Re: Netgraph, meta and socket PF_NG

From: Julian Elischer (julian_at_elischer.org)
Date: 07/24/03

  • Next message: Vincent Jardin: "Re: Netgraph, meta and socket PF_NG" 
    Date: Thu, 24 Jul 2003 11:26:46 -0700 (PDT)
To: Vincent Jardin <vjardin@wanadoo.fr>

    you are correct

    My plan was to use the metadata part of recvmesg()
    to transfer metadata but never implemented it and it has not been
    needed.
    I suggest that you write a very simple node (start with ng_sample.c)
    that converts metadata to a 'header' prepends it to the data
    and then pass that up.

    Alternatively you could look at implementing the recvmesg()
    metadata transfer.

    On Thu, 24 Jul 2003, Vincent Jardin wrote:

    > With the regular data, I would like to send an opaque data from a netgraph
    > node to a userland program that has a NG_DATA/PF_NETGRAPH socket. This opaque
    > data is the meta.
    > How can it be performed ?
    >
    > Then, from the userland program, how to send data with an opaque to a
    > NG_DATA/PF_NG socket ? Then this opaque would be a netgraph's meta.
    >
    > It seems that ng_socket does not support this feature, however I am not sure
    > that I understand properly its source code. ;-(
    >
    > Thanks,
    > Vincent
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