CAN stands for Controller Area Network, a broadcast network used
in automation and automotive fields. For example, the NMEA2000 standard
developped for marine devices uses a CAN network as the link layer.
This is an implementation of the linux socketcan API:
https://www.kernel.org/doc/Documentation/networking/can.txt
you can also see can(4).
This adds a new socket family (AF_CAN) and protocol (PF_CAN),
as well as the canconfig(8) utility, used to set timing parameter of
CAN hardware. Also inclued is a driver for the CAN controller
found in the allwinner A20 SoC (I tested it with an Olimex lime2 board,
connected with PIC18-based CAN devices).
There is also the canloop(4) pseudo-device, which allows to use
the socketcan API without CAN hardware.
At this time the CANFD part of the linux socketcan API is not implemented.
Error frames are not implemented either. But I could get the cansend and
canreceive utilities from the canutils package to build and run with minimal
changes. tcpudmp(8) can also be used to record frames, which can be
decoded with etherreal.
Originally, MKCRYPTO was introduced because the United States
classified cryptography as a munition and restricted its export. The
export controls were substantially relaxed fifteen years ago, and are
essentially irrelevant for software with published source code.
In the intervening time, nobody bothered to remove the option after
its motivation -- the US export restriction -- was eliminated. I'm
not aware of any other operating system that has a similar option; I
expect it is mainly out of apathy for churn that we still have it.
Today, cryptography is an essential part of modern computing -- you
can't use the internet responsibly without cryptography.
The position of the TNF board of directors is that TNF makes no
representation that MKCRYPTO=no satisfies any country's cryptography
regulations.
My personal position is that the availability of cryptography is a
basic human right; that any local laws restricting it to a privileged
few are fundamentally immoral; and that it is wrong for developers to
spend effort crippling cryptography to work around such laws.
As proposed on tech-crypto, tech-security, and tech-userlevel to no
objections:
https://mail-index.netbsd.org/tech-crypto/2017/05/06/msg000719.htmlhttps://mail-index.netbsd.org/tech-security/2017/05/06/msg000928.htmlhttps://mail-index.netbsd.org/tech-userlevel/2017/05/06/msg010547.html
P.S. Reviewing all the uses of MKCRYPTO in src revealed a lot of
*bad* crypto that was conditional on it, e.g. DES in telnet... That
should probably be removed too, but on the grounds that it is bad,
not on the grounds that it is (nominally) crypto.
side of the array being partitioned to save on stack space. Greater
savings can be gained by choosing recursion for the smaller side
of the partition and eliminating recursion for the larger side.
This also results in a small but measurable performance gain.
(From OpenBSD)
assume it is and load it.
Once loaded then check it's really for us.
This allows us to work out if the indexed alias entry is correct we
this was not checked previously.
This paves the way to resolve rump build process using buildrump.sh, where the definition of
HAVE_REGISTER_T caused conflicting definitions of register_t.
to change the boolean hit from false to true, but to change it from 1 to 2
which in a sense should have been obvious from the context:
if (hit)
/* more tests */
++hit;
The real problem was that hit was (in the imported tzcode) incorrectly
changed from int to bool in a previous update.
Not that it matters, this code is never actually executed - it was there
to deal with the mythical double leapseconds, which simply never exist
(hit counted the number of leapseconds in an adjustment) and it will all
be gone in the next tzcode update.
For now, just turn hit back into an int, which should satisfy gcc 8,
I hope.
This as discussed on current-users in the thread
entitled:
Proposal: new libc/libutil functions to map SIGXXXX <-> "XXXX"
that can be found (starting at):
http://mail-index.netbsd.org/current-users/2017/04/28/msg031600.html
These functions provide the mechanism to enable applications
to divorce themselves from internal details of the signal
implementation.
Libc minor bumped, prototypes in <signal.h>, sets lists updated (and sorted).
One and all: feel free to improve the sources & man page (etc), but
please do not change the function signatures without discussion.
This isn't a functional difference because huge + x > one is
always true for a small x, and is probably a magical incantation
to raise inexact if x != 0
Found by GCC 8.0
joerg