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|
mod display;
mod network;
mod os;
#[cfg(test)]
mod tests;
use display::display_loop;
use network::{resolve_connections, Connection, DnsQueue, Sniffer, Utilization};
use ::std::net::IpAddr;
use ::pnet::datalink::{DataLinkReceiver, NetworkInterface};
use ::std::collections::HashMap;
use ::std::sync::atomic::{AtomicBool, Ordering};
use ::std::sync::{Arc, Mutex};
use ::std::{thread, time};
use ::termion::event::{Event, Key};
use ::tui::backend::Backend;
use ::tui::Terminal;
use ::std::io;
use ::termion::raw::IntoRawMode;
use ::tui::backend::TermionBackend;
use structopt::StructOpt;
#[derive(StructOpt, Debug)]
#[structopt(name = "what")]
struct Opt {
#[structopt(short, long)]
interface: String,
}
fn main() {
#[cfg(not(target_os = "linux"))]
compile_error!(
"Sorry, no implementations for platforms other than linux yet :( - PRs welcome!"
);
use os::{get_datalink_channel, get_interface, get_open_sockets, lookup_addr, KeyboardEvents};
let opt = Opt::from_args();
let stdout = io::stdout().into_raw_mode().unwrap();
let terminal_backend = TermionBackend::new(stdout);
let keyboard_events = Box::new(KeyboardEvents);
let network_interface = get_interface(&opt.interface).unwrap();
let network_frames = get_datalink_channel(&network_interface);
let lookup_addr = Box::new(lookup_addr);
let os_input = OsInput {
network_interface,
network_frames,
get_open_sockets,
keyboard_events,
lookup_addr,
};
start(terminal_backend, os_input)
}
pub struct OsInput {
pub network_interface: NetworkInterface,
pub network_frames: Box<DataLinkReceiver>,
pub get_open_sockets: fn() -> HashMap<Connection, String>,
pub keyboard_events: Box<Iterator<Item = Event> + Send + Sync + 'static>,
pub lookup_addr: Box<Fn(&IpAddr) -> Option<String> + Send + Sync + 'static>,
}
pub fn start<B>(terminal_backend: B, os_input: OsInput)
where
B: Backend + Send + 'static,
{
let running = Arc::new(AtomicBool::new(true));
let keyboard_events = os_input.keyboard_events; // TODO: as methods in os_interface
let get_open_sockets = os_input.get_open_sockets;
let lookup_addr = os_input.lookup_addr;
let stdin_handler = thread::spawn({
let running = running.clone();
move || {
for evt in keyboard_events {
match evt {
Event::Key(Key::Ctrl('c')) | Event::Key(Key::Char('q')) => {
// TODO: exit faster
running.store(false, Ordering::Relaxed);
break;
}
_ => (),
};
}
}
});
let mut sniffer = Sniffer::new(os_input.network_interface, os_input.network_frames);
let network_utilization = Arc::new(Mutex::new(Utilization::new()));
let dns_queue = Arc::new(DnsQueue::new());
let ip_to_host = Arc::new(Mutex::new(HashMap::new()));
let dns_handler = thread::spawn({
let running = running.clone();
let dns_queue = dns_queue.clone();
let ip_to_host = ip_to_host.clone();
move || {
while running.load(Ordering::Relaxed) {
let jobs = dns_queue.wait_for_jobs();
for ip in jobs {
if let Some(addr) = lookup_addr(&IpAddr::V4(ip.clone())) {
ip_to_host.lock().unwrap().insert(ip, addr);
}
}
}
}
});
let display_handler = thread::spawn({
let running = running.clone();
let network_utilization = network_utilization.clone();
let ip_to_host = ip_to_host.clone();
let dns_queue = dns_queue.clone();
move || {
let mut terminal = Terminal::new(terminal_backend).unwrap();
terminal.clear().unwrap();
terminal.hide_cursor().unwrap();
while running.load(Ordering::Relaxed) {
let connections_to_procs = {
let open_sockets = get_open_sockets();
let ip_to_host = ip_to_host.lock().unwrap();
let (unresolved_ips, connections_to_procs) =
resolve_connections(open_sockets, &ip_to_host);
dns_queue.add_ips_to_resolve(unresolved_ips);
connections_to_procs
};
{
let mut network_utilization = network_utilization.lock().unwrap();
let utilization = network_utilization.clone_and_reset();
display_loop(&utilization, &mut terminal, connections_to_procs);
}
thread::sleep(time::Duration::from_secs(1));
}
terminal.clear().unwrap();
terminal.show_cursor().unwrap();
dns_queue.end();
}
});
let sniffing_handler = thread::spawn(move || {
while running.load(Ordering::Relaxed) {
if let Some(segment) = sniffer.next() {
network_utilization.lock().unwrap().update(&segment)
}
}
});
display_handler.join().unwrap();
sniffing_handler.join().unwrap();
stdin_handler.join().unwrap();
dns_handler.join().unwrap();
}
|
