Hi friends, I am trying to prepare a documentation for the xfrm stack for the 2.6 version of kernels and the post it for other learners to make life easy for them. There is not proer documentation available in the net for it. So i did a code walk through the stack to understand it. I am successful to some extent. The guide would be like ip_queue_xmit() ---> ip_route_output_flow() ---> xfrm_lookup() ----> xfrm_bundle_create() ---> xfrm_tmpl_resolve() . To get to know about the flow through. But the code leads to 100 other places which inturn to 1000s more. So can anyone guide me through this process or post any document/link that makes life more easier for me? I badly need this. - : send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html