Commit Graph

215 Commits

Author SHA1 Message Date
Michael Tuexen
e187bac213 Don't use anonymous unions. 2016-04-18 06:38:53 +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
ed65436366 Add const to several constants. Thanks to Nicholas Nethercote for
providing the patch via
https://bugzilla.mozilla.org/show_bug.cgi?id=1255655

MFC after:	1 week
2016-03-23 13:28:04 +00:00
Michael Tuexen
fe4a59b30a Stop processing of a SACK when the association has been aborted.
MFC after: 3 days
2015-12-21 18:52:02 +00:00
Michael Tuexen
d96bef9c77 Ensure that outgoing streams get reset when they run dry.
MFC after:	1 week
2015-12-03 15:19:29 +00:00
Michael Tuexen
0bfc52bea5 Use the correct length. The wrong one was too large.
MFC after: 3 days
2015-11-06 22:08:05 +00:00
Michael Tuexen
b70b526d17 Fix typos in field names of struct sctp_extrcvinfo.
Provide defines to allow applications to compile.
Thanks to Jens Hoelscher for making me aware of the typos.

MFC after: 1 week
2015-11-06 13:08:16 +00:00
Michael Tuexen
86eda749af Cleanup the handling of error causes for ERROR chunks. This fixes
an inconsistency of the padding handling. The final padding is
now considered to be a chunk padding.

MFC after:	1 week
2015-09-12 17:08:51 +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
e7e71dd7f3 Don't take the port numbers for packets containing ABORT chunks from
a freed mbuf. Just use them from the stcb.

MFC after: 3 days
2015-08-02 16:07:30 +00:00
Michael Tuexen
9ae56375af Fix a typo reported by Erik Cederstrand.
MFC after: 	1 week
2015-07-28 08:50:13 +00:00
Michael Tuexen
267dbe63a1 Provide consistent error causes whenever an ABORT chunk is sent.
MFC after:	1 week
2015-07-27 22:35:54 +00:00
Michael Tuexen
cf9e47b2f0 Improve locking on Mac OS X. This does not change the functionality
on FreeBSD.

Reviewed by:	rrs
MFC after:	1 week
2015-07-26 10:37:40 +00:00
Michael Tuexen
6247db3541 Fix and improve a debug message. The SID was reported as an SSN.
MFC after:	1 week
2015-07-26 10:17:17 +00:00
Randall Stewart
7cca17758c Fix several problems with Stream Reset.
1) We were not handling (or sending) the IN_PROGRESS case if
    the other side (or our side) was not able to reset (awaiting more data).
 2) We would improperly send a stream-reset when we should not. Not
    waiting until the TSN had been assigned when data was inqueue.

Reviewed by:	tuexen
2015-07-22 11:30:37 +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
548f47a8f1 Address some compiler warnings. No functional change.
MFC after: 3 days
2015-05-28 14:24:21 +00:00
Michael Tuexen
55f8a4bb1b Don't panic under INVARIANTS when receiving a SACK which cumacks
a TSN never sent.
While there, fix two typos.

MFC after: 1 week
2015-04-26 21:47:15 +00:00
Michael Tuexen
8427b3fd4f Fix the bug in the handling of fragmented abandoned SCTP user messages reported in
https://code.google.com/p/sctp-refimpl/issues/detail?id=11
Thanks to Lally Singh for reporting it.
MFC after: 3 days
2015-03-24 15:05:36 +00:00
Michael Tuexen
4be807c4d6 Minimize the usage of SCTP_BUF_IS_EXTENDED.
This should help Robert...
2015-01-10 20:49:57 +00:00
Michael Tuexen
457b4b8836 This is the SCTP specific companion of
https://svnweb.freebsd.org/changeset/base/275358
which was provided by Hans Petter Selasky.
2014-12-04 21:17:50 +00:00
Michael Tuexen
4e88d37a2a Do the renaming of sb_cc to sb_ccc in a way with less code changes by
using a macro.
This is an alternate approach to
https://svnweb.freebsd.org/changeset/base/275326
which is easier to handle upstream.

Discussed with: rrs, glebius
2014-12-02 20:29:29 +00:00
Gleb Smirnoff
0f9d0a73a4 Merge from projects/sendfile:
o Introduce a notion of "not ready" mbufs in socket buffers.  These
mbufs are now being populated by some I/O in background and are
referenced outside.  This forces following implications:
- An mbuf which is "not ready" can't be taken out of the buffer.
- An mbuf that is behind a "not ready" in the queue neither.
- If sockbet buffer is flushed, then "not ready" mbufs shouln't be
  freed.

o In struct sockbuf the sb_cc field is split into sb_ccc and sb_acc.
  The sb_ccc stands for ""claimed character count", or "committed
  character count".  And the sb_acc is "available character count".
  Consumers of socket buffer API shouldn't already access them directly,
  but use sbused() and sbavail() respectively.
o Not ready mbufs are marked with M_NOTREADY, and ready but blocked ones
  with M_BLOCKED.
o New field sb_fnrdy points to the first not ready mbuf, to avoid linear
  search.
o New function sbready() is provided to activate certain amount of mbufs
  in a socket buffer.

A special note on SCTP:
  SCTP has its own sockbufs.  Unfortunately, FreeBSD stack doesn't yet
allow protocol specific sockbufs.  Thus, SCTP does some hacks to make
itself compatible with FreeBSD: it manages sockbufs on its own, but keeps
sb_cc updated to inform the stack of amount of data in them.  The new
notion of "not ready" data isn't supported by SCTP.  Instead, only a
mechanical substitute is done: s/sb_cc/sb_ccc/.
  A proper solution would be to take away struct sockbuf from struct
socket and allow protocols to implement their own socket buffers, like
SCTP already does.  This was discussed with rrs@.

Sponsored by:	Netflix
Sponsored by:	Nginx, Inc.
2014-11-30 12:52:33 +00:00
Michael Tuexen
dd973b0e15 Add support for the SCTP_PR_SUPPORTED socket option as specified in
http://tools.ietf.org/html/draft-ietf-tsvwg-sctp-prpolicies
Add also a sysctl controlling the default of the end-points.

MFC after: 1 week
2014-08-02 21:36:40 +00:00
Michael Tuexen
ce11b8429b Cleanup sctp_send_initiate() and sctp_send_initiate_ack() to be
in sync as much as possible. This simplifies upcoming changes.
2014-08-01 12:42:37 +00:00
Xin LI
e432298ade Initialize SCTP cmsg's and notification's buffer before copying out
to userland.

Submitted by:	tuexen
Security:	CVE-2014-3953
Security:	FreeBSD-SA-14:17.kmem
2014-07-08 21:54:27 +00:00
Michael Tuexen
8be0fd55dc Don't free an mbuf twice. This only happens in very rare error
cases where the peer sends illegal sequencing information in
DATA chunks for an existing association.

MFC after: 3 days.
2014-04-23 21:20:55 +00:00
Michael Tuexen
eb67ee5fc6 Add consistency checks to ensure that fragments of a user message
have the same U-bit.

MFC after: 3 days
2014-04-20 21:11:39 +00:00
Michael Tuexen
2dec1efc5a Use consistently debug output instead of an unconditional printf.
MFC after: 3 days
2014-04-19 20:55:51 +00:00
Michael Tuexen
32451da416 Send the correct error cause, when a DATA chunk with no user data
is received. This bug was reported by Irene Ruengeler.

MFC after: 3 days
2014-04-19 19:21:06 +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
04194e4f7d Remove a stray write operation.
MFC after: 3 days
2013-11-16 16:09:09 +00:00
Michael Tuexen
d4d23375d3 When computing the partial delivery point, take the
receiver socket buffer size correctly into account.

MFC after: 1 week
2013-09-07 00:45:24 +00:00
Michael Tuexen
0ddb429900 Remove redundant field pr_sctp_on.
MFC after: 1 week
2013-09-03 19:31:59 +00:00
Michael Tuexen
2c9c61defa Make the features a 64-bit value instead of 32-bit.
This will allow an easier integration of the support
for NDATA.
While there, do also some minor cleanups.
Obtained from:	rrs@
MFC after: 2 weeks
2013-08-12 13:52:15 +00:00
Michael Tuexen
56f778aadf Code cleanups.
MFC after: 3 days
2013-07-03 18:48:43 +00:00
Michael Tuexen
c53f854a17 Don't send kernel provided information in the User Initiated
ABORT cause, since the user can also provide this kind of
information. So the receiver doesn't know who provided the
information.
While there: Fix a bug where the stack would send a malformed
ABORT chunk when using a send() call with SCTP_ABORT|SCT_SENDALL
flags.

MFC after: 3 days
2013-02-11 13:57:03 +00:00
Michael Tuexen
c39cfa1f7e Fix a bug where HEARTBEATs were still sent in SHUTDOWN_SENT or
SHUTDOWN_ACK_SENT state. While there, make the corresponding
code consistent.

MFC after: 1 week
2013-02-09 08:27:08 +00:00
Gleb Smirnoff
eb1b1807af Mechanically substitute flags from historic mbuf allocator with
malloc(9) flags within sys.

Exceptions:

- sys/contrib not touched
- sys/mbuf.h edited manually
2012-12-05 08:04:20 +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
a7ad6026e0 Add per outgoing stream accounting for chunks in the send
and sent queue. This provides no functional change, but is
a preparation for an upcoming stream reset improvement.
Done with rrs@.

MFC after: 1 week
2012-11-07 22:11:38 +00:00
Michael Tuexen
2a4985847a Add some missing changes missed in the last commit.
MFC after: 1 week
X-MFC with: 242708
2012-11-07 21:25:32 +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
a169d6ec2b Don't include a structure containing a flexible array in another
structure.

MFC after:	10 days
2012-09-07 13:36:42 +00:00
Michael Tuexen
dd294dcec6 Using %p in a format string requires a void *.
MFC after: 10 days
2012-09-05 18:52:01 +00:00
Michael Tuexen
b1754ad17b Pass the src and dst address of a received packet explicitly around.
MFC after: 3 days
2012-06-28 16:01:08 +00:00
Michael Tuexen
39803b8c58 Whitespace cleanup.
MFC after: 3 days
2012-06-25 17:15:09 +00:00
Michael Tuexen
20cc2188f3 Pass the packet length explicitly around.
MFC after: 3 days
2012-06-24 23:12:24 +00:00
Michael Tuexen
f30ac43257 Pass flowid explicitly through the stack instead of taking it from
the mbuf chain at different places.
While there: Fix several bugs related to VRFs.

MFC after: 3 days
2012-06-14 06:54:48 +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
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
4b1f78e1af Provide the error code in SCTP_PEER_ADDR_CHANGE notifications as
specified in RFC 6458.

MFC after: 3 days
2012-05-13 17:36:04 +00:00
Michael Tuexen
a2b42326b5 Provide in the association change notification the received ABORT chunk
if case of SCTP_COMM_LOST or SCTP_CANT_STR_ASSOC as required by RFC 6458.

MFC after: 3 days
2012-05-12 20:11:35 +00:00
Michael Tuexen
cd3fd53188 Use SCTP_PRINTF() instead of printf() in all SCTP sources.
MFC after: 3 days
2012-05-04 09:27:00 +00:00
Michael Tuexen
921569e288 Fix a bug where we copy out more data from a mbuf chain that are
actually in it. This happens when SCTP receives an unknown chunk, which
requires the sending of an ERROR chunk, and there is no final padding but
the chunk is not 4-byte aligned.
Reported by yueting via rwatson@

MFC after: 3 days
2012-04-19 12:43:19 +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
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
Michael Tuexen
e2e7c62edc Add support for the newly added SCTP API.
In particular add support for:
* SCTP_SNDINFO, SCTP_PRINFO, SCTP_AUTHINFO, SCTP_DSTADDRV4, and
  SCTP_DSTADDRV6 cmsgs.
* SCTP_NXTINFO and SCTP_RCVINFO cmgs.
* SCTP_EVENT, SCTP_RECVRCVINFO, SCTP_RECVNXTINFO and SCTP_DEFAULT_SNDINFO
  socket option.
* Special association ids (SCTP_FUTURE_ASSOC, ...)
* sctp_recvv() and sctp_sendv() functions.

MFC after: 1 month.
2011-06-15 23:50:27 +00:00
Michael Tuexen
14cfa970bf Get rid of unused functions.
MFC after: 1 week.
2011-05-29 18:41:06 +00:00
Michael Tuexen
689e6a5fa3 Fix a locking issue showing up on Mac OS X when subscribing to
authentication events. DTLS/SCTP renegotiations trigger the bug.

MFC after: 2 weeks.
2011-05-08 09:11:59 +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
299108c5a2 Improvements to CC modules:
1) Add four new points that allow you to get more information
   to cc algo's
2) Fix the case where user changes module on a existing TCB, in
   such a case, the initialization module needs to be called on all nets.
3) Move htcp_cc structure to a union that other modules can use.
4) Add 5th point for get/set socket options for cc_module specific options

MFC after:	2 months
2011-02-26 15:23:46 +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
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
Randall Stewart
a21779f050 Fixes to ECN in SCTP.
1) ECN was on an association basis, this is incorrect and
   will not work with CMT or for that matter if the user
   is sending to multiple addresses. This commit makes
   ECN on a per path basis.
2) Adopt the new format for the ECN internet draft. This also
   maintains compatability with old format chunks as well.
3) Keep track of the real time of a RTT down to micro seconds.
   For some future conditional features (for like a data center
   this is good information to have).
MFC after:	1 month
2011-01-29 19:55:29 +00:00
Michael Tuexen
20b07a4d85 Define and use SCTP_SSN_GE, SCTP_SSN_GT, SCTP_TSN_GE, SCTP_TSN_GT macros
and use them instead of the generic compare_with_wrap.
Retire compare_with_wrap.

MFC after: 3 months.
2010-12-30 21:32:35 +00:00
Michael Tuexen
4a9ef3f833 Code cleanup: Use LIST_FOREACH, LIST_FOREACH_SAFE, TAILQ_FOREACH,
TAILQ_FOREACH_SAFE where appropriate.
No functional change.

MFC after: 3 months.
2010-12-30 16:56:20 +00:00
Michael Tuexen
7c99d56fdf Improve plausibility check in sctp_handle_sack().
Allow cmt_on_off to support values 0 (no CMT), 1 (CMT), and 2 (CMT/RP).

MFC after: 3 months.
2010-12-22 17:59:38 +00:00
Michael Tuexen
8f777478ff Bugfix: Take also the nr-mapping array into account when detecting
gaps.

Reviewed by: rrs@
MFC after: 3 days.
2010-12-16 21:01:02 +00:00
Michael Tuexen
36ec9f814d Add a missing cast. Reported by blade_ly at yahoo.com.cn.
MFC after: 1 day.
2010-12-16 09:49:16 +00:00
Michael Tuexen
d9c5cfea61 Fix a bug where also the number of non-renegable gap reports
was considered to be potentially renegable.

MFC after: 1 day.
2010-12-04 19:29:49 +00:00
Michael Tuexen
12af6654a3 Not only stop all timers when entering the SHUTDOWN_SENT state,
but also when entering the SHUTDOWN_ACK_SEND state.

MFC after: 3 days.
2010-11-07 14:39:40 +00:00
Michael Tuexen
1ea735c802 Fix a locking issue which resulted in aborted associations
due to a corrupted nr-mapping array.

MFC after: 2 weeks.
2010-09-20 12:19:11 +00:00
Michael Tuexen
99ddc825f3 Fix a bug where the wrong PR-SCTP policy was considered.
While there, use always the same code for the check of
TTL expiration.

MFC after: 2 weeks.
2010-09-17 19:20:39 +00:00
Michael Tuexen
24f52bbd9b Use TAILQ_EMPTY() for testing if a tail queue is empty.
Set whoFrom to NULL after freeing whoFrom.
2010-09-15 21:53:10 +00:00
Michael Tuexen
20083c2eb1 Fix the switching on/off of CMT using sysctl and socket option.
Fix the switching on/off of PF and NR-SACKs using sysctl.
Add minor improvement in handling malloc failures.
Improve the address checks when sending.

MFC after: 4 weeks
2010-08-28 17:59:51 +00:00
Randall Stewart
44fbe46280 PR SCTP Bugs. Basically a full sized frame of
PR SCTP FWD-TSN's would not be sent and thus
cause a stalled connection. Also the rwnd
Calculation was also off on the receiver side for
PR-SCTP.
MFC after:	1 month
2010-07-29 11:37:04 +00:00
Randall Stewart
8dcde5165e BUG:Turns out we need to use both bit maps
to calculate the cum-ack (we were not doing
it for the NR-Sack case). With this fix
NR-sack should now work correctly.
MFC after:	1 week
2010-06-09 16:39:18 +00:00
Randall Stewart
9b2e0767e2 2 Bugs:
1) Only use both mapping arrays when NR sack is off. This
   way we can hold off moving the cumack (not the best but
   workable) when NR-sack is on.

2) We must make sure to just return on the move of the
   bit to the NR array if the cum-ack as already went
   past the TSN. This prevents marking a bit behind the
   array and hitting the invariant code that panic's us.

MFC after:	1 week
2010-06-08 03:39:31 +00:00
Randall Stewart
66bd30bd4f This fixes a BUG in the handling of the cum-ack calculation.
We were only paying attention to the nr-mapping-array. Which
seems to make sense on the surface, by definition things
up to the cum-ack should be deliverable thus in the nr-mapping-array.
However (there is always a gotcha) thats not true when it
comes to large messages. The stack may hold the message
while re-assembling it not not deliver it based on several
thresholds. If that happens (which it would for smaller
large messages) then the cum-ack is figured wrong. We
now properly use both arrays in the cum-ack calculation.

MFC after:	1 week.
2010-06-07 18:29:10 +00:00
Randall Stewart
791437b51c Use the proper increment macro when increasing the
number on sent_queue_retran_cnt.

MFC after:	1 week
2010-06-05 21:22:58 +00:00
Randall Stewart
83128708b4 More PR-SCTP bugs:
- Make sure that when you kick the streams you add correctly
    using a 16 bit unsigned.
  - Make sure when sending out you allow FWD-TSN to skip over
    and list the ACKED chunks in the stream/seq list (so the
    rcv will kick the stream)
MFC after:	3 days
2010-05-12 18:00:15 +00:00
Michael Tuexen
091430c121 Get rid of unused constants.
MFC after: 3 days.
2010-05-12 16:10:33 +00:00
Randall Stewart
7898f4085c This fixes PR-SCTP issues:
- Slide the map at the proper place.
 - Mark the bits in the nr_array ONLY if there
   is no marking.
 - When generating a FWD-TSN we allow us to skip past
   ACKED chunks too.

MFC after:	1 weeks
2010-05-12 13:45:46 +00:00
Michael Tuexen
475d0674a6 Undo my lastest fix since that wasn't one at all.
MFC after: 3 days.
2010-04-25 15:04:57 +00:00
Michael Tuexen
f31e6c7f26 * Fix compilation when using SCTP_AUDITING_ENABLED.
* Fix delaying of SACK by taking out old optimization code
  which does not optimize anymore.
* Fix fast retransmission of chunks abandoned by the
  "number of retransmissions" policy.

MFC after: 3 days.
2010-04-23 08:19:47 +00:00
Michael Tuexen
ee94f0a272 Update highest_tsn variables when sliding mapping arrays. 2010-04-20 08:51:21 +00:00
Michael Tuexen
307b49efef Get delayed SACK working again.
MFC after: 3 days.
2010-04-19 14:15:58 +00:00
Michael Tuexen
37f144eb5d Fix a bug where SACKs are not sent when they should.
Move some protection code to INVARIANTS.
Cleanups.

MFC after: 3 days.
2010-04-17 12:22:44 +00:00
Michael Tuexen
aed5947cd0 Fix a off-by-one bug in zeroing out the mapping arrays.
Fix sctp_print_mapping_array().

MFC after: 1 week
2010-04-06 18:57:50 +00:00
Michael Tuexen
b5c164935e * Fix some race condition in SACK/NR-SACK processing.
* Fix handling of mapping arrays when draining mbufs or processing
  FORWARD-TSN chunks.
* Cleanup code (no duplicate code anymore for SACKs and NR-SACKs).
Part of this code was developed together with rrs.
MFC after: 2 weeks.
2010-04-03 15:40:14 +00:00
Randall Stewart
77acdc2565 Fix for NR-Sack code. The code was NOT working properly when
enabled. Basically most of the operations were incorrect causing
bad sacks when you enabled nr-sack. The fixes range across
4 files and unifiy most of the processing so that we only test
nr_sack flags to decide which type of sack to generate.

Optimization left for this is to combine the sack generation
code and make it capable of generating either sack thus shrinking
out a routine.

Reviewed by:	tuexen@freebsd.org
2010-03-24 19:45:36 +00:00
Randall Stewart
0e13104de6 Fixes a bug where SACKs in the face of
mapping_array expansion would break. Basically
once we expanded the array we no longer had both
mapping arrays in sync which the sack processing code depends on.
This would mean we were randomly referring to memory that was probably
not there. This mostly just gave us bad sack results going back to the peer.
If INVARIENTS was on of course we would hit the panic routine in the sack_check
call.

We also add a print routine for the place where one would panic in
invarients so one can see what the main mapping array holds.

Reviewed by: tuexen@freebsd.org
MFC after:	2 weeks
2010-03-23 01:36:50 +00:00
Michael Tuexen
63eda93d1a Use uint32_t instead of u_long.
MFC after: 1 week
2010-02-18 13:46:54 +00:00
Michael Tuexen
cd55430963 Get rid of a lot of duplicated code for NR-SACK handle.
Generalize the SACK to code handle also NR-SACKs.
2010-01-17 21:00:28 +00:00
Michael Tuexen
24ae5c4a73 This fixes a bug where the value set by SCTP_PARTIAL_DELIVERY_POINT
was not honored, if the socket buffer size was not 4 times that large.

Approved by: rrs (mentor)
MFC after: 3 days.
2009-08-24 11:46:40 +00:00
Randall Stewart
0fa753b3fb This fixes two bugs in the NR-Sack code:
1) When calculating the table offset for sliding the sack
    array, the two byte values must be "ored" together in order
    for us to do the correct sliding of the arrays.
 2) We were NOT properly doing CC and other changes to things only
    NR-Sacked. The solution here is to make a separate function that
    will actually do both CC/updates and free things if its NR sack'd.
    This actually shrinks out common code from three places (much better).

MFC after:	3 days
2009-08-24 11:13:32 +00:00