[Qt-interest] QUdpSocket datagram, how to get the whole package

[Marco Borm]

As already written UDP uses a IP not a MAC to address the communication 
peer. It is possible to map a IP with a MAC using the ARP protocol, but 
the MAC you will get isn't always the MAC of the PC you talking with. 
For example if there is a IP-router between two networks every device on 
a side will only see the MAC of the router but never the real MAC of a 
device on the other side.

So if you still want the MAC, check if there is some API to access the 
arp-table or directly access "/proc/net/arp" on linux.


Marco

Patric wrote:
> Anyone ? :/
>
>     ----- Original Message -----
>     *From:* Patric <mailto:userqt at gmail.com>
>     *To:* qt-interest at trolltech.com <mailto:qt-interest at trolltech.com>
>     *Sent:* Saturday, June 06, 2009 5:35 PM
>     *Subject:* QUdpSocket datagram, how to get the whole package
>
>     Hello,
>     I'm sending UDP datagrams using QUdpSocket.
>     But now I need to get the MAC address of the device I'm querying.
>     Does anyone know how it can be done ?
>     If I get all the bytes in the package, I'll be able to extract the
>     MAC address. But QUdpSocket is encapsulating only the UDP part as
>     viewable.
>      
>     Patric
>
>
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