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KenG's avatar
KenG
Icon for Nimbostratus rankNimbostratus
May 19, 2017

Inject commands on an FTP connection

Does anyone know if it is possible to inject a command into an FTP conversation?

 

I've trying to work around a bug in the application that is incorrectly asking for a transfer in ascii mode and prior to any GET I'd like to inject a BIN command. It looks like the server defaults to ASCII so I can't just remove the ASCII command from the stream so the [TCP::Payload] replacement thing doesn't seem appropriate.

 

Anyone got any bright ideas?

 

application delivery
iRules

2 Replies

  • Anesh's avatar
    Anesh
    Icon for Cirrostratus rankCirrostratus
    May 19, 2017

    try the below

    when SERVER_CONNECTED {
TCP::collect
}
when SERVER_DATA {
if {[TCP::payload] contains "string after which you want to inject BIN" }
TCP::respond "BIN"
TCP::payload replace 0 [TCP::payload length] ""
TCP::release

}