This option was used in the early days to allow performance measurements
extrapolating the use of SCTP checksum offloading. Since this feature
is now available, get rid of this option.
This also un-breaks the LINT kernel. Thanks to markj@ for making me
aware of the problem.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.
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.
No functional change intended.
This is similar to the TCP case. where a TCP RST segment can be sent.
There is one limitation: When sending an ABORT in response to an incoming
packet, it should be tested if there is no ABORT chunk in the received
packet. Currently, it is only checked if the first chunk is an ABORT
chunk to avoid parsing the whole packet, which could result in a DOS attack.
Thanks to Timo Voelker for helping me to test this patch.
Reviewed by: bcr@ (man page part), ae@ (generic, non-SCTP part)
Differential Revision: https://reviews.freebsd.org/D13239
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.
and other similar socket options.
Provide new control message SCM_TIME_INFO to supply information about
timestamp. Currently it indicates that the timestamp was
hardware-assisted and high-precision, for software timestamps the
message is not returned. Reserved fields are added to ABI to report
additional info about it, it is expected that raw hardware clock value
might be useful for some applications.
Reviewed by: gallatin (previous version), hselasky
Sponsored by: Mellanox Technologies
MFC after: 2 weeks
X-Differential revision: https://reviews.freebsd.org/D12638
related to a signed/unsigned mismatch.
This should most likely fix the issue in sctp_sosend reported by
Dmitry Vyukov on the freebsd-hackers mailing list and found by
running syzkaller.
In all cases where cif_vrs list is modified, two locks are held: per-ifnet
CIF_LOCK and global carp_sx. It means to read that list only one of them
is enough to be held, so we can skip CIF_LOCK when we already have carp_sx.
This fixes kernel panic, caused by attempts of copyout() to sleep while
holding non-sleepable CIF_LOCK mutex.
Discussed with: glebius
MFC after: 2 weeks
Sponsored by: iXsystems, Inc.
Ensure that the current behaviour is consistent: stop processing
of the chunk, but finish the processing of the previous chunks.
This behaviour might be changed in a later commit to ABORT the
assoication due to a protocol violation, but changing this
is a separate issue.
MFC after: 3 days
can use them. Gather all TCP tunables in tcp_var.h in one place and
alphabetically sort them, to ease maintainance of the list.
Don't copy and paste declarations in tcp_stacks/fastpath.c.
not extraneous in the TCP Fast Open (TFO) passive-open case. In the
TFO passive-open case, syncache_socket() is being called during
processing of a TFO SYN bearing a valid cookie, and a call to
soisconnected() is required in order to allow the application to
immediately consume any data delivered in the SYN and to have a chance
to generate response data to accompany the SYN-ACK. The removal of
this call to soisconnected() effectively converted all TFO passive
opens to having the same RTT cost as a standard 3WHS.
This commit adds a call to soisconnected() to syncache_tfo_expand() so
that it is only in the TFO passive-open path, thereby restoring TFO
passve-open RTT performance and preserving the non-TFO connection-rate
performance gains realized by r307966.
MFC after: 1 week
Sponsored by: Limelight Networks
been destroyed before its tcptw with INVARIANTS undefined.
This is a symmetric change of r307551:
A INP_TIMEWAIT inp should not be destroyed before its tcptw, and INVARIANTS
will catch this case. If INVARIANTS is undefined it will emit a log(LOG_ERR)
and avoid a hard to debug infinite loop in tcp_tw_2msl_scan().
Reported by: Ben Rubson, hselasky
Submitted by: hselasky
Tested by: Ben Rubson, jch
MFC after: 1 week
Sponsored by: Verisign, inc
Differential Revision: https://reviews.freebsd.org/D12267
* check mbuf length before doing mtod() and accessing to IP header;
* update oip pointer and all depending pointers after m_pullup();
* remove extra checks and extra parentheses, wrap long lines;
PR: 222670
Reported by: Prabhakar Lakhera
MFC after: 1 week
_NO_ OSes actually "negotiate" MSS.
RFC 879:
"... This Maximum Segment Size (MSS) announcement (often mistakenly
called a negotiation) ..."
This negotiation behaviour was introduced 11 years ago by r159955
without any explaination about why FreeBSD had to "negotiate" MSS:
In syncache_respond() do not reply with a MSS that is larger than what
the peer announced to us but make it at least tcp_minmss in size.
Sponsored by: TCP/IP Optimization Fundraise 2005
The tcp_minmss behaviour is still kept.
Syncookie fix was prodded by tuexen, who also helped to test this
patch w/ packetdrill.
Reviewed by: tuexen, karels, bz (previous version)
MFC after: 2 week
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D12430
