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dcc78517be
Replace the hand-rolled threaded socket server with the standard
AsyncDnsServer framework used by other ans.py servers in the test suite.
The DNS wire-format message builders (IXFR diff, AXFR, SOA, SERVFAIL)
are retained unchanged since they produce carefully crafted messages
needed to trigger the IXFR->AXFR race condition. The server
infrastructure is replaced:
- Manual TCP/UDP socket management and threading replaced by
AsyncDnsServer, which handles both protocols, pidfile lifecycle,
and signal handling.
- Query parsing replaced by the framework's dns.message-based parser;
query dispatch moved into IxfrRaceHandler.get_responses().
- The axfr_done_event threading.Event replaced by a boolean instance
variable on IxfrRaceHandler, safe within the single asyncio event
loop.
- For IXFR over TCP, the handler yields two BytesResponseSend actions
(msg1 then msg2) so the framework sends both with TCP length prefixes,
preserving the race-triggering sequence.
- For IXFR over UDP, the TC flag is set on the response to force TCP
retry.
- Unused encode_name_compressed() and parse_dns_query() removed.
Also fix a timing issue that might result in the initial transfer not
being done by the time the test is executed -- since ns11 is started
after ns6. Ensure the initial transfer has happened before running the
ixfr_race test.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
(cherry picked from commit
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| .. | ||
| startperf | ||
| system | ||
| testdata/wire | ||
| .gitignore | ||
| convert_trs_to_junit.py | ||
| Makefile.am | ||
| test_client.c | ||
| test_server.c | ||
| wire_test.c | ||