Policy Routing: dst_entry Lookup in Linux kernel

Previously I examined IPv6 packet flow in Linux kernel for MIPv6 signaling and data communication. Later, I had to focus to policy routing. I need to find the way, how dst_entry have looked up. The following graph shows how works Policy routing in Linux kernel.

Download: dst_entry-v2.1.pdf

Detailed explanation of version 2.1: Policy routing details

Revision log:

  • 1.0
  • 2.0
    • Extend graph with lookup process of the routing entry itself
    • New entry point: IP6IP6 tunnel transmission
  • 2.1
    • Add fib6 tree-node-info architecture

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