Oct. 18, 2011
9:20 a.m.
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@petrovitsch.priv.at LUGA : http://www.luga.at