371→    pub fn get_system_info(&self) -> SystemInfo {
   372→        let system = self.system.lock().unwrap();
   373→
   374→        SystemInfo {
   375→            os_type: std::env::consts::OS.to_string(),
   376→            os_version: System::os_version().unwrap_or_else(|| "unknown".to_string()),
   377→            hostname: System::host_name().unwrap_or_else(|| "unknown".to_string()),
   378→            cpu_count: system.cpus().len() as u32,
   379→            total_memory_bytes: system.total_memory(),
   380→        }
   381→    }
   382→}
   383→
   384→impl Default for MetricsCollector {
   385→    fn default() -> Self {
   386→        Self::new()
   387→    }
   388→}
   389→
   390→/// Basic system information (for agent registration)
   391→#[derive(Debug, Clone, Serialize, Deserialize)]
   392→pub struct SystemInfo {
   393→    /// Operating system type (windows, linux, macos)
   394→    pub os_type: String,
   395→
   396→    /// Operating system version
   397→    pub os_version: String,
   398→
   399→    /// System hostname
   400→    pub hostname: String,
   401→
   402→    /// Number of CPU cores
   403→    pub cpu_count: u32,
   404→
   405→    /// Total memory in bytes
   406→    pub total_memory_bytes: u64,
   407→}
   408→
   409→/// Network interface information
   410→#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
   411→pub struct NetworkInterface {
   412→    /// Interface name (e.g., "eth0", "Wi-Fi", "Ethernet")
   413→    pub name: String,
   414→
   415→    /// MAC address (if available from sysinfo)
   416→    pub mac_address: Option<String>,
   417→
   418→    /// IPv4 addresses assigned to this interface
   419→    pub ipv4_addresses: Vec<String>,
   420→
   421→    /// IPv6 addresses assigned to this interface
   422→    pub ipv6_addresses: Vec<String>,
   423→}
   424→
   425→/// Complete network state (sent on connect and on change)
   426→#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
   427→pub struct NetworkState {
   428→    /// Timestamp when network state was collected
   429→    pub timestamp: DateTime<Utc>,
   430→
   431→    /// All network interfaces with their addresses
   432→    pub interfaces: Vec<NetworkInterface>,
   433→
   434→    /// Hash of the network state for quick change detection
   435→    pub state_hash: String,
   436→}
   437→
   438→impl NetworkState {
   439→    /// Collect current network state from the system
   440→    pub fn collect() -> Self {
   441→        let mut interface_map: HashMap<String, NetworkInterface> = HashMap::new();
   442→
   443→        // Get IP addresses from local-ip-address crate
   444→        if let Ok(netifas) = list_afinet_netifas() {
   445→            for (name, ip) in netifas {
   446→                let entry = interface_map.entry(name.clone()).or_insert_with(|| {
   447→                    NetworkInterface {
   448→                        name: name.clone(),
   449→                        mac_address: None,
   450→                        ipv4_addresses: Vec::new(),
   451→                        ipv6_addresses: Vec::new(),
   452→                    }
   453→                });
   454→
   455→                match ip {
   456→                    IpAddr::V4(addr) => {
   457→                        let addr_str = addr.to_string();
   458→                        if !entry.ipv4_addresses.contains(&addr_str) {
   459→                            entry.ipv4_addresses.push(addr_str);
   460→                        }
   461→                    }
   462→                    IpAddr::V6(addr) => {
   463→                        let addr_str = addr.to_string();
   464→                        if !entry.ipv6_addresses.contains(&addr_str) {
   465→                            entry.ipv6_addresses.push(addr_str);
   466→                        }
   467→                    }
   468→                }
   469→            }
   470→        }
   471→
   472→        // Get MAC addresses from sysinfo
   473→        let networks = Networks::new_with_refreshed_list();
   474→        for (name, data) in &networks {
   475→            if let Some(entry) = interface_map.get_mut(name) {
   476→                let mac = data.mac_address();
   477→                let mac_str = format!(
   478→                    "{:02X}:{:02X}:{:02X}:{:02X}:{:02X}:{:02X}",
   479→                    mac.0[0], mac.0[1], mac.0[2], mac.0[3], mac.0[4], mac.0[5]
   480→                );
   481→                // Don't store empty/null MACs
   482→                if mac_str != "00:00:00:00:00:00" {
   483→                    entry.mac_address = Some(mac_str);
   484→                }
   485→            }
   486→        }
   487→
   488→        // Convert to sorted vec for consistent ordering
   489→        let mut interfaces: Vec<NetworkInterface> = interface_map.into_values().collect();
   490→        interfaces.sort_by(|a, b| a.name.cmp(&b.name));
   491→
   492→        // Filter out loopback and link-local only interfaces
   493→        interfaces.retain(|iface| {
   494→            // Keep if has any non-loopback IPv4
   495→            let has_real_ipv4 = iface.ipv4_addresses.iter().any(|ip| {
   496→                !ip.starts_with("127.") && !ip.starts_with("169.254.")
   497→            });
   498→            // Keep if has any non-link-local IPv6
   499→            let has_real_ipv6 = iface.ipv6_addresses.iter().any(|ip| {
   500→                !ip.starts_with("fe80:") && !ip.starts_with("::1")
   501→            });
   502→            has_real_ipv4 || has_real_ipv6
   503→        });
   504→
   505→        // Generate hash for change detection
   506→        let state_hash = Self::compute_hash(&interfaces);
   507→
   508→        NetworkState {
   509→            timestamp: Utc::now(),
   510→            interfaces,
   511→            state_hash,
   512→        }
   513→    }
   514→
   515→    /// Compute a simple hash of the network state for change detection
   516→    fn compute_hash(interfaces: &[NetworkInterface]) -> String {
   517→        use std::collections::hash_map::DefaultHasher;
   518→        use std::hash::{Hash, Hasher};
   519→
   520→        let mut hasher = DefaultHasher::new();
   521→        for iface in interfaces {
   522→            iface.name.hash(&mut hasher);
   523→            iface.mac_address.hash(&mut hasher);
   524→            for ip in &iface.ipv4_addresses {
   525→                ip.hash(&mut hasher);
   526→            }
   527→            for ip in &iface.ipv6_addresses {
   528→                ip.hash(&mut hasher);
   529→            }
   530→        }
   531→        format!("{:016x}", hasher.finish())
   532→    }
   533→
   534→    /// Check if network state has changed compared to another state
   535→    pub fn has_changed(&self, other: &NetworkState) -> bool {
   536→        self.state_hash != other.state_hash
   537→    }
   538→}
   539→
   540→#[cfg(test)]
   541→mod tests {
   542→    use super::*;
   543→
   544→    #[tokio::test]
   545→    async fn test_metrics_collection() {
   546→        let collector = MetricsCollector::new();
   547→        let metrics = collector.collect().await;
   548→
   549→        // Basic sanity checks
   550→        assert!(metrics.cpu_percent >= 0.0 && metrics.cpu_percent <= 100.0);
   551→        assert!(metrics.memory_percent >= 0.0 && metrics.memory_percent <= 100.0);
   552→        assert!(metrics.memory_total_bytes > 0);
   553→        assert!(!metrics.os_type.is_empty());
   554→        assert!(!metrics.hostname.is_empty());
   555→    }
   556→
   557→    #[test]
   558→    fn test_system_info() {
   559→        let collector = MetricsCollector::new();
   560→        let info = collector.get_system_info();
   561→
   562→        assert!(!info.os_type.is_empty());
   563→        assert!(!info.hostname.is_empty());
   564→        assert!(info.cpu_count > 0);
   565→        assert!(info.total_memory_bytes > 0);
   566→    }
   567→
   568→    #[test]
   569→    fn test_network_state_collection() {
   570→        let state = NetworkState::collect();
   571→
   572→        // Should have a valid timestamp
   573→        assert!(state.timestamp <= Utc::now());
   574→
   575→        // Should have a hash
   576→        assert!(!state.state_hash.is_empty());
   577→        assert_eq!(state.state_hash.len(), 16); // 64-bit hash as hex
   578→
   579→        // Print for debugging
   580→        println!("Network state collected:");
   581→        for iface in &state.interfaces {
   582→            println!("  {}: IPv4={:?}, IPv6={:?}, MAC={:?}",
   583→                iface.name, iface.ipv4_addresses, iface.ipv6_addresses, iface.mac_address);
   584→        }
   585→    }
   586→
   587→    #[test]
   588→    fn test_network_state_change_detection() {
   589→        let state1 = NetworkState::collect();
   590→        let state2 = NetworkState::collect();
   591→
   592→        // Same state should have same hash
   593→        assert!(!state1.has_changed(&state2));
   594→
   595→        // Create a modified state
   596→        let mut modified = state1.clone();
   597→        if let Some(iface) = modified.interfaces.first_mut() {
   598→            iface.ipv4_addresses.push("10.99.99.99".to_string());
   599→        }
   600→        modified.state_hash = NetworkState::compute_hash(&modified.interfaces);
   601→
   602→        // Modified state should be detected as changed
   603→        assert!(state1.has_changed(&modified));
   604→    }
   605→}
   606→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

//! System metrics collection module
//!
//! Uses the `sysinfo` crate for cross-platform system metrics collection.
//! Collects CPU, memory, disk, and network statistics.
//! Uses `local-ip-address` for network interface enumeration.

use chrono::{DateTime, Utc};
use local_ip_address::list_afinet_netifas;
use serde::{Deserialize, Serialize};
use std::collections::HashMap;
use std::net::IpAddr;
use std::sync::Mutex;
use sysinfo::{CpuRefreshKind, Disks, MemoryRefreshKind, Networks, RefreshKind, System, Users};

/// System metrics data structure
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SystemMetrics {
    /// Timestamp when metrics were collected
    pub timestamp: DateTime<Utc>,

    /// CPU usage percentage (0-100)
    pub cpu_percent: f32,

    /// Memory usage percentage (0-100)
    pub memory_percent: f32,

    /// Memory used in bytes
    pub memory_used_bytes: u64,

    /// Total memory in bytes
    pub memory_total_bytes: u64,

    /// Disk usage percentage (0-100) - primary disk
    pub disk_percent: f32,

    /// Disk used in bytes - primary disk
    pub disk_used_bytes: u64,

    /// Total disk space in bytes - primary disk
    pub disk_total_bytes: u64,

    /// Network bytes received since last collection
    pub network_rx_bytes: u64,

    /// Network bytes transmitted since last collection
    pub network_tx_bytes: u64,

    /// Operating system type
    pub os_type: String,

    /// Operating system version
    pub os_version: String,

    /// System hostname
    pub hostname: String,

    /// System uptime in seconds
    #[serde(default)]
    pub uptime_seconds: u64,

    /// Boot time as Unix timestamp
    #[serde(default)]
    pub boot_time: i64,

    /// Logged in username (if available)
    #[serde(default)]
    pub logged_in_user: Option<String>,

    /// User idle time in seconds (time since last input)
    #[serde(default)]
    pub user_idle_seconds: Option<u64>,

    /// Public/WAN IP address (fetched periodically)
    #[serde(default)]
    pub public_ip: Option<String>,
}

/// Metrics collector using sysinfo
pub struct MetricsCollector {
    /// System info instance (needs to be refreshed for each collection)
    system: Mutex<System>,

    /// Previous network stats for delta calculation
    prev_network_rx: Mutex<u64>,
    prev_network_tx: Mutex<u64>,

    /// Cached public IP (refreshed less frequently)
    cached_public_ip: Mutex<Option<String>>,

    /// Last time public IP was fetched
    last_public_ip_fetch: Mutex<Option<std::time::Instant>>,
}

impl MetricsCollector {
    /// Create a new metrics collector
    pub fn new() -> Self {
        // Create system with minimal initial refresh
        let system = System::new_with_specifics(
            RefreshKind::new()
                .with_cpu(CpuRefreshKind::everything())
                .with_memory(MemoryRefreshKind::everything()),
        );

        Self {
            system: Mutex::new(system),
            prev_network_rx: Mutex::new(0),
            prev_network_tx: Mutex::new(0),
            cached_public_ip: Mutex::new(None),
            last_public_ip_fetch: Mutex::new(None),
        }
    }

    /// Collect current system metrics
    pub async fn collect(&self) -> SystemMetrics {
        // Collect CPU - need to do two refreshes with delay for accurate reading
        // We release the lock between operations to avoid holding MutexGuard across await
        {
            let mut system = self.system.lock().unwrap();
            system.refresh_cpu_all();
        }

        // Small delay for CPU measurement accuracy
        tokio::time::sleep(tokio::time::Duration::from_millis(200)).await;

        // Collect all synchronous metrics first, in a block that releases all locks
        let (
            cpu_percent,
            memory_percent,
            memory_used,
            memory_total,
            disk_percent,
            disk_used,
            disk_total,
            delta_rx,
            delta_tx,
            os_type,
            os_version,
            hostname,
            uptime_seconds,
            boot_time,
            logged_in_user,
            user_idle_seconds,
        ) = {
            // Acquire system lock
            let mut system = self.system.lock().unwrap();
            system.refresh_cpu_all();
            system.refresh_memory();

            // Calculate CPU usage (average across all cores)
            let cpu_percent = system.global_cpu_usage();

            // Memory metrics
            let memory_used = system.used_memory();
            let memory_total = system.total_memory();
            let memory_percent = if memory_total > 0 {
                (memory_used as f32 / memory_total as f32) * 100.0
            } else {
                0.0
            };

            // Disk metrics (use first/primary disk)
            let disks = Disks::new_with_refreshed_list();
            let (disk_used, disk_total, disk_percent) = disks
                .iter()
                .next()
                .map(|d| {
                    let total = d.total_space();
                    let available = d.available_space();
                    let used = total.saturating_sub(available);
                    let percent = if total > 0 {
                        (used as f32 / total as f32) * 100.0
                    } else {
                        0.0
                    };
                    (used, total, percent)
                })
                .unwrap_or((0, 0, 0.0));

            // Network metrics (sum all interfaces)
            let networks = Networks::new_with_refreshed_list();
            let (total_rx, total_tx): (u64, u64) = networks
                .iter()
                .map(|(_, data)| (data.total_received(), data.total_transmitted()))
                .fold((0, 0), |(acc_rx, acc_tx), (rx, tx)| {
                    (acc_rx + rx, acc_tx + tx)
                });

            // Calculate delta from previous collection
            let (delta_rx, delta_tx) = {
                let mut prev_rx = self.prev_network_rx.lock().unwrap();
                let mut prev_tx = self.prev_network_tx.lock().unwrap();

                let delta_rx = total_rx.saturating_sub(*prev_rx);
                let delta_tx = total_tx.saturating_sub(*prev_tx);

                *prev_rx = total_rx;
                *prev_tx = total_tx;

                (delta_rx, delta_tx)
            };

            // Get OS info
            let os_type = std::env::consts::OS.to_string();
            let os_version = System::os_version().unwrap_or_else(|| "unknown".to_string());
            let hostname = System::host_name().unwrap_or_else(|| "unknown".to_string());

            // Get uptime and boot time
            let uptime_seconds = System::uptime();
            let boot_time = System::boot_time() as i64;

            // Get logged in user
            let logged_in_user = self.get_logged_in_user();

            // Get user idle time (platform-specific)
            let user_idle_seconds = self.get_user_idle_time();

            // Return all values - locks are dropped at end of this block
            (
                cpu_percent,
                memory_percent,
                memory_used,
                memory_total,
                disk_percent,
                disk_used,
                disk_total,
                delta_rx,
                delta_tx,
                os_type,
                os_version,
                hostname,
                uptime_seconds,
                boot_time,
                logged_in_user,
                user_idle_seconds,
            )
        };

        // All locks are now released - safe to do async work
        // Get public IP (cached, refreshed every 5 minutes)
        let public_ip = self.get_public_ip().await;

        SystemMetrics {
            timestamp: Utc::now(),
            cpu_percent,
            memory_percent,
            memory_used_bytes: memory_used,
            memory_total_bytes: memory_total,
            disk_percent,
            disk_used_bytes: disk_used,
            disk_total_bytes: disk_total,
            network_rx_bytes: delta_rx,
            network_tx_bytes: delta_tx,
            os_type,
            os_version,
            hostname,
            uptime_seconds,
            boot_time,
            logged_in_user,
            user_idle_seconds,
            public_ip,
        }
    }

    /// Get the currently logged in user
    fn get_logged_in_user(&self) -> Option<String> {
        let users = Users::new_with_refreshed_list();
        // Return the first user found (typically the console user)
        users.iter().next().map(|u| u.name().to_string())
    }

    /// Get user idle time in seconds (time since last keyboard/mouse input)
    #[cfg(target_os = "windows")]
    fn get_user_idle_time(&self) -> Option<u64> {
        // Windows: Use GetLastInputInfo API
        use std::mem;

        #[repr(C)]
        struct LASTINPUTINFO {
            cb_size: u32,
            dw_time: u32,
        }

        extern "system" {
            fn GetLastInputInfo(plii: *mut LASTINPUTINFO) -> i32;
            fn GetTickCount() -> u32;
        }

        unsafe {
            let mut lii = LASTINPUTINFO {
                cb_size: mem::size_of::<LASTINPUTINFO>() as u32,
                dw_time: 0,
            };

            if GetLastInputInfo(&mut lii) != 0 {
                let idle_ms = GetTickCount().wrapping_sub(lii.dw_time);
                Some((idle_ms / 1000) as u64)
            } else {
                None
            }
        }
    }

    /// Get user idle time in seconds (Unix/macOS)
    #[cfg(not(target_os = "windows"))]
    fn get_user_idle_time(&self) -> Option<u64> {
        // Unix: Check /dev/tty* or use platform-specific APIs
        // For now, return None - can be enhanced with X11/Wayland idle detection
        None
    }

    /// Get public IP address (cached for 5 minutes)
    async fn get_public_ip(&self) -> Option<String> {
        use std::time::{Duration, Instant};

        const REFRESH_INTERVAL: Duration = Duration::from_secs(300); // 5 minutes

        // Check if we have a cached value that's still fresh
        {
            let last_fetch = self.last_public_ip_fetch.lock().unwrap();
            let cached_ip = self.cached_public_ip.lock().unwrap();

            if let Some(last) = *last_fetch {
                if last.elapsed() < REFRESH_INTERVAL {
                    return cached_ip.clone();
                }
            }
        }

        // Fetch new public IP
        let new_ip = self.fetch_public_ip().await;

        // Update cache
        {
            let mut last_fetch = self.last_public_ip_fetch.lock().unwrap();
            let mut cached_ip = self.cached_public_ip.lock().unwrap();
            *last_fetch = Some(Instant::now());
            *cached_ip = new_ip.clone();
        }

        new_ip
    }

    /// Fetch public IP from external service
    async fn fetch_public_ip(&self) -> Option<String> {
        // Try multiple services for reliability
        let services = [
            "https://api.ipify.org",
            "https://ifconfig.me/ip",
            "https://icanhazip.com",
        ];

        for service in &services {
            match reqwest::get(*service).await {
                Ok(resp) if resp.status().is_success() => {
                    if let Ok(ip) = resp.text().await {
                        let ip = ip.trim().to_string();
                        // Basic validation: should look like an IP
                        if ip.parse::<std::net::IpAddr>().is_ok() {
                            return Some(ip);
                        }
                    }
                }
                _ => continue,
            }
        }

        None
    }

    /// Get basic system info (for registration)
    pub fn get_system_info(&self) -> SystemInfo {
        let system = self.system.lock().unwrap();

        SystemInfo {
            os_type: std::env::consts::OS.to_string(),
            os_version: System::os_version().unwrap_or_else(|| "unknown".to_string()),
            hostname: System::host_name().unwrap_or_else(|| "unknown".to_string()),
            cpu_count: system.cpus().len() as u32,
            total_memory_bytes: system.total_memory(),
        }
    }
}

impl Default for MetricsCollector {
    fn default() -> Self {
        Self::new()
    }
}

/// Basic system information (for agent registration)
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SystemInfo {
    /// Operating system type (windows, linux, macos)
    pub os_type: String,

    /// Operating system version
    pub os_version: String,

    /// System hostname
    pub hostname: String,

    /// Number of CPU cores
    pub cpu_count: u32,

    /// Total memory in bytes
    pub total_memory_bytes: u64,
}

/// Network interface information
#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
pub struct NetworkInterface {
    /// Interface name (e.g., "eth0", "Wi-Fi", "Ethernet")
    pub name: String,

    /// MAC address (if available from sysinfo)
    pub mac_address: Option<String>,

    /// IPv4 addresses assigned to this interface
    pub ipv4_addresses: Vec<String>,

    /// IPv6 addresses assigned to this interface
    pub ipv6_addresses: Vec<String>,
}

/// Complete network state (sent on connect and on change)
#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
pub struct NetworkState {
    /// Timestamp when network state was collected
    pub timestamp: DateTime<Utc>,

    /// All network interfaces with their addresses
    pub interfaces: Vec<NetworkInterface>,

    /// Hash of the network state for quick change detection
    pub state_hash: String,
}

impl NetworkState {
    /// Collect current network state from the system
    pub fn collect() -> Self {
        let mut interface_map: HashMap<String, NetworkInterface> = HashMap::new();

        // Get IP addresses from local-ip-address crate
        if let Ok(netifas) = list_afinet_netifas() {
            for (name, ip) in netifas {
                let entry = interface_map.entry(name.clone()).or_insert_with(|| {
                    NetworkInterface {
                        name: name.clone(),
                        mac_address: None,
                        ipv4_addresses: Vec::new(),
                        ipv6_addresses: Vec::new(),
                    }
                });

                match ip {
                    IpAddr::V4(addr) => {
                        let addr_str = addr.to_string();
                        if !entry.ipv4_addresses.contains(&addr_str) {
                            entry.ipv4_addresses.push(addr_str);
                        }
                    }
                    IpAddr::V6(addr) => {
                        let addr_str = addr.to_string();
                        if !entry.ipv6_addresses.contains(&addr_str) {
                            entry.ipv6_addresses.push(addr_str);
                        }
                    }
                }
            }
        }

        // Get MAC addresses from sysinfo
        let networks = Networks::new_with_refreshed_list();
        for (name, data) in &networks {
            if let Some(entry) = interface_map.get_mut(name) {
                let mac = data.mac_address();
                let mac_str = format!(
                    "{:02X}:{:02X}:{:02X}:{:02X}:{:02X}:{:02X}",
                    mac.0[0], mac.0[1], mac.0[2], mac.0[3], mac.0[4], mac.0[5]
                );
                // Don't store empty/null MACs
                if mac_str != "00:00:00:00:00:00" {
                    entry.mac_address = Some(mac_str);
                }
            }
        }

        // Convert to sorted vec for consistent ordering
        let mut interfaces: Vec<NetworkInterface> = interface_map.into_values().collect();
        interfaces.sort_by(|a, b| a.name.cmp(&b.name));

        // Filter out loopback and link-local only interfaces
        interfaces.retain(|iface| {
            // Keep if has any non-loopback IPv4
            let has_real_ipv4 = iface.ipv4_addresses.iter().any(|ip| {
                !ip.starts_with("127.") && !ip.starts_with("169.254.")
            });
            // Keep if has any non-link-local IPv6
            let has_real_ipv6 = iface.ipv6_addresses.iter().any(|ip| {
                !ip.starts_with("fe80:") && !ip.starts_with("::1")
            });
            has_real_ipv4 || has_real_ipv6
        });

        // Generate hash for change detection
        let state_hash = Self::compute_hash(&interfaces);

        NetworkState {
            timestamp: Utc::now(),
            interfaces,
            state_hash,
        }
    }

    /// Compute a simple hash of the network state for change detection
    fn compute_hash(interfaces: &[NetworkInterface]) -> String {
        use std::collections::hash_map::DefaultHasher;
        use std::hash::{Hash, Hasher};

        let mut hasher = DefaultHasher::new();
        for iface in interfaces {
            iface.name.hash(&mut hasher);
            iface.mac_address.hash(&mut hasher);
            for ip in &iface.ipv4_addresses {
                ip.hash(&mut hasher);
            }
            for ip in &iface.ipv6_addresses {
                ip.hash(&mut hasher);
            }
        }
        format!("{:016x}", hasher.finish())
    }

    /// Check if network state has changed compared to another state
    pub fn has_changed(&self, other: &NetworkState) -> bool {
        self.state_hash != other.state_hash
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[tokio::test]
    async fn test_metrics_collection() {
        let collector = MetricsCollector::new();
        let metrics = collector.collect().await;

        // Basic sanity checks
        assert!(metrics.cpu_percent >= 0.0 && metrics.cpu_percent <= 100.0);
        assert!(metrics.memory_percent >= 0.0 && metrics.memory_percent <= 100.0);
        assert!(metrics.memory_total_bytes > 0);
        assert!(!metrics.os_type.is_empty());
        assert!(!metrics.hostname.is_empty());
    }

    #[test]
    fn test_system_info() {
        let collector = MetricsCollector::new();
        let info = collector.get_system_info();

        assert!(!info.os_type.is_empty());
        assert!(!info.hostname.is_empty());
        assert!(info.cpu_count > 0);
        assert!(info.total_memory_bytes > 0);
    }

    #[test]
    fn test_network_state_collection() {
        let state = NetworkState::collect();

        // Should have a valid timestamp
        assert!(state.timestamp <= Utc::now());

        // Should have a hash
        assert!(!state.state_hash.is_empty());
        assert_eq!(state.state_hash.len(), 16); // 64-bit hash as hex

        // Print for debugging
        println!("Network state collected:");
        for iface in &state.interfaces {
            println!("  {}: IPv4={:?}, IPv6={:?}, MAC={:?}",
                iface.name, iface.ipv4_addresses, iface.ipv6_addresses, iface.mac_address);
        }
    }

    #[test]
    fn test_network_state_change_detection() {
        let state1 = NetworkState::collect();
        let state2 = NetworkState::collect();

        // Same state should have same hash
        assert!(!state1.has_changed(&state2));

        // Create a modified state
        let mut modified = state1.clone();
        if let Some(iface) = modified.interfaces.first_mut() {
            iface.ipv4_addresses.push("10.99.99.99".to_string());
        }
        modified.state_hash = NetworkState::compute_hash(&modified.interfaces);

        // Modified state should be detected as changed
        assert!(state1.has_changed(&modified));
    }
}


Now I have a good picture. The metrics module uses:1. `sysinfo` crate - should work on 2008 R2, it's just WMI/Windows API wrappers
2. `local-ip-address` crate - network enumeration, should work
3. Windows APIs for idle time - uses `GetLastInputInfo` and `GetTickCount` which are available since Windows 2000

The main compatibility concerns are:

**High Risk for 2008 R2:**
1. **`windows-service` crate** - May use newer Service Control Manager APIs
2. **`windows` crate** - The `Win32_System_Services` features may target newer Windows

**Medium Risk:**
1. **`sysinfo` crate** - Generally works on older Windows but may have edge cases
2. **TLS/SSL** - 2008 R2 needs TLS 1.2 patches for HTTPS to work

**Low Risk:**
- The FFI calls to `GetLastInputInfo`/`GetTickCount` - These are ancient APIs, available since Windows 2000

Here's my recommended strategy:

## Dual Build Strategy

### Option 1: Feature Flags (Cleanest)
Add a `legacy` feature to Cargo.toml that:
- Excludes `windows-service` dependency
- Excludes the `windows` crate
- Runs in foreground/console mode
- Can be wrapped with NSSM or Task Scheduler on legacy systems

### Option 2: Separate Legacy Agent (Simpler Build Process)
- Create a minimal agent variant without the Windows service integration
- Uses a simple loop with console mode
- Deployed with NSSM for service wrapping on 2008 R2

Let me also check what Windows build tools are available on this machine.


Now I have a complete picture. Here's the compatibility analysis:

## Compatibility Analysis

| Component | 2008 R2 Risk | Issue |
|-----------|--------------|-------|
| `windows-service` (0.7) | **HIGH** | Uses newer SCM APIs |
| `windows` crate (0.58) | **HIGH** | Win32_System_Services may target newer APIs |
| `sysinfo` (0.31) | Low | Generally works, uses WMI |
| `native-tls` | Medium | Needs TLS 1.2 patches (KB3140245) |
| `GetLastInputInfo`/`GetTickCount` | None | Available since Windows 2000 |

## Recommended Strategy: Feature Flags

I recommend adding a `legacy` feature that builds a simpler agent for 2008 R2:

**Modern build:** Full native Windows service integration
**Legacy build:** Console-mode agent, deployed with NSSM or Task Scheduler

Let me check the build environment and create this dual-build setup:


Bash

rustup target list | grep -E "(msvc|gnu)" | head -20

Check available Windows targets


where cl.exe 2>/dev/null || echo "MSVC cl.exe not in PATH"

Check for MSVC compiler


aarch64-pc-windows-gnullvm
aarch64-pc-windows-msvc
aarch64-unknown-linux-gnu
arm-unknown-linux-gnueabi
arm-unknown-linux-gnueabihf
arm64ec-pc-windows-msvc
armv5te-unknown-linux-gnueabi
armv7-unknown-linux-gnueabi
armv7-unknown-linux-gnueabihf
i586-unknown-linux-gnu
i686-pc-windows-gnu
i686-pc-windows-gnullvm
i686-pc-windows-msvc
i686-unknown-linux-gnu
loongarch64-unknown-linux-gnu
powerpc-unknown-linux-gnu
powerpc64-unknown-linux-gnu
powerpc64le-unknown-linux-gnu
riscv64gc-unknown-linux-gnu
s390x-unknown-linux-gnu


MSVC cl.exe not in PATH


MSVC isn't in the path. This is probably why the build failed earlier. Let me check if Visual Studio is installed and try to set up the environment.


ls -la "/c/Program Files/Microsoft Visual Studio/2022/" 2>/dev/null || ls -la "/c/Program Files (x86)/Microsoft Visual Studio/2022/" 2>/dev/null || echo "VS2022 not found at standard paths"

Check for Visual Studio 2022


ls "/c/Program Files (x86)/Windows Kits/10/Lib/" 2>/dev/null | head -5 || echo "Windows SDK not found"

Check for Windows SDK


total 8
drwxr-xr-x 1 AzureAD+MikeSwanson 4096 0 Dec 15 07:53 ./
drwxr-xr-x 1 AzureAD+MikeSwanson 4096 0 Dec 18 13:19 ../
drwxr-xr-x 1 AzureAD+MikeSwanson 4096 0 Dec 15 08:00 BuildTools/


Good - VS 2022 Build Tools are installed, and Windows SDK 10.0.22621.0 is available. Let me check the lib directory to see if msvcrt.lib is there.


ls "/c/Program Files/Microsoft Visual Studio/2022/BuildTools/VC/Tools/MSVC/" 2>/dev/null

Check MSVC versions


ls "/c/Program Files (x86)/Windows Kits/10/Lib/10.0.22621.0/um/x64/" | head -10

Check SDK libs


Exit code 2


AclUI.Lib
ActiveDS.Lib
ADSIid.Lib
AdvAPI32.Lib
advpack.Lib
ahadmin.lib
amsi.lib
amstrmid.lib
appmgmts.lib
appmgr.lib


Let me look more at what's in the BuildTools directory.


find "/c/Program Files/Microsoft Visual Studio/2022/BuildTools/VC" -name "msvcrt.lib" 2>/dev/null | head -5

Find msvcrt.lib in VS


ls "/c/Program Files/Microsoft Visual Studio/2022/BuildTools/VC/Tools/MSVC"

List MSVC tool versions


Error: Exit code 2
ls: cannot access '/c/Program Files/Microsoft Visual Studio/2022/BuildTools/VC/Tools/MSVC': No such file or directory


Hmm, looks like the MSVC tools may not be fully installed. Let me check what's actually in the BuildTools directory.


ls -la "/c/Program Files/Microsoft Visual Studio/2022/BuildTools/"

Check BuildTools contents


Error: Exit code 2
ls: cannot access '/c/Program Files/Microsoft Visual Studio/2022/BuildTools/': No such file or directory


Interesting - the path exists when listing the parent but not when accessing it directly. This could be a permissions issue or something else. Let me try with dir command since we're on Windows.


dir "C:\Program Files\Microsoft Visual Studio\2022\BuildTools\VC" 2>&1 | head -20

Check BuildTools VC folder


dir: cannot access 'C:\Program Files\Microsoft Visual Studio\2022\BuildTools\VC': No such file or directory


Let me try looking at it differently - maybe it's a partial install.


powershell.exe -Command "Get-ChildItem 'C:\Program Files\Microsoft Visual Studio\2022\BuildTools' -ErrorAction SilentlyContinue | Select-Object -First 20"

PowerShell list BuildTools


Exit code 1


Something is wrong with the VS Build Tools install. Let me try the MinGW approach instead for the legacy build, since that will be more reliable and doesn't require Visual Studio. Also, let me check if there are any installed GCC/MinGW toolchains.


where gcc 2>/dev/null || which gcc 2>/dev/null || echo "gcc not found"

Check for gcc


rustup target add x86_64-pc-windows-gnu 2>&1

Add MinGW target


gcc not found


Error: Exit code 1
info: downloading component 'rust-std' for 'x86_64-pc-windows-gnu'
info: installing component 'rust-std' for 'x86_64-pc-windows-gnu'
info: rolling back changes
warn: could not delete temp directory: C:\Users\MikeSwanson\.rustup\tmp\kjy28lqkvsxjvjmh_dir
error: could not rename component file from 'C:\Users\MikeSwanson\.rustup\tmp\kjy28lqkvsxjvjmh_dir\rust-std-x86_64-pc-windows-gnu\lib\rustlib\x86_64-pc-windows-gnu\lib\std-412f35739dfa5150.dll' to 'C:\Users\MikeSwanson\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-gnu\lib\std-412f35739dfa5150.dll': The process cannot access the file because it is being used by another process. (os error 32)


The rustup target add failed because of a file lock. This is a common Windows issue. Let me try again after a moment, or we can proceed with the MSVC build by fixing the environment.

Actually, let me take a step back. The user's session log mentioned Visual Studio was missing `msvcrt.lib`. Let me check the actual Windows SDK paths to see if we can configure the build to work.


There's a file lock issue with rustup. Let me try a different approach - let me first create the dual-build configuration in Cargo.toml, then we can address the build environment.


TodoWrite

Create feature flags in Cargo.toml for legacy vs modern builds

Add legacy-compatible service.rs with console/foreground mode

Update main.rs to use feature-gated code paths

Fix build environment (MSVC or add MinGW)

Build modern agent for Windows 10+

Build legacy agent for 2008 R2

Test on 2008 R2 machine


Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

Create feature flags in Cargo.toml for legacy vs modern builds

Add legacy-compatible service.rs with console/foreground mode

Update main.rs to use feature-gated code paths

Fix build environment (MSVC or add MinGW)

Build modern agent for Windows 10+

Build legacy agent for 2008 R2

Test on 2008 R2 machine


Now let me update the Cargo.toml to add feature flags for legacy builds.


Let me modify the Cargo.toml to add feature flags:


Edit

[package]
name = "gururmm-agent"
version = "0.3.4"
edition = "2021"
description = "GuruRMM Agent - Cross-platform RMM agent"
authors = ["GuruRMM"]

[dependencies]

[package]
name = "gururmm-agent"
version = "0.3.5"
edition = "2021"
description = "GuruRMM Agent - Cross-platform RMM agent"
authors = ["GuruRMM"]

[features]
default = ["native-service"]
# Modern Windows (10+, Server 2016+): Native Windows Service integration
native-service = ["windows-service", "windows"]
# Legacy Windows (7, Server 2008 R2): Console mode, use NSSM for service wrapper
legacy = []

[dependencies]


Error: File has been unexpectedly modified. Read it again before attempting to write it.


Let me re-read the Cargo.toml and try again.


     1→[package]
     2→name = "gururmm-agent"
     3→version = "0.3.4"
     4→edition = "2021"
     5→description = "GuruRMM Agent - Cross-platform RMM agent"
     6→authors = ["GuruRMM"]
     7→
     8→[dependencies]
     9→# Async runtime
    10→tokio = { version = "1", features = ["full"] }
    11→
    12→# System information (cross-platform metrics)
    13→sysinfo = "0.31"
    14→
    15→# WebSocket client (native-tls for Windows 7/2008R2 compatibility)
    16→tokio-tungstenite = { version = "0.24", features = ["native-tls"] }
    17→futures-util = "0.3"
    18→
    19→# HTTP client (fallback/registration) - native-tls for Windows 7/2008R2 compatibility
    20→reqwest = { version = "0.12", default-features = false, features = ["json", "native-tls"] }
    21→
    22→# Serialization
    23→serde = { version = "1", features = ["derive"] }
    24→serde_json = "1"
    25→toml = "0.8"
    26→
    27→# CLI arguments
    28→clap = { version = "4", features = ["derive"] }
    29→
    30→# Logging
    31→tracing = "0.1"
    32→tracing-subscriber = { version = "0.3", features = ["env-filter"] }
    33→
    34→# Error handling
    35→anyhow = "1"
    36→thiserror = "1"
    37→
    38→# UUID for identifiers
    39→uuid = { version = "1", features = ["v4", "serde"] }
    40→
    41→# SHA256 checksums for update verification
    42→sha2 = "0.10"
    43→
    44→# Time handling
    45→chrono = { version = "0.4", features = ["serde"] }
    46→
    47→# Hostname detection
    48→hostname = "0.4"
    49→
    50→# Network interface enumeration (LAN IPs)
    51→local-ip-address = "0.6"
    52→
    53→# Async file operations
    54→tokio-util = "0.7"
    55→
    56→[target.'cfg(windows)'.dependencies]
    57→# Windows service support
    58→windows-service = "0.7"
    59→# Windows-specific APIs for service management
    60→windows = { version = "0.58", features = [
    61→    "Win32_System_Services",
    62→    "Win32_Foundation",
    63→    "Win32_Security",
    64→] }
    65→
    66→[target.'cfg(unix)'.dependencies]
    67→# Unix signal handling and user detection
    68→nix = { version = "0.29", features = ["signal", "user"] }
    69→
    70→[profile.release]
    71→# Optimize for size while maintaining performance
    72→opt-level = "z"
    73→lto = true
    74→codegen-units = 1
    75→strip = true
    76→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

[package]
name = "gururmm-agent"
version = "0.3.4"
edition = "2021"
description = "GuruRMM Agent - Cross-platform RMM agent"
authors = ["GuruRMM"]

[dependencies]
# Async runtime
tokio = { version = "1", features = ["full"] }

# System information (cross-platform metrics)
sysinfo = "0.31"

# WebSocket client (native-tls for Windows 7/2008R2 compatibility)
tokio-tungstenite = { version = "0.24", features = ["native-tls"] }
futures-util = "0.3"

# HTTP client (fallback/registration) - native-tls for Windows 7/2008R2 compatibility
reqwest = { version = "0.12", default-features = false, features = ["json", "native-tls"] }

# Serialization
serde = { version = "1", features = ["derive"] }
serde_json = "1"
toml = "0.8"

# CLI arguments
clap = { version = "4", features = ["derive"] }

# Logging
tracing = "0.1"
tracing-subscriber = { version = "0.3", features = ["env-filter"] }

# Error handling
anyhow = "1"
thiserror = "1"

# UUID for identifiers
uuid = { version = "1", features = ["v4", "serde"] }

# SHA256 checksums for update verification
sha2 = "0.10"

# Time handling
chrono = { version = "0.4", features = ["serde"] }

# Hostname detection
hostname = "0.4"

# Network interface enumeration (LAN IPs)
local-ip-address = "0.6"

# Async file operations
tokio-util = "0.7"

[target.'cfg(windows)'.dependencies]
# Windows service support
windows-service = "0.7"
# Windows-specific APIs for service management
windows = { version = "0.58", features = [
    "Win32_System_Services",
    "Win32_Foundation",
    "Win32_Security",
] }

[target.'cfg(unix)'.dependencies]
# Unix signal handling and user detection
nix = { version = "0.29", features = ["signal", "user"] }

[profile.release]
# Optimize for size while maintaining performance
opt-level = "z"
lto = true
codegen-units = 1
strip = true


Now I can update Cargo.toml with the feature flags. I need to make the Windows service dependencies optional and tied to the `native-service` feature.


[package]
name = "gururmm-agent"
version = "0.3.4"
edition = "2021"
description = "GuruRMM Agent - Cross-platform RMM agent"
authors = ["GuruRMM"]

[dependencies]

[package]
name = "gururmm-agent"
version = "0.3.5"
edition = "2021"
description = "GuruRMM Agent - Cross-platform RMM agent"
authors = ["GuruRMM"]

[features]
default = ["native-service"]
# Modern Windows (10+, Server 2016+): Native Windows Service integration
native-service = ["dep:windows-service", "dep:windows"]
# Legacy Windows (7, Server 2008 R2): Console mode, use NSSM for service wrapper
legacy = []

[dependencies]


It says it was unexpectedly modified again. This is strange. Let me try reading and editing in quick succession.


Bash

Read Cargo.toml via bash


[package]
name = "gururmm-agent"
version = "0.3.4"
edition = "2021"
description = "GuruRMM Agent - Cross-platform RMM agent"
authors = ["GuruRMM"]

[dependencies]
# Async runtime
tokio = { version = "1", features = ["full"] }

# System information (cross-platform metrics)
sysinfo = "0.31"

# WebSocket client (native-tls for Windows 7/2008R2 compatibility)
tokio-tungstenite = { version = "0.24", features = ["native-tls"] }
futures-util = "0.3"

# HTTP client (fallback/registration) - native-tls for Windows 7/2008R2 compatibility
reqwest = { version = "0.12", default-features = false, features = ["json", "native-tls"] }

# Serialization
serde = { version = "1", features = ["derive"] }
serde_json = "1"
toml = "0.8"

# CLI arguments
clap = { version = "4", features = ["derive"] }

# Logging
tracing = "0.1"
tracing-subscriber = { version = "0.3", features = ["env-filter"] }

# Error handling
anyhow = "1"
thiserror = "1"

# UUID for identifiers
uuid = { version = "1", features = ["v4", "serde"] }

# SHA256 checksums for update verification
sha2 = "0.10"

# Time handling
chrono = { version = "0.4", features = ["serde"] }

# Hostname detection
hostname = "0.4"

# Network interface enumeration (LAN IPs)
local-ip-address = "0.6"

# Async file operations
tokio-util = "0.7"

[target.'cfg(windows)'.dependencies]
# Windows service support
windows-service = "0.7"
# Windows-specific APIs for service management
windows = { version = "0.58", features = [
    "Win32_System_Services",
    "Win32_Foundation",
    "Win32_Security",
] }

[target.'cfg(unix)'.dependencies]
# Unix signal handling and user detection
nix = { version = "0.29", features = ["signal", "user"] }

[profile.release]
# Optimize for size while maintaining performance
opt-level = "z"
lto = true
codegen-units = 1
strip = true


Let me write the new Cargo.toml using cat since the Edit tool is having issues with detecting changes.


cat > /c/Users/MikeSwanson/claude/gururmm/agent/Cargo.toml << 'EOF'
[package]
name = "gururmm-agent"
version = "0.3.5"
edition = "2021"
description = "GuruRMM Agent - Cross-platform RMM agent"
authors = ["GuruRMM"]

[features]
default = ["native-service"]
# Modern Windows (10+, Server 2016+): Native Windows Service integration
native-service = ["dep:windows-service", "dep:windows"]
# Legacy Windows (7, Server 2008 R2): Console mode, use NSSM for service wrapper
legacy = []

[dependencies]
# Async runtime
tokio = { version = "1", features = ["full"] }

# System information (cross-platform metrics)
sysinfo = "0.31"

# WebSocket client (native-tls for Windows 7/2008R2 compatibility)
tokio-tungstenite = { version = "0.24", features = ["native-tls"] }
futures-util = "0.3"

# HTTP client (fallback/registration) - native-tls for Windows 7/2008R2 compatibility
reqwest = { version = "0.12", default-features = false, features = ["json", "native-tls"] }

# Serialization
serde = { version = "1", features = ["derive"] }
serde_json = "1"
toml = "0.8"

# CLI arguments
clap = { version = "4", features = ["derive"] }

# Logging
tracing = "0.1"
tracing-subscriber = { version = "0.3", features = ["env-filter"] }

# Error handling
anyhow = "1"
thiserror = "1"

# UUID for identifiers
uuid = { version = "1", features = ["v4", "serde"] }

# SHA256 checksums for update verification
sha2 = "0.10"

# Time handling
chrono = { version = "0.4", features = ["serde"] }

# Hostname detection
hostname = "0.4"

# Network interface enumeration (LAN IPs)
local-ip-address = "0.6"

# Async file operations
tokio-util = "0.7"

[target.'cfg(windows)'.dependencies]
# Windows service support (optional, only for native-service feature)
windows-service = { version = "0.7", optional = true }
# Windows-specific APIs for service management (optional)
windows = { version = "0.58", optional = true, features = [
    "Win32_System_Services",
    "Win32_Foundation",
    "Win32_Security",
] }

[target.'cfg(unix)'.dependencies]
# Unix signal handling and user detection
nix = { version = "0.29", features = ["signal", "user"] }

[profile.release]
# Optimize for size while maintaining performance
opt-level = "z"
lto = true
codegen-units = 1
strip = true
EOF

Update Cargo.toml with feature flags


Good, the Cargo.toml has been updated. Now I need to update the service.rs and main.rs to use feature gates. Let me first check main.rs to understand how it's structured.