Hi, I need to build a virtual network to test our program. We used Xen before migrating them to openvz. There are some patches I should make to the kernel. In net/ipv4/ip_output.c, before the packet is sent out, we need to do some operations on the packet. The problem is , I don't know the packet belongs to which openvz node. It would be easy to distinguish them in user space but we need to know them in kernel space. Is there some data structure in kernel space containing this kind of information. Please give me some suggestions! Thanks a lot!
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