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Forum Discussion

Matthew_Gamble_'s avatar
Matthew_Gamble_
Icon for Nimbostratus rankNimbostratus
Mar 12, 2009

TFTP Server?

Is it possible to write a simple TFTP server as an iRule to return static content? I see some examples for load balancing TFTP requests, but not for actually acting as a TFTP server. I have a very s...
application delivery
dev
devops
iRules
JRahm's avatar
JRahm
Icon for Admin rankAdmin
Mar 12, 2009
I don't think the protocol handling would be that difficult, the problem is how to handle serving up the file, that command is disabled in iRules. Here's a start, maybe someone else has some ideas? 

 
 when CLIENT_ACCEPTED { 
 log local0. "Client connected from [IP::client_addr]" 
 binary scan [UDP::payload] xc opcode 
 log local0. "Opcode is $opcode" 
 if { $opcode == 1 } { 
 binary scan [UDP::payload] xxa* string 
 log local0. "String is $string" 
 set stringlist [split $string \000] 
 set file [lindex $stringlist 0] 
 set mode [lindex $stringlist 1] 
 log local0. "File is $file, Mode is $mode" 
 if { $mode != "octet" && $mode != "netascii" } { 
 reject 
 } else { 
 log local0. "Send the file!" 
 write goes here 
 } 
 } else { reject } 
 }