RusTFTP

A client and server implementation of the Trivial File Transfer Protocol,
written in Rust.


Currently supported:
- RFC 1350 (TFTP revision 2)
- RFC 2347 (Option Extension)
- RFC 2348 (Blocksize Option)
- RFC 2349 (Timeout Interval and Transfer Size Options)

Non-standard options:
- blksize2: block size as a power of 2
- utimeout: timeout in microseconds


Use cargo to build the binaries (output dir is target/release/):
 $ cargo build --release


Client:

 $ ./rtftpc --help
 RusTFTP
 
 ./rtftpc [options] <remote>[:port]
 
 Options:
     -h, --help          display usage information
     -g, --get FILE      download file from remote server
     -p, --put FILE      upload file to remote server
     -b, --blksize SIZE  negotiate a different block size (default: 1428)
     -n, --netascii      use netascii mode (instead of octet)


Server:

 $ ./rtftpd --help
 RusTFTP
 
 ./rtftpd [options] [directory]
 
 Options:
     -h, --help          display usage information
     -p, --port PORT     port to listen on (default: 69)
     -u, --uid UID       user id to run as (default: 65534)
     -g, --gid GID       group id to run as (default: 65534)
     -r, --read-only     allow only reading/downloading of files (RRQ)
     -w, --write-only    allow only writing/uploading of files (WRQ)
     -t, --threads N     number of worker threads (default: 2)


Notes:

 As the block number is two bytes long, the number of blocks is limited
 to 65535 (with the first block starting at 1).
 To support the transfer of files larger than 65535 blocks, it will wrap around
 after reaching the maximum and start at 0 again, which is not defined in the
 standard.


License:

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.