From: bernd@petrovitsch.priv.at (Bernd Petrovitsch)
To: kernelnewbies@lists.kernelnewbies.org
Subject: Problem with a UDP server implements
Date: Tue, 18 Oct 2011 11:20:12 +0200 [thread overview]
Message-ID: <1318929612.20227.15.camel@thorin> (raw)
In-Reply-To: <CAOe6JY0ML9o5g=o9sYTD6cQg0DoXR06hns33=S1M8EMmyH5qgA@mail.gmail.com>
On Die, 2011-10-18 at 07:26 +0800, tao jiang wrote:
[....]
> Is it to create a SOCK_RAW socket for receieve and send?
Only for sending. Search for sourcecode for `ping` - there are
several around that show how to do it.
You can use recvfrom() to get the senders address for each packet.
[...]
> Will it cause performance problem, compare to SOCK_DGRAM?
IMHO that won't measurably - either user-space constructs the UDP and IP
header or the kernel does. And we talk about a few bytes only.
[ Don't top-post. ]
Bernd
--
Bernd Petrovitsch Email : bernd at petrovitsch.priv.at
LUGA : http://www.luga.at
next prev parent reply other threads:[~2011-10-18 9:20 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-14 17:51 Problem with a UDP server implements jiangtao.jit
2011-10-15 6:04 ` michi1 at michaelblizek.twilightparadox.com
2011-10-15 8:29 ` tao jiang
2011-10-15 9:01 ` michi1 at michaelblizek.twilightparadox.com
2011-10-15 9:50 ` tao jiang
2011-10-15 11:58 ` Bernd Petrovitsch
2011-10-17 23:26 ` tao jiang
2011-10-18 9:20 ` Bernd Petrovitsch [this message]
2011-10-18 14:48 ` tao jiang
2011-10-19 7:28 ` Bernd Petrovitsch
2011-10-21 13:07 ` tao jiang
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