[Pkg-cups-devel] Bug#525910: cups fails to print with "400 Bad Request" -- ServerName, ServerAlias

[Wouter Van Hemel]

Package: cups
Version: 1.3.10-1
Severity: normal


Hello,

I've been getting "400 Bad Request" errors on CUPS clients and in the CUPS log file (after enabling debug-level logging).

I think the problem is this:

cupsdNetIFUpdate: "eth0" = hostname.domainname.local:631


Given an entry of...

192.168.196.7	hostname.domainname.local hostname

and a cupsd.conf ServerName of...

ServerName hostname
Listen 631


.... CUPS ties to 192.168.196.7 and hostname "hostname.domainname.local", subsequently refusing non-FQDN "hostname" in Host: headers.

I think this must have popped up in the most recent update. I also think that it's a bug. If ServerName is "hostname" (and this address resolves), CUPS should accept print jobs with that Host: header and not expect the FQDN hostname (which is usually made-up on local subnets anyway). It is absurd for CUPS not to accept print jobs to its own "ServerName".

Setting "ServerAlias *" gets CUPS printing again (presumably because it now accepts the mere "hostname"); so does removing "hostname.domainname.local" from /etc/hosts and just using the hostname without domainname.


In short, CUPS shouldn't require the FQDN to be used, especially if the ServerName is the non-FQDN; or it should perhaps create an automatic alias with both the FQDN and non-FQDN variant.


Thanks for your time,

  Wouter

-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)

Kernel: Linux 2.6.25
Locale: LANG=C, LC_CTYPE=en_GB.utf-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages cups depends on:
ii  adduser              3.110               add and remove users and groups
ii  bc                   1.06.94-3.1         The GNU bc arbitrary precision cal
ii  cups-common          1.3.10-1            Common UNIX Printing System(tm) - 
ii  debconf [debconf-2.0 1.5.26              Debian configuration management sy
ii  ghostscript          8.64~dfsg-1.1       The GPL Ghostscript PostScript/PDF
ii  libavahi-compat-libd 0.6.25-1            Avahi Apple Bonjour compatibility 
ii  libc6                2.9-7               GNU C Library: Shared libraries
ii  libcups2             1.3.10-1            Common UNIX Printing System(tm) - 
ii  libcupsimage2        1.3.10-1            Common UNIX Printing System(tm) - 
ii  libdbus-1-3          1.2.12-1            simple interprocess messaging syst
ii  libgcc1              1:4.3.3-8           GCC support library
ii  libgnutls26          2.6.5-1             the GNU TLS library - runtime libr
ii  libgssapi-krb5-2     1.6.dfsg.4~beta1-13 MIT Kerberos runtime libraries - k
ii  libijs-0.35          0.35-7              IJS raster image transport protoco
ii  libkrb5-3            1.6.dfsg.4~beta1-13 MIT Kerberos runtime libraries
ii  libldap-2.4-2        2.4.15-1.1          OpenLDAP libraries
ii  libpam0g             1.0.1-9             Pluggable Authentication Modules l
ii  libpaper1            1.1.23+nmu1         library for handling paper charact
ii  libpoppler4          0.10.6-1            PDF rendering library
ii  libslp1              1.2.1-7.5           OpenSLP libraries
ii  libstdc++6           4.3.3-8             The GNU Standard C++ Library v3
ii  lsb-base             3.2-22              Linux Standard Base 3.2 init scrip
ii  perl-modules         5.10.0-19           Core Perl modules
ii  procps               1:3.2.7-11          /proc file system utilities
ii  ssl-cert             1.0.23              simple debconf wrapper for OpenSSL
ii  ttf-freefont         20090104-2          Freefont Serif, Sans and Mono True
ii  xpdf-utils [poppler- 3.02-1.4            Portable Document Format (PDF) sui
ii  zlib1g               1:1.2.3.3.dfsg-13   compression library - runtime

Versions of packages cups recommends:
pn  avahi-utils               <none>         (no description available)
ii  cups-client               1.3.10-1       Common UNIX Printing System(tm) - 
ii  foomatic-filters          4.0-20090311-1 OpenPrinting printer support - fil
pn  smbclient                 <none>         (no description available)

Versions of packages cups suggests:
ii  cups-bsd                  1.3.10-1       Common UNIX Printing System(tm) - 
pn  cups-driver-gutenprint    <none>         (no description available)
ii  cups-pdf                  2.5.0-2        PDF printer for CUPS
ii  foomatic-db               20090301-2     OpenPrinting printer support - dat
ii  foomatic-db-engine        4.0-20090301-1 OpenPrinting printer support - pro
pn  hplip                     <none>         (no description available)
pn  xpdf-korean | xpdf-japane <none>         (no description available)

-- debconf information:
  cupsys/raw-print: true
  cupsys/backend: ipp, lpd, parallel, scsi, serial, socket, usb, snmp, dnssd