IPv6 on an sppp interface. In an IPv6-enabled kernel, every IPv6
interface automatically gets an IPv6 address assigned (and IPv6
multicast packets sent at initialization time). For sppp links where
we know our remote peer wouldn't support IPv6 at all, there's no point
in attempting to negotiate IPV6CP (or to even dial out for an IPv6
packet at all for dial-on-demand interfaces).
I wish there were a more generic way to administratively disable IPv6
on an interface instead. ume told me there isn't.
While i was at it, converted both, enable_vj and enable_ipv6 into flag
bits in struct sppp (enable_vj used to be an int of its own).
MFC after: 1 month
it again when going from INITIAL to STARTING. This has been done for
passive or auto-conecting interfaces always, but not for permanent
ones.
Obtained from: NetBSD (rev 1.32)
& and && has been botched. This was likely the cause for some havoc
with various negotiation cases of sppp in the past.
Obtained from: NetBSD (rev 1.13)
MFC after: 1 week
makes the implied assumption there were another 128 bytes of space in
front of the packet handed off to it... which is not the case for
sppp. This could easily end up in corrupting random memory.
This fix is about the same as revs 1.6, 1.8, and 1.9 from our
i4b_ispppsubr.c.
Also fixed IPCP option negotiation to zero out the options when
starting IPCP. Otherwise, if negotiation parameters change between
various IPCP startups, it could happen that old options would still be
requested (this happened if VJ was turned off, and ended up in half
off the link still negotiating for VJ compression).
IMHO, the base system's sppp is now feature-wise up to date with the
one in the i4b part of the tree, so the latter can be disabled.
MFC after: 1 month
inclusion of VJ compression into sppp.
Now, instead of the need to include this and that and everything plus
the kitchensink in each of those drivers, struct sppp uses struct
slcompress as an opaque structure only referenced by a pointer. The
actual structure is then malloced at initialization time.
While i was at it, also fixed a bug where received VJ packets would only
be recognized if INET6 was defined.
time from the PPP packets sent. This effectively merges rev 1.2 of
the old i4b_ispppsubr.c, with the exception that i eventually ended up
in debugging and fixing it so the idle time is now really
detected. ;-) (The version in i4b simply doesn't work right since it
still accounts for incoming LCP echo packets which it is supposed to
ignore for idle time considerations...)
Obtained from: i4b
MFC after: 1 month
sppp_parms that are needed for the SPPPIO[GS]DEFS ioctl commands.
This allows it to keep struct sppp inside #ifdef _KERNEL (where it
belongs), and prevents userland programs that wish to include
<net/if_sppp.h> from including the earth, the hell, and the universe
before the are able to resolve all the kernel-internal stuff that's in
struct sppp.
Discussed with: hm
MFC after: 1 month
This (effectively) merges rev 1.36 of i4b's old if_spppsubr.c, albeit
in a slightly different manner (we export the timer in millisecond
values as exposed to tick values from/to userland).
Obtained from: i4b
MFC after: 1 month
This is the logical merge of rev 1.32 of i4b's old if_spppsubr.c (which
was based on PR misc/11767), plus (i4b) rev 1.6 of i4b's if_ispppsubr.c,
albeit with numerous stylistic and cosmetic changes.
PR: misc/11767
Submitted by: i4b, Joachim Kuebart
MFC after: 1 month
Character-Map. RFC 1662 demands it for the sake of async to sync
PPP protocol converters (like Win9* :).
This merges rev 1.26/1.27 of the old i4b sppp changes.
route to the destination twice. Now that brian has fixed route.c to no
longer accept this second route, this long-standing nuisance became a
showstopper bug for sppp users.
In retrospect, this is the same fix as the one in rev 1.78 of if_sl.c;
most likely the original version of sppp has been cloned from SLIP. ;-)
if we've been given an RTA_IFP or changed RTA_IFA sockaddr.
This fixes the following bug:
>/dev/tun100
>/dev/tun101
ifconfig tun100 1.2.3.4 5.6.7.8
ifconfig tun101 1.2.3.4 6.7.8.9
route change 6.7.8.9 -ifa 1.2.3.4 -iface -mtu 500
which erroneously changed tun101's host route to have an ifp of tun100
(rt_getifa() sets the ifp after calling ifa_ifwithnet(1.2.3.4))
This incarnation submitted by: ru
select/poll, and therefore with pthreads. I doubt there is any way
to make this 100% semantically identical to the way it behaves in
unthreaded programs with blocking reads, but the solution here
should do the right thing for all reasonable usage patterns.
The basic idea is to schedule a callout for the read timeout when a
select/poll is done. When the callout fires, it ends the select if
it is still in progress, or marks the state as "timed out" if the
select has already ended for some other reason. Additional logic in
bpfread then does the right thing in the case where the timeout has
fired.
Note, I co-opted the bd_state member of the bpf_d structure. It has
been present in the structure since the initial import of 4.4-lite,
but as far as I can tell it has never been used.
PR: kern/22063 and bin/31649
MFC after: 3 days
Non-SMP, i386-only, no polling in the idle loop at the moment.
To use this code you must compile a kernel with
options DEVICE_POLLING
and at runtime enable polling with
sysctl kern.polling.enable=1
The percentage of CPU reserved to userland can be set with
sysctl kern.polling.user_frac=NN (default is 50)
while the remainder is used by polling device drivers and netisr's.
These are the only two variables that you should need to touch. There
are a few more parameters in kern.polling but the default values
are adequate for all purposes. See the code in kern_poll.c for
more details on them.
Polling in the idle loop will be implemented shortly by introducing
a kernel thread which does the job. Until then, the amount of CPU
dedicated to polling will never exceed (100-user_frac).
The equivalent (actually, better) code for -stable is at
http://info.iet.unipi.it/~luigi/polling/
and also supports polling in the idle loop.
NOTE to Alpha developers:
There is really nothing in this code that is i386-specific.
If you move the 2 lines supporting the new option from
sys/conf/{files,options}.i386 to sys/conf/{files,options} I am
pretty sure that this should work on the Alpha as well, just that
I do not have a suitable test box to try it. If someone feels like
trying it, I would appreciate it.
NOTE to other developers:
sure some things could be done better, and as always I am open to
constructive criticism, which a few of you have already given and
I greatly appreciated.
However, before proposing radical architectural changes, please
take some time to possibly try out this code, or at the very least
read the comments in kern_poll.c, especially re. the reason why I
am using a soft netisr and cannot (I believe) replace it with a
simple timeout.
Quick description of files touched by this commit:
sys/conf/files.i386
new file kern/kern_poll.c
sys/conf/options.i386
new option
sys/i386/i386/trap.c
poll in trap (disabled by default)
sys/kern/kern_clock.c
initialization and hardclock hooks.
sys/kern/kern_intr.c
minor swi_net changes
sys/kern/kern_poll.c
the bulk of the code.
sys/net/if.h
new flag
sys/net/if_var.h
declaration for functions used in device drivers.
sys/net/netisr.h
NETISR_POLL
sys/dev/fxp/if_fxp.c
sys/dev/fxp/if_fxpvar.h
sys/pci/if_dc.c
sys/pci/if_dcreg.h
sys/pci/if_sis.c
sys/pci/if_sisreg.h
device driver modifications
vnodes. This will hopefully serve as a base from which we can
expand the MP code. We currently do not attempt to obtain any
mutex or SX locks, but the door is open to add them when we nail
down exactly how that part of it is going to work.
"[...] and removes the hostcache code from standard kernels---the
code that depends on it is not going to happen any time soon,
I'm afraid."
Time to clean up.
