fix buffering problem by introduce tokio
This commit is contained in:
438
Cargo.lock
generated
438
Cargo.lock
generated
@ -2,6 +2,21 @@
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dependencies = [
|
||||
"cfg-if",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tokio"
|
||||
version = "1.45.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "75ef51a33ef1da925cea3e4eb122833cb377c61439ca401b770f54902b806779"
|
||||
dependencies = [
|
||||
"backtrace",
|
||||
"bytes",
|
||||
"libc",
|
||||
"mio",
|
||||
"parking_lot",
|
||||
"pin-project-lite",
|
||||
"signal-hook-registry",
|
||||
"socket2",
|
||||
"tokio-macros",
|
||||
"windows-sys 0.52.0",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tokio-macros"
|
||||
version = "2.5.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "6e06d43f1345a3bcd39f6a56dbb7dcab2ba47e68e8ac134855e7e2bdbaf8cab8"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tracing"
|
||||
version = "0.1.41"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "784e0ac535deb450455cbfa28a6f0df145ea1bb7ae51b821cf5e7927fdcfbdd0"
|
||||
dependencies = [
|
||||
"pin-project-lite",
|
||||
"tracing-attributes",
|
||||
"tracing-core",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tracing-attributes"
|
||||
version = "0.1.30"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "81383ab64e72a7a8b8e13130c49e3dab29def6d0c7d76a03087b3cf71c5c6903"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tracing-core"
|
||||
version = "0.1.34"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "b9d12581f227e93f094d3af2ae690a574abb8a2b9b7a96e7cfe9647b2b617678"
|
||||
dependencies = [
|
||||
"once_cell",
|
||||
"valuable",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tracing-log"
|
||||
version = "0.2.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ee855f1f400bd0e5c02d150ae5de3840039a3f54b025156404e34c23c03f47c3"
|
||||
dependencies = [
|
||||
"log",
|
||||
"once_cell",
|
||||
"tracing-core",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tracing-subscriber"
|
||||
version = "0.3.19"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "e8189decb5ac0fa7bc8b96b7cb9b2701d60d48805aca84a238004d665fcc4008"
|
||||
dependencies = [
|
||||
"matchers",
|
||||
"nu-ansi-term",
|
||||
"once_cell",
|
||||
"regex",
|
||||
"sharded-slab",
|
||||
"smallvec",
|
||||
"thread_local",
|
||||
"tracing",
|
||||
"tracing-core",
|
||||
"tracing-log",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "unicode-ident"
|
||||
version = "1.0.18"
|
||||
@ -304,6 +563,49 @@ version = "0.2.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
|
||||
|
||||
[[package]]
|
||||
name = "valuable"
|
||||
version = "0.1.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ba73ea9cf16a25df0c8caa16c51acb937d5712a8429db78a3ee29d5dcacd3a65"
|
||||
|
||||
[[package]]
|
||||
name = "wasi"
|
||||
version = "0.11.1+wasi-snapshot-preview1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
|
||||
|
||||
[[package]]
|
||||
name = "winapi"
|
||||
version = "0.3.9"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
|
||||
dependencies = [
|
||||
"winapi-i686-pc-windows-gnu",
|
||||
"winapi-x86_64-pc-windows-gnu",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "winapi-i686-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
||||
|
||||
[[package]]
|
||||
name = "winapi-x86_64-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||
|
||||
[[package]]
|
||||
name = "windows-sys"
|
||||
version = "0.52.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
|
||||
dependencies = [
|
||||
"windows-targets",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows-sys"
|
||||
version = "0.59.0"
|
||||
|
||||
@ -7,5 +7,6 @@ edition = "2021"
|
||||
|
||||
[dependencies]
|
||||
clap = { version = "4.5.4", features = ["derive", "env"] }
|
||||
env_logger = "0.11.8"
|
||||
log = "0.4.27"
|
||||
tokio = { version = "1.0", features = ["full"] }
|
||||
tracing = "0.1.41"
|
||||
tracing-subscriber = { version = "0.3.19", features = ["env-filter"] }
|
||||
|
||||
92
src/main.rs
92
src/main.rs
@ -1,9 +1,32 @@
|
||||
use clap::Parser;
|
||||
use std::io;
|
||||
use std::net::{TcpStream, ToSocketAddrs, UdpSocket};
|
||||
use std::str::FromStr;
|
||||
use std::thread;
|
||||
use std::time::Duration;
|
||||
use tokio::io::{AsyncReadExt, AsyncWriteExt};
|
||||
use tokio::net::{TcpStream, UdpSocket};
|
||||
|
||||
// Custom copy function that flushes after each write to avoid buffering
|
||||
async fn copy_with_flush<R, W>(reader: &mut R, writer: &mut W) -> tokio::io::Result<u64>
|
||||
where
|
||||
R: AsyncReadExt + Unpin,
|
||||
W: AsyncWriteExt + Unpin,
|
||||
{
|
||||
let mut buf = [0u8; 1024]; // Use a small buffer for low latency
|
||||
let mut total_copied = 0u64;
|
||||
|
||||
loop {
|
||||
match reader.read(&mut buf).await {
|
||||
Ok(0) => break, // EOF
|
||||
Ok(n) => {
|
||||
writer.write_all(&buf[..n]).await?;
|
||||
writer.flush().await?; // Flush immediately to avoid buffering
|
||||
total_copied += n as u64;
|
||||
}
|
||||
Err(e) => return Err(e),
|
||||
}
|
||||
}
|
||||
|
||||
Ok(total_copied)
|
||||
}
|
||||
|
||||
#[derive(Debug, Clone)]
|
||||
enum Protocol {
|
||||
@ -51,11 +74,11 @@ struct Cli {
|
||||
knock: Vec<KnockTarget>,
|
||||
}
|
||||
|
||||
fn main() -> Result<(), Box<dyn std::error::Error>> {
|
||||
#[tokio::main]
|
||||
async fn main() -> Result<(), Box<dyn std::error::Error>> {
|
||||
let cli = Cli::parse();
|
||||
|
||||
env_logger::builder().target(env_logger::Target::Stderr).init();
|
||||
|
||||
tracing_subscriber::fmt().with_writer(std::io::stderr).init();
|
||||
|
||||
let (target_host, _target_port) = {
|
||||
let parts: Vec<&str> = cli.target_address.split(':').collect();
|
||||
@ -65,50 +88,55 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
|
||||
(parts[0], parts[1].parse::<u16>()?)
|
||||
};
|
||||
|
||||
log::info!("Starting port knocking sequence...");
|
||||
tracing::info!("Starting port knocking sequence...");
|
||||
|
||||
for knock_target in &cli.knock {
|
||||
let addr = format!("{}:{}", target_host, knock_target.port)
|
||||
.to_socket_addrs()?
|
||||
.next()
|
||||
.ok_or("Could not resolve host")?;
|
||||
let addr = format!("{}:{}", target_host, knock_target.port);
|
||||
|
||||
match knock_target.protocol {
|
||||
Protocol::Tcp => {
|
||||
log::debug!("Knocking on TCP port {}", knock_target.port);
|
||||
let timeout = Duration::from_secs(1);
|
||||
if TcpStream::connect_timeout(&addr, timeout).is_err() {
|
||||
tracing::debug!("Knocking on TCP port {}", knock_target.port);
|
||||
// Use tokio's timeout for TCP knocking
|
||||
let connect_future = TcpStream::connect(&addr);
|
||||
if tokio::time::timeout(Duration::from_secs(1), connect_future).await.is_err() {
|
||||
// We expect errors here, like connection refused or timeout.
|
||||
// The goal is just to hit the port.
|
||||
}
|
||||
}
|
||||
Protocol::Udp => {
|
||||
log::debug!("Knocking on UDP port {}", knock_target.port);
|
||||
let socket = UdpSocket::bind("0.0.0.0:0")?;
|
||||
socket.send_to(&[], addr)?;
|
||||
tracing::debug!("Knocking on UDP port {}", knock_target.port);
|
||||
let socket = UdpSocket::bind("0.0.0.0:0").await?;
|
||||
socket.send_to(&[], &addr).await?;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
log::debug!("Knocking sequence finished. Connecting to {}...", cli.target_address);
|
||||
tracing::debug!("Knocking sequence finished. Connecting to {}...", cli.target_address);
|
||||
|
||||
let mut stream = TcpStream::connect(&cli.target_address)?;
|
||||
let mut stream_clone = stream.try_clone()?;
|
||||
let stream = TcpStream::connect(&cli.target_address).await?;
|
||||
|
||||
log::info!("Connection established. Proxying data...");
|
||||
tracing::info!("Connection established. Proxying data...");
|
||||
|
||||
let stdin_thread = thread::spawn(move || {
|
||||
let mut stdin = io::stdin();
|
||||
io::copy(&mut stdin, &mut stream_clone).ok();
|
||||
});
|
||||
// Split the stream for bidirectional communication
|
||||
let (mut stream_read, mut stream_write) = stream.into_split();
|
||||
|
||||
// Create stdin and stdout handles
|
||||
let mut stdin = tokio::io::stdin();
|
||||
let mut stdout = tokio::io::stdout();
|
||||
|
||||
let stdout_thread = thread::spawn(move || {
|
||||
let mut stdout = io::stdout();
|
||||
io::copy(&mut stream, &mut stdout).ok();
|
||||
});
|
||||
|
||||
stdin_thread.join().unwrap();
|
||||
stdout_thread.join().unwrap();
|
||||
// Use tokio::select! to handle bidirectional data transfer
|
||||
tokio::select! {
|
||||
result = copy_with_flush(&mut stdin, &mut stream_write) => {
|
||||
if let Err(e) = result {
|
||||
tracing::error!("Error copying from stdin to stream: {}", e);
|
||||
}
|
||||
}
|
||||
result = copy_with_flush(&mut stream_read, &mut stdout) => {
|
||||
if let Err(e) = result {
|
||||
tracing::error!("Error copying from stream to stdout: {}", e);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user