Date: Tue, 19 Aug 2003 16:02:40 -0700 From: Jerry Toung <jtoung@arc.nasa.gov> To: freebsd-hackers@freebsd.org Subject: new routing protocol Message-ID: <200308191602.40166.jtoung@arc.nasa.gov>
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dear hackers, I am in the process of implementing a routing protocol under 5.0. This routing protocol is source route based and requires its own header after the ip header and before any other one such as udp,tcp. (ip)(new_rt_hdr)(udp)(paylaod) I am requesting your input as to the best way to approach this. I am thinking that the quick way would be to open netinet/ip_input.c and for every packet with ip->ip_p = NEW_RT_TYPE do my processing. I am not using routing tables, I have another mechanism for routing decisions. and for outgoing packets, before sending to the appropriate interface, in netinet/ip_output.c insert the new routing header then pass the packet to ifp->if_output. My problem is dealing with debuging and portability. With this raw approach I guess I will have to run builkernel and installkernel all the time. How can I avoid that? I thought about kernel modules, but I don't know what kind to use (SYSCALL_MODULE or DEV_MODULE,etc..) and how about netgraph.? does that make sense? somebody give a pointer and I'll figure out how to proceed. I am not that experienced in kernel programming. Thanks a lot, Jerry.
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