On Sam, 2011-10-15 at 01:51 +0800, jiangtao.jit wrote:
> Hi:
>
> I'm writing a UDP server and meet a problem
> the UDP server program is run on a box with single card but has multi ip:
> like eth0 10.0.0.1
> eth0:1 10.0.0.2
> eth0:2 11.0.0.1
>
> I bind the server socket with INADDR_ANY
>
> when a client send a packet to 10.0.0.2(the eth0:1 's ip)
> the server can recieve the packet and reply, but the client can't recieve the server's response
> I use wireshark to capture the response packet
> and found that the server use 10.0.0.1(the eth0 's ip) as saddr in the response packet
> I expected it to be 10.0.0.2 but it's not
> my question : is there any way to let the UDP server relpy just use the ip it receieved the request ?
> It's :
> when a client send a request to 10.0.0.1(eth0); the server use 10.0.0.1 to response
> and another client send a request to 10.0.0.2(eth0:1); the server use 10.0.0.2 to response
You can always build the complete raw packet (including the IP header)
yourself.
Bernd
--
Bernd Petrovitsch Email : bernd@xxxxxxxxxxxxxxxxxxx
LUGA : http://www.luga.at
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