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use std::collections::HashMap;
use std::fmt::{Display, Formatter};
use pcap::{Device, Capture, ConnectionStatus, Packet, PacketHeader};
use pktparse::{ethernet, ipv4, tcp, udp, icmp, arp};
use std::net::Ipv4Addr;
use std::string::ToString;
use pktparse::ip::IPProtocol;
use pktparse::ipv4::IPv4Header;
#[cfg(test)]
mod tests {
#[test]
fn it_works() {
let result = 2 + 2;
assert_eq!(result, 4);
}
}
#[derive(Eq, PartialEq, Hash, Debug)]
pub struct ConnInfo {
pub src: Ipv4Addr,
pub dst: Ipv4Addr,
pub src_port: u16,
pub dst_port: u16,
pub protocol: String,
pub app_descr: String,
}
impl ConnInfo {
pub fn new(src: Ipv4Addr, dst: Ipv4Addr, src_port: u16, dst_port: u16, protocol: String, app_descr: String) -> Self {
ConnInfo {
src,
dst,
src_port,
dst_port,
protocol,
app_descr,
}
}
}
impl Display for ConnInfo {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
write!(f, "({}|{}|{}|{}|{}|{})", self.src, self.dst, self.protocol, self.src_port, self.dst_port, self.app_descr)
}
}
pub struct ConnData {
pub ts_first: libc::timeval,
pub ts_last: libc::timeval,
pub total_bytes: usize,
}
impl ConnData {
pub fn new(ts_first: libc::timeval, ts_last: libc::timeval, total_bytes: usize) -> Self {
ConnData {
ts_first,
ts_last,
total_bytes,
}
}
}
impl Display for ConnData {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
write!(f, "(tot_bytes:{} ts_first:{}.{:06} ts_last:{}.{:06})", self.total_bytes, self.ts_first.tv_sec, self.ts_first.tv_usec, self.ts_last.tv_sec, self.ts_last.tv_usec)
}
}
pub trait ToStr {
fn tostring(&self) -> String;
}
impl ToStr for IPProtocol {
fn tostring(&self) -> String {
match self {
IPProtocol::ICMP => { "ICMP".to_string() }
IPProtocol::UDP => { "UDP".to_string() }
IPProtocol::TCP => { "TCP".to_string() }
_ => { "".to_string() }
}
}
}
pub fn list_all_devices() -> Vec<Device> {
let devices = Device::list().unwrap();
for d in &devices {
if d.flags.connection_status.eq(&ConnectionStatus::Connected) && d.addresses.len() > 1 {
println!("{:?}: {:?} - IP Net interface: {:?}", d.name, d.flags.connection_status, d.addresses[1].addr);
} else if d.flags.connection_status.eq(&ConnectionStatus::Connected) && d.addresses.len() < 2 {
continue; } else {
println!("{:?}: {:?}", d.name, d.flags.connection_status);
}
}
devices
}
pub fn print_hashmap(hm: &HashMap<ConnInfo, ConnData>) -> () {
let mut i = 1;
for (key, value) in hm {
println!("{}|{}:{}", i, key, value);
i += 1;
}
}
pub fn reporting(report: &mut HashMap<ConnInfo,ConnData>, datagram: IPv4Header, src: u16, dst: u16, packet_header: &PacketHeader, length: usize) -> () {
let ci = ConnInfo::new(datagram.source_addr, datagram.dest_addr, src, dst, datagram.protocol.tostring(), "".to_string());
let cd = ConnData::new(packet_header.ts, packet_header.ts, length + 38);
report.entry(ci)
.and_modify(|cd| {
cd.total_bytes += length + 38;
cd.ts_last = packet_header.ts
})
.or_insert(cd);
}
pub fn app_recognition_udp(src: u16, dst: u16) -> () {
if dst == 53 || src == 53 {
} else if dst == 161 || src == 161 {
}
}
pub fn app_recognition_tcp(src: u16, dst: u16) -> () {
if dst == 80 || src == 80 {
} else if dst == 443 || src == 443 {
} else if dst == 22 || src == 22 {
}
}
pub fn parsing(report: &mut HashMap<ConnInfo,ConnData>, packet: Packet) -> () {
if let Ok((payload_e, frame)) = ethernet::parse_ethernet_frame(packet.data) {
match frame.ethertype {
ethernet::EtherType::IPv4 => {
if let Ok((payload_i, datagram)) = ipv4::parse_ipv4_header(payload_e) {
match datagram.protocol {
IPProtocol::TCP => {
if let Ok((_payload_t, segment)) = tcp::parse_tcp_header(payload_i) {
reporting(report,datagram, segment.source_port, segment.dest_port, packet.header, payload_e.len());
app_recognition_tcp(segment.source_port, segment.dest_port);
} else {
println!("Error parsing TCP segment.");
}
}
IPProtocol::UDP => {
if let Ok((_payload_u, udp_datagram)) = udp::parse_udp_header(payload_i) {
reporting(report, datagram, udp_datagram.source_port, udp_datagram.dest_port, packet.header, payload_e.len());
app_recognition_udp(udp_datagram.source_port, udp_datagram.dest_port);
} else {
println!("Error parsing UDP datagram.");
}
}
IPProtocol::ICMP => { if let Ok((_payload, _packet)) = icmp::parse_icmp_header(payload_i) {
} else {
println!("Error parsing ICMP packet.");
}
}
_ => { println!("L4 protocol not supported") }
}
} else {
println!("Error parsing IP datagram.");
}
}
ethernet::EtherType::ARP => { if let Ok((_payload, _packet)) = arp::parse_arp_pkt(payload_e) {
print_hashmap(report);
} else {
println!("Error parsing ARP packet.");
}
}
_ => {
println!("L3 protocol not supported");
}
}
} else {
println!("Error parsing Ethernet frame.");
}
}
pub fn start_capture(interface_name: &str, bpf_program: &str) -> () {
let mut cap = Capture::from_device(interface_name).unwrap().promisc(true)
.open().unwrap();println!("Sniffing process in promiscuous mode is active on interface: {}", interface_name);
cap.filter(bpf_program, true).unwrap();
let mut report: HashMap<ConnInfo, ConnData> = HashMap::new();
while let Ok(packet) = cap.next_packet() { parsing(&mut report, packet);
}
print_hashmap(&report);
}