async-tftp

Executor agnostic async TFTP implementation, written with smol building blocks. Currently it implements only server side.

The following RFCs are implemented:

• RFC 1350 - The TFTP Protocol (Revision 2).
• RFC 2347 - TFTP Option Extension.
• RFC 2348 - TFTP Blocksize Option.
• RFC 2349 - TFTP Timeout Interval and Transfer Size Options.
• RFC 7440 - TFTP Windowsize Option.

Features:

• Async implementation.
• Works with any runtime/executor.
• Serve read (RRQ) and write (WRQ) requests.
• Unlimited transfer file size (block number roll-over).
• You can set non-standard reply timeout. This is useful for faster file transfer in unstable environments.
• You can set block size limit. This is useful if you are accessing client through a VPN.
• You can implement your own Handler for more advance cases than just serving a directory. Check tftpd-targz.rs for an example.

Example

use async_tftp::server::TftpServerBuilder;
use async_tftp::Result;

#[tokio::main] // or any other runtime/executor
async fn main() -> Result<()> {
    let tftpd = TftpServerBuilder::with_dir_ro(".")?.build().await?;
    tftpd.serve().await?;
    Ok(())
}

Add in Cargo.toml:

[dependencies]
async-tftp = "0.3"
# or any other runtime/executor
tokio = { version = "1", features = ["rt-multi-thread", "macros"] }

Running examples with cargo

There are some examples included with this crate. You can run them from a source checkout with cargo:

$ cargo run --example tftpd-dir
TFTP directory: ...
Listening on: 0.0.0.0:6969
^C

$ cargo run --example tftpd-targz <archive-path>
Listening on: 0.0.0.0:6969
^C

License

MIT