Hi, folks.
I've spent a couple of days on reading about - and trying - algorithms,
that provide data transport from kernel to userland, and vice versa. I
wrote simple modules, using the 'standard' methods (device file &
driver, /proc file system, rtlinux fifo's), and I got a very sexy code
example from a friend, that relies on the mmap technique. The file is
called 'lincap.c', GPL2, with Copyright (c) 2002 Gianni Tedesco, and
provides a simple network sniffer. Its implementation is impressive: do
socket-setsockopt-mmap-bind, and yor are online with your networking
traffic.
Now, I have to write a conveying systems application, not a tcpdump,
so I searched for informations about the kernel-side techniques, that
typically support such a kind of data propagation, about the principles
behind that - and I became desparate upon this task.
I ask you, the community, to give me hints, code examples,
documentation, or pointers to all of that, pleeeeassse :-)
Thx in advance
Michael
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