Hi, On Wed, Dec 14, 2022 at 10:50:19PM +0200, Lev Stipakov wrote: > On Windows control packets are handled by userspace via link > read/write routines (which use device handle from CreateFile). Both > FreeBSD and Linux implementations use additional, netlink-based (or > FreeBSD analogue) channel to send/receive control packets, > so existing link read/write routines are not called (except initial > handshake, before socket handover to kernel) and therefore stats for > control packets are not duplicated.
FreeBSD uses standard socket read/write calls for control packets.
The "tunnel control packets through the ioctl() interface" method was
never used by the kernel and will be removed from OpenVPN in kp's 4/4
patch (to be merged soon).
But since the FreeBSD kernel does not count control packets (I've
been told that it "sniffs" the socket and only removes "interesting"
packets, the rest is passed through to userland - so control packets are
not handled by kernel), there is no duplication.
No idea about the Linux details... Antonio?
gert
--
"If was one thing all people took for granted, was conviction that if you
feed honest figures into a computer, honest figures come out. Never doubted
it myself till I met a computer with a sense of humor."
Robert A. Heinlein, The Moon is a Harsh Mistress
Gert Doering - Munich, Germany g...@greenie.muc.de
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