Re: dummynet setting ifp pointer in mbuf?

From: Jeremie Le Hen (jeremie_at_le-hen.org)
Date: 11/04/04

  • Next message: Andre Oppermann: "Re: dummynet setting ifp pointer in mbuf?" 
    Date: Thu, 4 Nov 2004 15:02:17 +0100
To: Guido van Rooij <guido@gvr.org>

    Hi Guido,

    this is a known problem on RELENG_4, there is an existing patch [1] for
    this in the PR database.

    Which version of FreeBSD are you using ? I don't know if this problem
    has been corrected in RELENG_5.

    [1] http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/61685

    Regards,
    Jeremie

    On Thu, Nov 04, 2004 at 01:16:02PM +0100, Guido van Rooij wrote:
    >
    > I am having problems combining ipf's ipnat rules with dummynet. The
    > reason is that if I use dummmynet queues configured to
    > be used outbound (queue .... out xmit if), then ipnat starts
    > applying rewriting of RDR rules on the wrong interface.
    >
    > e.g.:
    > firewall has 2 interfaces: if0 and if1
    > if i say:
    > rdr from any to 1.2.3.4 port 22 -> 2.2.3.4 port 2222
    > then ipfilter should rewrite incoming packets on if0 (and
    > outgoing packets as well).
    > With a dummynet rule like
    > queue 2 tcp from any 22 to any out xmit if0
    > ipf starts rewriting on if1, which leads to blocked packets as
    > the rewritten packet does not match the state entry for the connection.
    >
    > When looking in the dummynet source I see (rev 1.75, line 1190):
    > pkt->ifp = fwa->oif;
    > So it seems the queued packets interface is set to the outgoing interface.
    > But according to me, that is wrong.
    >
    > Can a dummynet expert verify if my analysis is correct or come up
    > with a real explanation if not?
    >
    > -Guido 

    -- 
Jeremie Le Hen
jeremie@le-hen.org
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  • Next message: Andre Oppermann: "Re: dummynet setting ifp pointer in mbuf?"

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