[Bug 149225] New: - Can't connect to CUPS server in mixed ipv4/ipv6

[bugzilla-daemon@bugzilla.gnome.org]

http://bugzilla.gnome.org/show_bug.cgi?id=149225
gnome-print | gnome-cups-manager | Ver: unspecified

           Summary: Can't connect to CUPS server in mixed ipv4/ipv6
           Product: gnome-print
           Version: unspecified
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gnome-cups-manager
        AssignedTo: jody@gnome.org
        ReportedBy: seb128@debian.org
                CC: pkg-gnome-maintainers@lists.alioth.debian.org


This bug has been reported in the Debian BTS: http://bugs.debian.org/217257

"When running gnome-cups-manager it displays the following error and exits:

The CUPS server could not be contacted.

I have done some debugging and research, and apparently the bug is
caused by gethostbyname. I'm using a 2.6 kernel with both ipv4 and
ipv6 support, and this seems to cause the troubles.

The call to gnome_program_init in main sets the RES_USE_INET6 flag in
_res.options. After that all calls to gethostbyname returns an ipv6
address instead of ipv4. The function httpConnectEncrypt in libcups2
doesn't like ipv6 addresses and fails and then gnome_cups_check_daemon
in libgnomecups also fails.

One quick fix is to reset the RES_USE_INET6 flag after the call to
gnome_program_init:

   _res.options &= ~RES_USE_INET6;"

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