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Add Connection error callback to fix issue 1148 #1442

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Ivan-Bolshakov
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Added a callback message with an error connecting to the broker. This message is sent during all connection and reconnection attempts (including automatic reconnection attempts).
This MR solves problems #1148 and #1360

Signed-off-by: Ivan Bolshakov ivanvaxi@gmail.com

Signed-off-by: Ivan Bolshakov <ivanvaxi@gmail.com>
@Aposhian
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Looks good to me!

@Aposhian
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Do we want to consider adding this to MQTTAsync_setCallbacks? Or do we want to not do that in order to not change ABI compatibility?

src/MQTTAsync.h Outdated Show resolved Hide resolved
@Aposhian
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I have tested this and confirmed it to work. I created initial support on the C++ client for using this API: https://github.com/fireflyautomatix/paho.mqtt.cpp/tree/connection-error-callback

@Ivan-Bolshakov
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@Aposhian @jumoog Thank you for your review!
@icraggs Could you please watch this MR when you have time?

@icraggs icraggs added this to the 1.4.0 milestone Apr 3, 2024
@icraggs icraggs linked an issue Apr 3, 2024 that may be closed by this pull request
@icraggs icraggs removed a link to an issue Apr 3, 2024
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icraggs commented Apr 3, 2024

I don't think we want to add it to set callbacks, as that would cause some backward incompatibilities which we could manage, but is more complicated. As it is, as it is an interface change, I think it has to go into the 1.4 stream.

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4 participants