Commit Graph

5864 Commits

Author SHA1 Message Date
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
Conrad Meyer
222daa421f style: Remove remaining deprecated MALLOC/FREE macros
Mechanically replace uses of MALLOC/FREE with appropriate invocations of
malloc(9) / free(9) (a series of sed expressions).  Something like:

* MALLOC(a, b, ... -> a = malloc(...
* FREE( -> free(
* free((caddr_t) -> free(

No functional change.

For now, punt on modifying contrib ipfilter code, leaving a definition of
the macro in its KMALLOC().

Reported by:	jhb
Reviewed by:	cy, imp, markj, rmacklem
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D14035
2018-01-25 22:25:13 +00:00
Mark Johnston
5557762b72 Use tcpinfoh_t for TCP headers in the tcp:::debug-{drop,input} probes.
The header passed to these probes has some fields converted to host
order by tcp_fields_to_host(), so the tcpinfo_t translator doesn't do
what we want.

Submitted by:	Hannes Mehnert
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D12647
2018-01-25 15:35:34 +00:00
Navdeep Parhar
09b0b8c058 Do not generate illegal mbuf chains during IP fragment reassembly. Only
the first mbuf of the reassembled datagram should have a pkthdr.

This was discovered with cxgbe(4) + IPSEC + ping with payload more than
interface MTU.  cxgbe can generate !M_WRITEABLE mbufs and this results
in m_unshare being called on the reassembled datagram, and it complains:

panic: m_unshare: m0 0xfffff80020f82600, m 0xfffff8005d054100 has M_PKTHDR

PR:		224922
Reviewed by:	ae@
MFC after:	1 week
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D14009
2018-01-24 05:09:21 +00:00
Ryan Stone
fc21c53f63 Reduce code duplication for inpcb route caching
Add a new macro to clear both the L3 and L2 route caches, to
hopefully prevent future instances where only the L3 cache was
cleared when both should have been.

MFC after:	1 week
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D13989
Reviewed by:	karels
2018-01-23 03:15:39 +00:00
Michael Tuexen
e9a3a1b13c Fix a bug related to fast retransmissions.
When processing a SACK advancing the cumtsn-ack in fast recovery,
increment the miss-indications for all TSN's reported as missing.

Thanks to Fabian Ising for finding the bug and to Timo Voelker
for provinding a fix.

This fix moves also CMT related initialisation of some variables
to a more appropriate place.

MFC after:	1 week
2018-01-16 21:58:38 +00:00
Michael Tuexen
46bf534caf Don't provide a (meaningless) cmsg when proving a notification
in a recvmsg() call.

MFC after:	1 week
2018-01-15 21:59:20 +00:00
Pedro F. Giffuni
84f210952c libalias: small memory allocation cleanups.
Make the calloc wrappers behave as expected by using mallocarray.
It is rather weird that the malloc wrappers also zeroes the memory: update
a comment to reflect at least two cases where it is expected.

Reviewed by:	tuexen
2018-01-12 23:12:30 +00:00
Cy Schubert
f813e520c2 Correct the comment describing badrs which is bad router solicitiation,
not bad router advertisement.

MFC after:	3 days
2017-12-29 07:23:18 +00:00
Michael Tuexen
fa5867cbd6 White cleanups. 2017-12-26 16:33:55 +00:00
Michael Tuexen
f34a628e7e Clearify CID 1008197.
MFC after:	3 days
2017-12-26 16:12:04 +00:00
Michael Tuexen
0460135495 Clearify issue reported in CID 1008198.
MFC after:	3 days
2017-12-26 16:06:11 +00:00
Michael Tuexen
f6ea123171 Fix CID 1008428.
MFC after:	1 week
2017-12-26 15:29:11 +00:00
Michael Tuexen
4830aee72f Fix CID 1008936. 2017-12-26 15:24:42 +00:00
Michael Tuexen
c9256941d0 Allow the first (and second) argument of sn_calloc() be a sum.
This fixes a bug reported in
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=224103
PR:		224103
2017-12-26 14:37:47 +00:00
Michael Tuexen
cd90150413 When adding support for sending SCTP packets containing an ABORT chunk
to ipfw in https://svnweb.freebsd.org/changeset/base/326233,
a dependency on the SCTP stack was added to ipfw by accident.

This was noted by Kevel Bowling in https://reviews.freebsd.org/D13594
where also a solution was suggested. This patch is based on Kevin's
suggestion, but implements the required SCTP checksum computation
without any dependency on other SCTP sources.

While there, do some cleanups and improve comments.

Thanks to Kevin Kevin Browling for reporting the issue and suggesting
a fix.
2017-12-26 12:35:02 +00:00
Alexander Kabaev
151ba7933a Do pass removing some write-only variables from the kernel.
This reduces noise when kernel is compiled by newer GCC versions,
such as one used by external toolchain ports.

Reviewed by: kib, andrew(sys/arm and sys/arm64), emaste(partial), erj(partial)
Reviewed by: jhb (sys/dev/pci/* sys/kern/vfs_aio.c and sys/kern/kern_synch.c)
Differential Revision: https://reviews.freebsd.org/D10385
2017-12-25 04:48:39 +00:00
Andrey V. Elsukov
2aad62408b Fix mbuf leak when TCPMD5_OUTPUT() method returns error.
PR:		223817
MFC after:	1 week
2017-12-14 12:54:20 +00:00
Michael Tuexen
cd6340caf7 Cleaup, no functional change. 2017-12-13 17:11:57 +00:00
Gleb Smirnoff
66492fea49 Separate out send buffer autoscaling code into function, so that
alternative TCP stacks may reuse it instead of pasting.

Obtained from:	Netflix
2017-12-07 22:36:58 +00:00
Michael Tuexen
9f0abda051 Retire SCTP_WITH_NO_CSUM option.
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.
2017-12-07 22:19:08 +00:00
Pedro F. Giffuni
fe267a5590 sys: general adoption of SPDX licensing ID tags.
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.
2017-11-27 15:23:17 +00:00
Michael Tuexen
665c8a2ee5 Add to ipfw support for sending an SCTP packet containing an ABORT chunk.
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
2017-11-26 18:19:01 +00:00
Michael Tuexen
18442f0a5b Fix SPDX line as suggested by pfg 2017-11-24 19:38:59 +00:00
Michael Tuexen
ad15e1548f Unbreak compilation when using SCTP_DETAILED_STR_STATS option.
MFC after:	1 week
2017-11-24 12:18:48 +00:00
Michael Tuexen
b7d2b5d5b1 Add SPDX line. 2017-11-24 11:25:53 +00:00
Mark Johnston
7a5c730561 Use the right variable for the IP header parameter to tcp:::send.
This addresses a regression from r311225.

MFC after:	1 week
2017-11-22 14:13:40 +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
3e87bccde3 Fix the handling of ERROR chunks which a lot of error causes.
While there, clean up the code.
Thanks to Felix Weinrank who found the bug by using fuzz-testing
the SCTP userland stack.

MFC after:	1 week
2017-11-15 22:13:10 +00:00
Michael Tuexen
d0f6ab7920 Simply the code and use the full buffer for contigous chunk representation.
MFC after:	1 week
2017-11-14 02:30:21 +00:00
Gleb Smirnoff
3e21cbc802 Style r320614: don't initialize at declaration, new line after declarations,
shorten variable name to avoid extra long lines.
No functional changes.
2017-11-13 22:16:47 +00:00
Michael Tuexen
469a65d1f8 Cleanup the handling of control chunks. While there fix some minor
bug related to clearing the assoc retransmit counter and the dup TSN
handling of NR-SACK chunks.

MFC after:	3 days
2017-11-12 21:43:33 +00:00
Konstantin Belousov
06193f0be0 Use hardware timestamps to report packet timestamps for SO_TIMESTAMP
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
2017-11-07 09:46:26 +00:00
Michael Tuexen
253a63b817 Fix an accounting bug where data was counted twice if on the read
queue and on the ordered or unordered queue.
While there, improve the checking in INVARIANTs when computing the
a_rwnd.

MFC after:	3 days
2017-11-05 11:59:33 +00:00
Michael Tuexen
28a6adde1d Allow the setting of the MTU for future paths using an SCTP socket option.
This functionality was missing.

MFC after:	1 week
2017-11-03 20:46:12 +00:00
Michael Tuexen
ba5fc4cf78 Fix the reporting of the MTU for SCTP sockets when using IPv6.
MFC after:	1 week
2017-11-01 16:32:11 +00:00
Michael Tuexen
966dfbf910 Fix parsing error when processing cmsg in SCTP send calls. Thei bug is
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.
2017-10-27 19:27:05 +00:00
Michael Tuexen
8d9b040dd4 Fix a bug reported by Felix Weinrank using the libfuzzer on the
userland stack.

MFC after:	3 days
2017-10-25 09:12:22 +00:00
Michael Tuexen
701492a5f6 Fix a bug in handling special ABORT chunks.
Thanks to Felix Weinrank for finding this issue using libfuzzer with
the userland stack.

MFC after:	3 days
2017-10-24 16:24:12 +00:00
Michael Tuexen
adc59f7f46 Fix a locking issue found by running AFL on the userland stack.
Thanks to Felix Weinrank for reporting the issue.

MFC after:	3 days
2017-10-24 14:28:56 +00:00
Alexander Motin
81098a018e Relax per-ifnet cif_vrs list double locking in carp(4).
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.
2017-10-19 09:01:15 +00:00
Michael Tuexen
af03054c8a Fix a signed/unsigned warning.
MFC after:	1 week
2017-10-18 21:08:35 +00:00
Michael Tuexen
7f75695a3e Abort an SCTP association, when a DATA chunk is followed by an unknown
chunk with a length smaller than the minimum length.

Thanks to Felix Weinrank for making me aware of the problem.
MFC after:	3 days
2017-10-18 20:17:44 +00:00
Michael Tuexen
0d5af38ceb Revert change which got in accidently. 2017-10-18 18:59:35 +00:00
Michael Tuexen
3ed8d364a7 Fix a bug introduced in r324638.
Thanks to Felix Weinrank for making me aware of this.

MFC after:	3 days
2017-10-18 18:56:56 +00:00
Michael Tuexen
80a2d1406f Fix the handling of parital and too short chunks.
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
2017-10-15 19:33:30 +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
Gleb Smirnoff
3bdf4c4274 Declare more TCP globals in tcp_var.h, so that alternative TCP stacks
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.
2017-10-11 20:36:09 +00:00
Gleb Smirnoff
e29c55e4bb Declare pmtud_blackhole global variables in tcp_timer.h, so that
alternative TCP stacks can legally use them.
2017-10-06 20:33:40 +00:00