Commit Graph

38 Commits

Author SHA1 Message Date
Gleb Smirnoff
08b68b0e4c A major overhaul of the CARP implementation. The ip_carp.c was started
from scratch, copying needed functionality from the old implemenation
on demand, with a thorough review of all code. The main change is that
interface layer has been removed from the CARP. Now redundant addresses
are configured exactly on the interfaces, they run on.

The CARP configuration itself is, as before, configured and read via
SIOCSVH/SIOCGVH ioctls. A new prefix created with SIOCAIFADDR or
SIOCAIFADDR_IN6 may now be configured to a particular virtual host id,
which makes the prefix redundant.

ifconfig(8) semantics has been changed too: now one doesn't need
to clone carpXX interface, he/she should directly configure a vhid
on a Ethernet interface.

To supply vhid data from the kernel to an application the getifaddrs(8)
function had been changed to pass ifam_data with each address. [1]

The new implementation definitely closes all PRs related to carp(4)
being an interface, and may close several others. It also allows
to run a single redundant IP per interface.

Big thanks to Bjoern Zeeb for his help with inet6 part of patch, for
idea on using ifam_data and for several rounds of reviewing!

PR:		kern/117000, kern/126945, kern/126714, kern/120130, kern/117448
Reviewed by:	bz
Submitted by:	bz [1]
2011-12-16 12:16:56 +00:00
Navdeep Parhar
9a31144537 Add arp_update_event. This replaces route_arp_update_event, which
has not worked since the arp-v2 rewrite.

The event handler will be called with the llentry write-locked and
can examine la_flags to determine whether the entry is being added
or removed.

Reviewed by:	gnn, kmacy
Approved by:	gnn (mentor)
MFC after:	1 month
2009-09-08 21:17:17 +00:00
Luigi Rizzo
281c8daea2 remove dependency on net/if.h of this header 2009-02-16 15:07:40 +00:00
Qing Li
6e6b3f7cbc This main goals of this project are:
1. separating L2 tables (ARP, NDP) from the L3 routing tables
2. removing as much locking dependencies among these layers as
   possible to allow for some parallelism in the search operations
3. simplify the logic in the routing code,

The most notable end result is the obsolescent of the route
cloning (RTF_CLONING) concept, which translated into code reduction
in both IPv4 ARP and IPv6 NDP related modules, and size reduction in
struct rtentry{}. The change in design obsoletes the semantics of
RTF_CLONING, RTF_WASCLONE and RTF_LLINFO routing flags. The userland
applications such as "arp" and "ndp" have been modified to reflect
those changes. The output from "netstat -r" shows only the routing
entries.

Quite a few developers have contributed to this project in the
past: Glebius Smirnoff, Luigi Rizzo, Alessandro Cerri, and
Andre Oppermann. And most recently:

- Kip Macy revised the locking code completely, thus completing
  the last piece of the puzzle, Kip has also been conducting
  active functional testing
- Sam Leffler has helped me improving/refactoring the code, and
  provided valuable reviews
- Julian Elischer setup the perforce tree for me and has helped
  me maintaining that branch before the svn conversion
2008-12-15 06:10:57 +00:00
Julian Elischer
b6ae6984e8 Don't duplicate the whole of arpresolve to arpresolve 2 for the sake
of two compares against 0. The negative effect of cache flushing
is probably more than the gain by not doing the two compares (the
value is almost certainly in register or at worst, cache).
Note that the uses of m_freem() are in error cases and m_freem()
handles NULL anyhow. So fast-path really isn't changed much at all.
2007-12-31 23:48:06 +00:00
Kip Macy
29910a5a77 widen the routing event interface (arp update, redirect, and eventually pmtu change)
into separate functions

revert previous commit's changes to arpresolve and add a new interface
arpresolve2 which does arp resolution without an mbuf
2007-12-17 07:40:34 +00:00
Gleb Smirnoff
a97719482d Add CARP (Common Address Redundancy Protocol), which allows multiple
hosts to share an IP address, providing high availability and load
balancing.

Original work on CARP done by Michael Shalayeff, with many
additions by Marco Pfatschbacher and Ryan McBride.

FreeBSD port done solely by Max Laier.

Patch by:	mlaier
Obtained from:	OpenBSD (mickey, mcbride)
2005-02-22 13:04:05 +00:00
Warner Losh
c398230b64 /* -> /*- for license, minor formatting changes 2005-01-07 01:45:51 +00:00
Warner Losh
f36cfd49ad Remove advertising clause from University of California Regent's
license, per letter dated July 22, 1999 and email from Peter Wemm,
Alan Cox and Robert Watson.

Approved by: core, peter, alc, rwatson
2004-04-07 20:46:16 +00:00
Luigi Rizzo
f7c5baa1c6 + arpresolve(): remove an unused argument
+ struct ifnet: remove unused fields, move ipv6-related field close
  to each other, add a pointer to l3<->l2 translation tables (arp,nd6,
  etc.) for future use.

+ struct route: remove an unused field, move close to each
  other some fields that might likely go away in the future
2004-04-04 06:14:55 +00:00
Jonathan Lemon
1cafed3941 Update netisr handling; Each SWI now registers its queue, and all queue
drain routines are done by swi_net, which allows for better queue control
at some future point.  Packets may also be directly dispatched to a netisr
instead of queued, this may be of interest at some installations, but
currently defaults to off.

Reviewed by: hsu, silby, jayanth, sam
Sponsored by: DARPA, NAI Labs
2003-03-04 23:19:55 +00:00
Bruce Evans
c1cd65bae8 Fixed some style bugs in the removal of __P(()). Continuation lines
were not outdented to preserve non-KNF lining up of code with parentheses.
Switch to KNF formatting.
2002-03-24 10:19:10 +00:00
Alfred Perlstein
4d77a549fe Remove __P. 2002-03-19 21:25:46 +00:00
Max Khon
322dcb8d3d bring in ARP support for variable length link level addresses
Reviewed by:	jdp
Approved by:	jdp
Obtained from:	NetBSD
MFC after:	6 weeks
2001-10-14 20:17:53 +00:00
Peter Wemm
664a31e496 Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL"
is an application space macro and the applications are supposed to be free
to use it as they please (but cannot).  This is consistant with the other
BSD's who made this change quite some time ago.  More commits to come.
1999-12-29 04:46:21 +00:00
Yoshinobu Inoue
76429de41a KAME related header files additions and merges.
(only those which don't affect c source files so much)

Reviewed by: cvs-committers
Obtained from: KAME project
1999-11-05 14:41:39 +00:00
Peter Wemm
c3aac50f28 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
Eivind Eklund
1d5e9e2255 Make INET a proper option.
This will not make any of object files that LINT create change; there
might be differences with INET disabled, but hardly anything compiled
before without INET anyway.  Now the 'obvious' things will give a
proper error if compiled without inet - ipx_ip, ipfw, tcp_debug.  The
only thing that _should_ work (but can't be made to compile reasonably
easily) is sppp :-(

This commit move struct arpcom from <netinet/if_ether.h> to
<net/if_arp.h>.
1998-01-08 23:42:31 +00:00
Peter Wemm
6875d25465 Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not
ready for it yet.
1997-02-22 09:48:43 +00:00
Jordan K. Hubbard
1130b656e5 Make the long-awaited change from $Id$ to $FreeBSD$
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore.  This update would have been
insane otherwise.
1997-01-14 07:20:47 +00:00
Garrett Wollman
477180fbc8 Use the new if_multiaddrs list for multicast addresses rather than the
previous hackery involving struct in_ifaddr and arpcom.  Get rid of the
abominable multi_kludge.  Update all network interfaces to use the
new machanism.  Distressingly few Ethernet drivers program the multicast
filter properly (assuming the hardware has one, which it usually does).
1997-01-13 21:26:53 +00:00
Garrett Wollman
9cb3aff230 Move the ethertypes from <netinet/if_ether.h> to <net/ethernet.h>.
Many programs need the numbers but don't need the internals of ARP.

More commits to follow...
1997-01-03 19:51:54 +00:00
Garrett Wollman
4963f4cd96 Include <net/if_arp.h> in the one header that requires it,
<netinet/if_ether.h>, rather than in <net/if.h>, most of whose callers
have no need of it.

Pointed-out-by:	bde
1996-12-11 17:46:33 +00:00
Poul-Henning Kamp
26a8b0bf7e Megacommit to straigthen out ETHER_ mess.
I'm pretty convinced after looking at this that the majority of our
drivers are confused about the in/exclusion of ETHER_CRC_LEN :-(
1996-08-06 21:14:36 +00:00
Bill Fenner
203f0c075f Send ARP's for aliased subnets with the proper source address.
Get rid of ac->ac_ipaddr and arpwhohas() since they assume that
an interface has only one address.

Obtained from:	BSD/OS 2.1, via Rich Stevens <rstevens@noao.edu>
1996-03-23 01:32:30 +00:00
Poul-Henning Kamp
885f1aa42b Remove old ballast, clean up a little bit, staticize.
Add five sysctl variables that you should probably never tweak.
	net.arp.t_prune: 300
	net.arp.t_keep: 1200
	net.arp.t_down: 20
	net.arp.maxtries: 5
	net.arp.useloopback: 1
	net.arp.proxyall: 0

(It's net.arp because arp isn't limited to inet, though our present
implementation surely is).
1995-12-09 16:06:54 +00:00
David Greenman
4a5f1499b0 all:
Removed ifnet.if_init and ifnet.if_reset as they are generally unused.
Change the parameter passed to if_watchdog to be a ifnet * rather than
a unit number. All of this is an attempt to move toward not needing an
array of softc pointers (which is usually static in size) to point to
the driver softc.

if_ed.c:
Changed some of the argument passing to some functions to make a little
more sense.

if_ep.c, if_vx.c:
Killed completely bogus use of if_timer. It was being set in such a way
that the interface was being reset once per second (blech!).
1995-12-05 02:01:59 +00:00
Garrett Wollman
66800f5742 Convert ARP to use queue.h macros rather than insque/remque. While
we're at it, eliminate obsolete exposure of `struct llinfo_arp' to
the world.  (This dates back to when ARP entries were not stored in
the routing table, and there was no other way for the `arp' program
to read the whole table than to grovel around in /dev/kmem.)
1995-10-05 20:08:43 +00:00
Garrett Wollman
ef91e5283e Merge with 4.4-Lite-2. This involves changing the version number and
moving a declaration around.

Obtained from:	4.4BSD-Lite-2
1995-09-21 17:39:51 +00:00
Rodney W. Grimes
9b2e535452 Remove trailing whitespace. 1995-05-30 08:16:23 +00:00
Bill Paul
5f6d32c735 Add declaration for struct ether_addr (this is where Sun documents
it to go).
1995-04-02 01:26:26 +00:00
Garrett Wollman
b2774d00ad Make arp_rtrequest() static since nobody needs to referene it any more. 1994-12-22 22:00:30 +00:00
Garrett Wollman
dd2e410221 Move ARP interface initialization into if_ether.c:arp_ifinit(). 1994-12-22 21:56:22 +00:00
Garrett Wollman
5df7296441 Fix a bug which caused panics when attempting to change just the flags of
a route.  (This still doesn't work, but it doesn't panic now.)  It looks
like there may be a number of incipient bugs in this code.

Also, get ready for the time when all IP gateway routes are cloning, which
is necessary to keep proper TCP statistics.
1994-10-11 23:16:38 +00:00
Paul Richards
707f139edb Made idempotent.
Submitted by:	Paul
1994-08-21 05:27:42 +00:00
Garrett Wollman
f23b4c91c4 Fix up some sloppy coding practices:
- Delete redundant declarations.
- Add -Wredundant-declarations to Makefile.i386 so they don't come back.
- Delete sloppy COMMON-style declarations of uninitialized data in
  header files.
- Add a few prototypes.
- Clean up warnings resulting from the above.

NB: ioconf.c will still generate a redundant-declaration warning, which
is unavoidable unless somebody volunteers to make `config' smarter.
1994-08-18 22:36:09 +00:00
David Greenman
3c4dd3568f Added $Id$ 1994-08-02 07:55:43 +00:00
Rodney W. Grimes
df8bae1de4 BSD 4.4 Lite Kernel Sources 1994-05-24 10:09:53 +00:00