1.2.3 release

Updates since 1.2.2:

• Inspector: Extend template backend to write EDNS OPT codes
• Update m4 macros to remove build warnings on Ubuntu Jammy
• Inspector: Update pseudoanonymisation code for OpenSSL 3.0 to remove warnings
  about deprecated functions on Ubuntu Jammy

1.2.3-rc2

• Update m4 macros to remove build warnings on Ubuntu Jammy
• Inspector: Update pseudoanonymisation code for OpenSSL 3.0 to remove warnings
  about deprecated functions on Ubuntu Jammy

1.2.3-rc1

• Inspector: Extend template backend to write EDNS OPT codes

1.2.2 release

Updates since 1.2.1:

• Provide a mechanism to force a C-DNS file rollover via a SIGUSR1 signal to
  compactor (when capturing from a network interface or DNSTAP). See
  KNOWN ISSUES for more info on file rollover issues. This change
  does not effect PCAP file rollovers. NOTE: this can result in a C-DNS file
  containing no DNS messages being produced.
• Align DNSTAP stats logging better with network capture stats logging
• Update Catch from 2.13.2 to 2.13.9 (Thanks LeSuisse)
• Minor documentation updates

1.2.2-rc1

• Extend SIGUSR1 mechanism to DNSTAP capture
• Align DNSTAP stats logging better with network capture stats logging
• Various minor updates to documentation

1.2.2-beta1 release

• Provide a mechanism to force a C-DNS file rollover via a SIGUSR1 signal to
  compactor. See KNOWN_ISSUES for more info on file rollover issues. This change
  does not effect PCAP file rollovers. NOTE: this can result in a C-DNS file
  containing no DNS messages being produced.
• Update Catch from 2.13.2 to 2.13.9 (Thanks LeSuisse)

1.2.1 release

• Updates:

  • New sampling mode option available when compactor is overloaded
    • Sampling of captured packets can be enabled at a specified rate for a
      specified time when packet drops exceed a specified threshold
      (see config options for more details). This option is disabled by default.
  • The behaviour of the internal sniffer channel is improved when compactor is
    overloaded to provide better reporting and management of dropped/sampled of packets
    • This fixes a bug where the Total Packets processed statistic did not
      include any packets dropped during overload and so under reported load
  • Add new statistics to C-DNS: sniffer drops, matcher drops and sampling discards,
    and 3 libpcap stats. The libpcap stats should not be considered reliable and
    provided for information only.
  • Bump the private version because C-DNS schema extended with new statistics.
  • The behaviour of compactor is changed when an interrupt (SIGINT, SIGTERM)
    is received e.g. when the service is restarted or a user enters ^C.
    Previously all of the in progress C-DNS compression was aborted and all of
    the in progress output files (compressed and uncompressed) were removed. Now
    the .raw uncompressed output file is left on disk so it can be manually
    recovered (i.e. renamed and compressed). Users will now need to choose how to
    managed these uncompressed files. Behaviour on SIGHUP (re-reading of config
    file without affecting any in progress compression) is unchanged.

• Logging:

  • New log-file-handing option to log low level details of file
    processing on file rotation and compression. This aids with debugging of file
    processing problems and measurement of C-DNS file compression times.
  • New -D option (relaxed-mode). With this option a warning (not an error) is
    issued for unrecognized command line and config file options.
  • Additional default logging is added when file rotation occurs, when
    compression is aborted, and to report the specific interrupt received by
    compactor.
  • Improve log-interval statistics output and add additional statistics.

• Minor updates/bug fixes:

  • Modify the format output by the debug option --debug-qr to be more human
    readable (--debug-dns output is left unchanged).
  • Fix file durations for files with more than one C-DNS block in them so high
    traffic rates can be correctly calculated from the statistics.
  • Constrain size of matcher queue to reduce memory consumption when
    dropping/sampling.
  • Fix 2 minor bugs where an incorrect start time could be written to the CDNS
    file, resulting in a negative file duration.
  • Fix build issue when using configure --disable-pseudo-anonymisation. Thanks
    Sean Burford for reporting this.
  • Add example docker image as a submodule in contrib/dns-stats-docker. Thanks
    to Sean Burford for providing this.

• Documentation:

  • Minor documentation update to address #80
  • Text added in the documentation to clarify time patterns are needed in file
    output patterns for filename based file rotation to occur (based on the
    rotation-period option).
  • Correct the dependency list.

1.2.1-rc2

• The behaviour of compactor is changed when an interrupt (SIGINT, SIGTERM)
  is received e.g. when the service is restarted or a user enters ^C.
  Previously all of the in progress C-DNS compression was aborted and all of
  the in progress output files (compressed and uncompressed) were removed. Now
  the .raw uncompressed output file is left on disk so it can be manually
  recovered (i.e. renamed and compressed). Users will now need to choose how to
  managed these uncompressed files. Behaviour on SIGHUP (re-reading of config
  file without affecting any in progress compression) is unchanged.
• Additional default logging is added of the specific signal received by
  compactor, when file rotation occurs and when compression is aborted.
• New log-file-handing option to log low level details of file
  processing on file rotation and compression. This aids with debugging of file
  processing problems and measurement of C-DNS file compression times.
• Text added in the documentation to clarify time patterns are needed in file
  output patterns for filename based file rotation to occur (based on the
  rotation-period option).
• Fix a bug relating to compactor start_time handling introduced in rc1.

1.2.1-rc1

• Modify the format output by the debug option --debug-qr to be more human
  readable (--debug-dns output is left unchanged).
• Fix 2 minor bugs where an incorrect start time could be written to the CDNS
  file, resulting in a negative file duration.
• Documentation: correct the dependency list.
• Fix build issue when using configure --disable-pseudo-anonymisation. Thanks
  Sean Burford for reporting this.
• Add example docker image as a submodule in contrib/dns-stats-docker. Thanks
  to Sean Burford for providing this.

1.2.1-beta1

• Change behaviour of internal sniffer channel when overloaded to better
  report and manage dropping/sampling of packets
  • This fixes a bug where the 'Total Packets processed' statistic did not
    include any packets dropped during overload
• Improve log-interval statistics and packet drop logging
• EXPERIMENTAL: New sampling mode option (disabled by default)
  • sampling can be enabled at a specified rate for a specified time
    when packet drops exceed a specified threshold (see config options)