Commit Graph

105 Commits

Author SHA1 Message Date
Michael Tuexen
d9ba240c1c Limit the user-controllable amount of memory the kernel allocates
via IPPROTO_SCTP level socket options.

This issue was found by running syzkaller.

MFC after:	1 week
2019-01-16 11:33:47 +00:00
Michael Tuexen
1a0b021677 Refactor the SHUTDOWN_PENDING state handling.
This is not a functional change but a preperation for the upcoming
DTrace support. It is necessary to change the state in one
logical operation, even if it involves clearing the sub state
SHUTDOWN_PENDING.

MFC after:		1 month
2018-08-21 13:25:32 +00:00
Michael Tuexen
839d21d62e Use the stacb instead of the asoc in state macros.
This is not a functional change. Just a preparation for upcoming
dtrace state change provider support.
2018-08-13 13:58:45 +00:00
Michael Tuexen
cf6339882e Add constant for the PAD chunk as defined in RFC 4820.
This will be used by traceroute and traceroute6 soon.

MFC after:	1 week
2018-01-27 13:46:55 +00:00
Michael Tuexen
07e75d0a37 Update references in comments, since the IDs have become an RFC long
time ago. Also cleanup whitespaces. No functional change.

MFC after:	1 week
2018-01-27 13:43:03 +00:00
Pedro F. Giffuni
51369649b0 sys: further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.
2017-11-20 19:43:44 +00:00
Michael Tuexen
8c8e10b763 Code cleanup, not functional change.
This avoids taking a pointer of a packed structure which allows simpler
compilation of the userland stack.

MFC after:	1 week
2017-10-14 10:02:59 +00:00
Michael Tuexen
cdd2d7d4a5 Code cleanup, no functional change.
MFC after:	1 week
2017-09-21 11:56:31 +00:00
Michael Tuexen
fe40f49bb3 Remove code not used on any platform currently supported.
MFC after:	1 week
2017-09-16 21:26:06 +00:00
Michael Tuexen
1a7abbb3be Use a longer buffer for messages in ERROR chunks.
This allows them to be sent in a non truncated way and addresses a warning
given by newver versions of gcc.
Thanks to Anselm Jonas Scholl for reporting it and providing a patch.
2017-06-23 09:27:31 +00:00
Michael Tuexen
49656eefc8 Cleanup the names of SSN, SID, TSN, FSN, PPID and MID.
This made a couple of bugs visible in handling SSN wrap-arounds
when using DATA chunks. Now bulk transfer seems to work fine...
This fixes the issue reported in
https://github.com/sctplab/usrsctp/issues/111

MFC after:	1 week
2016-12-07 19:30:59 +00:00
Michael Tuexen
8e1b295f09 Fix the PR-SCTP behaviour.
This is done by rrs@.

MFC after:	3 days
2016-07-17 13:14:51 +00:00
Pedro F. Giffuni
cd0a4ff6a5 netinet/sctp*: minor spelling fixes in comments.
No functional change.

Reviewed by:	tuexen
2016-05-02 20:56:11 +00:00
Randall Stewart
44249214d3 This is work done by Michael Tuexen and myself at the IETF. This
adds the new I-Data (Interleaved Data) message. This allows a user
to be able to have complete freedom from Head Of Line blocking that
was previously there due to the in-ability to send multiple large
messages without the TSN's being in sequence. The code as been
tested with Michaels various packet drill scripts as well as
inter-networking between the IETF's location in Argentina and Germany.
2016-04-07 09:10:34 +00:00
Michael Tuexen
9a8e308861 Improve compilation on windows 64-bit (for the userland stack).
MFC after:	1 week
2016-03-27 10:04:25 +00:00
Michael Tuexen
e51963a7bb Loopback addresses are 127.0.0.0/8, not 127.0.0.1/32.
MFC after: 1 week
2016-02-11 22:29:39 +00:00
Michael Tuexen
e629b9fc56 Ensure that ERROR chunks are always padded by implementing this
in the routine, which queues an ERROR chunk, instead on relyinh
on the callers to do so. Since one caller missed this, this actially
fixes a bug.

MFC after:	1 week
2015-09-11 13:54:33 +00:00
Michael Tuexen
2e2d67945a Use 5 times RTO.Max as the default for the shutdown guard timer
as required by RFC 4960. The sysctl variable can be used to
overwrite this.

Discussed with:	rrs
MFC after:	1 week
2015-08-29 17:26:29 +00:00
Michael Tuexen
e92c2a8d6a Fix the exporting of SCTP association states to userland. Without this,
associations in SHUTDOWN-PENDING were never reported correctly.

MFC after:	3 weeks
2015-08-29 09:14:32 +00:00
Michael Tuexen
b7d130befc Fix and cleanup the debug information. This has no user-visible changes.
Thanks to Irene Ruengeler for proving a patch.

MFC after: 3 days
2015-05-28 16:00:23 +00:00
Michael Tuexen
f47f328dc5 Fix the handling of sysctl variables when used with VIMAGE.
While there do some cleanup of the code.

MFC after: 1 week
2014-09-06 19:12:14 +00:00
Michael Tuexen
fe96e2852e Use SCTP_OVER_UDP_TUNNELING_PORT more consistently.
MFC after: 3 days
2014-03-29 20:21:36 +00:00
Michael Tuexen
ff1ffd7499 * Provide information in error causes in ASCII instead of
proprietary binary format.
* Add support for a diagnostic information error cause.
  The code is sysctlable and the default is 0, which
  means it is not sent.

This is joint work with rrs@.

MFC after: 1 week
2014-03-16 12:32:16 +00:00
Michael Tuexen
77dabf96d9 Remove a buggy comparision when setting manually the path MTU.
After fixing, the comparision would have become redundant.
Thanks to Andrew Galante for reporting the issue.

MFC after:	3 days
2013-10-15 20:21:27 +00:00
Michael Tuexen
ee1ccd9258 Fix a bug were only 2048 streams where usable even though more than
2048 streams were negotiated on the wire. While there, remove the
hard coded limit of 2048 streams.

MFC after: 3 days
2013-07-05 10:08:49 +00:00
Michael Tuexen
ebae998767 Add a macro for checking for IPv4 link local addresses.
MFC after: 1 week
2013-03-31 18:27:46 +00:00
Michael Tuexen
325c8c46b1 Get the accounting working. We now have counters how many
chunks for each SCTP outgoing stream are in the send and
sent queue.
While there, improve the naming of NR-SACK related constants
recently introduced.

MFC after: 1 week
2012-11-16 19:39:10 +00:00
Michael Tuexen
98f2956c11 Improve PR-SCTP if used in combination with NR-SACK.
Based on work done by Mohammad Rajiullah.

MFC after: 1 week
2012-11-07 20:59:00 +00:00
Michael Tuexen
807aad636f Use consistent text at the begining of the files.
MFC after: 3 days
2012-05-23 11:26:28 +00:00
Michael Tuexen
635b6ff793 Use a default for max_burst of 4 and l2var of 2.
This was discussed with rrs@.

MFC after: 3 days
2012-05-17 18:12:24 +00:00
Michael Tuexen
389b1b118c Support SCTP_REMOTE_ERROR notification.
MFC after: 3 days
2012-05-13 22:27:54 +00:00
Michael Tuexen
1edc9dbae5 Provide in the SCTP_SEND_FAILED and SCTP_SEND_FAILED_EVENT notifications
the correct ssf_error or ssfe_error as required by RFC 6458.

MFC after: 3 days
2012-05-13 19:32:49 +00:00
Michael Tuexen
b342faf4bf Remove unused constants.
MFC after: 3 days
2012-05-13 17:17:13 +00:00
Michael Tuexen
410a3b1ef0 Use ECONNABORTED in cases where the ABORT was sent to the peer.
MFC after: 3 days
2012-05-13 16:56:16 +00:00
Michael Tuexen
d426064666 Provide the flags in the SCTP stream reconfig related notification
as specified in RFC 6525.

MFC after: 3 days
2012-05-05 21:41:16 +00:00
Randall Stewart
c4e848b770 Make stream our stream reset implementation
compliant to RFC6525.

MFC after:	1 month
2012-03-29 13:36:53 +00:00
Michael Tuexen
60990c0c06 Address issues found by clang. While there, fix also some style
issues.

MFC after: 3 months.
2011-12-27 10:16:24 +00:00
Michael Tuexen
7215cc1b74 Fix unused parameter warnings.
While there, fix some whitespace issues.

MFC after: 3 months.
2011-12-17 19:21:40 +00:00
Michael Tuexen
972478a4c0 Fix a bug reported by Irene Ruengeler which resulted in not sending
out HEARTBEATs when requested by the user. The HEARTBEATs were only
queued, but not actually sent out.

MFC after: 2 months.
2011-12-10 10:52:54 +00:00
Michael Tuexen
80c79bbe7a Fix the enabling/disabling of Heartbeats and path MTU
discovery when using the SCTP_PEER_ADDR_PARAMS socket option.
Approved by: re
MFC after: 1 month.
2011-09-17 08:50:29 +00:00
Michael Tuexen
ca85e9482a The result of a joint work between rrs@ and myself at the IETF:
* Decouple the path supervision using a separate HB timer per path.
* Add support for potentially failed state.
* Bring back RTO.min to 1 second.
* Accept packets on IP-addresses already announced via an ASCONF
* While there: do some cleanups.

Approved by: re@
MFC after: 2 months.
2011-08-03 20:21:00 +00:00
Randall Stewart
f79aab1866 Tunes and fixes the new DC-CC to seem to hit the
right mix.  Still may need some tweaks but it
appears to almost not give away too much to an
RFC2581 flow, but can really minimize the amount of
buffers used in the net.

MFC after:	3 months
2011-03-08 11:58:25 +00:00
Randall Stewart
48b6c64938 Adds a new Congestion Control that helps reduce
the RTT that a flow will build up in buffers in
transit. It is a slight modification to RFC2581
but is more friendly i.e. less aggressive.

MFC after:	3 months
2011-03-01 00:37:46 +00:00
Randall Stewart
5d40cf5d23 1) Typo correction in comments and one spacing change.
2) Mass update to all copyrights.
MFC after:	3 Months
2011-02-05 12:12:51 +00:00
Randall Stewart
dec0177df6 1) Move per John Baldwin to mp_maxid
2) Some signed/unsigned errors found by Mac OS compiler (from Michael)
3) a couple of copyright updates on the effected files.

MFC after:	3 months
2011-02-03 19:22:21 +00:00
Randall Stewart
bfc46083b9 Adds an experimental option to create a pool of
threads. These serve as input threads and are queued
packets based on the V-tag number. This is similar to
what a modern card can do with queue's for TCP... but
alas modern cards know nothing about SCTP.

MFC after:	3 months (maybe)
2011-02-03 10:05:30 +00:00
Randall Stewart
899288ae4b 1) Allow a chunk to track the cwnd it was at when sent.
2) Add separate max-bursts for retransmit and hb. These
   are set to sysctlable values but not settable via the
   socket api. This makes sure we don't blast out HB's or
   fast-retransmits.
3) Determine on the first data transmission on a net if
   its local-lan (by being under or over a RTT). This
   can later be used to think about different algorithms
   based on locallan vs big-i (experimental)
4) The cwnd should NOT be allowed to grow when an ECNEcho
   is seen (TCP has this same bug). We fix this in SCTP
   so an ECNe being seen prevents an advance of cwnd.
5) CWR's should not be sent multiple times to the
   same network, instead just updating the TSN being
   transmitted if needed.

MFC after:	1 Month
2011-02-02 11:13:23 +00:00
Randall Stewart
493d8e5a83 More ECN fixes:
1) We now remove ECN-Nonce since it will no longer continue as a I-D
2) Eliminate last_tsn_echo, this tied us to an assoc not the net
   and thus we were not doing m-homing on the ECN-Echo senders side right.
3) Increment the count going out even if the TSN in lower in the pending
   ECN-Echo, this way the receiver knows exactly how many packets were
   marked even with network re-ordering
4) Fix so we DO NOT stop doing delayed sack if a ECN Echo is in queue
MFC after:	1 month
2011-01-31 11:50:11 +00:00
Michael Tuexen
f8cdf87663 * Use 300 ms as the default for RTO_MIN.
* Disable burst mitigation by default.
* Remove unused constant.
Discussed with rrs.
MFC after: 3 months.
2011-01-26 21:38:17 +00:00
Randall Stewart
a97009a5cd Fix it so we align with new socket API draft for
state's in destination (i.e. ACTIVE/INACTIVE/UNCONFIRMED)

MFC after:	1 week
2011-01-20 12:40:09 +00:00