yta_tftp - A Python3 TFTP Server

This is a POC solution from my exploring struct.un/pack and sockets. I've tried to keep it simple, and everything is reasonably documented.

• Is a Package you can import and run (See main.py for an example)
• Only uses native python packages (Doesn't use Scapy)
• Serves files from the working directory only
• Is threaded using ephemeral source ports for reply sockets (Can handle loads of transfers at once)
• Has been tested for multiple concurrent transfers exceeding 1GB in size

Gotchas

• Only supports RRQ (Read Requests) from calling clients
• If the expected file to serve is missing, it will break Fixed
• Do not use this to host anything serious - you do so at your own risk

Example 1

Download of a text file.

Client

yta@box $ tftp
tftp> get 127.0.0.1:file.txt
Received 2809 bytes in 0.0 seconds
tftp>

Server

Received OpCode: RRQ
Serve 127.0.0.1:55176:file.txt -> 49152
Done! 127.0.0.1:55176:file.txt -> 49152

Example 2

Download of a large video file, with concurrent requests for other files.

Client 1

tftp> get 127.0.0.1:mac.mp4
Received 1173828708 bytes in 112.2 seconds

Client 2

tftp> get 127.0.0.1:tongue.webm
Received 1531958 bytes in 0.2 seconds
tftp> get 127.0.0.1:file.txt
Received 2809 bytes in 0.0 seconds

Server

Received OpCode: RRQ
Serve 127.0.0.1:65059:mac.mp4 -> 49154
   Tx mac.mp4 32.0mb	-> 49154
   Tx mac.mp4 64.0mb	-> 49154
   Tx mac.mp4 96.0mb	-> 49154
   Tx mac.mp4 128.0mb	-> 49154
   Tx mac.mp4 160.0mb	-> 49154
   Tx mac.mp4 192.0mb	-> 49154
Received OpCode: RRQ
Serve 127.0.0.1:58964:tongue.webm -> 49155
Done! 127.0.0.1:58964:tongue.webm -> 49155
   Tx mac.mp4 224.0mb	-> 49154
   Tx mac.mp4 256.0mb	-> 49154
   Tx mac.mp4 288.0mb	-> 49154
   Tx mac.mp4 320.0mb	-> 49154
Received OpCode: RRQ
Serve 127.0.0.1:58966:file.txt -> 49156
Done! 127.0.0.1:58966:file.txt -> 49156
   Tx mac.mp4 352.0mb	-> 49154
   Tx mac.mp4 384.0mb	-> 49154
   Tx mac.mp4 416.0mb	-> 49154
   Tx mac.mp4 448.0mb	-> 49154
   Tx mac.mp4 480.0mb	-> 49154
   Tx mac.mp4 512.0mb	-> 49154
   Tx mac.mp4 544.0mb	-> 49154
   Tx mac.mp4 576.0mb	-> 49154
   Tx mac.mp4 608.0mb	-> 49154
   Tx mac.mp4 640.0mb	-> 49154
   Tx mac.mp4 672.0mb	-> 49154
   Tx mac.mp4 704.0mb	-> 49154
   Tx mac.mp4 736.0mb	-> 49154
   Tx mac.mp4 768.0mb	-> 49154
   Tx mac.mp4 800.0mb	-> 49154
   Tx mac.mp4 832.0mb	-> 49154
   Tx mac.mp4 864.0mb	-> 49154
   Tx mac.mp4 896.0mb	-> 49154
   Tx mac.mp4 928.0mb	-> 49154
   Tx mac.mp4 960.0mb	-> 49154
   Tx mac.mp4 992.0mb	-> 49154
   Tx mac.mp4 1024.0mb	-> 49154
   Tx mac.mp4 1056.0mb	-> 49154
   Tx mac.mp4 1088.0mb	-> 49154
Done! 127.0.0.1:65059:mac.mp4 -> 49154