On 12/17/20 5:33 PM, Phillip Schichtel wrote:
> I also adjusted my java binding to handle the ERANGE error and
> everything works as expected with your patch applied. I'm using a
> buffer of 10 * sizeof(struct can_filter) now and realloc in case of
> ERANGE using the optlen. So with an unpatched kernel the API is
> currently restricted to the first 10 filters, but that's probably fine.

BTW: The current kernel has an arbitrary limit of 512 filters per socket:

#define CAN_RAW_FILTER_MAX 512
/* maximum number of can_filter set via setsockopt() */

regards,
Marc

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