Hello all, I'm writing a kernel module which intercepts incoming IP packets and reads information from a custom header. The information contained in "My header" is passed to userspace via netlink. So userspace builds up a picture of the current network state, neighbouring nodes etc..... I've inserted this custom header at the hook NF_IP_LOCAL_OUT in each outgoing IP packet.At the moment I'm just populating it with temporary data. So my outgoing packets look like [Mac hdr][IP hdr][My header][Data] I'm wondering whats the best way for the kernel to communicate with userspace at the NF_IP_LOCAL_OUT hook so it can populate [My header] with the latest information from userspace??? So i'm looking to do something like 1. Kernel at NF_IP_LOCAL_OUT, I've got a new packet! 2. Kernel -> Userspace what information should I put in [My Header]? 3. Userspace -> Kernel Heres my current view of the network 4. Kernel Populates My header and returns NF_ACCEPT Anyways I would be happy to hear any ideas your have, :-) Thanks, Kevin -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
