fix: keepalive issues#1855
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robertsLando
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Apr 30, 2024
| this.emit('packetsend', packet) | ||
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| // When writing a packet, reschedule the ping timer | ||
| this._shiftPingInterval() |
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The root cause of the problem
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Actually keepalive is shifted every time a packet is written to stream. This is wrong because in cases where there is a constant publish the keepalive never triggers as it keeps being shifted preventing the timeout to trigger and to close the client.
With this PR we ensure that the keep alive timer is shifted only when we receive control packets as defined in specs: https://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html#_Ref363645900
Fixes #1727