Date: Wed, 07 Oct 2009 21:42:27 +0500 From: rihad <rihad@mail.ru> To: Julian Elischer <julian@elischer.org> Cc: freebsd-net@freebsd.org, Oleg Bulyzhin <oleg@FreeBSD.org> Subject: Re: dummynet dropping too many packets Message-ID: <4ACCC4F3.3030302@mail.ru> In-Reply-To: <4ACCC30E.7080504@elischer.org> References: <4AC8A76B.3050502@mail.ru> <20091007085902.GA88982@lath.rinet.ru> <4ACC5E23.8090405@mail.ru> <20091007100503.GB88982@lath.rinet.ru> <4ACC6A7B.5050808@mail.ru> <20091007104525.GC88982@lath.rinet.ru> <4ACC7308.6070301@mail.ru> <4ACCC30E.7080504@elischer.org>
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Julian Elischer wrote:
> rihad wrote:
>> Oleg Bulyzhin wrote:
>
>> You probably have some special sources of documentation ;-) According
>> to man ipfw, both "netgraph/ngtee" and "pipe" decide the fate of the
>> packet unless one_pass=0. Or do you mean sprinkling smart skiptos here
>> and there? ;-)
>>
>
> ngtee should not have any affect on the packet.. it takes a copy..
>
That's a logical conclusion, although I prefer trusting the man at hand
(pun intended) if I haven't tested it myself to see how it works:
ngtee cookie
A copy of packet is diverted into netgraph, original packet is
either accepted or continues with the next rule, depending on
net.inet.ip.fw.one_pass sysctl variable. See ng_ipfw(4)
for more
information on netgraph and ngtee actions.
Although... I've a question to Mr. Oleg:
> 2) use 'tee' rule with ng_ksocket & ng_netflow
tee port
Send a copy of packets matching this rule to the divert(4)
socket
bound to port port. The search continues with the next rule.
how is it different from one_pass=0? Both tee and ngtee w/ one_pass=0
continue with the next rule.
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