Hi, I am building a simple conntrack module for SCTP protocol. It is specified in a draft that still under review: https://www.ietf.org/archive/id/draft-porfiri-tsvwg-sctp-natsupp-03.txt The idea with the draft is to only look at SCTP INIT chunks and use timers to handle the rest of the state handling. I would like to minimize the number of changes I make inside the existing conntrack, since this is just a research project as of now. The question is if it is possible to have an external conntrack module that handles SCTP instead of the built-in SCTP l4 tracker? I have tried the following ideas, but am not happy with any of them 1. Register a kprobe for nf_conntrack_sctp_packet() and do my tracking there, but getting the original function arguments is messy and the original nf_conntrack_sctp_packet is still called 2. Change NF_CT_PROTO_SCTP to tristate and load my module at start up instead of the original SCTP l4 tracker, and use a function pointer for nf_conntrack_sctp_packet() 3. Modify existing SCTP l4 tracker directly I would be happy to try any other suggestion someone here might have. BR, /Sriram
