[Planetlab-users] vnet tap

[Samuel Lucas Vaz de Mello]

Hi!

	[Please reply with CC to me]

	I'm trying to use the new vnet's tap0 interface to build a overlay network.
	I wrote a simple program, just to test it. It reads the data 
from /dev/net/tun, swap IP source and destination and change the ICMP type 
from echo-request to echo-reply and write it back the tun file descriptor. 
	Using the "real" tun/tap driver (not the vnet's one) I'm able to "ping" any 
address that uses the interface tap0.
	Using the vnet's tap0 interface I read the data, swap source/destination and 
write it back to the fd. The write call return sucessfully but the data does 
not appear in the ping program. Using a small sniffer that uses libpcap for 
dumping all packages for the tap0 interface, it shows the ping requests but 
not the replies.
	There is any restriction for the data being sent through tap0 interface?

Thank you,

 - Samuel