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use ::pnet::datalink::Channel::Ethernet;
use ::pnet::datalink::DataLinkReceiver;
use ::pnet::datalink::{self, Config, NetworkInterface};
use ::std::io::{self, stdin, Write};
use ::termion::event::Event;
use ::termion::input::TermRead;
use ::std::collections::HashMap;
use ::std::net::IpAddr;
use std::process::Command;
use regex::{Regex};
use signal_hook::iterator::Signals;
use crate::network::{Connection, Protocol};
use crate::OsInputOutput;
use std::net::{SocketAddr};
struct KeyboardEvents;
impl Iterator for KeyboardEvents {
type Item = Event;
fn next(&mut self) -> Option<Event> {
match stdin().events().next() {
Some(Ok(ev)) => Some(ev),
_ => None,
}
}
}
fn get_datalink_channel(
interface: &NetworkInterface,
) -> Result<Box<dyn DataLinkReceiver>, failure::Error> {
match datalink::channel(interface, Config::default()) {
Ok(Ethernet(_tx, rx)) => Ok(rx),
Ok(_) => failure::bail!("Unknown interface type"),
Err(e) => failure::bail!("Failed to listen to network interface: {}", e),
}
}
fn get_interface(interface_name: &str) -> Option<NetworkInterface> {
datalink::interfaces()
.into_iter()
.find(|iface| iface.name == interface_name)
}
#[derive(Debug)]
struct RawConnection {
ip: String,
local_port: String,
remote_port: String,
protocol: String,
process_name: String,
}
fn get_open_sockets() -> HashMap<Connection, String> {
let mut open_sockets = HashMap::new();
let output = Command::new("lsof")
.args(&["-n","-P", "-i4"])//"4tcp"
.output()
.expect("failed to execute process");
let regex = Regex::new(r"([^\s]+).*(TCP|UDP).*:(.*)->(.*):(\d*)(\s|$)").unwrap();
let output_string = String::from_utf8(output.stdout).unwrap();
let lines = output_string.lines();
for line in lines {
let raw_connection_iter = regex.captures_iter(line).filter_map(|cap| {
let process_name = String::from(cap.get(1).unwrap().as_str());
let protocol = String::from(cap.get(2).unwrap().as_str());
let local_port = String::from(cap.get(3).unwrap().as_str());
let ip = String::from(cap.get(4).unwrap().as_str());
let remote_port = String::from(cap.get(5).unwrap().as_str());
let connection = RawConnection{process_name, ip,local_port, remote_port, protocol};
Some(connection)
});
let raw_connection_vec = raw_connection_iter.map(|m| m).collect::<Vec<_>>();
if let Some(raw_connection) = raw_connection_vec.first() {
let protocol = Protocol::from_string(&raw_connection.protocol).unwrap();
let ip_address = IpAddr::V4(raw_connection.ip.parse().unwrap());
let remote_port = raw_connection.remote_port.parse::<u16>().unwrap();
let local_port = raw_connection.local_port.parse::<u16>().unwrap();
let socket_addr = SocketAddr::new(ip_address, remote_port);
let connection = Connection::new(socket_addr, local_port, protocol).unwrap();
open_sockets.insert(connection, raw_connection.process_name.clone());
}
}
return open_sockets;
}
fn lookup_addr(ip: &IpAddr) -> Option<String> {
::dns_lookup::lookup_addr(ip).ok()
}
fn sigwinch() -> (Box<dyn Fn(Box<dyn Fn()>) + Send>, Box<dyn Fn() + Send>) {
let signals = Signals::new(&[signal_hook::SIGWINCH]).unwrap();
let on_winch = {
let signals = signals.clone();
move |cb: Box<dyn Fn()>| {
for signal in signals.forever() {
match signal {
signal_hook::SIGWINCH => cb(),
_ => unreachable!(),
}
}
}
};
let cleanup = move || {
signals.close();
};
(Box::new(on_winch), Box::new(cleanup))
}
pub fn create_write_to_stdout() -> Box<dyn FnMut(String) + Send> {
Box::new({
let mut stdout = io::stdout();
move |output: String| {
writeln!(stdout, "{}", output).unwrap();
}
})
}
pub fn get_input(interface_name: &str) -> Result<OsInputOutput, failure::Error> {
let keyboard_events = Box::new(KeyboardEvents);
let network_interface = match get_interface(interface_name) {
Some(interface) => interface,
None => {
failure::bail!("Cannot find interface {}", interface_name);
}
};
let network_frames = get_datalink_channel(&network_interface)?;
let lookup_addr = Box::new(lookup_addr);
let write_to_stdout = create_write_to_stdout();
let (on_winch, cleanup) = sigwinch();
Ok(OsInputOutput {
network_interface,
network_frames,
get_open_sockets,
keyboard_events,
lookup_addr,
on_winch,
cleanup,
write_to_stdout,
})
}
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