I have a printer that's being strange. Since the printer itself runs
ipp, I'm trying to send it jobs directly with
lp/lpstat/loptions/cancel &c, without talking to cupsd.
I get some responses, but nothing very helpful. Are the cups client
utilities supposed to be able to talk generic IPP, or do they assume
the far end is cups?
Since IPP is based on HTTP, I also tried just using netcat, but
RFC2910 ยง13.1 seems to be sying that it has a bunch of byte-encoded
stuff, rather than just VERB LOCATION PROTO/VERSION.
Google and IRC haven't helped, so my next step I guess is to actually
read the RFCs instead of just skimming them.
$ ssh root@printserver grep DeviceURI /etc/cups/printers.conf
DeviceURI ipp://mfd
[....]
$ ping -c1 mfd
PING mfd.cyber.com.au (203.7.155.91) 56(84) bytes of data.
64 bytes from MFD.cyber.com.au (203.7.155.91): icmp_seq=1 ttl=254
time=0.723 ms
--- mfd.cyber.com.au ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.723/0.723/0.723/0.000 ms
This saves adding -h every time. Also I found that lpstat -t -h foo
will STILL talk to the default printserver (not foo) for some of its
queries -- WTF?
$ cat ~/.cups/client.conf
ServerName mfd
$ lpstat -t
scheduler is running
no system default destination
lpstat: server-error-operation-not-supported
lpstat: server-error-operation-not-supported
lpstat: server-error-operation-not-supported
lpstat: server-error-operation-not-supported
$ date | lp -d canthappen
request id is canthappen-498 (0 file(s))
$ date | lp -d foo
request id is foo-500 (0 file(s))
$ date | lp -d ''
request id is -502 (0 file(s))
...printer still hasn't printed anything.
$ lpstat -t
scheduler is running
no system default destination
lpstat: server-error-operation-not-supported
lpstat: server-error-operation-not-supported
lpstat: server-error-operation-not-supported
lpstat: server-error-operation-not-supported
MFD speaks PS (I think), so try that as well as text/plain.
Doesn't help.
$ date | a2ps -o- | lp -d '' # the mfd speaks PS (I think), so try that.
[stdin (plain): 1 page on 1 sheet]
[Total: 1 page on 1 sheet] sent to the standard output
request id is -504 (0 file(s))
$ nc mfd ipp
GET /
HTTP/1.1 400 Bad Request
Server: gSOAP/2.7
Content-Length: 0
Connection: close
$ nc mfd ipp
Print-Job 1 IPP/1.1
HTTP/1.1 400 Bad Request
Server: gSOAP/2.7
Content-Length: 0
Connection: close
$
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