Re: [Linux-ATM-General] General doubt in ATM

[Giampaolo T. <Gia...@To...>]

> Hi
> 
> Is that possible to find what is the VPI and VCI value of a received
> cell from the trailer or by another means ?.
> 
> 1. Suppose in real time if the receiver does not know by what vpi/vci
> value the transmitter is sending then how to find from the received
> cells ?
>
> 
> 2. Another query is In ethernet reception we can say broadcast address
> and it will receive from any address. Similarly is there any option to
> open aread such that it will receive cell of any vpi/vci value ?

You should probably try opening an ATM_AAL0 channel on
ATM_VPI_ANY/ATM_VCI_ANY (or ATM_VPI_UNSPEC/ATM_VCI_UNSPEC, can't readily say
which one of the two).

Then, *provided that your interface supports all this* you should start
getting 53-bytes (or 52-bytes, again depending on interface) bytes cells.

Please note that, even if your interface doesn't "burps" on your setup, it
may change some of the fields in the header before yielding them to you.

Also note you may start getting idle-cells too, so beware. And also setup
your fingers to a ^C...

Giampaolo

> Thanks
> Mahendra