46 lines
1.1 KiB
Fennel
46 lines
1.1 KiB
Fennel
(local tftp (require :tftp))
|
|
(local { : realpath} (require :posix.stdlib))
|
|
(local { : view } (require :fennel))
|
|
|
|
(local options
|
|
(match arg
|
|
["-a" ip-address dir]
|
|
{ :allow ip-address :base-directory (realpath dir)}
|
|
|
|
[dir]
|
|
{ :allow nil :base-directory (realpath dir)}
|
|
|
|
[]
|
|
(error "missing command line parameters")
|
|
))
|
|
|
|
(print (.. "TFTP serving from " options.base-directory))
|
|
|
|
(fn merge-pathname [directory filename]
|
|
(if (directory:match "/$")
|
|
(.. directory filename)
|
|
(.. directory "/" filename)))
|
|
|
|
(->
|
|
(tftp:listen
|
|
(fn [file host port]
|
|
(if (or (not options.allow) (= host options.allow))
|
|
(let [pathname (merge-pathname options.base-directory file)
|
|
f (io.open pathname "rb")
|
|
size (f:seek "end")]
|
|
(f:seek "set" 0)
|
|
(var eof? false)
|
|
(values
|
|
(fn handler [reqlen]
|
|
(let [bytes (f:read reqlen)]
|
|
(if bytes
|
|
(values true bytes)
|
|
(values false nil))))
|
|
size))
|
|
(error "host not allowed")))
|
|
nil
|
|
["*"]
|
|
69)
|
|
|
|
(os.exit))
|