[cups] Windows10 LPD services does not accept LPD jobs

[Matthias Apitz]

Hello,

I've a Windows 10 PC with a configured printer share. It denies
accepting print jobs which CUPS is sending via LPD. Here are the details
of the LPD exchange:


12:39:38.962701 IP 172.16.224.68.60758 > 172.16.99.22.515: Flags [S], seq 2162738421, win 29200, options [mss 1460,sackOK,TS val 1747727490 ecr 0,nop,wscale 7], length 0
12:39:38.963140 IP 172.16.99.22.515 > 172.16.224.68.60758: Flags [S.], seq 471312082, ack 2162738422, win 65535, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
12:39:38.963162 IP 172.16.224.68.60758 > 172.16.99.22.515: Flags [.], ack 1, win 229, length 0
12:39:38.963305 IP 172.16.224.68.60758 > 172.16.99.22.515: Flags [P.], seq 1:9, ack 1, win 229, length 8
	0x0000:  4500 0030 f079 4000 4006 aed2 ac10 e044  E..0.y at .@......D
	0x0010:  ac10 6316 ed56 0203 80e8 c4f6 1c17 a6d3  ..c..V..........
	0x0020:  5018 00e5 9b9e 0000 024d 4643 4c50 520a  P........MFCLPR.
                                     ^^^^^^^^^^^^^^^^^^^
the share name 'MFCLPR' is correct; 0x02 means: accept job for queue;

12:39:39.004919 IP 172.16.99.22.515 > 172.16.224.68.60758: Flags [.], ack 9, win 2053, length 0
	0x0000:  4500 0028 76bb 4000 8006 e898 ac10 6316  E..(v. at .......c.
	0x0010:  ac10 e044 0203 ed56 1c17 a6d3 80e8 c4fe  ...D...V........
	0x0020:  5010 0805 1428 0000 0000 0000 0000       P....(........
12:39:39.989869 IP 172.16.99.22.515 > 172.16.224.68.60758: Flags [P.], seq 1:2, ack 9, win 2053, length 1
	0x0000:  4500 0029 7711 4000 8006 e841 ac10 6316  E..)w. at ....A..c.
	0x0010:  ac10 e044 0203 ed56 1c17 a6d3 80e8 c4fe  ...D...V........
	0x0020:  5018 0805 131f 0000 0100 0000 0000       P.............
                                     ^^
the LPD service denies with 0x01;

12:39:39.989891 IP 172.16.99.22.515 > 172.16.224.68.60758: Flags [F.], seq 2, ack 9, win 2053, length 0

Any ideas?

	matthias
-- 
Matthias Apitz, ✉ guru at unixarea.de, http://www.unixarea.de/ +49-176-38902045
Public GnuPG key: http://www.unixarea.de/key.pub