Go tftp server and client

Tftp server and client that implement:

• RFC 1350 - The TFTP Protocol (Revision 2)

Client Usage

$ go run cmd/client/main.go
tftp> help
Commands:
        connect <host> <port>
        get <file>
        put <file>
        timeout <integer>
        trace
        quit

Config

Name	Use-Case	Default value
TFTP_PORT	Tftp server port	69
TFTP_LOG_LEVEL	Log level	debug
TFTP_READ_TIMEOUT	Timeout while reading tftp request in seconds	5
TFTP_WRITE_TIMEOUT	Timeout while writing tftp request in seconds	5
TFTP_NUM_TRIES	Number of times that a read/write request should be executed if one of them fails	5
TFTP_BASE_DIR	Tftp folder, where file can be stored and pulled from	~./tftp
TFTP_TRACE	Log each sent/received udp packet	false

Example get request

tftp> get <file>
received block#=1, received #bytes=512
received block#=2, received #bytes=512
received block#=3, received #bytes=512
received block#=4, received #bytes=512
received block#=5, received #bytes=512
....
received block#=33, received #bytes=512
received block#=34, received #bytes=512
received block#=35, received #bytes=512
received block#=36, received #bytes=289
received 36 blocks, received 18209 bytes
tftp>

Server usage

$ go run cmd/server/main.go
2024-03-01T19:36:40.815+0100    INFO    server/main.go:32       listening on port 69

Example logs when tftp server is serving a file

sent block#=1, sent #bytes=512
sent block#=2, sent #bytes=512
sent block#=3, sent #bytes=512
sent block#=4, sent #bytes=512
sent block#=5, sent #bytes=512
...
sent block#=33, sent #bytes=512
sent block#=34, sent #bytes=512
sent block#=35, sent #bytes=512
sent block#=36, sent #bytes=289
sent 36 blocks, sent 18209 bytes