Commit Graph

37 Commits

Author SHA1 Message Date
Gleb Smirnoff
dc2f4d7f5f Utilize callout_pending() macro 2005-01-11 12:20:28 +00:00
Warner Losh
c398230b64 /* -> /*- for license, minor formatting changes 2005-01-07 01:45:51 +00:00
Gleb Smirnoff
089323f30d Use ng_callout() and ng_uncallout() instead of home-grown
implementation.

Tested by:	Savchuk Taras
Reviewed by:	archie
Approved by:	julian (mentor)
2004-12-09 07:49:02 +00:00
Gleb Smirnoff
0306463aa0 Increase PPTP_MAX_TIMEOUT up to 3 seconds. 10 prooved too much for high packet
loss links, and 1 second appeared to be too small for high latency links.

If we will receive more complaints, we should make this parameter configurable.

PR:		kern/69536
Approved by:	archie, julian (mentor)
MFC after:	3 days
2004-09-06 19:53:58 +00:00
Julian Elischer
f8aae7776f Switch to using C99 sparse initialisers for the type methods array.
Should make no binary difference.

Submitted by:	Gleb Smirnoff <glebius@cell.sick.ru>
Reviewed by:	Harti Brandt <harti@freebsd.org>
MFC after:	1 week
2004-05-29 00:51:19 +00:00
Archie Cobbs
922ee196d9 Add 'enableWindowing' configuration knob to the ng_pptpgre(4) netgraph node.
Submitted by:	Michael Bretterklieber <mbretter@a-quadrat.at>
MFC after:	2 weeks
2004-04-26 14:26:54 +00:00
Archie Cobbs
f6a1906569 Lower the maximum ACK timeout for GRE packets from 10 to 1 second.
In practice it seems that in situations of high packet loss the ACK
timeout seems to hit this maximum (perhaps inappropriately, but the
estimation algorithm is not perfect, so apparently it happens). In
any case, 10 seconds is way too high a value so lower to 1 second.

MFC after:	3 days
2003-11-18 20:43:23 +00:00
Dag-Erling Smørgrav
f7854568f5 Don't use ovbcopy(). 2003-04-04 12:12:34 +00:00
Warner Losh
a163d034fa Back out M_* changes, per decision of the TRB.
Approved by: trb
2003-02-19 05:47:46 +00:00
Alfred Perlstein
44956c9863 Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.
Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.
2003-01-21 08:56:16 +00:00
Bosko Milekic
86fea6be59 o Untangle the confusion with the malloc flags {M_WAITOK, M_NOWAIT} and
the mbuf allocator flags {M_TRYWAIT, M_DONTWAIT}.
o Fix a bpf_compat issue where malloc() was defined to just call
  bpf_alloc() and pass the 'canwait' flag(s) along.  It's been changed
  to call bpf_alloc() but pass the corresponding M_TRYWAIT or M_DONTWAIT
  flag (and only one of those two).

Submitted by: Hiten Pandya <hiten@unixdaemons.com> (hiten->commit_count++)
2002-12-19 22:58:27 +00:00
Archie Cobbs
cc78c48a68 Relax checking of incoming PPTP GRE packets a bit: ignore a bogus payload
length field when there's no payload indicated by the header 'S' bit.
This works around semi-brokenness in the Mac OS X PPTP client.
2002-09-14 00:00:49 +00:00
Archie Cobbs
816b834f14 Const'ify variables to make it clear we're not writing to the mbuf data.
Reviewed by:	julian, brian
MFC after:	1 week
2002-06-05 23:35:31 +00:00
Archie Cobbs
f0184ff8e3 Fix GCC warnings caused by initializing a zero length array. In the process,
simply things a bit by getting rid of 'struct ng_parse_struct_info' which
was useless because it only contained one field.

MFC after:	2 weeks
2002-05-31 23:48:03 +00:00
Archie Cobbs
4a48abb26a Use 'struct callout' instead of 'struct callout_handle' to avoid
exhausting the kernel timeout table. Perform the usual gymnastics to
avoid race conditions between node shutdown and timeouts occurring.

Also fix a bug in handling ack delays < PPTP_MIN_ACK_DELAY. Before,
we were ack'ing immediately. Instead, just impose a minimum ack delay
time, like the name of the macro implies.

MFC after:	1 week
2002-04-14 17:37:35 +00:00
David E. O'Brien
6e551fb628 Update to C99, s/__FUNCTION__/__func__/,
also don't use ANSI string concatenation.
2001-12-10 08:09:49 +00:00
Archie Cobbs
422c727634 Don't reference a node after we dropped a reference to it
(same as in previous checkin, but in a different function).
2001-04-11 22:04:47 +00:00
Julian Elischer
5951069a87 netgraph.h:
Change a prototype.
  Add a function version of ng_ref_node() when debugging so
  a breakpoint can be set on it.
ng_base.c:
  add 'node' as an argument to ng_apply_item so that it is up
  to the caller to take over and release the item's reference on
  the node. If the release reports back that the node went away
  due to the reference going to 0, the caller should cease referencing
  the now defunct node. (e.g. the item was a 'kill node' message).
  Alter ng_unref_node to report back the residual references as a result.
ng_pptpgre.c:
  Don't reference a node after we dropped a reference to it.
  (What if it was the last?)
Fixes a node leak reported by Harti Brandt <brandt@fokus.gmd.de>
 which was due to an incorrect earlier attempt to fix the
 "accessing node after dropping the last reference" problem.
2001-03-10 16:31:00 +00:00
Archie Cobbs
22dfb9bdb7 Fix potential crash caused by packets with bogus ACK's.
Reported by:	Fabien THOMAS <fabient@netasq.com>
2001-03-08 20:10:02 +00:00
Julian Elischer
30400f03aa Part 2 of the netgraph rewrite.
This is mostly cosmetic changes, (though I caught a bug or two while
makeing them)
Reviewed by:	archie@freebsd.org
2001-01-08 05:34:06 +00:00
Julian Elischer
069154d55f Rewrite of netgraph to start getting ready for SMP.
This version is functional and is aproaching solid..
notice I said APROACHING. There are many node types I cannot test
I have tested: echo hole ppp socket vjc iface tee bpf async tty
The rest compile and "Look" right.  More changes to follow.
DEBUGGING is enabled in this code to help if people have problems.
2001-01-06 00:46:47 +00:00
Julian Elischer
589f6ed8ce Divorce the kernel binary ABI version number from the message
format version number. (userland programs should not need to be
recompiled when the netgraph kernel internal ABI is changed.

Also fix modules that don;t handle the fact that a caller may not supply
a return message pointer. (benign at the moment because the calling code
checks, but that will change)
2000-12-18 20:03:32 +00:00
Julian Elischer
859a4d166c Reviewed by: Archie@freebsd.org
This clears out my outstanding netgraph changes.
There is a netgraph change of design in the offing and this is to some
extent a superset of soem of the new functionality and some of the old
functionality that may be removed.

This code works as before, but allows some new features that I want to
work with and evaluate. It is the basis for a version of netgraph
with integral locking for SMP use.

This is running on my test machine with no new problems :-)
2000-12-12 18:52:14 +00:00
David Malone
99cdf4ccb2 Add the use of M_ZERO to netgraph.
Submitted by:	josh@zipperup.org
Submitted by:	Robert Drehmel <robd@gmx.net>
Submitted by:	archie
Approved by:	archie
2000-11-18 15:17:43 +00:00
Julian Elischer
cc3bbd68c5 Since neither archie nor I work at Whistle any more, change our email
addresses to be the more usefu @freebsd.org ones
so we can keep getting bug-reports.
- man pages to follow..
2000-10-24 17:32:45 +00:00
Archie Cobbs
034d9dac34 Calling untimeout(9) leads to a race window where memory could be leaked.
Close this window by simply not calling untimeout(9).
2000-10-11 20:29:12 +00:00
Archie Cobbs
ee79f58e34 Remove unnecessary #include's as reported by phk's script. 2000-09-22 16:51:14 +00:00
Archie Cobbs
65b9a0da90 Allocate all memory (including within node constructors) with M_NOWAIT
instead of M_WAITOK, to allow for maximum flexibility.
2000-09-21 18:01:23 +00:00
Archie Cobbs
da010626df Followup to previous commit..
- It's worthwhile to use untimeout(9), even though we must still protect
  against "false" timeouts, because most of the time it saves having to
  handle a dummy timeout event.
- Slight tweaks to the delayed ACK algorithm paramters.
2000-07-25 18:57:20 +00:00
Archie Cobbs
678f9e335e Several fixes:
- Fix slowness when operating over fast connections, where the timeout(9)
  granularity is on the same order of magnitude as the round trip time.
  timeout(9) can happen up to 1 tick early, which was causing receive
  ack timeouts to happen too early, causing bogus "lost" packets.
- Increase the local time counter to 64 bits to avoid roll-over.
- Keep statistics on memory allocation failures.
- Add a new option to always include the ack when sending data packets.
  Might be useful in high packet loss situations. Might not.
2000-07-25 00:23:19 +00:00
Archie Cobbs
e962a82308 Fix incorrectly implemented receive ACK timeout algorithm:
instead of bumping the recvAck counter by one, pretend that
all outstanding xmit packets are acknowleged, and restart
transmitting anew, with an empty (but halved) transmit window.

Put a lower bound on the adaptive timeout value.
2000-06-28 19:43:34 +00:00
Archie Cobbs
3cd7db2297 - Start sequence numbers at zero instead of one; the rest of the
world seems to interpret the spec this way
- Initialize transmit window to two instead of one; helps get things
  going initially when the first packet may get dropped
- Really fix the shutdown + timeout race condition this time
2000-06-26 19:43:24 +00:00
Archie Cobbs
9bee7adfa8 Fix a couple of bugs:
- Properly handle 32 bit sequence numbers when they wrap around
- Don't drop GRE packets with stale ACK numbers, just ignore the ACK
- Close race between node being shutdown and timer going off
Also add support for lots of statistics, and control message ASCIIfication
2000-05-05 01:11:39 +00:00
Julian Elischer
a4ec03cfa8 Two simple changes to the kernel internal API for netgraph modules,
to support future work in flow-control and 'packet reject/replace'
processing modes.

reviewed by: phk, archie
2000-04-28 17:09:00 +00:00
Poul-Henning Kamp
3389ae9350 Remove ~25 unneeded #include <sys/conf.h>
Remove ~60 unneeded #include <sys/malloc.h>
2000-04-19 14:58:28 +00:00
Archie Cobbs
4164c44770 Fix race condition caused by missing splnet()'s. 2000-01-04 22:06:08 +00:00
Archie Cobbs
add85a1d6e New netgraph node type 'pptpgre': this performs GRE encapsulation
for the PPTP protocol as specified in RFC 2637.
1999-12-08 18:55:39 +00:00