How to copy packet to another network card?
 

Hi!

Is there any way that can copy packets from a network card to another network card in a PC? Don't tell me use a hub, I need to this in software way in a PC!

For example, when wlan0 received a packet, how to copy that packet to wlan1, pretends it's wlan1 received that packet???

I already wrote a TARGET module for iptables to change IP destination.
For example, if wlan0 is 192.168.0.1, wlan1 is 192.168.1.1, I change every packets' (arrive at wlan0) IP destination to 192.168.1.1, but it's not working!! wlan1 didn't receive anything(checksum is correct). I check /proc/sys/net/ipv4/ip_forward is 1.

Could someone give me a hand? Thanks!:hattip:

Do you have two or more computers, one with wireless, and want to give the others wireless access by routing the traffic on the first computer?
Could you please give a more general description on what you are trying to accomplish.

Thanks for your respond :)

What I doing is: I split a video stream into 2 path(load sharing), 1st path end at wlan0, 2nd end at wlan1, wlan0 and wlan1 are in the same PC. But I can't combine these 2 stream together, because the video looks not smooth.

So, I try to copy wlan1's packet to wlan0, is there any way can do that?

Thank for help!

Look up bonding on Google. Both ends need to be configured for it and any switches & routers in between. You would be better off using gigabit NICs & switch. The CPU playing the stream may simply not be able to handle the video, in which case, bonding won't help.

I don't know if a bonded interface would split the traffic for a single connection or equalize different connections.

Hey! You inspire me! Thanks to you all! :hattip:
I find out iptables extensions ROUTE target patch can do this job!
Now everything works perfect now!
Thanks~ :)

Thank you for the feedback.