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SubjectHowto munge packets?
We have a project that requires intercepting certain IP packets,
modifying their payload, and sending them on their way. The
modification is nontrivial, and so I think it would best be done in
user space. Can anyone suggest a general approach for how to
intercept packets, send them to user space, and then on to their
destination? Should we look at netfilter/netlink? I'd like to avoid
any kernel code.

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