TLS for the MQTT connection (iteration 2, step 5)

ca_file or the system's CAs (MOSQ_OPT_TLS_USE_OS_CERTS), client
certificate, broker certificate and host name verified, settings errors
reported before connecting. The client thread blocks SIGPIPE: with TLS,
a write to a connection the broker closed killed the process. The
reason of a failed handshake (libmosquitto's log) is appended to the
error. tst_mqtt covers TLS with test certificates in tests/data (D44).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
2026-10-06 16:29:32 +02:00
co-authored by Claude Opus 5.5
parent 943e90c1b1
commit 148ae663cf
14 changed files with 336 additions and 16 deletions
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-----BEGIN CERTIFICATE-----
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gBRLda21NY4WNcdtMQUU20dpFjzLxTAPBgNVHRMBAf8EBTADAQH/MAoGCCqGSM49
BAMCA0gAMEUCIQCcWQf7cejgQw+xzZ/oDgUVSQ2s73wZ/N+b/XxD2goUswIgS/Y5
HeqcBO4HHqOVLbwRMhCWYbQlAhiLpaX26wyzIyM=
-----END CERTIFICATE-----