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|
mod display;
mod network;
mod os;
#[cfg(test)]
mod tests;
use display::Ui;
use network::{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::park_timeout;
use ::std::{thread, time};
use ::termion::event::{Event, Key};
use ::tui::backend::Backend;
use std::process;
use ::std::io;
use ::termion::raw::IntoRawMode;
use ::tui::backend::TermionBackend;
use structopt::StructOpt;
#[derive(StructOpt, Debug)]
#[structopt(name = "what")]
pub struct Opt {
#[structopt(short, long)]
interface: String,
}
fn main() {
if let Err(err) = try_main() {
eprintln!("Error: {}", err);
process::exit(2);
}
}
fn try_main() -> Result<(), failure::Error> {
#[cfg(not(target_os = "linux"))]
compile_error!(
"Sorry, no implementations for platforms other than linux yet :( - PRs welcome!"
);
use os::get_input;
let opt = Opt::from_args();
let os_input = get_input(opt)?;
let stdout = match io::stdout().into_raw_mode() {
Ok(stdout) => stdout,
Err(_) => failure::bail!(
"Failed to get stdout: 'what' does not (yet) support piping, is it being piped?"
),
};
let terminal_backend = TermionBackend::new(stdout);
start(terminal_backend, os_input);
Ok(())
}
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>,
pub lookup_addr: Box<Fn(&IpAddr) -> Option<String> + Send>,
pub on_winch: Box<Fn(Box<Fn()>) + Send>,
pub cleanup: Box<Fn() + Send>,
}
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;
let get_open_sockets = os_input.get_open_sockets;
let lookup_addr = os_input.lookup_addr;
let on_winch = os_input.on_winch;
let cleanup = os_input.cleanup;
let mut sniffer = Sniffer::new(os_input.network_interface, os_input.network_frames);
let network_utilization = Arc::new(Mutex::new(Utilization::new()));
let ui = Arc::new(Mutex::new(Ui::new(terminal_backend)));
let dns_queue = Arc::new(DnsQueue::new());
let ip_to_host = Arc::new(Mutex::new(HashMap::new()));
let dns_handler = thread::spawn({
let dns_queue = dns_queue.clone();
let ip_to_host = ip_to_host.clone();
move || {
while let Some(ip) = dns_queue.wait_for_job() {
if let Some(addr) = lookup_addr(&IpAddr::V4(ip)) {
ip_to_host.lock().unwrap().insert(ip, addr);
}
}
}
});
let resize_handler = thread::spawn({
let ui = ui.clone();
move || {
on_winch({
Box::new(move || {
let mut ui = ui.lock().unwrap();
ui.draw();
})
});
}
});
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();
let ui = ui.clone();
move || {
while running.load(Ordering::Acquire) {
let connections_to_procs = get_open_sockets();
let ip_to_host = { ip_to_host.lock().unwrap().clone() };
let utilization = {
let mut network_utilization = network_utilization.lock().unwrap();
network_utilization.clone_and_reset()
};
dns_queue.find_ips_to_resolve(&connections_to_procs, &ip_to_host);
{
let mut ui = ui.lock().unwrap();
ui.update_state(connections_to_procs, utilization, ip_to_host);
ui.draw();
}
park_timeout(time::Duration::from_secs(1));
}
let mut ui = ui.lock().unwrap();
ui.end();
dns_queue.end();
}
});
let stdin_handler = thread::spawn({
let running = running.clone();
let display_handler = display_handler.thread().clone();
move || {
for evt in keyboard_events {
match evt {
Event::Key(Key::Ctrl('c')) | Event::Key(Key::Char('q')) => {
running.store(false, Ordering::Release);
cleanup();
display_handler.unpark();
break;
}
_ => (),
};
}
}
});
let sniffing_handler = thread::spawn(move || {
while running.load(Ordering::Acquire) {
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();
resize_handler.join().unwrap();
}
|
