Struct ReusablePacketWriter

pub struct ReusablePacketWriter { /* private fields */ }

Wrapper around Vec<u8> that is pre-allocates memory for writing packet bytes

Implementations

impl ReusablePacketWriter

pub fn new() -> Self

Creates wrapper around Vec<u8> with pre-allocated u16::MAX (max possible MTU size)

Examples found in repository

examples/udp_packet.rs (line 12)

fn main() -> ip_spoofing::Result<()> {
    //wrapper around raw sockets, requires root privileges
    let socket = RawSocket::new()?;

    //wrapper for writing packets in pre-allocated memory
    let mut writer = ReusablePacketWriter::new();

    //sends fake UDP packet
    socket.send_fake_udp_packet(
        &mut writer,
        [8, 8, 8, 8],   //source IPv4 address
        1234,           //source port
        [127, 0, 0, 1], //destination IPv4 address
        5678,           //destination port
        b"hey",         //data
        64,             //TTL on most Linux machines is 64
    )?;

    Ok(())
}

examples/udp_flood.rs (line 12)

fn main() -> ip_spoofing::Result<()> {
    //wrapper around raw sockets, requires root privileges
    let socket = RawSocket::new()?;

    //wrapper for writing packets in pre-allocated memory
    let mut writer = ReusablePacketWriter::new();
    //thread-local pseudorandom number generator
    let mut rng = thread_rng();

    //endless spam with a randomly generated UDP packet
    loop {
        let ret = socket.send_fake_udp_packet(
            &mut writer,
            rng.gen(),      //random source IPv4 address
            rng.gen(),      //random source port
            [127, 0, 0, 1], //destination IPv4 address
            5678,           //destination port
            b"hey",         //data
            64,             //TTL on most Linux machines is 64
        );

        if let Err(err) = ret {
            println!("{err:?}");
        }
    }
}

pub fn as_slice(&self) -> &[u8]

Takes slice of memory from this wrapper

pub fn build_ipv4_header( time_to_live: u8, protocol: IpNumber, source: [u8; 4], destination: [u8; 4], ) -> IpHeaders

Builds IPv4 header with randomized identification field

pub fn write_udp_packet( &mut self, source: [u8; 4], source_port: u16, destination: [u8; 4], destination_port: u16, payload: &[u8], time_to_live: u8, ) -> Result<()>

Writes UDP packet into buffer with given parameters

pub fn write_tcp_syn_packet( &mut self, source: [u8; 4], source_port: u16, destination: [u8; 4], destination_port: u16, payload: &[u8], time_to_live: u8, sequence_number: u32, window_size: u16, ) -> Result<()>

Writes TCP-SYN packet into buffer with given parameters

Trait Implementations

impl Debug for ReusablePacketWriter

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.