- A Hybrid Wireless architecture

Netfilter next up previous contents
Next: Routing and Interaction of Up: Module Architecture Previous: Module Architecture   Contents


Figure 4.1: Overview of the Netfilter Architecture.
Overview of Netfilter Architecture

Netfilter is framework which provides a series of hooks at various points in a networking protocol stack, as shown in Figure 4.1. The Netfilter sub-system provides packets at each of these hooks in the sk_buff data structure [12].

sk_buff is a control structure with a block of memory attached. The primary goal of sk_buff data structure and associated routines is to provide a consistent and efficient buffer handling mechanism for all the network layers.