# {{ ansible_managed }}
#
# CUPS on the label print proxy. The Pi does all the rendering, so macOS,
# Windows and Linux clients add the queue driverless over IPP Everywhere /
# AirPrint and never install a Phomemo driver.
#
# Reachable from the LAN and from the rescue access point only. Everything else
# is refused here and dropped again at nftables.

LogLevel warn
PageLogFormat
MaxLogSize 1m
# A label job is worth retrying: the printer is often powered off or out of
# stock when the job is submitted, and the default is to bin the job outright.
ErrorPolicy retry-job

# Only trusted, local networks reach this port -- see the Location blocks below
# and roles/labelprint/templates/nftables.conf.j2. Listening on all interfaces
# rather than a fixed address so the queue is still reachable at
# {{ labelprint_ap_addr }} when the Pi has fallen back to its rescue AP.
Listen 631
Listen /run/cups/cups.sock

# Advertise over Bonjour/mDNS so clients discover the queue by themselves.
Browsing On
BrowseLocalProtocols dnssd
# Dropping the _cups subtype is what makes macOS and iOS offer a driverless
# "AirPrint" add instead of guessing at a Generic PostScript driver.
BrowseDNSSDSubTypes _print,_universal

DefaultAuthType Basic
WebInterface Yes

<Location />
  Order allow,deny
  Allow from {{ labelprint_lan_cidr }}
  Allow from {{ labelprint_ap_cidr }}
  Allow from localhost
</Location>

<Location /admin>
  AuthType Default
  Require user @SYSTEM
  Order allow,deny
  Allow from {{ labelprint_lan_cidr }}
  Allow from {{ labelprint_ap_cidr }}
</Location>

<Location /admin/conf>
  AuthType Default
  Require user @SYSTEM
  Order allow,deny
  Allow from {{ labelprint_lan_cidr }}
  Allow from {{ labelprint_ap_cidr }}
</Location>

<Location /admin/log>
  AuthType Default
  Require user @SYSTEM
  Order allow,deny
  Allow from {{ labelprint_lan_cidr }}
  Allow from {{ labelprint_ap_cidr }}
</Location>

<Policy default>
  JobPrivateAccess default
  JobPrivateValues default
  SubscriptionPrivateAccess default
  SubscriptionPrivateValues default

  # Anyone on the LAN may print and manage their own jobs -- this is a label
  # printer in a workshop, not a shared office device with quotas.
  <Limit Create-Job Print-Job Print-URI Validate-Job>
    Order deny,allow
  </Limit>

  <Limit Send-Document Send-URI Hold-Job Release-Job Restart-Job Purge-Jobs Set-Job-Attributes Create-Job-Subscription Renew-Subscription Cancel-Subscription Get-Notifications Reprocess-Job Cancel-Current-Job Suspend-Current-Job Resume-Job Cancel-Jobs CUPS-Authenticate-Job Close-Job CUPS-Move-Job Cancel-My-Jobs CUPS-Get-Document>
    Order deny,allow
  </Limit>

  # Changing the printer itself needs a local admin.
  <Limit Pause-Printer Resume-Printer Enable-Printer Disable-Printer Pause-Printer-After-Current-Job Hold-New-Jobs Release-Held-New-Jobs Deactivate-Printer Activate-Printer Restart-Printer Shutdown-Printer Startup-Printer Promote-Job Schedule-Job-After Cancel-Job CUPS-Accept-Jobs CUPS-Reject-Jobs>
    AuthType Default
    Require user @SYSTEM
    Order deny,allow
  </Limit>

  <Limit CUPS-Add-Modify-Printer CUPS-Delete-Printer CUPS-Add-Modify-Class CUPS-Delete-Class CUPS-Set-Default>
    AuthType Default
    Require user @SYSTEM
    Order deny,allow
  </Limit>

  <Limit All>
    Order deny,allow
  </Limit>
</Policy>