Date: Mon, 11 May 1998 12:07:08 +0200 (MET DST) From: Luigi Rizzo <luigi@labinfo.iet.unipi.it> To: current@FreeBSD.ORG, hackers@FreeBSD.ORG Subject: dummynet is working (more or less) Message-ID: <199805111007.MAA17553@labinfo.iet.unipi.it>
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The updated code for dummynet is available at
http://www.iet.unipi.it/~luigi/ip_dummynet/
i have it mostly working here on 2.2.6 -- differences with -current
should be not significant.
In order to make it work you need IPFW and IPDIVERT options in your
kernel.
There is one problem with the code, which I i am not sure how to fix
now:
in the call to ip_output, the caller passes a few parameters, including
a pointer to a "struct route" . The pointer is saved together with the
mbuf containing the packet, and used some time later when the packet is
extracted from the queue/delay line and passed to the interface. By
that time, the original data structure might have been deallocated :(
resulting in a panic or other weird behaviours.
I am not sure if the correct way to keep this info alive is to increase
reference count to this structure (to be cleared at a later time, but
the exact time might be tricky to find out, since i don't really want
to modify all low level drivers) or what else.
Suggestions welcome.
cheers
luigi
-----------------------------+--------------------------------------
Luigi Rizzo | Dip. di Ingegneria dell'Informazione
email: luigi@iet.unipi.it | Universita' di Pisa
tel: +39-50-568533 | via Diotisalvi 2, 56126 PISA (Italy)
fax: +39-50-568522 | http://www.iet.unipi.it/~luigi/
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