Creating a printer emulator to capture PDL/PCL data coming in on port 9100. Post: 302389077

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Special Forums IP Networking Creating a printer emulator to capture PDL/PCL data coming in on port 9100. Post 302389077 by transistor on Friday 22nd of January 2010 02:32:37 PM

01-22-2010

Registered User

Thanks, Corona.

I tried using Windump - a port of tcpdump - to see if I could catch anything. I set it to listen for incoming on port 9100 but couldn't see anything. (I could see traffic if I listened for other devices on the LAN.) This caused me to think that the stream might be interactive.

Any other ideas? I'll mess around with tcpdump/Windump between to laptops and see if I can understand how it's supposed to work.

---------- Post updated at 07:32 PM ---------- Previous update was at 06:49 PM ----------

Right. Two XP laptops.

Source: 192.168.3.3, with a generic/text printer driver pointing to 192.168.3.4, port 9100.
Dest: 192.168.3.4 (Hohner) running WinDump. WinDump listening to port 9100.

Here's what I got when I try to print "Hallo World!" from Notepad on source machine ...

Code:

E:\windump>windump -i 2 -A -f -q -t -X port 9100
windump: listening on \Device\NPF_{8071A9D5-8999-472A-85C5-B1E55ABFFC9E}
IP 192.168.3.3.1982 > HOHNER.9100: tcp 0
        0x0000:  4500 0030 6b7d 4000 8006 07f3 c0a8 0303  E..0k}@.........
        0x0010:  c0a8 0304 07be 238c 7ebb 2438 0000 0000  ......#.~.$8....
        0x0020:  7002 ffff 2dee 0000 0204 0550 0101 0402  p...-......P....
IP 192.168.3.3.1983 > HOHNER.9100: tcp 0
        0x0000:  4500 0030 6b83 4000 8006 07ed c0a8 0303  E..0k.@.........
        0x0010:  c0a8 0304 07bf 238c 3334 eff4 0000 0000  ......#.34......
        0x0020:  7002 ffff adb7 0000 0204 0550 0101 0402  p..........P....

It keeps repeating this and the print queue on source machine never clears. It looks like the source is expecting a response from dest.

Any ideas how to spoof a response from the "printer"?
Am I mad?

Last edited by transistor; 01-22-2010 at 03:46 PM.. Reason: Improved clarity - I hope!

transistor

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LEARN ABOUT SUSE

dvihp

DVIHP(1)                                                      General Commands Manual                                                     DVIHP(1)

NAME

       dvihp - convert a TeX DVI file to Hewlett-Packard PCL

SYNOPSIS

       dvihp [options] dvifile[.dvi]

DESCRIPTION

       dvihp translates the given dvifile to Hewlett-Packard PCL using dvicopy(1) then $DVILJ (dvilj4 by default).

       In the absence of other options, pipe the PCL to $SPOOL (lpr by default).

OPTIONS

       Options are recognized from dvips where possible:

       -A     print odd pages

       -B     print even pages

       -d n   set debug bits to n (see documentation)

       -D n   set resolution to n

       -f     run as filter

       -l n   don't print pages after n

       -m     manual feed

       -n n   print n pages

       -O a,b set/change paper offset to a,b mm.

       -o s   output to s instead of spooling

       -p n   don't print pages before n.

       -Ps    pass directly to lpr.

       -v     verbose operation.

       -x n   set magnification to n.

       --help write usage summary.

       Other options are passed to the dvilj program.

BUGS

       Email bug reports to tex-k@tug.org.

SEE ALSO

       dvicopy(1), dvilj4(1).

                                                                 December 24, 2009                                                        DVIHP(1)

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