In-memory TFTP Server

This is a simple in-memory TFTP server, implemented in Go. It is RFC1350-compliant, but doesn't implement the additions in later RFCs. In particular, options are not recognized.

Usage

Build and run

The project has no external dependencies. Standard libraries and provided wire package (curtesy of igneous.io) are used.

$ go build
$ ./go-tftp

Additional notes

• The in-memory store has no limitation on size, mind memory usage when testing and using to prevent OOM.
• Only binary mode is supported.
• Note, unit tests are missing, pending another evening of fun.
• The general purpose logger outputs to STDOUT, suitable to be packaged as a container.
• There is another logger, a registry of all RRQs and WRQs written to a file.

      -Max-timeout int
            TFTP max timeout (default 25)
      -Rexmt-interval int
            TFTP Retransmit interval (default 5)
      -host string
            TFTP interface address (default "127.0.0.1:6969")
      -registryFile string
            TFTP WRQ/RRQ registry. (default "tftpRegistry.log")

Testing

• Any tftp client can be used for testing. make sure to use binary mode.
• Use -race if using go run e.g. go run -race *.go.

Example bash function to send a file:

function tftp_send() {
  tftp $HOST $PORT << TFTP
  verb
  trace
  binary
  put $FILE
TFTP
}

Fetch a file:

function tftp_get() {
  tftp $HOST $PORT << TFTP
  verb
  trace
  binary
  get $FILE back-$FILE
TFTP
}

Coming soon

• Unit tests.
• CI/CD, to validate tests, and package.
• Awesome GitHub badges :)
• Refactoring.

Feel free to reach out with comments etc.