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isSleeping() ARP Check Addition and ffMonitor() Updates For Client Broadcasts #660

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isSleeping() ARP Check Addition and ffMonitor() Updates For Client Broadcasts #660

wants to merge 4 commits into from

Commits on Aug 29, 2017

  1. ARP Table Check For Slow Clients 

    Updated isSleeping to check the Pi's ARP table for a client's MAC address.  If a client's MAC address is present in the ARP table *and* the client has responded to an ICMP ping request in the past 30 seconds, the client is marked as not sleeping.

Additionally, added logging statements to record when a client transitions from awake to sleep.
    @pmaag
    pmaag committed Aug 29, 2017
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  2. ffMonitor Updates Client Status 

    Updated the ffMonitor function to look for "i-can-play-ffm-udp" and "i-cannot-play-ffm-udp" from a client.  If either of those broadcast packets are received, we mark the client as awake.

This will help with older iOS hardware not responding via ICMP when their CPU gets busy.  iOS appears to stop replying to ICMP with high CPU, however packet captures have shown that the ForeFlight heartbeat broadcast packets are still sent during the high CPU times.
    @pmaag
    pmaag committed Aug 29, 2017
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  3. Revert "ffMonitor Updates Client Status" 

    This reverts commit 52043b5.
    @pmaag
    pmaag committed Aug 29, 2017
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  4. ffMonitor Updates Client Status 

    Updated the ffMonitor function to look for "i-can-play-ffm-udp" and "i-want-to-play-ffm-udp" from a client.  If either of those broadcast packets are received, we mark the client as awake.

This will help with older iOS hardware not responding via ICMP when their CPU gets busy.  iOS appears to stop replying to ICMP with high CPU, however packet captures have shown that the ForeFlight heartbeat broadcast packets are still sent during the high CPU times.
    @pmaag
    pmaag committed Aug 29, 2017
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