https://gitlab.synchro.net/main/sbbs/-/commit/0655a1fff673771dfe0d01f2
Modified Files:
src/sbbs3/js_mqtt.c
Log Message:
New MQTT properties: error, error_str, library

A little more visiblity into the MQTT library (version, function return values)

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https://gitlab.synchro.net/main/sbbs/-/commit/45ac901687848c9012e129a5
Modified Files:
src/sbbs3/js_mqtt.c
Log Message:
Add subscribe support

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https://gitlab.synchro.net/main/sbbs/-/commit/dec455488c7c24727d45ddc8
Modified Files:
src/sbbs3/js_mqtt.c
Log Message:
Fix memory leak on destruction when all received messages were not read

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https://gitlab.synchro.net/main/sbbs/-/commit/8bc1a5b6aedb7373c9d0cced
Modified Files:
src/sbbs3/js_mqtt.c
Log Message:
mosquitto_loop_stop() can block even when force=true

Contrary to https://mosquitto.org/api/files/mosquitto-h.html#mosquitto_loop_stop, passing force=true is not enough for the mosquitto network thread to end, mosquitto_disconnect() must be called.

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https://gitlab.synchro.net/main/sbbs/-/commit/c85e735955e7d8403e2b9784
Modified Files:
src/sbbs3/js_mqtt.c
Log Message:
Report (via exception) more potential failures in MQTT constructor

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https://gitlab.synchro.net/main/sbbs/-/commit/d8454a483f56d10b65a7c4e9
Modified Files:
src/sbbs3/js_mqtt.c
Log Message:
Add subscibe_qos property (exposes/overrides default subscribe QoS)

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https://gitlab.synchro.net/main/sbbs/-/commit/10993a6fd461e6094b830db9
Modified Files:
src/sbbs3/js_mqtt.c
Log Message:
We need to pass force=false to mosquitto_loop_stop()

... or else any pending published messages aren't sent.

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https://gitlab.synchro.net/main/sbbs/-/commit/3a389c0ca6d2b8db6ce07a2b
Modified Files:
src/sbbs3/js_mqtt.c
Log Message:
Fix heap corruption in Windows builds

This bug caused crashes in the Windows build of sbbs when using the ;spy
sysop command with MQTT enabled.

Memory that is allocated in one DLL (e.g. sbbs.dll) must be freed in that same DLL (e.g. sbbs.dll, not mosquitto.dll).

mosquitto_message_free() here frees the msg pointer, but we didn't allocate
it in mosquitto.dll in the first place, so that's wrong. The proper mosquitto function to use in this case is mosquitto_message_free_contents().

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