Re: HEADSUP! netgraph Metadata changing.

From: Gleb Smirnoff (glebius_at_cell.sick.ru)
Date: 06/07/04

  • Next message: Ruslan Ermilov: "Re: HEADSUP! netgraph Metadata changing." 
    Date: Mon, 7 Jun 2004 11:44:10 +0400
To: Ruslan Ermilov <ru@freebsd.org>

    On Mon, Jun 07, 2004 at 10:38:12AM +0300, Ruslan Ermilov wrote:
    R> On Mon, Jun 07, 2004 at 11:17:01AM +0400, Gleb Smirnoff wrote:
    R> > On Sun, Jun 06, 2004 at 06:35:51PM -0700, Julian Elischer wrote:
    R> > J> In addition the ng_ksocket node adds info into metadata and I suspect
    R> > J> there are people using that.
    R> >
    R> > Since ng_ksocket tags packets for itself only, we can safely change it.
    R> >
    R> I use this feature in one proprietary module (need to send/recevive
    R> UDP datagrams to/from different destinations).

    Does your module reads/writes meta? Or just forwards the meta? If it just
    forwards meta, does it allocate new mbuf? If it does, then you should copy
    tag from old mbuf to a new one. If it does not allocate new mbuf, than
    our ng_ksocket change won't break your module. 

    -- 
Totus tuus, Glebius.
GLEBIUS-RIPN GLEB-RIPE
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  • Next message: Ruslan Ermilov: "Re: HEADSUP! netgraph Metadata changing."

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