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theopfr
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10
Cargo.toml Normal file
View File

@@ -0,0 +1,10 @@
[package]
name = "port-checker"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
procfs = "0.15.1"
termimad = "0.20"

145
src/main.rs Normal file
View File

@@ -0,0 +1,145 @@
use procfs;
use procfs::process::FDTarget;
use procfs::process::Stat;
use std::collections::HashMap;
use termimad::crossterm::style::{Attribute::*, Color::*};
use termimad::*;
mod string_utils;
fn get_processes() -> HashMap<u64, Stat> {
/* gets all running processes on the system */
let all_procs = procfs::process::all_processes().unwrap();
let mut map: HashMap<u64, Stat> = HashMap::new();
for p in all_procs {
let process = p.unwrap();
if let (Ok(stat), Ok(fds)) = (process.stat(), process.fd()) {
for fd in fds {
if let FDTarget::Socket(inode) = fd.unwrap().target {
map.insert(inode, stat.clone());
}
}
}
}
return map;
}
fn check_known_ip(remote_ip: String) -> String {
/* check if an IP corresponds to a DNS server */
if remote_ip == "0.0.0.0" || remote_ip == "[::]" {
return format!("{} *unspecified*", remote_ip);
}
else if remote_ip == "127.0.0.1" || remote_ip == "[::1]" {
return format!("{} *localhost*", remote_ip);
}
return remote_ip;
}
fn check_malicious(remote_ip: &String) -> (bool, i16) {
/* check if an IP corresponds to a DNS server */
let mut malicious: bool = false;
let mut checked_ip_status: i16 = 0;
if remote_ip == "185.230.162.220" {
malicious = true;
checked_ip_status = 1;
}
return (malicious, checked_ip_status);
}
fn main() {
// get running processes
let process_map = get_processes();
// initialize and customize termimad environment to create a nice looking table
let mut skin = MadSkin::default();
skin.bold.set_fg(Green);
skin.italic.set_fg(gray(11));
skin.strikeout.set_fg(Red);
skin.paragraph.align = Alignment::Left;
skin.table.align = Alignment::Left;
let (width, _) = terminal_size();
static CENTER_MARKDOWN_ROW: &str = "| :-: | :-: | :-: | :-: | :-: |\n";
// add table headers
let mut markdown = format!("\nConnections: **{}**\n", width);
markdown.push_str(CENTER_MARKDOWN_ROW);
markdown.push_str("| **local port** | **remote address** | **remote port** | **program***/pid* | **state** |\n");
// get all TCP connections
let tcp = procfs::net::tcp().unwrap();
let tcp6 = procfs::net::tcp6().unwrap();
// get all UDP connections
let udp = procfs::net::udp().unwrap();
let udp6 = procfs::net::udp6().unwrap();
let mut checked_ip_status: i16 = 0;
// iterate over all connections to build the table
for entry in udp.into_iter().chain(udp6) {
markdown.push_str(CENTER_MARKDOWN_ROW);
// split <ip>:<port>
let (_, local_port) = string_utils::get_address_parts(&format!("{}", entry.local_address));
let (mut remote_ip, remote_port) = string_utils::get_address_parts(&format!("{}", entry.remote_address));
let state = format!("{:?}", entry.state).to_ascii_lowercase();
// check if the remote IP is a DNS server
remote_ip = check_known_ip(remote_ip);
// check if the remote IP is malicious using the AbuseIpDb API
let (is_malicious, checked) = check_malicious(&remote_ip);
if is_malicious {
remote_ip = format!("{} ~~A~~ malicious", remote_ip)
}
checked_ip_status = checked;
// add row with connection information
if let Some(stat) = process_map.get(&entry.inode) {
markdown.push_str(&format!(
"| {} | {} | {} | {}*/{}* | {} |\n",
local_port, remote_ip, remote_port, stat.comm, stat.pid, state
));
} else {
markdown.push_str(&format!(
"| {} | {} | {} | *-/-* | {} |\n",
local_port, remote_ip, remote_port, state
));
}
}
// add a row that forces the table to fill the terminal width
let empty_character: String = string_utils::str_from_bytes(&[0xE2, 0xA0, 0x80]);
let spacing = empty_character.repeat(usize::from(width - 6) / 5);
markdown.push_str(CENTER_MARKDOWN_ROW);
markdown.push_str(&format!(
"| {} | {} | {} | {} | {} |\n",
spacing, spacing, spacing, spacing, spacing
));
// print information about checking malicious IPs
if checked_ip_status == 1 {
markdown.push_str("\n*Successfully checked remote IPs with the AbuseIpDB API.*\n");
}
else if checked_ip_status == 0 {
markdown.push_str("\n~~A~~ *If you want SRC to automatically check for malicious IP addresses in your connections, go make an account at `www.abuseipdb.com`.*\n");
markdown.push_str("*Then add your API key as an env variable: `ABUSEIPDB_API_KEY={your-api-key}.`*\n");
}
else if checked_ip_status == -1 {
markdown.push_str("\n~~A~~ *Couldn't reach the AbuseIpDB API to check for malicious IP address in your connections.*\n");
markdown.push_str("*Possible problems:*\n");
markdown.push_str("*1. API down or new non-backward compatible changes -> check if there is a new version of SRC avaialble *\n");
markdown.push_str("*2. wrong or expired API key stored in the `ABUSEIPDB_API_KEY` env variable *\n");
}
println!("{}\n", skin.term_text(&markdown));
}

33
src/string_utils.rs Normal file
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@@ -0,0 +1,33 @@
pub fn split_address(address: &str) -> Option<(&str, &str)> {
static DELIMITER: &str = ":";
let mut address_parts = address.rsplitn(2, DELIMITER);
match (address_parts.next(), address_parts.next()) {
(Some(first), Some(second)) => Some((second, first)),
_ => None,
}
}
pub fn get_address_parts(address: &str) -> (String, String) {
// split remote address and port
let remote_address: String;
let remote_port: String;
if let Some((part1, part2)) = split_address(&address) {
remote_address = String::from(part1);
remote_port = String::from(part2);
} else {
remote_address = String::from(address);
remote_port = "-".to_string();
}
return (remote_address, remote_port);
}
pub fn str_from_bytes(char_bytes: &[u8]) -> String {
let s = std::str::from_utf8(&char_bytes).expect("Invalid UTF-8 sequence");
return s.chars().next().expect("Empty string").to_string();
}