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@xxxxxxxxxxxxxxxxxxx
LUGA : http://www.luga.at
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