[lwip-devel] [patch #9726] mDNS: probe rate limiting if more then 15 conflicts occur in a 10 second period

[Jasper Verschueren]

URL:
  <https://savannah.nongnu.org/patch/?9726>

                 Summary: mDNS: probe rate limiting if more then 15 conflicts
occur in a 10 second period
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: jasperv
            Submitted on: Mon 19 Nov 2018 11:40:25 AM CET
                Category: apps
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None

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Details:

Functionality:
According to RFC6762 section 8.1: If fifteen conflicts occur within any
ten-second period, then the host MUST wait at least five seconds before each
successive additional probe attempt.

Implementation:
By keeping a list of timestamps of conflicts we can easily check if 15
conflicts occurred in a 10 second time window without the need of timers.
When it does, we will change the probe wait time on restart from 0-250ms to 5
seconds.




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File Attachments:


-------------------------------------------------------
Date: Mon 19 Nov 2018 11:40:25 AM CET  Name:
0001-mDNS-probe-rate-limiting-if-more-then-15-conflicts-o.patch  Size: 6KiB  
By: jasperv

<http://savannah.nongnu.org/patch/download.php?file_id=45490>

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