Problem statement: You want to debug and track a single packet through the entire system and understand delays etc?
Solution: This is a simple trick that can help in the debugging.
- Insert a sequence number in the skb so that it is accessible from all layers.
- Print timestamp for this one across all layers.
- Using this to track and print packets irrespective of protocol headers and sequences inside.
This way the packet can now be tracked through the entire system.
