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use crate::network::Protocol;
use lazy_static::lazy_static;
use regex::Regex;
use std::ffi::OsStr;
use std::net::IpAddr;
use std::process::Command;
#[derive(Debug, Clone)]
pub struct RawConnection {
ip: String,
local_port: String,
remote_port: String,
protocol: String,
pub process_name: String,
}
lazy_static! {
static ref CONNECTION_REGEX: Regex =
Regex::new(r"([^\s]+).*(TCP|UDP).*:(.*)->(.*):(\d*)(\s|$)").unwrap();
}
impl RawConnection {
pub fn new(raw_line: &str) -> Option<RawConnection> {
let raw_connection_iter = CONNECTION_REGEX.captures_iter(raw_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 raw_connection_vec.is_empty() {
None
} else {
Some(raw_connection_vec[0].clone())
}
}
pub fn get_protocol(&self) -> Protocol {
return Protocol::from_str(&self.protocol).unwrap();
}
pub fn get_ip_address(&self) -> IpAddr {
return IpAddr::V4(self.ip.parse().unwrap());
}
pub fn get_remote_port(&self) -> u16 {
return self.remote_port.parse::<u16>().unwrap();
}
pub fn get_local_port(&self) -> u16 {
return self.local_port.parse::<u16>().unwrap();
}
}
pub fn get_connections<'a>() -> RawConnections {
let content = run(&["-n", "-P", "-i4"]);
RawConnections::new(content)
}
fn run<'a, I, S>(args: I) -> String
where
I: IntoIterator<Item = S>,
S: AsRef<OsStr>,
{
let output = Command::new("lsof")
.args(args)
.output()
.expect("failed to execute process");
String::from_utf8(output.stdout).unwrap()
}
pub struct RawConnections {
content: Vec<RawConnection>,
}
impl RawConnections {
pub fn new(content: String) -> RawConnections {
let lines: Vec<RawConnection> = content
.lines()
.flat_map(|string| RawConnection::new(string))
.collect();
RawConnections { content: lines }
}
}
impl Iterator for RawConnections {
type Item = RawConnection;
fn next(&mut self) -> Option<Self::Item> {
self.content.pop()
}
}
#[cfg(test)]
mod tests {
use super::*;
const LINE_RAW_OUTPUT: &str = "ProcessName 29266 user 39u IPv4 0x28ffb9c0021196bf 0t0 UDP 192.168.0.1:1111->198.252.206.25:2222";
const FULL_RAW_OUTPUT: &str = r#"
com.apple 590 etoledom 193u IPv4 0x28ffb9c041115627 0t0 TCP 192.168.1.37:60298->31.13.83.36:443 (ESTABLISHED)
com.apple 590 etoledom 198u IPv4 0x28ffb9c04110ea8f 0t0 TCP 192.168.1.37:60299->31.13.83.8:443 (ESTABLISHED)
com.apple 590 etoledom 203u IPv4 0x28ffb9c04110ea8f 0t0 TCP 192.168.1.37:60299->31.13.83.8:443 (ESTABLISHED)
com.apple 590 etoledom 204u IPv4 0x28ffb9c04111253f 0t0 TCP 192.168.1.37:60374->140.82.114.26:443
"#;
#[test]
fn test_iterator_multiline() {
let iterator = RawConnections::new(String::from(FULL_RAW_OUTPUT));
let connections: Vec<RawConnection> = iterator.collect();
assert_eq!(connections.len(), 4);
}
#[test]
fn test_iterator() {
let iterator = RawConnections::new(String::from(LINE_RAW_OUTPUT));
let mut worked = false;
for raw_connection in iterator {
worked = true;
assert_eq!(raw_connection.process_name, String::from("ProcessName"));
}
assert!(worked);
}
#[test]
fn test_raw_connection_is_created_from_raw_output() {
let connection = RawConnection::new(LINE_RAW_OUTPUT);
assert!(connection.is_some());
}
#[test]
fn test_raw_connection_is_not_created_from_wrong_raw_output() {
let connection = RawConnection::new("not a process");
assert!(connection.is_none());
}
#[test]
fn test_raw_connection_parse_remote_port() {
let connection = RawConnection::new(LINE_RAW_OUTPUT).unwrap();
assert_eq!(connection.get_remote_port(), 2222);
}
#[test]
fn test_raw_connection_parse_local_port() {
let connection = RawConnection::new(LINE_RAW_OUTPUT).unwrap();
assert_eq!(connection.get_local_port(), 1111);
}
#[test]
fn test_raw_connection_parse_ip_address() {
let connection = RawConnection::new(LINE_RAW_OUTPUT).unwrap();
assert_eq!(
connection.get_ip_address().to_string(),
String::from("198.252.206.25")
);
}
#[test]
fn test_raw_connection_parse_protocol() {
let connection = RawConnection::new(LINE_RAW_OUTPUT).unwrap();
assert_eq!(connection.get_protocol(), Protocol::Udp);
}
#[test]
fn test_raw_connection_parse_process_name() {
let connection = RawConnection::new(LINE_RAW_OUTPUT).unwrap();
assert_eq!(connection.process_name, String::from("ProcessName"));
}
}
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