Hi, I have need of kernel support for L2TP tunnelling. It doesn't appear to exist yet (though if somebody knows of an implementation let me know). I was just wondering if anybody had hints as how to go about making it work. The basic idea is that one socket can support multiple tunnels and each tunnel can have multiple calls. Each call will be terminated to a PPP session. The control messaging can be handled by userspace, my problem is how to get the kernel support to sit on the UDP socket eating only the data packets and leaving the control packets alone. AFAIK there is no way for a process to sit between a socket and a user space process. My only other thought it for a kernel thread to own the socket and retransmit to control packets through another socket. Does this sound like a good idea? The other idea was to create a new FD for each call which you pass to pppd to do it's job with. Sound sensible to me, at least as long as the PPP daemon can only handle one session per process. Are there any other tunneling protocols that implement anything similar? Thanks in advance. -- Martijn van Oosterhout <kleptog@svana.org> http://svana.org/kleptog/ > "All that is needed for the forces of evil to triumph is for enough good > men to do nothing." - Edmond Burke > "The penalty good people pay for not being interested in politics is to be > governed by people worse than themselves." - Plato
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