Add netmap support for tun(4) interfaces
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Authored by giuseppe.lettieri_unipi.it on Aug 18 2020, 2:26 PM.

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	F166121583: D26102.id75945.diff
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Summary

This patch adds a couple of functions and hooks to allow the generic netmap driver to intercept packets coming from a tun(4) interface. The functionality is needed by people using netmap to interpose, e.g., Sensei or Suricata between VPN/PPPoE connections and the host stack.

Test Plan

Currently being tested by Sunny Valley Networks.