Andi Kleen wrote:
> The sniffer zero copy implementation as implemented in some libpcaps
> does not depend on any special NIC support; it should work with any.
Do you mean mmap() on a packet socket? Unless I am mistaken, the data
is still copied once to the mmap area, however only the capture length
is copied -- the rest of the packet is discarded.
This means that you cannot use mmap() on a packet socket to zero-copy
read whole packets. In fact there is no way to zero-copy read whole
packets into user space, without modifying the kernel.
Am I mistaken (it would be nice)?
Thanks,
-- Jamie
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This archive was generated by hypermail 2b29 : Wed Aug 15 2001 - 21:00:36 EST