OpenOSPFD - Design

Parent Process
Responsible for getting the routes into the kernel
Tracks interface link states
Synchronise the kernel routing table with the own copy

OSPF Engine
Listens on the raw IP socket
Verifies and processes the packets
Interface finite state machine
Neighbor finite state machine
Reliable flooding of LS updates (retransmits)

Route Decision Engine
Stores LS database
Calculates SPF tree
Redistribution of networks