sl(4): Convert to ttylock/ttyunlock.

Garbage-collect the remaining vestiges of netisr.

Ensure that all queues passed to ifq_enqueue2() have a valid ifq_lock.

Use IFQ_SET_MAXLEN() rather than open-coding it.

Adopt <net/if_stats.h>.

branches: 1.131.6;
Add comments about D_MPSAFE to functions called as struct linesw.l_ioctl.

Replace: M_MOVE_PKTHDR -> m_move_pkthdr. No functional change, since the
former is a macro to the latter.

branches: 1.129.2;
SIOCSIFDSTADDR uses struct ifreq instead of struct ifaddr or struct in_aliasreq.

SIOCSIFDSTADDR is not used by base package commands...

I checked sys/net*/* only.

branches: 1.128.10;
if MGETHDR fails, don't try to copy to single mbuf and deref null.

reduce ifdefs.

branches: 1.127.2;
MFREE -> m_free

modularize some more drivers and merge the module glue

make strip and slip modular, and cosmetic for ppp.

branches: 1.124.2;
Introduce m_set_rcvif and m_reset_rcvif

The API is used to set (or reset) a received interface of a mbuf.
They are counterpart of m_get_rcvif, which will come in another
commit, hide internal of rcvif operation, and reduce the diff of
the upcoming change.

No functional change.

Constify rtentry of if_output

We no longer need to change rtentry below if_output.

The change makes it clear where rtentries are changed (or not)
and helps forthcoming locking (os psrefing) rtentries.

IFQ_ENQUEUE refactor (3/3) : eliminate pktattr argument from IFQ_ENQUEUE caller

sprinkle _KERNEL_OPT

Honor pseudo attach decl generated by config(1).

branches: 1.119.4;
- Implement pktqueue interface for lockless IP input queue.
- Replace ipintrq and ip6intrq with the pktqueue mechanism.
- Eliminate kernel-lock from ipintr() and ip6intr().
- Some preparation work to push softnet_lock out of ipintr().

Discussed on tech-net.

branches: 1.118.12; 1.118.26;
Change obsolete CBSIZE constant (48), to a power of two constant (64) that
is close enough to match the original assumptions.

Push the bpf_ops usage back into bpf.h. Push the common ifp->if_bpf
check into the inline functions as well the fourth argument for
bpf_attach.

branches: 1.116.2; 1.116.4;
Redefine bpf linkage through an always present op vector, i.e.
#if NBPFILTER is no longer required in the client. This change
doesn't yet add support for loading bpf as a module, since drivers
can register before bpf is attached. However, callers of bpf can
now be modularized.

Dynamically loadable bpf could probably be done fairly easily with
coordination from the stub driver and the real driver by registering
attachments in the stub before the real driver is loaded and doing
a handoff. ... and I'm not going to ponder the depths of unload
here.

Tested with i386/MONOLITHIC, modified MONOLITHIC without bpf and rump.

Introduce actions/requests to handle authorization for ppp(4), sl(4),
strip(4), btuart(4) and bcsp(4) network interfaces and devices.

Mailing list reference:

http://mail-index.netbsd.org/tech-kern/2009/04/27/msg004955.html

branches: 1.114.2;
kill MALLOC and FREE macros.

*** Summary ***

When a link-layer address changes (e.g., ifconfig ex0 link
02:de:ad:be:ef:02 active), send a gratuitous ARP and/or a Neighbor
Advertisement to update the network-/link-layer address bindings
on our LAN peers.

Refuse a change of ethernet address to the address 00:00:00:00:00:00
or to any multicast/broadcast address. (Thanks matt@.)

Reorder ifnet ioctl operations so that driver ioctls may inherit
the functions of their "class"---ether_ioctl(), fddi_ioctl(), et
cetera---and the class ioctls may inherit from the generic ioctl,
ifioctl_common(), but both driver- and class-ioctls may override
the generic behavior. Make network drivers share more code.

Distinguish a "factory" link-layer address from others for the
purposes of both protecting that address from deletion and computing
EUI64.

Return consistent, appropriate error codes from network drivers.

Improve readability. KNF.

*** Details ***

In if_attach(), always initialize the interface ioctl routine,
ifnet->if_ioctl, if the driver has not already initialized it.
Delete if_ioctl == NULL tests everywhere else, because it cannot
happen.

In the ioctl routines of network interfaces, inherit common ioctl
behaviors by calling either ifioctl_common() or whichever ioctl
routine is appropriate for the class of interface---e.g., ether_ioctl()
for ethernets.

Stop (ab)using SIOCSIFADDR and start to use SIOCINITIFADDR. In
the user->kernel interface, SIOCSIFADDR's argument was an ifreq,
but on the protocol->ifnet interface, SIOCSIFADDR's argument was
an ifaddr. That was confusing, and it would work against me as I
make it possible for a network interface to overload most ioctls.
On the protocol->ifnet interface, replace SIOCSIFADDR with
SIOCINITIFADDR. In ifioctl(), return EPERM if userland tries to
invoke SIOCINITIFADDR.

In ifioctl(), give the interface the first shot at handling most
interface ioctls, and give the protocol the second shot, instead
of the other way around. Finally, let compatibility code (COMPAT_OSOCK)
take a shot.

Pull device initialization out of switch statements under
SIOCINITIFADDR. For example, pull ..._init() out of any switch
statement that looks like this:

switch (...->sa_family) {
case ...:
..._init();
...
break;
...
default:
..._init();
...
break;
}

Rewrite many if-else clauses that handle all permutations of IFF_UP
and IFF_RUNNING to use a switch statement,

switch (x & (IFF_UP|IFF_RUNNING)) {
case 0:
...
break;
case IFF_RUNNING:
...
break;
case IFF_UP:
...
break;
case IFF_UP|IFF_RUNNING:
...
break;
}

unifdef lots of code containing #ifdef FreeBSD, #ifdef NetBSD, and
#ifdef SIOCSIFMTU, especially in fwip(4) and in ndis(4).

In ipw(4), remove an if_set_sadl() call that is out of place.

In nfe(4), reuse the jumbo MTU logic in ether_ioctl().

Let ethernets register a callback for setting h/w state such as
promiscuous mode and the multicast filter in accord with a change
in the if_flags: ether_set_ifflags_cb() registers a callback that
returns ENETRESET if the caller should reset the ethernet by calling
if_init(), 0 on success, != 0 on failure. Pull common code from
ex(4), gem(4), nfe(4), sip(4), tlp(4), vge(4) into ether_ioctl(),
and register if_flags callbacks for those drivers.

Return ENOTTY instead of EINVAL for inappropriate ioctls. In
zyd(4), use ENXIO instead of ENOTTY to indicate that the device is
not any longer attached.

Add to if_set_sadl() a boolean 'factory' argument that indicates
whether a link-layer address was assigned by the factory or some
other source. In a comment, recommend using the factory address
for generating an EUI64, and update in6_get_hw_ifid() to prefer a
factory address to any other link-layer address.

Add a routing message, RTM_LLINFO_UPD, that tells protocols to
update the binding of network-layer addresses to link-layer addresses.
Implement this message in IPv4 and IPv6 by sending a gratuitous
ARP or a neighbor advertisement, respectively. Generate RTM_LLINFO_UPD
messages on a change of an interface's link-layer address.

In ether_ioctl(), do not let SIOCALIFADDR set a link-layer address
that is broadcast/multicast or equal to 00:00:00:00:00:00.

Make ether_ioctl() call ifioctl_common() to handle ioctls that it
does not understand.

In gif(4), initialize if_softc and use it, instead of assuming that
the gif_softc and ifp overlap.

Let ifioctl_common() handle SIOCGIFADDR.

Sprinkle rtcache_invariants(), which checks on DIAGNOSTIC kernels
that certain invariants on a struct route are satisfied.

In agr(4), rewrite agr_ioctl_filter() to be a bit more explicit
about the ioctls that we do not allow on an agr(4) member interface.

bzero -> memset. Delete unnecessary casts to void *. Use
sockaddr_in_init() and sockaddr_in6_init(). Compare pointers with
NULL instead of "testing truth". Replace some instances of (type
*)0 with NULL. Change some K&R prototypes to ANSI C, and join
lines.

branches: 1.112.2; 1.112.4;
- add if_alloc (ours just mallocs), and if_initname and use them (from FreeBSD)
- kill memsets where M_ZERO can be used.

branches: 1.111.2; 1.111.4; 1.111.6;
Merge the socket locking patch:

- Socket layer becomes MP safe.
- Unix protocols become MP safe.
- Allows protocol processing interrupts to safely block on locks.
- Fixes a number of race conditions.

With much feedback from matt@ and plunky@.

branches: 1.110.6; 1.110.8;
Start patching up the kernel so that a network driver always has
the opportunity to handle an ioctl before generic ifioctl handling
occurs. This will ease extending the kernel and sharing of code
between drivers.

First steps: Make the signature of ifioctl_common() match struct
ifinet->if_ioctl. Convert SIOCSIFCAP and SIOCSIFMTU to the new
ifioctl() regime, throughout the kernel.

Call ttyflush() with tty_lock held.

branches: 1.108.2; 1.108.4;
Use the softint API.

branches: 1.107.2;
Use ifreq_setaddr(), ifreq_getaddr(), sockaddr_in_init(), and
sockaddr_copy(). Constify. Compare pointers with NULL, not 0.
Don't "test truth" of pointers, but compare with NULL.

branches: 1.106.2; 1.106.6; 1.106.8;
Generic soft interrupts are mandatory.

branches: 1.105.2;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

KNF: de-__P, bzero -> memset, bcmp -> memcmp. Remove extraneous
parentheses in return statements.

Cosmetic: don't open-code TAILQ_FOREACH().

Cosmetic: change types of variables to avoid oodles of casts: in
in6_src.c, avoid casts by changing several route_in6 pointers
to struct route pointers. Remove unnecessary casts to caddr_t
elsewhere.

Pave the way for eliminating address family-specific route caches:
soon, struct route will not embed a sockaddr, but it will hold
a reference to an external sockaddr, instead. We will set the
destination sockaddr using rtcache_setdst(). (I created a stub
for it, but it isn't used anywhere, yet.) rtcache_free() will
free the sockaddr. I have extracted from rtcache_free() a helper
subroutine, rtcache_clear(). rtcache_clear() will "forget" a
cached route, but it will not forget the destination by releasing
the sockaddr. I use rtcache_clear() instead of rtcache_free()
in rtcache_update(), because rtcache_update() is not supposed
to forget the destination.

Constify:

1 Introduce const accessor for route->ro_dst, rtcache_getdst().

2 Constify the 'dst' argument to ifnet->if_output(). This
led me to constify a lot of code called by output routines.

3 Constify the sockaddr argument to protosw->pr_ctlinput. This
led me to constify a lot of code called by ctlinput routines.

4 Introduce const macros for converting from a generic sockaddr
to family-specific sockaddrs, e.g., sockaddr_in: satocsin6,
satocsin, et cetera.

branches: 1.103.2;
Consistent usage of KAUTH_GENERIC_ISSUSER.

__unused removal on arguments; approved by core.

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

branches: 1.100.4; 1.100.6;
Use the LWP cached credentials where sane.

KNF.

branches: 1.98.2;
merge FreeBSD timecounters from branch simonb-timecounters
- struct timeval time is gone
time.tv_sec -> time_second
- struct timeval mono_time is gone
mono_time.tv_sec -> time_uptime
- access to time via
{get,}{micro,nano,bin}time()
get* versions are fast but less precise
- support NTP nanokernel implementation (NTP API 4)
- further reading:
Timecounter Paper: http://phk.freebsd.dk/pubs/timecounter.pdf
NTP Nanokernel: http://www.eecis.udel.edu/~mills/ntp/html/kern.html

branches: 1.97.2;
integrate kauth.

branches: 1.96.2; 1.96.4; 1.96.6;
Provide ppp like statistics instead of grovelling through the kernel
symbols.

branches: 1.95.4; 1.95.6;
ANSI function decls and application of static.

merge ktrace-lwp.

Overhaul how TTY line disciplines are handled:
- Replace references to linesw[0] with a ttyldisc_default() function
that returns the default ("termios") line discipline.
- The linesw[] array is gone, replaced by a linked list.
- ttyldisc_add() and ttyldisc_remove() have been replaced by
ttyldisc_attach() and ttyldisc_detach().
- Things that provide line disciplines are now responsible for
registering those disciplines with the system. The linesw
structures are no longer declared in tty_conf.c
- Line disciplines are now refcounted; a lookup causes a reference to
be held. ttyldisc_release() releases the reference. Attempts to
detach an in-use line discipline result in EBUSY.
- Fix function signature lossage in if_sl.c, if_strip.c, and tty_tb.c
that was masked by the old tty_conf.c
- tty_init() is no longer necessary; delete it and its call from main().

branches: 1.92.6;
- introduce M_MOVE_PKTHDR and use it where appropriate.
intended to be mostly API compatible with openbsd/freebsd.
- remove a glue #define in netipsec/ipsec_osdep.h.

branches: 1.91.2;
factor out the interface queueing code into two functions. One used by
the non point-to-point interfaces that has one queue, and one used by
the point to point interfaces that has two queues. No functional changes.
XXX: The ALTQ stuff makes the code ugly.
XXX: More cleanup to come

branches: 1.90.4;
Sprinkle #ifdef INET to make a GENERIC kernel compile with INET undefined.

Don't forget to call bpfdetach in the clone destroy function.
While here, add a missing static and change some spaces to tabs.

Fix what must have been an omission: missing brace and a leftover
use of `i', which is no longer defined. Fixes build problem for ports
not defining __HAVE_GENERIC_SOFT_INTERRUPTS.

clonify strip and sl.

Factor out the hand-crafting of mbufs from the interface files. Reviewed by
gimpy. XXX: I could have used bpf_mtap2 on some of the new functions, but I
chose not to, because I just wanted to do what amounts to a code move.

kill sprintf, use snprintf

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.83.2;
bpf_mtap() does not care about M_PKTHDR at the top. M_COPY_PKTHDR has some
consequences, so avoid it. if we need to attach dummy headers, we should
use M_PREPEND instead.

Add MBUFTRACE kernel option.
Do a little mbuf rework while here. Change all uses of MGET*(*, M_WAIT, *)
to m_get*(M_WAIT, *). These are not performance critical and making them
call m_get saves considerable space. Add m_clget analogue of MCLGET and
make corresponding change for M_WAIT uses.
Modify netinet, gem, fxp, tulip, nfs to support MBUFTRACE.
Begin to change netstat to use sysctl.

KNF - return is not a function.

Convert ioctl code to use EPASSTHROUGH instead of -1 or ENOTTY for
indicating an unhandled "command". ERESTART is -1, which can lead to
confusion. ERESTART has been moved to -3 and EPASSTHROUGH has been
placed at -4. No ioctl code should now return -1 anywhere. The
ioctl() system call is now properly restartable.

Include <machine/intr.h> unconditionally, instead of only doing so if
__HAVE_GENERIC_SOFT_INTERRUPTS and relying on <sys/param.h> to provide it
otherwise; pointed out by Aymeric Vincent.

add RCSIDs

branches: 1.77.2;
Fix slight glitch from rev. 1.70: bp is not adjusted for next loop after
outputting some data.
Fix provided by isaki@par.odn.ne.jp in PR kern/13472.

branches: 1.76.2;
change the meaning of ifnet.if_lastchange to meet RFC1573 ifLastChange.
follows BSD/OS practice and ucd-snmp code (FreeBSD does it for specific
interfaces only).

was: if_lastchange get updated on every packet transmission/receipt.
now: if_lastchange get updated when IFF_UP is changed.

fix mbuf leak due to meaningless MGETHDR. from niels provos

Remove the use of splimp() from the NetBSD kernel. splnet()
and only splnet() is allowed for the protection of data structures
used by network devices.

Remove unnecessary test of tp->t_linesw against NULL; they are results
of confusion while correcting compilation error after t_line is
replaced with t_linesw.

branches: 1.72.2;
Fix a rather annoying problem where the sockaddr_dl which holds
the link level name for the interface (ifp->if_sadl) is allocated
before ifp->if_addrlen is initialized, which could lead to allocating
too little space for the link level address.

Do this by splitting allocation of the link level name out of
if_attach() and into if_alloc_sadl(), which is normally called
by functions like ether_ifattach(). Network interfaces which
don't have a link-specific attach routine must call if_alloc_sadl()
themselves (example: gif).

Link level names are freed by if_free_sadl(), which can be called
from e.g. ether_ifdetach(). Drivers never need call if_free_sadl()
themselves as if_detach() will do it if it is not already done.

While here, add the ability to pass an AF_LINK address to
SIOCSIFADDR in ether_ioctl() (this is what caused me to notice
the problem that the above fixes).

For SLIP/STRIP/PPP, use generic soft interrupts, if available.

After freeing the input buffer, set the pointer to it to NULL.

Don't use splimp() to block both net and tty interrupts. Instead,
block both interrupt levels as appropriate.

Plug a memory leak.

Defer output processing to the software interrupt.

Move the VJ uncompress code into the software interrupt.

Once we have a complete frame, schedule a SLIP software interrupt,
and manipulate ipintrq from there. This will allow us to clean up
the use of splimp() in this file later.

Make the buffer management in SLIP just a little less evil.

ALTQ'ify.

Fill in if_dlt.

Adapt to bpfattach() changes, and further centralize the bpfattach()
and bpfdetach() calls into link-type subroutines where possible.

Set the default line discipline to t_linesw, rather than just NULL it.

Adapt to the new line discipline scheme.

NetBSD -> __NetBSD__ in an #ifdef, and nuke sc_bpf; there's one in
the ifnet already.

Kill some more register declarations.

Don't need to include <sys/conf.h> here.

branches: 1.55.8;
fixes to compile if NBPFILTER == 0

Make it possible to set MTU via "ifconfig" at run time. "SLMTU" is now
used to set the initial value.

branches: 1.53.4;
Use #error instead of causing parse errors; noticed by Heiko.

use __NetBSD__ not NetBSD

use #ifdef INET so this compiles again

defopt INET, NETATALK.

Add missing comma.

add the ability to run SLIP with CLOCAL set, per PR#3586

Merge with Lite2 + local changes

Update to ppp-2.3b5

Update for the new mbuf code, in a slighly kludgy way. Basically, these
drivers played a somewhat evil trick with clusters, which is now
replaced by a somewhat evil trick with regular malloc'd memory.

backout previous kprintf change

- printf -> kprintf, sprintf -> ksprintf

use sc_unit instead of pointer arthimetic.

print difference between pointers with %ld, so that -Wformat works
on the Alpha and for consistency. Also, other minor formatting cleanups.

Move a mis-placed line on slattach() so that SLIOCGUNIT works properly.
From Jonathan O'Brien <obrien@phoenix.sfsu.edu>.

branches: 1.39.4;
Changed struct ifnet to have a pointer to the softc of the underlying
device and a printable "external name" (name + unit number), thus eliminating
if_name and if_unit. Updated interface to (*if_watchdog)() and (*if_reset)()
to take a struct ifnet *, rather than a unit number.

Net prototypes

splnet --> splsoftnet

There's no reason to set if_next here.

Update to use timer{add,sub}().

fixed sized types, where appropriate. when casting pointers to
integers to do math on them, cast to long. ioctl commands are
u_longs.

timevalsub --> __timersub

be more careful with types, also pull in headers where necessary.

use NetBSD (defined in param.h) not __NetBSD__ to allow x-compilation
with native compiler.

kill bogus external declaration of time

branches: 1.29.2;
New RCS ID's, take two. they're more aesthecially pleasant, and use 'NetBSD'

Update to 4.4-Lite networking code, with a few local changes.

Some stability/safety/extensibility patches. Inspired by Christoph Badura.
Always make sure our buffer is large enough, and restart hung lines.

mccanne convinced me that slip.h *should* exist. this is what
i "implemented" for 4.4, and the adjustments to the other files to
match.

Remove an #ifdef we no longer need.

Multicast is no longer optional

quench the grammar flames!

serious cleanup

include machine/cpu.h, for machines which define soft interrupt stuff
there. marked XXX; they prolly shouldn't do that...

Canonicalize all #includes.

move slip compression configuration into the interface flags,
and diddle a couple of related things.

multicast support.
From Chris Maeda, cmaeda@cs.washington.edu
These patches are derived from the IP Multicast patches for BSDI.

T_LINEP member of struct tty becomes t_sc. This replaces the
#define t_sc T_LINEP
that appear in tty_tb.c, if_sl.c, and if_ppp.h

removed slip and ppp specific prototypes from tty.h where they didn't belong.
moved them to tty_conf.c within #if Nwhatever > 0 where they do belong.
made sure that if_sl.c, and if_ppp.c still compile quietly.

Call output routine redundantly to possible avoid some hangs due to missed
interrupts.

Ignore carrier if not using hardware carrier detect (i.e. CLOCAL is set).

Ignore TS_CARR_ON when CLOCAL is set.

branches: 1.12.2;
add an additional suser() check.
regular users should not be able to change slip interface characteristics!

Add RCS identifiers (this time on the correct side of the branch), and
incorporate recent changes in netbsd-0-9 branch.

Change tty code to use clist interface, but with ring buffer implementation.
Also, fix a couple of bugs in tty.c and pccons.c, and some gross kluginess
in the hp300 stuff.

ANSIfications - removed all implicit function return types and argument
definitions. Ensured that all files include "systm.h" to gain access to
general prototypes. Casts where necessary.

add include of select.h if necessary for protos, or delete if extraneous

make kernel select interface be one-stop shopping & clean it all up.

ring buffer now uses rbchar's (shorts) instead of chars.

bump slip MTU back down to 296...

one line got botched during bpf patch installation

added BPF support, as provided by David Greenman (davidg@implode.rain.com)

after 0.2.2 "stable" patches applied

branches: 1.1.1;
Initial revision

Garbage-collect the remaining vestiges of netisr.

Ensure that all queues passed to ifq_enqueue2() have a valid ifq_lock.

Use IFQ_SET_MAXLEN() rather than open-coding it.

Adopt <net/if_stats.h>.

branches: 1.131.6;
Add comments about D_MPSAFE to functions called as struct linesw.l_ioctl.

Replace: M_MOVE_PKTHDR -> m_move_pkthdr. No functional change, since the
former is a macro to the latter.

branches: 1.129.2;
SIOCSIFDSTADDR uses struct ifreq instead of struct ifaddr or struct in_aliasreq.

SIOCSIFDSTADDR is not used by base package commands...

I checked sys/net*/* only.

branches: 1.128.10;
if MGETHDR fails, don't try to copy to single mbuf and deref null.

reduce ifdefs.

branches: 1.127.2;
MFREE -> m_free

modularize some more drivers and merge the module glue

make strip and slip modular, and cosmetic for ppp.

branches: 1.124.2;
Introduce m_set_rcvif and m_reset_rcvif

The API is used to set (or reset) a received interface of a mbuf.
They are counterpart of m_get_rcvif, which will come in another
commit, hide internal of rcvif operation, and reduce the diff of
the upcoming change.

No functional change.

Constify rtentry of if_output

We no longer need to change rtentry below if_output.

The change makes it clear where rtentries are changed (or not)
and helps forthcoming locking (os psrefing) rtentries.

IFQ_ENQUEUE refactor (3/3) : eliminate pktattr argument from IFQ_ENQUEUE caller

sprinkle _KERNEL_OPT

Honor pseudo attach decl generated by config(1).

branches: 1.119.4;
- Implement pktqueue interface for lockless IP input queue.
- Replace ipintrq and ip6intrq with the pktqueue mechanism.
- Eliminate kernel-lock from ipintr() and ip6intr().
- Some preparation work to push softnet_lock out of ipintr().

Discussed on tech-net.

branches: 1.118.12; 1.118.26;
Change obsolete CBSIZE constant (48), to a power of two constant (64) that
is close enough to match the original assumptions.

Push the bpf_ops usage back into bpf.h. Push the common ifp->if_bpf
check into the inline functions as well the fourth argument for
bpf_attach.

branches: 1.116.2; 1.116.4;
Redefine bpf linkage through an always present op vector, i.e.
#if NBPFILTER is no longer required in the client. This change
doesn't yet add support for loading bpf as a module, since drivers
can register before bpf is attached. However, callers of bpf can
now be modularized.

Dynamically loadable bpf could probably be done fairly easily with
coordination from the stub driver and the real driver by registering
attachments in the stub before the real driver is loaded and doing
a handoff. ... and I'm not going to ponder the depths of unload
here.

Tested with i386/MONOLITHIC, modified MONOLITHIC without bpf and rump.

Introduce actions/requests to handle authorization for ppp(4), sl(4),
strip(4), btuart(4) and bcsp(4) network interfaces and devices.

Mailing list reference:

http://mail-index.netbsd.org/tech-kern/2009/04/27/msg004955.html

branches: 1.114.2;
kill MALLOC and FREE macros.

*** Summary ***

When a link-layer address changes (e.g., ifconfig ex0 link
02:de:ad:be:ef:02 active), send a gratuitous ARP and/or a Neighbor
Advertisement to update the network-/link-layer address bindings
on our LAN peers.

Refuse a change of ethernet address to the address 00:00:00:00:00:00
or to any multicast/broadcast address. (Thanks matt@.)

Reorder ifnet ioctl operations so that driver ioctls may inherit
the functions of their "class"---ether_ioctl(), fddi_ioctl(), et
cetera---and the class ioctls may inherit from the generic ioctl,
ifioctl_common(), but both driver- and class-ioctls may override
the generic behavior. Make network drivers share more code.

Distinguish a "factory" link-layer address from others for the
purposes of both protecting that address from deletion and computing
EUI64.

Return consistent, appropriate error codes from network drivers.

Improve readability. KNF.

*** Details ***

In if_attach(), always initialize the interface ioctl routine,
ifnet->if_ioctl, if the driver has not already initialized it.
Delete if_ioctl == NULL tests everywhere else, because it cannot
happen.

In the ioctl routines of network interfaces, inherit common ioctl
behaviors by calling either ifioctl_common() or whichever ioctl
routine is appropriate for the class of interface---e.g., ether_ioctl()
for ethernets.

Stop (ab)using SIOCSIFADDR and start to use SIOCINITIFADDR. In
the user->kernel interface, SIOCSIFADDR's argument was an ifreq,
but on the protocol->ifnet interface, SIOCSIFADDR's argument was
an ifaddr. That was confusing, and it would work against me as I
make it possible for a network interface to overload most ioctls.
On the protocol->ifnet interface, replace SIOCSIFADDR with
SIOCINITIFADDR. In ifioctl(), return EPERM if userland tries to
invoke SIOCINITIFADDR.

In ifioctl(), give the interface the first shot at handling most
interface ioctls, and give the protocol the second shot, instead
of the other way around. Finally, let compatibility code (COMPAT_OSOCK)
take a shot.

Pull device initialization out of switch statements under
SIOCINITIFADDR. For example, pull ..._init() out of any switch
statement that looks like this:

switch (...->sa_family) {
case ...:
..._init();
...
break;
...
default:
..._init();
...
break;
}

Rewrite many if-else clauses that handle all permutations of IFF_UP
and IFF_RUNNING to use a switch statement,

switch (x & (IFF_UP|IFF_RUNNING)) {
case 0:
...
break;
case IFF_RUNNING:
...
break;
case IFF_UP:
...
break;
case IFF_UP|IFF_RUNNING:
...
break;
}

unifdef lots of code containing #ifdef FreeBSD, #ifdef NetBSD, and
#ifdef SIOCSIFMTU, especially in fwip(4) and in ndis(4).

In ipw(4), remove an if_set_sadl() call that is out of place.

In nfe(4), reuse the jumbo MTU logic in ether_ioctl().

Let ethernets register a callback for setting h/w state such as
promiscuous mode and the multicast filter in accord with a change
in the if_flags: ether_set_ifflags_cb() registers a callback that
returns ENETRESET if the caller should reset the ethernet by calling
if_init(), 0 on success, != 0 on failure. Pull common code from
ex(4), gem(4), nfe(4), sip(4), tlp(4), vge(4) into ether_ioctl(),
and register if_flags callbacks for those drivers.

Return ENOTTY instead of EINVAL for inappropriate ioctls. In
zyd(4), use ENXIO instead of ENOTTY to indicate that the device is
not any longer attached.

Add to if_set_sadl() a boolean 'factory' argument that indicates
whether a link-layer address was assigned by the factory or some
other source. In a comment, recommend using the factory address
for generating an EUI64, and update in6_get_hw_ifid() to prefer a
factory address to any other link-layer address.

Add a routing message, RTM_LLINFO_UPD, that tells protocols to
update the binding of network-layer addresses to link-layer addresses.
Implement this message in IPv4 and IPv6 by sending a gratuitous
ARP or a neighbor advertisement, respectively. Generate RTM_LLINFO_UPD
messages on a change of an interface's link-layer address.

In ether_ioctl(), do not let SIOCALIFADDR set a link-layer address
that is broadcast/multicast or equal to 00:00:00:00:00:00.

Make ether_ioctl() call ifioctl_common() to handle ioctls that it
does not understand.

In gif(4), initialize if_softc and use it, instead of assuming that
the gif_softc and ifp overlap.

Let ifioctl_common() handle SIOCGIFADDR.

Sprinkle rtcache_invariants(), which checks on DIAGNOSTIC kernels
that certain invariants on a struct route are satisfied.

In agr(4), rewrite agr_ioctl_filter() to be a bit more explicit
about the ioctls that we do not allow on an agr(4) member interface.

bzero -> memset. Delete unnecessary casts to void *. Use
sockaddr_in_init() and sockaddr_in6_init(). Compare pointers with
NULL instead of "testing truth". Replace some instances of (type
*)0 with NULL. Change some K&R prototypes to ANSI C, and join
lines.

branches: 1.112.2; 1.112.4;
- add if_alloc (ours just mallocs), and if_initname and use them (from FreeBSD)
- kill memsets where M_ZERO can be used.

branches: 1.111.2; 1.111.4; 1.111.6;
Merge the socket locking patch:

- Socket layer becomes MP safe.
- Unix protocols become MP safe.
- Allows protocol processing interrupts to safely block on locks.
- Fixes a number of race conditions.

With much feedback from matt@ and plunky@.

branches: 1.110.6; 1.110.8;
Start patching up the kernel so that a network driver always has
the opportunity to handle an ioctl before generic ifioctl handling
occurs. This will ease extending the kernel and sharing of code
between drivers.

First steps: Make the signature of ifioctl_common() match struct
ifinet->if_ioctl. Convert SIOCSIFCAP and SIOCSIFMTU to the new
ifioctl() regime, throughout the kernel.

Call ttyflush() with tty_lock held.

branches: 1.108.2; 1.108.4;
Use the softint API.

branches: 1.107.2;
Use ifreq_setaddr(), ifreq_getaddr(), sockaddr_in_init(), and
sockaddr_copy(). Constify. Compare pointers with NULL, not 0.
Don't "test truth" of pointers, but compare with NULL.

branches: 1.106.2; 1.106.6; 1.106.8;
Generic soft interrupts are mandatory.

branches: 1.105.2;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

KNF: de-__P, bzero -> memset, bcmp -> memcmp. Remove extraneous
parentheses in return statements.

Cosmetic: don't open-code TAILQ_FOREACH().

Cosmetic: change types of variables to avoid oodles of casts: in
in6_src.c, avoid casts by changing several route_in6 pointers
to struct route pointers. Remove unnecessary casts to caddr_t
elsewhere.

Pave the way for eliminating address family-specific route caches:
soon, struct route will not embed a sockaddr, but it will hold
a reference to an external sockaddr, instead. We will set the
destination sockaddr using rtcache_setdst(). (I created a stub
for it, but it isn't used anywhere, yet.) rtcache_free() will
free the sockaddr. I have extracted from rtcache_free() a helper
subroutine, rtcache_clear(). rtcache_clear() will "forget" a
cached route, but it will not forget the destination by releasing
the sockaddr. I use rtcache_clear() instead of rtcache_free()
in rtcache_update(), because rtcache_update() is not supposed
to forget the destination.

Constify:

1 Introduce const accessor for route->ro_dst, rtcache_getdst().

2 Constify the 'dst' argument to ifnet->if_output(). This
led me to constify a lot of code called by output routines.

3 Constify the sockaddr argument to protosw->pr_ctlinput. This
led me to constify a lot of code called by ctlinput routines.

4 Introduce const macros for converting from a generic sockaddr
to family-specific sockaddrs, e.g., sockaddr_in: satocsin6,
satocsin, et cetera.

branches: 1.103.2;
Consistent usage of KAUTH_GENERIC_ISSUSER.

__unused removal on arguments; approved by core.

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

branches: 1.100.4; 1.100.6;
Use the LWP cached credentials where sane.

KNF.

branches: 1.98.2;
merge FreeBSD timecounters from branch simonb-timecounters
- struct timeval time is gone
time.tv_sec -> time_second
- struct timeval mono_time is gone
mono_time.tv_sec -> time_uptime
- access to time via
{get,}{micro,nano,bin}time()
get* versions are fast but less precise
- support NTP nanokernel implementation (NTP API 4)
- further reading:
Timecounter Paper: http://phk.freebsd.dk/pubs/timecounter.pdf
NTP Nanokernel: http://www.eecis.udel.edu/~mills/ntp/html/kern.html

branches: 1.97.2;
integrate kauth.

branches: 1.96.2; 1.96.4; 1.96.6;
Provide ppp like statistics instead of grovelling through the kernel
symbols.

branches: 1.95.4; 1.95.6;
ANSI function decls and application of static.

merge ktrace-lwp.

Overhaul how TTY line disciplines are handled:
- Replace references to linesw[0] with a ttyldisc_default() function
that returns the default ("termios") line discipline.
- The linesw[] array is gone, replaced by a linked list.
- ttyldisc_add() and ttyldisc_remove() have been replaced by
ttyldisc_attach() and ttyldisc_detach().
- Things that provide line disciplines are now responsible for
registering those disciplines with the system. The linesw
structures are no longer declared in tty_conf.c
- Line disciplines are now refcounted; a lookup causes a reference to
be held. ttyldisc_release() releases the reference. Attempts to
detach an in-use line discipline result in EBUSY.
- Fix function signature lossage in if_sl.c, if_strip.c, and tty_tb.c
that was masked by the old tty_conf.c
- tty_init() is no longer necessary; delete it and its call from main().

branches: 1.92.6;
- introduce M_MOVE_PKTHDR and use it where appropriate.
intended to be mostly API compatible with openbsd/freebsd.
- remove a glue #define in netipsec/ipsec_osdep.h.

branches: 1.91.2;
factor out the interface queueing code into two functions. One used by
the non point-to-point interfaces that has one queue, and one used by
the point to point interfaces that has two queues. No functional changes.
XXX: The ALTQ stuff makes the code ugly.
XXX: More cleanup to come

branches: 1.90.4;
Sprinkle #ifdef INET to make a GENERIC kernel compile with INET undefined.

Don't forget to call bpfdetach in the clone destroy function.
While here, add a missing static and change some spaces to tabs.

Fix what must have been an omission: missing brace and a leftover
use of `i', which is no longer defined. Fixes build problem for ports
not defining __HAVE_GENERIC_SOFT_INTERRUPTS.

clonify strip and sl.

Factor out the hand-crafting of mbufs from the interface files. Reviewed by
gimpy. XXX: I could have used bpf_mtap2 on some of the new functions, but I
chose not to, because I just wanted to do what amounts to a code move.

kill sprintf, use snprintf

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.83.2;
bpf_mtap() does not care about M_PKTHDR at the top. M_COPY_PKTHDR has some
consequences, so avoid it. if we need to attach dummy headers, we should
use M_PREPEND instead.

Add MBUFTRACE kernel option.
Do a little mbuf rework while here. Change all uses of MGET*(*, M_WAIT, *)
to m_get*(M_WAIT, *). These are not performance critical and making them
call m_get saves considerable space. Add m_clget analogue of MCLGET and
make corresponding change for M_WAIT uses.
Modify netinet, gem, fxp, tulip, nfs to support MBUFTRACE.
Begin to change netstat to use sysctl.

KNF - return is not a function.

Convert ioctl code to use EPASSTHROUGH instead of -1 or ENOTTY for
indicating an unhandled "command". ERESTART is -1, which can lead to
confusion. ERESTART has been moved to -3 and EPASSTHROUGH has been
placed at -4. No ioctl code should now return -1 anywhere. The
ioctl() system call is now properly restartable.

Include <machine/intr.h> unconditionally, instead of only doing so if
__HAVE_GENERIC_SOFT_INTERRUPTS and relying on <sys/param.h> to provide it
otherwise; pointed out by Aymeric Vincent.

add RCSIDs

branches: 1.77.2;
Fix slight glitch from rev. 1.70: bp is not adjusted for next loop after
outputting some data.
Fix provided by isaki@par.odn.ne.jp in PR kern/13472.

branches: 1.76.2;
change the meaning of ifnet.if_lastchange to meet RFC1573 ifLastChange.
follows BSD/OS practice and ucd-snmp code (FreeBSD does it for specific
interfaces only).

was: if_lastchange get updated on every packet transmission/receipt.
now: if_lastchange get updated when IFF_UP is changed.

fix mbuf leak due to meaningless MGETHDR. from niels provos

Remove the use of splimp() from the NetBSD kernel. splnet()
and only splnet() is allowed for the protection of data structures
used by network devices.

Remove unnecessary test of tp->t_linesw against NULL; they are results
of confusion while correcting compilation error after t_line is
replaced with t_linesw.

branches: 1.72.2;
Fix a rather annoying problem where the sockaddr_dl which holds
the link level name for the interface (ifp->if_sadl) is allocated
before ifp->if_addrlen is initialized, which could lead to allocating
too little space for the link level address.

Do this by splitting allocation of the link level name out of
if_attach() and into if_alloc_sadl(), which is normally called
by functions like ether_ifattach(). Network interfaces which
don't have a link-specific attach routine must call if_alloc_sadl()
themselves (example: gif).

Link level names are freed by if_free_sadl(), which can be called
from e.g. ether_ifdetach(). Drivers never need call if_free_sadl()
themselves as if_detach() will do it if it is not already done.

While here, add the ability to pass an AF_LINK address to
SIOCSIFADDR in ether_ioctl() (this is what caused me to notice
the problem that the above fixes).

For SLIP/STRIP/PPP, use generic soft interrupts, if available.

After freeing the input buffer, set the pointer to it to NULL.

Don't use splimp() to block both net and tty interrupts. Instead,
block both interrupt levels as appropriate.

Plug a memory leak.

Defer output processing to the software interrupt.

Move the VJ uncompress code into the software interrupt.

Once we have a complete frame, schedule a SLIP software interrupt,
and manipulate ipintrq from there. This will allow us to clean up
the use of splimp() in this file later.

Make the buffer management in SLIP just a little less evil.

ALTQ'ify.

Fill in if_dlt.

Adapt to bpfattach() changes, and further centralize the bpfattach()
and bpfdetach() calls into link-type subroutines where possible.

Set the default line discipline to t_linesw, rather than just NULL it.

Adapt to the new line discipline scheme.

NetBSD -> __NetBSD__ in an #ifdef, and nuke sc_bpf; there's one in
the ifnet already.

Kill some more register declarations.

Don't need to include <sys/conf.h> here.

branches: 1.55.8;
fixes to compile if NBPFILTER == 0

Make it possible to set MTU via "ifconfig" at run time. "SLMTU" is now
used to set the initial value.

branches: 1.53.4;
Use #error instead of causing parse errors; noticed by Heiko.

use __NetBSD__ not NetBSD

use #ifdef INET so this compiles again

defopt INET, NETATALK.

Add missing comma.

add the ability to run SLIP with CLOCAL set, per PR#3586

Merge with Lite2 + local changes

Update to ppp-2.3b5

Update for the new mbuf code, in a slighly kludgy way. Basically, these
drivers played a somewhat evil trick with clusters, which is now
replaced by a somewhat evil trick with regular malloc'd memory.

backout previous kprintf change

- printf -> kprintf, sprintf -> ksprintf

use sc_unit instead of pointer arthimetic.

print difference between pointers with %ld, so that -Wformat works
on the Alpha and for consistency. Also, other minor formatting cleanups.

Move a mis-placed line on slattach() so that SLIOCGUNIT works properly.
From Jonathan O'Brien <obrien@phoenix.sfsu.edu>.

branches: 1.39.4;
Changed struct ifnet to have a pointer to the softc of the underlying
device and a printable "external name" (name + unit number), thus eliminating
if_name and if_unit. Updated interface to (*if_watchdog)() and (*if_reset)()
to take a struct ifnet *, rather than a unit number.

Net prototypes

splnet --> splsoftnet

There's no reason to set if_next here.

Update to use timer{add,sub}().

fixed sized types, where appropriate. when casting pointers to
integers to do math on them, cast to long. ioctl commands are
u_longs.

timevalsub --> __timersub

be more careful with types, also pull in headers where necessary.

use NetBSD (defined in param.h) not __NetBSD__ to allow x-compilation
with native compiler.

kill bogus external declaration of time

branches: 1.29.2;
New RCS ID's, take two. they're more aesthecially pleasant, and use 'NetBSD'

Update to 4.4-Lite networking code, with a few local changes.

Some stability/safety/extensibility patches. Inspired by Christoph Badura.
Always make sure our buffer is large enough, and restart hung lines.

mccanne convinced me that slip.h *should* exist. this is what
i "implemented" for 4.4, and the adjustments to the other files to
match.

Remove an #ifdef we no longer need.

Multicast is no longer optional

quench the grammar flames!

serious cleanup

include machine/cpu.h, for machines which define soft interrupt stuff
there. marked XXX; they prolly shouldn't do that...

Canonicalize all #includes.

move slip compression configuration into the interface flags,
and diddle a couple of related things.

multicast support.
From Chris Maeda, cmaeda@cs.washington.edu
These patches are derived from the IP Multicast patches for BSDI.

T_LINEP member of struct tty becomes t_sc. This replaces the
#define t_sc T_LINEP
that appear in tty_tb.c, if_sl.c, and if_ppp.h

removed slip and ppp specific prototypes from tty.h where they didn't belong.
moved them to tty_conf.c within #if Nwhatever > 0 where they do belong.
made sure that if_sl.c, and if_ppp.c still compile quietly.

Call output routine redundantly to possible avoid some hangs due to missed
interrupts.

Ignore carrier if not using hardware carrier detect (i.e. CLOCAL is set).

Ignore TS_CARR_ON when CLOCAL is set.

branches: 1.12.2;
add an additional suser() check.
regular users should not be able to change slip interface characteristics!

Add RCS identifiers (this time on the correct side of the branch), and
incorporate recent changes in netbsd-0-9 branch.

Change tty code to use clist interface, but with ring buffer implementation.
Also, fix a couple of bugs in tty.c and pccons.c, and some gross kluginess
in the hp300 stuff.

ANSIfications - removed all implicit function return types and argument
definitions. Ensured that all files include "systm.h" to gain access to
general prototypes. Casts where necessary.

add include of select.h if necessary for protos, or delete if extraneous

make kernel select interface be one-stop shopping & clean it all up.

ring buffer now uses rbchar's (shorts) instead of chars.

bump slip MTU back down to 296...

one line got botched during bpf patch installation

added BPF support, as provided by David Greenman (davidg@implode.rain.com)

after 0.2.2 "stable" patches applied

branches: 1.1.1;
Initial revision

Ensure that all queues passed to ifq_enqueue2() have a valid ifq_lock.

Use IFQ_SET_MAXLEN() rather than open-coding it.

Adopt <net/if_stats.h>.

branches: 1.131.6;
Add comments about D_MPSAFE to functions called as struct linesw.l_ioctl.

Replace: M_MOVE_PKTHDR -> m_move_pkthdr. No functional change, since the
former is a macro to the latter.

branches: 1.129.2;
SIOCSIFDSTADDR uses struct ifreq instead of struct ifaddr or struct in_aliasreq.

SIOCSIFDSTADDR is not used by base package commands...

I checked sys/net*/* only.

branches: 1.128.10;
if MGETHDR fails, don't try to copy to single mbuf and deref null.

reduce ifdefs.

branches: 1.127.2;
MFREE -> m_free

modularize some more drivers and merge the module glue

make strip and slip modular, and cosmetic for ppp.

branches: 1.124.2;
Introduce m_set_rcvif and m_reset_rcvif

The API is used to set (or reset) a received interface of a mbuf.
They are counterpart of m_get_rcvif, which will come in another
commit, hide internal of rcvif operation, and reduce the diff of
the upcoming change.

No functional change.

Constify rtentry of if_output

We no longer need to change rtentry below if_output.

The change makes it clear where rtentries are changed (or not)
and helps forthcoming locking (os psrefing) rtentries.

IFQ_ENQUEUE refactor (3/3) : eliminate pktattr argument from IFQ_ENQUEUE caller

sprinkle _KERNEL_OPT

Honor pseudo attach decl generated by config(1).

branches: 1.119.4;
- Implement pktqueue interface for lockless IP input queue.
- Replace ipintrq and ip6intrq with the pktqueue mechanism.
- Eliminate kernel-lock from ipintr() and ip6intr().
- Some preparation work to push softnet_lock out of ipintr().

Discussed on tech-net.

branches: 1.118.12; 1.118.26;
Change obsolete CBSIZE constant (48), to a power of two constant (64) that
is close enough to match the original assumptions.

Push the bpf_ops usage back into bpf.h. Push the common ifp->if_bpf
check into the inline functions as well the fourth argument for
bpf_attach.

branches: 1.116.2; 1.116.4;
Redefine bpf linkage through an always present op vector, i.e.
#if NBPFILTER is no longer required in the client. This change
doesn't yet add support for loading bpf as a module, since drivers
can register before bpf is attached. However, callers of bpf can
now be modularized.

Dynamically loadable bpf could probably be done fairly easily with
coordination from the stub driver and the real driver by registering
attachments in the stub before the real driver is loaded and doing
a handoff. ... and I'm not going to ponder the depths of unload
here.

Tested with i386/MONOLITHIC, modified MONOLITHIC without bpf and rump.

Introduce actions/requests to handle authorization for ppp(4), sl(4),
strip(4), btuart(4) and bcsp(4) network interfaces and devices.

Mailing list reference:

http://mail-index.netbsd.org/tech-kern/2009/04/27/msg004955.html

branches: 1.114.2;
kill MALLOC and FREE macros.

*** Summary ***

When a link-layer address changes (e.g., ifconfig ex0 link
02:de:ad:be:ef:02 active), send a gratuitous ARP and/or a Neighbor
Advertisement to update the network-/link-layer address bindings
on our LAN peers.

Refuse a change of ethernet address to the address 00:00:00:00:00:00
or to any multicast/broadcast address. (Thanks matt@.)

Reorder ifnet ioctl operations so that driver ioctls may inherit
the functions of their "class"---ether_ioctl(), fddi_ioctl(), et
cetera---and the class ioctls may inherit from the generic ioctl,
ifioctl_common(), but both driver- and class-ioctls may override
the generic behavior. Make network drivers share more code.

Distinguish a "factory" link-layer address from others for the
purposes of both protecting that address from deletion and computing
EUI64.

Return consistent, appropriate error codes from network drivers.

Improve readability. KNF.

*** Details ***

In if_attach(), always initialize the interface ioctl routine,
ifnet->if_ioctl, if the driver has not already initialized it.
Delete if_ioctl == NULL tests everywhere else, because it cannot
happen.

In the ioctl routines of network interfaces, inherit common ioctl
behaviors by calling either ifioctl_common() or whichever ioctl
routine is appropriate for the class of interface---e.g., ether_ioctl()
for ethernets.

Stop (ab)using SIOCSIFADDR and start to use SIOCINITIFADDR. In
the user->kernel interface, SIOCSIFADDR's argument was an ifreq,
but on the protocol->ifnet interface, SIOCSIFADDR's argument was
an ifaddr. That was confusing, and it would work against me as I
make it possible for a network interface to overload most ioctls.
On the protocol->ifnet interface, replace SIOCSIFADDR with
SIOCINITIFADDR. In ifioctl(), return EPERM if userland tries to
invoke SIOCINITIFADDR.

In ifioctl(), give the interface the first shot at handling most
interface ioctls, and give the protocol the second shot, instead
of the other way around. Finally, let compatibility code (COMPAT_OSOCK)
take a shot.

Pull device initialization out of switch statements under
SIOCINITIFADDR. For example, pull ..._init() out of any switch
statement that looks like this:

switch (...->sa_family) {
case ...:
..._init();
...
break;
...
default:
..._init();
...
break;
}

Rewrite many if-else clauses that handle all permutations of IFF_UP
and IFF_RUNNING to use a switch statement,

switch (x & (IFF_UP|IFF_RUNNING)) {
case 0:
...
break;
case IFF_RUNNING:
...
break;
case IFF_UP:
...
break;
case IFF_UP|IFF_RUNNING:
...
break;
}

unifdef lots of code containing #ifdef FreeBSD, #ifdef NetBSD, and
#ifdef SIOCSIFMTU, especially in fwip(4) and in ndis(4).

In ipw(4), remove an if_set_sadl() call that is out of place.

In nfe(4), reuse the jumbo MTU logic in ether_ioctl().

Let ethernets register a callback for setting h/w state such as
promiscuous mode and the multicast filter in accord with a change
in the if_flags: ether_set_ifflags_cb() registers a callback that
returns ENETRESET if the caller should reset the ethernet by calling
if_init(), 0 on success, != 0 on failure. Pull common code from
ex(4), gem(4), nfe(4), sip(4), tlp(4), vge(4) into ether_ioctl(),
and register if_flags callbacks for those drivers.

Return ENOTTY instead of EINVAL for inappropriate ioctls. In
zyd(4), use ENXIO instead of ENOTTY to indicate that the device is
not any longer attached.

Add to if_set_sadl() a boolean 'factory' argument that indicates
whether a link-layer address was assigned by the factory or some
other source. In a comment, recommend using the factory address
for generating an EUI64, and update in6_get_hw_ifid() to prefer a
factory address to any other link-layer address.

Add a routing message, RTM_LLINFO_UPD, that tells protocols to
update the binding of network-layer addresses to link-layer addresses.
Implement this message in IPv4 and IPv6 by sending a gratuitous
ARP or a neighbor advertisement, respectively. Generate RTM_LLINFO_UPD
messages on a change of an interface's link-layer address.

In ether_ioctl(), do not let SIOCALIFADDR set a link-layer address
that is broadcast/multicast or equal to 00:00:00:00:00:00.

Make ether_ioctl() call ifioctl_common() to handle ioctls that it
does not understand.

In gif(4), initialize if_softc and use it, instead of assuming that
the gif_softc and ifp overlap.

Let ifioctl_common() handle SIOCGIFADDR.

Sprinkle rtcache_invariants(), which checks on DIAGNOSTIC kernels
that certain invariants on a struct route are satisfied.

In agr(4), rewrite agr_ioctl_filter() to be a bit more explicit
about the ioctls that we do not allow on an agr(4) member interface.

bzero -> memset. Delete unnecessary casts to void *. Use
sockaddr_in_init() and sockaddr_in6_init(). Compare pointers with
NULL instead of "testing truth". Replace some instances of (type
*)0 with NULL. Change some K&R prototypes to ANSI C, and join
lines.

branches: 1.112.2; 1.112.4;
- add if_alloc (ours just mallocs), and if_initname and use them (from FreeBSD)
- kill memsets where M_ZERO can be used.

branches: 1.111.2; 1.111.4; 1.111.6;
Merge the socket locking patch:

- Socket layer becomes MP safe.
- Unix protocols become MP safe.
- Allows protocol processing interrupts to safely block on locks.
- Fixes a number of race conditions.

With much feedback from matt@ and plunky@.

branches: 1.110.6; 1.110.8;
Start patching up the kernel so that a network driver always has
the opportunity to handle an ioctl before generic ifioctl handling
occurs. This will ease extending the kernel and sharing of code
between drivers.

First steps: Make the signature of ifioctl_common() match struct
ifinet->if_ioctl. Convert SIOCSIFCAP and SIOCSIFMTU to the new
ifioctl() regime, throughout the kernel.

Call ttyflush() with tty_lock held.

branches: 1.108.2; 1.108.4;
Use the softint API.

branches: 1.107.2;
Use ifreq_setaddr(), ifreq_getaddr(), sockaddr_in_init(), and
sockaddr_copy(). Constify. Compare pointers with NULL, not 0.
Don't "test truth" of pointers, but compare with NULL.

branches: 1.106.2; 1.106.6; 1.106.8;
Generic soft interrupts are mandatory.

branches: 1.105.2;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

KNF: de-__P, bzero -> memset, bcmp -> memcmp. Remove extraneous
parentheses in return statements.

Cosmetic: don't open-code TAILQ_FOREACH().

Cosmetic: change types of variables to avoid oodles of casts: in
in6_src.c, avoid casts by changing several route_in6 pointers
to struct route pointers. Remove unnecessary casts to caddr_t
elsewhere.

Pave the way for eliminating address family-specific route caches:
soon, struct route will not embed a sockaddr, but it will hold
a reference to an external sockaddr, instead. We will set the
destination sockaddr using rtcache_setdst(). (I created a stub
for it, but it isn't used anywhere, yet.) rtcache_free() will
free the sockaddr. I have extracted from rtcache_free() a helper
subroutine, rtcache_clear(). rtcache_clear() will "forget" a
cached route, but it will not forget the destination by releasing
the sockaddr. I use rtcache_clear() instead of rtcache_free()
in rtcache_update(), because rtcache_update() is not supposed
to forget the destination.

Constify:

1 Introduce const accessor for route->ro_dst, rtcache_getdst().

2 Constify the 'dst' argument to ifnet->if_output(). This
led me to constify a lot of code called by output routines.

3 Constify the sockaddr argument to protosw->pr_ctlinput. This
led me to constify a lot of code called by ctlinput routines.

4 Introduce const macros for converting from a generic sockaddr
to family-specific sockaddrs, e.g., sockaddr_in: satocsin6,
satocsin, et cetera.

branches: 1.103.2;
Consistent usage of KAUTH_GENERIC_ISSUSER.

__unused removal on arguments; approved by core.

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

branches: 1.100.4; 1.100.6;
Use the LWP cached credentials where sane.

KNF.

branches: 1.98.2;
merge FreeBSD timecounters from branch simonb-timecounters
- struct timeval time is gone
time.tv_sec -> time_second
- struct timeval mono_time is gone
mono_time.tv_sec -> time_uptime
- access to time via
{get,}{micro,nano,bin}time()
get* versions are fast but less precise
- support NTP nanokernel implementation (NTP API 4)
- further reading:
Timecounter Paper: http://phk.freebsd.dk/pubs/timecounter.pdf
NTP Nanokernel: http://www.eecis.udel.edu/~mills/ntp/html/kern.html

branches: 1.97.2;
integrate kauth.

branches: 1.96.2; 1.96.4; 1.96.6;
Provide ppp like statistics instead of grovelling through the kernel
symbols.

branches: 1.95.4; 1.95.6;
ANSI function decls and application of static.

merge ktrace-lwp.

Overhaul how TTY line disciplines are handled:
- Replace references to linesw[0] with a ttyldisc_default() function
that returns the default ("termios") line discipline.
- The linesw[] array is gone, replaced by a linked list.
- ttyldisc_add() and ttyldisc_remove() have been replaced by
ttyldisc_attach() and ttyldisc_detach().
- Things that provide line disciplines are now responsible for
registering those disciplines with the system. The linesw
structures are no longer declared in tty_conf.c
- Line disciplines are now refcounted; a lookup causes a reference to
be held. ttyldisc_release() releases the reference. Attempts to
detach an in-use line discipline result in EBUSY.
- Fix function signature lossage in if_sl.c, if_strip.c, and tty_tb.c
that was masked by the old tty_conf.c
- tty_init() is no longer necessary; delete it and its call from main().

branches: 1.92.6;
- introduce M_MOVE_PKTHDR and use it where appropriate.
intended to be mostly API compatible with openbsd/freebsd.
- remove a glue #define in netipsec/ipsec_osdep.h.

branches: 1.91.2;
factor out the interface queueing code into two functions. One used by
the non point-to-point interfaces that has one queue, and one used by
the point to point interfaces that has two queues. No functional changes.
XXX: The ALTQ stuff makes the code ugly.
XXX: More cleanup to come

branches: 1.90.4;
Sprinkle #ifdef INET to make a GENERIC kernel compile with INET undefined.

Don't forget to call bpfdetach in the clone destroy function.
While here, add a missing static and change some spaces to tabs.

Fix what must have been an omission: missing brace and a leftover
use of `i', which is no longer defined. Fixes build problem for ports
not defining __HAVE_GENERIC_SOFT_INTERRUPTS.

clonify strip and sl.

Factor out the hand-crafting of mbufs from the interface files. Reviewed by
gimpy. XXX: I could have used bpf_mtap2 on some of the new functions, but I
chose not to, because I just wanted to do what amounts to a code move.

kill sprintf, use snprintf

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.83.2;
bpf_mtap() does not care about M_PKTHDR at the top. M_COPY_PKTHDR has some
consequences, so avoid it. if we need to attach dummy headers, we should
use M_PREPEND instead.

Add MBUFTRACE kernel option.
Do a little mbuf rework while here. Change all uses of MGET*(*, M_WAIT, *)
to m_get*(M_WAIT, *). These are not performance critical and making them
call m_get saves considerable space. Add m_clget analogue of MCLGET and
make corresponding change for M_WAIT uses.
Modify netinet, gem, fxp, tulip, nfs to support MBUFTRACE.
Begin to change netstat to use sysctl.

KNF - return is not a function.

Convert ioctl code to use EPASSTHROUGH instead of -1 or ENOTTY for
indicating an unhandled "command". ERESTART is -1, which can lead to
confusion. ERESTART has been moved to -3 and EPASSTHROUGH has been
placed at -4. No ioctl code should now return -1 anywhere. The
ioctl() system call is now properly restartable.

Include <machine/intr.h> unconditionally, instead of only doing so if
__HAVE_GENERIC_SOFT_INTERRUPTS and relying on <sys/param.h> to provide it
otherwise; pointed out by Aymeric Vincent.

add RCSIDs

branches: 1.77.2;
Fix slight glitch from rev. 1.70: bp is not adjusted for next loop after
outputting some data.
Fix provided by isaki@par.odn.ne.jp in PR kern/13472.

branches: 1.76.2;
change the meaning of ifnet.if_lastchange to meet RFC1573 ifLastChange.
follows BSD/OS practice and ucd-snmp code (FreeBSD does it for specific
interfaces only).

was: if_lastchange get updated on every packet transmission/receipt.
now: if_lastchange get updated when IFF_UP is changed.

fix mbuf leak due to meaningless MGETHDR. from niels provos

Remove the use of splimp() from the NetBSD kernel. splnet()
and only splnet() is allowed for the protection of data structures
used by network devices.

Remove unnecessary test of tp->t_linesw against NULL; they are results
of confusion while correcting compilation error after t_line is
replaced with t_linesw.

branches: 1.72.2;
Fix a rather annoying problem where the sockaddr_dl which holds
the link level name for the interface (ifp->if_sadl) is allocated
before ifp->if_addrlen is initialized, which could lead to allocating
too little space for the link level address.

Do this by splitting allocation of the link level name out of
if_attach() and into if_alloc_sadl(), which is normally called
by functions like ether_ifattach(). Network interfaces which
don't have a link-specific attach routine must call if_alloc_sadl()
themselves (example: gif).

Link level names are freed by if_free_sadl(), which can be called
from e.g. ether_ifdetach(). Drivers never need call if_free_sadl()
themselves as if_detach() will do it if it is not already done.

While here, add the ability to pass an AF_LINK address to
SIOCSIFADDR in ether_ioctl() (this is what caused me to notice
the problem that the above fixes).

For SLIP/STRIP/PPP, use generic soft interrupts, if available.

After freeing the input buffer, set the pointer to it to NULL.

Don't use splimp() to block both net and tty interrupts. Instead,
block both interrupt levels as appropriate.

Plug a memory leak.

Defer output processing to the software interrupt.

Move the VJ uncompress code into the software interrupt.

Once we have a complete frame, schedule a SLIP software interrupt,
and manipulate ipintrq from there. This will allow us to clean up
the use of splimp() in this file later.

Make the buffer management in SLIP just a little less evil.

ALTQ'ify.

Fill in if_dlt.

Adapt to bpfattach() changes, and further centralize the bpfattach()
and bpfdetach() calls into link-type subroutines where possible.

Set the default line discipline to t_linesw, rather than just NULL it.

Adapt to the new line discipline scheme.

NetBSD -> __NetBSD__ in an #ifdef, and nuke sc_bpf; there's one in
the ifnet already.

Kill some more register declarations.

Don't need to include <sys/conf.h> here.

branches: 1.55.8;
fixes to compile if NBPFILTER == 0

Make it possible to set MTU via "ifconfig" at run time. "SLMTU" is now
used to set the initial value.

branches: 1.53.4;
Use #error instead of causing parse errors; noticed by Heiko.

use __NetBSD__ not NetBSD

use #ifdef INET so this compiles again

defopt INET, NETATALK.

Add missing comma.

add the ability to run SLIP with CLOCAL set, per PR#3586

Merge with Lite2 + local changes

Update to ppp-2.3b5

Update for the new mbuf code, in a slighly kludgy way. Basically, these
drivers played a somewhat evil trick with clusters, which is now
replaced by a somewhat evil trick with regular malloc'd memory.

backout previous kprintf change

- printf -> kprintf, sprintf -> ksprintf

use sc_unit instead of pointer arthimetic.

print difference between pointers with %ld, so that -Wformat works
on the Alpha and for consistency. Also, other minor formatting cleanups.

Move a mis-placed line on slattach() so that SLIOCGUNIT works properly.
From Jonathan O'Brien <obrien@phoenix.sfsu.edu>.

branches: 1.39.4;
Changed struct ifnet to have a pointer to the softc of the underlying
device and a printable "external name" (name + unit number), thus eliminating
if_name and if_unit. Updated interface to (*if_watchdog)() and (*if_reset)()
to take a struct ifnet *, rather than a unit number.

Net prototypes

splnet --> splsoftnet

There's no reason to set if_next here.

Update to use timer{add,sub}().

fixed sized types, where appropriate. when casting pointers to
integers to do math on them, cast to long. ioctl commands are
u_longs.

timevalsub --> __timersub

be more careful with types, also pull in headers where necessary.

use NetBSD (defined in param.h) not __NetBSD__ to allow x-compilation
with native compiler.

kill bogus external declaration of time

branches: 1.29.2;
New RCS ID's, take two. they're more aesthecially pleasant, and use 'NetBSD'

Update to 4.4-Lite networking code, with a few local changes.

Some stability/safety/extensibility patches. Inspired by Christoph Badura.
Always make sure our buffer is large enough, and restart hung lines.

mccanne convinced me that slip.h *should* exist. this is what
i "implemented" for 4.4, and the adjustments to the other files to
match.

Remove an #ifdef we no longer need.

Multicast is no longer optional

quench the grammar flames!

serious cleanup

include machine/cpu.h, for machines which define soft interrupt stuff
there. marked XXX; they prolly shouldn't do that...

Canonicalize all #includes.

move slip compression configuration into the interface flags,
and diddle a couple of related things.

multicast support.
From Chris Maeda, cmaeda@cs.washington.edu
These patches are derived from the IP Multicast patches for BSDI.

T_LINEP member of struct tty becomes t_sc. This replaces the
#define t_sc T_LINEP
that appear in tty_tb.c, if_sl.c, and if_ppp.h

removed slip and ppp specific prototypes from tty.h where they didn't belong.
moved them to tty_conf.c within #if Nwhatever > 0 where they do belong.
made sure that if_sl.c, and if_ppp.c still compile quietly.

Call output routine redundantly to possible avoid some hangs due to missed
interrupts.

Ignore carrier if not using hardware carrier detect (i.e. CLOCAL is set).

Ignore TS_CARR_ON when CLOCAL is set.

branches: 1.12.2;
add an additional suser() check.
regular users should not be able to change slip interface characteristics!

Add RCS identifiers (this time on the correct side of the branch), and
incorporate recent changes in netbsd-0-9 branch.

Change tty code to use clist interface, but with ring buffer implementation.
Also, fix a couple of bugs in tty.c and pccons.c, and some gross kluginess
in the hp300 stuff.

ANSIfications - removed all implicit function return types and argument
definitions. Ensured that all files include "systm.h" to gain access to
general prototypes. Casts where necessary.

add include of select.h if necessary for protos, or delete if extraneous

make kernel select interface be one-stop shopping & clean it all up.

ring buffer now uses rbchar's (shorts) instead of chars.

bump slip MTU back down to 296...

one line got botched during bpf patch installation

added BPF support, as provided by David Greenman (davidg@implode.rain.com)

after 0.2.2 "stable" patches applied

branches: 1.1.1;
Initial revision

Adopt <net/if_stats.h>.