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accept_filter, accf_http, setsockopt and the EINVAL error
I've been tracking down the cause of the
[warn] (22)Invalid argument: Failed to enable the 'httpready' Accept Filter
when pkgsrc/www/apache22 starts up. It looks like apache does two identical
calls on each socket when adding the "httpready" filters. The first one
succeeds, the second one fails with an EINVAL error. This brings up two
issues (ignoring the question of apache's behavior):
(1) It seems to me that adding the "httpready" filter a second time is not
really an error and I'm wondering if setsockopt could be modified to silently
ignore the second attempt.
(2) I'm unable to find a documented cause for the EINVAL. Neither the
setsockopt(2) nor the accf_http(9) mention this error. Seems like at least
set sockopt should mention it.
This is on amd64 current but I believe this applies to NetBSD 5 as well.
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