Ok thanks, this helps
Francois
----- Original Message -----
From: bill
To: 'Mailing list for lwIP users'
Sent: Friday, February 13, 2009 10:40 AM
Subject: RE: [lwip-users] Hello to mailinglist
In a nutshell, data going to and from the application is stored in memory
(either RAM or Flash). When the packet driver sends a packet, it sends the
payload part of the data from the same memory that the application provided to
be sent. When the packet driver receives data, the payload is passed to the
application in the same memory that it came in to from the MAC. There can be
significant improvement of program performance by not copying, especially when
sending or receiving lots of data. This is true from both ends of the spectrum
- low speed processors which take a lot of time to simply copy memory and very
high speed processors where a memory copy is slow because of the relatively
slow speed of memory and not because the speed of the processor.
Bill
From: [email protected]
[mailto:[email protected]] On Behalf Of
Francois Bouchard
Sent: Friday, February 13, 2009 10:16 AM
To: Mailing list for lwIP users
Subject: Re: [lwip-users] Hello to mailinglist
What exactly is zero-copy rx/tx?
----- Original Message -----
From: Piero 74
To: Mailing list for lwIP users
Sent: Friday, February 13, 2009 9:52 AM
Subject: Re: [lwip-users] Hello to mailinglist
I suppose I can post it as a patch on savannah. I forgot, I also
developed a driver for the on-chip FEC+PHY of FreeScale's MCF5223x. It
does zero-copy receive. I'll post it as well,
please notify me after post... i want to see your implementation for
zero-copy
as you know we had some discussions in mailing list regarding zero-copy rx
and also zero-copy tx
But filtering IP
addresses and ports in the driver would be straightforward, wouldn't
it? Just match the appropriate fields from IP header against the
whitelist.
yes, i know... i also suppose is simple...
but i wanted to know if other people has developed a similar feature...
i know that is not a robust protection against hacking attack, but it could
mitagate them,
and it could be an interesting feature for the marketing (just label on the
box: "built-in firewall")
thanks for your reply
bye
Piero
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