Commit Graph

65 Commits

Author SHA1 Message Date
Andre Oppermann
22cafcf0b8 - Fill in the correct rtm_index for RTM_ADD and RTM_CHANGE messages.
- Allow RTM_CHANGE to change a number of route flags as specified by
  RTF_FMASK.

- The unused rtm_use field in struct rt_msghdr is redesignated as
  rtm_fmask field to communicate route flag changes in RTM_CHANGE
  messages from userland.  The use count of a route was moved to
  rtm_rmx a long time ago.  For source code compatibility reasons
  a define of rtm_use to rtm_fmask is provided.

These changes faciliate running of multiple cooperating routing
daemons at the same time without causing undesired interference.
Open[BGP|OSPF]D make use of these features to have IGP routes
override EGP ones.

Obtained from:	OpenBSD (claudio@)
MFC after:	3 days
2006-03-15 19:39:09 +00:00
Andre Oppermann
17a8471fcd Remove bogous semicolons at the end of the definitions of
'do { ... } while (0)' macros.

PR:		kern/83088
Sumbitted by:	<antoine.brodin at laposte.net>
2005-09-14 14:57:04 +00:00
Warner Losh
c398230b64 /* -> /*- for license, minor formatting changes 2005-01-07 01:45:51 +00:00
Sam Leffler
b83a279f19 Add 802.11-specific events that are dispatched through the routing socket.
This really doesn't belong here but is preferred (for the moment) over
adding yet another mechanism for sending msgs from the kernel to user apps.

Reviewed by:	imp
2004-10-05 19:48:33 +00:00
Alexander Kabaev
445e045b0d Avoid casts as lvalues. 2004-07-28 06:59:55 +00:00
Luigi Rizzo
3916ebe8f0 document the locking behaviour of the functions that access
the routing table.
2004-04-24 23:34:04 +00:00
Luigi Rizzo
f76d5670c0 Document an assumption on the structure of 'struct rtentry' 2004-04-20 07:03:30 +00:00
Luigi Rizzo
2eb5613fe6 make route_init() static 2004-04-17 15:10:20 +00:00
Luigi Rizzo
e74642df71 route.h: introduce a macro, SA_SIZE(struct sockaddr *) which returns
the space occupied by a struct sockaddr when passed through a
routing socket.
Use it to replace the macro ROUNDUP(int), that does the same but
is redefined by every file which uses it, courtesy of
the School of Cut'n'Paste Programming(TM).

(partial) userland changes to follow.
2004-04-13 11:22:22 +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
Andre Oppermann
97d8d152c2 Introduce tcp_hostcache and remove the tcp specific metrics from
the routing table.  Move all usage and references in the tcp stack
from the routing table metrics to the tcp hostcache.

It caches measured parameters of past tcp sessions to provide better
initial start values for following connections from or to the same
source or destination.  Depending on the network parameters to/from
the remote host this can lead to significant speedups for new tcp
connections after the first one because they inherit and shortcut
the learning curve.

tcp_hostcache is designed for multiple concurrent access in SMP
environments with high contention and is hash indexed by remote
ip address.

It removes significant locking requirements from the tcp stack with
regard to the routing table.

Reviewed by:	sam (mentor), bms
Reviewed by:	-net, -current, core@kame.net (IPv6 parts)
Approved by:	re (scottl)
2003-11-20 20:07:39 +00:00
Andre Oppermann
26d02ca7ba Remove RTF_PRCLONING from routing table and adjust users of it
accordingly.  The define is left intact for ABI compatibility
with userland.

This is a pre-step for the introduction of tcp_hostcache.  The
network stack remains fully useable with this change.

Reviewed by:	sam (mentor), bms
Reviewed by:	-net, -current, core@kame.net (IPv6 parts)
Approved by:	re (scottl)
2003-11-20 19:47:31 +00:00
Sam Leffler
7138d65c3f replace explicit changes to rt_refcnt by RT_ADDREF and RT_REMREF
macros that expand to include assertions when the system is built
with INVARIANTS

Supported by:	FreeBSD Foundation
2003-11-08 23:36:32 +00:00
Sam Leffler
9c63e9dbd7 Overhaul routing table entry cleanup by introducing a new rtexpunge
routine that takes a locked routing table reference and removes all
references to the entry in the various data structures. This
eliminates instances of recursive locking and also closes races
where the lock on the entry had to be dropped prior to calling
rtrequest(RTM_DELETE).  This also cleans up confusion where the
caller held a reference to an entry that might have been reclaimed
(and in some cases used that reference).

Supported by:	FreeBSD Foundation
2003-10-30 23:02:51 +00:00
Sam Leffler
d1dd20be6e Locking for updates to routing table entries. Each rtentry gets a mutex
that covers updates to the contents.  Note this is separate from holding
a reference and/or locking the routing table itself.

Other/related changes:

o rtredirect loses the final parameter by which an rtentry reference
  may be returned; this was never used and added unwarranted complexity
  for locking.
o minor style cleanups to routing code (e.g. ansi-fy function decls)
o remove the logic to bump the refcnt on the parent of cloned routes,
  we assume the parent will remain as long as the clone; doing this avoids
  a circularity in locking during delete
o convert some timeouts to MPSAFE callouts

Notes:

1. rt_mtx in struct rtentry is guarded by #ifdef _KERNEL as user-level
   applications cannot/do-no know about mutex's.  Doing this requires
   that the mutex be the last element in the structure.  A better solution
   is to introduce an externalized version of struct rtentry but this is
   a major task because of the intertwining of rtentry and other data
   structures that are visible to user applications.
2. There are known LOR's that are expected to go away with forthcoming
   work to eliminate many held references.  If not these will be resolved
   prior to release.
3. ATM changes are untested.

Sponsored by:	FreeBSD Foundation
Obtained from:	BSD/OS (partly)
2003-10-04 03:44:50 +00:00
Sam Leffler
becc44d76c cleanups prior to adding locking (and in some cases to eliminate locking):
o move route_cb to be private to rtsock.c
o replace global static route_proto by locals
o eliminate global #define shorthands for info references
o remove some register decls
o ansi-fy function decls
o move items to be close in scope to their usage
o add rt_dispatch function for dispatching the actual message
o cleanup tangled logic for doing all-but-me msg send

Support by:	FreeBSD Foundation
2003-10-03 18:15:54 +00:00
Jeffrey Hsu
1ebe998675 Add mutex for routing entries.
Reviewed by:	bmilekic, silby
2003-07-19 00:21:13 +00:00
Peter Wemm
3c6b084e96 Finish driving a stake through the heart of netns and the associated
ifdefs scattered around the place - its dead Jim!

The SMB stuff had stolen AF_NS, make it official.
2003-03-05 19:24:24 +00:00
Matthew N. Dodd
7f760c4890 Reduce code duplication. This adds the function rt_check() to route.c.
Approved by:	 sam (in principle)
2003-03-02 21:34:37 +00:00
Bruce Evans
34fe62c776 Fixed some style bugs in the removal of __P(()). The main ones were
not removing tabs before "__P((", and not outdenting continuation lines
to preserve non-KNF lining up of code with parentheses.  Switch to KNF
formatting and/or rewrap the whole prototype in some cases.
2002-03-24 09:34:04 +00:00
Alfred Perlstein
929ddbbb89 Remove __P. 2002-03-19 21:54:18 +00:00
Ruslan Ermilov
7b6edd044b Introduce an interface announcement message for the routing
socket so that routing daemons and other interested parties
know when an interface is attached/detached.

PR:		kern/33747
Obtained from:	NetBSD
MFC after:	2 weeks
2002-01-18 14:33:04 +00:00
Jonathan Lemon
be2ac88c59 Introduce a syncache, which enables FreeBSD to withstand a SYN flood
DoS in an improved fashion over the existing code.

Reviewed by: silby  (in a previous iteration)
Sponsored by: DARPA, NAI Labs
2001-11-22 04:50:44 +00:00
Ruslan Ermilov
8071913df2 Pull post-4.4BSD change to sys/net/route.c from BSD/OS 4.2.
Have sys/net/route.c:rtrequest1(), which takes ``rt_addrinfo *''
as the argument.  Pass rt_addrinfo all the way down to rtrequest1
and ifa->ifa_rtrequest.  3rd argument of ifa->ifa_rtrequest is now
``rt_addrinfo *'' instead of ``sockaddr *'' (almost noone is
using it anyways).

Benefit: the following command now works.  Previously we needed
two route(8) invocations, "add" then "change".
# route add -inet6 default ::1 -ifp gif0

Remove unsafe typecast in rtrequest(), from ``rtentry *'' to
``sockaddr *''.  It was introduced by 4.3BSD-Reno and never
corrected.

Obtained from:	BSD/OS, NetBSD
MFC after:	1 month
PR:		kern/28360
2001-10-17 18:07:05 +00:00
Ruslan Ermilov
4862bf8c0d 64-bit fixes from CSRG. 2001-10-17 11:10:55 +00:00
Julian Elischer
b40ce4165d KSE Milestone 2
Note ALL MODULES MUST BE RECOMPILED
make the kernel aware that there are smaller units of scheduling than the
process. (but only allow one thread per process at this time).
This is functionally equivalent to teh previousl -current except
that there is a thread associated with each process.

Sorry john! (your next MFC will be a doosie!)

Reviewed by: peter@freebsd.org, dillon@freebsd.org

X-MFC after:    ha ha ha ha
2001-09-12 08:38:13 +00:00
Bill Fenner
c3cb7e5d7a Don't bother passing p to rtioctl just so it can fail to pass it to mrt_ioctl 2001-07-25 20:15:28 +00:00
Jayanth Vijayaraghavan
e7f3269307 When a connection is being dropped due to a listen queue overflow,
delete the cloned route that is associated with the connection.
This does not exhaust the routing table memory when the system
is under a SYN flood attack. The route entry is not deleted if there
is any prior information cached in it.

Reviewed by: Peter Wemm,asmodai
2000-07-21 23:26:37 +00:00
Peter Wemm
242c5536ea Clean up some loose ends in the network code, including the X.25 and ISO
#ifdefs.  Clean out unused netisr's and leftover netisr linker set gunk.
Tested on x86 and alpha, including world.

Approved by:	jkh
2000-02-13 03:32:07 +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
ae5bcbff16 rtcalloc() is removed because it turned out not to be necessary for FreeBSD.
(It was added as a part of KAME patch)

Specified by: jdp@polstra.com
1999-12-09 08:56:50 +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
Ruslan Ermilov
97998e86db Add comments, fix typos.
Reviewed by:	wollman
1999-09-14 00:33:23 +00:00
Peter Wemm
c3aac50f28 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
Mike Smith
64e41ba7c8 Increase the size of the route reference count from 15 bits to 31 bits.
This doesn't change the size or alignment of the structure on either i386
or Alpha, and thus should be binary-compatible (modulo problems with old
applications and routes with more than 2^15 references).

Reviewed by:	peter
1999-06-30 23:11:15 +00:00
Peter Wemm
dfd5dee1b0 Add sufficient braces to keep egcs happy about potentially ambiguous
if/else nesting.
1999-05-06 18:13:11 +00:00
Bruce Evans
bd7ac1b26b Added a forward struct declaration so that this file is less
self-insufficient.
1998-03-23 13:58:02 +00:00
Bruce Evans
bea0f0be7b Some staticized variables were still declared to be extern. 1997-09-07 05:27:26 +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
6303c69c89 Get rid of obsolete RTF_MASK and RTF_CHAINDELETE flags. 1996-10-09 18:35:10 +00:00
Julian Elischer
8a15e7f475 change a comment to match what the BSD4.4 book says. 1996-08-26 22:04:47 +00:00
Garrett Wollman
9f9b3dc4ae Add three new route flags to help determine what sort of address
the destination represents.  For IP:

- Iff it is a host route, RTF_LOCAL and RTF_BROADCAST indicate local
  (belongs to this host) and broadcast addresses, respectively.

- For all routes, RTF_MULTICAST is set if the destination is multicast.

The RTF_BROADCAST flag is used by ip_output() to eliminate a call to
in_broadcast() in a common case; this gives about 1% in our packet-generation
experiments.  All three flags might be used (although they aren't now)
to determine whether a packet can be forwarded; a given host route can
represent a forwardable address if:

	(rt->rt_flags & (RTF_HOST | RTF_LOCAL | RTF_BROADCAST | RTF_MULTICAST))
	== RTF_HOST

Obviously, one still has to do all the work if a host route is not present,
but this code allows one to cache the results of such a lookup if rtalloc1()
is called without masking RTF_PRCLONING.
1996-05-06 17:42:13 +00:00
Mike Pritchard
6c5e9bbdf5 Fix a bunch of spelling errors in the comment fields of
a bunch of system include files.
1996-01-30 23:02:38 +00:00
Poul-Henning Kamp
f708ef1b9e Another mega commit to staticize things. 1995-12-14 09:55:16 +00:00
Poul-Henning Kamp
5204129576 All net.* sysctl converted now. 1995-11-16 19:00:27 +00:00
Julian Elischer
cc6a66f20e Reviewed by: julian and jhay@mikom.csir.co.za
Submitted by:	Mike Mitchell, supervisor@alb.asctmd.com

This is a bulk mport of Mike's IPX/SPX protocol stacks and all the
related gunf that goes with it..
it is not guaranteed to work 100% correctly at this time
but as we had several people trying to work on it
I figured it would be better to get it checked in so
they could all get teh same thing to work on..

Mikes been using it for a year or so
but on 2.0

more changes and stuff will be merged in from other developers now that this is in.

Mike Mitchell, Network Engineer
AMTECH Systems Corporation, Technology and Manufacturing
8600 Jefferson Street, Albuquerque, New Mexico 87113 (505) 856-8000
supervisor@alb.asctmd.com
1995-10-26 20:31:59 +00:00
Garrett Wollman
3ba6426d14 Change signature of rt->rt_output() so that it is compatible with
ifp->if_output() functions.  This way, initial implementations of
rt_output functionality can just lazily use if_output until customized
versions are written.
1995-10-16 20:53:55 +00:00