📄 README.md

TFTP packet parser in Rust

This is a simple library that parses tftp byte packets. See the docs for more information.

The tftp packet

WRQ/RRQ

Opcode	Filename	0	Mode	0
2 bytes	string	1 byte	string	1 byte
`01` or `02` as `u16`	`"file"` as `[u8]`	`0` as `u8`	`"octet"` as `[u8]`	`0` as `u8`

DATA

Opcode	Block #	Data
2 bytes	2 bytes	0 - 512 bytes
`03` as `u16`	1 - x as `u16`	Data Chunk as `[u8]`

Block #: Increments with each block sent
Data: Transmission terminates automatically if Packet length < 512

ACK

Opcode	Block #
2 bytes	2 bytes
`04` as `u16`	1 - x as `u16`

ERROR

Opcode	Error Code	Error Message	0
2 bytes	2 bytes	string	1 byte
`05` as `u16`	`x` as `u16`	`"msg"` as `[u8]`	`0`as `u8`

Protocol

WRQ

sequenceDiagram
    participant Client
    participant Server

    Client->>Server: WRQ, TID=69

    Note right of Server: Block #35;: 0
    Server->>Client: ACK, TID=xyz

    loop TID=xyz
        Client-->>Server: DATA
        Server-->>Client: ACK
    end