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| 1 | +use std::{ |
| 2 | + collections::HashMap, |
| 3 | + net::IpAddr, |
| 4 | + sync::{atomic::AtomicBool, Arc, Mutex}, |
| 5 | + thread, |
| 6 | + time::Duration, |
| 7 | +}; |
| 8 | + |
| 9 | +use ratatui::{ |
| 10 | + layout::{Alignment, Constraint, Flex, Rect}, |
| 11 | + style::{Style, Stylize}, |
| 12 | + text::Line, |
| 13 | + widgets::{Block, Borders, Row, Table}, |
| 14 | + Frame, |
| 15 | +}; |
| 16 | + |
| 17 | +use crate::packets::{ |
| 18 | + network::{IpPacket, IpProto}, |
| 19 | + packet::AppPacket, |
| 20 | +}; |
| 21 | + |
| 22 | +const WIN_SIZE: usize = 100_000; |
| 23 | + |
| 24 | +#[derive(Debug)] |
| 25 | +pub struct SynFlood { |
| 26 | + pub detected: Arc<AtomicBool>, |
| 27 | + pub map: Arc<Mutex<HashMap<IpAddr, usize>>>, |
| 28 | +} |
| 29 | + |
| 30 | +impl SynFlood { |
| 31 | + pub fn new(packets: Arc<Mutex<Vec<AppPacket>>>) -> Self { |
| 32 | + let map: Arc<Mutex<HashMap<IpAddr, usize>>> = Arc::new(Mutex::new(HashMap::new())); |
| 33 | + |
| 34 | + let detected = Arc::new(AtomicBool::new(false)); |
| 35 | + |
| 36 | + thread::spawn({ |
| 37 | + let packets = packets.clone(); |
| 38 | + let map = map.clone(); |
| 39 | + let detected = detected.clone(); |
| 40 | + move || loop { |
| 41 | + let start_index = { |
| 42 | + let packets = packets.lock().unwrap(); |
| 43 | + packets.len().saturating_sub(1) |
| 44 | + }; |
| 45 | + thread::sleep(Duration::from_secs(5)); |
| 46 | + let app_packets = { |
| 47 | + let packets = packets.lock().unwrap(); |
| 48 | + packets.clone() |
| 49 | + }; |
| 50 | + |
| 51 | + let mut map = map.lock().unwrap(); |
| 52 | + map.clear(); |
| 53 | + |
| 54 | + if app_packets.len() < WIN_SIZE { |
| 55 | + continue; |
| 56 | + } |
| 57 | + |
| 58 | + let mut nb_syn_packets = 0; |
| 59 | + |
| 60 | + app_packets[start_index..app_packets.len().saturating_sub(1)] |
| 61 | + .iter() |
| 62 | + .for_each(|packet| { |
| 63 | + if let AppPacket::Ip(ip_packet) = packet { |
| 64 | + if let IpPacket::V4(ipv4_packet) = ip_packet { |
| 65 | + if let IpProto::Tcp(tcp_packet) = ipv4_packet.proto { |
| 66 | + if tcp_packet.syn == 1 { |
| 67 | + nb_syn_packets += 1; |
| 68 | + if let Some(count) = |
| 69 | + map.get_mut(&IpAddr::V4(ipv4_packet.src_ip)) |
| 70 | + { |
| 71 | + *count += 1; |
| 72 | + } else { |
| 73 | + map.insert(IpAddr::V4(ipv4_packet.src_ip), 1); |
| 74 | + } |
| 75 | + } |
| 76 | + } |
| 77 | + } |
| 78 | + if let IpPacket::V6(ipv6_packet) = ip_packet { |
| 79 | + if let IpProto::Tcp(tcp_packet) = ipv6_packet.proto { |
| 80 | + if tcp_packet.syn == 1 { |
| 81 | + nb_syn_packets += 1; |
| 82 | + if let Some(count) = |
| 83 | + map.get_mut(&IpAddr::V6(ipv6_packet.src_ip)) |
| 84 | + { |
| 85 | + *count += 1; |
| 86 | + } else { |
| 87 | + map.insert(IpAddr::V6(ipv6_packet.src_ip), 1); |
| 88 | + } |
| 89 | + } |
| 90 | + } |
| 91 | + } |
| 92 | + } |
| 93 | + }); |
| 94 | + |
| 95 | + if (nb_syn_packets as f64 / WIN_SIZE as f64) > 0.45 { |
| 96 | + detected.store(true, std::sync::atomic::Ordering::Relaxed); |
| 97 | + } else { |
| 98 | + detected.store(false, std::sync::atomic::Ordering::Relaxed); |
| 99 | + } |
| 100 | + } |
| 101 | + }); |
| 102 | + |
| 103 | + Self { map, detected } |
| 104 | + } |
| 105 | + |
| 106 | + pub fn render(&self, frame: &mut Frame, block: Rect) { |
| 107 | + let mut ips: Vec<(IpAddr, usize)> = { |
| 108 | + let map = self.map.lock().unwrap(); |
| 109 | + map.clone().into_iter().collect() |
| 110 | + }; |
| 111 | + ips.sort_by(|a, b| b.1.cmp(&a.1)); |
| 112 | + |
| 113 | + ips.retain(|(_, count)| *count > 10_000); |
| 114 | + |
| 115 | + let top_3_ips = ips.into_iter().take(3); |
| 116 | + |
| 117 | + let widths = [Constraint::Min(30), Constraint::Min(20)]; |
| 118 | + |
| 119 | + let rows = top_3_ips.map(|(ip, count)| { |
| 120 | + Row::new(vec![ |
| 121 | + Line::from(ip.to_string()).centered().bold(), |
| 122 | + Line::from(count.to_string()).centered(), |
| 123 | + ]) |
| 124 | + }); |
| 125 | + let table = Table::new(rows, widths) |
| 126 | + .column_spacing(2) |
| 127 | + .flex(Flex::SpaceBetween) |
| 128 | + .header( |
| 129 | + Row::new(vec![ |
| 130 | + Line::from("IP Address").centered(), |
| 131 | + Line::from("Number of SYN packets").centered(), |
| 132 | + ]) |
| 133 | + .style(Style::new().bold()) |
| 134 | + .bottom_margin(1), |
| 135 | + ) |
| 136 | + .block( |
| 137 | + Block::new() |
| 138 | + .title(" SYN Flood Attack ") |
| 139 | + .borders(Borders::all()) |
| 140 | + .border_style(Style::new().yellow()) |
| 141 | + .title_alignment(Alignment::Center), |
| 142 | + ); |
| 143 | + |
| 144 | + frame.render_widget(table, block); |
| 145 | + } |
| 146 | +} |
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