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This question is i guess is more relevant when we have IP tunnels like GRE etc. When a packet traverses the networking stacks, each stack is allowed to manipulate the ...
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- 11-28-2007 #1
- Join Date
- Nov 2007
Question on sk_buff
Now, if a higher layer protocol stack wants to access information from an already processed lower layer, for example say GRE, is that information guaranteed to be present in the packet ?
An example of such a packet would be: ETH---IP-GRE---IP---My-Proto.