Module tftp 

TFTP (Trivial File Transfer Protocol) layer implementation.

Implements RFC 1350 TFTP packet parsing as a zero-copy view into a packet buffer.

TFTP operates over UDP port 69 and defines 5 packet types:

Packet Types

Opcode	Abbreviation	Packet Type
1	RRQ	Read Request
2	WRQ	Write Request
3	DATA	Data
4	ACK	Acknowledgment
5	ERROR	Error

Packet Formats

RRQ / WRQ:

2 bytes   string   1 byte   string   1 byte
+---------+--------+--------+--------+--------+
| Opcode  |Filename|   0    |  Mode  |   0    |
+---------+--------+--------+--------+--------+

DATA:

2 bytes   2 bytes   n bytes
+---------+---------+--------+
| Opcode  |  Block# |  Data  |
+---------+---------+--------+

ACK:

2 bytes   2 bytes
+---------+---------+
| Opcode  |  Block# |
+---------+---------+

ERROR:

2 bytes   2 bytes   string   1 byte
+---------+---------+--------+--------+
| Opcode  | ErrorCode| ErrMsg |   0    |
+---------+---------+--------+--------+

Re-exports

pub use builder::TftpBuilder;

Modules

builder

TFTP packet builder.

Structs

TftpLayer

A zero-copy view into a TFTP layer within a packet buffer.

Constants

ERR_ACCESS_VIOLATION

ERR_DISK_FULL

ERR_FILE_EXISTS

ERR_FILE_NOT_FOUND

ERR_ILLEGAL_OPERATION

ERR_NO_SUCH_USER

ERR_UNDEFINED

ERR_UNKNOWN_TID

OPCODE_ACK

OPCODE_DATA

OPCODE_ERROR

OPCODE_RRQ

OPCODE_WRQ

TFTP_DEFAULT_BLOCK_SIZE

Default TFTP data block size (bytes).

TFTP_MIN_HEADER_LEN

Minimum TFTP header: opcode (2 bytes).

TFTP_PORT

TFTP server UDP port.

Statics

TFTP_FIELD_NAMES

Field names for Python/generic access.

Functions

error_code_description

Returns a human-readable description for a TFTP error code.

is_tftp_payload

Returns true if buf looks like a TFTP payload.

opcode_name

Returns a human-readable name for a TFTP opcode.

tftp_show_fields

Display fields for TftpLayer in show() output.