Geoip checks

Closes #778

See merge request !1407

Rrsig-refresh2

See merge request !1404

tests: fail if some test segfaults or killed

See merge request !1406

Replace defective conf_mix_iter() with conf_mix_iter_init()

See merge request !1405

Unreachable remotes

Closes #383

See merge request !1395

Remote groups

See merge request !1403

dnssec: rrsig-refresh: warn if too low

See merge request !1402

DS push: use DNSKEY TTL for parent DS

See merge request !1401

NSEC3 iterations defaults to 0

See merge request !1400

tests: scenario of alg roll with offline KSK

See merge request !1399

Robert Edmonds authored 3 years ago and Daniel Salzman committed 3 years ago

Previously, after "mod-dnstap: Restore the original query QNAME case",
the dnstap module would copy the original QNAME into the query packet
buffer passed to the dnstap module, so that the originally cased query
message would be written out to the dnstap logging stream.

However, there are error conditions that can result in the query
packet's 'qname_size' field being updated to a non-zero value (the
question section was successfully parsed), but the packet was ultimately
rejected.

In the prepare_answer() function in src/knot/nameserver/process_query.c,
there are several error return paths that prevent the 'orig_qname' field
from being written by the call to memcpy(). In this case, the
'orig_qname' field in the corresponding knotd_qdata_extra_t object will
remain at an initialized (zeroed out) value.

Before this patch, in some cases (e.g. in responses to some queries that
return FORMERR), mod-dnstap would overwrite the QNAME in the query
packet buffer with 'qname_size' bytes from the 'orig_qname' field. With
'qname_size' set to a non-zero value (due to successful parsing of the
QNAME) but with 'orig_qname' set to its original initialized (zeroed
out) value, this would result in zeroing out the QNAME in the query
packet buffer. This would then result in writing a corrupted query
message into the dnstap logging stream.

Since mod-dnstap writes directly to the query packet buffer rather than
making a copy, this corruption would also be visible to modules
executing after mod-dnstap as well as the rest of knotd.

This patch updates mod-dnstap's msg_query_qname_restore() so that it
avoids copying the original QNAME into the query packet buffer if the
'orig_qname' field has been left in its initialized (zeroed out) value.

fixes #777

Log the control command for all zones specified (not just the first one)

Closes #776

See merge request !1397