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Bug 970809 - cupsd fails to start if configured to listen on not-yet-configured IP addresses
Summary: cupsd fails to start if configured to listen on not-yet-configured IP addresses
Alias: None
Product: Fedora
Classification: Fedora
Component: cups
Version: 18
Hardware: i686
OS: Linux
Target Milestone: ---
Assignee: Tim Waugh
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2013-06-05 00:49 UTC by Frantisek Hanzlik
Modified: 2015-02-10 14:17 UTC (History)
11 users (show)

Fixed In Version: cups-1.7-0.7.b1.fc20
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2014-02-05 23:10:51 UTC
Type: Bug

Attachments (Terms of Use)

Description Frantisek Hanzlik 2013-06-05 00:49:49 UTC
Description of problem:
When specify network interfaces in /etc/cups/cupsd.conf in 'Listen' directive (e.g.
Listen localhost:631
then after system boot I will get cupsd listening only on loopback. Merging messages and cupsd logs according to time I have some as:

Jun  5 01:44:00 klempak kernel: [    0.652548] loop: module loaded
Jun  5 01:44:00 klempak kernel: [    8.054364] e100 0000:07:00.0 eth0: addr 0xe0125000, irq 21, MAC addr 00:d0:b7:55:1a:b3
Jun  5 01:44:00 klempak kernel: [    8.078727] e100 0000:07:01.0 eth1: addr 0xe0124000, irq 22, MAC addr 00:02:b3:bb:7f:e3
Jun  5 01:44:00 klempak kernel: [    8.323997] e1000e 0000:00:19.0 eth2: (PCI Express:2.5GT/s:Width x1) 00:19:d1:e0:ef:c0
Jun  5 01:44:00 klempak kernel: [    8.325961] e1000e 0000:00:19.0 eth2: Intel(R) PRO/1000 Network Connection
Jun  5 01:44:00 klempak kernel: [    8.327943] e1000e 0000:00:19.0 eth2: MAC: 6, PHY: 6, PBA No: FFFFFF-0FF
Jun  5 01:44:01 klempak network[827]: Aktivování rozhraní loopback:  [  OK  ]

I [05/Jun/2013:01:44:02 +0200] Full reload complete.
I [05/Jun/2013:01:44:02 +0200] Cleaning out old files in "/var/spool/cups/tmp"...
I [05/Jun/2013:01:44:02 +0200] Cleaning out old files in "/var/cache/cups"...
E [05/Jun/2013:01:44:02 +0200] Unable to open listen socket for address [v1.::1]:631 - Address family not supported by protocol.
I [05/Jun/2013:01:44:02 +0200] Listening to on fd 11...  
E [05/Jun/2013:01:44:02 +0200] Unable to bind socket for address - Cannot assign requested address.
E [05/Jun/2013:01:44:02 +0200] Unable to bind socket for address - Cannot assign requested address.
I [05/Jun/2013:01:44:02 +0200] Listening to /var/run/cups/cups.sock:631 on fd 3...
I [05/Jun/2013:01:44:02 +0200] Resuming new connection processing...

Jun  5 01:44:04 klempak kernel: [   16.085595] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
Jun  5 01:44:04 klempak network[827]: Aktivuji rozhraní eth0:  [  OK  ]
Jun  5 01:44:07 klempak kernel: [   19.077266] e100 0000:07:01.0 eth3: NIC Link is Up 100 Mbps Full Duplex
Jun  5 01:44:07 klempak network[827]: Aktivuji rozhraní eth2:  [  OK  ]
Jun  5 01:44:09 klempak network[827]: Aktivuji rozhraní eth3:  [  OK  ]

As is evident, cupsd tries bind to interface address several seconds before they are inicialized (e.g. 7 seconds before is initialized eth3).

Version-Release number of selected component (if applicable):

How reproducible:
Always - for five reboots I have no successful cupsd start with listening on all interfaces.

Additional info:
Interfaces are started by '/etc/init.d/network' script

Comment 1 Michal Schmidt 2013-06-05 09:55:46 UTC
Please avoid expletives.

As a general rule, please always file service-specific issues against the service's package at first, because in most cases that's where the bug is.

[Reassigning to cups.]

To cups maintainers:
Could cups use the IP_FREEBIND socket option (man 7 ip)? It would allow it to start listening regardless of the current state of the network interfaces.

To the reporter:
As a workaround, you can add the "After=network.target" ordering dependency to cups.service, for example by saving this fragment as /etc/systemd/system/cups.service.d/workaround.conf :


Comment 2 Tim Waugh 2013-06-20 11:02:50 UTC
I'm building cups-1.7-0.7.b1.fc20 in rawhide with the change to use IP_FREEBIND.  If there are no problems with it we can consider back-porting that to released versions later.

Comment 3 Fedora End Of Life 2013-12-21 15:32:35 UTC
This message is a reminder that Fedora 18 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
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bug reports from releases that are no longer maintained. At that time
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Comment 4 Fedora End Of Life 2014-02-05 23:10:51 UTC
Fedora 18 changed to end-of-life (EOL) status on 2014-01-14. Fedora 18 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

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