cdc_ecm: Truncate frames at max ethernet size #17200
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This truncates the incomming frames to ETHERNET_FRAME_LEN and silently discards the rest of the frame until the end of the frame. This should be modified to an endpoint halt condition after RIOT-OS#17090 is merged, but for now this should be good enough. Stalling the endpoint with the current stall implementation could cause a ping of death scenario, so for now the data is truncated until the above solution can be implemented.
bergzand
added
Type: bug
dylad
added
Reviewed: 1-fundamentals
dylad
approved these changes
Nov 15, 2021
dylad
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CI: ready for build
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Contribution description
This truncates the incomming frames to ETHERNET_FRAME_LEN and silently
discards the rest of the frame until the end of the frame. This should
be modified to an endpoint halt condition after #17090 is merged, but
for now this should be good enough.
Stalling the endpoint with the current stall implementation could cause
a ping of death scenario, so for now the data is truncated until the
above solution can be implemented.
(I've also removed an duplicate
USBOPT_EP_AVAILABLEcall)Testing procedure
The
tests/usbus_cdc_ecmapplication should still work on a platform of choice.Issues/PRs references
Reported in detail by @szymonh