[cups] LPD printer drops LPD chatting

[Helge Blischke]

> Am 22.11.2017 um 20:08 schrieb Matthias Apitz <guru at unixarea.de>:
> 
> 
> Hello,
> 
> I have a network printer which accepts jobs via LPD but drops the
> chatting during the initial commands:
> 
> ...
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Wrote 1338 bytes of print data...
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Read 55 bytes of print data...
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Wrote 55 bytes of print data...
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] STATE: +connecting-to-device
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Looking up "10.185.201.101"...
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Connecting to 10.185.201.101:515 for printer 
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Mit Drucker verbinden …
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] STATE: -connecting-to-device
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Mit Drucker verbunden …
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Connected to 10.185.201.101:515 (IPv4) (local port 1022)...
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] lpd_command 02 
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Sending command string (2 bytes)...
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Reading command status...
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] lpd_command returning 0
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Control file is:
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Hsunny1.local
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Psisis
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Jlp_3_3665_58
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] ldfA456sunny1.local
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] UdfA456sunny1.local
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Nlp_3_3665_58
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] lpd_command 02 89 cfA456sunny1.local
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Sending command string (23 bytes)...
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Reading command status...
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] lpd_command returning 0
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Steuerungsdatei senden (89 Byte)
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Steuerungsdatei erfolgreich übertragen
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] lpd_command 03 394609 dfA456sunny1.local
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Sending command string (27 bytes)...
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Reading command status...
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Set job-printer-state-message to "Entfernter Host hat nicht mit dem Befehlstatusbyte geantwortet nach 300 Sekunden!", current level=WARN
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] lpd_command returning 4
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] Backend returned status 1 (failed)
> D [06/Nov/2017:13:04:07 +0100] [Job 191239] End of messages
> 
> What could be the reason for not answering the control commands? Sorry
> for the German messages, but I think it's clear what they mean.
> 
> Btw: Why the backend lpd is using a local port below 1024?
> 
> Thanks
> 
> 	matthias
> -- 

Try to append a 0x00 byte to the data file and see if it prints then. There are legacy printers that require this (using the PLP (public line printer) protocol.

Helge