Commit Graph

20 Commits

Author SHA1 Message Date
Paul Traina
7b40aa327d Make the misnamed tcp initial keepalive timer value (which is really the
time, in seconds, that state for non-established TCP sessions stays about)
a sysctl modifyable variable.

[part 1 of two commits, I just realized I can't play with the indices as
 I was typing this commit message.]
1996-09-13 23:51:44 +00:00
David Greenman
af7a299930 Fixed two bugs in previous commit: be sure to include tcp_debug.h when
TCPDEBUG is defined, and fix typo in TCPDEBUG2() macro.
1996-07-12 17:28:47 +00:00
Garrett Wollman
2c37256e5a Modify the kernel to use the new pr_usrreqs interface rather than the old
pr_usrreq mechanism which was poorly designed and error-prone.  This
commit renames pr_usrreq to pr_ousrreq so that old code which depended on it
would break in an obvious manner.  This commit also implements the new
interface for TCP, although the old function is left as an example
(#ifdef'ed out).  This commit ALSO fixes a longstanding bug in the
TCP timer processing (introduced by davidg on 1995/04/12) which caused
timer processing on a TCB to always stop after a single timer had
expired (because it misinterpreted the return value from tcp_usrreq()
to indicate that the TCB had been deleted).  Finally, some code
related to polling has been deleted from if.c because it is not
relevant t -current and doesn't look at all like my current code.
1996-07-11 16:32:50 +00:00
John Polstra
588c92252f Fix a bug in the handling of the "persist" state which, under certain
circumstances, caused perfectly good connections to be dropped.  This
happened for connections over a LAN, where the retransmit timer
calculation TCP_REXMTVAL(tp) returned 0.  If sending was blocked by flow
control for long enough, the old code dropped the connection, even
though timely replies were being received for all window probes.

Reviewed by:	W. Richard Stevens <rstevens@noao.edu>
1996-06-03 15:37:52 +00:00
David Greenman
2d8266af5c Two fixes from Rich Stevens:
1) Set the persist timer to help time-out connections in the CLOSING state.
2) Honor the keep-alive timer in the CLOSING state.

   This fixes problems with connections getting "stuck" due to incompletion
of the final connection shutdown which can be a BIG problem on busy WWW
servers.
1996-04-15 03:46:33 +00:00
Poul-Henning Kamp
34be9bf3ce Add a sysctl (net.inet.tcp.always_keepalive: 0) that when set will force
keepalive on all tcp sessions.  Setsockopt(2) cannot override this setting.
Maybe another one is needed that just changes the default for SO_KEEPALIVE ?
Requested by: Joe Greco <jgreco@brasil.moneng.mei.com>
1996-04-04 11:17:04 +00:00
David Greenman
2ee45d7d28 Move or add #include <queue.h> in preparation for upcoming struct socket
changes.
1996-03-11 15:13:58 +00:00
Andras Olah
74b48c1de1 Reverse the modification which caused the annoying m_copydata crash: set
the TF_ACKNOW flag when the REXMT timer goes off to force a
retransmission.  In certain situations pulling snd_nxt back to snd_una
is not sufficient.
1996-01-04 21:34:21 +00:00
Poul-Henning Kamp
0312fbe97d New style sysctl & staticize alot of stuff. 1995-11-14 20:34:56 +00:00
Poul-Henning Kamp
98163b98dc Start adding new style sysctl here too. 1995-11-09 20:23:09 +00:00
Andras Olah
356ad1b0cb Setting the TF_ACKNOW flag was redundant in the REXMT timeout because
tcp_output() checks for the condition snd_nxt == snd_una.

Reviewed by:	davidg, wollman, olah
Suggested by:	Richard Stevens
1995-11-03 22:19:50 +00:00
Garrett Wollman
e79adb8ed6 Finish 4.4-Lite-2 merge: randomize TCP initial sequence numbers
to make ISS-guessing spoofing attacks harder.
1995-10-03 16:54:17 +00:00
David Greenman
cc0964fb2b Add connection drop capability for persist timeouts.
Reviewed by:	Andras Olah
Obtained from:	4.4BSD-lite2 via W. Richard Stevens
1995-07-29 18:48:44 +00:00
Rodney W. Grimes
9b2e535452 Remove trailing whitespace. 1995-05-30 08:16:23 +00:00
David Greenman
230620627b Fixed bug I introduced when changing PCB list to use 4.4BSD style queue
macros. Basically, detect 'tp' going away differently.
1995-04-12 06:49:56 +00:00
David Greenman
15bd2b4385 Implemented PCB hashing. Includes new functions in_pcbinshash, in_pcbrehash,
and in_pcblookuphash.
1995-04-09 01:29:31 +00:00
Garrett Wollman
41f82abe5a Transaction TCP support now standard. Hack away! 1995-02-16 00:55:44 +00:00
Garrett Wollman
a0292f2375 Merge Transaction TCP, courtesy of Andras Olah <olah@cs.utwente.nl> and
Bob Braden <braden@isi.edu>.

NB: This has not had David's TCP ACK hack re-integrated.  It is not clear
what the correct solution to this problem is, if any.  If a better solution
doesn't pop up in response to this message, I'll put David's code back in
(or he's welcome to do so himself).
1995-02-09 23:13:27 +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