lwIP - A Lightweight TCP/IP stack - Bugs: bug #55253, SNTP retry next server instantly...
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bug #55253: SNTP retry next server instantly result as a flood of NTP request
Submitter: | Georges Palauqui <gptechinno> | ||
Submitted: | Thu 20 Dec 2018 09:49:42 AM UTC | ||
Category: | apps | Severity: | 3 - Normal |
Item Group: | Faulty Behaviour | Status: | Fixed |
Privacy: | Public | Assigned to: | goldsimon |
Open/Closed: | Closed | Planned Release: | None |
lwIP version: | git head |
Wed 30 Jan 2019 07:43:22 PM UTC, comment #1: |
Simon Goldschmidt <goldsimon> |
Thu 20 Dec 2018 09:49:42 AM UTC, original submission:
In case SNTP_SUPPORT_MULTIPLE_SERVERS, when all servers NTP declared are available on network, but theirs stratum is in Kiss of Death (so the different requests are replied instantly with KOD), the sntp_try_next_server function instantly launch the next request which result in a flood of requests/replies on the network.
|
Georges Palauqui <gptechinno> |
Depends on the following items: None found
Items that depend on this one: None found
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Follow 5 latest changes.
Date | Changed by | Updated Field | Previous Value | => | Replaced by |
---|---|---|---|---|---|
2019-01-30 | goldsimon | Status | None | Fixed | |
Assigned to | None | goldsimon | |||
Open/Closed | Open | Closed | |||
2018-12-20 | gptechinno | Attached File | - | Added sntp.patch, #45702 | |
Carbon-Copy | - | Added -email is unavailable- |
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Corresponding source code
Does this patch really work? It prevents the flooding, but does it ever stop the loop of sending new requests?
I've pushed a patch obeying the KoD instead that prevents using that server again. So you'll get a short flood to all servers and then no more packets.