Commit Graph

62 Commits

Author SHA1 Message Date
thorpej 882dec6ba3 Test callout_pending(), not callout_active(), and eliminate now-unnecessary
callout_deactivate() calls.
2003-02-03 23:50:59 +00:00
scw 5521093d4b Quell an uninitialised variable warning. 2002-11-24 10:52:47 +00:00
simonb 4dd4549b31 Guard use of "so" in tcp_timer_persist() and tcp_timer_2msl() with
#ifdef TCP_DEBUG.
2002-10-22 03:11:03 +00:00
itojun f192b66b94 whitespace 2002-06-09 16:33:36 +00:00
itojun 3e7ae517e0 path MTU discovery blackhole detection.
PR 12790 (sorry for not committing it for a long time)
2002-05-26 16:05:43 +00:00
lukem ea1cd7eb08 add RCSIDs 2001-11-13 00:32:34 +00:00
matt 47577dca93 Change a few variable/tables to const since they are read-only. 2001-11-04 13:42:27 +00:00
thorpej 050e9de009 Use callouts for SYN cache timers, rather than traversing time queues
in tcp_slowtimo().
2001-09-11 21:03:20 +00:00
thorpej 4745c7f252 Update copyrights. 2001-09-10 22:45:46 +00:00
thorpej 6d0e813f6c Use callouts for TCP timers, rather than traversing the list of
all open TCP connections in tcp_slowtimo() (which is called 2x
per second).  It's fairly rare for TCP timers to actually fire,
so saving this list traversal is good, especially if you want
to scale to thousands of open connections.
2001-09-10 22:14:26 +00:00
thorpej 413e5cb878 Initialize TCP timer variables in a new function, tcp_timer_init(). 2001-09-10 20:36:43 +00:00
thorpej 45e02f5ee8 Split tcp_timers() into multiple functions, one for each timer,
and call it directly from tcp_slowtimo() (via a table) rather
than going through tcp_userreq().

This will allow us to call TCP timers directly from callouts,
in a future revision.
2001-09-10 20:15:14 +00:00
thorpej 7446fd2bc8 Change the way receive idle time and round trip time are measured.
Instead of incrementing t_idle and t_rtt in tcp_slowtimo(), we now
take a timstamp (via tcp_now) and use subtraction to compute the
delta when we actually need it (using unsigned arithmetic so that
tcp_now wrapping is handled correctly).

Based on similar changes in FreeBSD.
2001-09-10 15:23:09 +00:00
thorpej 783db90019 Use a callout for the delayed ACK timer, and delete tcp_fasttimo().
Expose the delayed ACK timer as net.inet.tcp.delack_ticks.
2001-09-10 04:24:24 +00:00
itojun 9183e2dc4e remove #ifdef TCP6. it is not likely for us to bring in sys/netinet6/tcp6*.c
(separate TCP/IPv6 stack) into netbsd-current.
2000-10-19 20:22:59 +00:00
itojun a7e15e4935 be more friendly with INET-less build.
XXX we need to do more to do a working INET-less build
2000-10-17 03:06:42 +00:00
augustss 8529438fe6 Remove register declarations. 2000-03-30 12:51:13 +00:00
itojun 685747d56c Use proper ip protocol # field and tcp hdr on sending RST against SYN,
when ip header and tcp header are not adjacent to each other
(i.e. when ip6 options are attached).

To test this, try
	telnet @::1@::1 port
toward a port without responding server.  Prior to the fix, the kernel will
generate broken RST packet.
1999-07-14 22:37:13 +00:00
itojun 118d2b1d4f IPv6 kernel code, based on KAME/NetBSD 1.4, SNAP kit 19990628.
(Sorry for a big commit, I can't separate this into several pieces...)
Pls check sys/netinet6/TODO and sys/netinet6/IMPLEMENTATION for details.

- sys/kern: do not assume single mbuf, accept chained mbuf on passing
  data from userland to kernel (or other way round).
- "midway" ATM card: ATM PVC pseudo device support, like those done in ALTQ
  package (ftp://ftp.csl.sony.co.jp/pub/kjc/).
- sys/netinet/tcp*: IPv4/v6 dual stack tcp support.
- sys/netinet/{ip6,icmp6}.h, sys/net/pfkeyv2.h: IETF document assumes those
  file to be there so we patch it up.
- sys/netinet: IPsec additions are here and there.
- sys/netinet6/*: most of IPv6 code sits here.
- sys/netkey: IPsec key management code
- dev/pci/pcidevs: regen

In my understanding no code here is subject to export control so it
should be safe.
1999-07-01 08:12:45 +00:00
mouse b95116821c Create tcp.keepidle, tcp.keepintvl, tcp.keepcnt, tcp.slowhz sysctls. 1998-09-10 10:46:03 +00:00
mycroft 2f501074f8 Fix a couple of bogons related to tcp_new_iss():
* Don't add tcp_iss_seq when creating a new ISS from TIME-WAIT state.
* Do the clock increment even when using the rnd device.
1998-09-04 22:29:54 +00:00
thorpej 1c4ff0a086 Comment where we use the Loss Window. 1998-07-17 22:18:49 +00:00
thorpej c296923d2f Loss window MUST be one segment, per draft-floyd-incr-init-win-03. 1998-06-02 17:22:26 +00:00
thorpej 49573284f5 Make sure a timer is marked "disarmed" once it has expired. 1998-05-11 20:52:18 +00:00
thorpej 5596fe2614 Nuke TUBA per my note to tech-net; there's no reason to keep it around. 1998-05-11 19:57:23 +00:00
thorpej dc49b0342e Define all TCP timers in terms of PRT timers. 1998-05-07 01:30:46 +00:00
thorpej 1ffa60ac01 Use macros from tcp_timer.h to manipulate TCP timers, so that their
implementation can be changed easily.
1998-05-06 01:21:20 +00:00
kml e173e7a084 Remove bogus black hole discovery code 1998-05-01 01:15:55 +00:00
thorpej 13f972a4d6 Make use of the work-arounds for ancient broken TCP peers run-time
conditional (tcp_compat_42).  The kernel config option TCP_COMPAT_42
will still enable this by default, or disable this by default if the
option is not included (i.e. current behavior).  This will be made a
sysctl soon.
1998-04-29 05:16:46 +00:00
kml 1579dcec47 Add support for deletion of routes added by path MTU discovery;
uses new generic route timeout code.  Add sysctl for timeout period.
1998-04-29 03:44:11 +00:00
thorpej 2da6c91259 Fix a potential-congestion case in the larger initial congestion window
code, as clarified in the TCPIMPL WG meeting at IETF #41: If the SYN
(active open) or SYN,ACK (passive open) was retransmitted, the initial
congestion window for the first slow start of that connection must be
one segment.
1998-03-31 22:49:09 +00:00
kml 123232e156 Fix a retransmission bug introduced by the Brakmo and Peterson
RTO estimation changes.  Under some circumstances it would return a value
of 0, while the old Van Jacobson RTO code would return a minimum of 3.
This would result in 12 retransmissions, each 1 second apart.
This takes care of those instances, and ensures that t_rttmin is
used everywhere as a lower bound.
1998-03-19 22:29:33 +00:00
thorpej 5837cc6b07 Update copyright (sigh, should have done this long ago). 1998-02-19 02:36:42 +00:00
scottr 3cdcd5e1c7 Use option header file for TCP_COMPAT_42 1998-01-12 03:00:42 +00:00
thorpej e5e283e02d Finishing merging 4.4BSD-Lite2 netinet. At this point, the only changes
left were SCCS IDs and Copyright dates.
1998-01-05 10:31:44 +00:00
thorpej 673fb149c6 Implement a queue for delayed ACK processing. This queue is used in
tcp_fasttimo() in lieu of scanning all open TCP connections.
1997-12-31 03:31:23 +00:00
thorpej 04ec3df592 From 4.4BSD-Lite2:
- When running the slow timers, skip PCBs in LISTEN state.
- When processing the persist timer, drop the connection if the connection
  idle time exceeds the maximum backoff for retransmit.  Part of
  kern/2335 (pete@daemon.net).
1997-12-17 06:04:17 +00:00
thorpej c02a72fcd0 Implement an infrastructure to allow larger initial congestion windows.
The sysctl'able variable "tcp_init_win", when set to 0, selects an
auto-tuning algorithm for selecting the initial window, based on transmit
segment size, per discussion in the IETF tcpimpl working group.

Default initial window is still 1 segment, but will soon become 2 segments,
per discussion in tcpimpl.
1997-12-11 22:47:24 +00:00
thorpej 7f7bb7db17 In tcp_fasttimo(), don't clear TF_DELACK; we need it to count delayed ACKs
in tcp_output(), and it will only be cleared in tcp_output() if the ACK was
transmitted sucessfully.  Also, don't count delayed ACKs here, let tcp_output()
count them.
1997-12-11 06:42:44 +00:00
thorpej eae709d885 Costmetic change: use intotcpcb() in tcp_fasttimo(). 1997-12-09 21:59:17 +00:00
kml 86275dc497 TCP MSS fixes to provide cleaner slow-start and recovery. 1997-11-08 02:35:22 +00:00
explorer 80513cb5ae o Make usage of /dev/random dependant on
pseudo-device   rnd                     # /dev/random and in-kernel generator
  in config files.

o Add declaration to all architectures.

o Clean up copyright message in rnd.c, rnd.h, and rndpool.c to include
  that this code is derived in part from Ted Tyso's linux code.
1997-10-13 00:46:08 +00:00
explorer 790e114732 Add hooks to use the kernel random system to generate TCP sequence numbers. 1997-10-10 01:51:07 +00:00
thorpej 402ae96361 Garbage-collect some "extern"s. 1997-07-28 22:07:38 +00:00
thorpej efa8881dbe Pull SYN_cache_branch down into the main line. 1997-07-23 21:26:40 +00:00
mycroft 315bb1ab50 Fix RTT scaling problems introduced with Brakmo and Peterson changes. 1996-12-10 18:20:19 +00:00
mycroft 62a6cce9ca Add in_nullhost() and in_hosteq() macros, to hide some protocol
details.  Also, fix a bug in TCP wrt SYN+URG packets.
1996-09-09 14:51:07 +00:00
mycroft 49d52c9b1c Pass a proc pointer down to the usrreq and pcbbind functions for PRU_ATTACH, PRU_BIND and
PRU_CONTROL.  The usrreq interface really needs to be split up, but this will have to wait.
Remove SS_PRIV completely.
1996-05-22 13:54:55 +00:00
christos 14d9cd33af netinet prototypes 1996-02-13 23:40:59 +00:00
mycroft 5482957905 splnet --> splsoftnet 1995-08-12 23:59:09 +00:00