Release 2.12.0

This release fixes a segfault when doing DNS-over-HTTPS and changes the way maximum queries per second are handled.

The DNS-over-HTTPS module handled reconnecting incorrectly and destroyed the nghttp2 context during callbacks. Thanks to the help from @kgillis2000 it was quickly found and fixed.

The way maximum QPS is handled has been changed by Petr Špaček @pspacek (ISC). The new way solves an over-shoot problem that happened due to max QPS being counted for the whole runtime and based on completed queries, not just sent.

A new option qps_threshold_wait has also been added. This controls the threshold for using nanosleep() between sending packet and the default is measured on start-up. If the time between packets, based on max QPS -Q, is smaller then no sleep will be performed. This improves performance when doing high max QPS limiting.

Other changes:

• dnsperf: Statistics output
  • Fixed missing connection statistics if only reconnections happened
  • Flush output to allow pipe/grep processing
  • Add percentage on reconnections based on total connections
• Support OpenSSL 3.0+

Packages are available at: https://dev.dns-oarc.net/packages/

9aca046 OpenSSL 3.0
6d3d6b4 Stats, DoH
316f901 qps_threshold_wait
ed52770 WIP: use busy wait only if necessary
32229b6 WIP: import nanosleep benchmark
1842b88 Fix dnsperf -Q to not overshot target value